• added possibility to change location of application

• set all JOptionPane positions relative to their parent • known bug: relative position does not work when clicking "back" in ftpcreateimage
author: Nino Breuer 2014-10-09 14:52:01 +0200
committer: Nino Breuer 2014-10-09 14:52:01 +0200
commit: 39833fd5db8f92dcc4a34a623b6e4f59cde2e74f (patch)
tree: e4db6866847c11ac27a339a58f2f220bf836490c /dozentenmodul/src/main/java
parent: Merge branch 'master' of ssh://git.openslx.org/openslx-ng/tutor-module (diff)
download: tutor-module-39833fd5db8f92dcc4a34a623b6e4f59cde2e74f.tar.gz
tutor-module-39833fd5db8f92dcc4a34a623b6e4f59cde2e74f.tar.xz
tutor-module-39833fd5db8f92dcc4a34a623b6e4f59cde2e74f.zip
27 files changed, 361 insertions, 329 deletions
diff --git a/dozentenmodul/src/main/java/gui/image/CreateImageAllgemein_GUI.java b/dozentenmodul/src/main/java/gui/image/CreateImageAllgemein_GUI.java
index 6bc6681d..4a00f1ec 100644
--- a/dozentenmodul/src/main/java/gui/image/CreateImageAllgemein_GUI.java
+++ b/dozentenmodul/src/main/java/gui/image/CreateImageAllgemein_GUI.java
@@ -4,6 +4,7 @@ import gui.intro.About_GUI;
 import gui.intro.MainMenue_GUI;
 
 import java.awt.Color;
+import java.awt.Component;
 import java.awt.FlowLayout;
 import java.awt.Font;
 import java.awt.SystemColor;
@@ -61,6 +62,7 @@ public class CreateImageAllgemein_GUI extends JFrame {
 	private JTextArea textAreadesc;
 	private final int MAX_DESCRIPTION_LENGTH = 254;
 	private JTextArea txtrGebenSieBitte_1;
+	Component c = null;
 	private static final String HELP_MESSAGE = "<html><div align = \"center\">" +
 			"Hier legen Sie zunächst ein Image an. <br />" +
 			"Dieses stellt die Grundlage Ihres Labors dar. Das Image ist der \"PC\", mit dem die Studenten arbeiten. <br />" +
@@ -72,7 +74,7 @@ public class CreateImageAllgemein_GUI extends JFrame {
 	/**
 	 * Create the dialog.
 	 */
-	public CreateImageAllgemein_GUI() {
+	public CreateImageAllgemein_GUI(Component formerGUI) {
 		addWindowListener(new WindowAdapter() {
 			@Override
 			public void windowClosing(WindowEvent arg0) {
@@ -95,7 +97,7 @@ public class CreateImageAllgemein_GUI extends JFrame {
 				| IllegalAccessException | UnsupportedLookAndFeelException e) {
 			LOGGER.error("Setting look and feel from system failed.");
 			e.printStackTrace();
-			JOptionPane.showMessageDialog(null,
+			JOptionPane.showMessageDialog(c,
 					"Konnte das Farbschema des Systems nicht übernehmen.", "Debug-Message",
 					JOptionPane.ERROR_MESSAGE);
 		}
@@ -103,7 +105,7 @@ public class CreateImageAllgemein_GUI extends JFrame {
 		setTitle("bwLehrpool Suite - Image erzeugen");
 		// Zentriert das Fenster
 		setBounds(0, 0, 603, 722);
-		GuiOrganizer.centerGUI(this);
+		setLocationRelativeTo(formerGUI);
 
 		getContentPane().setLayout(null);
 		{
@@ -276,7 +278,7 @@ public class CreateImageAllgemein_GUI extends JFrame {
 			public void mouseClicked(MouseEvent arg0) {
 				// oeffnet das Hauptmenue
 				CreateImageAllgemein_GUI.this.setVisible(false);
-				MainMenue_GUI main = new MainMenue_GUI();
+				MainMenue_GUI main = new MainMenue_GUI(c);
 				main.setVisible(true);
 			}
 		});
@@ -312,7 +314,7 @@ public class CreateImageAllgemein_GUI extends JFrame {
 					public void actionPerformed(ActionEvent e) {
 						Image.image.setImagename(imagename.getText());
 						Image.image.setDesc(textAreadesc.getText());
-						MainMenue_GUI sr = new MainMenue_GUI();
+						MainMenue_GUI sr = new MainMenue_GUI(c);
 						sr.setVisible(true);
 						dispose();
 					}
@@ -336,7 +338,7 @@ public class CreateImageAllgemein_GUI extends JFrame {
 									+ Image.image.getDesc()+"\"");
 							
 							// Zeige nächsten Schritt an
-							CreateImageTechnisch_GUI ea = new CreateImageTechnisch_GUI();
+							CreateImageTechnisch_GUI ea = new CreateImageTechnisch_GUI(c);
 							ea.setVisible(true);
 							dispose();
 						}
@@ -372,7 +374,7 @@ public class CreateImageAllgemein_GUI extends JFrame {
 					OpenLinks.openWebpage(windows);
 				} catch (URISyntaxException e) {
 					e.printStackTrace();
-					JOptionPane.showMessageDialog(null,
+					JOptionPane.showMessageDialog(c,
 							"Konnte die URL '" + Links.getFAQ() + "' nicht öffnen!",
 							"Fehler",
 							JOptionPane.ERROR_MESSAGE);
@@ -391,7 +393,7 @@ public class CreateImageAllgemein_GUI extends JFrame {
 					OpenLinks.openWebpage(windows);
 				} catch (URISyntaxException e) {
 					e.printStackTrace();
-					JOptionPane.showMessageDialog(null,
+					JOptionPane.showMessageDialog(c,
 							"Konnte die URL '" + Links.getOTRS() + "' nicht öffnen!",
 							"Fehler",
 							JOptionPane.ERROR_MESSAGE);
@@ -414,11 +416,11 @@ public class CreateImageAllgemein_GUI extends JFrame {
 		mnNewMenu_Info.addMouseListener(new MouseAdapter() {
 			@Override
 			public void mouseClicked(MouseEvent arg0) {
-				JOptionPane.showMessageDialog(null, HELP_MESSAGE, "Hilfe zu dieser Oberfläche", JOptionPane.INFORMATION_MESSAGE);
+				JOptionPane.showMessageDialog(c, HELP_MESSAGE, "Hilfe zu dieser Oberfläche", JOptionPane.INFORMATION_MESSAGE);
 			}
 		});
 		menuBar.add(mnNewMenu_Info);
-
+		c = this;
 	}// end main
 
 	/**
@@ -438,7 +440,7 @@ public class CreateImageAllgemein_GUI extends JFrame {
 				|| EMail.getText().isEmpty()) {
 			// missing some fields
 			LOGGER.info("Form has missing fields, warning user.");
-			JOptionPane.showMessageDialog(null,
+			JOptionPane.showMessageDialog(c,
 							"Bitte geben Sie alle notwendigen Daten an!",
 							"Daten unvollständig",
 							JOptionPane.ERROR_MESSAGE);
@@ -449,7 +451,7 @@ public class CreateImageAllgemein_GUI extends JFrame {
 		if (!imagename.getText().matches("[a-zA-Z0-9]+")) {
 			LOGGER.info("Image name not alpha-numerical, warning user.");
 			JOptionPane.showMessageDialog(
-							null,
+							c,
 							"Der Imagename darf keine Leer- oder Sonderzeichen enthalten.",
 							"Unerlaubte Zeichen",
 							JOptionPane.ERROR_MESSAGE);
@@ -458,7 +460,7 @@ public class CreateImageAllgemein_GUI extends JFrame {
 
 		// max length for image description is 254 chars
 		if (textAreadesc.getText().length() >= MAX_DESCRIPTION_LENGTH) {
-			JOptionPane.showMessageDialog(null,
+			JOptionPane.showMessageDialog(c,
 					"Die Beschreibung darf max 254 Zeichen enthalten. Aktuell enthält sie "+textAreadesc.getText().length()+".",
 					"Beschreibung zu umfangreich",
 					JOptionPane.ERROR_MESSAGE);
diff --git a/dozentenmodul/src/main/java/gui/image/CreateImageTechnisch_GUI.java b/dozentenmodul/src/main/java/gui/image/CreateImageTechnisch_GUI.java
index cd3cca87..b2fb21fd 100644
--- a/dozentenmodul/src/main/java/gui/image/CreateImageTechnisch_GUI.java
+++ b/dozentenmodul/src/main/java/gui/image/CreateImageTechnisch_GUI.java
@@ -6,6 +6,7 @@ import gui.intro.Login_GUI;
 import gui.intro.MainMenue_GUI;
 
 import java.awt.Color;
+import java.awt.Component;
 import java.awt.FlowLayout;
 import java.awt.Font;
 import java.awt.SystemColor;
@@ -72,6 +73,7 @@ public class CreateImageTechnisch_GUI extends JFrame {
 	private final ButtonGroup buttonGroupVorlage = new ButtonGroup();
 	ThriftConnection con = new ThriftConnection();
 	Client client = models.Client.clientcon.getClient();
+	Component c = null;
 	private static final String HELP_MESSAGE =	"<html><div align = \"center\">" +
 											   	"Geben Sie hier bitte einige technische Daten an, die dann mit dem Image angezeigt werden.<br />" +
 											   	"Dies wird beispielsweise benötigt, wenn ein Dozent eine Veranstaltung hat,<br />" +
@@ -83,7 +85,7 @@ public class CreateImageTechnisch_GUI extends JFrame {
 	/**
 	 * Create the dialog.
 	 */
-	public CreateImageTechnisch_GUI() {
+	public CreateImageTechnisch_GUI(Component formerGUI) {
 		addWindowListener(new WindowAdapter() {
 			@Override
 			public void windowClosing(WindowEvent arg0) {
@@ -102,7 +104,7 @@ public class CreateImageTechnisch_GUI extends JFrame {
 		setTitle("bwLehrpool Suite - Image erzeugen");
 
 		setBounds(0, 0, 603, 722);
-		GuiOrganizer.centerGUI(this);
+		setLocationRelativeTo(formerGUI);
 		
 		getContentPane().setLayout(null);
 		{
@@ -264,7 +266,7 @@ public class CreateImageTechnisch_GUI extends JFrame {
 			public void mouseClicked(MouseEvent arg0) {
 				
 				CreateImageTechnisch_GUI.this.setVisible(false);
-				MainMenue_GUI main=new MainMenue_GUI();
+				MainMenue_GUI main=new MainMenue_GUI(c);
 				main.setVisible(true);
 			}
 		});
@@ -305,7 +307,7 @@ public class CreateImageTechnisch_GUI extends JFrame {
 						Image.image.setCpu(Integer.valueOf(spinnerCPU.getValue().toString()).intValue());
 						Image.image.setRam(Integer.valueOf(spinnerRam.getValue().toString()).intValue());
 						Image.image.setOS(comboBox.getSelectedItem().toString());
-						CreateImageAllgemein_GUI sr=new CreateImageAllgemein_GUI();
+						CreateImageAllgemein_GUI sr=new CreateImageAllgemein_GUI(c);
 						sr.setVisible(true);
 						dispose();
 					}
@@ -325,7 +327,7 @@ public class CreateImageTechnisch_GUI extends JFrame {
 						Image.image.setRam(Integer.valueOf(spinnerRam.getValue().toString()).intValue());
 						Image.image.setOS(comboBox.getSelectedItem().toString());
 						LOGGER.info("Betriebssystem: "+Image.image.getOS()+",  istVorlage: "+Image.image.isVorlage()+", Lizenzpflichtig: "+Image.image.isLicensed()+", Internetsperre: "+Image.image.isInternet()+", CPU: "+Image.image.getCpu()+",  RAM: "+Image.image.getRam());
-						PermissionCreateImage_GUI ea=new PermissionCreateImage_GUI();
+						PermissionCreateImage_GUI ea=new PermissionCreateImage_GUI(c);
 						ea.setVisible(true);
 						dispose();
 					}
@@ -396,10 +398,11 @@ public class CreateImageTechnisch_GUI extends JFrame {
 		mnNewMenu_Info.addMouseListener(new MouseAdapter() {
 			@Override
 			public void mouseClicked(MouseEvent arg0) {
-				JOptionPane.showMessageDialog(null, HELP_MESSAGE, "Hilfe zu dieser Oberfläche", JOptionPane.INFORMATION_MESSAGE);
+				JOptionPane.showMessageDialog(c, HELP_MESSAGE, "Hilfe zu dieser Oberfläche", JOptionPane.INFORMATION_MESSAGE);
 			}
 		});
 		menuBar.add(mnNewMenu_Info);
 		
+		c = this;
 	}
 }
diff --git a/dozentenmodul/src/main/java/gui/image/DeleteImage_GUI.java b/dozentenmodul/src/main/java/gui/image/DeleteImage_GUI.java
index fc9fa1e7..595a97d0 100644
--- a/dozentenmodul/src/main/java/gui/image/DeleteImage_GUI.java
+++ b/dozentenmodul/src/main/java/gui/image/DeleteImage_GUI.java
@@ -4,6 +4,7 @@ import gui.intro.About_GUI;
 import gui.intro.MainMenue_GUI;
 
 import java.awt.Color;
+import java.awt.Component;
 import java.awt.FlowLayout;
 import java.awt.Font;
 import java.awt.HeadlessException;
@@ -89,6 +90,7 @@ public class DeleteImage_GUI extends JFrame {
 	JTable tablemyImages;
 	private JTextField textFieldName;
 	boolean activeSearch = false;
+	Component c = null;
 	String[] titles = { "Name", "Lizenzpflichtig", "OS", "Veranstaltung",
 			"Verantwortlicher", "Letztes Update", "ID", "Version", "Template" }; // Angezeigt
 																					// werden
@@ -138,7 +140,7 @@ public class DeleteImage_GUI extends JFrame {
 	/**
 	 * Create the dialog.
 	 */
-	public DeleteImage_GUI() {
+	public DeleteImage_GUI(Component formerGUI) {
 		addWindowListener(new WindowAdapter() {
 			@Override
 			public void windowClosing(WindowEvent arg0) {
@@ -241,7 +243,7 @@ public class DeleteImage_GUI extends JFrame {
 		setTitle("bwLehrpool Suite - Image löschen");
 		// Zentriert das Fenster in die Bildmitte
 		setBounds(0, 0, 918, 722);
-		GuiOrganizer.centerGUI(this);
+		setLocationRelativeTo(formerGUI);
 
 		final DefaultTableModel model = new DefaultTableModel(titles, 0);
 
@@ -339,7 +341,7 @@ public class DeleteImage_GUI extends JFrame {
 		} catch (TException e2) {
 			// TODO Auto-generated catch block
 			e2.printStackTrace();
-			JOptionPane.showMessageDialog(null,
+			JOptionPane.showMessageDialog(c,
 					e2.getCause() + "\n" + e2.getStackTrace(), "Debug-Message",
 					JOptionPane.ERROR_MESSAGE);
 		}
@@ -382,7 +384,7 @@ public class DeleteImage_GUI extends JFrame {
 				// oeffnet das Hauuetmenue
 
 				DeleteImage_GUI.this.setVisible(false);
-				MainMenue_GUI main = new MainMenue_GUI();
+				MainMenue_GUI main = new MainMenue_GUI(c);
 				main.setVisible(true);
 			}
 		});
@@ -419,7 +421,7 @@ public class DeleteImage_GUI extends JFrame {
 				if (tablemyImages.getSelectedRowCount() != 0) {
 
 					// frage, soll das selektierte Daten geloescht werden?
-					eingabe = JOptionPane.showConfirmDialog(null,
+					eingabe = JOptionPane.showConfirmDialog(c,
 							"Wollen Sie diese Daten löschen?", "Löschen?",
 							JOptionPane.YES_NO_OPTION);
 
@@ -453,7 +455,7 @@ public class DeleteImage_GUI extends JFrame {
 										// if (client.deleteImageServer(imageid
 										// ,imageversion)) {
 
-										DeleteImage_GUI di = new DeleteImage_GUI();
+										DeleteImage_GUI di = new DeleteImage_GUI(c);
 										di.setVisible(true);
 										dispose();
 
@@ -461,7 +463,7 @@ public class DeleteImage_GUI extends JFrame {
 
 										JOptionPane
 												.showConfirmDialog(
-														null,
+														c,
 														"Löschen von der DB hat leider nicht geklappt!!",
 														"Fehler",
 														JOptionPane.INFORMATION_MESSAGE);
@@ -470,7 +472,7 @@ public class DeleteImage_GUI extends JFrame {
 									// TODO Auto-generated catch block
 									e.printStackTrace();
 									JOptionPane.showMessageDialog(
-											null,
+											c,
 											e.getCause() + "\n"
 													+ e.getStackTrace(),
 											"Debug-Message",
@@ -479,7 +481,7 @@ public class DeleteImage_GUI extends JFrame {
 									// TODO Auto-generated catch block
 									e.printStackTrace();
 									JOptionPane.showMessageDialog(
-											null,
+											c,
 											e.getCause() + "\n"
 													+ e.getStackTrace(),
 											"Debug-Message",
@@ -490,7 +492,7 @@ public class DeleteImage_GUI extends JFrame {
 
 								JOptionPane
 										.showMessageDialog(
-												null,
+												c,
 												"Image kann nicht gelöscht werden, da mindestens eine Veranstaltung mit diesem Image verlinkt ist.",
 												"Verlinkung vorhanden",
 												JOptionPane.INFORMATION_MESSAGE);
@@ -498,7 +500,7 @@ public class DeleteImage_GUI extends JFrame {
 						} catch (TException e) {
 							// TODO Auto-generated catch block
 							e.printStackTrace();
-							JOptionPane.showMessageDialog(null, e.getCause()
+							JOptionPane.showMessageDialog(c, e.getCause()
 									+ "\n" + e.getStackTrace(),
 									"Debug-Message", JOptionPane.ERROR_MESSAGE);
 						}
@@ -685,7 +687,7 @@ public class DeleteImage_GUI extends JFrame {
 
 						// oeffnet das Hauptmenue
 
-						MainMenue_GUI main = new MainMenue_GUI();
+						MainMenue_GUI main = new MainMenue_GUI(c);
 						main.setVisible(true);
 						dispose();
 					}
@@ -891,11 +893,12 @@ public class DeleteImage_GUI extends JFrame {
 		mnNewMenu_Info.addMouseListener(new MouseAdapter() {
 			@Override
 			public void mouseClicked(MouseEvent arg0) {
-				JOptionPane.showMessageDialog(null, HELP_MESSAGE, "Hilfe zu dieser Oberfläche", JOptionPane.INFORMATION_MESSAGE);
+				JOptionPane.showMessageDialog(c, HELP_MESSAGE, "Hilfe zu dieser Oberfläche", JOptionPane.INFORMATION_MESSAGE);
 			}
 		});
 		menuBar.add(mnNewMenu_Info);
 
+		c = this;
 	}
 
 	// Initiale Beffuelung eines Table models
@@ -932,7 +935,7 @@ public class DeleteImage_GUI extends JFrame {
 		} catch (TException | ParseException e1) {
 			// TODO Auto-generated catch block
 			e1.printStackTrace();
-			JOptionPane.showMessageDialog(null,
+			JOptionPane.showMessageDialog(c,
 					e1.getCause() + "\n" + e1.getStackTrace(), "Debug-Message",
 					JOptionPane.ERROR_MESSAGE);
 		}
diff --git a/dozentenmodul/src/main/java/gui/image/EditImageAllgemein_GUI.java b/dozentenmodul/src/main/java/gui/image/EditImageAllgemein_GUI.java
index c9504135..91770b26 100644
--- a/dozentenmodul/src/main/java/gui/image/EditImageAllgemein_GUI.java
+++ b/dozentenmodul/src/main/java/gui/image/EditImageAllgemein_GUI.java
@@ -5,6 +5,7 @@ import gui.intro.Login_GUI;
 import gui.intro.MainMenue_GUI;
 
 import java.awt.Color;
+import java.awt.Component;
 import java.awt.FlowLayout;
 import java.awt.Font;
 import java.awt.SystemColor;
@@ -77,6 +78,7 @@ public class EditImageAllgemein_GUI extends JFrame {
 	private boolean nameIsOK = false; //imagename only contains letters
 	private boolean descriptionLengthOK = false; //description may not be longer than MAX_DESCRIPTION_LENGTH
 	private final int MAX_DESCRIPTION_LENGTH = 254;
+	Component c = null;
 	private static final String HELP_MESSAGE =	"<html><div align = \"center\">" +
 		   	"Bearbeiten Sie hier die allgemeinen Angaben, die Sie beim Erzeugen des Images hinterlegt haben.<br />" +
 		   	"Sie können sowohl den Anzeigenamen als auch die Beschreibung ändern.<br />" +
@@ -86,7 +88,7 @@ public class EditImageAllgemein_GUI extends JFrame {
 	/**
 	 * Create the dialog.
 	 */
-	public EditImageAllgemein_GUI() {
+	public EditImageAllgemein_GUI(Component formerGUI) {
 		addWindowListener(new WindowAdapter() {
 			@Override
 			public void windowClosing(WindowEvent arg0) {
@@ -110,7 +112,7 @@ public class EditImageAllgemein_GUI extends JFrame {
 
 		// Zentriert das Fenster in der Bildmitte
 		setBounds(0, 0, 603, 722);
-		GuiOrganizer.centerGUI(this);
+		setLocationRelativeTo(formerGUI);
 		initData();
 		getContentPane().setLayout(null);
 		{
@@ -274,7 +276,7 @@ public class EditImageAllgemein_GUI extends JFrame {
 				// unsichtbar und das Hauptmenue sichtbar
 				
 				EditImageAllgemein_GUI.this.setVisible(false);
-				MainMenue_GUI main = new MainMenue_GUI();
+				MainMenue_GUI main = new MainMenue_GUI(c);
 				main.setVisible(true);
 			}
 		});
@@ -313,7 +315,7 @@ public class EditImageAllgemein_GUI extends JFrame {
 						// Daten bei einem erneuten Aufruf verfuegbar
 						// Image.image.setImagename(imagename.getText());
 						
-						SearchEditImage_GUI se = new SearchEditImage_GUI();
+						SearchEditImage_GUI se = new SearchEditImage_GUI(c);
 						se.setVisible(true);
 						dispose();
 					}
@@ -340,7 +342,7 @@ public class EditImageAllgemein_GUI extends JFrame {
 											+ Image.image.getDesc()+"\"");
 
 							
-							EditImageTechnisch_GUI ea = new EditImageTechnisch_GUI();
+							EditImageTechnisch_GUI ea = new EditImageTechnisch_GUI(c);
 							ea.setVisible(true);
 							dispose();
 
@@ -434,11 +436,11 @@ public class EditImageAllgemein_GUI extends JFrame {
 		mnNewMenu_Info.addMouseListener(new MouseAdapter() {
 			@Override
 			public void mouseClicked(MouseEvent arg0) {
-				JOptionPane.showMessageDialog(null, HELP_MESSAGE, "Hilfe zu dieser Oberfläche", JOptionPane.INFORMATION_MESSAGE);
+				JOptionPane.showMessageDialog(c, HELP_MESSAGE, "Hilfe zu dieser Oberfläche", JOptionPane.INFORMATION_MESSAGE);
 			}
 		});
 		menuBar.add(mnNewMenu_Info);
-
+		c = this;
 	}
 
 	public void initData() {
@@ -481,7 +483,7 @@ public class EditImageAllgemein_GUI extends JFrame {
 		} catch (TException e) {
 			// TODO Auto-generated catch block
 			e.printStackTrace();
-			JOptionPane.showMessageDialog(null,
+			JOptionPane.showMessageDialog(c,
 					e.getCause() + "\n" + e.getStackTrace(), "Debug-Message",
 					JOptionPane.ERROR_MESSAGE);
 		}
@@ -496,7 +498,7 @@ public class EditImageAllgemein_GUI extends JFrame {
 		} else {
 			JOptionPane
 					.showMessageDialog(
-							null,
+							c,
 							"Der Imagename darf keine Leer- oder Sonderzeichen enthalten.",
 							"Unerlaubte Zeichen",
 							JOptionPane.INFORMATION_MESSAGE);
@@ -520,7 +522,7 @@ public class EditImageAllgemein_GUI extends JFrame {
 		} else {
 			JOptionPane
 			.showMessageDialog(
-					null,
+					c,
 					"Bitte geben Sie alle notwendigen Daten an!",
 					"Daten unvollständig",
 					JOptionPane.INFORMATION_MESSAGE);
@@ -536,7 +538,7 @@ public class EditImageAllgemein_GUI extends JFrame {
 		if (textAreadesc.getText().length() >= MAX_DESCRIPTION_LENGTH) {
 			descriptionLengthOK=false;
 			JOptionPane
-			.showMessageDialog(null,
+			.showMessageDialog(c,
 					"Die Beschreibung darf max 254 Zeichen enthalten. Aktuell enthält sie "+textAreadesc.getText().length()+".",
 					"Beschreibung zu umfangreich",
 					JOptionPane.ERROR_MESSAGE);
diff --git a/dozentenmodul/src/main/java/gui/image/EditImageTechnisch_GUI.java b/dozentenmodul/src/main/java/gui/image/EditImageTechnisch_GUI.java
index cf9cb9d2..7f97601e 100644
--- a/dozentenmodul/src/main/java/gui/image/EditImageTechnisch_GUI.java
+++ b/dozentenmodul/src/main/java/gui/image/EditImageTechnisch_GUI.java
@@ -4,6 +4,7 @@ import gui.intro.About_GUI;
 import gui.intro.MainMenue_GUI;
 
 import java.awt.Color;
+import java.awt.Component;
 import java.awt.FlowLayout;
 import java.awt.Font;
 import java.awt.SystemColor;
@@ -66,6 +67,7 @@ public class EditImageTechnisch_GUI extends JFrame {
 	JComboBox<String> comboBox;
 	ThriftConnection con = new ThriftConnection();
 	Client client = models.Client.clientcon.getClient();
+	Component c = null;
 	private static final String HELP_MESSAGE =	"<html><div align = \"center\">" +
 		   	"Bearbeiten Sie hier die technischen Angaben zu Ihrem Image, die Sie beim Erzeugen des Images hinterlegt haben.<br />" +
 		   	"Wenn sich die technischen Anforderungen an Ihr Image geändert haben, müssen Sie es nicht erneut hochladen,<br />" +
@@ -75,7 +77,7 @@ public class EditImageTechnisch_GUI extends JFrame {
 	/**
 	 * Create the dialog.
 	 */
-	public EditImageTechnisch_GUI() {
+	public EditImageTechnisch_GUI(Component formerGUI) {
 		addWindowListener(new WindowAdapter() {
 			@Override
 			public void windowClosing(WindowEvent arg0) {
@@ -100,7 +102,7 @@ public class EditImageTechnisch_GUI extends JFrame {
 		setTitle("bwLehrpool Suite - Image bearbeiten");
 		// Zentriert das Fenster
 		setBounds(0, 0, 603, 722);
-		GuiOrganizer.centerGUI(this);
+		setLocationRelativeTo(formerGUI);
 
 		getContentPane().setLayout(null);
 		{
@@ -199,7 +201,7 @@ public class EditImageTechnisch_GUI extends JFrame {
 				// Macht dieses Fenster unsichtbar und das vorhergehende Fenster
 				// sichtbar
 				EditImageTechnisch_GUI.this.setVisible(false);
-				MainMenue_GUI main = new MainMenue_GUI();
+				MainMenue_GUI main = new MainMenue_GUI(c);
 				main.setVisible(true);
 			}
 		});
@@ -313,7 +315,7 @@ public class EditImageTechnisch_GUI extends JFrame {
 						Image.image.setLicensed(chckbxIsLicensed.isSelected());
 						Image.image.setOS(comboBox.getSelectedItem().toString());
 						// oeffnet das vorherige Fenster
-						EditImageAllgemein_GUI ei = new EditImageAllgemein_GUI();
+						EditImageAllgemein_GUI ei = new EditImageAllgemein_GUI(c);
 						ei.setVisible(true);
 						dispose();
 					}
@@ -340,7 +342,7 @@ public class EditImageTechnisch_GUI extends JFrame {
 									", CPU: " + Image.image.getCpu() +
 									",  RAM: " + Image.image.getRam());
 						// oeffnet das naechste Fenster
-						PermissionEditImage_GUI ea=new PermissionEditImage_GUI();
+						PermissionEditImage_GUI ea=new PermissionEditImage_GUI(c);
 						ea.setVisible(true);
 						dispose();
 
@@ -410,10 +412,10 @@ public class EditImageTechnisch_GUI extends JFrame {
 		mnNewMenu_Info.addMouseListener(new MouseAdapter() {
 			@Override
 			public void mouseClicked(MouseEvent arg0) {
-				JOptionPane.showMessageDialog(null, HELP_MESSAGE, "Hilfe zu dieser Oberfläche", JOptionPane.INFORMATION_MESSAGE);
+				JOptionPane.showMessageDialog(c, HELP_MESSAGE, "Hilfe zu dieser Oberfläche", JOptionPane.INFORMATION_MESSAGE);
 			}
 		});
 		menuBar.add(mnNewMenu_Info);
-
+		c = this;
 	}
 }
diff --git a/dozentenmodul/src/main/java/gui/image/FTPCreateUploader_GUI.java b/dozentenmodul/src/main/java/gui/image/FTPCreateUploader_GUI.java
index a4300f97..9d65d42e 100644
--- a/dozentenmodul/src/main/java/gui/image/FTPCreateUploader_GUI.java
+++ b/dozentenmodul/src/main/java/gui/image/FTPCreateUploader_GUI.java
@@ -2,6 +2,7 @@ package gui.image;
 
 import java.awt.BorderLayout;
 import java.awt.Color;
+import java.awt.Component;
 import java.awt.FlowLayout;
 import java.awt.Font;
 import java.awt.SystemColor;
@@ -14,7 +15,6 @@ import java.awt.event.WindowEvent;
 import java.beans.PropertyChangeEvent;
 import java.beans.PropertyChangeListener;
 import java.io.File;
-import java.io.IOException;
 import java.net.URI;
 import java.net.URISyntaxException;
 import java.text.DateFormat;
@@ -47,18 +47,14 @@ import models.person;
 
 import org.apache.log4j.Logger;
 import org.apache.thrift.TException;
-import org.ini4j.InvalidFileFormatException;
-import org.ini4j.Wini;
 
 import server.generated.Server.Client;
 import thrift.ThriftConnection;
-import util.GuiOrganizer;
 import util.OpenLinks;
+import config.Config;
 import ftp.UploadTask;
 import gui.intro.About_GUI;
-import gui.intro.Login_GUI;
 import gui.intro.MainMenue_GUI;
-import config.Config;
 
 @SuppressWarnings("serial")
 public class FTPCreateUploader_GUI extends JFrame implements
@@ -103,7 +99,7 @@ public class FTPCreateUploader_GUI extends JFrame implements
 	int progress = 0; // progress of upload
 	private boolean isCurrentlyLoading = false; // currently up or downloading
 												// file
-
+	Component c = null;
 	private boolean isAborted = false; //down- or upload was manually aborted 
 	
 	private static final String HELP_MESSAGE =	"<html><div align = \"center\">" +
@@ -119,7 +115,7 @@ public class FTPCreateUploader_GUI extends JFrame implements
 	/**
 	 * Create the frame.
 	 */
-	public FTPCreateUploader_GUI() {
+	public FTPCreateUploader_GUI(final Component formerGUI) {
 
 		final Object[] options = { "Beenden", "Abbrechen" };
 
@@ -132,7 +128,7 @@ public class FTPCreateUploader_GUI extends JFrame implements
 					// check if user wants to quit.
 					int choice = JOptionPane
 							.showOptionDialog(
-									null,
+									c,
 									"Aktuell ist ein Upload aktiv. Wollen Sie diesen Abbrechen und das Programm beenden?",
 									"Upload aktiv",
 									JOptionPane.YES_NO_CANCEL_OPTION,
@@ -157,14 +153,14 @@ public class FTPCreateUploader_GUI extends JFrame implements
 			}// end window closing
 		});
 		setResizable(false);
-
+		
 		try {
 			UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
 		} catch (ClassNotFoundException | InstantiationException
 				| IllegalAccessException | UnsupportedLookAndFeelException e) {
 			// TODO Auto-generated catch block
 			e.printStackTrace();
-			JOptionPane.showMessageDialog(null,
+			JOptionPane.showMessageDialog(c,
 					e.getCause() + "\n" + e.getStackTrace(), "Debug-Message",
 					JOptionPane.ERROR_MESSAGE);
 		}
@@ -176,7 +172,8 @@ public class FTPCreateUploader_GUI extends JFrame implements
 		setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
 
 		setBounds(0, 0, 603, 722);
-		GuiOrganizer.centerGUI(this);
+		setLocationRelativeTo(formerGUI);
+		
 
 		getContentPane().setLayout(new BorderLayout());
 		contentPanel.setBackground(SystemColor.menu);
@@ -409,9 +406,8 @@ public class FTPCreateUploader_GUI extends JFrame implements
 						}
 						// save configuration
 						Config.store();
-
 						dispose();
-						MainMenue_GUI m = new MainMenue_GUI();
+						MainMenue_GUI m = new MainMenue_GUI(c);
 						m.setVisible(true);
 						if (taskrun == true) {
 							try {
@@ -421,7 +417,7 @@ public class FTPCreateUploader_GUI extends JFrame implements
 								// TODO Auto-generated catch block
 								e1.printStackTrace();
 								JOptionPane.showMessageDialog(
-										null,
+										c,
 										e1.getCause() + "\n"
 												+ e1.getStackTrace(),
 										"Debug-Message",
@@ -439,7 +435,7 @@ public class FTPCreateUploader_GUI extends JFrame implements
 						if (isCurrentlyLoading() == true) {
 							int choice = JOptionPane
 									.showOptionDialog(
-											null,
+											c,
 											"Nicht abgeschlossene Uploads werden beendet. Trotzdem zurück gehen?",
 											"Warnung",
 											JOptionPane.YES_NO_CANCEL_OPTION,
@@ -456,25 +452,32 @@ public class FTPCreateUploader_GUI extends JFrame implements
 								task.cancel(true);
 								// not loading files, go back one page
 								dispose();
-								PermissionCreateImage_GUI m = new PermissionCreateImage_GUI();
-								m.setVisible(true);
+								PermissionCreateImage_GUI m = new PermissionCreateImage_GUI(c);
+								//m.setVisible(true);
 
 							}// end if choice
 						} else {
+							
 
 							int selectedOption = JOptionPane
 									.showConfirmDialog(
-											null,
+											c,
 											"<html>Achtung: Alle Änderungen gehen verloren!<br />Klicken Sie auf fertigstellen, wenn Sie die Änderungen dauerhaft speichern möchten.<br /><br />Möchten Sie jetzt abbrechen und zurück?</html>",
 											"Abbrechen und zurück",
 											JOptionPane.YES_NO_OPTION);
 							if (selectedOption == JOptionPane.YES_OPTION) {
+								System.out.println("CreateUploader X:"+formerGUI.getLocation().getX());
+								System.out.println("CreateUploader X:"+formerGUI.getLocation().getY());
 								dispose();
-								PermissionCreateImage_GUI m = new PermissionCreateImage_GUI();
+								PermissionCreateImage_GUI m = new PermissionCreateImage_GUI(formerGUI);
+								m.setLocationRelativeTo(formerGUI);
+								
 								m.setVisible(true);
+								
 							} else {
 								// for actions if "no" is selected. tbd.
 							}
+							
 
 						}// end else
 					}// end action
@@ -541,11 +544,12 @@ public class FTPCreateUploader_GUI extends JFrame implements
 		mnNewMenu_Info.addMouseListener(new MouseAdapter() {
 			@Override
 			public void mouseClicked(MouseEvent arg0) {
-				JOptionPane.showMessageDialog(null, HELP_MESSAGE, "Hilfe zu dieser Oberfläche", JOptionPane.INFORMATION_MESSAGE);
+				JOptionPane.showMessageDialog(c, HELP_MESSAGE, "Hilfe zu dieser Oberfläche", JOptionPane.INFORMATION_MESSAGE);
 			}
 		});
 		menuBar.add(mnNewMenu_Info);
-
+		
+		c = this;
 	}
 
 	private void buttonUploadActionPerformed(ActionEvent event) {
@@ -565,7 +569,7 @@ public class FTPCreateUploader_GUI extends JFrame implements
 			// TODO Auto-generated catch block
 			LOGGER.error("Konnte vom Satellit keinen FTP-User erhalten!");
 			e.printStackTrace();
-			JOptionPane.showMessageDialog(null,
+			JOptionPane.showMessageDialog(c,
 					"Konnte vom Satellit keinen FTP-User erhalten!",
 					"Debug-Message", JOptionPane.ERROR_MESSAGE);
 		}
@@ -698,7 +702,7 @@ public class FTPCreateUploader_GUI extends JFrame implements
 		} catch (TException e) {
 			// TODO Auto-generated catch block
 			e.printStackTrace();
-			JOptionPane.showMessageDialog(null,
+			JOptionPane.showMessageDialog(c,
 					e.getCause() + "\n" + e.getStackTrace(), "Debug-Message",
 					JOptionPane.ERROR_MESSAGE);
 			return false;
diff --git a/dozentenmodul/src/main/java/gui/image/FTPEditDownloader_GUI.java b/dozentenmodul/src/main/java/gui/image/FTPEditDownloader_GUI.java
index 34150b21..bd4c0d32 100644
--- a/dozentenmodul/src/main/java/gui/image/FTPEditDownloader_GUI.java
+++ b/dozentenmodul/src/main/java/gui/image/FTPEditDownloader_GUI.java
@@ -2,6 +2,7 @@ package gui.image;
 
 import java.awt.BorderLayout;
 import java.awt.Color;
+import java.awt.Component;
 import java.awt.Cursor;
 import java.awt.FlowLayout;
 import java.awt.Font;
@@ -93,6 +94,7 @@ public class FTPEditDownloader_GUI extends JFrame implements
 	JButton btnDownloadStarten = new JButton("Download starten");
 	JButton btnDownloadStoppen = new JButton("Download abbrechen");
 	private JLabel lblAnleitung;
+	Component c = null;
 	private boolean isCurrentlyLoading = false; // currently up or downloading
 												// file
 	private boolean isAborted = false; // down- or upload was manually aborted
@@ -104,7 +106,7 @@ public class FTPEditDownloader_GUI extends JFrame implements
 	/**
 	 * Create the frame.
 	 */
-	public FTPEditDownloader_GUI() {
+	public FTPEditDownloader_GUI(Component formerGUI) {
 
 		final Object[] options = { "Beenden", "Abbrechen" };
 
@@ -115,7 +117,7 @@ public class FTPEditDownloader_GUI extends JFrame implements
 					// check if user wants to quit.
 					int choice = JOptionPane
 							.showOptionDialog(
-									null,
+									c,
 									"Aktuell ist ein Download aktiv. Wollen Sie diesen Abbrechen und das Programm beenden?",
 									"Upload aktiv",
 									JOptionPane.YES_NO_CANCEL_OPTION,
@@ -154,7 +156,7 @@ public class FTPEditDownloader_GUI extends JFrame implements
 		setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
 
 		setBounds(0, 0, 603, 722);
-		GuiOrganizer.centerGUI(this);
+		setLocationRelativeTo(formerGUI);
 
 		getContentPane().setLayout(new BorderLayout());
 		contentPanel.setBackground(SystemColor.menu);
@@ -440,7 +442,7 @@ public class FTPEditDownloader_GUI extends JFrame implements
 						if (isCurrentlyLoading() == true) {
 							int choice = JOptionPane
 									.showOptionDialog(
-											null,
+											c,
 											"Nicht abgeschlossene Uploads werden beendet. Trotzdem zurück gehen?",
 											"Warnung",
 											JOptionPane.YES_NO_CANCEL_OPTION,
@@ -457,7 +459,7 @@ public class FTPEditDownloader_GUI extends JFrame implements
 								}
 
 								// go back one page
-								SearchEditImage_GUI se = new SearchEditImage_GUI();
+								SearchEditImage_GUI se = new SearchEditImage_GUI(c);
 								se.setVisible(true);
 								dispose();
 							}// end choice
@@ -465,7 +467,7 @@ public class FTPEditDownloader_GUI extends JFrame implements
 						} else {
 
 							// go back one page
-							SearchEditImage_GUI se = new SearchEditImage_GUI();
+							SearchEditImage_GUI se = new SearchEditImage_GUI(c);
 							se.setVisible(true);
 							dispose();
 
@@ -492,12 +494,12 @@ public class FTPEditDownloader_GUI extends JFrame implements
 		mnNewMenu_Info.addMouseListener(new MouseAdapter() {
 			@Override
 			public void mouseClicked(MouseEvent arg0) {
-				JOptionPane.showMessageDialog(null, HELP_MESSAGE, "Hilfe zu dieser Oberfläche", JOptionPane.INFORMATION_MESSAGE);
+				JOptionPane.showMessageDialog(c, HELP_MESSAGE, "Hilfe zu dieser Oberfläche", JOptionPane.INFORMATION_MESSAGE);
 			}
 		});
 		menuBar.add(mnNewMenu_Info);
 
-	
+		c = this;
 
 	}
 
@@ -519,7 +521,7 @@ public class FTPEditDownloader_GUI extends JFrame implements
 		} catch (TException e) {
 			// TODO Auto-generated catch block
 			e.printStackTrace();
-			JOptionPane.showMessageDialog(null,
+			JOptionPane.showMessageDialog(c,
 					e.getCause() + "\n" + e.getStackTrace(), "Debug-Message",
 					JOptionPane.ERROR_MESSAGE);
 		}
diff --git a/dozentenmodul/src/main/java/gui/image/FTPEditUploader_GUI.java b/dozentenmodul/src/main/java/gui/image/FTPEditUploader_GUI.java
index 0f07acd3..89be34ca 100644
--- a/dozentenmodul/src/main/java/gui/image/FTPEditUploader_GUI.java
+++ b/dozentenmodul/src/main/java/gui/image/FTPEditUploader_GUI.java
@@ -2,6 +2,7 @@ package gui.image;
 
 import java.awt.BorderLayout;
 import java.awt.Color;
+import java.awt.Component;
 import java.awt.FlowLayout;
 import java.awt.Font;
 import java.awt.SystemColor;
@@ -102,6 +103,7 @@ public class FTPEditUploader_GUI extends JFrame implements
 	private boolean isCurrentlyLoading = false; // currently up or downloading
 												// file
 	private boolean isAborted = false; // down- or upload was manually aborted
+	Component c = null;
 	private static final String HELP_MESSAGE =	"<html><div align = \"center\">" +
 		   	"Laden Sie hier Ihre bearbeitete .vmdk-Datei hoch, die dann als virtuelles Labor geladen werden kann.<br />" +
 		   	"Wichtig ist, dass Sie zum Schluss auf \"Fertigstellen\" klicken, damit die Daten übernommen werden.<br />" +
@@ -112,7 +114,7 @@ public class FTPEditUploader_GUI extends JFrame implements
 	/**
 	 * Create the frame.
 	 */
-	public FTPEditUploader_GUI() {
+	public FTPEditUploader_GUI(Component formerGUI) {
 
 		final Object[] options = { "Beenden", "Abbrechen" };
 
@@ -124,7 +126,7 @@ public class FTPEditUploader_GUI extends JFrame implements
 					// check if user wants to quit.
 					int choice = JOptionPane
 							.showOptionDialog(
-									null,
+									c,
 									"Aktuell ist ein Upload aktiv. Wollen Sie diesen Abbrechen und das Programm beenden?",
 									"Upload aktiv",
 									JOptionPane.YES_NO_CANCEL_OPTION,
@@ -165,7 +167,7 @@ public class FTPEditUploader_GUI extends JFrame implements
 		setTitle("Dozentenmodul - Image bearbeiten");
 
 		setBounds(0, 0, 603, 722);
-		GuiOrganizer.centerGUI(this);
+		setLocationRelativeTo(formerGUI);
 
 		getContentPane().setLayout(new BorderLayout());
 		contentPanel.setBackground(SystemColor.menu);
@@ -384,7 +386,7 @@ public class FTPEditUploader_GUI extends JFrame implements
 						Config.store();
 
 						dispose();
-						MainMenue_GUI m = new MainMenue_GUI();
+						MainMenue_GUI m = new MainMenue_GUI(c);
 						m.setVisible(true);
 
 						if (taskrun == true) {
@@ -395,7 +397,7 @@ public class FTPEditUploader_GUI extends JFrame implements
 								// TODO Auto-generated catch block
 								e1.printStackTrace();
 								JOptionPane.showMessageDialog(
-										null,
+										c,
 										e1.getCause() + "\n"
 												+ e1.getStackTrace(),
 										"Debug-Message",
@@ -413,7 +415,7 @@ public class FTPEditUploader_GUI extends JFrame implements
 						if (isCurrentlyLoading() == true) {
 							int choice = JOptionPane
 									.showOptionDialog(
-											null,
+											c,
 											"Nicht abgeschlossene Uploads werden beendet. Trotzdem zurück gehen?",
 											"Warnung",
 											JOptionPane.YES_NO_CANCEL_OPTION,
@@ -430,21 +432,21 @@ public class FTPEditUploader_GUI extends JFrame implements
 								task.cancel(true);
 								// not loading files, go back one page
 								dispose();
-								PermissionEditImage_GUI ei = new PermissionEditImage_GUI();
+								PermissionEditImage_GUI ei = new PermissionEditImage_GUI(c);
 								ei.setVisible(true);
 
 							}// end if coice
 						} else {
 
 
-							int selectedOption = JOptionPane.showConfirmDialog(null, 
+							int selectedOption = JOptionPane.showConfirmDialog(c, 
 	                                  "<html>Achtung: Alle Änderungen gehen verloren!<br />Klicken Sie auf fertigstellen, wenn Sie die Änderungen dauerhaft speichern möchten.<br /><br />Möchten Sie jetzt abbrechen und zurück?</html>", 
 	                                  "Abbrechen und zurück", 
 	                                  JOptionPane.YES_NO_OPTION); 
 							if (selectedOption == JOptionPane.YES_OPTION) 
 							{
 								dispose();							
-								PermissionCreateImage_GUI m = new PermissionCreateImage_GUI();
+								PermissionEditImage_GUI m = new PermissionEditImage_GUI(c);
 								m.setVisible(true);
 							}
 							else
@@ -526,7 +528,7 @@ public class FTPEditUploader_GUI extends JFrame implements
 		mnNewMenu_Info.addMouseListener(new MouseAdapter() {
 			@Override
 			public void mouseClicked(MouseEvent arg0) {
-				JOptionPane.showMessageDialog(null, HELP_MESSAGE, "Hilfe zu dieser Oberfläche", JOptionPane.INFORMATION_MESSAGE);
+				JOptionPane.showMessageDialog(c, HELP_MESSAGE, "Hilfe zu dieser Oberfläche", JOptionPane.INFORMATION_MESSAGE);
 			}
 		});
 		menuBar.add(mnNewMenu_Info);
@@ -555,7 +557,7 @@ public class FTPEditUploader_GUI extends JFrame implements
 		} catch (TException e) {
 			// TODO Auto-generated catch block
 			e.printStackTrace();
-			JOptionPane.showMessageDialog(null,
+			JOptionPane.showMessageDialog(c,
 					"Konnte vom Satelliten keine FTP-User erhalten!",
 					"Debug-Message", JOptionPane.ERROR_MESSAGE);
 		}
@@ -671,7 +673,7 @@ public class FTPEditUploader_GUI extends JFrame implements
 			e.printStackTrace();
 			JOptionPane
 					.showMessageDialog(
-							null,
+							c,
 							"Konnte die Metadaten des Images nicht in die Datenbank speichern!",
 							"Debug-Message", JOptionPane.ERROR_MESSAGE);
 			return false;
diff --git a/dozentenmodul/src/main/java/gui/image/FTPSearchDownloader_GUI.java b/dozentenmodul/src/main/java/gui/image/FTPSearchDownloader_GUI.java
index 49098677..17981c0e 100644
--- a/dozentenmodul/src/main/java/gui/image/FTPSearchDownloader_GUI.java
+++ b/dozentenmodul/src/main/java/gui/image/FTPSearchDownloader_GUI.java
@@ -2,6 +2,7 @@ package gui.image;
 
 import java.awt.BorderLayout;
 import java.awt.Color;
+import java.awt.Component;
 import java.awt.FlowLayout;
 import java.awt.Font;
 import java.awt.SystemColor;
@@ -90,6 +91,7 @@ public class FTPSearchDownloader_GUI extends JFrame implements
 	JButton btnMainMenu = new JButton("Hauptmenü");
 	JButton btnDownloadStoppen = new JButton("Download abbrechen");
 	private JLabel lblAnleitung;
+	Component c = null;
 	private boolean isCurrentlyLoading = false; // currently up or downloading
 												// file
 	private boolean isAborted = false; // down- or upload was manually aborted
@@ -101,7 +103,7 @@ public class FTPSearchDownloader_GUI extends JFrame implements
 	/**
 	 * Create the frame.
 	 */
-	public FTPSearchDownloader_GUI() {
+	public FTPSearchDownloader_GUI(Component formerGUI) {
 
 		final Object[] options = { "Beenden", "Abbrechen" };
 
@@ -112,7 +114,7 @@ public class FTPSearchDownloader_GUI extends JFrame implements
 					// check if user wants to quit.
 					int choice = JOptionPane
 							.showOptionDialog(
-									null,
+									c,
 									"Aktuell ist ein Download aktiv. Wollen Sie diesen Abbrechen und das Programm beenden?",
 									"Upload aktiv",
 									JOptionPane.YES_NO_CANCEL_OPTION,
@@ -153,7 +155,7 @@ public class FTPSearchDownloader_GUI extends JFrame implements
 		// Aktion die beim Schliessen durchgefuehrt werden soll
 		setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
 		setBounds(0, 0, 603, 722);
-		GuiOrganizer.centerGUI(this);
+		setLocationRelativeTo(formerGUI);
 
 		getContentPane().setLayout(new BorderLayout());
 		contentPanel.setBackground(SystemColor.menu);
@@ -450,7 +452,7 @@ public class FTPSearchDownloader_GUI extends JFrame implements
 						if (isCurrentlyLoading() == true) {
 							int choice = JOptionPane
 									.showOptionDialog(
-											null,
+											c,
 											"Nicht abgeschlossene Uploads werden beendet. Trotzdem zurück gehen?",
 											"Warnung",
 											JOptionPane.YES_NO_CANCEL_OPTION,
@@ -466,14 +468,14 @@ public class FTPSearchDownloader_GUI extends JFrame implements
 									e1.printStackTrace();
 								}
 								// go back one page
-								SearchImage_GUI si = new SearchImage_GUI();
+								SearchImage_GUI si = new SearchImage_GUI(c);
 								si.setVisible(true);
 								dispose();
 							}// end choice
 
 						} else {
 							// go back one page
-							SearchImage_GUI si = new SearchImage_GUI();
+							SearchImage_GUI si = new SearchImage_GUI(c);
 							si.setVisible(true);
 							dispose();
 						}// end else
@@ -491,7 +493,7 @@ public class FTPSearchDownloader_GUI extends JFrame implements
 					Config.setLastDownloadPath(lblPath.getText());
 					Config.store();
 
-					MainMenue_GUI mm = new MainMenue_GUI();
+					MainMenue_GUI mm = new MainMenue_GUI(c);
 					mm.setVisible(true);
 					dispose();
 				}
@@ -504,11 +506,11 @@ public class FTPSearchDownloader_GUI extends JFrame implements
 		mnNewMenu_Info.addMouseListener(new MouseAdapter() {
 			@Override
 			public void mouseClicked(MouseEvent arg0) {
-				JOptionPane.showMessageDialog(null, HELP_MESSAGE, "Hilfe zu dieser Oberfläche", JOptionPane.INFORMATION_MESSAGE);
+				JOptionPane.showMessageDialog(c, HELP_MESSAGE, "Hilfe zu dieser Oberfläche", JOptionPane.INFORMATION_MESSAGE);
 			}
 		});
 		menuBar.add(mnNewMenu_Info);
-		
+		c = this;
 		setVisible(true);
 
 	}
@@ -531,7 +533,7 @@ public class FTPSearchDownloader_GUI extends JFrame implements
 		} catch (TException e) {
 			// TODO Auto-generated catch block
 			e.printStackTrace();
-			JOptionPane.showMessageDialog(null,
+			JOptionPane.showMessageDialog(c,
 					e.getCause() + "\n" + e.getStackTrace(), "Debug-Message",
 					JOptionPane.ERROR_MESSAGE);
 		}
diff --git a/dozentenmodul/src/main/java/gui/image/PermissionCreateImage_GUI.java b/dozentenmodul/src/main/java/gui/image/PermissionCreateImage_GUI.java
index 63323969..21ad40f5 100644
--- a/dozentenmodul/src/main/java/gui/image/PermissionCreateImage_GUI.java
+++ b/dozentenmodul/src/main/java/gui/image/PermissionCreateImage_GUI.java
@@ -63,7 +63,7 @@ import org.apache.thrift.TException;
 import server.generated.Server.Client;
 import server.generated.Person;
 import models.person;
-import util.GuiOrganizer;
+
 import util.OpenLinks;
 
 @SuppressWarnings("serial")
@@ -77,6 +77,7 @@ public class PermissionCreateImage_GUI extends JFrame {
 	private Class[] classes;
 	Object[] titles = { "Name", "Read", "Write", "Link", "Admin", "userID" };
 	private List<Person> map = null;
+	Component c = null;
 	// Map<String,String> ogUsers = new HashMap();
 
 	final DefaultTableModel model = new DefaultTableModel(titles, 0) {
@@ -118,7 +119,7 @@ public class PermissionCreateImage_GUI extends JFrame {
 			"für andere Benutzer festlegen und ist somit wie der Besitzer zu betrachten." +
 			"</div></html>";
 
-	public PermissionCreateImage_GUI() {
+	public PermissionCreateImage_GUI(Component formerGUI) {
 		addWindowListener(new WindowAdapter() {
 			@Override
 			public void windowClosing(WindowEvent arg0) {
@@ -137,7 +138,17 @@ public class PermissionCreateImage_GUI extends JFrame {
 		setTitle("bwLehrpool Suite - Image erzeugen");
 
 		setBounds(0, 0, 603, 722);
-		GuiOrganizer.centerGUI(this);
+		setLocationRelativeTo(formerGUI);
+		
+		
+		//
+		//System.out.println("formergui X oben:"+formerGUI.getLocation().getX());
+		//System.out.println("formergui Y oben:"+formerGUI.getLocation().getY());
+		
+		System.out.println("this oben: "+this.getLocation().getX());
+		System.out.println("this oben: "+this.getLocation().getY());
+		
+		System.out.println("------------------------------------------");
 
 		getContentPane().setLayout(null);
 		{
@@ -321,7 +332,7 @@ public class PermissionCreateImage_GUI extends JFrame {
 			public void mouseClicked(MouseEvent arg0) {
 
 				PermissionCreateImage_GUI.this.setVisible(false);
-				MainMenue_GUI main = new MainMenue_GUI();
+				MainMenue_GUI main = new MainMenue_GUI(c);
 				main.setVisible(true);
 			}
 		});
@@ -429,7 +440,7 @@ public class PermissionCreateImage_GUI extends JFrame {
 					public void actionPerformed(ActionEvent e) {
 
 
-						CreateImageTechnisch_GUI ci = new CreateImageTechnisch_GUI();
+						CreateImageTechnisch_GUI ci = new CreateImageTechnisch_GUI(c);
 						ci.setVisible(true);
 						dispose();
 					}
@@ -446,7 +457,7 @@ public class PermissionCreateImage_GUI extends JFrame {
 						saveTableToList();
 
 						Image.image.setShareMode(comboBox_1.getSelectedIndex());
-						FTPCreateUploader_GUI ea = new FTPCreateUploader_GUI();
+						FTPCreateUploader_GUI ea = new FTPCreateUploader_GUI(c);
 						ea.setVisible(true);
 						dispose();
 
@@ -528,11 +539,26 @@ public class PermissionCreateImage_GUI extends JFrame {
 		mnNewMenu_Info.addMouseListener(new MouseAdapter() {
 			@Override
 			public void mouseClicked(MouseEvent arg0) {
-				JOptionPane.showMessageDialog(null, HELP_MESSAGE, "Hilfe zu dieser Oberfläche", JOptionPane.INFORMATION_MESSAGE);
+				JOptionPane.showMessageDialog(c, HELP_MESSAGE, "Hilfe zu dieser Oberfläche", JOptionPane.INFORMATION_MESSAGE);
 			}
 		});
 		menuBar.add(mnNewMenu_Info);
-
+		c = this;
+		//System.out.println("formergui unten X:"+formerGUI.getLocation().getX());
+		//System.out.println("formergui unten Y:"+formerGUI.getLocation().getY());
+		
+		//System.out.println("this unten X: "+this.getLocation().getX());
+		//System.out.println("this unten Y: "+this.getLocation().getY());
+		
+		
+		this.setLocationRelativeTo(formerGUI);
+		
+		//this.setLocation(1238, 53);
+		
+		this.setVisible(true);
+		
+		//System.out.println("this on screen unten X: "+this.getLocationOnScreen().getX());
+		//System.out.println("this on screen unten Y: "+this.getLocationOnScreen().getY());
 	}
 
 	class MyItemListener1 implements ItemListener {
diff --git a/dozentenmodul/src/main/java/gui/image/PermissionEditImage_GUI.java b/dozentenmodul/src/main/java/gui/image/PermissionEditImage_GUI.java
index 0f94c499..a8ddaf03 100644
--- a/dozentenmodul/src/main/java/gui/image/PermissionEditImage_GUI.java
+++ b/dozentenmodul/src/main/java/gui/image/PermissionEditImage_GUI.java
@@ -3,7 +3,6 @@ package gui.image;
 import gui.intro.About_GUI;
 import gui.intro.MainMenue_GUI;
 
-import java.awt.Checkbox;
 import java.awt.Color;
 import java.awt.Component;
 import java.awt.FlowLayout;
@@ -15,17 +14,13 @@ import java.awt.event.ItemEvent;
 import java.awt.event.ItemListener;
 import java.awt.event.MouseAdapter;
 import java.awt.event.MouseEvent;
-import java.awt.event.MouseListener;
 import java.awt.event.WindowAdapter;
 import java.awt.event.WindowEvent;
-import java.io.IOException;
 import java.net.URI;
 import java.net.URISyntaxException;
 
 import javax.swing.AbstractButton;
-import javax.swing.ButtonGroup;
 import javax.swing.DefaultComboBoxModel;
-import javax.swing.Icon;
 import javax.swing.JButton;
 import javax.swing.JCheckBox;
 import javax.swing.JComboBox;
@@ -36,32 +31,24 @@ import javax.swing.JMenuBar;
 import javax.swing.JMenuItem;
 import javax.swing.JOptionPane;
 import javax.swing.JPanel;
+import javax.swing.JScrollPane;
 import javax.swing.JSeparator;
+import javax.swing.JTable;
+import javax.swing.JTextField;
 import javax.swing.JTextPane;
+import javax.swing.ScrollPaneConstants;
 import javax.swing.UIManager;
 import javax.swing.UnsupportedLookAndFeelException;
 import javax.swing.border.EmptyBorder;
 import javax.swing.border.TitledBorder;
-import javax.swing.table.DefaultTableCellRenderer;
 import javax.swing.table.DefaultTableModel;
-import javax.swing.table.JTableHeader;
-import javax.swing.table.TableCellEditor;
 import javax.swing.table.TableCellRenderer;
 import javax.swing.table.TableColumn;
-import javax.swing.table.TableColumnModel;
 
 import models.Image;
 import models.Links;
 import util.GuiOrganizer;
 import util.OpenLinks;
-import javax.swing.JTable;
-import javax.swing.JScrollPane;
-import javax.swing.ScrollPaneConstants;
-import javax.swing.JTextField;
-
-import org.eclipse.jface.viewers.CheckboxCellEditor;
-
-import java.awt.Choice;
 
 @SuppressWarnings("serial")
 public class PermissionEditImage_GUI extends JFrame {
@@ -71,6 +58,7 @@ public class PermissionEditImage_GUI extends JFrame {
 	private JTable table;
 	private Class[] classes;
 	Object[] titles = { "Name", "Read", "Write", "Link","Admin"};
+	Component c = null;
 
 	final DefaultTableModel model = new DefaultTableModel(titles, 0) {
 
@@ -104,7 +92,7 @@ public class PermissionEditImage_GUI extends JFrame {
 			"für andere Benutzer festlegen und ist somit wie der Besitzer zu betrachten." +
 			"</div></html>";
 
-	public PermissionEditImage_GUI() {
+	public PermissionEditImage_GUI(Component formerGUI) {
 		addWindowListener(new WindowAdapter() {
 			@Override
 			public void windowClosing(WindowEvent arg0) {
@@ -123,7 +111,7 @@ public class PermissionEditImage_GUI extends JFrame {
 		setTitle("bwLehrpool Suite - Image erzeugen");
 
 		setBounds(0, 0, 603, 722);
-		GuiOrganizer.centerGUI(this);
+		setLocationRelativeTo(formerGUI);
 
 		getContentPane().setLayout(null);
 		{
@@ -232,7 +220,7 @@ public class PermissionEditImage_GUI extends JFrame {
 			public void mouseClicked(MouseEvent arg0) {
 
 				PermissionEditImage_GUI.this.setVisible(false);
-				MainMenue_GUI main = new MainMenue_GUI();
+				MainMenue_GUI main = new MainMenue_GUI(c);
 				main.setVisible(true);
 			}
 		});
@@ -338,7 +326,7 @@ public class PermissionEditImage_GUI extends JFrame {
 					public void actionPerformed(ActionEvent e) {
 
 						//EditImageFreigabe_GUI sr = new EditImageFreigabe_GUI();
-						EditImageTechnisch_GUI ei = new EditImageTechnisch_GUI();
+						EditImageTechnisch_GUI ei = new EditImageTechnisch_GUI(c);
 						ei.setVisible(true);
 						dispose();
 					}
@@ -353,7 +341,7 @@ public class PermissionEditImage_GUI extends JFrame {
 					public void actionPerformed(ActionEvent e) {
 						
 						Image.image.setShareMode(comboBox_1.getSelectedIndex());
-						FTPEditUploader_GUI ea = new FTPEditUploader_GUI();
+						FTPEditUploader_GUI ea = new FTPEditUploader_GUI(c);
 						ea.setVisible(true);
 						dispose();
 
@@ -435,11 +423,11 @@ public class PermissionEditImage_GUI extends JFrame {
 		mnNewMenu_Info.addMouseListener(new MouseAdapter() {
 			@Override
 			public void mouseClicked(MouseEvent arg0) {
-				JOptionPane.showMessageDialog(null, HELP_MESSAGE, "Hilfe zu dieser Oberfläche", JOptionPane.INFORMATION_MESSAGE);
+				JOptionPane.showMessageDialog(c, HELP_MESSAGE, "Hilfe zu dieser Oberfläche", JOptionPane.INFORMATION_MESSAGE);
 			}
 		});
 		menuBar.add(mnNewMenu_Info);
-
+		c = this;
 	}
 
 	class MyItemListener1 implements ItemListener {
diff --git a/dozentenmodul/src/main/java/gui/image/SearchEditImage_GUI.java b/dozentenmodul/src/main/java/gui/image/SearchEditImage_GUI.java
index a0116e40..f295a1c4 100644
--- a/dozentenmodul/src/main/java/gui/image/SearchEditImage_GUI.java
+++ b/dozentenmodul/src/main/java/gui/image/SearchEditImage_GUI.java
@@ -4,6 +4,7 @@ import gui.intro.About_GUI;
 import gui.intro.MainMenue_GUI;
 
 import java.awt.Color;
+import java.awt.Component;
 import java.awt.FlowLayout;
 import java.awt.Font;
 import java.awt.SystemColor;
@@ -96,6 +97,7 @@ public class SearchEditImage_GUI extends JFrame {
 	JTable tablemyImages;
 	boolean activeSearch = false;
 	private JTextField textFieldName;
+	Component c = null;
 	String[] titles = { "Name", "Lizenzpflichtig", "OS", "Veranstaltung",
 			"Verantwortlicher", "Letztes Update", "ID", "Version", "Template" };// Angezeigt
 																				// werden
@@ -141,7 +143,7 @@ public class SearchEditImage_GUI extends JFrame {
 	/**
 	 * Create the dialog.
 	 */
-	public SearchEditImage_GUI() {
+	public SearchEditImage_GUI(Component formerGUI) {
 		addWindowListener(new WindowAdapter() {
 			@Override
 			public void windowClosing(WindowEvent arg0) {
@@ -238,7 +240,7 @@ public class SearchEditImage_GUI extends JFrame {
 		setTitle("bwLehrpool Suite - Image bearbeiten");
 		// Zentriert das Fenster in die Bildmitte
 		setBounds(0, 0, 918, 722);
-		GuiOrganizer.centerGUI(this);
+		setLocationRelativeTo(formerGUI);
 
 		final DefaultTableModel model = new DefaultTableModel(titles, 0);
 
@@ -335,7 +337,7 @@ public class SearchEditImage_GUI extends JFrame {
 		} catch (TException e2) {
 			// TODO Auto-generated catch block
 			e2.printStackTrace();
-			JOptionPane.showMessageDialog(null,
+			JOptionPane.showMessageDialog(c,
 					"Konnte die Liste der Betriebssysteme vom Server nicht abfragen!", "Fehlermeldung",
 					JOptionPane.ERROR_MESSAGE);
 		}
@@ -375,7 +377,7 @@ public class SearchEditImage_GUI extends JFrame {
 				// oeffnet das Hauuetmenue
 
 				SearchEditImage_GUI.this.setVisible(false);
-				MainMenue_GUI main = new MainMenue_GUI();
+				MainMenue_GUI main = new MainMenue_GUI(c);
 				main.setVisible(true);
 			}
 		});
@@ -426,7 +428,7 @@ public class SearchEditImage_GUI extends JFrame {
 
 						Image.image.setVersion(imageversion);
 
-						FTPEditDownloader_GUI ea = new FTPEditDownloader_GUI();
+						FTPEditDownloader_GUI ea = new FTPEditDownloader_GUI(c);
 						ea.setVisible(true);
 						dispose();
 						/*	}
@@ -518,7 +520,7 @@ public class SearchEditImage_GUI extends JFrame {
 				} else {
 					JOptionPane
 							.showMessageDialog(
-									null,
+									c,
 									"Bitte wählen Sie ein Image für den Download aus",
 									"Message", JOptionPane.INFORMATION_MESSAGE);
 				}
@@ -568,7 +570,7 @@ public class SearchEditImage_GUI extends JFrame {
 					public void actionPerformed(ActionEvent e) {
 						// oeffnet das Hauptmenue
 
-						MainMenue_GUI main = new MainMenue_GUI();
+						MainMenue_GUI main = new MainMenue_GUI(c);
 						main.setVisible(true);
 						dispose();
 					}
@@ -605,7 +607,7 @@ public class SearchEditImage_GUI extends JFrame {
 
 								Image.image.setVersion(imageversion);
 
-								EditImageAllgemein_GUI ea = new EditImageAllgemein_GUI();
+								EditImageAllgemein_GUI ea = new EditImageAllgemein_GUI(c);
 								ea.setVisible(true);
 								dispose();
 							}
@@ -876,11 +878,12 @@ public class SearchEditImage_GUI extends JFrame {
 		mnNewMenu_Info.addMouseListener(new MouseAdapter() {
 			@Override
 			public void mouseClicked(MouseEvent arg0) {
-				JOptionPane.showMessageDialog(null, HELP_MESSAGE, "Hilfe zu dieser Oberfläche", JOptionPane.INFORMATION_MESSAGE);
+				JOptionPane.showMessageDialog(c, HELP_MESSAGE, "Hilfe zu dieser Oberfläche", JOptionPane.INFORMATION_MESSAGE);
 			}
 		});
 		menuBar.add(mnNewMenu_Info);
 
+		c = this;
 	}
 
 	// Initiale Beffuelung eines Table models
@@ -919,7 +922,7 @@ public class SearchEditImage_GUI extends JFrame {
 		} catch (TException | ParseException e1) {
 			// TODO Auto-generated catch block
 			e1.printStackTrace();
-			JOptionPane.showMessageDialog(null,
+			JOptionPane.showMessageDialog(c,
 					e1.getCause() + "\n" + e1.getStackTrace(), "Debug-Message",
 					JOptionPane.ERROR_MESSAGE);
 		}
diff --git a/dozentenmodul/src/main/java/gui/image/SearchImage_GUI.java b/dozentenmodul/src/main/java/gui/image/SearchImage_GUI.java
index a51cdfe0..97128318 100644
--- a/dozentenmodul/src/main/java/gui/image/SearchImage_GUI.java
+++ b/dozentenmodul/src/main/java/gui/image/SearchImage_GUI.java
@@ -4,6 +4,7 @@ import gui.intro.About_GUI;
 import gui.intro.MainMenue_GUI;
 
 import java.awt.Color;
+import java.awt.Component;
 import java.awt.FlowLayout;
 import java.awt.Font;
 import java.awt.SystemColor;
@@ -97,6 +98,7 @@ public class SearchImage_GUI extends JFrame {
 	private JTextField textFieldName;
 	JTabbedPane tabbedPane;
 	boolean activeSearch = false;
+	Component c = null;
 	String[] titles = { "Name", "Lizenzpflichtig", "OS", "Veranstaltung",
 			"Verantwortlicher", "Letztes Update", "ID", "Version", "Template" }; // Angezeigt
 																					// werden
@@ -145,7 +147,7 @@ public class SearchImage_GUI extends JFrame {
 	/**
 	 * Create the dialog.
 	 */
-	public SearchImage_GUI() {
+	public SearchImage_GUI(Component formerGUI) {
 		addWindowListener(new WindowAdapter() {
 			@Override
 			public void windowClosing(WindowEvent arg0) {
@@ -241,7 +243,7 @@ public class SearchImage_GUI extends JFrame {
 		setTitle("bwLehrpool Suite - Image suchen");
 		// Zentriert das Fenster in die Bildmitte
 		setBounds(0, 0, 918, 722);
-		GuiOrganizer.centerGUI(this);
+		setLocationRelativeTo(formerGUI);
 
 		final DefaultTableModel model = new DefaultTableModel(titles, 0);
 
@@ -339,7 +341,7 @@ public class SearchImage_GUI extends JFrame {
 		} catch (TException e2) {
 			// TODO Auto-generated catch block
 			e2.printStackTrace();
-			JOptionPane.showMessageDialog(null,
+			JOptionPane.showMessageDialog(c,
 					e2.getCause() + "\n" + e2.getStackTrace(), "Debug-Message",
 					JOptionPane.ERROR_MESSAGE);
 		}
@@ -378,7 +380,7 @@ public class SearchImage_GUI extends JFrame {
 				// oeffnet das Hauuetmenue
 
 				SearchImage_GUI.this.setVisible(false);
-				MainMenue_GUI main = new MainMenue_GUI();
+				MainMenue_GUI main = new MainMenue_GUI(c);
 				main.setVisible(true);
 			}
 		});
@@ -556,7 +558,7 @@ public class SearchImage_GUI extends JFrame {
 
 						Image.image.setVersion(imageversion);
 						SearchImage_GUI.this.setVisible(false);
-						FTPSearchDownloader_GUI down = new FTPSearchDownloader_GUI();
+						FTPSearchDownloader_GUI down = new FTPSearchDownloader_GUI(c);
 						down.setVisible(true);
 
 					}
@@ -591,7 +593,7 @@ public class SearchImage_GUI extends JFrame {
 						Image.image.setVersion(imageversion);
 
 						SearchImage_GUI.this.setVisible(false);
-						FTPSearchDownloader_GUI down = new FTPSearchDownloader_GUI();
+						FTPSearchDownloader_GUI down = new FTPSearchDownloader_GUI(c);
 						down.setVisible(true);
 					}
 				} else if (tabbedPane.getSelectedIndex() == 2) {
@@ -635,12 +637,12 @@ public class SearchImage_GUI extends JFrame {
 							Image.image.setVersion(imageversion);
 
 							SearchImage_GUI.this.setVisible(false);
-							FTPSearchDownloader_GUI down = new FTPSearchDownloader_GUI();
+							FTPSearchDownloader_GUI down = new FTPSearchDownloader_GUI(c);
 							down.setVisible(true);
 						} else {
 							JOptionPane
 									.showMessageDialog(
-											null,
+											c,
 											"Sie haben keine Berechtigung fremde Images herunterzuladen.",
 											"Message",
 											JOptionPane.INFORMATION_MESSAGE);
@@ -654,7 +656,7 @@ public class SearchImage_GUI extends JFrame {
 					//
 					JOptionPane
 							.showMessageDialog(
-									null,
+									c,
 									"Bitte wählen Sie ein Image für den Download aus",
 									"Message", JOptionPane.INFORMATION_MESSAGE);
 				}
@@ -674,7 +676,7 @@ public class SearchImage_GUI extends JFrame {
 					public void actionPerformed(ActionEvent e) {
 						// oeffnet das Hauptmenue
 
-						MainMenue_GUI main = new MainMenue_GUI();
+						MainMenue_GUI main = new MainMenue_GUI(c);
 						main.setVisible(true);
 						dispose();
 					}
@@ -879,10 +881,11 @@ public class SearchImage_GUI extends JFrame {
 		mnNewMenu_Info.addMouseListener(new MouseAdapter() {
 			@Override
 			public void mouseClicked(MouseEvent arg0) {
-				JOptionPane.showMessageDialog(null, HELP_MESSAGE, "Hilfe zu dieser Oberfläche", JOptionPane.INFORMATION_MESSAGE);
+				JOptionPane.showMessageDialog(c, HELP_MESSAGE, "Hilfe zu dieser Oberfläche", JOptionPane.INFORMATION_MESSAGE);
 			}
 		});
 		menuBar.add(mnNewMenu_Info);
+		c = this;
 
 	}
 
@@ -919,7 +922,7 @@ public class SearchImage_GUI extends JFrame {
 		} catch (TException | ParseException e1) {
 			// TODO Auto-generated catch block
 			e1.printStackTrace();
-			JOptionPane.showMessageDialog(null,
+			JOptionPane.showMessageDialog(c,
 					e1.getCause() + "\n" + e1.getStackTrace(), "Debug-Message",
 					JOptionPane.ERROR_MESSAGE);
 		}
diff --git a/dozentenmodul/src/main/java/gui/intro/About_GUI.java b/dozentenmodul/src/main/java/gui/intro/About_GUI.java
index 85de07b9..420a7235 100644
--- a/dozentenmodul/src/main/java/gui/intro/About_GUI.java
+++ b/dozentenmodul/src/main/java/gui/intro/About_GUI.java
@@ -40,7 +40,7 @@ public class About_GUI extends JFrame {
 				| IllegalAccessException | UnsupportedLookAndFeelException e) {
 			// TODO Auto-generated catch block
 			e.printStackTrace();
-			JOptionPane.showMessageDialog(null,
+			JOptionPane.showMessageDialog(this,
 					e.getCause() + "\n" + e.getStackTrace(), "Debug-Message ",
 					JOptionPane.ERROR_MESSAGE);
 		}
diff --git a/dozentenmodul/src/main/java/gui/intro/BillOfRights_GUI.java b/dozentenmodul/src/main/java/gui/intro/BillOfRights_GUI.java
index 1ae73608..a4fa2db7 100644
--- a/dozentenmodul/src/main/java/gui/intro/BillOfRights_GUI.java
+++ b/dozentenmodul/src/main/java/gui/intro/BillOfRights_GUI.java
@@ -10,8 +10,6 @@ import java.awt.event.MouseAdapter;
 import java.awt.event.MouseEvent;
 import java.awt.event.WindowAdapter;
 import java.awt.event.WindowEvent;
-import java.io.File;
-import java.io.IOException;
 import java.net.URI;
 import java.net.URISyntaxException;
 
@@ -22,7 +20,6 @@ import javax.swing.JLabel;
 import javax.swing.JMenu;
 import javax.swing.JMenuBar;
 import javax.swing.JMenuItem;
-import javax.swing.JOptionPane;
 import javax.swing.JPanel;
 import javax.swing.JScrollPane;
 import javax.swing.JSeparator;
@@ -36,13 +33,9 @@ import javax.swing.event.ChangeEvent;
 import javax.swing.event.ChangeListener;
 
 import models.Links;
-
-import org.ini4j.InvalidFileFormatException;
-import org.ini4j.Wini;
-
-import config.Config;
 import util.GuiOrganizer;
 import util.OpenLinks;
+import config.Config;
 
 
 
diff --git a/dozentenmodul/src/main/java/gui/intro/Login_GUI.java b/dozentenmodul/src/main/java/gui/intro/Login_GUI.java
index 42fa9409..3f0b99c5 100644
--- a/dozentenmodul/src/main/java/gui/intro/Login_GUI.java
+++ b/dozentenmodul/src/main/java/gui/intro/Login_GUI.java
@@ -1,6 +1,7 @@
 package gui.intro;
 
 import java.awt.Color;
+import java.awt.Component;
 import java.awt.Image;
 import java.awt.SystemColor;
 import java.awt.event.ActionEvent;
@@ -36,8 +37,6 @@ import thrift.ThriftConnection;
 import util.GuiOrganizer;
 import util.ResourceLoader;
 import config.Config;
-import java.awt.event.MouseAdapter;
-import java.awt.event.MouseEvent;
 
 @SuppressWarnings("serial")
 public class Login_GUI extends JFrame {
@@ -54,6 +53,7 @@ public class Login_GUI extends JFrame {
 	boolean isClientReturnedCorrectly = false;
 	JCheckBox chckbxBenutzernameSpeichern;
 	private static final String HELP_MESSAGE = "";
+	Component c = null;
 
 	/**
 	 * Create the frame.
@@ -170,8 +170,10 @@ public class Login_GUI extends JFrame {
 
 		BtnLogin.setBounds(292, 252, 237, 23);
 		contentPane.add(BtnLogin);
-
-		// GuiOrganizer.centerGUI(this);
+		
+		GuiOrganizer.centerGUI(this);
+		c = this;
+		
 	}// end LoginGUI()
 
 	// Versuche den Benutzer einzuloggen
@@ -284,7 +286,7 @@ public class Login_GUI extends JFrame {
 			} else {
 
 				// oeffne das Hauptmenue
-				MainMenue_GUI main = new MainMenue_GUI();
+				MainMenue_GUI main = new MainMenue_GUI(c);
 				main.setVisible(true);
 				setVisible(false);
 			}
@@ -308,7 +310,7 @@ public class Login_GUI extends JFrame {
 		lblConnectionInfo.setForeground(color);
 		lblConnectionInfo.setText(shortMessage);
 		if (longMessage != null)
-			JOptionPane.showMessageDialog(null, longMessage,
+			JOptionPane.showMessageDialog(c, longMessage,
 					"Anmeldung fehlgeschlagen", JOptionPane.ERROR_MESSAGE);
 	}
 
diff --git a/dozentenmodul/src/main/java/gui/intro/MainMenue_GUI.java b/dozentenmodul/src/main/java/gui/intro/MainMenue_GUI.java
index d4bb2fd8..fe49ef06 100644
--- a/dozentenmodul/src/main/java/gui/intro/MainMenue_GUI.java
+++ b/dozentenmodul/src/main/java/gui/intro/MainMenue_GUI.java
@@ -9,6 +9,7 @@ import gui.lecture.DeleteLecture_GUI;
 import gui.lecture.EditLectureSearch_GUI;
 import gui.lecture.SearchLecture_GUI;
 
+import java.awt.Component;
 import java.awt.FlowLayout;
 import java.awt.Font;
 import java.awt.Rectangle;
@@ -76,6 +77,8 @@ public class MainMenue_GUI extends JFrame {
 	JRadioButton rdbtnLectureSearch;
 	private final ButtonGroup buttonGroup = new ButtonGroup();
 	private JMenuItem mntmAbout;
+	Component c = null;
+	
 	
 	private static final String HELP_MESSAGE = "<html><div align=\"center\">" +
 											   " " +	
@@ -87,7 +90,7 @@ public class MainMenue_GUI extends JFrame {
 	/**
 	 * Create the dialog.
 	 */
-	public MainMenue_GUI() {
+	public MainMenue_GUI(Component formerGUI) {
 
 		addWindowListener(new WindowAdapter() {
 			@Override
@@ -105,7 +108,7 @@ public class MainMenue_GUI extends JFrame {
 		setTitle("bwLehrpool Suite - Connected Server: "
 				+ SessionData.session.getServerAdress());
 		setBounds(0, 0, 603, 722);
-		//this.setLocationRelativeTo(formerGUI);
+		this.setLocationRelativeTo(formerGUI);
 
 		getContentPane().setLayout(null);
 		{
@@ -374,42 +377,42 @@ public class MainMenue_GUI extends JFrame {
 
 						// Images
 						if (rdbtnImageNew.isSelected() == true) {
-							CreateImageAllgemein_GUI sr = new CreateImageAllgemein_GUI();
+							CreateImageAllgemein_GUI sr = new CreateImageAllgemein_GUI(c);
 							sr.setVisible(true);
 							dispose();
 						} else if (rdbtnImageEdit.isSelected() == true) {
-							SearchEditImage_GUI si = new SearchEditImage_GUI();
+							SearchEditImage_GUI si = new SearchEditImage_GUI(c);
 							si.setVisible(true);
 							dispose();
 						} else if (rdbtnImageDelete.isSelected() == true) {
-							DeleteImage_GUI di = new DeleteImage_GUI();
+							DeleteImage_GUI di = new DeleteImage_GUI(c);
 							di.setVisible(true);
 							dispose();
 						} else if (rdbtnImageSearchDownload.isSelected() == true) {
 							// SearchMethodLecture_GUI sm = new
 							// SearchMethodLecture_GUI();
-							SearchImage_GUI si = new SearchImage_GUI();
+							SearchImage_GUI si = new SearchImage_GUI(c);
 							si.setVisible(true);
 							dispose();
 							// Lectures
 						} else if (rdbtnLectureNew.isSelected() == true) {
-							CreateLectureAllgemein_GUI av = new CreateLectureAllgemein_GUI();
+							CreateLectureAllgemein_GUI av = new CreateLectureAllgemein_GUI(c);
 							av.setVisible(true);
 							dispose();
 						} else if (rdbtnLectureEdit.isSelected() == true) {
-							EditLectureSearch_GUI el = new EditLectureSearch_GUI();
+							EditLectureSearch_GUI el = new EditLectureSearch_GUI(c);
 							el.setVisible(true);
 							dispose();
 						} else if (rdbtnLectureDelete.isSelected() == true) {
-							DeleteLecture_GUI dl = new DeleteLecture_GUI();
+							DeleteLecture_GUI dl = new DeleteLecture_GUI(c);
 							dl.setVisible(true);
 							dispose();
 						} else if (rdbtnLectureSearch.isSelected() == true) {
-							SearchLecture_GUI sl = new SearchLecture_GUI();
+							SearchLecture_GUI sl = new SearchLecture_GUI(c);
 							sl.setVisible(true);
 							dispose();
 						} else
-							JOptionPane.showMessageDialog(null,
+							JOptionPane.showMessageDialog(c,
 									"Keine Auswahl getroffen.",
 									"Auswahl fehlt", JOptionPane.ERROR_MESSAGE);
 					}
@@ -491,7 +494,7 @@ public class MainMenue_GUI extends JFrame {
 		});
 		mnNewMenu_1.add(mntmAbout);
 		
-
+		c = this;
 	}// end main
 
 	/**
diff --git a/dozentenmodul/src/main/java/gui/intro/VmWareLink_GUI.java b/dozentenmodul/src/main/java/gui/intro/VmWareLink_GUI.java
index b52709c0..2d50fd8b 100644
--- a/dozentenmodul/src/main/java/gui/intro/VmWareLink_GUI.java
+++ b/dozentenmodul/src/main/java/gui/intro/VmWareLink_GUI.java
@@ -1,7 +1,8 @@
 package gui.intro;
 
 
-import java.awt.Desktop;
+import java.awt.Color;
+import java.awt.Component;
 import java.awt.FlowLayout;
 import java.awt.Font;
 import java.awt.SystemColor;
@@ -11,8 +12,6 @@ import java.awt.event.MouseAdapter;
 import java.awt.event.MouseEvent;
 import java.awt.event.WindowAdapter;
 import java.awt.event.WindowEvent;
-import java.io.File;
-import java.io.IOException;
 import java.net.URI;
 import java.net.URISyntaxException;
 
@@ -23,7 +22,6 @@ import javax.swing.JLabel;
 import javax.swing.JMenu;
 import javax.swing.JMenuBar;
 import javax.swing.JMenuItem;
-import javax.swing.JOptionPane;
 import javax.swing.JPanel;
 import javax.swing.JSeparator;
 import javax.swing.JTextPane;
@@ -34,14 +32,9 @@ import javax.swing.event.ChangeEvent;
 import javax.swing.event.ChangeListener;
 
 import models.Links;
-
-import org.ini4j.InvalidFileFormatException;
-import org.ini4j.Wini;
-
-import config.Config;
 import util.GuiOrganizer;
 import util.OpenLinks;
-import java.awt.Color;
+import config.Config;
 
 
 @SuppressWarnings("serial")
@@ -51,7 +44,7 @@ public class VmWareLink_GUI extends JFrame {
 	String[] result;
 	JCheckBox chckbxNewCheckBox;
 	private JButton btnWindows;
-	
+	Component c = null;
 
 	/**
 	 * Create the dialog.
@@ -196,7 +189,7 @@ public class VmWareLink_GUI extends JFrame {
 				JButton cancelButton = new JButton("Weiter");
 				cancelButton.addActionListener(new ActionListener() {
 					public void actionPerformed(ActionEvent e) {
-						MainMenue_GUI ea=new MainMenue_GUI();
+						MainMenue_GUI ea=new MainMenue_GUI(c);
 						ea.setVisible(true);
 						dispose();
 					}
@@ -272,7 +265,7 @@ public class VmWareLink_GUI extends JFrame {
 			}
 		}
 		
-		
+		c = this;
 
 	}//end constructor
 }// end class
diff --git a/dozentenmodul/src/main/java/gui/lecture/CreateLectureAllgemein_GUI.java b/dozentenmodul/src/main/java/gui/lecture/CreateLectureAllgemein_GUI.java
index 376369d1..a46431bc 100644
--- a/dozentenmodul/src/main/java/gui/lecture/CreateLectureAllgemein_GUI.java
+++ b/dozentenmodul/src/main/java/gui/lecture/CreateLectureAllgemein_GUI.java
@@ -4,6 +4,7 @@ import gui.intro.About_GUI;
 import gui.intro.MainMenue_GUI;
 
 import java.awt.Color;
+import java.awt.Component;
 import java.awt.FlowLayout;
 import java.awt.Font;
 import java.awt.ScrollPane;
@@ -66,6 +67,7 @@ public class CreateLectureAllgemein_GUI extends JFrame {
 	JDateChooser dateChooserstart;
 	Date startDate = new Date();
 	Date endDate;
+	Component c = null;
 	private boolean descriptionLengthOK = false; // description may not be
 													// longer than
 													// MAX_DESCRIPTION_LENGTH
@@ -84,7 +86,7 @@ public class CreateLectureAllgemein_GUI extends JFrame {
 	/**
 	 * Create the dialog.
 	 */
-	public CreateLectureAllgemein_GUI() {
+	public CreateLectureAllgemein_GUI(Component formerGUI) {
 		addWindowListener(new WindowAdapter() {
 			@Override
 			public void windowClosing(WindowEvent arg0) {
@@ -107,7 +109,7 @@ public class CreateLectureAllgemein_GUI extends JFrame {
 		}
 		setTitle("bwLehrpool Suite - Veranstaltung erzeugen");
 		setBounds(0, 0, 603, 722);
-		GuiOrganizer.centerGUI(this);
+		setLocationRelativeTo(formerGUI);
 
 		getContentPane().setLayout(null);
 		{
@@ -214,7 +216,7 @@ public class CreateLectureAllgemein_GUI extends JFrame {
 			public void mouseClicked(MouseEvent arg0) {
 
 				CreateLectureAllgemein_GUI.this.setVisible(false);
-				MainMenue_GUI main = new MainMenue_GUI();
+				MainMenue_GUI main = new MainMenue_GUI(c);
 				main.setVisible(true);
 			}
 		});
@@ -389,7 +391,7 @@ public class CreateLectureAllgemein_GUI extends JFrame {
 						Image.image.setImagename(txtFldVeranstaltungsname
 								.getText());
 
-						MainMenue_GUI sr = new MainMenue_GUI();
+						MainMenue_GUI sr = new MainMenue_GUI(c);
 						sr.setVisible(true);
 						dispose();
 					}
@@ -409,7 +411,7 @@ public class CreateLectureAllgemein_GUI extends JFrame {
 							isDateOrderCorrect = false;
 							JOptionPane
 									.showMessageDialog(
-											null,
+											c,
 											"Das End-Datum liegt vor dem Start-Datum. Bitte ändern.",
 											"Datum fehlerhaft",
 											JOptionPane.INFORMATION_MESSAGE);
@@ -422,7 +424,7 @@ public class CreateLectureAllgemein_GUI extends JFrame {
 						if (dateChooserend.getDate().after(endDate)) {
 							// Datum zu weit weg
 							isDateMaxLifeTimeCorrect = false;
-							JOptionPane.showMessageDialog(null,
+							JOptionPane.showMessageDialog(c,
 									"Das End-Datum liegt zu weit in der Zukunft. Erlaubt ist maximal:\n"
 											+ endDate, "Datum fehlerhaft",
 									JOptionPane.INFORMATION_MESSAGE);
@@ -440,7 +442,7 @@ public class CreateLectureAllgemein_GUI extends JFrame {
 							isAllInformationReady = false;
 							JOptionPane
 									.showMessageDialog(
-											null,
+											c,
 											"Bitte geben Sie einen Veranstaltungsnamen und eine Beschreibung ein.",
 											"Datum fehlerhaft",
 											JOptionPane.INFORMATION_MESSAGE);
@@ -472,7 +474,7 @@ public class CreateLectureAllgemein_GUI extends JFrame {
 							Image.image.setImagename(txtFldVeranstaltungsname
 									.getText());
 
-							PermissionCreateLecture_GUI ev = new PermissionCreateLecture_GUI();
+							PermissionCreateLecture_GUI ev = new PermissionCreateLecture_GUI(c);
 							ev.setVisible(true);
 							dispose();
 						}
@@ -551,11 +553,12 @@ public class CreateLectureAllgemein_GUI extends JFrame {
 		mnNewMenu_Info.addMouseListener(new MouseAdapter() {
 			@Override
 			public void mouseClicked(MouseEvent arg0) {
-				JOptionPane.showMessageDialog(null, HELP_MESSAGE, "Hilfe zu dieser Oberfläche", JOptionPane.INFORMATION_MESSAGE);
+				JOptionPane.showMessageDialog(c, HELP_MESSAGE, "Hilfe zu dieser Oberfläche", JOptionPane.INFORMATION_MESSAGE);
 			}
 		});
 		menuBar.add(mnNewMenu_Info);
 
+		c = this;
 	}
 
 	public Date addDays(Date date, int days) {
@@ -571,7 +574,7 @@ public class CreateLectureAllgemein_GUI extends JFrame {
 		// max length is 254 chars
 		if (description.getText().length() >= MAX_DESCRIPTION_LENGTH) {
 			descriptionLengthOK = false;
-			JOptionPane.showMessageDialog(null,
+			JOptionPane.showMessageDialog(c,
 					"Die Beschreibung darf max 254 Zeichen enthalten. Aktuell enthält sie "
 							+ description.getText().length() + ".",
 					"Beschreibung zu umfangreich",
diff --git a/dozentenmodul/src/main/java/gui/lecture/CreateLectureLink_GUI.java b/dozentenmodul/src/main/java/gui/lecture/CreateLectureLink_GUI.java
index b874b9c2..5205c41c 100644
--- a/dozentenmodul/src/main/java/gui/lecture/CreateLectureLink_GUI.java
+++ b/dozentenmodul/src/main/java/gui/lecture/CreateLectureLink_GUI.java
@@ -4,6 +4,7 @@ import gui.intro.About_GUI;
 import gui.intro.MainMenue_GUI;
 
 import java.awt.Color;
+import java.awt.Component;
 import java.awt.FlowLayout;
 import java.awt.Font;
 import java.awt.SystemColor;
@@ -92,6 +93,7 @@ public class CreateLectureLink_GUI extends JFrame {
 	JTable tableCoopImages = new JTable();
 	JTable tablePublicVorlagen = new JTable();
 	boolean activeSearch=false;
+	Component c = null;
 	private JTextField textFieldName;
 	String[] titles = { "Image-Name", "Lizenzpflichtig", "OS", "Veranstaltung",
 			"Verantwortlicher", "Letztes Update", "ID", "Version","Template" };
@@ -129,7 +131,7 @@ public class CreateLectureLink_GUI extends JFrame {
 	/**
 	 * Create the dialog.
 	 */
-	public CreateLectureLink_GUI() {
+	public CreateLectureLink_GUI(Component formerGUI) {
 		addWindowListener(new WindowAdapter() {
 			@Override
 			public void windowClosing(WindowEvent arg0) {
@@ -218,7 +220,7 @@ public class CreateLectureLink_GUI extends JFrame {
 		}
 		setTitle("bwLehrpool Suite - Veranstaltung erzeugen");
 		setBounds(0, 0, 918, 722);
-		GuiOrganizer.centerGUI(this);
+		setLocationRelativeTo(formerGUI);
 
 		
 		final DefaultTableModel model = new DefaultTableModel(titles, 0);
@@ -313,7 +315,7 @@ public class CreateLectureLink_GUI extends JFrame {
 		} catch (TException e) {
 			// TODO Auto-generated catch block
 			e.printStackTrace();
-			JOptionPane.showMessageDialog(null,
+			JOptionPane.showMessageDialog(c,
 					e.getCause()+"\n"+e.getStackTrace(),
 					"Debug-Message", JOptionPane.ERROR_MESSAGE);
 		}
@@ -349,7 +351,7 @@ public class CreateLectureLink_GUI extends JFrame {
 			public void mouseClicked(MouseEvent arg0) {
 
 				CreateLectureLink_GUI.this.setVisible(false);
-				MainMenue_GUI main = new MainMenue_GUI();
+				MainMenue_GUI main = new MainMenue_GUI(c);
 				main.setVisible(true);
 			}
 		});
@@ -544,7 +546,7 @@ public class CreateLectureLink_GUI extends JFrame {
 				cancelButton.addActionListener(new ActionListener() {
 					public void actionPerformed(ActionEvent e) {
 						
-						PermissionCreateLecture_GUI eVAG = new PermissionCreateLecture_GUI();
+						PermissionCreateLecture_GUI eVAG = new PermissionCreateLecture_GUI(c);
 						eVAG.setVisible(true);
 						dispose();
 					}
@@ -592,23 +594,23 @@ public class CreateLectureLink_GUI extends JFrame {
 								client.writeLectureRights(Lecture.lecture.getName(), person.verantwortlicher.getUsername(), person.verantwortlicher.getName(), person.verantwortlicher.getVorname(), person.verantwortlicher.getEMail(), person.verantwortlicher.getHochschule(), person.verantwortlicher.getRole());
 								JOptionPane
 										.showMessageDialog(
-												null,
+												c,
 												"Ihre Veranstaltung wurde erfolgreich angelegt. Sie kehren nun zum Hauptmenü zurück.",
 												"Veranstaltung angelegt",
 												JOptionPane.INFORMATION_MESSAGE);
 								// zurueck zum Menue
-								MainMenue_GUI m = new MainMenue_GUI();
+								MainMenue_GUI m = new MainMenue_GUI(c);
 								m.setVisible(true);
 							} catch (TException e1) {
 								// TODO Auto-generated catch block
 								e1.printStackTrace();
 								JOptionPane
 										.showMessageDialog(
-												null,
+												c,
 												"Beim Anlegen Ihrer Veranstaltung ist ein Fehler aufgetreten.",
 												"Error",
 												JOptionPane.ERROR_MESSAGE);
-								JOptionPane.showMessageDialog(null,
+								JOptionPane.showMessageDialog(c,
 										e1.getCause()+"\n"+e1.getStackTrace(),
 										"Debug-Message", JOptionPane.ERROR_MESSAGE);
 							}
@@ -646,23 +648,23 @@ public class CreateLectureLink_GUI extends JFrame {
 								client.writeLectureRights(Lecture.lecture.getName(), person.verantwortlicher.getUsername(), person.verantwortlicher.getName(), person.verantwortlicher.getVorname(), person.verantwortlicher.getEMail(), person.verantwortlicher.getHochschule(), person.verantwortlicher.getRole());
 								JOptionPane
 										.showMessageDialog(
-												null,
+												c,
 												"Ihre Veranstaltung wurde erfolgreich angelegt. Sie kehren nun zum Hauptmenü zurück.",
 												"Veranstaltung angelegt",
 												JOptionPane.INFORMATION_MESSAGE);
 								// zurueck zum Menue
-								MainMenue_GUI m = new MainMenue_GUI();
+								MainMenue_GUI m = new MainMenue_GUI(c);
 								m.setVisible(true);
 							} catch (TException e1) {
 								// TODO Auto-generated catch block
 								e1.printStackTrace();
 								JOptionPane
 										.showMessageDialog(
-												null,
+												c,
 												"Beim Anlegen Ihrer Veranstaltung ist ein Fehler aufgetreten.",
 												"Error",
 												JOptionPane.ERROR_MESSAGE);
-								JOptionPane.showMessageDialog(null,
+								JOptionPane.showMessageDialog(c,
 										e1.getCause()+"\n"+e1.getStackTrace(),
 										"Debug-Message", JOptionPane.ERROR_MESSAGE);
 							}
@@ -700,23 +702,23 @@ public class CreateLectureLink_GUI extends JFrame {
 								client.writeLectureRights(Lecture.lecture.getName(), person.verantwortlicher.getUsername(), person.verantwortlicher.getName(), person.verantwortlicher.getVorname(), person.verantwortlicher.getEMail(), person.verantwortlicher.getHochschule(), person.verantwortlicher.getRole());
 								JOptionPane
 										.showMessageDialog(
-												null,
+												c,
 												"Ihre Veranstaltung wurde erfolgreich angelegt. Sie kehren nun zum Hauptmenü zurück.",
 												"Veranstaltung angelegt",
 												JOptionPane.INFORMATION_MESSAGE);
 								// zurueck zum Menue
-								MainMenue_GUI m = new MainMenue_GUI();
+								MainMenue_GUI m = new MainMenue_GUI(c);
 								m.setVisible(true);
 							} catch (TException e1) {
 								// TODO Auto-generated catch block
 								e1.printStackTrace();
 								JOptionPane
 										.showMessageDialog(
-												null,
+												c,
 												"Beim Anlegen Ihrer Veranstaltung ist ein Fehler aufgetreten.",
 												"Error",
 												JOptionPane.ERROR_MESSAGE);
-								JOptionPane.showMessageDialog(null,
+								JOptionPane.showMessageDialog(c,
 										e1.getCause()+"\n"+e1.getStackTrace(),
 										"Debug-Message", JOptionPane.ERROR_MESSAGE);
 							}
@@ -726,7 +728,7 @@ public class CreateLectureLink_GUI extends JFrame {
 						}   
 						else {
 							// nothing selected
-							JOptionPane.showMessageDialog(null,
+							JOptionPane.showMessageDialog(c,
 									"Bitte wählen Sie ein Image aus.",
 									"Image Auswahl",
 									JOptionPane.INFORMATION_MESSAGE);
@@ -934,11 +936,12 @@ public class CreateLectureLink_GUI extends JFrame {
 		mnNewMenu_Info.addMouseListener(new MouseAdapter() {
 			@Override
 			public void mouseClicked(MouseEvent arg0) {
-				JOptionPane.showMessageDialog(null, HELP_MESSAGE, "Hilfe zu dieser Oberfläche", JOptionPane.INFORMATION_MESSAGE);
+				JOptionPane.showMessageDialog(c, HELP_MESSAGE, "Hilfe zu dieser Oberfläche", JOptionPane.INFORMATION_MESSAGE);
 			}
 		});
 		menuBar.add(mnNewMenu_Info);
 
+		c = this;
 	}
 
 	// Initiale Beffuelung eines Table models
diff --git a/dozentenmodul/src/main/java/gui/lecture/DeleteLecture_GUI.java b/dozentenmodul/src/main/java/gui/lecture/DeleteLecture_GUI.java
index 014b9f71..fa03a7ff 100644
--- a/dozentenmodul/src/main/java/gui/lecture/DeleteLecture_GUI.java
+++ b/dozentenmodul/src/main/java/gui/lecture/DeleteLecture_GUI.java
@@ -5,6 +5,7 @@ import gui.intro.Login_GUI;
 import gui.intro.MainMenue_GUI;
 
 import java.awt.Color;
+import java.awt.Component;
 import java.awt.FlowLayout;
 import java.awt.Font;
 import java.awt.SystemColor;
@@ -100,6 +101,7 @@ public class DeleteLecture_GUI extends JFrame {
 	private JButton button;
 
 	private JTextField textField;
+	Component c = null;
 	
 	private static final String HELP_MESSAGE = "<html><div align=\"center\">" +
 			"In der Übersicht sehen Sie primär alle Veranstaltungen, die Sie erzeugt haben.<br />" +
@@ -112,7 +114,7 @@ public class DeleteLecture_GUI extends JFrame {
 	/**
 	 * Create the dialog.
 	 */
-	public DeleteLecture_GUI() {
+	public DeleteLecture_GUI(Component formerGUI) {
 		addWindowListener(new WindowAdapter() {
 			@Override
 			public void windowClosing(WindowEvent arg0) {
@@ -195,7 +197,7 @@ public class DeleteLecture_GUI extends JFrame {
 		setTitle("bwLehrpool Suite - Veranstaltung löschen");
 		// Zentriert das Fenster in die Bildmitte
 		setBounds(0, 0, 842, 722);
-		GuiOrganizer.centerGUI(this);
+		setLocationRelativeTo(formerGUI);
 
 
 		getContentPane().setLayout(null);
@@ -277,7 +279,7 @@ public class DeleteLecture_GUI extends JFrame {
 				// oeffnet das Hauptmenue
 				
 				DeleteLecture_GUI.this.setVisible(false);
-				MainMenue_GUI main = new MainMenue_GUI();
+				MainMenue_GUI main = new MainMenue_GUI(c);
 				main.setVisible(true);
 			}
 		});
@@ -349,7 +351,7 @@ public class DeleteLecture_GUI extends JFrame {
 					public void actionPerformed(ActionEvent e) {
 						// oeffnet das Hauptmenue
 						
-						MainMenue_GUI main = new MainMenue_GUI();
+						MainMenue_GUI main = new MainMenue_GUI(c);
 						main.setVisible(true);
 						dispose();
 					}
@@ -474,7 +476,7 @@ public class DeleteLecture_GUI extends JFrame {
 						if (tablemyLectures.getSelectedRowCount() !=0){
 							//a row is selected
 							//ask for confirmation
-							eingabe = JOptionPane.showConfirmDialog(null,
+							eingabe = JOptionPane.showConfirmDialog(c,
 									"Wollen Sie diese Daten löschen?", "Löschen?",
 									JOptionPane.YES_NO_OPTION);
 							
@@ -487,7 +489,7 @@ public class DeleteLecture_GUI extends JFrame {
 										LOGGER.info("Löschen erfolgreich.");
 										//delete successful
 										
-										DeleteLecture_GUI dl = new DeleteLecture_GUI();
+										DeleteLecture_GUI dl = new DeleteLecture_GUI(c);
 										dl.setVisible(true);
 										dispose();
 									} else {
@@ -495,7 +497,7 @@ public class DeleteLecture_GUI extends JFrame {
 										LOGGER.error("Konnte Veranstaltung '" + lectureID + "' nicht aus der Datenbank löschen!");
 										JOptionPane
 										.showMessageDialog(
-												null,
+												c,
 												"Löschen der Veranstaltung aus der Datenbank fehlgeschlagen.",
 												"Fehler",
 												JOptionPane.INFORMATION_MESSAGE);
@@ -617,10 +619,12 @@ public class DeleteLecture_GUI extends JFrame {
 		mnNewMenu_Info.addMouseListener(new MouseAdapter() {
 			@Override
 			public void mouseClicked(MouseEvent arg0) {
-				JOptionPane.showMessageDialog(null, HELP_MESSAGE, "Hilfe zu dieser Oberfläche", JOptionPane.INFORMATION_MESSAGE);
+				JOptionPane.showMessageDialog(c, HELP_MESSAGE, "Hilfe zu dieser Oberfläche", JOptionPane.INFORMATION_MESSAGE);
 			}
 		});
 		menuBar.add(mnNewMenu_Info);
+		
+		c = this;
 
 	}
 
diff --git a/dozentenmodul/src/main/java/gui/lecture/EditLectureAllgemein_GUI.java b/dozentenmodul/src/main/java/gui/lecture/EditLectureAllgemein_GUI.java
index 4a3dc744..6ccd0831 100644
--- a/dozentenmodul/src/main/java/gui/lecture/EditLectureAllgemein_GUI.java
+++ b/dozentenmodul/src/main/java/gui/lecture/EditLectureAllgemein_GUI.java
@@ -4,6 +4,7 @@ import gui.intro.About_GUI;
 import gui.intro.MainMenue_GUI;
 
 import java.awt.Color;
+import java.awt.Component;
 import java.awt.FlowLayout;
 import java.awt.Font;
 import java.awt.ScrollPane;
@@ -42,7 +43,7 @@ import models.Image;
 import models.Lecture;
 import models.Links;
 import models.person;
-import util.GuiOrganizer;
+
 import util.OpenLinks;
 
 import com.toedter.calendar.JDateChooser;
@@ -66,6 +67,7 @@ public class EditLectureAllgemein_GUI extends JFrame {
 	JRadioButton radioButtonno;
 	Date startDate = new Date();
 	Date endDate;
+	Component c = null;
 	private final ButtonGroup buttonGroup = new ButtonGroup();
 	private boolean descriptionLengthOK = false; // description may not be
 													// longer than
@@ -86,7 +88,7 @@ public class EditLectureAllgemein_GUI extends JFrame {
 	/**
 	 * Create the dialog.
 	 */
-	public EditLectureAllgemein_GUI() {
+	public EditLectureAllgemein_GUI(Component formerGUI) {
 		addWindowListener(new WindowAdapter() {
 			@Override
 			public void windowClosing(WindowEvent arg0) {
@@ -105,7 +107,7 @@ public class EditLectureAllgemein_GUI extends JFrame {
 		setTitle("bwLehrpool Suite - Veranstaltung bearbeiten");
 		;
 		setBounds(0, 0, 603, 722);
-		GuiOrganizer.centerGUI(this);
+		setLocationRelativeTo(formerGUI);
 
 		getContentPane().setLayout(null);
 		{
@@ -212,7 +214,7 @@ public class EditLectureAllgemein_GUI extends JFrame {
 			public void mouseClicked(MouseEvent arg0) {
 
 				EditLectureAllgemein_GUI.this.setVisible(false);
-				MainMenue_GUI main = new MainMenue_GUI();
+				MainMenue_GUI main = new MainMenue_GUI(c);
 				main.setVisible(true);
 			}
 		});
@@ -388,7 +390,7 @@ public class EditLectureAllgemein_GUI extends JFrame {
 						Lecture.lecture.setStartdate(dateChooserstart.getDate());
 						Image.image.setImagename(textFieldLaborname.getText());
 
-						MainMenue_GUI sr = new MainMenue_GUI();
+						MainMenue_GUI sr = new MainMenue_GUI(c);
 						sr.setVisible(true);
 						dispose();
 					}
@@ -426,7 +428,7 @@ public class EditLectureAllgemein_GUI extends JFrame {
 							isDateOrderCorrect = false;
 							JOptionPane
 									.showMessageDialog(
-											null,
+											c,
 											"Das End-Datum liegt vor dem Start-Datum. Bitte ändern.",
 											"Datum fehlerhaft",
 											JOptionPane.INFORMATION_MESSAGE);
@@ -439,7 +441,7 @@ public class EditLectureAllgemein_GUI extends JFrame {
 						if (dateChooserend.getDate().after(endDate)) {
 							// Datum zu weit weg
 							isDateMaxLifeTimeCorrect = false;
-							JOptionPane.showMessageDialog(null,
+							JOptionPane.showMessageDialog(c,
 									"Das End-Datum liegt zu weit in der Zukunft. Erlaubt ist maximal:\n"
 											+ endDate, "Datum fehlerhaft",
 									JOptionPane.INFORMATION_MESSAGE);
@@ -457,7 +459,7 @@ public class EditLectureAllgemein_GUI extends JFrame {
 							isAllInformationReady = false;
 							JOptionPane
 									.showMessageDialog(
-											null,
+											c,
 											"Bitte geben Sie einen Veranstaltungsnamen und eine Beschreibung ein.",
 											"Datum fehlerhaft",
 											JOptionPane.INFORMATION_MESSAGE);
@@ -489,7 +491,7 @@ public class EditLectureAllgemein_GUI extends JFrame {
 							Image.image.setImagename(textFieldLaborname
 									.getText());
 
-							PermissionCreateLecture_GUI ev = new PermissionCreateLecture_GUI();
+							PermissionCreateLecture_GUI ev = new PermissionCreateLecture_GUI(c);
 							ev.setVisible(true);
 							dispose();
 						}
@@ -567,11 +569,13 @@ public class EditLectureAllgemein_GUI extends JFrame {
 		mnNewMenu_Info.addMouseListener(new MouseAdapter() {
 			@Override
 			public void mouseClicked(MouseEvent arg0) {
-				JOptionPane.showMessageDialog(null, HELP_MESSAGE, "Hilfe zu dieser Oberfläche", JOptionPane.INFORMATION_MESSAGE);
+				JOptionPane.showMessageDialog(c, HELP_MESSAGE, "Hilfe zu dieser Oberfläche", JOptionPane.INFORMATION_MESSAGE);
 			}
 		});
 		menuBar.add(mnNewMenu_Info);
 
+		c = this;
+		setLocationRelativeTo(formerGUI);
 	}
 
 	public Date addDays(Date date, int days) {
@@ -587,7 +591,7 @@ public class EditLectureAllgemein_GUI extends JFrame {
 		// max length is 254 chars
 		if (description.getText().length() >= MAX_DESCRIPTION_LENGTH) {
 			descriptionLengthOK = false;
-			JOptionPane.showMessageDialog(null,
+			JOptionPane.showMessageDialog(c,
 					"Die Beschreibung darf max 254 Zeichen enthalten. Aktuell enthält sie "
 							+ description.getText().length() + ".",
 					"Beschreibung zu umfangreich",
diff --git a/dozentenmodul/src/main/java/gui/lecture/EditLectureLink_GUI.java b/dozentenmodul/src/main/java/gui/lecture/EditLectureLink_GUI.java
index 63827070..dbacf997 100644
--- a/dozentenmodul/src/main/java/gui/lecture/EditLectureLink_GUI.java
+++ b/dozentenmodul/src/main/java/gui/lecture/EditLectureLink_GUI.java
@@ -4,6 +4,7 @@ import gui.intro.About_GUI;
 import gui.intro.MainMenue_GUI;
 
 import java.awt.Color;
+import java.awt.Component;
 import java.awt.FlowLayout;
 import java.awt.Font;
 import java.awt.SystemColor;
@@ -94,6 +95,7 @@ public class EditLectureLink_GUI extends JFrame {
 	private JTextField textFieldName;
 	JTabbedPane tabbedPane;
 	boolean activeSearch=false;
+	Component c = null;
 	String[] titles = { "Image-Name", "Lizenzpflichtig", "OS", "Veranstaltung",
 			"Verantwortlicher", "Letztes Update", "ID", "Version","Template" };
 	ThriftConnection con = new ThriftConnection();
@@ -129,7 +131,7 @@ public class EditLectureLink_GUI extends JFrame {
 	/**
 	 * Create the dialog.
 	 */
-	public EditLectureLink_GUI() {
+	public EditLectureLink_GUI(Component formerGUI) {
 		addWindowListener(new WindowAdapter() {
 			@Override
 			public void windowClosing(WindowEvent arg0) {
@@ -218,7 +220,7 @@ public class EditLectureLink_GUI extends JFrame {
 		setTitle("bwLehrpool Suite - Veranstaltung bearbeiten");
 		
 		setBounds(0, 0, 918, 722);
-		GuiOrganizer.centerGUI(this);
+		setLocationRelativeTo(formerGUI);
 
 		
 		final DefaultTableModel model = new DefaultTableModel(titles, 0);
@@ -345,7 +347,7 @@ public class EditLectureLink_GUI extends JFrame {
 			public void mouseClicked(MouseEvent arg0) {
 
 				EditLectureLink_GUI.this.setVisible(false);
-				MainMenue_GUI main = new MainMenue_GUI();
+				MainMenue_GUI main = new MainMenue_GUI(c);
 				main.setVisible(true);
 			}
 		});
@@ -517,7 +519,7 @@ public class EditLectureLink_GUI extends JFrame {
 				okButton.addActionListener(new ActionListener() {
 					public void actionPerformed(ActionEvent e) {
 
-						PermissionEditLecture_GUI el = new PermissionEditLecture_GUI();
+						PermissionEditLecture_GUI el = new PermissionEditLecture_GUI(c);
 						el.setVisible(true);
 						dispose();
 					}
@@ -576,23 +578,23 @@ public class EditLectureLink_GUI extends JFrame {
 										Lecture.lecture.getid());
 								JOptionPane
 										.showMessageDialog(
-												null,
+												c,
 												"Ihre Veranstaltung wurde erfolgreich geändert. Sie kehren nun zum Hauptmenü zurück.",
 												"Veranstaltung angelegt",
 												JOptionPane.INFORMATION_MESSAGE);
 								// zurueck zum Menue
-								MainMenue_GUI m = new MainMenue_GUI();
+								MainMenue_GUI m = new MainMenue_GUI(c);
 								m.setVisible(true);
 							} catch (TException e1) {
 								// TODO Auto-generated catch block
 								e1.printStackTrace();
 								JOptionPane
 										.showMessageDialog(
-												null,
+												c,
 												"Beim Anlegen Ihrer Veranstaltung ist ein Fehler aufgetreten.",
 												"Error",
 												JOptionPane.ERROR_MESSAGE);
-								JOptionPane.showMessageDialog(null,
+								JOptionPane.showMessageDialog(c,
 										e1.getCause()+"\n"+e1.getStackTrace(),
 										"Debug-Message", JOptionPane.ERROR_MESSAGE);
 							}
@@ -640,23 +642,23 @@ public class EditLectureLink_GUI extends JFrame {
 										Lecture.lecture.getid());
 								JOptionPane
 										.showMessageDialog(
-												null,
+												c,
 												"Ihre Veranstaltung wurde erfolgreich geändert. Sie kehren nun zum Hauptmenü zurück.",
 												"Veranstaltung angelegt",
 												JOptionPane.INFORMATION_MESSAGE);
 								// zurueck zum Menue
-								MainMenue_GUI m = new MainMenue_GUI();
+								MainMenue_GUI m = new MainMenue_GUI(c);
 								m.setVisible(true);
 							} catch (TException e1) {
 								// TODO Auto-generated catch block
 								e1.printStackTrace();
 								JOptionPane
 										.showMessageDialog(
-												null,
+												c,
 												"Beim Anlegen Ihrer Veranstaltung ist ein Fehler aufgetreten.",
 												"Error",
 												JOptionPane.ERROR_MESSAGE);
-								JOptionPane.showMessageDialog(null,
+								JOptionPane.showMessageDialog(c,
 										e1.getCause()+"\n"+e1.getStackTrace(),
 										"Debug-Message", JOptionPane.ERROR_MESSAGE);
 							}
@@ -706,19 +708,19 @@ public class EditLectureLink_GUI extends JFrame {
 										Lecture.lecture.getid());
 								JOptionPane
 										.showMessageDialog(
-												null,
+												c,
 												"Ihre Veranstaltung wurde erfolgreich geändert. Sie kehren nun zum Hauptmenü zurück.",
 												"Veranstaltung angelegt",
 												JOptionPane.INFORMATION_MESSAGE);
 								// zurueck zum Menue
-								MainMenue_GUI m = new MainMenue_GUI();
+								MainMenue_GUI m = new MainMenue_GUI(c);
 								m.setVisible(true);
 							} catch (TException e1) {
 								// TODO Auto-generated catch block
 								e1.printStackTrace();
 								JOptionPane
 										.showMessageDialog(
-												null,
+												c,
 												"Beim Anlegen Ihrer Veranstaltung ist ein Fehler aufgetreten.",
 												"Error",
 												JOptionPane.ERROR_MESSAGE);
@@ -732,7 +734,7 @@ public class EditLectureLink_GUI extends JFrame {
 						}   
 						else {
 							// nothing selected
-							JOptionPane.showMessageDialog(null,
+							JOptionPane.showMessageDialog(c,
 									"Bitte wählen Sie ein Image aus.",
 									"Image Auswahl",
 									JOptionPane.INFORMATION_MESSAGE);
@@ -938,11 +940,13 @@ public class EditLectureLink_GUI extends JFrame {
 		mnNewMenu_Info.addMouseListener(new MouseAdapter() {
 			@Override
 			public void mouseClicked(MouseEvent arg0) {
-				JOptionPane.showMessageDialog(null, HELP_MESSAGE, "Hilfe zu dieser Oberfläche", JOptionPane.INFORMATION_MESSAGE);
+				JOptionPane.showMessageDialog(c, HELP_MESSAGE, "Hilfe zu dieser Oberfläche", JOptionPane.INFORMATION_MESSAGE);
 			}
 		});
 		menuBar.add(mnNewMenu_Info);
 		
+		c = this;
+		
 	}
 
 	// Initiale Beffuelung eines Table models
diff --git a/dozentenmodul/src/main/java/gui/lecture/EditLectureSearch_GUI.java b/dozentenmodul/src/main/java/gui/lecture/EditLectureSearch_GUI.java
index 2ef05d15..c88f3f9b 100644
--- a/dozentenmodul/src/main/java/gui/lecture/EditLectureSearch_GUI.java
+++ b/dozentenmodul/src/main/java/gui/lecture/EditLectureSearch_GUI.java
@@ -4,6 +4,7 @@ import gui.intro.About_GUI;
 import gui.intro.MainMenue_GUI;
 
 import java.awt.Color;
+import java.awt.Component;
 import java.awt.FlowLayout;
 import java.awt.Font;
 import java.awt.SystemColor;
@@ -35,19 +36,15 @@ import javax.swing.JPanel;
 import javax.swing.JRadioButton;
 import javax.swing.JScrollPane;
 import javax.swing.JSeparator;
-import javax.swing.JTabbedPane;
 import javax.swing.JTable;
 import javax.swing.JTextArea;
 import javax.swing.JTextField;
 import javax.swing.JTextPane;
 import javax.swing.RowFilter;
-import javax.swing.ScrollPaneConstants;
 import javax.swing.UIManager;
 import javax.swing.UnsupportedLookAndFeelException;
 import javax.swing.border.EmptyBorder;
 import javax.swing.border.TitledBorder;
-import javax.swing.event.ChangeEvent;
-import javax.swing.event.ChangeListener;
 import javax.swing.event.ListSelectionEvent;
 import javax.swing.event.ListSelectionListener;
 import javax.swing.table.DefaultTableModel;
@@ -83,6 +80,7 @@ public class EditLectureSearch_GUI extends JFrame {
 	JTable tablemyLectures;
 	private JTextField textFieldName;
 	boolean activeSearch = false;
+	Component c = null;
 	String[] titles = { "Veranstaltungsname", "Beschreibung",
 			"Gültigkeitsdatum", "Aktiv", "Letzte Benutzung",
 			"Verantwortlicher", "Image", "Schlagwort", "ID" };
@@ -112,7 +110,7 @@ public class EditLectureSearch_GUI extends JFrame {
 	/**
 	 * Create the dialog.
 	 */
-	public EditLectureSearch_GUI() {
+	public EditLectureSearch_GUI(Component formerGUI) {
 		addWindowListener(new WindowAdapter() {
 			@Override
 			public void windowClosing(WindowEvent arg0) {
@@ -196,7 +194,7 @@ public class EditLectureSearch_GUI extends JFrame {
 		setTitle("bwLehrpool Suite - Veranstaltung bearbeiten");
 		// Zentriert das Fenster in die Bildmitte
 		setBounds(0, 0, 842, 722);
-		GuiOrganizer.centerGUI(this);
+		setLocationRelativeTo(formerGUI);
 
 		getContentPane().setLayout(null);
 		{
@@ -285,7 +283,7 @@ public class EditLectureSearch_GUI extends JFrame {
 				// oeffnet das Hauptmenue
 
 				EditLectureSearch_GUI.this.setVisible(false);
-				MainMenue_GUI main = new MainMenue_GUI();
+				MainMenue_GUI main = new MainMenue_GUI(c);
 				main.setVisible(true);
 			}
 		});
@@ -356,7 +354,7 @@ public class EditLectureSearch_GUI extends JFrame {
 					public void actionPerformed(ActionEvent e) {
 						// oeffnet das Hauptmenue
 
-						MainMenue_GUI main = new MainMenue_GUI();
+						MainMenue_GUI main = new MainMenue_GUI(c);
 						main.setVisible(true);
 						dispose();
 					}
@@ -451,7 +449,7 @@ public class EditLectureSearch_GUI extends JFrame {
 
 							// EditImageAllgemein_GUI ea=new
 							// EditImageAllgemein_GUI();
-							EditLectureAllgemein_GUI el = new EditLectureAllgemein_GUI();
+							EditLectureAllgemein_GUI el = new EditLectureAllgemein_GUI(c);
 							el.setVisible(true);
 							dispose();
 						}
@@ -718,11 +716,13 @@ public class EditLectureSearch_GUI extends JFrame {
 		mnNewMenu_Info.addMouseListener(new MouseAdapter() {
 			@Override
 			public void mouseClicked(MouseEvent arg0) {
-				JOptionPane.showMessageDialog(null, HELP_MESSAGE, "Hilfe zu dieser Oberfläche", JOptionPane.INFORMATION_MESSAGE);
+				JOptionPane.showMessageDialog(c, HELP_MESSAGE, "Hilfe zu dieser Oberfläche", JOptionPane.INFORMATION_MESSAGE);
 			}
 		});
 		menuBar.add(mnNewMenu_Info);
 		
+		c = this;
+		
 	}
 
 	// Initiale Beffuelung eines Table models
diff --git a/dozentenmodul/src/main/java/gui/lecture/PermissionCreateLecture_GUI.java b/dozentenmodul/src/main/java/gui/lecture/PermissionCreateLecture_GUI.java
index d63a220a..74df74ff 100644
--- a/dozentenmodul/src/main/java/gui/lecture/PermissionCreateLecture_GUI.java
+++ b/dozentenmodul/src/main/java/gui/lecture/PermissionCreateLecture_GUI.java
@@ -4,7 +4,6 @@ package gui.lecture;
 import gui.intro.About_GUI;
 import gui.intro.MainMenue_GUI;
 
-import java.awt.Checkbox;
 import java.awt.Color;
 import java.awt.Component;
 import java.awt.FlowLayout;
@@ -19,14 +18,12 @@ import java.awt.event.MouseEvent;
 import java.awt.event.MouseListener;
 import java.awt.event.WindowAdapter;
 import java.awt.event.WindowEvent;
-import java.io.IOException;
 import java.net.URI;
 import java.net.URISyntaxException;
 
 import javax.swing.AbstractButton;
 import javax.swing.ButtonGroup;
 import javax.swing.DefaultComboBoxModel;
-import javax.swing.Icon;
 import javax.swing.JButton;
 import javax.swing.JCheckBox;
 import javax.swing.JComboBox;
@@ -37,33 +34,25 @@ import javax.swing.JMenuBar;
 import javax.swing.JMenuItem;
 import javax.swing.JOptionPane;
 import javax.swing.JPanel;
+import javax.swing.JRadioButton;
+import javax.swing.JScrollPane;
 import javax.swing.JSeparator;
+import javax.swing.JTable;
+import javax.swing.JTextField;
 import javax.swing.JTextPane;
+import javax.swing.ScrollPaneConstants;
 import javax.swing.UIManager;
 import javax.swing.UnsupportedLookAndFeelException;
 import javax.swing.border.EmptyBorder;
 import javax.swing.border.TitledBorder;
-import javax.swing.table.DefaultTableCellRenderer;
 import javax.swing.table.DefaultTableModel;
 import javax.swing.table.JTableHeader;
-import javax.swing.table.TableCellEditor;
 import javax.swing.table.TableCellRenderer;
 import javax.swing.table.TableColumn;
 import javax.swing.table.TableColumnModel;
 
-import models.Image;
 import models.Links;
-import util.GuiOrganizer;
 import util.OpenLinks;
-import javax.swing.JTable;
-import javax.swing.JScrollPane;
-import javax.swing.ScrollPaneConstants;
-import javax.swing.JTextField;
-
-import org.eclipse.jface.viewers.CheckboxCellEditor;
-
-import java.awt.Choice;
-import javax.swing.JRadioButton;
 
 @SuppressWarnings("serial")
 public class PermissionCreateLecture_GUI extends JFrame {
@@ -73,6 +62,7 @@ public class PermissionCreateLecture_GUI extends JFrame {
 	private JTable table;
 	private Class[] classes;
 	Object[] titles = { "Name","Read", "Write","Admin"};
+	Component c = null;
 	private static final String HELP_MESSAGE = "<html><div align=\"center\">" +
 			"Hier können Sie die Berechtigungen für Ihre Veranstaltung ändern.<br />" +
 			"Es wird unterschieden, ob innerhalb der Suite (dieses Programm) Änderungen vorgenommen werden dürfen, <br />" +
@@ -105,7 +95,7 @@ public class PermissionCreateLecture_GUI extends JFrame {
 	private JTable table_1;
 	private final ButtonGroup buttonGroup = new ButtonGroup();
 
-	public PermissionCreateLecture_GUI() {
+	public PermissionCreateLecture_GUI(Component formerGUI) {
 		addWindowListener(new WindowAdapter() {
 			@Override
 			public void windowClosing(WindowEvent arg0) {
@@ -124,7 +114,7 @@ public class PermissionCreateLecture_GUI extends JFrame {
 		setTitle("bwLehrpool Suite - Berechtigungen");
 
 		setBounds(0, 0, 603, 722);
-		GuiOrganizer.centerGUI(this);
+		setLocationRelativeTo(formerGUI);
 
 		getContentPane().setLayout(null);
 		{
@@ -212,7 +202,7 @@ public class PermissionCreateLecture_GUI extends JFrame {
 			public void mouseClicked(MouseEvent arg0) {
 				
 				PermissionCreateLecture_GUI.this.setVisible(false);
-				MainMenue_GUI main=new MainMenue_GUI();
+				MainMenue_GUI main=new MainMenue_GUI(c);
 				main.setVisible(true);
 			}
 		});
@@ -334,7 +324,7 @@ public class PermissionCreateLecture_GUI extends JFrame {
 					public void actionPerformed(ActionEvent e) {
 						
 						
-						CreateLectureAllgemein_GUI sr=new CreateLectureAllgemein_GUI();
+						CreateLectureAllgemein_GUI sr=new CreateLectureAllgemein_GUI(c);
 						sr.setVisible(true);
 						dispose();
 					}
@@ -348,7 +338,7 @@ public class PermissionCreateLecture_GUI extends JFrame {
 				continueButton.addActionListener(new ActionListener() {
 					public void actionPerformed(ActionEvent e) {
 						
-						CreateLectureLink_GUI ea=new CreateLectureLink_GUI();
+						CreateLectureLink_GUI ea=new CreateLectureLink_GUI(c);
 						ea.setVisible(true);
 						dispose();
 						
@@ -448,12 +438,12 @@ public class PermissionCreateLecture_GUI extends JFrame {
 		mnNewMenu_Info.addMouseListener(new MouseAdapter() {
 			@Override
 			public void mouseClicked(MouseEvent arg0) {
-				JOptionPane.showMessageDialog(null, HELP_MESSAGE, "Hilfe zu dieser Oberfläche", JOptionPane.INFORMATION_MESSAGE);
+				JOptionPane.showMessageDialog(c, HELP_MESSAGE, "Hilfe zu dieser Oberfläche", JOptionPane.INFORMATION_MESSAGE);
 			}
 		});
 		menuBar.add(mnNewMenu_Info);
 		
-	
+		c = this;
 		
 	}
 	  class MyItemListener1 implements ItemListener  
diff --git a/dozentenmodul/src/main/java/gui/lecture/PermissionEditLecture_GUI.java b/dozentenmodul/src/main/java/gui/lecture/PermissionEditLecture_GUI.java
index 0f06ec9d..c146d42b 100644
--- a/dozentenmodul/src/main/java/gui/lecture/PermissionEditLecture_GUI.java
+++ b/dozentenmodul/src/main/java/gui/lecture/PermissionEditLecture_GUI.java
@@ -4,7 +4,6 @@ package gui.lecture;
 import gui.intro.About_GUI;
 import gui.intro.MainMenue_GUI;
 
-import java.awt.Checkbox;
 import java.awt.Color;
 import java.awt.Component;
 import java.awt.FlowLayout;
@@ -16,19 +15,14 @@ import java.awt.event.ItemEvent;
 import java.awt.event.ItemListener;
 import java.awt.event.MouseAdapter;
 import java.awt.event.MouseEvent;
-import java.awt.event.MouseListener;
 import java.awt.event.WindowAdapter;
 import java.awt.event.WindowEvent;
-import java.io.IOException;
 import java.net.URI;
 import java.net.URISyntaxException;
 
 import javax.swing.AbstractButton;
-import javax.swing.ButtonGroup;
 import javax.swing.DefaultComboBoxModel;
-import javax.swing.Icon;
 import javax.swing.JButton;
-import javax.swing.JCheckBox;
 import javax.swing.JComboBox;
 import javax.swing.JFrame;
 import javax.swing.JLabel;
@@ -37,33 +31,23 @@ import javax.swing.JMenuBar;
 import javax.swing.JMenuItem;
 import javax.swing.JOptionPane;
 import javax.swing.JPanel;
+import javax.swing.JRadioButton;
+import javax.swing.JScrollPane;
 import javax.swing.JSeparator;
+import javax.swing.JTable;
+import javax.swing.JTextField;
 import javax.swing.JTextPane;
+import javax.swing.ScrollPaneConstants;
 import javax.swing.UIManager;
 import javax.swing.UnsupportedLookAndFeelException;
 import javax.swing.border.EmptyBorder;
 import javax.swing.border.TitledBorder;
-import javax.swing.table.DefaultTableCellRenderer;
 import javax.swing.table.DefaultTableModel;
-import javax.swing.table.JTableHeader;
-import javax.swing.table.TableCellEditor;
 import javax.swing.table.TableCellRenderer;
 import javax.swing.table.TableColumn;
-import javax.swing.table.TableColumnModel;
 
-import models.Image;
 import models.Links;
-import util.GuiOrganizer;
 import util.OpenLinks;
-import javax.swing.JTable;
-import javax.swing.JScrollPane;
-import javax.swing.ScrollPaneConstants;
-import javax.swing.JTextField;
-
-import org.eclipse.jface.viewers.CheckboxCellEditor;
-
-import java.awt.Choice;
-import javax.swing.JRadioButton;
 
 @SuppressWarnings("serial")
 public class PermissionEditLecture_GUI extends JFrame {
@@ -73,6 +57,7 @@ public class PermissionEditLecture_GUI extends JFrame {
 	private JTable table;
 	private Class[] classes;
 	Object[] titles = { "Name","Read", "Write","Admin"};
+	Component c = null;
 	private static final String HELP_MESSAGE = "<html><div align=\"center\">" +
 			"Hier können Sie die Berechtigungen für Ihre Veranstaltung festlegen.<br />" +
 			"Es wird unterschieden, ob innerhalb der Suite (dieses Programm) Änderungen vorgenommen werden dürfen, <br />" +
@@ -103,7 +88,7 @@ public class PermissionEditLecture_GUI extends JFrame {
 	};
 	private JTextField textField;
 
-	public PermissionEditLecture_GUI() {
+	public PermissionEditLecture_GUI(Component formerGUI) {
 		addWindowListener(new WindowAdapter() {
 			@Override
 			public void windowClosing(WindowEvent arg0) {
@@ -122,7 +107,7 @@ public class PermissionEditLecture_GUI extends JFrame {
 		setTitle("bwLehrpool Suite - Berechtigungen");
 
 		setBounds(0, 0, 603, 722);
-		GuiOrganizer.centerGUI(this);
+		setLocationRelativeTo(formerGUI);
 
 		getContentPane().setLayout(null);
 		{
@@ -241,7 +226,7 @@ public class PermissionEditLecture_GUI extends JFrame {
 			public void mouseClicked(MouseEvent arg0) {
 				
 				PermissionEditLecture_GUI.this.setVisible(false);
-				MainMenue_GUI main=new MainMenue_GUI();
+				MainMenue_GUI main=new MainMenue_GUI(c);
 				main.setVisible(true);
 			}
 		});
@@ -329,7 +314,7 @@ public class PermissionEditLecture_GUI extends JFrame {
 					public void actionPerformed(ActionEvent e) {
 						
 						
-						EditLectureAllgemein_GUI sr=new EditLectureAllgemein_GUI();
+						EditLectureAllgemein_GUI sr=new EditLectureAllgemein_GUI(c);
 						sr.setVisible(true);
 						dispose();
 					}
@@ -343,7 +328,7 @@ public class PermissionEditLecture_GUI extends JFrame {
 				continueButton.addActionListener(new ActionListener() {
 					public void actionPerformed(ActionEvent e) {
 						
-						EditLectureLink_GUI ea=new EditLectureLink_GUI();
+						EditLectureLink_GUI ea=new EditLectureLink_GUI(c);
 						ea.setVisible(true);
 						dispose();
 						
@@ -443,11 +428,13 @@ public class PermissionEditLecture_GUI extends JFrame {
 		mnNewMenu_Info.addMouseListener(new MouseAdapter() {
 			@Override
 			public void mouseClicked(MouseEvent arg0) {
-				JOptionPane.showMessageDialog(null, HELP_MESSAGE, "Hilfe zu dieser Oberfläche", JOptionPane.INFORMATION_MESSAGE);
+				JOptionPane.showMessageDialog(c, HELP_MESSAGE, "Hilfe zu dieser Oberfläche", JOptionPane.INFORMATION_MESSAGE);
 			}
 		});
 		menuBar.add(mnNewMenu_Info);
 		
+		c = this;
+		
 	}
 	  class MyItemListener1 implements ItemListener  
 	  {  
diff --git a/dozentenmodul/src/main/java/gui/lecture/SearchLecture_GUI.java b/dozentenmodul/src/main/java/gui/lecture/SearchLecture_GUI.java
index 4a8b9fd9..1f597cb3 100644
--- a/dozentenmodul/src/main/java/gui/lecture/SearchLecture_GUI.java
+++ b/dozentenmodul/src/main/java/gui/lecture/SearchLecture_GUI.java
@@ -4,6 +4,7 @@ import gui.intro.About_GUI;
 import gui.intro.MainMenue_GUI;
 
 import java.awt.Color;
+import java.awt.Component;
 import java.awt.FlowLayout;
 import java.awt.Font;
 import java.awt.Point;
@@ -83,6 +84,7 @@ public class SearchLecture_GUI extends JFrame {
 	private JTextField textFieldName;
 	JTabbedPane tabbedPane;
 	boolean activeSearch=false;
+	Component c = null;
 	String[] titles = { "Veranstaltungsname", "Beschreibung",
 			"Gültigkeitsdatum", "Aktiv", "Letzte Benutzung",
 			"Verantwortlicher", "Image", "Schlagwort", "ID" };
@@ -107,7 +109,7 @@ public class SearchLecture_GUI extends JFrame {
 	/**
 	 * Create the dialog.
 	 */
-	public SearchLecture_GUI() {
+	public SearchLecture_GUI(Component formerGUI) {
 		addWindowListener(new WindowAdapter() {
 			@Override
 			public void windowClosing(WindowEvent arg0) {
@@ -178,7 +180,7 @@ public class SearchLecture_GUI extends JFrame {
 		setTitle("bwLehrpool Suite - Veranstaltung suchen");
 		// Zentriert das Fenster in die Bildmitte 2;
 		setBounds(0, 0, 842, 722);
-		GuiOrganizer.centerGUI(this);
+		setLocationRelativeTo(formerGUI);
 
 		getContentPane().setLayout(null);
 		{
@@ -258,7 +260,7 @@ public class SearchLecture_GUI extends JFrame {
 				// oeffnet das Hauptmenue
 				
 				SearchLecture_GUI.this.setVisible(false);
-				MainMenue_GUI main = new MainMenue_GUI();
+				MainMenue_GUI main = new MainMenue_GUI(c);
 				main.setVisible(true);
 			}
 		});
@@ -386,7 +388,7 @@ public class SearchLecture_GUI extends JFrame {
 					public void actionPerformed(ActionEvent e) {
 						// oeffnet das Hauptmenue
 						
-						MainMenue_GUI main = new MainMenue_GUI();
+						MainMenue_GUI main = new MainMenue_GUI(c);
 						main.setVisible(true);
 						dispose();
 					}
@@ -558,6 +560,8 @@ public class SearchLecture_GUI extends JFrame {
 			}
 		});
 		mnNewMenu_1.add(mntmAbout);
+		
+		c = this;
 
 	}
author	Nino Breuer	2014-10-09 14:52:01 +0200
committer	Nino Breuer	2014-10-09 14:52:01 +0200
commit	39833fd5db8f92dcc4a34a623b6e4f59cde2e74f (patch)
tree	e4db6866847c11ac27a339a58f2f220bf836490c /dozentenmodul/src/main/java
parent	Merge branch 'master' of ssh://git.openslx.org/openslx-ng/tutor-module (diff)
download	tutor-module-39833fd5db8f92dcc4a34a623b6e4f59cde2e74f.tar.gz tutor-module-39833fd5db8f92dcc4a34a623b6e4f59cde2e74f.tar.xz tutor-module-39833fd5db8f92dcc4a34a623b6e4f59cde2e74f.zip