[client] enable save button when changing linked VM of a lecture

Closes #3422

2 files changed, 38 insertions, 12 deletions

diff --git a/dozentenmodul/src/main/java/org/openslx/dozmod/gui/window/LectureChangeImage.java b/dozentenmodul/src/main/java/org/openslx/dozmod/gui/window/LectureChangeImage.java
index 6fbaac77..a2654896 100644
--- a/dozentenmodul/src/main/java/org/openslx/dozmod/gui/window/LectureChangeImage.java
+++ b/dozentenmodul/src/main/java/org/openslx/dozmod/gui/window/LectureChangeImage.java
@@ -5,14 +5,19 @@ import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
 import java.awt.event.MouseAdapter;
 import java.awt.event.MouseEvent;
+import java.util.ArrayList;
+import java.util.List;
 
 import javax.swing.SwingUtilities;
+import javax.swing.event.ChangeListener;
 import javax.swing.event.ListSelectionEvent;
 import javax.swing.event.ListSelectionListener;
 
 import org.apache.log4j.Logger;
 import org.openslx.bwlp.thrift.iface.ImageSummaryRead;
 import org.openslx.dozmod.gui.Gui;
+import org.openslx.dozmod.gui.changemonitor.DialogChangeMonitor;
+import org.openslx.dozmod.gui.changemonitor.GenericControlWindow;
 import org.openslx.dozmod.gui.control.table.ImageTable;
 import org.openslx.dozmod.gui.helper.MessageType;
 import org.openslx.dozmod.gui.helper.UiFeedback;
@@ -23,21 +28,18 @@ import org.openslx.dozmod.permissions.ImagePerms;
  * Window for changing the linked image of a lecture
  */
 @SuppressWarnings("serial")
-public class LectureChangeImage extends LectureChangeImageLayout implements UiFeedback {
+public class LectureChangeImage extends LectureChangeImageLayout implements UiFeedback, GenericControlWindow<ImageSummaryRead> {
 
 	private static final Logger LOGGER = Logger.getLogger(LectureChangeImage.class);
 
 	private boolean okUsed = false;
 	private ImageTable imageTable;
-
-	private LectureChangeImage me;
-
+	private List<ChangeListener> listeners;
 	/**
 	 * Don't use this constructor, use static function open instead.
 	 */
 	protected LectureChangeImage(final Window modalParent) {
 		super(modalParent);
-		me = this;
 
 		/**
 		 * initialise the ImageListViewer
@@ -76,10 +78,10 @@ public class LectureChangeImage extends LectureChangeImageLayout implements UiFe
 						dispose();
 					} else {
 						if (!image.isValid) {
-							Gui.showMessageBox(me, "Ausgewählte VM ist ungültig!", MessageType.ERROR,
+							Gui.showMessageBox(LectureChangeImage.this, "Ausgewählte VM ist ungültig!", MessageType.ERROR,
 									LOGGER, null);
 						} else {
-							Gui.showMessageBox(me, "Keine Rechte zum Verlinken auf die ausgewählte VM.",
+							Gui.showMessageBox(LectureChangeImage.this, "Keine Rechte zum Verlinken auf die ausgewählte VM.",
 									MessageType.ERROR, LOGGER, null);
 						}
 					}
@@ -121,10 +123,32 @@ public class LectureChangeImage extends LectureChangeImageLayout implements UiFe
 	 */
 	private ImageSummaryRead runAndReturn() {
 		setVisible(true);
+		if (okUsed)
+			fireChangeEvent();
+		return getState();
+	}
+
+	@Override
+	public ImageSummaryRead getState() {
 		if (okUsed) {
 			return imageTable.getSelectedItem();
-		} else {
-			return null;
+		}
+		return null;
+	}
+
+	@Override
+	public void addChangeListener(ChangeListener l) {
+		if (listeners == null) {
+			listeners = new ArrayList<>();
+		}
+		listeners.add(l);
+	}
+
+	private void fireChangeEvent() {
+		if (listeners == null)
+			return;
+		for (ChangeListener cl : listeners) {
+			cl.stateChanged(null);
 		}
 	}
 
@@ -135,8 +159,10 @@ public class LectureChangeImage extends LectureChangeImageLayout implements UiFe
 	 * @return ImageSummaryRead of selected image or null, if abort has been
 	 *         used
 	 */
-	public static ImageSummaryRead open(Window modalParent) {
-		return new LectureChangeImage(modalParent).runAndReturn();
+	public static ImageSummaryRead open(Window modalParent, DialogChangeMonitor monitor) {
+		LectureChangeImage lci = new LectureChangeImage(modalParent);
+		monitor.add(lci);
+		return lci.runAndReturn();
 	}
 
 	@Override
diff --git a/dozentenmodul/src/main/java/org/openslx/dozmod/gui/window/LectureDetailsWindow.java b/dozentenmodul/src/main/java/org/openslx/dozmod/gui/window/LectureDetailsWindow.java
index 74119cd2..ac94333b 100644
--- a/dozentenmodul/src/main/java/org/openslx/dozmod/gui/window/LectureDetailsWindow.java
+++ b/dozentenmodul/src/main/java/org/openslx/dozmod/gui/window/LectureDetailsWindow.java
@@ -200,7 +200,7 @@ public class LectureDetailsWindow extends LectureDetailsWindowLayout implements
 		btnLinkImage.addActionListener(new ActionListener() {
 			@Override
 			public void actionPerformed(ActionEvent e) {
-				final ImageSummaryRead newImage = LectureChangeImage.open(me);
+				final ImageSummaryRead newImage = LectureChangeImage.open(LectureDetailsWindow.this, changeMonitor);
 				if (newImage == null)
 					return;
 				final ImageMetaCallback callback = new ImageMetaCallback() {