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package util;
import java.awt.GraphicsConfiguration;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import java.awt.HeadlessException;
import java.awt.Rectangle;
import java.awt.Window;
import javax.swing.JOptionPane;
/**
* An abstract class to organize the GUI.
* Currently only provide a method for centering Window-objects.
*/
public abstract class GuiOrganizer {
/**
* The rectangle representing the bounds of the primary display
*/
private static Rectangle rect = null;
/**
* Gets the bounds of the primary display using
* AWT's GraphicsEnvironment class.
*/
private static boolean getDisplayBounds() {
GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
GraphicsDevice gd = null;
try {
gd = ge.getDefaultScreenDevice();
} catch (HeadlessException he) {
he.printStackTrace();
JOptionPane.showMessageDialog(null, "Konnte kein Display ermittelt werden.",
"Fehler", JOptionPane.ERROR_MESSAGE);
return false;
}
GraphicsConfiguration gc = gd.getDefaultConfiguration();
rect = gc.getBounds();
if (rect == null) {
JOptionPane.showMessageDialog(null, "Konnte die Resolution des Bildschirms nicht ermitteln!",
"Fehler", JOptionPane.ERROR_MESSAGE);
return false;
} else {
return true;
}
}
/**
* Centers the given Window within the bounds of the display
* @param gui The Window object to be centered.
*/
public static void centerGUI(Window gui) {
if (rect == null) getDisplayBounds();
double width = rect.getWidth();
double height = rect.getHeight();
double xPosition = (width / 2 - gui.getWidth() / 2);
double yPosition = (height / 2 - gui.getHeight() / 2);
gui.setLocation((int) xPosition, (int) yPosition);
}
}
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