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@0xLeon
Last active December 10, 2015 19:08
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Swing exercise which creats an application with a window, a label and three buttons which align the window on the screen's center, open an new window and close the window.
package com.leon.uni;
import java.awt.Component;
import java.awt.EventQueue;
import java.awt.GraphicsEnvironment;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.Toolkit;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.WindowEvent;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
import javax.swing.border.EmptyBorder;
/**
* Implementation of javax.swing.JFrame which creates
* the example GUI program.
*
* @author Stefan Hahn (2837462)
*/
public class GUIExercise extends JFrame {
private JPanel contentPane;
/**
* Creates a frame.
*
* @param screenOffset Point indicating where to place the window
*/
public GUIExercise(Point screenOffset) {
setResizable(false);
setTitle("GUI Aufgabe");
this.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
this.setBounds((int) screenOffset.getX(), (int) screenOffset.getY(), 300, 100);
this.contentPane = new JPanel();
this.contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
this.setContentPane(contentPane);
contentPane.setLayout(null);
JLabel lblText = new JLabel("GUI Aufgabe");
lblText.setBounds(115, 10, 70, 14);
contentPane.add(lblText);
JPanel panel = new JPanel();
panel.setBounds(10, 32, 274, 33);
contentPane.add(panel);
JButton btnMove = new JButton("Move");
btnMove.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(final MouseEvent event) {
if (event.getButton() == MouseEvent.BUTTON1) {
Rectangle screenBounds = GraphicsEnvironment.getLocalGraphicsEnvironment().getMaximumWindowBounds();
Component frame = SwingUtilities.getRoot(event.getComponent());
int x = (int) Math.floor((screenBounds.width - frame.getWidth()) / 2);
int y = (int) Math.floor((screenBounds.height - frame.getHeight()) / 2);
frame.setLocation(x, y);
}
}
});
panel.add(btnMove);
JButton btnOpen = new JButton("Open");
btnOpen.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(final MouseEvent event) {
if (event.getButton() == MouseEvent.BUTTON1) {
EventQueue.invokeLater(new Runnable() {
public void run() {
Component frame = SwingUtilities.getRoot(event.getComponent());
try {
GUIExercise childFrame = new GUIExercise(new Point(frame.getX() + 20, frame.getY() + 20));
childFrame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
}
});
panel.add(btnOpen);
JButton btnClose = new JButton("Close");
btnClose.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(final MouseEvent event) {
if (event.getButton() == MouseEvent.BUTTON1) {
JFrame frame = (JFrame) SwingUtilities.getRoot(event.getComponent());
WindowEvent wev = new WindowEvent(frame, WindowEvent.WINDOW_CLOSING);
Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(wev);
}
}
});
panel.add(btnClose);
}
}
package com.leon.uni;
import java.awt.EventQueue;
import java.awt.Point;
/**
* Util class containing main method.
*
* @author Stefan Hahn (2837462)
*/
public final class Main {
/**
* Private constructor prevents instantiation.
*/
private Main() { }
/**
* Launch the application.
*
* @param args Console parameters
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
GUIExercise frame = new GUIExercise(new Point(100, 100));
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
}
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