Managing the shape of a window - Java Swing

Java examples for Swing:JFrame

  1. HOME
  2. Java
  3. Swing
  4. JFrame

Description

Managing the shape of a window

Demo Code

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GraphicsDevice;
import java.awt.GraphicsDevice.WindowTranslucency;
import java.awt.GraphicsEnvironment;
import java.awt.Polygon;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ComponentAdapter;
import java.awt.event.ComponentEvent;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;

class StopPanel extends JPanel {

  public StopPanel() {
    this.setBackground(Color.red);
    this.setForeground(Color.red);
    this.setLayout(null);

    JButton okButton = new JButton("YES");
    JButton cancelButton = new JButton("NO");
    okButton.setBounds(90, 225, 65, 50);
    cancelButton.setBounds(150, 225, 65, 50);

    okButton.addActionListener(event->System.exit(0));
    cancelButton.addActionListener(event->System.exit(0));

    this.add(okButton);
    this.add(cancelButton);

  }/* w  w w  . j  a v  a 2  s .  c  o m*/

  @Override
  public void paintComponent(Graphics g) {
    super.paintComponent(g);
    Graphics2D g2d = (Graphics2D) g;
    int pageHeight = this.getHeight();
    int pageWidth = this.getWidth();
    int bigHeight = (pageHeight + 80) / 2;
    int bigWidth = (pageWidth - 305) / 2;
    int smallHeight = (pageHeight + 125) / 2;
    int smallWidth = (pageWidth - 225) / 2;


    g2d.setColor(Color.white);
    g2d.drawString("STOP", bigWidth, bigHeight);
    g2d.drawString("Are you sure you want to continue?", smallWidth, smallHeight);
  }
}

public class Main extends JFrame {

  public Main() {
    this.setTitle("Example");
    this.setSize(300, 300);
    this.setLocationRelativeTo(null);
    this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    this.add(new StopPanel());
    final Polygon myShape = getPolygon();

    this.addComponentListener(new ComponentAdapter() {

      @Override
      public void componentResized(ComponentEvent e) {
        setShape(myShape);
        ((JFrame) e.getSource()).setForeground(Color.red);
        ((JFrame) e.getSource()).setBackground(Color.red);
      }
    });

    this.setUndecorated(true);
  }

  private Polygon getPolygon() {
    int x1Points[] = { 0, 0, 100, 200, 300, 300, 200, 100 };
    int y1Points[] = { 100, 200, 300, 300, 200, 100, 0, 0 };
    Polygon polygon = new Polygon();
    for (int i = 0; i < y1Points.length; i++) {
      polygon.addPoint(x1Points[i], y1Points[i]);
    }
    return polygon;
  }

  public static void main(String[] args) {
    GraphicsEnvironment envmt = GraphicsEnvironment.getLocalGraphicsEnvironment();
    GraphicsDevice device = envmt.getDefaultScreenDevice();

    if (!device.isWindowTranslucencySupported(WindowTranslucency.PERPIXEL_TRANSLUCENT)) {
      System.out.println("Shaped windows are not supported on" + "your system.");
      System.exit(0);
    }

    SwingUtilities.invokeLater(()->{
        Main window = new Main();
        window.setVisible(true);
    });

  }
}

Related Tutorials