Question

java中窗体的标题栏如何设为透明

使用Java设计出的窗体怎样将窗体的标题栏设为透明

Answer 1

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.Toolkit;
import java.awt.event.ComponentEvent;
import java.awt.event.ComponentListener;
import java.awt.event.WindowEvent;
import java.awt.event.WindowFocusListener;

import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.UIManager;

import com.birosoft.liquid.LiquidLookAndFeel;

public class TestEvent extends JComponent
implements ComponentListener,WindowFocusListener {

private JFrame frame;

private boolean start = false;

private Image background;

private Point p;

// 获得当前屏幕快照
public void updateBackground() {
try {
Robot rbt = new Robot();
Toolkit tk = Toolkit.getDefaultToolkit();
Dimension dim = tk.getScreenSize();
background = rbt.createScreenCapture(new Rectangle(0, 0, (int) dim
.getWidth(), (int) dim.getHeight()));
} catch (Exception ex) {
// p(ex.toString());
// 此方法没有申明过 ，因为无法得知上下文 。因为不影响执行效果 ，先注释掉它 ex.printStackTrace();
}

}

// 将窗口掉离出屏幕以获得纯粹的背景图象
public void refresh() {
if (start == true) {
this.updateBackground();
frame.setLocation(p);
if (p.x < 0 || p.y < 0)
frame.setLocation(0, 0);
this.repaint();
}
}

public void componentHidden(ComponentEvent e) {
System.out.println("Hidden");
}

// 窗口移动时
public void componentMoved(ComponentEvent e) {
System.out.println("moved");
this.repaint();
}

// 窗口改变大小时
public void componentResized(ComponentEvent e) {
System.out.println("resized");
this.repaint();
}

public void componentShown(ComponentEvent e) {
System.out.println("shown");
}

// 窗口得到焦点后,用refresh()方法更新界面
public void windowGainedFocus(WindowEvent e) {
System.out.println("gainedFocus");
refresh();
start = false;
}

// 窗口失去焦点后,将其移出屏幕
public void windowLostFocus(WindowEvent e) {
System.out.println("lostFocus");
if (frame.isShowing() == true) {
System.out.println("visible");
} else {
System.out.println("invisible");
}
start = true;
p = frame.getLocation();
frame.setLocation(-2000, -2000);
}

public TestEvent(JFrame frame) {
super();
this.frame = frame;
updateBackground();
this.setSize(200, 120);
this.setVisible(true);
frame.addComponentListener(this);
frame.addWindowFocusListener(this);

}

// 绘制外观,注意,其中 pos,offset 是为了将特定部分的图象贴到窗口上
public void paintComponent(Graphics g) {
Point pos = this.getLocationOnScreen();
Point offset = new Point(-pos.x, -pos.y);
g.drawImage(background, offset.x, offset.y, null);
}

/**
* @param args
*/
public static void main(String[] args) {
try {
// UIManager.setLookAndFeel("org.fife.plaf.Office2003.Office2003LookAndFeel");
// UIManager.setLookAndFeel("org.fife.plaf.OfficeXP.OfficeXPLookAndFeel");
// UIManager.setLookAndFeel("org.fife.plaf.OfficeXP.OfficeXPLookAndFeel");
UIManager.setLookAndFeel("com.birosoft.liquid.LiquidLookAndFeel");
LiquidLookAndFeel.setLiquidDecorations(true);
// LiquidLookAndFeel.setLiquidDecorations(true, "mac");
// UIManager.setLookAndFeel(new SubstanceLookAndFeel());
// UIManager.setLookAndFeel(new SmoothLookAndFeel());
// UIManager.setLookAndFeel(new QuaquaLookAndFeel());
// UIManager.put("swing.boldMetal", false);
if (System.getProperty("substancelaf.useDecorations") == null) {
JFrame.setDefaultLookAndFeelDecorated(true);
// JDialog.setDefaultLookAndFeelDecorated(true);
}
System.setProperty("sun.awt.noerasebackground", "true");
// SubstanceLookAndFeel.setCurrentTheme(new
// SubstanceLightAquaTheme());

// UIManager.setLookAndFeel("org.fife.plaf.VisualStudio2005.VisualStudio2005LookAndFeel");
} catch (Exception e) {
System.err.println("Oops! Something went wrong!");
}

JFrame frame = new JFrame("Transparent Window");
TestEvent t = new TestEvent(frame);
t.setLayout(new BorderLayout());
JButton button = new JButton("This is a button");
t.add("North", button);
JLabel label = new JLabel("This is a label");
t.add("South", label);
frame.getContentPane().add("Center", t);
frame.pack();
frame.setSize(150, 100);
frame.show();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
// t.start=true;
}

}