我正在尝试重叠JPanel
个实例。将面板直接放在另一个面板上,位置和尺寸完全相同。每次我这样做,它将另一个面板移动到另一侧或下面,前一个面板位于另一个更大的面板内,并且其中有按钮。
我该怎么做?请记住,它使用的是Window Builder工具。
答案 0 :(得分:9)
您可能还想查看OverlayLayout
,here。它不包含在传统的gallery中,但它可能是有意义的。
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.OverlayLayout;
/** @see http://stackoverflow.com/a/13437388/230513 */
public class OverlaySample {
public static void main(String args[]) {
JFrame frame = new JFrame("Overlay Sample");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel panel = new JPanel();
panel.setLayout(new OverlayLayout(panel));
panel.add(create(1, "One", Color.gray.brighter()));
panel.add(create(2, "Two", Color.gray));
panel.add(create(3, "Three", Color.gray.darker()));
frame.add(panel, BorderLayout.CENTER);
frame.pack();
frame.setLocationByPlatform(true);
frame.setVisible(true);
}
private static JLabel create(final int index, String name, Color color) {
JLabel label = new JLabel(name) {
private static final int N = 64;
@Override
public boolean isOpaque() {
return true;
}
@Override
public Dimension getPreferredSize() {
return new Dimension(index * N, index * N);
}
@Override
public Dimension getMaximumSize() {
return new Dimension(index * N, index * N);
}
};
label.setHorizontalAlignment(JLabel.RIGHT);
label.setVerticalAlignment(JLabel.BOTTOM);
label.setBackground(color);
label.setAlignmentX(0.0f);
label.setAlignmentY(0.0f);
return label;
}
}
答案 1 :(得分:5)
我正在尝试重叠JPanels
使用JLayeredPane
(链接教程中的下图)。
将JPanel直接放在另一个
上
..或CardLayout
显示为here ..
..取决于你指的是哪两个,因为我将它们理解为完全不同的效果。
答案 2 :(得分:4)
使用JDesktopPane
(或其超类JLayeredPane
)作为其内容,添加到窗格中。
How to Use Internal Frames见examples。
在这里你可以看到让组件覆盖的好方法,并在光标停留在它上面时弹出:
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class ShiftedStackPanel extends JPanel implements MouseListener,
ActionListener {
private static final long serialVersionUID = 1988454751139668485L;
private int layer;
private JDesktopPane desktopPane;
private Timer timer;
private Component currentComponent;
private int layerOfCurrent;
private int shiftDivision;
public ShiftedStackPanel() {
this(4);
}
public ShiftedStackPanel(int shift) {
shiftDivision = shift;
setLayout(new BorderLayout(0, 0));
desktopPane = new JDesktopPane();
desktopPane.setBackground(SystemColor.window);
super.add(desktopPane);
timer = new Timer(1000, this);
timer.setRepeats(false);
}
public Component add(Component c) {
Dimension dim = c.getPreferredSize();
c.setBounds(
(desktopPane.getComponentCount() * (dim.width / shiftDivision)),
0, dim.width, dim.height);
desktopPane.add(c, new Integer(++layer));
c.addMouseListener(this);
return c;
}
public void remove(Component c) {
throw new IllegalArgumentException(
"Removal of component, not yet supported.");
// FIXME: allow removal, and shift all latter comps, to left
}
public void removeAll() {
desktopPane.removeAll();
}
public static void main(String[] args) {
JFrame f = new JFrame("JFrame Wrapper");
ShiftedStackPanel p;
f.setContentPane(p = new ShiftedStackPanel(4));
p.add(new JTextField("ABCDEFGHI"));
p.add(new JTextField("DEFGHIJKL"));
p.add(new JTextField("GHIJKLMNO"));
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setVisible(true);
f.setMinimumSize(new Dimension(400, 200));
f.setLocationRelativeTo(null);
}
@Override
public void mouseClicked(MouseEvent evt) {
if (currentComponent != null) {
Component c = (Component) evt.getSource();
currentComponent = c;
layerOfCurrent = desktopPane.getLayer(c);
desktopPane.remove(c);
desktopPane.add(c, new Integer(100));
}
}
@Override
public void mouseEntered(MouseEvent evt) {
timer.start();
Component c = (Component) evt.getSource();
currentComponent = c;
layerOfCurrent = desktopPane.getLayer(c);
}
@Override
public void mouseExited(MouseEvent evt) {
if ((currentComponent != null) && currentComponent == evt.getSource()) {
desktopPane.remove(currentComponent);
desktopPane.add(currentComponent, new Integer(layerOfCurrent));
currentComponent = null;
timer.stop();
}
}
@Override
public void mousePressed(MouseEvent arg0) {
// TODO Auto-generated method stub
}
@Override
public void mouseReleased(MouseEvent arg0) {
// TODO Auto-generated method stub
}
@Override
public void actionPerformed(ActionEvent arg0) {
desktopPane.remove(currentComponent);
desktopPane.add(currentComponent, new Integer(100));
}
}
使用需要关注的组件时仍然存在一些问题,但应该与JLabel
和JPanel
配合使用。