最初は、JInternalFrameのタイトルバーが非表示になっています(((BasicInternalFrameUI) iw.getUI()).setNorthPane(null)
)。マウスがフレーム枠に入るとすぐに、ボーダーまたはタイトルバー自体がmouseExitを発するまでタイトルバーを再度表示したいと思います。JInternalFrameはタイトルバーを動的に表示および非表示にします
これが私の最初の試験であった:
public class InternalWindow extends JInternalFrame{
public InternalWindow(){
((BasicInternalFrameUI) iw.getUI()).setNorthPane(null);
setResizable(true);
setVisible(true);
addMouseListener(new MouseAdapter() {
@Override
public void mouseEntered(MouseEvent e) {
((BasicInternalFrameUI) iw.getUI()).setNorthPane(new BasicInternalFrameTitlePane(iw));
((BasicInternalFrameUI) iw.getUI()).getNorthPane().revalidate();
((BasicInternalFrameUI) iw.getUI()).getNorthPane().repaint();
setFrameIcon(null);
revalidate();
repaint();
((BasicInternalFrameUI) iw.getUI()).getNorthPane().addMouseListener(new MouseAdapter() {
@Override
public void mouseExited(MouseEvent e) {
((BasicInternalFrameUI) iw.getUI()).setNorthPane(null);
revalidate();
repaint();
}
});
}
@Override
public void mouseExited(MouseEvent e) {
((BasicInternalFrameUI) iw.getUI()).setNorthPane(null);
revalidate();
repaint();
}
});
}
}
しかし、その後、タイトルバーが正しく描画されないとの相互作用に反応しません。タイトルバーが正しく描画される。この方法を
public class InternalWindow extends JInternalFrame{
public InternalWindow(){
((BasicInternalFrameUI) iw.getUI()).setNorthPane(null);
setResizable(true);
setVisible(true);
addMouseListener(new MouseAdapter() {
@Override
public void mouseEntered(MouseEvent e) {
updateUI();
setFrameIcon(null);
((BasicInternalFrameUI) iw.getUI()).getNorthPane().addMouseListener(new MouseAdapter() {
@Override
public void mouseExited(MouseEvent e) {
((BasicInternalFrameUI) iw.getUI()).setNorthPane(null);
revalidate();
repaint();
}
});
}
@Override
public void mouseExited(MouseEvent e) {
((BasicInternalFrameUI) iw.getUI()).setNorthPane(null);
revalidate();
repaint();
}
});
}
}
が、そのためAWT-EventQueueのはのmouseExitedが呼ばれるように国境に添付防ぐ例外がスローされます:(picture here)
は、だから私はそれを別の方法を試してみました
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at javax.swing.plaf.basic.BasicInternalFrameUI.updateFrameCursor(BasicInternalFrameUI.java:317)
at javax.swing.plaf.basic.BasicInternalFrameUI$BorderListener.mouseEntered(BasicInternalFrameUI.java:1086)
at java.awt.AWTEventMulticaster.mouseEntered(AWTEventMulticaster.java:300)
at java.awt.Component.processMouseEvent(Component.java:6544)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
at java.awt.Component.processEvent(Component.java:6300)
at java.awt.Container.processEvent(Container.java:2236)
at java.awt.Component.dispatchEventImpl(Component.java:4891)
at java.awt.Container.dispatchEventImpl(Container.java:2294)
at java.awt.Component.dispatchEvent(Component.java:4713)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4888)
at java.awt.LightweightDispatcher.retargetMouseEnterExit(Container.java:4676)
at java.awt.LightweightDispatcher.trackMouseEnterExit(Container.java:4654)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4505)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4466)
at java.awt.Container.dispatchEventImpl(Container.java:2280)
at java.awt.Window.dispatchEventImpl(Window.java:2750)
at java.awt.Component.dispatchEvent(Component.java:4713)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
at java.awt.EventQueue$4.run(EventQueue.java:731)
at java.awt.EventQueue$4.run(EventQueue.java:729)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
タイトルバーを動的に非表示にする簡単な方法はありませんか?