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[英]Java Swing mousePressed and getSource() not showing drawed shapes on JPanel
[英]MouseListener: Determine if mousePressed .getSource() == MouseReleased .getSource()
如何检查用户是否在按下鼠标的同一个按钮上释放鼠标?
我想处理用户单击button1
,继续按住鼠标按钮,然后拖动到button2
并在button2
上释放鼠标的情况,其中button1
和button2
是我添加了 MouseListeners 的 JButtons。
即:如果用户单击
button1
,然后在button1
上释放鼠标,则执行action1()
。并且:如果用户单击
button1
,然后在button2
上释放鼠标,则什么都不做。
我试过检查ePressed.getSource() == eReleased.getSource()
,但拖动鼠标后源似乎保持不变。
见下文:
// My thoughts are that if the button is released on the source it was
// pressed, it should print "test", however "test" prints even if I
// drag the mouse outside of the bounds of the button and release it
public JButton getSqaure() {
JButton jb = new JButton();
jb.addMouseListener(new MouseAdapter() {
boolean pressed = false;
@Override
public void mousePressed(MouseEvent e) {
if (SwingUtilities.isRightMouseButton(e)) {
pressed = true;
}
}
@Override
public void mouseReleased(MouseEvent e) {
if (e.getSource() == jb && pressed) {
System.out.println("test");
}
pressed = false;
}
});
jb.setPreferredSize(new Dimension(50,50));
return jb;
}
当然 - 我已经回答了我自己的问题:
@Override
public void mouseExited(MouseEvent e) {
pressed = false;
}
@Override
public void mouseEntered(MouseEvent e) {
pressed = true;
}
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