我有一个JFrame
其中有2 JPanel
其中:a PaintPanel
(与paint()
方法)和ButtonPanel
(带按钮)。当我调用PaintPanel
的repaint()
(但单击按钮)ButtonPanel
的按钮正在绘制在PaintPanel
!它不是可点击或任何东西,它只是在那里。重绘时JButton被复制?
我试图重新使用这段代码的问题:
public class Main {
public static void main(String[] args) {
JFrame frame = new JFrame("frame");
frame.setSize(400,400);
frame.setLayout(new GridLayout(2,1));
PaintPanel paint = new PaintPanel();
ButtonPanel buttons = new ButtonPanel(paint);
frame.add(paint);
frame.add(buttons);
frame.setVisible(true);
}
}
public class PaintPanel extends JPanel{
public void paint(Graphics g){
g.drawRect(10, 10, 10, 10);
}
}
public class ButtonPanel extends JPanel implements ActionListener{
private PaintPanel paintPanel;
public ButtonPanel(PaintPanel paintPanel){
this.paintPanel=paintPanel;
JButton button = new JButton("button");
button.addActionListener(this);
add(button);
}
@Override
public void actionPerformed(ActionEvent arg0) {
paintPanel.repaint();
}
}
这重新前人的精力我有问题(对不起,奇码标记,似乎无法得到它的权利)。
我真的希望你一个人知道这里发生了什么,因为我不...
这种渲染物体往往不能兑现[透明度]出现( http://java.sun.com/products/jfc/tsc/articles/painting/index.html#props)属性。此外,“Swing程序应该重写'paintComponent()',而不是重写'paint()'。” - [* AWT和Swing中绘制:绘制方法*](http://java.sun.com/products/jfc /tsc/articles/painting/index.html#callbacks)。 – trashgod