[英]Clear graphics from JPanel with ActionListener
我的问题是,如何通过再次运行OtherPanel来使用我的动作侦听器清除图形并创建一组新的图形?
public class MainFrame extends JFrame
{
private OtherPanel panel;
public MainFrame()
{
panel = new OtherPanel();
}
class OtherPanel extends JPanel
{
private OtherPanel()
{
...
}
public void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2d = (Graphics2D) g;
....
}
private class ReloadListener implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
}
}
}
class OtherPanel extends JPanel
{
private boolean isReset;
private OtherPanel()
{
...
}
public void paintComponent(Graphics g) {
super.paintComponent(g);
if(!isReset){
//your painting code here
}
}
public void setReset(boolean reset){
isReset = reset;
}
private class ReloadListener implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
setReset(true);
repaint();
}
}
}
一切都取决于“重置”面板应该如何。 我只是将super.paintComponent()
作为默认外观,你可能想要改变它。 当你想在面板上绘制某些东西时,不要忘记在你的代码中添加setReset(false)
。
private class ReloadListener implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
newPic();
panel.updateUI();
}
public MainFrame newPic()
{
return new MainFrame();
}
}
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