Question

如何通过监听器从网格面板更新组件？

我有以下问题：我以这种方式创建一个网格表

public class gui {

JPanel gridPanel = new JPanel();
JPanel background = new JPanel();
JLayeredPane layeredPanel = new JLayeredPane();
...

public gui{
...
for(int i=0; i<2; i++){
            JPanel panel= new JPanel(new BorderLayout());
            panel.setOpaque(false);
            gridPanel.add(panel);
            }


gridPanel.setOpaque(false);
layered.add(background,new Integer(1));
layered.add(gridPanel, new Integer(2));

JButton piece = new JButton( new ImageIcon("an image"));
JPanel panel = (JPanel)gridPanel.getComponent(0);
panel.add(piece);
...
}

好的，这很好，但是我想添加一个允许更新gridPanel的JButton动作监听器，我想在我的GUI构建器中添加它：

piece.addActionListener(new Listener(this));

我以这种方式创建一个新的ActionListener类：

public class Listener implements ActionListener{
private gui gui1;
public movimentoListener(gui gui1){
    gui1=gui;       
}
public void actionPerformed(ActionEvent e){
    JButton piece = new JButton( new ImageIcon("an other image"));
            JPanel panel = (JPanel)getGridPanel().getComponent(1); //obviously I've created getGridPanel
            panel.add(piece);
            gui.getGridPanel().repaint()
}
}

我希望当我按下按钮时actionPerformed用新图片更改我gridPanel的组件1，但此代码不起作用，我尝试在网上搜索但我已经找不到解决方案。

Answer 1

看看这些主题：

CardLayout display Next panel - java Swing

java swing dynamically adding components

希望它对你有所帮助。

通过监听器从网格面板更新组件

1 个答案: