[英]Update a component from a grid panel through a Listener
如何通過偵聽器從網格面板更新組件?
我有以下問題:以這種方式創建表格
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,這很好,但是我想向JButton添加一個動作偵聽器,以允許更新gridPanel
,我想到在我的GUI生成器中添加此內容:
piece.addActionListener(new Listener(this));
我以這種方式創建一個新的類ActionListener:
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()
}
}
我想當我按下按鈕actionPerformed
用新圖像更改gridPanel
的組件1,但是此代碼不起作用,我嘗試在網上搜索,但沒有找到解決方案。
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