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java 将动作和名字绑定
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简介
AbstractAction 抽象动作 将动作和名字绑定
code
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class ActionFrame extends JFrame {
private JPanel buttonPanel;
private static final int DEFAULT_WIDTH = 300;
private static final int DEFAULT_HEIGHT = 200;
public ActionFrame() {
setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);
buttonPanel = new JPanel();
// define actions
Action yellowAction = new ColorAction("Yellow", new ImageIcon("test.gif"), Color.YELLOW);
Action blueAction = new ColorAction("Blue", new ImageIcon("test.gif"), Color.BLUE);
Action redAction = new ColorAction("Red", new ImageIcon("test.gif"), Color.RED);
// add buttons for these actions
buttonPanel.add(new JButton(yellowAction));
buttonPanel.add(new JButton(blueAction));
buttonPanel.add(new JButton(redAction));
// add panel to frame
add(buttonPanel);
// assciate the Y, B, and R keys with names
InputMap imap = buttonPanel.getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT);
imap.put(KeyStroke.getKeyStroke("ctrl Y"), "panel.yellow");
imap.put(KeyStroke.getKeyStroke("ctrl B"), "panel.blue");
imap.put(KeyStroke.getKeyStroke("ctrl R"), "panel.red");
// associate the names with actions
ActionMap amap = buttonPanel.getActionMap();
amap.put("panel.yellow", yellowAction);
amap.put("panel.blue", blueAction);
amap.put("panel.red", redAction);
}
public class ColorAction extends AbstractAction { // core
public ColorAction(String name, Icon icon, Color c) {
putValue(Action.NAME, name);
putValue(Action.SMALL_ICON, icon);
putValue(Action.SHORT_DESCRIPTION, "Set panel color to " + name.toLowerCase());
putValue("color", c);
}
public void actionPerformed(ActionEvent event) {
Color c = (Color) getValue("color");
buttonPanel.setBackground(c);
}
}
}
原文:https://www.cnblogs.com/eat-too-much/p/13905836.html
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