Adds a hot key to the containing window of a Swing component. - Java Swing

Java examples for Swing:JComponent

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Description

Adds a hot key to the containing window of a Swing component.

Demo Code


//package com.java2s;

import java.awt.event.KeyEvent;

import javax.swing.AbstractButton;
import javax.swing.Action;
import javax.swing.InputMap;

import javax.swing.JComponent;

import javax.swing.JMenuItem;

import javax.swing.KeyStroke;

public class Main {
    /**//  w ww  .  j  ava 2s.co m
     * Adds a <ctrl> hot key to the containing window of a component.
     * In the case of buttons and menu items it also attaches the given action to the component itself.
     * 
     * @param key one of the KeyEvent keyboard constants
     * @param to component to map to
     * @param actionName unique action name for the component's action map
     * @param action callback to notify when control key is pressed
     */
    public static void addHotKey(int key, JComponent to, String actionName,
            Action action) {
        addHotKey(KeyStroke.getKeyStroke(key, key == KeyEvent.VK_ESCAPE ? 0
                : java.awt.event.InputEvent.CTRL_MASK), to, actionName,
                action);
    }

    public static void addHotKey(KeyStroke keystroke, JComponent to,
            String actionName, Action action) {
        InputMap map = to.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW);
        map.put(keystroke, actionName);
        to.getActionMap().put(actionName, action);
        if (to instanceof JMenuItem)
            ((JMenuItem) to).setAccelerator(keystroke);
        if (to instanceof AbstractButton) // includes JMenuItem
            ((AbstractButton) to).addActionListener(action);
    }
}

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