Example usage for javax.swing.plaf ComponentInputMapUIResource ComponentInputMapUIResource

Introduction

In this page you can find the example usage for javax.swing.plaf ComponentInputMapUIResource ComponentInputMapUIResource.

Prototype

public ComponentInputMapUIResource(JComponent component) 

Source Link

Document

Constructs a ComponentInputMapUIResource .

Usage

From source file:Main.java

/**
 * A helper for creating and updating key bindings for components with
 * mnemonics. The {@code pressed} action will be invoked when the mnemonic
 * is activated and the {@code released} action will be invoked when the
 * mnemonic is deactivated./* ww w  .j av a  2s . c  om*/
 * <p>
 * TODO establish an interface for the mnemonic properties, such as {@code
 * MnemonicEnabled} and change signature to {@code public static <T extends
 * JComponent & MnemonicEnabled> void updateMnemonicBinding(T c, String
 * pressed, String released)}
 * 
 * @param c
 *            the component bindings to update
 * @param pressed
 *            the name of the action in the action map to invoke when the
 *            mnemonic is pressed
 * @param released
 *            the name of the action in the action map to invoke when the
 *            mnemonic is released (if the action is a toggle style, then
 *            this parameter should be {@code null})
 * @throws NullPointerException
 *             if the component is {@code null}
 */
public static void updateMnemonicBinding(JComponent c, String pressed, String released) {
    Class<?> clazz = c.getClass();
    int m = -1;

    try {
        Method mtd = clazz.getMethod("getMnemonic");
        m = (Integer) mtd.invoke(c);
    } catch (RuntimeException e) {
        throw e;
    } catch (Exception e) {
        throw new IllegalArgumentException("unable to access mnemonic", e);
    }

    InputMap map = SwingUtilities.getUIInputMap(c, JComponent.WHEN_IN_FOCUSED_WINDOW);

    if (m != 0) {
        if (map == null) {
            map = new ComponentInputMapUIResource(c);
            SwingUtilities.replaceUIInputMap(c, JComponent.WHEN_IN_FOCUSED_WINDOW, map);
        }

        map.clear();

        //TODO is ALT_MASK right for all platforms?
        map.put(KeyStroke.getKeyStroke(m, InputEvent.ALT_MASK, false), pressed);
        map.put(KeyStroke.getKeyStroke(m, InputEvent.ALT_MASK, true), released);
        map.put(KeyStroke.getKeyStroke(m, 0, true), released);
    } else {
        if (map != null) {
            map.clear();
        }
    }
}

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