jxhyperlink.java

来自「java实现浏览器等本地桌面的功能」· Java 代码 · 共 169 行

/*
 * $Id: JXHyperlink.java,v 1.7 2005/10/12 11:26:54 kleopatra Exp $
 *
 * Copyright 2004 Sun Microsystems, Inc., 4150 Network Circle,
 * Santa Clara, California 95054, U.S.A. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
package org.jdesktop.swingx;

import java.awt.Color;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;

import javax.swing.Action;
import javax.swing.JButton;

import org.jdesktop.swingx.plaf.JXHyperlinkAddon;
import org.jdesktop.swingx.plaf.LookAndFeelAddons;

/**
 * A hyperlink component that derives from JButton to provide compatibility
 * mostly for binding actions enabled/disabled behavior accesility i18n etc...
 * 
 * @author Richard Bair
 * @author Shai Almog
 * @author Jeanette Winzenburg
 */
public class JXHyperlink extends JButton {

    /**
     * @see #getUIClassID
     * @see #readObject
     */
    public static final String uiClassID = "HyperlinkUI";

    // ensure at least the default ui is registered
    static {
      LookAndFeelAddons.contribute(new JXHyperlinkAddon());
    }

    private boolean hasBeenVisited = false;

    /**
     * Color for the hyper link if it has not yet been clicked. This color can
     * be set both in code, and through the UIManager with the property
     * "JXHyperlink.unclickedColor".
     */
    private Color unclickedColor = new Color(0, 0x33, 0xFF);

    /**
     * Color for the hyper link if it has already been clicked. This color can
     * be set both in code, and through the UIManager with the property
     * "JXHyperlink.clickedColor".
     */
    private Color clickedColor = new Color(0x99, 0, 0x99);

    /** Creates a new instance of JXHyperlink */
    public JXHyperlink() {
        super();
    }

    public JXHyperlink(Action action) {
        super(action);
        init();
    }

    /**
     * @return
     */
    public Color getUnclickedColor() {
        return unclickedColor;
    }

    /**
     * @param color
     */
    public void setClickedColor(Color color) {
        Color old = getClickedColor();
        clickedColor = color;
        if (isVisited()) {
            setForeground(getClickedColor());
        }
        firePropertyChange("clickedColor", old, getClickedColor());
    }

    /**
     * @return
     */
    public Color getClickedColor() {
        return clickedColor;
    }

    /**
     * @param color
     */
    public void setUnclickedColor(Color color) {
        Color old = getUnclickedColor();
        unclickedColor = color;
        if (!isVisited()) {
            setForeground(getUnclickedColor());
        }
        firePropertyChange("unclickedColor", old, getUnclickedColor());
    }

    protected void setVisited(boolean visited) {
        boolean old = isVisited();
        hasBeenVisited = visited;
        setForeground(isVisited() ? getClickedColor() : getUnclickedColor());
        firePropertyChange("visited", old, isVisited());
    }

    protected boolean isVisited() {
        return hasBeenVisited;
    }

    protected PropertyChangeListener createActionPropertyChangeListener(
            final Action a) {
        final PropertyChangeListener superListener = super
                .createActionPropertyChangeListener(a);
        // JW: need to do something better - only weak refs allowed!
        // no way to hook into super
        PropertyChangeListener l = new PropertyChangeListener() {

            public void propertyChange(PropertyChangeEvent evt) {
                if (LinkModel.VISITED_PROPERTY.equals(evt.getPropertyName())) {
                    setVisitedFromActionProperty(a);
                } else {
                    superListener.propertyChange(evt);
                }

            }

        };
        return l;
    }

    protected void configurePropertiesFromAction(Action a) {
        super.configurePropertiesFromAction(a);
        setVisitedFromActionProperty(a);
    }

    private void setVisitedFromActionProperty(Action a) {
        Boolean visited = (Boolean) a.getValue(LinkModel.VISITED_PROPERTY);
        setVisited(visited != null ? visited.booleanValue() : false);
    }

    private void init() {
        setForeground(isVisited() ? getClickedColor() : getUnclickedColor());
    }

    public String getUIClassID() {
        return uiClassID;
    }

}