org.oxbow.swingbits.action.ActionDropDownMenu Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of swingbits Show documentation
A collection of useful components and utilities for Java Swing Toolkit
There is a newer version: 1.3.2
/*
 * Copyright (c) 2009-2011, EzWare
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.Redistributions
 * in binary form must reproduce the above copyright notice, this list of
 * conditions and the following disclaimer in the documentation and/or
 * other materials provided with the distribution.Neither the name of the
 * EzWare nor the names of its contributors may be used to endorse or
 * promote products derived from this software without specific prior
 * written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 */

package org.oxbow.swingbits.action;

import java.awt.Component;
import java.awt.event.ActionEvent;

import javax.swing.AbstractAction;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JPopupMenu;

import org.oxbow.swingbits.util.swing.CompoundIcon;

/**
 * An action representing a drop down menu.
 * Intended to be used for drop down buttons. 
 * When assigned to the button shows a pop up menu on click.
 * Also automatically adds "drop down" arrow icon to the right of action's icon.  
 * 
 * @author Eugene Ryzhikov
 *
 */
class ActionDropDownMenu extends AbstractAction {

    private static final long serialVersionUID = 1L;
    private static final Icon DROPDOWN_ICON =  new ImageIcon( ActionDropDownMenu.class.getResource("dropdown.png"));

    private JPopupMenu menu = null;
    private final ActionGroup action;

    /**
     * Action will create a pop up menu out of give ActionGroup
     * @param actionGroup
     */
    public ActionDropDownMenu( ActionGroup actionGroup ) {
        super( actionGroup.getName(), createIcon(actionGroup));
        this.action = actionGroup;
    }

    private static Icon createIcon( ActionGroup action ) {
        Icon mainIcon = action.getIcon();
        return mainIcon == null? DROPDOWN_ICON: new CompoundIcon(mainIcon, DROPDOWN_ICON);
    }
    
    @Override
    public void actionPerformed(ActionEvent e) {

        if ( !( e.getSource() instanceof Component ) ||
             action == null || action.isEmpty() ||
             !action.isEnabled() ) return;

        if ( menu == null ) {
            menu = ActionContainerBuilderFactory.getPopupMenuBuilder().build(action);
        }

        Component cmpt = (Component) e.getSource();
        menu.show( cmpt , 0, cmpt.getHeight() );

    }

}