com.nokia.tools.s60.editor.ui.views.AddEffectDropDown.java Source code

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Here is the source code for com.nokia.tools.s60.editor.ui.views.AddEffectDropDown.java

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/*
* Copyright (c) 2006-2010 Nokia Corporation and/or its subsidiary(-ies). 
* All rights reserved.
* This component and the accompanying materials are made available
* under the terms of "Eclipse Public License v1.0"
* which accompanies this distribution, and is available
* at the URL "http://www.eclipse.org/legal/epl-v10.html".
*
* Initial Contributors:
* Nokia Corporation - initial contribution.
*
* Contributors:
*
* Description:
*
*/
package com.nokia.tools.s60.editor.ui.views;

import java.util.List;

import org.eclipse.jface.action.Action;
import org.eclipse.jface.action.ActionContributionItem;
import org.eclipse.jface.action.IMenuCreator;
import org.eclipse.jface.action.Separator;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Menu;

import com.nokia.tools.media.utils.IMediaConstants;
import com.nokia.tools.media.utils.layers.ILayer;
import com.nokia.tools.media.utils.layers.ILayerEffect;
import com.nokia.tools.s60.editor.actions.layers.ILayerActionsHost;
import com.nokia.tools.s60.ide.S60WorkspacePlugin;

public class AddEffectDropDown extends Action implements IMenuCreator {

    private ILayerActionsHost page;

    private Menu menu;

    /**
     * Construxts an action.
     * 
     * @param view
     *            the current icon page.
     */
    public AddEffectDropDown(ILayerActionsHost view) {
        this.page = view;
        setToolTipText(Messages.Layers_AddEffectAction_title);
        setText(Messages.Layers_AddEffectAction_title);
        setImageDescriptor(S60WorkspacePlugin.getImageDescriptor("icons/etool16/add_effect16x16.gif"));
        setDisabledImageDescriptor(S60WorkspacePlugin.getImageDescriptor("icons/dtool16/add_effect16x16.gif"));
        setMenuCreator(this);
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.jface.action.IMenuCreator#dispose()
     */
    public void dispose() {
        if (menu != null) {
            menu.dispose();
        }
    }

    /*   
     * (non-Javadoc)
     * 
     * @see org.eclipse.jface.action.IMenuCreator#getMenu(org.eclipse.swt.widgets.Control)
     */
    public Menu getMenu(Control parent) {
        if (menu != null) {
            menu.dispose();
        }
        menu = new Menu(parent);
        _build();
        return menu;
    }

    private void _build() {
        IStructuredSelection sel = (IStructuredSelection) page.getSelection();
        if (!sel.isEmpty()) {
            if (sel.getFirstElement() instanceof ILayer) {
                ILayer layer = (ILayer) sel.getFirstElement();
                List<ILayerEffect> effects = layer.getLayerEffects();
                final List<ILayerEffect> availableEffects = layer.getAvailableLayerEffects();
                Separator betweenLayerSep = null;
                boolean actionAdded = false;
                for (ILayerEffect a : effects) {
                    AddEffectAction action = new AddEffectAction(a, availableEffects);
                    if (action.isEnabled()) {
                        //                     separator before  ChannelBlend
                        if (actionAdded)
                            if (a.getName().equals(IMediaConstants.CHANNELBLENDING)
                                    || a.getName().equals(IMediaConstants.ALPHABLENDING)) {
                                if (betweenLayerSep == null) {
                                    betweenLayerSep = new Separator();
                                    betweenLayerSep.fill(menu, -1);
                                }
                            }
                        ActionContributionItem item = new ActionContributionItem(action);
                        item.fill(menu, -1);
                        actionAdded = true;
                    }
                }
            }
        }
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.jface.action.IMenuCreator#getMenu(org.eclipse.swt.widgets.Menu)
     */
    public Menu getMenu(Menu parent) {
        if (menu != null) {
            menu.dispose();
        }
        menu = new Menu(parent);
        _build();
        return menu;
    }
}