com.nokia.tools.screen.ui.actions.PlaySelectionAction.java Source code

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Here is the source code for com.nokia.tools.screen.ui.actions.PlaySelectionAction.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.screen.ui.actions;

import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.ui.IWorkbenchPart;

import com.nokia.tools.media.player.IPlayer;
import com.nokia.tools.screen.core.IScreenElement;
import com.nokia.tools.screen.core.JEMUtil;
import com.nokia.tools.screen.ui.UiPlugin;

public class PlaySelectionAction extends AbstractPlayAction {
    public static final String ID = "PLAY_SELECTION";

    /**
     * Constructs an action associated with the given part.
     * 
     * @param part the workbench part
     */
    public PlaySelectionAction(IWorkbenchPart part) {
        super(part);
        setId(ID);
        setText(Messages.PlayMedia_PlaySelection);
        setToolTipText(Messages.PlayMedia_PlaySelection);
        setImageDescriptor(UiPlugin.getImageDescriptor("icons/startanimsel.gif"));
        setDisabledImageDescriptor(UiPlugin.getImageDescriptor("icons/startanimsel_disabled.gif"));
        registerPlayAction();
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.jface.action.Action#run()
     */
    @Override
    protected void doRun() {
        PlayerController controller = getController();
        if (controller != null && !controller.isPlaying()) {
            IStructuredSelection sel = (IStructuredSelection) getSelection();
            controller.playSelection(sel);
        }
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.gef.ui.actions.WorkbenchPartAction#calculateEnabled()
     */
    @Override
    protected boolean calculateEnabled() {
        PlayerController controller = getController();
        if (controller == null) {
            return false;
        }

        if (controller.isPlaying() || controller.isPaused()) {
            return false;
        }

        IStructuredSelection sel = (IStructuredSelection) getSelection();

        if (sel == null) {
            return false;
        }

        for (Object element : sel.toArray()) {
            element = JEMUtil.getScreenElement(element);

            if (element != null && element instanceof IScreenElement) {
                IPlayer player = (IPlayer) ((IScreenElement) element).getAdapter(IPlayer.class);
                if (player != null && player.isPlayable()) {
                    return true;
                }
            }
        }

        return false;
    }

    protected ISelection getSelection() {
        return getWorkbenchPart().getSite().getSelectionProvider().getSelection();
    }
}