gov.nasa.arc.spife.ui.timeline.action.AbstractZoomViewAction.java Source code

Introduction

Here is the source code for gov.nasa.arc.spife.ui.timeline.action.AbstractZoomViewAction.java

Source

/*******************************************************************************
 * Copyright 2014 United States Government as represented by the
 * Administrator of the National Aeronautics and Space Administration.
 * All Rights Reserved.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 ******************************************************************************/
package gov.nasa.arc.spife.ui.timeline.action;

import gov.nasa.arc.spife.ui.timeline.Timeline;
import gov.nasa.ensemble.common.logging.LogUtil;

import java.util.Collections;

import org.eclipse.core.commands.Command;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.gef.editparts.ZoomListener;
import org.eclipse.jface.action.Action;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.swt.graphics.Image;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.commands.ICommandService;

public abstract class AbstractZoomViewAction extends Action implements ZoomListener {

    private static final ICommandService commandService = (ICommandService) PlatformUI.getWorkbench()
            .getService(ICommandService.class);

    private final Command command;
    protected final Timeline<?> timeline;

    public AbstractZoomViewAction(Timeline<?> timeline, String cmdId, Image image) {
        this.timeline = timeline;
        this.command = commandService.getCommand(cmdId);
        setImageDescriptor(ImageDescriptor.createFromImage(image));
        timeline.getZoomManager().addZoomListener(this);
    }

    @Override
    public void run() {
        try {
            command.executeWithChecks(new ExecutionEvent(command, Collections.emptyMap(), null, null));
            updateEnablement();
        } catch (Exception e) {
            LogUtil.error(e);
        }
    }

    @Override
    public void zoomChanged(double zoom) {
        this.updateEnablement();
    }

    abstract protected void updateEnablement();
}