ChangeZoomHandler.java

/*
* Copyright (C) 2012 The Android Open Source Project
*
* 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 com.motorola.studio.android.emulator.ui.handlers;

import java.util.Map;

import com.motorola.studio.android.emulator.ui.controls.IAndroidComposite;
import com.motorola.studio.android.emulator.ui.view.AndroidViewData;

public class ChangeZoomHandler extends AbstractZoomHandler
{
    /*
     * (non-Javadoc)
     * @see com.motorola.studio.android.emulator.ui.handlers.AbstractZoomHandler#getZoomFactor(java.util.Map)
     */
    @SuppressWarnings("rawtypes")
    @Override
    protected double getZoomFactor(Map parameter)
    {
        double zoomFactor = DEFAULT_ZOOM;
        String factorString = (String) parameter.get(ZOOM_FACTOR_PARAMETER);
        try
        {
            zoomFactor = Double.parseDouble(factorString);
        }
        catch (Exception e)
        {
            // Do nothing
            // The parameter can always be parsed
        }
        return zoomFactor;
    }

    /**
     * Tests if the current zoom factor is the one handled by this zoom handler
     * 
     * @param zoomFactor The active instance current zoom factor 
     * 
     * @return True if this handler handles the current zoom factor; false otherwise
     */
    @SuppressWarnings("rawtypes")
    @Override
    protected boolean testZoomFactor(AndroidViewData viewData, Map parameters, double zoomFactor)
    {
        boolean testResult = false;
        double expectedZoomFactor = getZoomFactor(parameters);
        if (expectedZoomFactor == zoomFactor)
        {
            testResult = true;
        }

        if (expectedZoomFactor == ZOOM_FIT)
        {
            if (viewData != null)
            {
                IAndroidComposite composite = viewData.getComposite();

                if (composite.isFitToWindowSelected())
                {
                    testResult = true;
                }
            }
        }

        return testResult;
    }
}