ImagePositionBean.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.skin.android.parser;

import java.io.File;

import org.eclipse.swt.graphics.ImageData;
import org.eclipse.ui.PlatformUI;

/**
 * DESCRIPTION:
 * This class represents a node containing image, x and y data
 *
 * RESPONSIBILITY:
 * Represent image nodes of the layout file
 *
 * COLABORATORS:
 * None.
 *
 * USAGE:
 * This class is intended to be used by the LayoutFileParser and LayoutFileModel classes only
 */
public class ImagePositionBean implements ILayoutConstants, ILayoutBean
{
    /**
     * Name of the node
     */
    private String name;

    /**
     * Location of the file that contains the image
     */
    private File imageLocation;

    /**
     * X position where to draw the image
     */
    private String xPos;

    /**
     * Y position where to draw the image
     */
    private String yPos;

    private int width = -1;

    private int height = -1;

    /**
     * Constructor
     * Creates the node and assign a name to it
     */
    ImagePositionBean(String name)
    {
        this.name = name;
    }

    /**
     * Retrieves the image location
     * 
     * @return The image location
     */
    File getImageLocation()
    {
        return imageLocation;
    }

    /**
     * Retrieves the X position where to draw the image
     * 
     * @return The image X position
     */
    String getXPos()
    {
        return xPos;
    }

    /**
     * Retrieves the Y position where to draw the image
     * 
     * @return The image Y position
     */
    String getYPos()
    {
        return yPos;
    }

    int getWidth(File skinFilesPath)
    {
        if (width == -1)
        {
            populateWidthHeight(skinFilesPath);
        }

        return width;
    }

    int getHeight(File skinFilesPath)
    {
        if (width == -1)
        {
            populateWidthHeight(skinFilesPath);
        }

        return height;
    }

    /**
     * Retrieves the name of this node
     * 
     * @return The node name
     */
    String getName()
    {
        return name;
    }

    /*
     * (non-Javadoc)
     * @see java.lang.Object#toString()
     */
    @Override
    public String toString()
    {
        return "ImagePosition: " + name;
    }

    private void populateWidthHeight(final File skinFilesPath)
    {
        PlatformUI.getWorkbench().getDisplay().syncExec(new Runnable()
        {
            public void run()
            {
                ImageData id =
                        new ImageData(new File(skinFilesPath, imageLocation.getName())
                                .getAbsolutePath());
                width = id.width;
                height = id.height;
            }
        });
    }

    /*
     * (non-Javadoc)
     * @see com.motorola.studio.android.emulator.skin.android.parser.ILayoutBean#setKeyValue(java.lang.String, java.lang.String)
     */
    public void setKeyValue(String key, String value)
    {
        if (ATTR_IMAGE.equals(key))
        {
            imageLocation = new File(value);
        }
        else if (ATTR_X.equals(key))
        {
            xPos = value;
        }
        else if (ATTR_Y.equals(key))
        {
            yPos = value;
        }
    }
}