com.ecfeed.ui.common.ImageManager.java Source code

Introduction

Here is the source code for com.ecfeed.ui.common.ImageManager.java

Source

/*******************************************************************************
 *
 * Copyright (c) 2016 ecFeed AS.                                                
 * All rights reserved. This program and the accompanying materials              
 * are made available under the terms of the Eclipse Public License v1.0         
 * which accompanies this distribution, and is available at                      
 * http://www.eclipse.org/legal/epl-v10.html 
 *  
 *******************************************************************************/

package com.ecfeed.ui.common;

import java.net.URL;
import java.util.HashMap;
import java.util.Map;

import org.eclipse.core.runtime.FileLocator;
import org.eclipse.core.runtime.Path;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.swt.graphics.Image;
import org.osgi.framework.Bundle;
import org.osgi.framework.FrameworkUtil;

public class ImageManager {

    public static final String ICONS_FOLDER_NAME = "icons";

    private static ImageManager fInstance;
    private Map<String, ImageDescriptor> fDescriptors;
    private Map<String, Image> fImages;

    public static ImageManager getInstance() {
        if (fInstance == null) {
            fInstance = new ImageManager();
        }
        return fInstance;
    }

    public ImageDescriptor getImageDescriptor(String fileName) {
        String path = Constants.ICONS_FOLDER_NAME + "/" + fileName;
        if (fDescriptors.containsKey(path) == false) {
            Bundle bundle = FrameworkUtil.getBundle(this.getClass());
            URL url = FileLocator.find(bundle, new Path(path), null);
            fDescriptors.put(path, ImageDescriptor.createFromURL(url));
        }
        return fDescriptors.get(path);
    }

    public Image getImage(String fileName) {
        Image image = fImages.get(fileName);
        if (image == null) {
            fImages.put(fileName, getImageDescriptor(fileName).createImage());
        }
        return fImages.get(fileName);
    }

    private ImageManager() {
        fDescriptors = new HashMap<>();
        fImages = new HashMap<>();
    }
}