com.opera.widgets.ui.editor.labelprovider.IconsLabelProvider.java Source code

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Here is the source code for com.opera.widgets.ui.editor.labelprovider.IconsLabelProvider.java

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/*******************************************************************************
 * Copyright (c) 2010-2011 Opera Software.
 * 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
 *
 * Contributors:
 *     Opera Software - initial API and implementation
 *******************************************************************************/

package com.opera.widgets.ui.editor.labelprovider;

import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IProject;
import org.eclipse.jface.viewers.ITableLabelProvider;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.ImageData;
import org.eclipse.swt.widgets.Display;

import com.opera.widgets.core.widget.Icon;

/**
 * Label provider for icons list.
 * 
 * @author Michal Borek
 */
public class IconsLabelProvider extends LabelProvider implements ITableLabelProvider {

    private static final String SRC_PATH = "src/"; //$NON-NLS-1$
    IProject fProject;

    public IconsLabelProvider(IProject project) {
        this.fProject = project;
    }

    public String getColumnText(Object obj, int index) {
        Icon icon = (Icon) obj;
        switch (index) {
        case 0:
            return icon.getPath();
        case 1:
            return (icon.getWidth() != null) ? icon.getWidth().toString() : Messages.IconsLabelProvider_Auto;
        case 2:
            return (icon.getHeight() != null) ? icon.getHeight().toString() : Messages.IconsLabelProvider_Auto;
        }
        return null;
    }

    public Image getColumnImage(Object obj, int index) {
        if (index != 0) {
            return null;
        }

        Icon icon = (Icon) obj;

        if (fProject == null || icon.getPath() == null) {
            return null;
        }

        IFile iconFile = fProject.getFile(SRC_PATH + icon.getPath());
        if (iconFile.exists()) {
            String iconPath = iconFile.getLocation().toString(); //$NON-NLS-1$
            Image image = new Image(Display.getCurrent(), iconPath);
            ImageData imageData = image.getImageData();
            double scaleFactor = 20.0f / (float) Math.max(imageData.width, imageData.height);
            GC gc = new GC(Display.getCurrent());
            try {
                gc.setInterpolation(SWT.HIGH);
            } catch (Exception e) {

            }
            imageData = imageData.scaledTo((int) (imageData.width * scaleFactor),
                    (int) (imageData.height * scaleFactor));
            return new Image(Display.getCurrent(), imageData);
        } else {
            return null;
        }
    }
}