org.openscada.vi.ui.draw2d.primitives.ImageController.java Source code

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Here is the source code for org.openscada.vi.ui.draw2d.primitives.ImageController.java

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/*
 * This file is part of the openSCADA project
 * Copyright (C) 2006-2012 TH4 SYSTEMS GmbH (http://th4-systems.com)
 *
 * openSCADA is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License version 3
 * only, as published by the Free Software Foundation.
 *
 * openSCADA is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License version 3 for more details
 * (a copy is included in the LICENSE file that accompanied this code).
 *
 * You should have received a copy of the GNU Lesser General Public License
 * version 3 along with openSCADA. If not, see
 * <http://opensource.org/licenses/lgpl-3.0.html> for a copy of the LGPLv3 License.
 */

package org.openscada.vi.ui.draw2d.primitives;

import java.net.MalformedURLException;
import java.net.URL;

import org.eclipse.draw2d.FigureCanvas;
import org.eclipse.draw2d.IFigure;
import org.eclipse.draw2d.Label;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.resource.ResourceManager;
import org.openscada.vi.model.VisualInterface.Image;
import org.openscada.vi.ui.draw2d.SymbolController;

public class ImageController extends FigureController {
    private final Label figure;

    private ImageDescriptor currentImage;

    public ImageController(final FigureCanvas canvas, final SymbolController controller, final Image element,
            final ResourceManager manager) {
        super(controller, manager);

        this.figure = new Label() {
            @Override
            public void addNotify() {
                super.addNotify();
                start();
            }

            @Override
            public void removeNotify() {
                stop();
                super.removeNotify();
            }
        };
        controller.addElement(element, this);

        applyCommon(element);
        setImage(element.getUri());
    }

    @Override
    public void setOpaque(final Boolean flag) {
        setOpaque(flag, true);
    }

    public void setImage(final String uri) {
        if (this.currentImage != null) {
            this.manager.destroyImage(this.currentImage);
            this.currentImage = null;
        }

        if (uri == null || uri.isEmpty()) {
            this.figure.setIcon(null);
        } else {
            try {
                this.figure.setIcon(this.manager
                        .createImageWithDefault(this.currentImage = ImageDescriptor.createFromURL(new URL(uri))));
            } catch (final MalformedURLException e) {
                this.figure
                        .setIcon(this.manager.createImageWithDefault(ImageDescriptor.getMissingImageDescriptor()));
            }
        }
    }

    @Override
    protected IFigure getPropertyFigure() {
        return this.figure;
    }
}