org.eclipse.scada.vi.ui.draw2d.primitives.ImageController.java Source code

Introduction

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

Source

/*******************************************************************************
 * Copyright (c) 2011, 2014 TH4 SYSTEMS GmbH and others.
 * 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:
 *     TH4 SYSTEMS GmbH - initial API and implementation
 *     Jens Reimann - additional work
 *     IBH SYSTEMS - extend image alignment
 *******************************************************************************/
package org.eclipse.scada.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.draw2d.PositionConstants;
import org.eclipse.emf.common.util.URI;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.resource.ResourceManager;
import org.eclipse.scada.vi.model.Image;
import org.eclipse.scada.vi.ui.draw2d.FactoryContext;
import org.eclipse.scada.vi.ui.draw2d.SymbolController;
import org.eclipse.scada.vi.ui.draw2d.loader.SymbolLoader;

public class ImageController extends FigureController {
    private final Label figure;

    private ImageDescriptor currentImage;

    private final SymbolLoader symbolLoader;

    private final FactoryContext factoryContext;

    public ImageController(final FigureCanvas canvas, final SymbolController controller, final Image element,
            final SymbolLoader symbolLoader, final ResourceManager manager, final FactoryContext factoryContext) {
        super(controller, manager);
        this.factoryContext = factoryContext;

        this.symbolLoader = symbolLoader;

        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());
    }

    protected void applyCommon(final Image image) {
        super.applyCommon(image);

        this.figure.setLabelAlignment(Helper.convertAlignment(image.getImageAlignment(), PositionConstants.CENTER));
    }

    @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 {
                final URL url = new URL(this.symbolLoader.resolveUri(uri));
                this.figure.setIcon(this.manager
                        .createImageWithDefault(this.currentImage = ImageDescriptor.createFromURL(url)));
                this.factoryContext.loadedResource(URI.createURI(url.toString()));
            } catch (final MalformedURLException e) {
                this.figure
                        .setIcon(this.manager.createImageWithDefault(ImageDescriptor.getMissingImageDescriptor()));
            }
        }
    }

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