org.eclipse.sapphire.ui.ProblemOverlayImageDescriptor.java Source code

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Here is the source code for org.eclipse.sapphire.ui.ProblemOverlayImageDescriptor.java

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/******************************************************************************
 * Copyright (c) 2015 Oracle
 * 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:
 *    Konstantin Komissarchik - initial implementation and ongoing maintenance
 ******************************************************************************/

package org.eclipse.sapphire.ui;

import org.eclipse.jface.resource.CompositeImageDescriptor;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.sapphire.modeling.Status;
import org.eclipse.sapphire.ui.forms.swt.SwtResourceCache;
import org.eclipse.sapphire.ui.forms.swt.SwtUtil;
import org.eclipse.swt.graphics.ImageData;
import org.eclipse.swt.graphics.Point;

/**
 * @author <a href="mailto:konstantin.komissarchik@oracle.com">Konstantin Komissarchik</a>
 */

public final class ProblemOverlayImageDescriptor extends CompositeImageDescriptor {
    private static final ImageData IMG_ERROR_OVERLAY = SwtUtil.createImageData(SwtResourceCache.class,
            "ErrorOverlay.gif");

    private static final ImageData IMG_WARNING_OVERLAY = SwtUtil.createImageData(SwtResourceCache.class,
            "WarningOverlay.png");

    private final ImageData base;
    private final ImageData overlay;
    private final Point size;

    public ProblemOverlayImageDescriptor(final ImageDescriptor base, final Status.Severity severity) {
        this.base = base.getImageData();
        this.overlay = getOverlay(severity);
        this.size = new Point(this.base.width, this.base.height);
    }

    protected void drawCompositeImage(final int width, final int height) {
        drawImage(this.base, 0, 0);
        drawImage(this.overlay, 0, height - this.overlay.height);
    }

    protected Point getSize() {
        return this.size;
    }

    private ImageData getOverlay(final Status.Severity severity) {
        if (severity == Status.Severity.ERROR) {
            return IMG_ERROR_OVERLAY;
        } else if (severity == Status.Severity.WARNING) {
            return IMG_WARNING_OVERLAY;
        } else {
            throw new IllegalArgumentException();
        }
    }
}