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/*******************************************************************************
* Copyright (C) 2008, Marek Zawirski <marek.zawirski@gmail.com>
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*******************************************************************************/
package org.eclipse.egit.ui.internal.components;
import org.eclipse.jface.viewers.OwnerDrawLabelProvider;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.TableItem;
/**
* Label provider displaying image centered.
* <p>
* This implementation is actually workaround for lacking SWT/JFace features.
* Code is based on official snippet found on Internet.
*/
// FIXME: doesn't work on Mac OS X 10.5 / Eclipse 3.3
public abstract class CenteredImageLabelProvider extends OwnerDrawLabelProvider {
/**
* @param element
* element to provide label for.
* @return image for provided element.
*/
protected abstract Image getImage(final Object element);
@Override
protected void measure(Event event, Object element) {
// empty
}
@Override
protected void paint(final Event event, final Object element) {
final Image image = getImage(element);
final Rectangle bounds = ((TableItem) event.item)
.getBounds(event.index);
final Rectangle imgBounds = image.getBounds();
bounds.width /= 2;
bounds.width -= imgBounds.width / 2;
bounds.height /= 2;
bounds.height -= imgBounds.height / 2;
final int x = bounds.width > 0 ? bounds.x + bounds.width : bounds.x;
final int y = bounds.height > 0 ? bounds.y + bounds.height : bounds.y;
event.gc.drawImage(image, x, y);
}
}
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