/*******************************************************************************
* Copyright 2011 Google Inc. All Rights Reserved.
*
* 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
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*******************************************************************************/
package com.google.gdt.eclipse.designer.util.ui;
import org.eclipse.wb.internal.core.utils.ui.DrawUtils;
import org.eclipse.swt.events.PaintEvent;
import org.eclipse.swt.events.PaintListener;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.widgets.Canvas;
import org.eclipse.swt.widgets.Composite;
/**
* Canvas for displaying {@link Image}.
*
* @author scheglov_ke
* @coverage gwt.util.ui
*/
public final class ImageCanvas extends Canvas {
////////////////////////////////////////////////////////////////////////////
//
// Constructor
//
////////////////////////////////////////////////////////////////////////////
public ImageCanvas(Composite parent, int style, final Image image) {
super(parent, style);
addPaintListener(new PaintListener() {
public void paintControl(PaintEvent e) {
GC gc = e.gc;
Rectangle clientArea = getClientArea();
// draw image
DrawUtils.drawScaledImage(gc, image, clientArea);
// draw size message
{
String message = image.getBounds().width + "x" + image.getBounds().height;
Point extent = gc.textExtent(message);
int x = (clientArea.width - extent.x) / 2;
int y = clientArea.height - extent.y - 5;
gc.drawText(message, x, y);
}
}
});
}
}