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/*******************************************************************************
* Copyright (c) 2006 IBM Corporation 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:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.swt.examples.graphics;
import org.eclipse.swt.*;
import org.eclipse.swt.graphics.*;
/**
* This tab demonstrates how an image can be flipped in various fashions.
*/
public class ImageFlipTab extends GraphicsTab {
public ImageFlipTab(GraphicsExample example) {
super(example);
}
public String getCategory() {
return GraphicsExample.getResourceString("Image"); //$NON-NLS-1$
}
public String getText() {
return GraphicsExample.getResourceString("Flip"); //$NON-NLS-1$
}
public String getDescription() {
return GraphicsExample.getResourceString("FlipDescription"); //$NON-NLS-1$
}
public void paint(GC gc, int width, int height) {
if (!example.checkAdvancedGraphics()) return;
Device device = gc.getDevice();
Image image = GraphicsExample.loadImage(device, GraphicsExample.class, "houses.png");
Rectangle bounds = image.getBounds();
// top
Transform transform = new Transform(device);
transform.translate((width-bounds.width)/2, (height-bounds.height)/2);
transform.scale(1, -1);
gc.setTransform(transform);
// draw the original image
gc.drawImage(image, 0, 0);
transform.dispose();
// bottom
transform = new Transform(device);
transform.translate((width-bounds.width)/2, 2*bounds.height + (height-bounds.height)/2);
transform.scale(1, -1);
gc.setTransform(transform);
// draw the original image
gc.drawImage(image, 0, 0);
transform.dispose();
// left
transform = new Transform(device);
transform.translate((width-bounds.width)/2, (height-bounds.height)/2);
transform.scale(-1, 1);
gc.setTransform(transform);
// draw the original image
gc.drawImage(image, 0, 0);
transform.dispose();
// right
transform = new Transform(device);
transform.translate(2*bounds.width + (width-bounds.width)/2, (height-bounds.height)/2);
transform.scale(-1, 1);
gc.setTransform(transform);
// draw the original image
gc.drawImage(image, 0, 0);
transform.dispose();
gc.setTransform(null);
gc.drawImage(image, (width-bounds.width)/2, (height-bounds.height)/2);
image.dispose();
}
/**
* Returns the name of a valid font for the host platform.
*/
static String getPlatformFont() {
if(SWT.getPlatform() == "win32") {
return "Arial";
} else if (SWT.getPlatform() == "motif") {
return "Helvetica";
} else if (SWT.getPlatform() == "gtk") {
return "Baekmuk Batang";
} else if (SWT.getPlatform() == "carbon") {
return "Arial";
} else { // photon, etc ...
return "Verdana";
}
}
}
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