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/*******************************************************************************
* Copyright (c) 2006, 2016 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.SWT;
import org.eclipse.swt.graphics.Device;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Path;
import org.eclipse.swt.graphics.Pattern;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.graphics.Transform;
/**
* Miscellaneous tab that demonstrates emerging colors from layering other
* colors.
*/
public class RGBTab extends AnimatedGraphicsTab {
int translateX, translateY;
float diagTranslateX1, diagTranslateX2, diagTranslateY1, diagTranslateY2;
/**
* Constructor
* @param example A GraphicsExample
*/
public RGBTab(GraphicsExample example) {
super(example);
translateX = translateY = 0;
diagTranslateX1 = diagTranslateX2 = diagTranslateY1 = diagTranslateY2 = 0;
}
@Override
public String getCategory() {
return GraphicsExample.getResourceString("Misc"); //$NON-NLS-1$
}
@Override
public String getText() {
return GraphicsExample.getResourceString("rgb"); //$NON-NLS-1$
}
@Override
public String getDescription() {
return GraphicsExample.getResourceString("rgbDescription"); //$NON-NLS-1$
}
@Override
public void next(int width, int height) {
float h = height;
float w = width;
translateX = (translateX+3)%width;
translateY = (translateY+5)%height;
diagTranslateX1 = (diagTranslateX1+6)%width;
diagTranslateY1 = diagTranslateX1*(h/w);
diagTranslateX2 = (diagTranslateX2+8)%width;
diagTranslateY2 = -diagTranslateX2*(h/w) + h;
}
@Override
public void paint(GC gc, int width, int height) {
if (!example.checkAdvancedGraphics()) return;
Device device = gc.getDevice();
// horizontal rectangle
Transform transform = new Transform(device);
transform.translate(0, translateY);
gc.setTransform(transform);
transform.dispose();
Path path = new Path(device);
path.addRectangle(0, 0, width, 50);
Pattern pattern = new Pattern(device, 0, 0, width, 50,
device.getSystemColor(SWT.COLOR_BLUE), 0x7f,
device.getSystemColor(SWT.COLOR_RED), 0x7f);
gc.setBackgroundPattern(pattern);
gc.fillPath(path);
gc.drawPath(path);
path.dispose();
// vertical rectangle
transform = new Transform(device);
transform.translate(translateX, 0);
gc.setTransform(transform);
transform.dispose();
path = new Path(device);
path.addRectangle(0, 0, 50, height);
pattern.dispose();
pattern = new Pattern(device, 0, 0, 50, height,
device.getSystemColor(SWT.COLOR_DARK_CYAN), 0x7f,
device.getSystemColor(SWT.COLOR_WHITE), 0x7f);
gc.setBackgroundPattern(pattern);
gc.fillPath(path);
gc.drawPath(path);
path.dispose();
// diagonal rectangle from bottom right corner
Rectangle rect = new Rectangle(0, 0, 50, height);
transform = new Transform(device);
transform.translate(width-diagTranslateX1, (height/2)-diagTranslateY1);
// rotate on center of rectangle
transform.translate(rect.width/2, rect.height/2);
transform.rotate(45);
transform.translate(-rect.width/2, -rect.height/2);
gc.setTransform(transform);
transform.dispose();
path = new Path(device);
path.addRectangle(rect.x, rect.y, rect.width, rect.height);
pattern.dispose();
pattern = new Pattern(device, rect.x, rect.y, rect.width, rect.height,
device.getSystemColor(SWT.COLOR_DARK_GREEN), 0x7f,
device.getSystemColor(SWT.COLOR_DARK_MAGENTA), 0x7f);
gc.setBackgroundPattern(pattern);
gc.fillPath(path);
gc.drawPath(path);
path.dispose();
// diagonal rectangle from top right corner
transform = new Transform(device);
transform.translate(width-diagTranslateX2, (height/2)-diagTranslateY2);
// rotate on center of rectangle
transform.translate(rect.width/2, rect.height/2);
transform.rotate(-45);
transform.translate(-rect.width/2, -rect.height/2);
gc.setTransform(transform);
transform.dispose();
path = new Path(device);
path.addRectangle(rect.x, rect.y, rect.width, rect.height);
pattern.dispose();
pattern = new Pattern(device, rect.x, rect.y, rect.width, rect.height,
device.getSystemColor(SWT.COLOR_DARK_RED), 0x7f,
device.getSystemColor(SWT.COLOR_YELLOW), 0x7f);
gc.setBackgroundPattern(pattern);
gc.fillPath(path);
gc.drawPath(path);
pattern.dispose();
path.dispose();
}
}
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