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== Change hue, saturation and brightness of a color ==



<source lang="java">
/*******************************************************************************
* Copyright (c) 2000, 2005 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
*******************************************************************************/
/*
* Change hue, saturation and brightness of a color
*
* For a list of all SWT example snippets see
* http://www.eclipse.org/swt/snippets/
*
* @since 3.2
*/
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.ImageData;
import org.eclipse.swt.graphics.PaletteData;
import org.eclipse.swt.graphics.RGB;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;
public class ColorChangeHueSaturationBrightness {
public static void main(String[] args) {
PaletteData palette = new PaletteData(0xff, 0xff00, 0xff0000);
// ImageData showing variations of hue
ImageData hueData = new ImageData(360, 100, 24, palette);
float hue = 0;
for (int x = 0; x < hueData.width; x++) {
for (int y = 0; y < hueData.height; y++) {
int pixel = palette.getPixel(new RGB(hue, 1f, 1f));
hueData.setPixel(x, y, pixel);
}
hue += 360f / hueData.width;
}
// ImageData showing saturation on x axis and brightness on y axis
ImageData saturationBrightnessData = new ImageData(360, 360, 24, palette);
float saturation = 0f;
float brightness = 1f;
for (int x = 0; x < saturationBrightnessData.width; x++) {
brightness = 1f;
for (int y = 0; y < saturationBrightnessData.height; y++) {
int pixel = palette.getPixel(new RGB(360f, saturation, brightness));
saturationBrightnessData.setPixel(x, y, pixel);
brightness -= 1f / saturationBrightnessData.height;
}
saturation += 1f / saturationBrightnessData.width;
}
Display display = new Display();
Image hueImage = new Image(display, hueData);
Image saturationImage = new Image(display, saturationBrightnessData);
Shell shell = new Shell(display);
shell.setText("Hue, Saturation, Brightness");
GridLayout gridLayout = new GridLayout(2, false);
gridLayout.verticalSpacing = 10;
gridLayout.marginWidth = gridLayout.marginHeight = 16;
shell.setLayout(gridLayout);
Label label = new Label(shell, SWT.CENTER);
label.setImage(hueImage);
GridData data = new GridData(SWT.RIGHT, SWT.CENTER, false, false, 2, 1);
label.setLayoutData(data);
label = new Label(shell, SWT.CENTER); // spacer
label = new Label(shell, SWT.CENTER);
label.setText("Hue");
data = new GridData(SWT.CENTER, SWT.CENTER, false, false);
label.setLayoutData(data);
label = new Label(shell, SWT.CENTER); // spacer
data = new GridData(SWT.CENTER, SWT.CENTER, false, false, 2, 1);
label.setLayoutData(data);
label = new Label(shell, SWT.LEFT);
label.setText("Brightness");
data = new GridData(SWT.LEFT, SWT.CENTER, false, false);
label.setLayoutData(data);
label = new Label(shell, SWT.CENTER);
label.setImage(saturationImage);
data = new GridData(SWT.CENTER, SWT.CENTER, false, false);
label.setLayoutData(data);
label = new Label(shell, SWT.CENTER); // spacer
label = new Label(shell, SWT.CENTER);
label.setText("Saturation");
data = new GridData(SWT.CENTER, SWT.CENTER, false, false);
label.setLayoutData(data);
shell.pack();
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
hueImage.dispose();
saturationImage.dispose();
display.dispose();
}
}</source>



== Create Transparent Color ==



<source lang="java">
/*******************************************************************************
* Copyright (c) 2000, 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
*******************************************************************************/
/*
*
* For a list of all SWT example snippets see
* http://www.eclipse.org/swt/snippets/
*/
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.PaintEvent;
import org.eclipse.swt.events.PaintListener;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.ImageData;
import org.eclipse.swt.graphics.PaletteData;
import org.eclipse.swt.graphics.RGB;
import org.eclipse.swt.widgets.Canvas;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
public class ColorTransparentCreate {
public static void main(String[] args) {
final Display display = new Display();
Shell shell = new Shell(display);
shell.setBounds(10, 10, 200, 200);
// create a cursor with a transparent image
Color white = display.getSystemColor(SWT.COLOR_WHITE);
Color black = display.getSystemColor(SWT.COLOR_BLACK);
PaletteData palette = new PaletteData(new RGB[] { white.getRGB(), black.getRGB() });
final ImageData sourceData = new ImageData(30, 30, 1, palette);
sourceData.transparentPixel = 0;
Canvas canvas = new Canvas(shell, SWT.BORDER);
canvas.setBounds(10, 50, 150, 100);

canvas.addPaintListener(new PaintListener() {
public void paintControl(PaintEvent e) {
e.gc.drawString("hide Cursor here", 10, 10);
e.gc.drawImage(new Image(display, sourceData), 0, 0);
}
});
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
display.dispose();
}
}</source>

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в 17:44, 31 мая 2010

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