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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2005 IBM Corporation and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * IBM Corporation - initial API and implementation
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10 * D Port:
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11 * Thomas Demmer <t_demmer AT web DOT de>
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12 *******************************************************************************/
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13 module color.Snippet208;
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14
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15 /*
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16 * Change hue, saturation and brightness of a color
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17 *
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18 * For a list of all SWT example snippets see
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19 * http://www.eclipse.org/swt/snippets/
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20 *
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21 * @since 3.2
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22 */
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23 import dwt.DWT;
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24 import dwt.graphics.Image;
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25 import dwt.graphics.ImageData;
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26 import dwt.graphics.RGB;
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27 import dwt.graphics.PaletteData;
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28 import dwt.layout.GridData;
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29 import dwt.layout.GridLayout;
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30 import dwt.widgets.Display;
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31 import dwt.widgets.Label;
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32 import dwt.widgets.Shell;
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33
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34 import dwt.dwthelper.utils;
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35
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36 void main (String [] args) {
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37 PaletteData palette = new PaletteData(0xff, 0xff00, 0xff0000);
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38
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39 // ImageData showing variations of hue
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40 ImageData hueData = new ImageData(360, 100, 24, palette);
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41 float hue = 0;
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42 for (int x = 0; x < hueData.width; x++) {
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43 for (int y = 0; y < hueData.height; y++) {
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44 int pixel = palette.getPixel(new RGB(hue, 1f, 1f));
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45 hueData.setPixel(x, y, pixel);
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46 }
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47 hue += 360f / hueData.width;
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48 }
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49
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50 // ImageData showing saturation on x axis and brightness on y axis
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51 ImageData saturationBrightnessData = new ImageData(360, 360, 24, palette);
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52 float saturation = 0f;
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53 float brightness = 1f;
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54 for (int x = 0; x < saturationBrightnessData.width; x++) {
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55 brightness = 1f;
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56 for (int y = 0; y < saturationBrightnessData.height; y++) {
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57 int pixel = palette.getPixel(new RGB(360f, saturation, brightness));
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58 saturationBrightnessData.setPixel(x, y, pixel);
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59 brightness -= 1f / saturationBrightnessData.height;
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60 }
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61 saturation += 1f / saturationBrightnessData.width;
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62 }
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63
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64 Display display = new Display();
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65 Image hueImage = new Image(display, hueData);
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66 Image saturationImage = new Image(display, saturationBrightnessData);
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67 Shell shell = new Shell(display);
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68 shell.setText("Hue, Saturation, Brightness");
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69 GridLayout gridLayout = new GridLayout(2, false);
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70 gridLayout.verticalSpacing = 10;
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71 gridLayout.marginWidth = gridLayout.marginHeight = 16;
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72 shell.setLayout(gridLayout);
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73
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74 Label label = new Label(shell, DWT.CENTER);
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75 label.setImage(hueImage);
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76 GridData data = new GridData(DWT.RIGHT, DWT.CENTER, false, false, 2, 1);
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77 label.setLayoutData(data);
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78
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79 label = new Label(shell, DWT.CENTER); //spacer
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80 label = new Label(shell, DWT.CENTER);
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81 label.setText("Hue");
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82 data = new GridData(DWT.CENTER, DWT.CENTER, false, false);
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83 label.setLayoutData(data);
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84 label = new Label(shell, DWT.CENTER); //spacer
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85 data = new GridData(DWT.CENTER, DWT.CENTER, false, false, 2, 1);
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86 label.setLayoutData(data);
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87
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88 label = new Label(shell, DWT.LEFT);
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89 label.setText("Brightness");
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90 data = new GridData(DWT.LEFT, DWT.CENTER, false, false);
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91 label.setLayoutData(data);
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92
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93 label = new Label(shell, DWT.CENTER);
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94 label.setImage(saturationImage);
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95 data = new GridData(DWT.CENTER, DWT.CENTER, false, false);
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96 label.setLayoutData (data);
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97
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98 label = new Label(shell, DWT.CENTER); //spacer
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99 label = new Label(shell, DWT.CENTER);
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100 label.setText("Saturation");
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101 data = new GridData(DWT.CENTER, DWT.CENTER, false, false);
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102 label.setLayoutData(data);
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103
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104 shell.pack();
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105 shell.open();
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106 while (!shell.isDisposed()) {
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107 if (!display.readAndDispatch()) {
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108 display.sleep();
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109 }
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110 }
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111 hueImage.dispose();
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112 saturationImage.dispose();
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113 display.dispose();
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114 }
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