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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 * Port to the D programming language:
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11 * Bill Baxter <bill@billbaxter.com>
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12 *******************************************************************************/
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13 module org.eclipse.swt.snippets.Snippet207;
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14
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15 /*
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16 * Use transformation matrices to reflect, rotate and shear images
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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 import org.eclipse.swt.SWT;
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22 import org.eclipse.swt.events.PaintEvent;
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23 import org.eclipse.swt.events.PaintListener;
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24 import org.eclipse.swt.graphics.GC;
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25 import org.eclipse.swt.graphics.Transform;
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26 import org.eclipse.swt.graphics.Font;
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27 import org.eclipse.swt.graphics.Rectangle;
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28 import org.eclipse.swt.graphics.Image;
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29 import org.eclipse.swt.layout.FillLayout;
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30 import org.eclipse.swt.widgets.Display;
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31 import org.eclipse.swt.widgets.Shell;
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32 import org.eclipse.swt.widgets.Canvas;
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33
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112
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34 version(Tango){
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35 import Math=tango.math.Math;
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36 } else { // Phobos
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37 import Math=std.math;
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38 }
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28
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39
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40 void main() {
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41 Display display = new Display();
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42
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43 Image image = new Image(display, 110, 60);
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44 GC gc = new GC(image);
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45 Font font = new Font(display, "Times", 30., SWT.BOLD);
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46 gc.setFont(font);
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47 gc.setBackground(display.getSystemColor(SWT.COLOR_RED));
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48 gc.fillRectangle(0, 0, 110, 60);
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49 gc.setForeground(display.getSystemColor(SWT.COLOR_WHITE));
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50 gc.drawText("SWT", 10, 10, true);
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51 font.dispose();
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52 gc.dispose();
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53
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54 Rectangle rect = image.getBounds();
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55 Shell shell = new Shell(display);
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56 shell.setText("Matrix Tranformations");
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57 shell.setLayout(new FillLayout());
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58 Canvas canvas = new Canvas(shell, SWT.DOUBLE_BUFFERED);
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59 canvas.addPaintListener(new class() PaintListener {
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60 public void paintControl(PaintEvent e) {
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61 GC gc = e.gc;
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62 gc.setAdvanced(true);
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63 if (!gc.getAdvanced()){
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64 gc.drawText("Advanced graphics not supported", 30, 30, true);
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65 return;
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66 }
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67
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68 // Original image
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69 int x = 30, y = 30;
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70 gc.drawImage(image, x, y);
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71 x += rect.width + 30;
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72
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73 Transform transform = new Transform(display);
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74
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75 // Note that the tranform is applied to the whole GC therefore
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76 // the coordinates need to be adjusted too.
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77
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78 // Reflect around the y axis.
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79 transform.setElements(-1, 0, 0, 1, 0 ,0);
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80 gc.setTransform(transform);
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81 gc.drawImage(image, -1*x-rect.width, y);
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82
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83 x = 30; y += rect.height + 30;
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84
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85 // Reflect around the x axis.
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86 transform.setElements(1, 0, 0, -1, 0, 0);
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87 gc.setTransform(transform);
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88 gc.drawImage(image, x, -1*y-rect.height);
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89
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90 x += rect.width + 30;
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91
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92 // Reflect around the x and y axes
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93 transform.setElements(-1, 0, 0, -1, 0, 0);
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94 gc.setTransform(transform);
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95 gc.drawImage(image, -1*x-rect.width, -1*y-rect.height);
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96
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97 x = 30; y += rect.height + 30;
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98
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99 // Shear in the x-direction
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100 transform.setElements(1, 0, -1, 1, 0, 0);
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101 gc.setTransform(transform);
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102 gc.drawImage(image, 300, y);
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103
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104 // Shear in y-direction
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105 transform.setElements(1, -1, 0, 1, 0, 0);
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106 gc.setTransform(transform);
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107 gc.drawImage(image, 150, 475);
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108
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109 // Rotate by 45 degrees
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110 float cos45 = Math.cos(45);
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111 float sin45 = Math.sin(45);
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112 transform.setElements(cos45, sin45, -sin45, cos45, 0, 0);
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113 gc.setTransform(transform);
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114 gc.drawImage(image, 350, 100);
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115
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116 transform.dispose();
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117 }
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118 });
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119
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120 shell.setSize(350, 550);
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121 shell.open();
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122 while (!shell.isDisposed()) {
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123 if (!display.readAndDispatch())
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124 display.sleep();
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125 }
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126 image.dispose();
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127 display.dispose();
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128 }
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129
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130
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131
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132
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133
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