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1 module user.region_shell;// image attached: region.gif
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2 import dwt.DWT;
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3
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4 import dwt.widgets.Display;
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5 import dwt.widgets.Shell;
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6 import dwt.widgets.Button;
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7 import dwt.widgets.Listener;
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8 import dwt.widgets.Event;
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9
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10 import dwt.layout.GridLayout;
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11
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12 import dwt.dwthelper.ByteArrayInputStream;
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13
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14 import dwt.graphics.Image;
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15 import dwt.graphics.ImageData;
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16 import dwt.graphics.Region;
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17 import dwt.graphics.Point;
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18 import dwt.graphics.Rectangle;
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19
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20 import tango.io.Stdout;
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21
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22 class RegionShell: Shell
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23 {
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24 this(Display display, int style, Image image, bool moveable = true)
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25 {
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26 super(display, style);
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27
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28 setShellRegion(image, moveable);
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29 }
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30
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31 this(Display display, Image image, bool moveable = true)
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32 {
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33 this(display, DWT.NO_TRIM, image, moveable);
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34 }
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35
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36 private void setShellRegion(Image image, bool moveable)
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37 {
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38 Region region = new Region();
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39 ImageData imageData = image.getImageData();
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40
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41 if (imageData.alphaData != null)
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42 {
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43 Rectangle pixel = new Rectangle(0, 0, 1, 1);
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44
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45 for (int y = 0; y < imageData.height; y++)
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46 {
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47 for (int x = 0; x < imageData.width; x++)
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48 {
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49 if (imageData.getAlpha(x, y) == 255)
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50 {
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51 pixel.x = imageData.x + x;
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52 pixel.y = imageData.y + y;
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53
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54 region.add(pixel);
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55 }
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56 }
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57 }
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58 }
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59 else
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60 {
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61 ImageData mask = imageData.getTransparencyMask();
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62 Rectangle pixel = new Rectangle(0, 0, 1, 1);
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63 for (int y = 0; y < mask.height; y++)
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64 {
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65 for (int x = 0; x < mask.width; x++)
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66 {
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67 if (mask.getPixel(x, y) != 0)
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68 {
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69 pixel.x = imageData.x + x;
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70 pixel.y = imageData.y + y;
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71
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72 region.add(pixel);
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73 }
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74 }
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75 }
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76 }
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77
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78 this.setRegion(region);
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79 this.setSize(imageData.x + imageData.width, imageData.y + imageData.height);
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80
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81 if (moveable)
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82 {
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83 setMoveable();
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84 }
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85 }
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86
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87 private Shell getCurrent()
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88 {
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89 return this;
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90 }
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91
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92 private void setMoveable()
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93 {
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94 Listener l = new class Listener {
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95 Point origin;
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96
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97 public void handleEvent(Event e) {
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98 switch (e.type) {
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99 case DWT.MouseDown:
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100 origin = new Point(e.x, e.y);
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101 break;
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102 case DWT.MouseUp:
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103 origin = null;
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104 break;
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105 case DWT.MouseMove:
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106 if (origin !is null) {
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107 Point p = display.map(getCurrent(), null, e.x, e.y);
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108 getCurrent.setLocation(p.x - origin.x, p.y - origin.y);
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109 }
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110 break;
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111 }
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112 }
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113 };
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114
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115 this.addListener(DWT.MouseDown, l);
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116 this.addListener(DWT.MouseUp, l);
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117 this.addListener(DWT.MouseMove, l);
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118 }
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119 }
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120
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121 void main()
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122 {
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123 Display display = new Display();
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124 Image image = new Image(display, new ImageData(new ByteArrayInputStream(cast(byte[]) import("region_shell.gif"))));
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125 RegionShell shell = new RegionShell(display, image);
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126
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127 Button closeBtn = new Button(shell, DWT.PUSH);
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128 closeBtn.setText("Close");
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129 closeBtn.addListener(DWT.Selection, new class Listener {
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130 public void handleEvent(Event e) {
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131 shell.close();
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132 }
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133 });
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134
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135 shell.setLayout(new GridLayout());
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136 shell.setBackgroundImage(image);
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137 shell.open();
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138
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139 while (!shell.isDisposed())
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140 {
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141 if (!display.readAndDispatch())
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142 {
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143 display.sleep();
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144 }
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145 }
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146
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147 image.dispose();
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148 display.dispose();
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149 }
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