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annotate dwtx/novocode/ScaledImage.d @ 190:df4e66472aff

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novocode line endings, indention
author Frank Benoit <benoit@tionex.de>
date Sun, 26 Oct 2008 15:04:41 +0100
parents e3780acbbf80
children
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1 /*******************************************************************************
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2 * Copyright (c) 2004 Stefan Zeiger 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.novocode.com/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * Stefan Zeiger (szeiger@novocode.com) - initial API and implementation
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10 * IBM Corporation - original SWT CLabel implementation on which this class is based
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11 *******************************************************************************/
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12
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13 module dwtx.novocode.ScaledImage;
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14
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15 import dwt.DWT;
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16 import dwt.graphics.Color;
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17 import dwt.graphics.GC;
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18 import dwt.graphics.Image;
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19 import dwt.graphics.Point;
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20 import dwt.graphics.Rectangle;
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21 import dwt.widgets.Canvas;
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22 import dwt.widgets.Composite;
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23 import dwt.widgets.Event;
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24 import dwt.widgets.Listener;
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25
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26
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27 /**
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28 * An image / gradient component. Under development.
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29 *
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30 * @author Stefan Zeiger (szeiger@novocode.com)
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31 * @since Mar 21, 2005
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32 * @version $Id: ScaledImage.java 346 2005-07-11 20:15:57 +0000 (Mon, 11 Jul 2005) szeiger $
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33 */
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34
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35 class ScaledImage : Canvas
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36 {
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37 private const Rectangle DEFAULT_BOUNDS;
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38
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39 public static const int IMAGE_PLACEMENT_STRETCH = 0;
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40 public static const int IMAGE_PLACEMENT_TILE = 1;
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41
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42 private Image image;
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43
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44 private Color[] gradientColors;
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45
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46 private int[] gradientPercents;
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47
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48 private bool gradientVertical;
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49
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50 private int imagePlacement = IMAGE_PLACEMENT_STRETCH;
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51
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52
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53 this(Composite parent, int style)
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54 {
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55 super(parent, style | DWT.NO_BACKGROUND);
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56 this.DEFAULT_BOUNDS = new Rectangle(0, 0, 32, 32);
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57
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58 addListener(DWT.Paint, dgListener(&onPaint));
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59 }
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60
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61
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62 private void onPaint(Event event)
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63 {
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64 Rectangle rect = getClientArea();
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65 GC gc = event.gc;
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66 if(image is null
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67 || image.getImageData().getTransparencyType() !is DWT.TRANSPARENCY_NONE)
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68 {
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69
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70 if(gradientColors !is null)
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71 {
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72 // draw a gradient behind the text
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73 Color oldBackground = gc.getBackground();
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74 if(gradientColors.length is 1)
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75 {
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76 if(gradientColors[0] !is null) gc.setBackground(gradientColors[0]);
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77 gc.fillRectangle(0, 0, rect.width, rect.height);
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78 }
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79 else
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80 {
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81 Color oldForeground = gc.getForeground();
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82 Color lastColor = gradientColors[0];
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83 if(lastColor is null) lastColor = oldBackground;
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84 int pos = 0;
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85 for(int i = 0; i < gradientPercents.length; ++i)
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86 {
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87 gc.setForeground(lastColor);
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88 lastColor = gradientColors[i + 1];
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89 if(lastColor is null) lastColor = oldBackground;
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90 gc.setBackground(lastColor);
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91 if(gradientVertical)
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92 {
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93 int gradientHeight = (gradientPercents[i] * rect.height / 100)
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94 - pos;
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95 gc.fillGradientRectangle(0, pos, rect.width, gradientHeight,
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96 true);
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97 pos += gradientHeight;
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98 }
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99 else
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100 {
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101 int gradientWidth = (gradientPercents[i] * rect.width / 100)
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102 - pos;
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103 gc.fillGradientRectangle(pos, 0, gradientWidth, rect.height,
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104 false);
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105 pos += gradientWidth;
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106 }
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107 }
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108 if(gradientVertical && pos < rect.height)
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109 {
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110 gc.setBackground(getBackground());
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111 gc.fillRectangle(0, pos, rect.width, rect.height - pos);
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112 }
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113 if(!gradientVertical && pos < rect.width)
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114 {
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115 gc.setBackground(getBackground());
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116 gc.fillRectangle(pos, 0, rect.width - pos, rect.height);
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117 }
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118 gc.setForeground(oldForeground);
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119 }
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120 gc.setBackground(oldBackground);
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121 }
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122 else
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123 {
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124 if((getStyle() & DWT.NO_BACKGROUND) !is 0)
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125 {
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126 gc.setBackground(getBackground());
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127 gc.fillRectangle(rect);
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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 if(image !is null)
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133 {
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134 Rectangle ib = image.getBounds();
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135 if(imagePlacement is IMAGE_PLACEMENT_TILE)
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136 {
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137 int maxStartX = rect.x + rect.width;
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138 int maxStartY = rect.y + rect.height;
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139 for(int x = rect.x; x < maxStartX; x += ib.width)
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140 for(int y = rect.y; y < maxStartY; y += ib.height)
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141 event.gc.drawImage(image, x, y);
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142 }
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143 else // IMAGE_PLACEMENT_STRETCH
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144 {
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145 event.gc.drawImage(image, ib.x, ib.y, ib.width, ib.height, rect.x,
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146 rect.y, rect.width, rect.height);
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147 }
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148 }
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149 }
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150
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151
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152 public void setImage(Image image)
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153 {
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154 this.image = image;
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155 redraw();
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156 }
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157
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158
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159 public void setImagePlacement(int imagePlacement)
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160 {
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161 this.imagePlacement = imagePlacement;
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162 redraw();
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163 }
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164
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165
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166 public Point computeSize(int wHint, int hHint, bool changed)
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167 {
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168 checkWidget();
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169 Rectangle ib = image !is null ? image.getBounds() : DEFAULT_BOUNDS;
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170 if(wHint == DWT.DEFAULT) wHint = ib.width;
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171 if(hHint == DWT.DEFAULT) hHint = ib.height;
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172 return new Point(wHint, hHint);
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173 }
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174
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175
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176 public void setBackground(Color color)
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177 {
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178 super.setBackground(color);
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179 // Are these settings the same as before?
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180 if(color !is null && gradientColors is null && gradientPercents is null)
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181 {
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182 Color background = getBackground();
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183 if(color is background)
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184 {
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185 return;
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186 }
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187 }
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188 gradientColors = null;
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189 gradientPercents = null;
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190 redraw();
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191 }
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192
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193
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194 public void setBackground(Color[] colors, int[] percents)
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195 {
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196 setBackground(colors, percents, false);
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197 }
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198
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199
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200 public void setBackground(Color[] colors, int[] percents, bool vertical)
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201 {
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202 checkWidget();
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203 if(colors !is null)
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204 {
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205 if(percents is null || percents.length !is colors.length - 1)
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206 {
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207 DWT.error(DWT.ERROR_INVALID_ARGUMENT);
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208 }
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209 if(getDisplay().getDepth() < 15)
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210 {
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211 // Don't use gradients on low color displays
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212 colors = [ colors[colors.length - 1] ];
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213 percents = [];
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214 }
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215 for(int i = 0; i < percents.length; i++)
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216 {
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217 if(percents[i] < 0 || percents[i] > 100)
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218 {
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219 DWT.error(DWT.ERROR_INVALID_ARGUMENT);
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220 }
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221 if(i > 0 && percents[i] < percents[i - 1])
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222 {
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223 DWT.error(DWT.ERROR_INVALID_ARGUMENT);
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224 }
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225 }
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226 }
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227
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228 // Are these settings the same as before?
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229 Color background = getBackground();
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230 if((gradientColors !is null) && (colors !is null)
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231 && (gradientColors.length is colors.length))
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232 {
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233 bool same = false;
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234 for(int i = 0; i < gradientColors.length; i++)
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235 {
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236 same = (gradientColors[i] is colors[i])
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237 || ((gradientColors[i] is null) && (colors[i] is background))
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238 || ((gradientColors[i] is background) && (colors[i] is null));
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239 if(!same) break;
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240 }
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diff changeset
241 if(same)
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242 {
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parents: 188
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243 for(int i = 0; i < gradientPercents.length; i++)
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244 {
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245 same = gradientPercents[i] is percents[i];
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246 if(!same) break;
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247 }
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248 }
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249 if(same && this.gradientVertical is vertical) return;
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250 }
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parents: 188
diff changeset
251 // Store the new settings
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parents: 188
diff changeset
252 if(colors is null)
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diff changeset
253 {
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parents: 188
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254 gradientColors = null;
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parents: 188
diff changeset
255 gradientPercents = null;
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parents: 188
diff changeset
256 gradientVertical = false;
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parents: 188
diff changeset
257 }
df4e66472aff novocode line endings, indention
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parents: 188
diff changeset
258 else
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diff changeset
259 {
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diff changeset
260 gradientColors = new Color[colors.length];
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parents: 188
diff changeset
261 for(int i = 0; i < colors.length; ++i)
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parents: 188
diff changeset
262 gradientColors[i] = (colors[i] !is null) ? colors[i] : background;
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parents: 188
diff changeset
263 gradientPercents = new int[percents.length];
df4e66472aff novocode line endings, indention
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parents: 188
diff changeset
264 for(int i = 0; i < percents.length; ++i)
df4e66472aff novocode line endings, indention
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parents: 188
diff changeset
265 gradientPercents[i] = percents[i];
df4e66472aff novocode line endings, indention
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parents: 188
diff changeset
266 gradientVertical = vertical;
df4e66472aff novocode line endings, indention
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parents: 188
diff changeset
267 }
df4e66472aff novocode line endings, indention
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parents: 188
diff changeset
268 // Refresh with the new settings
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parents: 188
diff changeset
269 redraw();
df4e66472aff novocode line endings, indention
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parents: 188
diff changeset
270 }
df4e66472aff novocode line endings, indention
Frank Benoit <benoit@tionex.de>
parents: 188
diff changeset
271 }