Mercurial > projects > dwt2
annotate org.eclipse.draw2d/src/org/eclipse/draw2d/ButtonBorder.d @ 12:bc29606a740c
Added dwt-addons in original directory structure of eclipse.org
author | Frank Benoit <benoit@tionex.de> |
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date | Sat, 14 Mar 2009 18:23:29 +0100 |
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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 * Frank Benoit <benoit@tionex.de> |
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12 *******************************************************************************/ |
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13 module org.eclipse.draw2d.ButtonBorder; |
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14 |
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15 import java.lang.all; |
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16 |
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17 |
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18 |
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19 import org.eclipse.swt.graphics.Color; |
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20 import org.eclipse.draw2d.geometry.Insets; |
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21 import org.eclipse.draw2d.SchemeBorder; |
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22 import org.eclipse.draw2d.Border; |
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23 import org.eclipse.draw2d.IFigure; |
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24 import org.eclipse.draw2d.Graphics; |
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25 import org.eclipse.draw2d.Clickable; |
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26 import org.eclipse.draw2d.ButtonModel; |
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27 import org.eclipse.draw2d.ColorConstants; |
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28 |
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29 /** |
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30 * Creates a border for a clickable type of figure, which works in conjunction with the |
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31 * Figure and its model. This border adjusts itself to the various states the model of the |
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32 * figure could be. This border uses an extended {@link SchemeBorder.Scheme Scheme} |
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33 * called {@link ButtonScheme} which provides more information required by border to |
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34 * handle the the states of the model. |
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35 * |
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36 * @see Scheme |
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37 * @see ButtonScheme |
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38 */ |
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39 public class ButtonBorder |
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40 : SchemeBorder |
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41 { |
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42 alias SchemeBorder.paint paint; |
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43 /** |
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44 * Default button border. |
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45 * @see SCHEMES#BUTTON |
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46 */ |
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47 private static Border BUTTON_; |
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48 public static Border BUTTON(){ |
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49 if( BUTTON_ is null ){ |
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50 synchronized( ButtonScheme.classinfo ){ |
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51 if( BUTTON_ is null ){ |
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52 BUTTON_ = new ButtonBorder(SCHEMES.BUTTON); |
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53 } |
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54 } |
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55 } |
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56 return BUTTON_; |
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57 } |
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58 /** |
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59 * Inverted hightlight colors from BUTTON. |
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60 * @see SCHEMES#BUTTON_CONTRAST |
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61 */ |
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62 private static Border BUTTON_CONTRAST_; |
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63 public static Border BUTTON_CONTRAST(){ |
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64 if( BUTTON_CONTRAST_ is null ){ |
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65 synchronized( ButtonScheme.classinfo ){ |
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66 if( BUTTON_CONTRAST_ is null ){ |
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67 BUTTON_CONTRAST_ = new ButtonBorder(SCHEMES.BUTTON_CONTRAST); |
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68 } |
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69 } |
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70 } |
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71 return BUTTON_CONTRAST_; |
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72 } |
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73 /** |
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74 * Used for scrollbar buttons. |
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75 * @see SCHEMES#BUTTON_SCROLLBAR |
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76 */ |
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77 private static Border BUTTON_SCROLLBAR_; |
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78 public static Border BUTTON_SCROLLBAR(){ |
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79 if( BUTTON_SCROLLBAR_ is null ){ |
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80 synchronized( ButtonScheme.classinfo ){ |
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81 if( BUTTON_SCROLLBAR_ is null ){ |
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82 BUTTON_SCROLLBAR_ = new ButtonBorder(SCHEMES.BUTTON_SCROLLBAR); |
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83 } |
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84 } |
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85 } |
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86 return BUTTON_SCROLLBAR_; |
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87 } |
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88 /** |
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89 * Used for toolbar buttons. |
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90 * @see SCHEMES#TOOLBAR |
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91 */ |
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92 private static Border TOOLBAR_; |
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93 public static Border TOOLBAR(){ |
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94 if( TOOLBAR_ is null ){ |
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95 synchronized( ButtonScheme.classinfo ){ |
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96 if( TOOLBAR_ is null ){ |
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97 TOOLBAR_ = new ButtonBorder(SCHEMES.TOOLBAR); |
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98 } |
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99 } |
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100 } |
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101 return TOOLBAR_; |
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102 } |
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103 |
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104 /** |
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105 * Provides for a scheme to represent the borders of clickable figures like buttons. |
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106 * Though similar to the {@link SchemeBorder.Scheme Scheme} it supports an extra set of |
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107 * borders for the pressed states. |
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108 */ |
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109 public static class ButtonScheme |
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110 : Scheme |
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111 { |
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112 private Color[] |
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113 highlightPressed = null, |
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114 shadowPressed = null; |
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115 |
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116 /** |
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117 * Constructs a new button scheme where the input colors are the colors for the |
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118 * top-left and bottom-right sides of the border. These colors serve as the colors |
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119 * when the border is in a pressed state too. The width of each side is determined by |
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120 * the number of colors passed in as input. |
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121 * |
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122 * @param highlight Colors for the top-left sides of the border |
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123 * @param shadow Colors for the bottom-right sides of the border |
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124 * @since 2.0 |
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125 */ |
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126 public this(Color[] highlight, Color[] shadow) { |
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127 highlightPressed = this.highlight = highlight; |
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128 shadowPressed = this.shadow = shadow; |
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129 init(); |
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130 } |
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131 |
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132 /** |
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133 * Constructs a new button scheme where the input colors are the colors for the |
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134 * top-left and bottom-right sides of the border, for the normal and pressed states. |
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135 * The width of each side is determined by the number of colors passed in as input. |
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136 * |
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137 * @param hl Colors for the top-left sides of the border |
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138 * @param sh Colors for the bottom-right sides of the border |
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139 * @param hlp Colors for the top-left sides of the border when figure is pressed |
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140 * @param shp Colors for the bottom-right sides of the border when figure is pressed |
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141 * @since 2.0 |
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142 */ |
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143 public this(Color[] hl, Color[] sh, Color[] hlp, Color[] shp) { |
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144 highlight = hl; |
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145 shadow = sh; |
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146 highlightPressed = hlp; |
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147 shadowPressed = shp; |
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148 init(); |
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149 } |
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150 |
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151 /** |
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152 * Calculates and returns the Insets for this border. The calculations are based on |
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153 * the number of normal and pressed, highlight and shadow colors. |
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154 * |
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155 * @return The insets for this border |
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156 * @since 2.0 |
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157 */ |
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158 protected Insets calculateInsets() { |
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159 int br = 1 + Math.max(getShadow().length, getHighlightPressed().length); |
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160 int tl = Math.max(getHighlight().length, getShadowPressed().length); |
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161 return new Insets(tl, tl, br, br); |
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162 } |
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163 |
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164 /** |
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165 * Calculates and returns the opaque state of this border. |
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166 * <p> |
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167 * Returns false in the following conditions: |
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168 * <ul> |
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169 * <li> The number of highlight colors is different than the the number of |
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170 * shadow colors. |
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171 * <li> The number of pressed highlight colors is different than the number of |
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172 * pressed shadow colors. |
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173 * <li> Any of the highlight and shadow colors are set to <code>null</code> |
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174 * <li> Any of the pressed highlight and shadow colors are set to |
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175 * <code>null</code> |
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176 * </ul> |
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177 * This is done so that the entire region under the figure is properly covered. |
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178 * |
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179 * @return The opaque state of this border |
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180 * @since 2.0 |
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181 */ |
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182 protected bool calculateOpaque() { |
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183 if (!super.calculateOpaque()) |
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184 return false; |
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185 if (getHighlight().length !is getShadowPressed().length) |
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186 return false; |
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187 if (getShadow().length !is getHighlightPressed().length) |
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188 return false; |
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189 Color [] colors = getHighlightPressed(); |
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190 for (int i = 0; i < colors.length; i++) |
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191 if (colors[i] is null) |
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192 return false; |
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193 colors = getShadowPressed(); |
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194 for (int i = 0; i < colors.length; i++) |
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195 if (colors[i] is null) |
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196 return false; |
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197 return true; |
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198 } |
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199 |
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200 /** |
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201 * Returns the pressed highlight colors of this border. |
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202 * |
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203 * @return Colors as an array of Colors |
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204 * @since 2.0 |
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205 */ |
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206 protected Color[] getHighlightPressed() { |
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207 return highlightPressed; |
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208 } |
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209 |
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210 /** |
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211 * Returns the pressed shadow colors of this border. |
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212 * |
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213 * @return Colors as an array of Colors |
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214 * @since 2.0 |
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215 */ |
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216 protected Color[] getShadowPressed() { |
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217 return shadowPressed; |
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218 } |
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219 } |
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220 |
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221 /** |
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222 * Interface defining commonly used schemes for the ButtonBorder. |
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223 */ |
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224 public struct SCHEMES { |
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225 |
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226 /** |
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227 * Contrast button scheme |
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228 */ |
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229 private static ButtonScheme BUTTON_CONTRAST_; |
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230 static ButtonScheme BUTTON_CONTRAST(){ |
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231 if( BUTTON_CONTRAST_ is null ){ |
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232 synchronized( ButtonScheme.classinfo ){ |
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233 if( BUTTON_CONTRAST_ is null ){ |
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234 BUTTON_CONTRAST_ = new ButtonScheme( |
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235 [ColorConstants.button, ColorConstants.buttonLightest], |
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236 DARKEST_DARKER |
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237 ); |
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238 } |
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239 } |
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240 } |
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241 return BUTTON_CONTRAST_; |
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242 } |
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243 /** |
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244 * Regular button scheme |
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245 */ |
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246 private static ButtonScheme BUTTON_; |
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247 static ButtonScheme BUTTON(){ |
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248 if( BUTTON_ is null ){ |
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249 synchronized( ButtonScheme.classinfo ){ |
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250 if( BUTTON_ is null ){ |
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251 BUTTON_ = new ButtonScheme( |
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252 [ColorConstants.buttonLightest], |
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253 DARKEST_DARKER |
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254 ); |
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255 } |
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256 } |
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257 } |
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258 return BUTTON_; |
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259 } |
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260 /** |
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261 * Toolbar button scheme |
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262 */ |
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263 private static ButtonScheme TOOLBAR_; |
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264 static ButtonScheme TOOLBAR(){ |
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265 if( TOOLBAR_ is null ){ |
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266 synchronized( ButtonScheme.classinfo ){ |
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267 if( TOOLBAR_ is null ){ |
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268 TOOLBAR_ = new ButtonScheme( |
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269 [ColorConstants.buttonLightest], |
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270 [ColorConstants.buttonDarker] |
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271 ); |
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272 } |
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273 } |
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274 } |
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275 return TOOLBAR_; |
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276 } |
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277 /** |
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278 * Scrollbar button scheme |
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279 */ |
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280 private static ButtonScheme BUTTON_SCROLLBAR_; |
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281 static ButtonScheme BUTTON_SCROLLBAR(){ |
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282 if( BUTTON_SCROLLBAR_ is null ){ |
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283 synchronized( ButtonScheme.classinfo ){ |
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284 if( BUTTON_SCROLLBAR_ is null ){ |
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285 BUTTON_SCROLLBAR_ = new ButtonScheme( |
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286 [ColorConstants.button, ColorConstants.buttonLightest], |
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287 DARKEST_DARKER, |
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288 [ColorConstants.buttonDarker], |
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289 [ColorConstants.buttonDarker] |
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290 ); |
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291 } |
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292 } |
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293 } |
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294 return BUTTON_SCROLLBAR_; |
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295 } |
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296 } |
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297 |
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298 /** |
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299 * Constructs a ButtonBorder with a predefined button scheme set as its default. |
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300 * |
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301 * @since 2.0 |
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302 */ |
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303 public this() { |
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304 setScheme(SCHEMES.BUTTON); |
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305 } |
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306 |
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307 /** |
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308 * Constructs a ButtonBorder with the input ButtonScheme set as its Scheme. |
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309 * |
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310 * @param scheme ButtonScheme for this ButtonBorder. |
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311 * @since 2.0 |
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312 */ |
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313 public this(ButtonScheme scheme) { |
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314 setScheme(scheme); |
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315 } |
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316 |
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317 /** |
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318 * Paints this border with the help of the set scheme, the model of the clickable figure, |
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319 * and other inputs. The scheme is used in conjunction with the state of the model to get |
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320 * the appropriate colors for the border. |
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321 * |
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322 * @param figure The Clickable that this border belongs to |
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323 * @param graphics The graphics used for painting |
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324 * @param insets The insets |
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325 */ |
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326 public void paint(IFigure figure, Graphics graphics, Insets insets) { |
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327 Clickable clickable = cast(Clickable)figure; |
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328 ButtonModel model = clickable.getModel(); |
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329 ButtonScheme colorScheme = cast(ButtonScheme)getScheme(); |
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330 |
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331 if (clickable.isRolloverEnabled() && !model.isMouseOver() |
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332 && !model.isSelected()) |
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333 return; |
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334 |
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335 Color[] tl, br; |
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336 if (model.isSelected() || model.isArmed()) { |
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337 tl = colorScheme.getShadowPressed(); |
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338 br = colorScheme.getHighlightPressed(); |
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339 } else { |
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340 tl = colorScheme.getHighlight(); |
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341 br = colorScheme.getShadow(); |
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342 } |
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343 |
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344 paint(graphics, figure, insets, tl, br); |
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345 } |
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346 |
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347 } |