Mercurial > projects > dynamin
annotate dynamin/gui/container.d @ 68:6580fabb7dce
Setting a property to the value it already is shouldn't do anything
| author | Jordan Miner <jminer7@gmail.com> |
|---|---|
| date | Mon, 10 Aug 2009 02:48:15 -0500 |
| parents | 60832e1eef04 |
| children | 340c3777ea68 |
| rev | line source |
|---|---|
| 0 | 1 // Written in the D programming language |
| 2 // www.digitalmars.com/d/ | |
| 3 | |
| 4 /* | |
| 5 * The contents of this file are subject to the Mozilla Public License Version | |
| 6 * 1.1 (the "License"); you may not use this file except in compliance with | |
| 7 * the License. You may obtain a copy of the License at | |
| 8 * http://www.mozilla.org/MPL/ | |
| 9 * | |
| 10 * Software distributed under the License is distributed on an "AS IS" basis, | |
| 11 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License | |
| 12 * for the specific language governing rights and limitations under the | |
| 13 * License. | |
| 14 * | |
| 15 * The Original Code is the Dynamin library. | |
| 16 * | |
| 17 * The Initial Developer of the Original Code is Jordan Miner. | |
| 18 * Portions created by the Initial Developer are Copyright (C) 2006-2009 | |
| 19 * the Initial Developer. All Rights Reserved. | |
| 20 * | |
| 21 * Contributor(s): | |
| 22 * Jordan Miner <jminer7@gmail.com> | |
| 23 * | |
| 24 */ | |
| 25 | |
| 26 module dynamin.gui.container; | |
| 27 | |
| 28 import dynamin.all_core; | |
| 29 import dynamin.all_painting; | |
| 30 import dynamin.all_gui; | |
| 31 import dynamin.gui.control; | |
| 32 import dynamin.gui.events; | |
| 62 | 33 import dynamin.gui.button; |
| 0 | 34 import tango.io.Stdout; |
| 35 | |
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36 alias List!(Control, true) ControlList; |
| 0 | 37 |
| 38 /// | |
| 39 class Container : Control { | |
| 40 protected: | |
| 41 ControlList _children; | |
| 42 Size _minSize; | |
| 43 Size _maxSize; | |
| 62 | 44 Button _defaultButton; |
| 0 | 45 |
| 46 override void whenResized(EventArgs e) { | |
| 47 layout(); | |
| 48 } | |
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49 // If the specified array is large enough to hold the results, no heap |
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50 // allocation will be done. |
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51 Control[] getFocusableDescendants(Control[] des = null) { |
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52 uint cur = 0; |
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53 |
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54 void addDescendants(Container c) { |
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55 if(c._focusable) { // TODO: && c.enabled) { |
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56 if(cur == des.length) |
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57 des.length = des.length + 20; |
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58 des[cur++] = c; |
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59 } |
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60 foreach(ch; c._children) { |
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61 if(cast(Container)ch) |
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62 addDescendants(cast(Container)ch); |
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63 else if(ch.focusable) { // TODO: && ch.enabled) { |
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64 if(cur == des.length) |
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65 des.length = des.length + 20; |
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66 des[cur++] = ch; |
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67 } |
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68 } |
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69 } |
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70 addDescendants(this); |
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71 return des[0..cur]; |
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72 } |
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73 unittest { |
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74 class MyControl : Control { |
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75 this() { |
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76 _focusable = true; |
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77 } |
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78 } |
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79 auto container1 = new Container(); |
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80 auto container2 = new Container(); |
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81 auto container3 = new Container(); |
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82 auto container4 = new Container(); |
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83 container2._focusable = true; |
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84 container4._focusable = true; |
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85 auto ctrl1 = new MyControl(); |
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86 auto ctrl2 = new MyControl(); |
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87 auto ctrl3 = new MyControl(); |
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88 |
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89 container1.add(container2); |
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90 container1.add(container3); |
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91 container3.add(container4); |
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92 container2.add(ctrl1); |
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93 container4.add(ctrl2); |
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94 container4.add(ctrl3); |
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95 assert(container1.getFocusableDescendants() == |
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96 [cast(Control)container2, ctrl1, container4, ctrl2, ctrl3]); |
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97 Control[5] buf; |
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98 assert(container1.getFocusableDescendants(buf).ptr == buf.ptr); |
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99 } |
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100 |
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101 // not an event |
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102 void whenChildAdded(Control child, int) { |
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103 if(child.parent) |
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104 child.parent.remove(child); |
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105 child.parent = this; |
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106 repaint(); |
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107 |
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108 void callAdded(Control ctrl) { |
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109 scope e = new HierarchyEventArgs(ctrl); |
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110 descendantAdded(e); |
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111 |
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112 if(auto cntr = cast(Container)ctrl) { |
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113 foreach(c; cntr._children) |
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114 callAdded(c); |
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115 } |
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116 } |
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117 callAdded(child); |
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118 } |
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119 |
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120 // not an event |
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121 void whenChildRemoved(Control child, int) { |
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122 child.parent = null; |
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123 repaint(); |
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124 |
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125 scope e = new HierarchyEventArgs(child); |
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126 descendantRemoved(e); |
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127 } |
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128 |
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129 void dispatchDescendantAdded(HierarchyEventArgs e) { |
| 62 | 130 if(e.descendant is defaultButton) |
| 131 (cast(Button)e.descendant)._isDefault = true; | |
| 132 | |
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133 descendantAdded.callHandlers(e); |
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134 descendantAdded.callMainHandler(e); |
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135 e.levels = e.levels + 1; |
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136 if(_parent) |
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137 _parent.descendantAdded(e); |
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138 } |
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139 void dispatchDescendantRemoved(HierarchyEventArgs e) { |
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140 descendantRemoved.callHandlers(e); |
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141 descendantRemoved.callMainHandler(e); |
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142 e.levels = e.levels + 1; |
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143 if(_parent) |
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144 _parent.descendantRemoved(e); |
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145 } |
| 62 | 146 |
| 147 override void whenKeyDown(KeyEventArgs e) { | |
| 148 if(e.key == Key.Enter && defaultButton) { | |
| 149 scope e2 = new EventArgs; | |
| 150 defaultButton.clicked(e2); | |
| 151 e.stopped = true; | |
| 152 } | |
| 153 } | |
| 154 | |
| 0 | 155 public: |
| 156 /// Override this method in a subclass to handle the minSizeChanged event. | |
| 157 protected void whenMinSizeChanged(EventArgs e) { } | |
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158 /// This event occurs after the control's minimum size has been changed. |
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159 Event!(whenMinSizeChanged) minSizeChanged; |
| 0 | 160 |
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161 /// Override this method in a subclass to handle the maxSizeChanged event. |
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162 protected void whenMaxSizeChanged(EventArgs e) { } |
| 0 | 163 /// This event occurs after the control's maximum size has been changed. |
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164 Event!(whenMaxSizeChanged) maxSizeChanged; |
| 0 | 165 |
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166 /// Override this method in a subclass to handle the descendantAdded event. |
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167 protected void whenDescendantAdded(HierarchyEventArgs e) { } |
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168 /// This event occurs after a control is added as a descendant of this container. |
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169 Event!(whenDescendantAdded) descendantAdded; |
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170 |
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171 /// Override this method in a subclass to handle the descendantRemoved event. |
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172 protected void whenDescendantRemoved(HierarchyEventArgs e) { } |
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173 /// This event occurs after a descendant of this container has been removed. |
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174 Event!(whenDescendantRemoved) descendantRemoved; |
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175 |
| 0 | 176 this() { |
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177 minSizeChanged.mainHandler = &whenMinSizeChanged; |
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178 maxSizeChanged.mainHandler = &whenMaxSizeChanged; |
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179 descendantAdded.mainHandler = &whenDescendantAdded; |
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180 descendantAdded.dispatcher = &dispatchDescendantAdded; |
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181 descendantRemoved.mainHandler = &whenDescendantRemoved; |
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182 descendantRemoved.dispatcher = &dispatchDescendantRemoved; |
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183 |
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184 _children = new ControlList(&whenChildAdded, &whenChildRemoved); |
| 0 | 185 |
| 186 elasticX = true; | |
| 187 elasticY = true; | |
| 188 } | |
| 62 | 189 |
| 190 /** | |
| 191 * Gets or sets the default button in this container. | |
| 192 */ | |
| 193 Button defaultButton() { return _defaultButton; } | |
| 194 /// ditto | |
| 195 void defaultButton(Button b) { | |
| 196 _defaultButton = b; | |
| 197 foreach(d; &descendants) { | |
| 198 if(b == d) | |
| 199 b._isDefault = true; | |
| 200 } | |
| 201 } | |
| 202 | |
| 0 | 203 override void dispatchPainting(PaintingEventArgs e) { |
| 204 super.dispatchPainting(e); | |
| 205 foreach(c; _children) { | |
| 206 e.graphics.save(); | |
| 207 e.graphics.translate(c.x, c.y); | |
| 208 c.setupGraphics(e.graphics); | |
| 209 c.painting(e); | |
| 210 e.graphics.restore(); | |
| 211 } | |
| 212 } | |
| 213 // TODO: make these use common code...get rid of copy and paste | |
| 214 override void dispatchMouseDown(MouseEventArgs e) { | |
| 215 auto c = getChildAtPoint(e.location); | |
| 216 if(c && getCaptorControl() !is this) { | |
| 217 e.location = e.location - c.location; | |
| 218 c.mouseDown(e); | |
| 219 e.location = e.location + c.location; | |
| 220 } else { | |
| 221 super.dispatchMouseDown(e); | |
| 222 } | |
| 223 } | |
| 224 override void dispatchMouseUp(MouseEventArgs e) { | |
| 225 auto c = getChildAtPoint(e.location); | |
| 226 if(c && getCaptorControl() !is this) { | |
| 227 e.location = e.location - c.location; | |
| 228 c.mouseUp(e); | |
| 229 e.location = e.location + c.location; | |
| 230 } else { | |
| 231 super.dispatchMouseUp(e); | |
| 232 } | |
| 233 } | |
| 234 override void dispatchMouseMoved(MouseEventArgs e) { | |
| 235 auto c = getChildAtPoint(e.location); | |
| 236 if(c && getCaptorControl() !is this) { | |
| 237 e.location = e.location - c.location; | |
| 238 c.mouseMoved(e); | |
| 239 e.location = e.location + c.location; | |
| 240 } else { | |
| 241 super.dispatchMouseMoved(e); | |
| 242 } | |
| 243 } | |
| 244 override void dispatchMouseDragged(MouseEventArgs e) { | |
| 245 auto c = getChildAtPoint(e.location); | |
| 246 if(c && getCaptorControl() !is this) { | |
| 247 e.location = e.location - c.location; | |
| 248 c.mouseDragged(e); | |
| 249 e.location = e.location + c.location; | |
| 250 } else { | |
| 251 super.dispatchMouseDragged(e); | |
| 252 } | |
| 253 } | |
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254 |
| 0 | 255 /** |
| 256 * Gets the child control at the specified point. If there are | |
| 257 * multiple child controls at the point, the topmost control is returned. | |
| 258 * If there is no child control at the point, null is returned. The returned | |
| 259 * control, if any, is a direct child of this container. | |
| 260 */ | |
| 261 Control getChildAtPoint(real[] pt) { | |
| 262 assert(pt.length == 2, "pt must be just an x and y"); | |
| 263 return getChildAtPoint(Point(pt[0], pt[1])); | |
| 264 } | |
| 265 /// ditto | |
| 266 Control getChildAtPoint(real x, real y) { | |
| 267 return getChildAtPoint(Point(x, y)); | |
| 268 } | |
| 269 /// ditto | |
| 270 Control getChildAtPoint(Point pt) { | |
| 271 for(int i = _children.count-1; i >= 0; --i) { | |
| 272 pt = pt - _children[i].location; | |
| 273 scope(exit) pt = pt + _children[i].location; | |
| 274 if(_children[i].contains(pt)) | |
| 275 return _children[i]; | |
| 276 } | |
| 277 return null; | |
| 278 } | |
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279 |
| 0 | 280 /** |
| 281 * Never returns null. If there is no descendant at the specified point, | |
| 282 * this container will be returned. | |
| 283 */ | |
| 284 Control getDescendantAtPoint(real[] pt) { | |
| 285 assert(pt.length == 2, "pt must be just an x and y"); | |
| 286 return getDescendantAtPoint(Point(pt[0], pt[1])); | |
| 287 } | |
| 288 /// ditto | |
| 289 Control getDescendantAtPoint(real x, real y) { | |
| 290 return getDescendantAtPoint(Point(x, y)); | |
| 291 } | |
| 292 /// ditto | |
| 293 Control getDescendantAtPoint(Point pt) { | |
| 294 Container des = this; | |
| 295 while(true) { | |
| 296 auto child = des.getChildAtPoint(pt); | |
| 297 if(!child) | |
| 298 return des; | |
| 299 auto isContainer = cast(Container)child; | |
| 300 if(isContainer) { | |
| 301 des = isContainer; | |
| 302 pt = pt - des.location; | |
| 303 // loop around with this container | |
| 304 } else { | |
| 305 return child; | |
| 306 } | |
| 307 } | |
| 308 } | |
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309 |
| 0 | 310 /** |
| 311 * Gets or sets the minimum size of this window. A minimum width or | |
| 312 * height of 0 means that there is no minimum width or height. | |
| 313 * The default is Size(0, 0). | |
| 314 */ | |
| 315 Size minSize() { return _minSize; } | |
| 316 /// ditto | |
| 317 void minSize(Size size) { | |
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318 if(_minSize == size) |
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319 return; |
| 0 | 320 _minSize = size; |
| 321 minSizeChanged(new EventArgs); | |
| 322 } | |
| 323 /// ditto | |
| 324 void minSize(real[] size) { | |
| 325 assert(size.length == 2, "size must be just a width and height"); | |
| 326 minSize = Size(size[0], size[1]); | |
| 327 } | |
| 328 /// | |
| 329 real minWidth() { return _minSize.width; } | |
| 330 /// | |
| 331 real minHeight() { return _minSize.height; } | |
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332 |
| 0 | 333 /** |
| 334 * Gets or sets the maximum size of this window. A maximum width or | |
| 335 * height of 0 means that there is no maximum width or height. | |
| 336 * The default is Size(0, 0). | |
| 337 */ | |
| 338 Size maxSize() { return _maxSize; } | |
| 339 /// ditto | |
| 340 void maxSize(Size size) { | |
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341 if(_maxSize == size) |
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342 return; |
| 0 | 343 _maxSize = size; |
| 344 minSizeChanged(new EventArgs); | |
| 345 } | |
| 346 /// ditto | |
| 347 void maxSize(real[] size) { | |
| 348 assert(size.length == 2, "size must be just a width and height"); | |
| 349 maxSize = Size(size[0], size[1]); | |
| 350 } | |
| 351 /// | |
| 352 real maxWidth() { return _maxSize.width; } | |
| 353 /// | |
| 354 real maxHeight() { return _maxSize.height; } | |
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355 |
| 0 | 356 /** |
| 357 * Causes this container to position its child controls. Called on every | |
| 358 * resize. Usually, this function will get each child's best size, and | |
| 359 * then set each child's location and height. The definition in Container | |
| 360 * is empty, as it is intended for subclasses to override. | |
| 361 */ | |
| 362 void layout() { | |
| 363 } | |
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364 |
| 0 | 365 protected void add(Control child) { |
| 366 _children.add(child); | |
| 367 } | |
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368 |
| 0 | 369 protected void remove(Control child) { |
| 370 _children.remove(child); | |
| 371 } | |
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372 |
| 58 | 373 /** |
| 374 * Calls the specified delegate with each child of this container, for | |
| 375 * use with foreach. | |
| 376 */ | |
| 377 int opApply(int delegate(ref Control item) dg) { | |
| 0 | 378 for(uint i = 0; i < _children.count; ++i) { |
| 379 auto tmp = _children[i]; | |
| 380 if(int result = dg(tmp)) | |
| 381 return result; | |
| 382 } | |
| 383 return 0; | |
| 384 } | |
| 58 | 385 /// ditto |
| 386 int opApply(int delegate(ref uint index, ref Control item) dg) { | |
| 0 | 387 for(uint i = 0; i < _children.count; ++i) { |
| 388 auto tmp = _children[i]; | |
| 389 if(int result = dg(i, tmp)) | |
| 390 return result; | |
| 391 } | |
| 392 return 0; | |
| 393 } | |
| 57 | 394 /** |
| 395 * Calls the specified delegate with each descendant of this container, for | |
| 396 * use with foreach. | |
| 397 * | |
| 398 * Example: | |
| 399 * ----- | |
| 400 * foreach(c; &container.descendants) { | |
| 401 * // do something with c | |
| 402 * } | |
| 403 * ----- | |
| 404 */ | |
| 405 int descendants(int delegate(ref Control item) dg) { | |
| 406 for(int i = 0; i < _children.count; ++i) { | |
| 407 auto tmp = _children[i]; | |
| 408 if(int result = dg(tmp)) | |
| 409 return result; | |
| 410 auto c = cast(Container)_children[i]; | |
| 411 if(c) | |
| 412 if(int result = c.descendants(dg)) | |
| 413 return result; | |
| 414 } | |
| 415 return 0; | |
| 416 } | |
| 417 /** | |
| 418 * Same as descendants(), but includes this container in addition to | |
| 419 * descendants. | |
| 420 */ | |
| 421 int descendantsPlus(int delegate(ref Control item) dg) { | |
| 422 Control tmp = this; | |
| 423 if(int result = dg(tmp)) | |
| 424 return result; | |
| 425 if(int result = descendants(dg)) | |
| 426 return result; | |
| 427 return 0; | |
| 428 } | |
| 0 | 429 } |
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430 unittest { |
| 57 | 431 int a = 0, r = 0; |
| 432 auto container1 = new Panel; | |
| 433 auto container2 = new Panel; | |
| 434 auto control1 = new Control; | |
| 435 auto control2 = new Control; | |
| 436 auto control3 = new Control; | |
| 437 container1.descendantAdded += (HierarchyEventArgs e) { a++; }; | |
| 438 container1.descendantRemoved += (HierarchyEventArgs e) { r++; }; | |
| 439 | |
| 440 container2.add(control2); | |
| 441 container2.children.add(control3); | |
| 442 assert(control3.parent == container2); | |
| 443 container1.add(control1); | |
| 444 assert(a == 1); // test descendantAdded | |
| 445 container1.add(container2); | |
| 446 assert(a == 4); // test descendantAdded | |
| 447 | |
| 448 // test Container.descendants | |
| 449 auto list = new List!(Control); | |
| 450 foreach(c; &container1.descendants) | |
| 451 list.add(c); | |
| 452 assert(list.data == [control1, container2, control2, control3]); | |
| 453 | |
| 454 list.clear(); | |
| 455 foreach(c; &container1.descendantsPlus) | |
| 456 list.add(c); | |
| 457 assert(list.data == [cast(Control)container1, control1, container2, | |
| 458 control2, control3]); | |
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459 } |
| 0 | 460 |
| 58 | 461 /// |
| 0 | 462 class Panel : Container { |
| 58 | 463 /// |
| 0 | 464 ControlList children() { return _children; } |
| 58 | 465 /// |
| 0 | 466 void add(Control child) { super.add(child); }; |
| 58 | 467 /// |
| 0 | 468 void remove(Control child) { super.remove(child); }; |
| 58 | 469 /// |
| 470 int opApply(int delegate(ref Control item) dg) { | |
| 0 | 471 return super.opApply(dg); |
| 472 } | |
| 58 | 473 /// |
| 474 int opApply(int delegate(ref uint index, ref Control item) dg) { | |
| 0 | 475 return super.opApply(dg); |
| 476 } | |
| 477 } | |
| 478 |