Mercurial > projects > dynamin
annotate dynamin/gui/container.d @ 70:340c3777ea68
Use Container.descendantsPlus in getFocusableDescendants for shorter code.
| author | Jordan Miner <jminer7@gmail.com> |
|---|---|
| date | Mon, 10 Aug 2009 03:38:06 -0500 |
| parents | 6580fabb7dce |
| children | 651082a9b364 |
| 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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70
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53 foreach(d; &descendantsPlus) { |
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54 if(d.focusable) { // TODO: && ch.enabled) { |
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55 if(cur == des.length) |
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56 des.length = des.length + 20; |
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57 des[cur++] = d; |
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58 } |
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59 } |
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60 return des[0..cur]; |
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61 } |
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62 unittest { |
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63 class MyControl : Control { |
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64 this() { |
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65 _focusable = true; |
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66 } |
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67 } |
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68 auto container1 = new Container(); |
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69 auto container2 = new Container(); |
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70 auto container3 = new Container(); |
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71 auto container4 = new Container(); |
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72 container2._focusable = true; |
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73 container4._focusable = true; |
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74 auto ctrl1 = new MyControl(); |
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75 auto ctrl2 = new MyControl(); |
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76 auto ctrl3 = new MyControl(); |
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77 |
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78 container1.add(container2); |
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79 container1.add(container3); |
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80 container3.add(container4); |
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81 container2.add(ctrl1); |
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82 container4.add(ctrl2); |
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83 container4.add(ctrl3); |
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84 assert(container1.getFocusableDescendants() == |
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85 [cast(Control)container2, ctrl1, container4, ctrl2, ctrl3]); |
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86 Control[5] buf; |
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87 assert(container1.getFocusableDescendants(buf).ptr == buf.ptr); |
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88 } |
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89 |
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90 // not an event |
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91 void whenChildAdded(Control child, int) { |
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92 if(child.parent) |
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93 child.parent.remove(child); |
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94 child.parent = this; |
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95 repaint(); |
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96 |
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97 void callAdded(Control ctrl) { |
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98 scope e = new HierarchyEventArgs(ctrl); |
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99 descendantAdded(e); |
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100 |
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101 if(auto cntr = cast(Container)ctrl) { |
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102 foreach(c; cntr._children) |
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103 callAdded(c); |
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104 } |
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105 } |
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106 callAdded(child); |
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107 } |
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108 |
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109 // not an event |
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110 void whenChildRemoved(Control child, int) { |
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111 child.parent = null; |
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112 repaint(); |
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113 |
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114 scope e = new HierarchyEventArgs(child); |
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115 descendantRemoved(e); |
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116 } |
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117 |
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118 void dispatchDescendantAdded(HierarchyEventArgs e) { |
| 62 | 119 if(e.descendant is defaultButton) |
| 120 (cast(Button)e.descendant)._isDefault = true; | |
| 121 | |
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122 descendantAdded.callHandlers(e); |
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123 descendantAdded.callMainHandler(e); |
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124 e.levels = e.levels + 1; |
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125 if(_parent) |
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126 _parent.descendantAdded(e); |
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127 } |
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128 void dispatchDescendantRemoved(HierarchyEventArgs e) { |
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129 descendantRemoved.callHandlers(e); |
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130 descendantRemoved.callMainHandler(e); |
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131 e.levels = e.levels + 1; |
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132 if(_parent) |
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133 _parent.descendantRemoved(e); |
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134 } |
| 62 | 135 |
| 136 override void whenKeyDown(KeyEventArgs e) { | |
| 137 if(e.key == Key.Enter && defaultButton) { | |
| 138 scope e2 = new EventArgs; | |
| 139 defaultButton.clicked(e2); | |
| 140 e.stopped = true; | |
| 141 } | |
| 142 } | |
| 143 | |
| 0 | 144 public: |
| 145 /// Override this method in a subclass to handle the minSizeChanged event. | |
| 146 protected void whenMinSizeChanged(EventArgs e) { } | |
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147 /// This event occurs after the control's minimum size has been changed. |
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148 Event!(whenMinSizeChanged) minSizeChanged; |
| 0 | 149 |
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150 /// Override this method in a subclass to handle the maxSizeChanged event. |
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151 protected void whenMaxSizeChanged(EventArgs e) { } |
| 0 | 152 /// This event occurs after the control's maximum size has been changed. |
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153 Event!(whenMaxSizeChanged) maxSizeChanged; |
| 0 | 154 |
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155 /// Override this method in a subclass to handle the descendantAdded event. |
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156 protected void whenDescendantAdded(HierarchyEventArgs e) { } |
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157 /// This event occurs after a control is added as a descendant of this container. |
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158 Event!(whenDescendantAdded) descendantAdded; |
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159 |
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160 /// Override this method in a subclass to handle the descendantRemoved event. |
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161 protected void whenDescendantRemoved(HierarchyEventArgs e) { } |
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162 /// This event occurs after a descendant of this container has been removed. |
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163 Event!(whenDescendantRemoved) descendantRemoved; |
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164 |
| 0 | 165 this() { |
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166 minSizeChanged.mainHandler = &whenMinSizeChanged; |
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167 maxSizeChanged.mainHandler = &whenMaxSizeChanged; |
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168 descendantAdded.mainHandler = &whenDescendantAdded; |
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169 descendantAdded.dispatcher = &dispatchDescendantAdded; |
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170 descendantRemoved.mainHandler = &whenDescendantRemoved; |
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171 descendantRemoved.dispatcher = &dispatchDescendantRemoved; |
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172 |
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173 _children = new ControlList(&whenChildAdded, &whenChildRemoved); |
| 0 | 174 |
| 175 elasticX = true; | |
| 176 elasticY = true; | |
| 177 } | |
| 62 | 178 |
| 179 /** | |
| 180 * Gets or sets the default button in this container. | |
| 181 */ | |
| 182 Button defaultButton() { return _defaultButton; } | |
| 183 /// ditto | |
| 184 void defaultButton(Button b) { | |
| 185 _defaultButton = b; | |
| 186 foreach(d; &descendants) { | |
| 187 if(b == d) | |
| 188 b._isDefault = true; | |
| 189 } | |
| 190 } | |
| 191 | |
| 0 | 192 override void dispatchPainting(PaintingEventArgs e) { |
| 193 super.dispatchPainting(e); | |
| 194 foreach(c; _children) { | |
| 195 e.graphics.save(); | |
| 196 e.graphics.translate(c.x, c.y); | |
| 197 c.setupGraphics(e.graphics); | |
| 198 c.painting(e); | |
| 199 e.graphics.restore(); | |
| 200 } | |
| 201 } | |
| 202 // TODO: make these use common code...get rid of copy and paste | |
| 203 override void dispatchMouseDown(MouseEventArgs e) { | |
| 204 auto c = getChildAtPoint(e.location); | |
| 205 if(c && getCaptorControl() !is this) { | |
| 206 e.location = e.location - c.location; | |
| 207 c.mouseDown(e); | |
| 208 e.location = e.location + c.location; | |
| 209 } else { | |
| 210 super.dispatchMouseDown(e); | |
| 211 } | |
| 212 } | |
| 213 override void dispatchMouseUp(MouseEventArgs e) { | |
| 214 auto c = getChildAtPoint(e.location); | |
| 215 if(c && getCaptorControl() !is this) { | |
| 216 e.location = e.location - c.location; | |
| 217 c.mouseUp(e); | |
| 218 e.location = e.location + c.location; | |
| 219 } else { | |
| 220 super.dispatchMouseUp(e); | |
| 221 } | |
| 222 } | |
| 223 override void dispatchMouseMoved(MouseEventArgs e) { | |
| 224 auto c = getChildAtPoint(e.location); | |
| 225 if(c && getCaptorControl() !is this) { | |
| 226 e.location = e.location - c.location; | |
| 227 c.mouseMoved(e); | |
| 228 e.location = e.location + c.location; | |
| 229 } else { | |
| 230 super.dispatchMouseMoved(e); | |
| 231 } | |
| 232 } | |
| 233 override void dispatchMouseDragged(MouseEventArgs e) { | |
| 234 auto c = getChildAtPoint(e.location); | |
| 235 if(c && getCaptorControl() !is this) { | |
| 236 e.location = e.location - c.location; | |
| 237 c.mouseDragged(e); | |
| 238 e.location = e.location + c.location; | |
| 239 } else { | |
| 240 super.dispatchMouseDragged(e); | |
| 241 } | |
| 242 } | |
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243 |
| 0 | 244 /** |
| 245 * Gets the child control at the specified point. If there are | |
| 246 * multiple child controls at the point, the topmost control is returned. | |
| 247 * If there is no child control at the point, null is returned. The returned | |
| 248 * control, if any, is a direct child of this container. | |
| 249 */ | |
| 250 Control getChildAtPoint(real[] pt) { | |
| 251 assert(pt.length == 2, "pt must be just an x and y"); | |
| 252 return getChildAtPoint(Point(pt[0], pt[1])); | |
| 253 } | |
| 254 /// ditto | |
| 255 Control getChildAtPoint(real x, real y) { | |
| 256 return getChildAtPoint(Point(x, y)); | |
| 257 } | |
| 258 /// ditto | |
| 259 Control getChildAtPoint(Point pt) { | |
| 260 for(int i = _children.count-1; i >= 0; --i) { | |
| 261 pt = pt - _children[i].location; | |
| 262 scope(exit) pt = pt + _children[i].location; | |
| 263 if(_children[i].contains(pt)) | |
| 264 return _children[i]; | |
| 265 } | |
| 266 return null; | |
| 267 } | |
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268 |
| 0 | 269 /** |
| 270 * Never returns null. If there is no descendant at the specified point, | |
| 271 * this container will be returned. | |
| 272 */ | |
| 273 Control getDescendantAtPoint(real[] pt) { | |
| 274 assert(pt.length == 2, "pt must be just an x and y"); | |
| 275 return getDescendantAtPoint(Point(pt[0], pt[1])); | |
| 276 } | |
| 277 /// ditto | |
| 278 Control getDescendantAtPoint(real x, real y) { | |
| 279 return getDescendantAtPoint(Point(x, y)); | |
| 280 } | |
| 281 /// ditto | |
| 282 Control getDescendantAtPoint(Point pt) { | |
| 283 Container des = this; | |
| 284 while(true) { | |
| 285 auto child = des.getChildAtPoint(pt); | |
| 286 if(!child) | |
| 287 return des; | |
| 288 auto isContainer = cast(Container)child; | |
| 289 if(isContainer) { | |
| 290 des = isContainer; | |
| 291 pt = pt - des.location; | |
| 292 // loop around with this container | |
| 293 } else { | |
| 294 return child; | |
| 295 } | |
| 296 } | |
| 297 } | |
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298 |
| 0 | 299 /** |
| 300 * Gets or sets the minimum size of this window. A minimum width or | |
| 301 * height of 0 means that there is no minimum width or height. | |
| 302 * The default is Size(0, 0). | |
| 303 */ | |
| 304 Size minSize() { return _minSize; } | |
| 305 /// ditto | |
| 306 void minSize(Size size) { | |
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307 if(_minSize == size) |
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308 return; |
| 0 | 309 _minSize = size; |
| 310 minSizeChanged(new EventArgs); | |
| 311 } | |
| 312 /// ditto | |
| 313 void minSize(real[] size) { | |
| 314 assert(size.length == 2, "size must be just a width and height"); | |
| 315 minSize = Size(size[0], size[1]); | |
| 316 } | |
| 317 /// | |
| 318 real minWidth() { return _minSize.width; } | |
| 319 /// | |
| 320 real minHeight() { return _minSize.height; } | |
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321 |
| 0 | 322 /** |
| 323 * Gets or sets the maximum size of this window. A maximum width or | |
| 324 * height of 0 means that there is no maximum width or height. | |
| 325 * The default is Size(0, 0). | |
| 326 */ | |
| 327 Size maxSize() { return _maxSize; } | |
| 328 /// ditto | |
| 329 void maxSize(Size size) { | |
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330 if(_maxSize == size) |
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331 return; |
| 0 | 332 _maxSize = size; |
| 333 minSizeChanged(new EventArgs); | |
| 334 } | |
| 335 /// ditto | |
| 336 void maxSize(real[] size) { | |
| 337 assert(size.length == 2, "size must be just a width and height"); | |
| 338 maxSize = Size(size[0], size[1]); | |
| 339 } | |
| 340 /// | |
| 341 real maxWidth() { return _maxSize.width; } | |
| 342 /// | |
| 343 real maxHeight() { return _maxSize.height; } | |
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344 |
| 0 | 345 /** |
| 346 * Causes this container to position its child controls. Called on every | |
| 347 * resize. Usually, this function will get each child's best size, and | |
| 348 * then set each child's location and height. The definition in Container | |
| 349 * is empty, as it is intended for subclasses to override. | |
| 350 */ | |
| 351 void layout() { | |
| 352 } | |
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353 |
| 0 | 354 protected void add(Control child) { |
| 355 _children.add(child); | |
| 356 } | |
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357 |
| 0 | 358 protected void remove(Control child) { |
| 359 _children.remove(child); | |
| 360 } | |
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361 |
| 58 | 362 /** |
| 363 * Calls the specified delegate with each child of this container, for | |
| 364 * use with foreach. | |
| 365 */ | |
| 366 int opApply(int delegate(ref Control item) dg) { | |
| 0 | 367 for(uint i = 0; i < _children.count; ++i) { |
| 368 auto tmp = _children[i]; | |
| 369 if(int result = dg(tmp)) | |
| 370 return result; | |
| 371 } | |
| 372 return 0; | |
| 373 } | |
| 58 | 374 /// ditto |
| 375 int opApply(int delegate(ref uint index, ref Control item) dg) { | |
| 0 | 376 for(uint i = 0; i < _children.count; ++i) { |
| 377 auto tmp = _children[i]; | |
| 378 if(int result = dg(i, tmp)) | |
| 379 return result; | |
| 380 } | |
| 381 return 0; | |
| 382 } | |
| 57 | 383 /** |
| 384 * Calls the specified delegate with each descendant of this container, for | |
| 385 * use with foreach. | |
| 386 * | |
| 387 * Example: | |
| 388 * ----- | |
| 389 * foreach(c; &container.descendants) { | |
| 390 * // do something with c | |
| 391 * } | |
| 392 * ----- | |
| 393 */ | |
| 394 int descendants(int delegate(ref Control item) dg) { | |
| 395 for(int i = 0; i < _children.count; ++i) { | |
| 396 auto tmp = _children[i]; | |
| 397 if(int result = dg(tmp)) | |
| 398 return result; | |
| 399 auto c = cast(Container)_children[i]; | |
| 400 if(c) | |
| 401 if(int result = c.descendants(dg)) | |
| 402 return result; | |
| 403 } | |
| 404 return 0; | |
| 405 } | |
| 406 /** | |
| 407 * Same as descendants(), but includes this container in addition to | |
| 408 * descendants. | |
| 409 */ | |
| 410 int descendantsPlus(int delegate(ref Control item) dg) { | |
| 411 Control tmp = this; | |
| 412 if(int result = dg(tmp)) | |
| 413 return result; | |
| 414 if(int result = descendants(dg)) | |
| 415 return result; | |
| 416 return 0; | |
| 417 } | |
| 0 | 418 } |
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419 unittest { |
| 57 | 420 int a = 0, r = 0; |
| 421 auto container1 = new Panel; | |
| 422 auto container2 = new Panel; | |
| 423 auto control1 = new Control; | |
| 424 auto control2 = new Control; | |
| 425 auto control3 = new Control; | |
| 426 container1.descendantAdded += (HierarchyEventArgs e) { a++; }; | |
| 427 container1.descendantRemoved += (HierarchyEventArgs e) { r++; }; | |
| 428 | |
| 429 container2.add(control2); | |
| 430 container2.children.add(control3); | |
| 431 assert(control3.parent == container2); | |
| 432 container1.add(control1); | |
| 433 assert(a == 1); // test descendantAdded | |
| 434 container1.add(container2); | |
| 435 assert(a == 4); // test descendantAdded | |
| 436 | |
| 437 // test Container.descendants | |
| 438 auto list = new List!(Control); | |
| 439 foreach(c; &container1.descendants) | |
| 440 list.add(c); | |
| 441 assert(list.data == [control1, container2, control2, control3]); | |
| 442 | |
| 443 list.clear(); | |
| 444 foreach(c; &container1.descendantsPlus) | |
| 445 list.add(c); | |
| 446 assert(list.data == [cast(Control)container1, control1, container2, | |
| 447 control2, control3]); | |
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448 } |
| 0 | 449 |
| 58 | 450 /// |
| 0 | 451 class Panel : Container { |
| 58 | 452 /// |
| 0 | 453 ControlList children() { return _children; } |
| 58 | 454 /// |
| 0 | 455 void add(Control child) { super.add(child); }; |
| 58 | 456 /// |
| 0 | 457 void remove(Control child) { super.remove(child); }; |
| 58 | 458 /// |
| 459 int opApply(int delegate(ref Control item) dg) { | |
| 0 | 460 return super.opApply(dg); |
| 461 } | |
| 58 | 462 /// |
| 463 int opApply(int delegate(ref uint index, ref Control item) dg) { | |
| 0 | 464 return super.opApply(dg); |
| 465 } | |
| 466 } | |
| 467 |