Mercurial > projects > dynamin
annotate dynamin/gui/container.d @ 55:c138461bf845
Add focusing and other changes that are related
like descendantAdded/Removed events, Window.activated event, and updating List.
Window.state was also added, even though focusing does not depend on it.
| author | Jordan Miner <jminer7@gmail.com> |
|---|---|
| date | Sat, 08 Aug 2009 15:42:27 -0500 |
| parents | ee9a564d2814 |
| children | c2566ab82535 |
| 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; | |
| 33 import tango.io.Stdout; | |
| 34 | |
|
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35 alias List!(Control, true) ControlList; |
| 0 | 36 |
| 37 /// | |
| 38 class Container : Control { | |
| 39 protected: | |
| 40 ControlList _children; | |
| 41 Size _minSize; | |
| 42 Size _maxSize; | |
| 43 | |
| 44 override void whenResized(EventArgs e) { | |
| 45 layout(); | |
| 46 } | |
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47 // If the specified array is large enough to hold the results, no heap |
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48 // allocation will be done. |
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49 Control[] getFocusableDescendants(Control[] des = null) { |
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50 uint cur = 0; |
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51 |
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52 void addDescendants(Container c) { |
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53 if(c._focusable) { // TODO: && c.enabled) { |
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54 if(cur == des.length) |
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55 des.length = des.length + 20; |
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56 des[cur++] = c; |
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57 } |
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58 foreach(ch; c._children) { |
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59 if(cast(Container)ch) |
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60 addDescendants(cast(Container)ch); |
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61 else if(ch.focusable) { // TODO: && ch.enabled) { |
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62 if(cur == des.length) |
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63 des.length = des.length + 20; |
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64 des[cur++] = ch; |
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65 } |
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66 } |
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67 } |
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68 addDescendants(this); |
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69 return des[0..cur]; |
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70 } |
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71 unittest { |
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72 class MyControl : Control { |
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73 this() { |
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74 _focusable = true; |
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75 } |
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76 } |
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77 auto container1 = new Container(); |
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78 auto container2 = new Container(); |
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79 auto container3 = new Container(); |
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80 auto container4 = new Container(); |
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81 container2._focusable = true; |
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82 container4._focusable = true; |
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83 auto ctrl1 = new MyControl(); |
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84 auto ctrl2 = new MyControl(); |
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85 auto ctrl3 = new MyControl(); |
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86 |
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87 container1.add(container2); |
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88 container1.add(container3); |
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89 container3.add(container4); |
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90 container2.add(ctrl1); |
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91 container4.add(ctrl2); |
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92 container4.add(ctrl3); |
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93 assert(container1.getFocusableDescendants() == |
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94 [cast(Control)container2, ctrl1, container4, ctrl2, ctrl3]); |
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95 Control[5] buf; |
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96 assert(container1.getFocusableDescendants(buf).ptr == buf.ptr); |
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97 } |
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98 |
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99 // not an event |
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100 void whenChildAdded(Control child, int) { |
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101 if(child.parent) |
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102 child.parent.remove(child); |
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103 child.parent = this; |
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104 repaint(); |
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105 |
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106 void callAdded(Control ctrl) { |
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107 scope e = new HierarchyEventArgs(ctrl); |
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108 descendantAdded(e); |
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109 |
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110 if(auto cntr = cast(Container)ctrl) { |
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111 foreach(c; cntr._children) |
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112 callAdded(c); |
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113 } |
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114 } |
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115 callAdded(child); |
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116 } |
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117 |
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118 // not an event |
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119 void whenChildRemoved(Control child, int) { |
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120 child.parent = null; |
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121 repaint(); |
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122 |
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123 scope e = new HierarchyEventArgs(child); |
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124 descendantRemoved(e); |
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125 } |
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126 |
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127 void dispatchDescendantAdded(HierarchyEventArgs e) { |
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128 descendantAdded.callHandlers(e); |
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129 descendantAdded.callMainHandler(e); |
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130 e.levels = e.levels + 1; |
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131 if(_parent) |
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132 _parent.descendantAdded(e); |
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133 } |
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134 void dispatchDescendantRemoved(HierarchyEventArgs e) { |
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135 descendantRemoved.callHandlers(e); |
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136 descendantRemoved.callMainHandler(e); |
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137 e.levels = e.levels + 1; |
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138 if(_parent) |
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139 _parent.descendantRemoved(e); |
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140 } |
| 0 | 141 public: |
| 142 /// Override this method in a subclass to handle the minSizeChanged event. | |
| 143 protected void whenMinSizeChanged(EventArgs e) { } | |
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144 /// This event occurs after the control's minimum size has been changed. |
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145 Event!(whenMinSizeChanged) minSizeChanged; |
| 0 | 146 |
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147 /// Override this method in a subclass to handle the maxSizeChanged event. |
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148 protected void whenMaxSizeChanged(EventArgs e) { } |
| 0 | 149 /// This event occurs after the control's maximum size has been changed. |
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150 Event!(whenMaxSizeChanged) maxSizeChanged; |
| 0 | 151 |
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152 /// Override this method in a subclass to handle the descendantAdded event. |
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153 protected void whenDescendantAdded(HierarchyEventArgs e) { } |
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154 /// This event occurs after a control is added as a descendant of this container. |
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155 Event!(whenDescendantAdded) descendantAdded; |
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156 |
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157 /// Override this method in a subclass to handle the descendantRemoved event. |
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158 protected void whenDescendantRemoved(HierarchyEventArgs e) { } |
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159 /// This event occurs after a descendant of this container has been removed. |
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160 Event!(whenDescendantRemoved) descendantRemoved; |
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161 |
| 0 | 162 this() { |
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163 minSizeChanged.mainHandler = &whenMinSizeChanged; |
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164 maxSizeChanged.mainHandler = &whenMaxSizeChanged; |
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165 descendantAdded.mainHandler = &whenDescendantAdded; |
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166 descendantAdded.dispatcher = &dispatchDescendantAdded; |
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167 descendantRemoved.mainHandler = &whenDescendantRemoved; |
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168 descendantRemoved.dispatcher = &dispatchDescendantRemoved; |
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169 |
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170 _children = new ControlList(&whenChildAdded, &whenChildRemoved); |
| 0 | 171 |
| 172 elasticX = true; | |
| 173 elasticY = true; | |
| 174 } | |
| 175 override void dispatchPainting(PaintingEventArgs e) { | |
| 176 super.dispatchPainting(e); | |
| 177 foreach(c; _children) { | |
| 178 e.graphics.save(); | |
| 179 e.graphics.translate(c.x, c.y); | |
| 180 c.setupGraphics(e.graphics); | |
| 181 c.painting(e); | |
| 182 e.graphics.restore(); | |
| 183 } | |
| 184 } | |
| 185 // TODO: make these use common code...get rid of copy and paste | |
| 186 override void dispatchMouseDown(MouseEventArgs e) { | |
| 187 auto c = getChildAtPoint(e.location); | |
| 188 if(c && getCaptorControl() !is this) { | |
| 189 e.location = e.location - c.location; | |
| 190 c.mouseDown(e); | |
| 191 e.location = e.location + c.location; | |
| 192 } else { | |
| 193 super.dispatchMouseDown(e); | |
| 194 } | |
| 195 } | |
| 196 override void dispatchMouseUp(MouseEventArgs e) { | |
| 197 auto c = getChildAtPoint(e.location); | |
| 198 if(c && getCaptorControl() !is this) { | |
| 199 e.location = e.location - c.location; | |
| 200 c.mouseUp(e); | |
| 201 e.location = e.location + c.location; | |
| 202 } else { | |
| 203 super.dispatchMouseUp(e); | |
| 204 } | |
| 205 } | |
| 206 override void dispatchMouseMoved(MouseEventArgs e) { | |
| 207 auto c = getChildAtPoint(e.location); | |
| 208 if(c && getCaptorControl() !is this) { | |
| 209 e.location = e.location - c.location; | |
| 210 c.mouseMoved(e); | |
| 211 e.location = e.location + c.location; | |
| 212 } else { | |
| 213 super.dispatchMouseMoved(e); | |
| 214 } | |
| 215 } | |
| 216 override void dispatchMouseDragged(MouseEventArgs e) { | |
| 217 auto c = getChildAtPoint(e.location); | |
| 218 if(c && getCaptorControl() !is this) { | |
| 219 e.location = e.location - c.location; | |
| 220 c.mouseDragged(e); | |
| 221 e.location = e.location + c.location; | |
| 222 } else { | |
| 223 super.dispatchMouseDragged(e); | |
| 224 } | |
| 225 } | |
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226 |
| 0 | 227 /** |
| 228 * Gets the child control at the specified point. If there are | |
| 229 * multiple child controls at the point, the topmost control is returned. | |
| 230 * If there is no child control at the point, null is returned. The returned | |
| 231 * control, if any, is a direct child of this container. | |
| 232 */ | |
| 233 Control getChildAtPoint(real[] pt) { | |
| 234 assert(pt.length == 2, "pt must be just an x and y"); | |
| 235 return getChildAtPoint(Point(pt[0], pt[1])); | |
| 236 } | |
| 237 /// ditto | |
| 238 Control getChildAtPoint(real x, real y) { | |
| 239 return getChildAtPoint(Point(x, y)); | |
| 240 } | |
| 241 /// ditto | |
| 242 Control getChildAtPoint(Point pt) { | |
| 243 for(int i = _children.count-1; i >= 0; --i) { | |
| 244 pt = pt - _children[i].location; | |
| 245 scope(exit) pt = pt + _children[i].location; | |
| 246 if(_children[i].contains(pt)) | |
| 247 return _children[i]; | |
| 248 } | |
| 249 return null; | |
| 250 } | |
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251 |
| 0 | 252 /** |
| 253 * Never returns null. If there is no descendant at the specified point, | |
| 254 * this container will be returned. | |
| 255 */ | |
| 256 Control getDescendantAtPoint(real[] pt) { | |
| 257 assert(pt.length == 2, "pt must be just an x and y"); | |
| 258 return getDescendantAtPoint(Point(pt[0], pt[1])); | |
| 259 } | |
| 260 /// ditto | |
| 261 Control getDescendantAtPoint(real x, real y) { | |
| 262 return getDescendantAtPoint(Point(x, y)); | |
| 263 } | |
| 264 /// ditto | |
| 265 Control getDescendantAtPoint(Point pt) { | |
| 266 Container des = this; | |
| 267 while(true) { | |
| 268 auto child = des.getChildAtPoint(pt); | |
| 269 if(!child) | |
| 270 return des; | |
| 271 auto isContainer = cast(Container)child; | |
| 272 if(isContainer) { | |
| 273 des = isContainer; | |
| 274 pt = pt - des.location; | |
| 275 // loop around with this container | |
| 276 } else { | |
| 277 return child; | |
| 278 } | |
| 279 } | |
| 280 } | |
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281 |
| 0 | 282 /** |
| 283 * Gets or sets the minimum size of this window. A minimum width or | |
| 284 * height of 0 means that there is no minimum width or height. | |
| 285 * The default is Size(0, 0). | |
| 286 */ | |
| 287 Size minSize() { return _minSize; } | |
| 288 /// ditto | |
| 289 void minSize(Size size) { | |
| 290 _minSize = size; | |
| 291 minSizeChanged(new EventArgs); | |
| 292 } | |
| 293 /// ditto | |
| 294 void minSize(real[] size) { | |
| 295 assert(size.length == 2, "size must be just a width and height"); | |
| 296 minSize = Size(size[0], size[1]); | |
| 297 } | |
| 298 /// | |
| 299 real minWidth() { return _minSize.width; } | |
| 300 /// | |
| 301 real minHeight() { return _minSize.height; } | |
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302 |
| 0 | 303 /** |
| 304 * Gets or sets the maximum size of this window. A maximum width or | |
| 305 * height of 0 means that there is no maximum width or height. | |
| 306 * The default is Size(0, 0). | |
| 307 */ | |
| 308 Size maxSize() { return _maxSize; } | |
| 309 /// ditto | |
| 310 void maxSize(Size size) { | |
| 311 _maxSize = size; | |
| 312 minSizeChanged(new EventArgs); | |
| 313 } | |
| 314 /// ditto | |
| 315 void maxSize(real[] size) { | |
| 316 assert(size.length == 2, "size must be just a width and height"); | |
| 317 maxSize = Size(size[0], size[1]); | |
| 318 } | |
| 319 /// | |
| 320 real maxWidth() { return _maxSize.width; } | |
| 321 /// | |
| 322 real maxHeight() { return _maxSize.height; } | |
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323 |
| 0 | 324 /** |
| 325 * Causes this container to position its child controls. Called on every | |
| 326 * resize. Usually, this function will get each child's best size, and | |
| 327 * then set each child's location and height. The definition in Container | |
| 328 * is empty, as it is intended for subclasses to override. | |
| 329 */ | |
| 330 void layout() { | |
| 331 } | |
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332 |
| 0 | 333 protected void add(Control child) { |
| 334 _children.add(child); | |
| 335 } | |
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336 |
| 0 | 337 protected void remove(Control child) { |
| 338 _children.remove(child); | |
| 339 } | |
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340 |
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341 int opApply(int delegate(inout Control item) dg) { |
| 0 | 342 for(uint i = 0; i < _children.count; ++i) { |
| 343 auto tmp = _children[i]; | |
| 344 if(int result = dg(tmp)) | |
| 345 return result; | |
| 346 } | |
| 347 return 0; | |
| 348 } | |
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349 int opApply(int delegate(inout uint index, inout Control item) dg) { |
| 0 | 350 for(uint i = 0; i < _children.count; ++i) { |
| 351 auto tmp = _children[i]; | |
| 352 if(int result = dg(i, tmp)) | |
| 353 return result; | |
| 354 } | |
| 355 return 0; | |
| 356 } | |
| 357 } | |
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358 unittest { |
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359 auto i = 0; |
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360 auto container = new Panel; |
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361 container.descendantAdded += (HierarchyEventArgs e) { i++; }; |
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362 auto sub = new Panel; |
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363 sub.add(new Control); |
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364 container.add(sub); |
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365 assert(i == 2); |
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366 } |
| 0 | 367 |
| 368 // TODO: calling panel.children.add(button) will cause a crash | |
| 369 // because the button's parent is not set to the panel | |
| 370 // need to add a change handler on children? | |
| 371 class Panel : Container { | |
| 372 ControlList children() { return _children; } | |
| 373 void add(Control child) { super.add(child); }; | |
| 374 void remove(Control child) { super.remove(child); }; | |
| 375 int opApply(int delegate(inout Control item) dg) { | |
| 376 return super.opApply(dg); | |
| 377 } | |
| 378 int opApply(int delegate(inout uint index, inout Control item) dg) { | |
| 379 return super.opApply(dg); | |
| 380 } | |
| 381 // override protected void whenPainting() { | |
| 382 // } | |
| 383 } | |
| 384 |