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comparison mde/gui/widget/AChildWidget.d @ 174:3d58adc17d20

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author Diggory Hardy <diggory.hardy@gmail.com>
date Mon, 31 Aug 2009 13:54:23 +0200
parents 0dd49f333189
children 1cbde9807293
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173:a1ba9157510e 174:3d58adc17d20
37 * An abstract base widget class for IChildWidgets. 37 * An abstract base widget class for IChildWidgets.
38 * 38 *
39 * This abstract class, and the more concrete FixedWidget and ScalableWidget 39 * This abstract class, and the more concrete FixedWidget and ScalableWidget
40 * classes provides useful basic implementations for widgets. 40 * classes provides useful basic implementations for widgets.
41 *****************************************************************************/ 41 *****************************************************************************/
42 abstract class AChildWidget : IChildWidget 42 abstract class AChildWidget : IChildWidget, IWidget
43 { 43 {
44 //BEGIN Load and save 44 //BEGIN Load and save
45 // Base this() for child Widgets. 45 // Base this() for child Widgets.
46 protected this (IWidgetManager mgr, IParentWidget parent, widgetID id) { 46 protected this (IWidgetManager mgr, IParentWidget parent, widgetID id) {
47 this.mgr = mgr; 47 this.mgr = mgr;
53 override bool setup (uint n,uint) { 53 override bool setup (uint n,uint) {
54 return n == 0; 54 return n == 0;
55 } 55 }
56 56
57 // Don't save any data: fine for many widgets. 57 // Don't save any data: fine for many widgets.
58 override bool saveChanges () { 58 public override bool saveChanges () {
59 return false; 59 return false;
60 } 60 }
61 61
62 // Widgets with content need to override these 62 // Widgets with content need to override these
63 override IContent content () { 63 override IContent content () {
131 override int clickEvent (wdabs cx, wdabs cy, ubyte b, bool state) { 131 override int clickEvent (wdabs cx, wdabs cy, ubyte b, bool state) {
132 return 0; 132 return 0;
133 } 133 }
134 134
135 /* Dummy functions; many widgets don't need to respond to dragging. */ 135 /* Dummy functions; many widgets don't need to respond to dragging. */
136 void dragMotion (wdabs cx, wdabs cy, IChildWidget) {} 136 override void dragMotion (wdabs cx, wdabs cy, IChildWidget) {}
137 bool dragRelease (wdabs cx, wdabs cy, IChildWidget) { 137 override bool dragRelease (wdabs cx, wdabs cy, IChildWidget) {
138 return false; // any widgets not handling events should let them be passed as normal to clickEvent 138 return false; // any widgets not handling events should let them be passed as normal to clickEvent
139 } 139 }
140 140
141 /* Dummy functions: suitable for widgets with no text input. */ 141 /* Dummy functions: suitable for widgets with no text input. */
142 override void keyEvent (ushort, char[]) {} 142 public override void keyEvent (ushort, char[]) {}
143 override void keyFocusLost () {} 143 public override void keyFocusLost () {}
144 144
145 // Called when mouse moves over or off this 145 // Called when mouse moves over or off this
146 override void underMouse (bool state) {} 146 override void underMouse (bool state) {}
147 147
148 override bool dropContent (IContent content) { 148 public override bool dropContent (IContent content) {
149 return parent.dropContent (content); 149 return parent.dropContent (content);
150 } 150 }
151 151
152 // Only useful to widgets creating popups. 152 // Only useful to widgets creating popups.
153 override void popupClose () {} 153 protected override void popupClose () {}
154 override bool popupParentClick () { 154 protected override bool popupParentClick () {
155 return true; 155 return true;
156 } 156 }
157 //END Events 157 //END Events
158 158
159 /* Basic draw method: draw the background (all widgets should do this). */ 159 /* Basic draw method: draw the background (all widgets should do this). */
160 override void draw () { 160 public override void draw () {
161 //TODO: possibly enforce all widgets to implement this so their invariant runs:
162 //assert (false, "all widgets should override draw");
161 mgr.renderer.drawWidgetBack (x,y, w,h); 163 mgr.renderer.drawWidgetBack (x,y, w,h);
162 } 164 }
163 165
164 // Debug function to print size info. Intended to be correct not optimal. 166 // Debug function to print size info. Intended to be correct not optimal.
165 debug override void logWidgetSize () { 167 debug public override void logWidgetSize () {
166 logger.trace ("size: {,4},{,4}; minimal: {,4},{,4}; sizable: {},{} - {,-50} {}", this.width, this.height, this.minWidth, this.minHeight, cast(int)this.isWSizable, cast(int)this.isHSizable, this, id); 168 logger.trace ("size: {,4},{,4}; minimal: {,4},{,4}; sizable: {},{} - {,-50} {}", this.width, this.height, this.minWidth, this.minHeight, cast(int)this.isWSizable, cast(int)this.isHSizable, this, id);
167 } 169 }
168 170
169 protected: 171 protected:
170 /************************************************************************** 172 /**************************************************************************
209 * mgr.requestRedraw could be hooked in directly if the prototype changed. */ 211 * mgr.requestRedraw could be hooked in directly if the prototype changed. */
210 void contentRedraw (IContent) { 212 void contentRedraw (IContent) {
211 mgr.requestRedraw; 213 mgr.requestRedraw;
212 } 214 }
213 215
216 invariant {
217 assert (w >= mw);
218 assert (h >= mh);
219 }
220
214 IWidgetManager mgr; // the enclosing window 221 IWidgetManager mgr; // the enclosing window
215 IParentWidget parent; // the parent widget 222 IParentWidget parent; // the parent widget
216 wdim x, y; // position 223 wdim x, y; // position
217 widgetID id; // The widget's ID, used for saving data 224 widgetID id; // The widget's ID, used for saving data
218 wdim w, h; // size 225 wdim w, h; // size
307 if (oldPushed != pushed) 314 if (oldPushed != pushed)
308 mgr.requestRedraw; 315 mgr.requestRedraw;
309 } 316 }
310 317
311 /// The action triggered when the button is clicked... 318 /// The action triggered when the button is clicked...
312 void activated (); 319 abstract void activated ();
313 320
314 protected: 321 protected:
315 bool pushed = false; /// True if button is pushed in (visually) 322 bool pushed = false; /// True if button is pushed in (visually)
316 IPopupParentWidget parentIPPW; 323 IPopupParentWidget parentIPPW;
317 } 324 }