Changes between Version 9 and Version 10 of CanvasClasses

Timestamp:

09/24/11 22:23:17 (20 months ago)

Author:

ian

Comment:

--

CanvasClasses

@@ -14 +14 @@
  * remove the nested CompositeCanvas tree that is created and replace it with a single Layout for the whole screen
    * reuse the "shards" concept in CompositeCanvas and described below
- * allow containers to advertise when they might be affected by their childrens':
+ * allow containers to subscribe to their childrens':
    * size changes (immediate child only)
    * pop-up definitions
@@ -24 +24 @@
  * allow widgets (via render() or layout()) to send that information up to interested containers
 
+Changes to the rendering process, possibly new render.py module
+
+ * layout is calculated iteratively building a flat Layout corresponding to the complete screen
+   1. call layout() on each widget that is visible, possibly finding more widgets
+   2. track and connect subscriptions from parent to children
+   3. repeat until no more widgets with layout() are remaining
+   4. build a flat cview-style representation of the remaining (non-container) widgets, with a dict of widgets and the positions they occupy in the cview (maybe just col,row,w,h) and their depths
+   5. render each non-container widget
 
 = Current status (1.0) =