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| -rw-r--r-- | doc/dw-interrupted-drawing.doc | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/doc/dw-interrupted-drawing.doc b/doc/dw-interrupted-drawing.doc index cb84ec8b..4da3b8c3 100644 --- a/doc/dw-interrupted-drawing.doc +++ b/doc/dw-interrupted-drawing.doc @@ -88,9 +88,19 @@ The exact control flow is described in this sequence diagram: When is drawing interrupted? ============================ -A widget holding references to widgets out of flow (which are not -necessary children) draws them as interruption if ... TODO. See -dw::oof::OOFAwareWidget::doesWidgetOOFInterruptDrawing. +A widget out of flow is regarded as part of the stacking context (see +\ref dw-stacking-context) of its *generator* (in the example above: +#fl-1 is part of the stacking context stablished by #sc-1, not the one +established by body). For this reason, a widget out of flow must, in +some cases, drawn while the *gerator* is drawn, as an +interruption. The exact rule: + +A widget out of flow must be drawn as an interruption (while the +*generator* is drawn) if the stacking context of the generator (to +which this widget belongs) is in front of the stacking context of the +container (the parent widget). + +See dw::oof::OOFAwareWidget::doesWidgetOOFInterruptDrawing. How does interruption of drawing work? |