710769 - PuppetWidget needs to dispatch WILL_PAINT events

Status: NEW

(Core :: Widget, defect)

Description

[Boris Zbarsky [:bzbarsky]]

See bug 598482 comment 79.

Chris, where should this actually live?

Comment 1

[Chris Jones [:cjones] inactive; ni?/f?/r? if you need me]

Very straightforward to add to PuppetWidget::DispatchPaintEvent().

It'd be great to centralize willpaint/didpaint dispatching, instead of having all the widget backends do it, but I'm not sure how that would work.

Comment 2

[Robert O'Callahan (:roc) (email my personal email if necessary)]

It's platform specific so that can't be done. WillPaint needs to be called at a time between the OS event arriving and NS_PAINT firing when it is safe to reconfigure widgets. DidPaint needs to be called between NS_PAINT firing and returning from the OS event when it's safe to reconfigure widgets. Depending on the platform, no such times may exist, and if such a time does exist it will be in widget code.