#5468: Draw() can overtake FrameResized()
----------------------------------+----------------------------
Reporter: bonefish | Owner: axeld
Type: bug | Status: new
Priority: normal | Milestone: R1
Component: Kits/Interface Kit | Version: R1/Development
Resolution: | Keywords:
Blocked By: | Blocking:
Has a Patch: 0 | Platform: All
----------------------------------+----------------------------
Comment (by jscipione):
I'm afraid that this bug cannot be fixed without changing how messages
work unfortunately. There's no way for us to guarantee that a Draw() call
will happen after a FrameResized() call without implementing a
transaction. Most of the time it works but without a guarantee that
messages will arrive in a certain order there are race conditions that
pop-up now and then. This is a design flaw and was as much a problem on
BeOS as it is on Haiku fundamentally. I've also observed that sliders
sometimes don't send the message (or the receiver never get it.) For
example in Deskbar preferences when you click to change the slider value,
occasionally the icons don't resize and we end up in an invalid state.
This is not a fault of the Deskbar code but is a bug somewhere deeper in
the messaging system. I'm not sure if this bug is related to this one or
not.
--
Ticket URL: <https://dev.haiku-os.org/ticket/5468#comment:7>
Haiku <https://dev.haiku-os.org>
The Haiku operating system.