[Workspaces] Draw issues with multiple replicants.

[mpanasyuk]

How to reproduce:

1) Open Workspaces. 2) Create two replicants on Desktop. 3) Delete the first created replicant.

The Desktop area it was located at now redraws incorrectly (deleted replicant is still drawn, moving any object like window over this area will cause visual artifacts).

Close the second replicant and this visual anomaly dissapears (area will be redrawn correctly next time you'll move a window or something over it).

Case #2:

1) Open Workspaces. 2) Create one replicant on Desktop. 3) Close Workspaces. 4) Clone replicant (create yet another from the first one).

Close the first replicant. The area it was located at still not redrawn (replicant still visible) but will be redrawn correctly next time you'll move a window or something over it.

Haiku R1/alpha1 (Revision 32975)

[axeld]

I just talked with Stippi, and his assumption was right: the cause for this is indeed the way Workspaces disables the drawing region of its B_DRAW_ON_CHILDREN parent. When this is disabled, everything works fine, but Workspaces starts to flicker.

This should be fixed on the app_server, and the hack in Workspaces removed. Assigning to stippi as he probably knows best how to fix the flickering.

[waddlesplash]

Never mind, that doesn't actually work. Workspaces still flickers if you force it to update too often... I'll have to find a different solution.

[diver]

Still here in hrev53693.