The "sync" event si sent to an invisible window when "repaint" would have been sent if the window would be visible. This gives the window a chance to advance its temporal state (state that depends on time, like animation state) even when it's not repainted.
Windows implementation done.
The "sync" event si sent to an invisible window when "repaint" would have been sent if the window would be visible. This gives the window a chance to advance its temporal state (state that depends on time, like animation state) even when it's not repainted.
Windows implementation done.