Function

GdkWindowInvalidateHandlerFunc

Declaration

void
(* GdkWindowInvalidateHandlerFunc) (
  GdkWindow* window,
  cairo_region_t* region
)

Description [src]

Whenever some area of the window is invalidated (directly in the window or in a child window) this gets called with region in the coordinate space of window. You can use region to just keep track of the dirty region, or you can actually change region in case you are doing display tricks like showing a child in multiple places.

Available since:

3.10

Parameters

`window`	`GdkWindow`
	A `GdkWindow`.
	The data is owned by the caller of the function.
`region`	`cairo_region_t`
	A #cairo_region_t.
	The data is owned by the caller of the function.