X coordinate in child's coordinate system
Y coordinate in child's coordinate system
return location for X coordinate in parent's coordinate system, or NULL. out[allow-none]
return location for Y coordinate in parent's coordinate system, or NULL. out[allow-none]
Transforms window coordinates from a child window to its parent window, where the parent window is the normal parent as returned by gdk_window_get_parent() for normal windows, and the window's embedder as returned by gdk_offscreen_window_get_embedder() for offscreen windows. For normal windows, calling this function is equivalent to adding the return values of gdk_window_get_position() to the child coordinates. For offscreen windows however (which can be arbitrarily transformed), this function calls the GdkWindow::to-embedder: signal to translate the coordinates. You should always use this function when writing generic code that walks up a window hierarchy. See also: gdk_window_coords_from_parent() Since 2.22