Method

GdkDeviceget_surface_at_position

Declaration [src] 

GdkSurface*
gdk_device_get_surface_at_position (
  GdkDevice* device,
  double* win_x,
  double* win_y
)

Description [src]

Obtains the surface underneath device, returning the location of the device in win_x and win_y.

Returns NULL if the surface tree under device is not known to GDK (for example, belongs to another application).

Parameters

win_x double*
 

Return location for the X coordinate of the device location relative to the surface origin.
 The argument will be set by the function.
 The argument can be NULL.
win_y double*
 

Return location for the Y coordinate of the device location relative to the surface origin.
 The argument will be set by the function.
 The argument can be NULL.

Return value

Returns: GdkSurface
 

The GdkSurface under the device position.
 The data is owned by the instance.
 The return value can be NULL.