compute_transform

Computes a matrix suitable to describe a transformation from this's coordinate system into target 's coordinate system.

The transform can not be computed in certain cases, for example when this and target do not share a common ancestor. In that case out_transform gets set to the identity matrix.

To learn more about widget coordinate systems, see the coordinate system [overview](coordinates.html).

Parameters:

this	a `GtkWidget`
target	the target widget that the matrix will transform to
out_transform	location to store the final transformation

Returns:

true if the transform could be computed, false otherwise