Gtk.Widget.compute_transform

### Method

# Gtk Widgetcompute_transform

#### Declaration [src]

    gboolean
    gtk_widget_compute_transform (
      GtkWidget* widget,
      GtkWidget* target,
      graphene_matrix_t* out_transform
    )

#### Description [src]

Computes a matrix suitable to describe a transformation from `widget`‘s coordinate system into `target`‘s coordinate system.

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

#### Parameters

`target` | `GtkWidget`
| The target widget that the matrix will transform to.
| The data is owned by the caller of the function.
`out_transform` | `graphene_matrix_t`
| Location to store the final transformation.
| The argument will be set by the function.
| The data is owned by the caller of the function.

#### Return value

Returns: | `gboolean`
| `TRUE` if the transform could be computed, `FALSE` otherwise.