convert_widget_to_tree_coords
Description:
Converts widget coordinates to coordinates for the tree (the full scrollable area of the tree).
Note:
Use [class@Gtk.ListView] or [class@Gtk.ColumnView] instead
Parameters:
| this |
a `GtkTreeView` |
| wx |
X coordinate relative to the widget |
| wy |
Y coordinate relative to the widget |
| tx |
return location for tree X coordinate |
| ty |
return location for tree Y coordinate |