Gets the preferred width the this would like to be displayed at.
Consumers of this interface can use this to reserve enough space to draw the paintable.
This is a purely informational value and does not in any way limit the values that may be passed to [[email protected]].
If the this does not have a preferred width, it returns 0. Negative values are never returned.
| this |
a `GdkPaintable` |
|
the intrinsic width of this or 0 if none. |