see - Make a portion of a widget visible.
See makes sure that a portion of a widget is visible in
its containing view; for instance, it will scroll a canvas or text
widget to ensure that the specified portion is in view. The following
options are supported:
- -rectangle list
- Specifies a list with four dist coordinates describing the left,
top, right, and bottom coordinates of the rectangular region, in
coordinates relative to the widget origin, of the area that should be made
visible.
- -point listP
- Specifies a list with two dist coordinates describing a point
within the widget that should be made visible by preference if the
entirety of the above-specified rectangle cannot be shown. Defaults to the
top left of the specified rectangle.
- -where
- If this option is given, see returns a list containing the left,
top, right and bottom coordinates of the currently visible portion
of pathName.
If neither the -rectangle or the -point options are given,
then the entire area of pathName will be made visible.