Canvases
1. The canvas item types.
2. A simple 2-D plot.
3. Text items in canvases.
4. An editor for arrowheads on canvas lines.
5. A ruler with adjustable tab stops.
6. A building floor plan.
7. A simple scrollable canvas.
8. Tiles and transparent images.


##</code><code>##

perl -MTk -le " print Tk->findINC( shift ) "  demos/widget_lib/items.pl
perl -MTk -le " print Tk->findINC( shift ) "  demos/widget_lib/style.pl