November 1999
Intermediate to advanced
832 pages
19h 28m
English
Content preview from Practical Programming in Tcl & Tk, Third EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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The Scrollbar Widget
Tk 8.0 uses native scrollbar widgets on Macintosh and Windows. While the use of scrollbars with other widgets is identical on all platforms, the interpretation of the attributes and the details of the bindings vary across platforms. This section describes the Tk scrollbar on UNIX. The default bindings and attributes are fine on all platforms, so the differences should not be important.
The scrollbar is made up of five components: arrow1, trough1, slider, trough2, and arrow2. The arrows are on either end, with arrow1 being the arrow to the left for horizontal scrollbars, or the arrow on top for vertical scrollbars. The slider represents the relative position of the information displayed in the associated widget, and the size ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.