June 2003
Intermediate to advanced
960 pages
20h 55m
English
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Chapter 33. Scrollbars
This chapter describes the Tk scrollbar. Scrollbars have a general protocol that is used to attach them to one or more other widgets.
Scrollbars control other widgets through a standard protocol based around Tcl commands. A scrollbar uses a Tcl command to ask a widget to display part of its contents. The scrollable widget uses a Tcl command to tell the scrollbar what part of its contents are visible. The Tk widgets designed to work with scrollbars are: entry, listbox, text, and canvas. The scrollbar protocol is general enough to use with new widgets, or collections of widgets. This chapter explains the protocol between scrollbars and the widgets they control, but you don't need to know the details to use a scrollbar. All ...
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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.