January 2003
Intermediate to advanced
896 pages
19h 58m
English
book
Microsoft® .NET Compact Framework (Core Reference)
by Andy Wigley, Stephen Wheelwright, Robert Burbidge, Rory MacLoed, Mark Sutton
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The OnPaint Method
The OnPaint method for a form or a control is called by the operating system whenever part or all of that form or control is obscured by another form or control and needs to be redrawn. A Graphics object is passed as part of the PaintEventArgs parameter for the OnPaint method. Using this Graphics object, you redraw the portion of the display that has been obscured. You use the ClipRectangle property, which defines a Rectangle structure that represents the area of the display that has been obscured, to test whether you need to redraw your graphics. Testing the ClipRectangle before redrawing your graphics reduces unnecessary processing of commands.
Note
Note that the Paint event handler for a form or a control, such as Form1_Paint ...
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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.