In Windows Phone 7 Silverlight, is there a way to design a custom control from scratch - i. e. with custom drawing and custom touch processing? What do I subclass for that?
asked Mar 9, 2011 at 1:40
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2 Answers
Yes you can. You usually subclass Control, ItemsControl, or ContentControl. Here is a blog post that explains the process in detail: Creating a WP7 Custom Control in 7 Steps
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Neither drawing nor touch processing in that example... Just a combination of primitives. Commented Mar 9, 2011 at 2:02
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I'm not sure what you mean by drawing, almost all controls are simply collections of primitives built into a more interesting control. In terms of touch processing the Control class has the Manipulation events for you to hook into touch events. Commented Mar 9, 2011 at 2:34
As mentioned, you can create a custom control from scratch by deriving from the Control class. To implement gesture handling you can use the GestureService from the Silverlight Toolkit for WIndows Phone 7 or you can directly handle the ManipulationStarted, ManipulationDelta, and ManipulationCompleted UIElement events.
Jeff Prosise has a great series of four posts that cover touch manipulation in great detail:
For the "custom drawing" part, what did you have in mind? If a control built up from primitives isn't what you had in mind, what about lines and shapes?
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Lines and shapes on the XAML level... An old joke about XML comes to mind. Here goes: <bitmap><row><pixel red="100" blue="200" green="0"/></row></bitmap> Commented Mar 9, 2011 at 15:51