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Pointer capturing in Symbian C++ on touch-enabled devices

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|'''Platform''' || S60 5th Edition
 
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|'''Tested on devices''' || Nokia 5800 XpressMusic
 
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|'''Category''' || Symbian C++
 
|'''Category''' || Symbian C++

Revision as of 12:41, 9 October 2008


ID   Creation date September 29, 2008
Platform S60 5th Edition Tested on devices Nokia 5800 XpressMusic
Category Symbian C++ Subcategory Touch UI


Keywords (APIs, classes, methods, functions): CCoeControl::SetPointerCapture()

Overview

S60 5th Edition supports touch events. Pointer events are sended to the active ui application container control if pointer/stylus is on the application.

Container control base class implementation CCoeControl::HandlePointerEvent() redirects events to its child controls. Child control receives events if its borders (TRect) are inside pointer event. You have to remember implement event handling CCoeControl::HandlePointerEvent() into every ui controls in your application.

If you want that one ui control receives all pointer events, it can be done by CCoeControl::SetPointerCapture()

MMP file

The following libraries are required:

LIBRARY cone.lib

Source file

void CMyContainer::EatAllEvents()
{
// This start eating all pointer events from other ui control in this application.
SetPointerCapture(ETrue);
}
void CMyContainer::ReleaseEventCatching()
{
// Disables pointer capturing
SetPointerCapture(EFalse);
}


Postconditions

On ui contol receives all touch events.

See also

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