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

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Container control base class implementation CCoeControl::HandlePointerEvent() redirects
 
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.
+
events to its child controls. You have to remember implement event handling into every custom ui controls in your application.
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()
 
If you want that one ui control receives all pointer events, it can be done by CCoeControl::SetPointerCapture()

Revision as of 11:28, 14 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. You have to remember implement event handling into every custom 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

[S60 5th Solitaire Game Example]

[S60 5th ImageConverter Example]

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