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