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Revision as of 06:36, 14 June 2012 by hamishwillee (Talk | contribs)

Filtering standard Symbian shortcut key behavior

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Article Metadata
CompatibilityArticle
Created: User:Technical writer 2 (21 Sep 2006)
Last edited: hamishwillee (14 Jun 2012)

Overview

Filtering standard S60 shortcut key behavior

Description

Some key combinations in S60 have a standard predefined behavior. For example, in QWERTY-keyboard devices, CTRL+C /CTRL+V perform the function of copy/paste. Some applications may want to override this. The following solution demonstrates how an application can override the behavior of any shortcut key.

Solution

To override this functionality, you have to override the HandleWsEventL() function in the AppUi class (CEikAppUi). The overridden function should handle the required combinations, and pass all other key combinations to the framework by calling base class implementation of HandleWsEventL().
For example, filtering out all shortcuts using the Ctrl key could be done as follows:
void CMyAppUi::HandleWsEventL(
    const TWsEvent& aEvent,
    CCoeControl* aDestination)
    {
    if ((aEvent.Key()->iModifiers &
        (EModifierCtrl |
         EModifierLeftCtrl |
         EModifierRightCtrl)) != 0)
       {
        // Do nothing
       }
    else
      {
      CAknAppUi::HandleWsEventL(aEvent,aDestination);
      }
    }

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