12 <concept id="GUID-405F7AB8-0F0E-4171-95E6-3524D76917DE" xml:lang="en"><title>Handling

    12 <concept id="GUID-405F7AB8-0F0E-4171-95E6-3524D76917DE" xml:lang="en"><title>Handling stylus pop-up menu events and commands</title><prolog><metadata><keywords/></metadata></prolog><conbody>

    13 stylus pop-up menu events and commands</title><prolog><metadata><keywords/></metadata></prolog><conbody>

    13 <p>At the construction phase, <codeph>CAknStylusPopUpMenu</codeph> is given a <codeph>MEikMenuObserver</codeph> object, which is usually

    14 <p>At the construction phase, <codeph>CAknStylusPopUpMenu</codeph> is given

    14 a pointer to the application’s UI (<xref href="GUID-77329067-34D9-3698-B764-294535E660EB.dita"><apiname>CAknAppUi</apiname></xref>) or

    15 a <codeph>MEikMenuObserver</codeph> object, which is usually a pointer to

    15 another class that implements the interface. The stylus pop up menu

    16 the application’s UI (<xref href="jar:GUID-759FBC7F-5384-4487-8457-A8D4B76F6AA6.jar!/html/classCAknAppUi.html" format="application/java-archive"><codeph>CAknAppUi</codeph></xref>)

    16 will grab the stylus event when one of its items is tapped on and

    17 or another class that implements the interface. The stylus pop up menu will

    17 it will then report the item’s command ID to the menu observer. It

    18 grab the stylus event when one of its items is tapped on and it will then

    18 is then up to the application to handle the command in the implementation

    19 report the item’s command ID to the menu observer. It is then up to the application

    19 of <xref href="GUID-CDB32ABA-F567-395D-9A00-2AC518BD5F3B.dita#GUID-CDB32ABA-F567-395D-9A00-2AC518BD5F3B/GUID-5A200511-9E99-3E2F-8E1B-B4A724BD2704"><apiname>MEikMenuObserver::HandleCommandL()</apiname></xref>. </p>

    20 to handle the command in the implementation of <codeph>MEikMenuObserver::HandleCommandL()</codeph>. </p>

    20 <p>When an item is  tapped, the menu calls its observer's (<codeph>iMenuObserver</codeph>) <codeph>ProcessCommandL()</codeph> using:<codeblock xml:space="preserve">void ProcessCommandL(TInt aCommandId);</codeblock> where, <codeph>aCommandID</codeph> parameter is the command number recorded in 

    21 <p>When an item is  tapped, the menu calls its observer's (iMenuObserver)

    21 the resource file. You can also add it using <codeph>AddMenuItemL()</codeph> function as shown in the following code snippet:<codeblock xml:space="preserve">void AddMenuItemL( const TDesC&amp; aItem, const TInt aCommandId );</codeblock></p>

    22 ProcessCommandL. Typically the observer is application's AppUi. It is then

    22 <p>The following code snippet illustrates how to handle the command:<codeblock xml:space="preserve">switch( aCommandId )

    23 the observer's responsibility to handle the command appropriately. The observer

    23 		{

    24 is informed with KErrCancel if the menu is closed without making a selection.</p>

    24 		case StylusMenuCommand1:

    25 <p><draft-comment time="2008-05-15T15:38" translate="no">Add sample code on event and command

    25 			break;

    26 handling here.</draft-comment></p>

    26 		case StylusMenuCommand2:

    27 			break;

    28 		case StylusMenuCommand3:

    29 			break;

    30 		case StylusMenuCommand4:

    31 			break;

    32 		case KErrCancel:

    33 			break;

    34 		default:

    35 			break;

    36 		}

    37 </codeblock> </p>

    38 <p>Typically the observer is application's AppUi. It is then the observer's

    39 responsibility to handle the command appropriately. The observer is

    40 informed with <codeph>KErrCancel</codeph> if the menu is closed without

    41 making a selection.</p>

    42 <p>Use the <xref href="GUID-FB7D03CC-6FE6-3B2E-997F-A220A92BF5E8.dita#GUID-FB7D03CC-6FE6-3B2E-997F-A220A92BF5E8/GUID-100C0AE9-D134-3409-8620-7343033DF5BA"><apiname>CAknStylusPopUpMenu::HandleControlEventL()</apiname></xref> method to handle events that occur when user selects a menu item.</p>

    43 <codeblock xml:space="preserve"/>