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<!DOCTYPE concept

  PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">

<concept id="GUID-8F2D8656-B7F4-4BDA-81CB-8440A2FDDD82" xml:lang="en"><title>Dimming

or hiding toolbar extension items</title><prolog><metadata><keywords/></metadata></prolog><conbody>

<p>You can dim or hide toolbar extension items if an extension item function

is not available in certain cases.</p>

<p>The example below shows how to set the extension button unavailable. In

the example, the boolean parameter <codeph>aHide</codeph> indicates if the

button should be hidden or dimmed.</p>

<codeblock xml:space="preserve">void CMyAppView::SetExtensionButtonUnavailableL( TBool aHide )

    {

    CAknToolbar* toolbar = Toolbar();

    if ( toolbar )

        {

        CAknToolbarExtension* toolbarExtension = toolbar->ToolbarExtension();

        if ( toolbarExtension )

            {

            if ( aHide )

                {

                // To show the item again: 

                // toolbar->HideItem( KExtensionButtonId, EFalse );

                toolbarExtension->HideItemL( KExtensionButtonId, ETrue );

                }

            else

                {

                // To undim the item again:

                // toolbar->SetItemDimmed( KExtensionButtonId, EFalse );

                toolbarExtension->SetItemDimmed( KExtensionButtonId, ETrue );

                }

            }

        }

    }

</codeblock>