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<concept id="GUID-48363190-6FFB-4230-84B4-2E521EA51365" xml:lang="en"><title>Using

menu sections in menu bar resource statements</title><prolog><metadata><keywords/></metadata></prolog><conbody>

<fig id="GUID-4EAE2293-314B-4FFB-BF37-FAF75DDC0135"><title>Menu sections in an Options menu</title><image href="GUID-F96D14A5-58BB-4F1A-A6FB-5D13DCB84B33_d0e91979_href.png"/></fig>

<p>The use of menu sections provides a means of combining menu bar resource

declarations in <b>Options</b> menus. One example of how this could be used

would be an application with two views. Three <parmname>MENU_BAR</parmname> resources

could be defined as follows:</p>

<ul>

<li><p>an application menu section, which would be common to both

views</p></li>

<li><p>a menu section for view 1, which would contain options items

unique to this view</p></li>

<li><p>a menu section for view 2, which would contain options items

unique to this view</p></li>

</ul>

<section id="GUID-84E33CCD-1D3D-4A79-BE71-FE96B3D61C22"><title>Combining menu

sections</title>

<p>The menu sections that are combined for an <b>Options</b> menu are defined

in the <parmname>MENU_BAR</parmname> resource. This resource lists all the

sections that will be combined to form the menu. The menu sections are combined

from bottom to top (for example, system sections such as 'Edit' go at the

bottom of the menu while context sections such as 'Open' go at the top of

the menu). A menu bar is defined as follows:</p>

<codeblock id="GUID-7E4BF634-13E9-4343-BB80-ACAFCF8D3A86" xml:space="preserve">

RESOURCE MENU_BAR r_menuapp_menu_bar

    {

    titles =

        {

        MENU_TITLE { menu_pane = r_system_menu; },

        MENU_TITLE { menu_pane = r_app_menu; },

        MENU_TITLE { menu_pane = r_view1_options_menu; },

        MENU_TITLE { menu_pane = r_context1_menu; }

        };

    }

</codeblock>

<p>The default <parmname>MENU_BAR</parmname> resource is declared in <xref href="GUID-23A60DE7-B72D-41BD-9F1E-882D31A7E3C7.dita"><parmname>EIK_APP_INFO</parmname></xref> or <xref href="GUID-B238952B-1691-49F4-B8B9-9F755011A7DD.dita"><parmname>AVKON_VIEW</parmname></xref></p>

</section>

<section id="GUID-4527D821-6960-4E18-B880-FC19BE5320F3"><title>Changing menu

sections</title>

<p>You can use the following method to change the <parmname>MENU_BAR</parmname> resource

that is used by the application to change the menu sections at any time within

the application: </p>

<codeblock id="GUID-17796D02-EF20-40EB-80C1-365B58FDC1C3" xml:space="preserve">iEikonEnv-&gt;AppUiFactory()-&gt;MenuBar()-&gt;

   SetMenuTitleResourceId(MENU_BAR_RESOURCE_ID);

</codeblock>

<p>This sets the whole menu bar and should be performed every time one

of the sections needs to change its contents. Therefore, you should define

as many <parmname>MENU_BAR</parmname> resources as there are possible combinations

of menu sections. That is, a menu bar should be defined for each combination

of view and context options. Note also that if view architecture is used,

and the view’s own menu system is in use, it is this menu bar’s contents that

need switching, as follows: </p>

<codeblock id="GUID-C2F22032-2AF7-41CB-872A-7388DDA23F94" xml:space="preserve">iMyView-&gt;MenuBar()-&gt;

     SetMenuTitleResourceId(MENU_BAR_RESOURCE_ID);

</codeblock>

</section>

<section id="GUID-73295F48-5E72-48E9-9F0E-5091A8C73B12"><title>Changing menu

items in menu sections</title>

<p>Individual menu items in a menu section may be changed whenever the

menu is displayed. This allows the application to show and hide (or remove

and add) menu items in response to the application state. In the <xref href="GUID-B5DE1C86-2B16-4B22-887F-7079E54A8ED6.dita">traditional

Symbian OS UI architecture</xref>, you should override <xref href="jar:GUID-35228542-8C95-4849-A73F-2B4F082F0C44.jar!/sdk/doc_source/reference/reference-cpp/UIKON/MEikAutoMenuObserverClass.html#%3a%3aMEikAutoMenuObserver%3a%3aDynInitMenuPaneL%28%29" format="application/java-archive"><parmname>MEikAutoMenuObserver::DynInitMenuPaneL()</parmname></xref> in the UI

controller. In the <xref href="GUID-68B999C2-0993-4804-9624-42C3D88BE5C7.dita">View

architecture</xref>, you should override <parmname>MEikAutoMenuObserver::DynInitMenuPaneL()</parmname> in

the view controller. An example of such an override is as follows:</p>

<codeblock id="GUID-D8991DA2-0FE2-4904-A202-8254EF294D50" xml:space="preserve">void CMyAppUi::DynInitMenuPaneL(TInt aResourceId, 

    CEikMenuPane* aMenuPane)

    {

    if(aResourceId != R_SYSTEM_MENU_PANE)

        return; // in this example only interest in system

                // pane

    // First hide all

    aMenuPane->SetItemDimmed(ECmdCut, ETrue);

    aMenuPane->SetItemDimmed(ECmdCopy, ETrue);

    aMenuPane->SetItemDimmed(ECmdPaste, ETrue);

    // Show according to application state

    if(...)

        {

        aMenuPane->SetItemDimmed(ECmdCut, EFalse);

        aMenuPane->SetItemDimmed(ECmdCopy, EFalse);    

        }

    else

        {

        aMenuPane->SetItemDimmed(ECmdPaste, EFalse);

        }

    } 

</codeblock>

<p>This method is called by the framework after each of the sections has

been added to the menu, and is called with the resource ID of the section

that has just been added and the menu pane object that is being built.</p>

<p>You can also override <xref href="jar:GUID-35228542-8C95-4849-A73F-2B4F082F0C44.jar!/sdk/doc_source/reference/reference-cpp/UIKON/MEikAutoMenuObserverClass.html#%3a%3aMEikAutoMenuObserver%3a%3aDynInitMenuBarL%28%29" format="application/java-archive"><parmname>MEikAutoMenuObserver::DynInitMenuBarL(TInt aResourceId, CEikMenuBar* aMenuBar)</parmname></xref> in

the <xref href="GUID-FD2CDEB8-0784-4BE5-A775-170F57D71BBC.dita#GUID-FD2CDEB8-0784-4BE5-A775-170F57D71BBC/GUID-FD2CDEB8-0784-4BE5-A775-170F57D71BBC">UI

controller</xref> or <xref href="GUID-DAC32BB9-C0EB-42FF-A596-C2F1A90A4BD7.dita#GUID-DAC32BB9-C0EB-42FF-A596-C2F1A90A4BD7/GUID-DAC32BB9-C0EB-42FF-A596-C2F1A90A4BD7">view

controller</xref>, depending on your UI architecture. This gets called before

any sections are added to the menu, and can be used to dynamically change

the sections that will be added to the menu. This could be used to change

the resource ID of the context menu section for a certain application state. </p>

</section>

</conbody></concept>