CBA buttons

Figure 1. Application with Options and Exit softkeys in portrait and landscape views

The Symbian platform uses Control Button Area (CBA) resources to set the options in the control pane above the softkeys. CBA resources map the text that appears above the softkeys in the control pane with commands that are collected by the event loop of the application framework and delivered to your application for command handling.

When a mobile device user selects an Options softkey, the application framework displays the Options menu based upon the definitions in the menu bars resources.

Depending upon the requirements of your application, you can either:

• use precompiled CBA button options contained in avkon.hrh

• create your own buttons

CBA buttons are constructed using the Buttons API.

• Using precompiled CBA button resources
  
• Defining resources for your own CBA buttons