Controls

In the Symbian OS UI Control Framework, all UI elements (with a few exceptions) are controls. A control is a rectangular area of the screen that may respond to user input events. Buttons, menus, text input boxes and application views displaying application-specific data are all examples of controls.

All controls are implemented by deriving from the CCoeControl class. Concrete implementations of controls are provided by a user interface library (such as Uikon), or by the application programmer. The control framework itself provides no concrete controls.

Window-owning controls and non-window-owning controls

Simple controls and compound controls

The run-time control hierarchy

The control environment

Control observers

Control contexts

Object provider mechanism

Text and Zooming

Layout Management