| 摘要 |
In a Java(TM) environment, a virtual keyboard is provided which is platform independent and which operates without modification to the Java(TM) applications with which it interacts. The virtual keyboard is integral to an embedded desktop which communicates between the Java(TM) Virtual Machine and any Java(TM) applications running on the system. The virtual keyboard comprises a simulated keyboard which is presented to a user on a touch screen and a virtual keyboard manager. The virtual keyboard manager acts as a focus listener for all components generated by the user interface of the applications running on the system. As a user engages components, focus events are tracked by the virtual keyboard manager, so that that the simulated keyboard will always reference the component selected by the user. The virtual keyboard manager also acts as a container listener, adding and removing containers (and their children) as applications are opened and closed or as the user interface of an application changes dynamically during use. The tracking of containers serves to facilitate garbage collection of Java(TM) objects. |
