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Tutorial: Dual Screen Display

Qtopia provides the QPhoneStatus class to enable easy access to phone status information.

Example Dual Screen Application

There is an example of a simple status display for a dual screen phone in src/tools/dualdisplaybasic. It illustrates the use of the phone status library and provides a small display, similar to a monochrome LCD display to display the state of the phone.

There are two options for display:

1. using one Qtopia Core display -

   the status display will appear as a floating display in the Qtopia display. This is the common case for a LCD display which does not need the complete Qtopia Core graphics engine to drive it. To view in this mode, simply run the application.

2. using a separate display -

   the status display appears in a separate framebuffer. This case is desirable on a larger, full color secondary display. To view the example in this mode create a separate framebuffer and start the application in this framebuffer.

   For example:

       qvfb -width 83 -height 46 -qwsdisplay :2
       ./dualdisplaybasic -qws -display :2

   Qtopia Core 4.2 will allow multiple displays to be controlled by a single server process. This will allow a greater degree of integration with the main display and applications with lower overhead.