Running Qtopia Core Applications

Using Multiple Displays

Qtopia Core also allows multiple displays to be used simultaneously. There are two ways of achieving this: Either run multiple Qtopia Core server processes, or use Qtopia Core's ready-made Multi screen driver.

When running multiple server processes, the screen driver (and display number) must be specified for each process using the -display command line option or by setting the QWS_DISPLAY environment variable. For example:

 ./myfirstserverapplication -qws -display "transformed:rot90:1"
 ./mysecondserverapplication -qws -display "QVFb:2"

See the display management documentation for more details on how to specify a screen driver. Note that you must also specify the display (i.e., server process) when starting client applications:

 ./myclientapplication -display "QVFb:2"

There is no way of moving a client from one display to another when running multiple server processes. Using the Multi screen driver, on the other hand, applications can easiliy be moved between the various screens.

The Multi screen driver can be specified just like any other screen driver by using the -display command line option or by setting the QWS_DISPLAY environment variable. For example:

 ./myserverapplication -qws -display "Multi: QVFb:0
         QVFb:1:offset=0,0 VNC:offset=640,0 :2"

See the display management documentation for details regarding arguments.

 ./myapplication -fn helvetica

 ./myapplication -bg blue

 ./myapplication -btn green

 ./myapplication -fg 'dark blue'

 ./myapplication -name texteditapplication

 ./myapplication -title 'Text Edit'

 ./myapplication -geometry 300x200x50x50

 ./myapplication -decoration windows