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The master application is +primarily responsible for managing top-level window regions, and +pointer and keyboard input. +<p> Any TQt/Embedded application can be a master application by +constructing the <a href="qapplication.html">TQApplication</a> object with the +<em>TQApplication::GuiServer</em> type, or by being run with the <em>-qws</em> +command line option. +<p> This document assumes you have the Linux framebuffer configured correctly +and no master process is running. If you do not have a working Linux +framebuffer you can use the +<a href="emb-qvfb.html">TQt/Embedded virtual framebuffer</a>, or you can +run TQt/Embedded as a <a href="emb-vnc.html">VNC server</a>. +<p> Change to a Linux console and select an example to run, e.g. <tt>examples/widgets</tt>. Make sure $QTDIR is set to the directory where you +installed TQt/Embedded and add the $QTDIR/lib directory to +$LD_LIBRARY_PATH, e.g.: +<pre> +export QTDIR=$HOME/qt-VERSION +export LD_LIBRARY_PATH=$QTDIR/lib:$LD_LIBRARY_PATH +</pre> + +<p> Run the application with the <em>-qws</em> option: +<p> <pre> +cd $QTDIR/examples/widgets +./widgets -qws +</pre> + +<p> You should see the <tt>widgets</tt> example appear. If your mouse doesn't +work correctly you must specify the type of mouse to use. You can +exit the master application at any time using +<b>Ctrl+Alt+Backspace</b>. +<p> If you wish to run additional applications you should run them as clients +i.e. without the <em>-qws</em> option. +<p> <h2> Displays +</h2> +<a name="1"></a><p> TQt/Embedded allows multiple displays to be used simultaneously by running +multiple TQt/Embedded master processes. This is achieved using the -display +command line parameter or the $TQWS_DISPLAY environment variable. +<p> The -display parameter's syntax is: +<pre> + [gfx driver][:driver specific options][:display number] +</pre> + +For example, if you want to use the mach64 driver on fb1 as display 2: +<pre> + $ ./launcher -display Mach64:/dev/fb1:2 +</pre> + +<p> To try this functionality you can do the following: +<ol type=1> +<li> Change to VC 1 (virtual console one) and run the launcher: +<p> <pre> + $ cd examples/launcher + $ ./launcher +</pre> + +<p> <li> Switch to VC 2 and run another one: +<p> <pre> + $ cd examples/launcher + $ ./launcher -display :1 +</pre> + +<p> Another launcher will be started. Start an application in this launcher. +<p> <li> Press <b>Ctrl+Alt+F1</b> - back to display 0. You can also start +additional applications on a particular display by specifying the +display id. Change to VC 3: +<p> <pre> + $ cd examples/widgets + $ ./widgets -display :1 +</pre> + +<p> will display the widgets example on dislpay :1 (VC 2). +</ol> +<p> Only the master process needs to specify the driver/device part +explicitly. The clients get the information they need from the master +when they connect. So once you have a master server running using a +particular driver, you can just use "client -display :n" to use +display n. +<p> <h2> Mouse Input +</h2> +<a name="2"></a><p> TQt/Embedded attempts to autodetect a mouse by default. The supported +protocols are MouseMan, Microsoft, IntelliMouse and +some other devices specific to certain hardware (e.g. Vr touch panel). +To specify the mouse to use set the <tt>$TQWS_MOUSE_PROTO</tt> environment +variable, e.g.: +<pre> +export TQWS_MOUSE_PROTO=IntelliMouse +</pre> + +<p> The mouse autodetection opens the serial devices and psaux which +may cause conflicts with other programs using those devices. If +this is the case then specify the mouse driver protocol and device +explicitly. +<p> <p>See also <a href="emb-pointer.html">TQt/Embedded Pointer Handling</a>. + +<p> +<!-- eof --> +<p><address><hr><div align=center> +<table width=100% cellspacing=0 border=0><tr> +<td>Copyright © 2007 +<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a> +<td align=right><div align=right>TQt 3.3.8</div> +</table></div></address></body> +</html> |