JulienB: /* Launching your Qt application */

2016-11-03T15:13:49Z

‎Launching your Qt application

SebastienSz: /* Launching you Qt application */

2016-10-26T12:01:45Z

‎Launching you Qt application

SebastienSz: Created page with "= Introduction = This page will summarize the process to build, install and use Qt on your APF board. It will focus on Qt5. = Compiling Qt = Select Qt5 from the BuildRoot m..."

2016-10-26T09:45:50Z

Created page with "= Introduction = This page will summarize the process to build, install and use Qt on your APF board. It will focus on Qt5. = Compiling Qt = Select Qt5 from the BuildRoot m..."

New page

= Introduction =

This page will summarize the process to build, install and use Qt on your APF board. It will focus on Qt5.

= Compiling Qt =

Select Qt5 from the BuildRoot menuconfig
<pre class="config">
Target packages --->
Graphic libraries and applications (graphic/text) --->
[*] Qt5 --->
</pre>

Under the Qt5 submenu, you can select the features and Qt modules you need. The most important ones are described below.

Select the following option to accept de free license of Qt. If you don't select the option here, the building of Qt will stop and ask you to accept it.
<pre class="config">
[*] Approve free license
</pre>

To dispaly UI you will need the gui module and the widgets module. You need to select de graphical platform you want. For example linuxfb for the framebuffer. You can also set the default graphical platform here instead of passing to your Qt application with the -platform parameter.
<pre class="config">
[*] gui module
[*] widgets module
-*- linuxfb support
...
(linuxfb) Default graphical platform
</pre>

To support the touchscreen, enable Tslib support.
<pre class="config">
[*] Enable Tslib support
</pre>

You can then select the Qt modules you need. For example:

* '''qt5xmlpatterns''' if you need to read or write XML files.
* '''qt5serialport''' if you need to use UARTs from you Qt application

= Compiling your Qt application =

Once Qt is compiled, you need to compile and deploy your application. You can do this from Qt Creator. You need to create a "Kit" for your APF board. See the Qt Creator [http://doc.qt.io/qtcreator/index.html documentation] You will need the following informations:
* The debugger path is '''buildroot/output/host/usr/bin/arm-linux-gnueabihf-gdb'''
* The compiler path is '''buildroot/output/host/usr/bin/arm-linux-gnueabihf-g++'''
* The qmake paths is '''buildroot/output/host/usr/bin/qmake'''

= Launching you Qt application =
If you want to use the tslib you need to active it first
<pre class="apf">
export QT_QPA_FB_TSLIB=1 # for the framebuffer backend
export QT_QPA_EGLFS_TSLIB=1 # for openGL backend
</pre>

and specify the input device

<pre class="apf">
export TSLIB_TSDEVICE=/dev/input/event0
</pre>

<pre class="apf">
# ./flightinfo -plaform linuxfb
</pre>

The Qt Embedded [http://doc.qt.io/qt-5.6/embedded-linux.html documentation] describes all the options you can pass to the Qt framework.

@@ Line 59: / Line 59: @@
 <pre class="apf">
-# ./flightinfo -plaform linuxfb
+# /usr/lib/qt/examples/widgets/widgets/tetrix/tetrix -plaform linuxfb
 </pre>
 The Qt Embedded [http://doc.qt.io/qt-5.6/embedded-linux.html documentation] describes all the options you can pass to the Qt framework.

@@ Line 45: / Line 45: @@
 * The qmake paths is '''buildroot/output/host/usr/bin/qmake'''
-= Launching you Qt application =
+= Launching your Qt application =
 If you want to use the tslib you need to active it first
 <pre class="apf">

Qt - Revision history

JulienB: /* Launching your Qt application */

SebastienSz: /* Launching you Qt application */

SebastienSz: Created page with "= Introduction = This page will summarize the process to build, install and use Qt on your APF board. It will focus on Qt5. = Compiling Qt = Select Qt5 from the BuildRoot m..."