QT embedded simulate (up,down,left,right,enter) navigation

BluTiGeS · wrote on 7 May 2015, 09:22

Hi,

i found in the net some hint using the configure switch -D QT_KEYPAD_NAVIGATION and set the nav mode QApplication::setNavigationMode.

But if i try that approach I get setNavigationMode is not a member if QApplication.
Is this in anymore? I am using latest QT 5.4 creator and cross compile to embedded with 4.8.6 qmake target.

Please help me, i am getting confused here. Since I think i am not the only one who just has keypad for navigation.

Regards

SGaist · wrote on 8 May 2015, 19:44

setNavigationMode is still there but requires QT_KEYPAD_NAVIGATION to be defined when when building Qt

BluTiGeS · 5 Aug 2015, 20:14

HI,

i have set this flag for my cross compiled qmake configuration QT4.8.6.
So how to configure qt creator QT5.4.1 to handle this QT_KEYPAD_NAVIGATION?

Do i need to configue the sources for my Ubuntu ?
like ./configure -v -D QT_KEYPAD_NAVIGATION
make -j 4
sudo make install

?

will it then be recognized, as QApplication function?

Maybe this picture helps to understand which my target platform is similar to:
http://emsystech.de/wp-content/uploads/2012/09/raspi-lcd-1.jpg

Is Qt able to get interaction with input fields/combo boxes etc. and menu navigations with only these 5 buttons?

SGaist · 5 Aug 2015, 20:28

Yes thats that but there's something puzzling me, why are you developing with Qt 5 on your desktop and run 4.8.6 on your device ?

BluTiGeS · wrote on 8 May 2015, 20:26

Well I just downloaded the latest QT total package and that had QT 5.4.1.

I need to use 4.8.6 as cross target because the target is not really running with qt 5.4.1 it gives DBUS errors etc.
So I wanted to start keeping the working 4.8.6 as a base to go on.

So maybe I can configure qt 5.4.1 with this KEYPAD define and keep the configured cross 4.8.6 qmake?
Are you seeing any issue with this?

Or what would you suggest to get qt running on such a platform:
http://emsystech.de/wp-content/uploads/2012/09/raspi-lcd-1.jpg

with navigation, iputs etc? Have you already done such a project?

SGaist · wrote on 8 May 2015, 20:36

I did, years ago and Qt wasn't even in it's 4 series

What exact errors are you getting with Qt 5 ?

In any case, if you have Qt 4 running properly, then use it also on your desktop to ensure you have the same behavior on both sides

BluTiGeS · wrote on 8 May 2015, 20:44

Okay thats sound good, maybe I need to give qt5 a second try or use also qt4 on the desktop.

I am not a the system right now but as I have in mind starting the application with

./test -qpa linuxFB:/dev/fb0

and then i got the DBUS error. Maybe my cmdline is also wrong. QT5 cross compile was not plug and play for me.

Do you remember how you have realized inputs with this few buttons?

SGaist · wrote on 8 May 2015, 20:59

The exact error messages would be useful. Just to rule out the obvious: do you have the dbus daemon running ?

The UI was written to be very keyboard friendly and had a lot thinking about focusing so as to make sense when moving from up to down and left to right. What kind of UI will that be ?

BluTiGeS · wrote on 11 May 2015, 06:17

Okay, seems to be DBUS not running correctly:

./TestQTCross -platform linuxfb:fb"/dev/fb0"

QIconvCodec::convertToUnicode: using Latin-1 for conversion, iconv_open failed
QIconvCodec::convertFromUnicode: using Latin-1 for conversion, iconv_open failed
process 2302: D-Bus library appears to be incorrectly set up; failed to read machine uuid: Failed to open "/var/lib/dbus/machine-id": No such file or directory
See the manual page for dbus-uuidgen to correct this issue.
D-Bus not built with -rdynamic so unable to print a backtrace
Aborted (core dumped)

is the DBUS really needed for qt5 embedded? since it is not in 4.8?

SGaist · wrote on 12 May 2015, 20:30

The DBus module is also included in the 4 series however AFAIK it should not be mandatory for the linuxfb plugin but you also have another problem with iconv_open. Are you using the same version of libraries on your target than the one used to build Qt 5 ?

BluTiGeS · wrote on 13 May 2015, 06:35

Hi,
yes i am using the same ones.

The configure command looks as follows:

./configure -release -opensource -confirm-license -arch arm -xplatform linux-arm-gnueabi-g++ -no-icu -no-pch -prefix /usr/local/Trolltech/qt5 -skip qtwebkit-examples -skip qtwebkit

I have adapted the qmake.conf of the linux-arm-gnueabi-g++ to fit my cross compile toolchain.

Do you see any issue?

SGaist · wrote on 13 May 2015, 22:43

which platform plugins are built ?

BluTiGeS · wrote on 14 May 2015, 09:40

It is build only for linuxfb platform.

SGaist · wrote on 16 May 2015, 20:40

How did you install Qt on your board ?

BluTiGeS · wrote on 17 May 2015, 12:52

I normally just move over the files of the given configure path /usr/local/Trolltech/qt5 to the target board into the same directory.

I found out if I use dbus-uuidgen -ensure before calling the app it starts up without the DBUS warning but the icon warning is still there.

Also I cannot configure qt to work with webkit (see different post).

Regards

SGaist · wrote on 17 May 2015, 20:20

Did you use your device root filesystem to cross-compile build Qt 5 ? If not, you have probably used a different set of library than the one that's being used on your board

BluTiGeS · wrote on 18 May 2015, 14:21

How can I use it?

I have just used the above written configure command.

SGaist · wrote on 18 May 2015, 20:04

Add -sysroot /path/to/your/mounted/device/filesytem to your configure options

BluTiGeS · wrote on 20 May 2015, 10:03

Thanks,

I have added it but now i get more and more errors.

So i changed back my config to following:
./configure -xplatform linux-arm-gnueabi-g++ -release -opensource -confirm-license -prefix /usr/local/Trolltech/qt5 -make libs -skip qtwebkit-examples -nomake tests -qt-zlib -qt-libpng -qt-libjpeg -qt-freetype -linuxfb -no-opengl -icu

Configure summary

Building on: linux-g++ (i386, CPU features: none detected)
Building for: linux-arm-gnueabi-g++ (arm, CPU features: neon)
Platform notes:

        - Also available for Linux: linux-kcc linux-icc linux-cxx

Build options:
Configuration .......... accessibility alsa audio-backend c++11 clock-gettime clock-monotonic compile_examples concurrent cross_compile dbus evdev eventfd freetype full-config getaddrinfo getifaddrs harfbuzz iconv icu inotify ipv6ifname large-config largefile linuxfb medium-config minimal-config mremap neon nis no-pkg-config openssl pcre png posix_fallocate precompile_header qpa qpa reduce_exports release rpath shared small-config xlib xrender zlib
Build parts ............ libs
Mode ................... release
Using C++11 ............ yes
Using gold linker....... no
Using PCH .............. yes
Target compiler supports:
Neon ................. yes

Qt modules and options:
Qt D-Bus ............... yes (loading dbus-1 at runtime)
Qt Concurrent .......... yes
Qt GUI ................. yes
Qt Widgets ............. yes
Large File ............. yes
QML debugging .......... yes
Use system proxies ..... no

Support enabled for:
Accessibility .......... yes
ALSA ................... yes
CUPS ................... no
Evdev .................. yes
FontConfig ............. no
FreeType ............... qt
Glib ................... no
GTK theme .............. no
HarfBuzz ............... yes (bundled copy)
Iconv .................. yes
ICU .................... yes
Image formats:
GIF .................. yes (plugin, using bundled copy)
JPEG ................. yes (plugin, using bundled copy)
PNG .................. yes (in QtGui, using bundled copy)
journald ............... no
mtdev .................. no
Networking:
getaddrinfo .......... yes
getifaddrs ........... yes
IPv6 ifname .......... yes
OpenSSL .............. yes (loading libraries at run-time)
NIS .................... yes
OpenGL / OpenVG:
EGL .................. no
OpenGL ............... no
OpenVG ............... no
PCRE ................... yes (bundled copy)
pkg-config ............. no
PulseAudio ............. no
QPA backends:
DirectFB ............. no
EGLFS ................ no
KMS .................. no
LinuxFB .............. yes
XCB .................. no
Session management ..... yes
SQL drivers:
DB2 .................. no
InterBase ............ no
MySQL ................ no
OCI .................. no
ODBC ................. no
PostgreSQL ........... yes (plugin)
SQLite 2 ............. yes (plugin)
SQLite ............... yes (plugin, using bundled copy)
TDS .................. no
udev ................... no
xkbcommon .............. no
zlib ................... yes (bundled copy)

But if I now do a make -j 4 I get an ICU warning, but ICU is needed for webkit, which I also need.

I../3rdparty/md4 -I../3rdparty/sha3 -I.moc -I../../mkspecs/linux-arm-gnueabi-g++ -o .obj/pcre16_compile.o ../3rdparty/pcre/pcre16_compile.c
tools/qtimezoneprivate_icu.cpp: In function ‘bool ucalOffsetsAtTime(void**, qint64, int*, int*)’:
tools/qtimezoneprivate_icu.cpp:145: error: ‘ucal_clone’ was not declared in this scope
tools/qtimezoneprivate_icu.cpp: In copy constructor ‘QIcuTimeZonePrivate::QIcuTimeZonePrivate(const QIcuTimeZonePrivate&)’:
tools/qtimezoneprivate_icu.cpp:285: error: ‘ucal_clone’ was not declared in this scope
tools/qtimezoneprivate_icu.cpp: In member function ‘virtual bool QIcuTimeZonePrivate::isDaylightTime(qint64) const’:
tools/qtimezoneprivate_icu.cpp:378: error: ‘ucal_clone’ was not declared in this scope
make[2]: *** [.obj/qtimezoneprivate_icu.o] Error 1
make[2]: *** Waiting for unfinished jobs....
make[2]: Leaving directory /home/qt/qt-everywhere-opensource-src-5.4.1/qtbase/src/corelib' make[1]: *** [sub-corelib-make_first] Error 2 make[1]: Leaving directory /home/qt/qt-everywhere-opensource-src-5.4.1/qtbase/src'
make: *** [sub-src-make_first] Error 2

EDIT:
I have updated the icu using the following Cross Tutorial
http://thebugfreeblog.blogspot.de/2013/05/cross-building-icu-for-applications-on.html

now I added the following to the configure :
-icu -I /opt/icuCrossFinal/include -L /opt/icuCrossFinal/lib

Now I got a bit further, I also needed a new linux-atomic version.

I keep you updated on webkit configure,

BluTiGeS · wrote on 21 May 2015, 06:52

Now I got the qtbase and webkit compiled, but If i want to start the app via

./app -qpa linuxfb:/dev/fb0 it says:

This application failed to start because it could not find or load the Qt platform plugin "xcb".

I checked the dependencies on my Ubuntu 11.04 and I found that Ubuntu is unalbe to locate :
Unable to locate package libxcb-icccm4
Unable to locate package libxcb-icccm4-dev

I then run the configure with -no-xcb and all worked well so far.

But now if I start the application :

./app -qpa linuxfb:fb=/dev/fb0

The screen is not using the full framebuffer (no fullscreen) it seems it is only using 2/3 of it an the rest is cut off.
With qt4 all works as expected.

Any idea why this happens?

Is xcb required for a webkit usage on linuxfb?