[BeagleBone Black] Image not appears in Tool Button

ChupetaGUI

Hi,

I've got this problem: When i compile my code on desktop, all my icons are displayed on my screen and
when i try to compile my code on my embedded system, no one of my icons appears.

I'm using an absolute path of the image, so the Tool Button loads the image properly when i'm on desktop. The same
doesn't works on my embbeded system.
I used the "Qt resources system" to store the images, but this method didn't work properly, for this reason i'm
using the absolute path.

So, i'm using the following setup:

QT Creator v2.5.2
Ubuntu 12.04 LTS
Final target: Beaglebone Black Qt v4.8.5
I'm using my personal buildroot system files, so my beaglebone doesn't have the original linux distribution Angstrom.
The support for gif, jpeg and png was enabled on buildroot.

More information:

The image was transfered to my beaglebone using ftp.
When the image gets transfered, i change the url to match the beaglebone file system.

i.e:

ON DESKTOP:
ui->myButton->setStyleSheet("QToolButton {image: url('/home/usr/Desktop/img/img.png');}") //it works

ON BEAGLEBONE BLACK:
ui->myButton->setStyleSheet("QToolButton {image: url('/home/img/img.png');}") // not working

To finish, i want to show the image using the absolute path just to ensure that the beaglebone can
load and show the images, and later i'll use the "Qt resources system" again.

Thanks for your support.

ChupetaGUI

Hi,
note: I got sucess in my tests with images on format .bmp

ChupetaGUI

but yet not works with png format

SGaist

Hi and welcome to devnet,

Unless you changed something on your configure command and IIRC png should be built-in. How did you configure your cross-compiled Qt ? Did you properly deploy all plugins ?

ChupetaGUI

Hi SGaist, tankyou for your reply,

I'm using buildroot to cross-compile the QT, so configure file is auto generated, and i enabled support to png, jpeg and gif in buildroot.
I uploaded the files for you see.

config.status >> https://www.dropbox.com/s/d4j1fa2hkpyn027/config.status
configure >> https://www.dropbox.com/s/f2azhflb8b2fpr6/configure

I do not understand. What is IIRC? is the .pro file?

SGaist

IIRC means If I Recall Correctly

You should write a little dummy program that dumps the supported image types on the console just to see if that part is working correctly.

ChupetaGUI

Yes, I've tested with a simple program and the same problem happened, only ".bmp" format is working, then I think the problem is some plugin or library that supports the png and jpeg formats.

One thing maybe help, I found some tutorials on internet teaching the following:

[.pro]
QTPLUGIN += qpng

[main]
QString sDir = QCoreApplication::applicationDirPath();
a.addLibraryPath(sDir+"/plugins/imageformats");
//in this case I copied the folder with libs to project directory

[mainwindow]
#include <QtPlugin>

Q_IMPORT_PLUGIN(qpng)

But got the error:
cannot find -lqpng
collect2: error: ld returned 1 exit status

SGaist

That's the technique you have to use if you built Qt statically.

You should run your program with QT_DEBUG_PLUGINS=1 to see what happens with the plugins