QT for Raspberry Pi: Display Issue
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wrote on 22 Jan 2018, 05:59 last edited by
Hello,
I'm developing an GUI application with QT on Raspberry Pi.
Below I have attached screenshot of Original GUI , through QT creator RUN command:
You can see Tags like Count, P.V. and S.V. and Time Stamp showing correctly.
But when I try to run this QT executable on Power ON, It shows like below:
In which Second is not showing Time Stamp and Tags also. Push Button pattern is also changed.
I have write this in /etc/profile, where QT_GPIO is QT executable.
"/home/pi/QT_GPIO/QT_GPIO &"Why I'm getting this difference in GUI???
QT creator: 3.2.1
QT 5.3.2 - GCC 4.9.2
Raspberry Pi have Raspbian Jessie version 8 -
Hello,
I'm developing an GUI application with QT on Raspberry Pi.
Below I have attached screenshot of Original GUI , through QT creator RUN command:
You can see Tags like Count, P.V. and S.V. and Time Stamp showing correctly.
But when I try to run this QT executable on Power ON, It shows like below:
In which Second is not showing Time Stamp and Tags also. Push Button pattern is also changed.
I have write this in /etc/profile, where QT_GPIO is QT executable.
"/home/pi/QT_GPIO/QT_GPIO &"Why I'm getting this difference in GUI???
QT creator: 3.2.1
QT 5.3.2 - GCC 4.9.2
Raspberry Pi have Raspbian Jessie version 8@Deep-Kapadia How do you position all the graphical elements? Do you use layouts or do you place them manually?
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@Deep-Kapadia How do you position all the graphical elements? Do you use layouts or do you place them manually?
wrote on 22 Jan 2018, 06:20 last edited by@jsulm I have placed them manually.
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@jsulm I have placed them manually.
@Deep-Kapadia That's the problem: if the theme changes you will have such issues. It is usually better to use layouts (http://doc.qt.io/qt-5/layout.html) - they take care to position all the elements in a correct way.
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@Deep-Kapadia That's the problem: if the theme changes you will have such issues. It is usually better to use layouts (http://doc.qt.io/qt-5/layout.html) - they take care to position all the elements in a correct way.
wrote on 22 Jan 2018, 06:54 last edited by@jsulm Thanks!!
Tags misplace issue solved by Layout.
But Push Button Pattern change issue still remains. You can see the difference in both screenshot Push Button background color an type is different. -
@jsulm Thanks!!
Tags misplace issue solved by Layout.
But Push Button Pattern change issue still remains. You can see the difference in both screenshot Push Button background color an type is different.@Deep-Kapadia Apparently you have two different themes depending on how you start your app. My guess is that you have two different Qt version on your device: one from the Raspbian and one which you installed by yourself?
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@Deep-Kapadia Apparently you have two different themes depending on how you start your app. My guess is that you have two different Qt version on your device: one from the Raspbian and one which you installed by yourself?
wrote on 22 Jan 2018, 12:12 last edited by@jsulm Okay... So is there any way to select a particular version to run QT executable?
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Hi,
To ensure it's that, you can use
LD_LIBRARY_PATHto ensure that the folder containing your custom version of Qt is searched first for dependencies resolution. -
Hi,
To ensure it's that, you can use
LD_LIBRARY_PATHto ensure that the folder containing your custom version of Qt is searched first for dependencies resolution.wrote on 26 Jan 2018, 11:21 last edited by@SGaist Thanks for your reply.
Can you please suggest an example how to use LD_LIBRARY_PATH? -
@SGaist Thanks for your reply.
Can you please suggest an example how to use LD_LIBRARY_PATH?LD_LIBRARY_PATH=/path/to/your/qt/libs:$LD_LIBRARY_PATH
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