fatal error: QtGui/QApplication: No such file or directory

Question

I'm using Qt Creator, and this line is generated automatically by the Qt Creator:

#include <QtGui/QApplication>

But, why am I getting this message?

QtGui/QApplication: No such file or directory

@Exa. I have added this to my PATH: C:\Qt\2010.05\bin. And, when I go to: Tools ---> Options... ---> Qt4 in the Qt Creator in the Qt versions tab under Auto-detected it says Qt in PATH <not found>. What should I do in this case? — Simplicity
– Simplicity, Commented Apr 4, 2011 at 7:35
Those are the errors that I get: The Qt version is invalid: Could not determine the path to the binaries of the Qt installation, maybe the qmake path is wrong? & The qmake command "<not found>" was not found or is not executable. — Simplicity
– Simplicity, Commented Apr 4, 2011 at 8:08

eyllanesc · Accepted Answer · 2019-01-24 05:56:26Z

21

Depending on the Qt-version (5) QtGui was moved to QtWidgets; so it becomes

#include <QtWidgets/QApplication>

edited Jan 24, 2019 at 5:56

eyllanesc

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answered Dec 16, 2015 at 9:38

Miguel Rodriguez

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VeroLom · Accepted Answer · 2013-04-13 12:51:47Z

14

You can try to add 'declarative' to the Project file:

QT += gui declarative

then

#include <QApplication>

It helps me

answered Apr 13, 2013 at 12:51

VeroLom

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Bart · Accepted Answer · 2012-09-22 13:38:16Z

7

Issue solved.

I added this to PATH: C:\Qt\2010.05\qt\bin

Instead of: C:\Qt\2010.05\bin

As the latter didn't contain qmake.exe

edited Sep 22, 2012 at 13:38

Bart

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answered Apr 4, 2011 at 8:15

Simplicity

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Sachith Wickramaarachchi · Accepted Answer · 2019-01-24 05:45:08Z

5

This is a version problem.to fix,

you need to add QT += widgets in the .pro file
and run qmake
and also use #include <QApplication> instead of #include <QtGui/QApplication>

edited Jan 24, 2019 at 5:45

answered Oct 20, 2017 at 13:58

Sachith Wickramaarachchi

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NightFury · Accepted Answer · 2012-08-22 16:11:08Z

2

I had got same problem. From visual studio using Command Prompt(2010), I changed the path of prompt to where my Qt resides i.e. C:\Qt. There I set QTDIR environment variable.

c:\Qt> setx QTDIR C:\Qt

Then message was displayed:

SUCCESS: Specified value was saved.

Make sure VS is closed during this. When you reopen it, all headers will be detected.

I hope my solution will help anyone someday. Cheers :)

answered Aug 22, 2012 at 16:11

NightFury

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