Problem with QMain Window

Ewa Miazga

Hello,
I have a problem with qt project. I try to build project that was created in 2008, but I encounter a problem with QMainWindow I think, I have 11 errors, but I think that they all reffers to that one problem. Unfortunately, I don't know what can be wrong. Can you help me?

#ifndef _SERVICESCOMPONENT_H_
#define _SERVICESCOMPONENT_H_

#include <commons.h>
//#include <QtGui>
//#include <QtWidgets>
#include <QtWidgets/qwidget.h>
#include <QtCore/qmutex.h>
#include <QtWidgets/qtreeview.h>
#include <QtWidgets/qheaderview.h>
#include <QtWidgets/qtreewidget.h>
#include <map>
#include <set>
#include "DCSCmd.h"
//#include <QtWidgets/qmainwindow.h>
#include <QtCore/qobject.h>

class ServicesComponent : public QMainWindow
{
}

many of errors reffers to moc_[files] but I don't understand why

When I add #include <QtWidgets/qmainwindow.h> I get 700 errors, which every one of them is like unresolved external ...
But I had such include in other files, and there are no problem with it. In .pro file I added += widgets.
I don't have more idea what can help in my situation.
Thanks for all suggestions.

mrjj

Hi
Unless you are using a super old Qt then its just
#include <QMainWindow>

also, make SURE no moc__ files are in the project folder. They are generated and should live in the build folder.
If it find old moc__ files, odd stuff will happen :)

Ewa Miazga

@mrjj Hi,
I had the newest version of Qt, but I don't know why I can't #include <QMainWindow>, because for some reasons ' cannot open source faile "QMainWindow".'
I should remove all files moc__ .. cpp also? I find them in project in folder x64/release/moc.
In pre-build event -> command line is command that creates moc.exe MainWindow.h -o moc_MainWindow.cpp
moc.exe GuiUpdatingThread.h -o moc_GuiUpdatingThread.cpp

JoeCFD

if pro file is used, list its content here.

mrjj

@Ewa-Miazga said in Problem with QMain Window:

x64/release/moc.

This seems ok as not a project folder directly.
But it also seems non standard which means that the -pro file might be special.

Have you tried to go
File->New Project
alt text

then just Next, Next

Then you get a clean project with QMainWindow

Its just to see if that ones just works so we know if its this project somehow or something with the installation

SGaist

Hi,

Seeing the age of the project, you likely are missing QT += widgets in your .pro file.

Ewa Miazga

@SGaist I added it, but it changed nothing.

Ewa Miazga

@JoeCFD
in .pro file:
CONFIG += no_fixpath
QT += core uitools widgets

    DEFINES -= UNICODE _UNICODE

Ewa Miazga

@mrjj
It works.
I decided to copy all the files to new console application qt project in visual studio and now I have plenty of unexternal symbols...

SGaist

The suggestion is to create a Qt Widgets application so you ensure that it's properly configured to build using the widgets module.

Ewa Miazga

@SGaist I checked it. It works.