After some research I found a solution for this error that has happened to a fiew fellow programmers:
#include <QtCharts/QChartView>
class A {
class MyQObject: public QtCharts::QChartView {
Q_OBJECT
...
};
...
};
this code can't be compiled, the moc struggles to understand the Q_OBJECT label in the nested class.
However this works when the class is not nested:
#include <QtCharts/QChartView>
class MyQObject: public QtCharts::QChartView {
Q_OBJECT
...
};
Does anyone know if this is the only way to make this work? I really wanted my object to be encapsulated and in the namespace of the class A...
edit:
I have tried to create an instance of the class MyQObject from the second example, I only tried to compile the code before and it compiled. The same issue presents itself when an instance of the class with the Q_OBJECT label is created in my code. That brings me to my problem, I can't get this to work, I am using vscode and cMake for this project, the Qt library is linked correctly and I used the following commands in my CMakeLists.txt:
set(CMAKE_AUTOUIC ON)
set(CMAKE_AUTORCC ON)
set(CMAKE_AUTOMOC ON)
I tried clean compiling the code but the Q_OBJECT label just does not seem to work.
edit 2: Here is a more elaborate example:
#include <QtCharts/QChartView>
#include <QMainWindow>
#include <iostream>
class A: public QMainWindow {
public:
/*******FINE CLASS B******************/
class B: public QtCharts::QChartView {
public:
B() { std::cout << "I do work\n"; }
};
/*****PROBLEMATIC CLASS C*************/
class C: public QtCharts::QChartView {
Q_OBJECT
public:
C() { std::cout << "I do not work\n"; }
};
/****A CONSTRUCTOR**************/
A() { std::cout << "I work\n"; }
};
edit: @igorTandetnik I can't even use this header:
#ifndef HEADER_HPP
#define HEADER_HPP
#include <QMainWindow>
class A: public QMainWindow {
Q_OBJECT
};
#endif//HEADER_HPP
At this point I might as well tell you what I was trying to achieve: I wanted to create a graph widget in my main window and resize it, hopefully calling a function to correctly size the object of the resized graph.
I thought I could do that with the connect function, but as far as I understood, I need this Q_OBJECT label to use signals and slots...
