unresolved external symbol "public: static struct QMetaObject const staticMetaObject"

jsulm

@a_coder Please also post mainw.h

jsulm

@a_coder Btw. it is not a good idea to have more than one QObject based class in one header file - this can cause problems with moc tool.

a_coder

@jsulm i detached it before and these are my files
mainw.h

#ifndef MAINW_H
#define MAINW_H

#include <qmainwindow.h>
#include "ui_mainw.h"
#include "control.h"

class Timer;
class control;

class Mainw : public QMainWindow {
	Q_OBJECT
public:
	void start();
	Mainw(Timer* time, QWidget* parent = nullptr);
	~Mainw();
signals:
	void change_gui();
private:
	Ui::Main* ui;
	Timer* timer;
private slots:
	void updatetime();
	void toworkspace() {
		ui->pushButton->setDisabled(true);
		emit change_gui();
		this->close();
	}
};
#endif // !MAINW_H

workspace.h

#ifndef WORKSPACE_H
#define WORKSPACE_H

#include <qprocess.h>
#include <qmainwindow.h>
#include "ui_workspace.h"
#include "control.h"

class Timer;

class Workspace : public QWidget {
	Q_OBJECT
public:
	Workspace(Timer* time, QWidget* parent = nullptr);
	~Workspace();
	void start();
signals:
	void change_gui();
private:
	//store all processes the ui run in a vector
	std::vector<QProcess*> processes;
	Ui::workspace* ui;
	Timer* timer;
private slots:
	void updatetime();
	void goback();
};

#endif // WORKSPACE_H

JonB

@jsulm said in unresolved external symbol "public: static struct QMetaObject const staticMetaObject":

more than one QObject based class in one header file

I don't want to derail this thread, but spoke to @Chris-Kawa a while ago and we both agree we have done this for years with no problems. Maybe we just don't do something "unusual/naughty/complicated".

jsulm

@a_coder said in unresolved external symbol "public: static struct QMetaObject const staticMetaObject":

#include "control.h"

class Timer;
class control;

You have a circular dependency: mainw.h includes control.h and control.h includes mainw.h. This is not going to work. Since you only use Timer* in mainw.h and already have a forward declaration for it, the control.h include is not needed, remove it.

a_coder

@jsulm it worked, thanks