I have a Qt project made by Qt creator.
I let the creator itself generate a private slots function fx. on_pushbutton_clicked().
This function is declared in header, the function itself is in the cpp file created by the Qt creator.
When I move the function from cpp file generated by Qt creator to another cpp file (it is added in the project, it has the same includes as the generated cpp.
When I try to compile it, I get lnk2019 error.
Is there any way to have slots functions in different files?
I am using VC compiler.
Okay, here is extract from the code. (it is quite long)
gui.h
#ifndef GUI_H
#define GUI_H
#include <QMainWindow>
#include "buffer.h"
#include <string>
#include <map>
#include <math.h>
#include <sstream>
#include <stdlib.h>
#include "qcustomplot.h"
#include <limits>
#include <time.h>
#include <random>
namespace Ui {
class GUI;
}
class GUI : public QMainWindow
{
Q_OBJECT
public:
explicit GUI(QWidget *parent = 0);
~GUI();
private slots:
void on_setall_clicked();
void on_integrace_button_clicked();
void on_elipsy_button_clicked();
void on_grafy_button_clicked();
private:
Ui::GUI *ui;
};
#endif // GUI_H
gui.cpp
#include "gui.h"
#include "ui_gui.h"
double drand(double from, double to){
double f = (double)rand()/RAND_MAX;
return from + f * (to - from);
}
GUI::GUI(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::GUI)
{
ui->setupUi(this);
srand(time(0));
}
GUI::~GUI()
{
delete ui;
}
void GUI::on_setall_clicked(){...};
void GUI::on_grafy_button_clicked(){...};
void GUI::on_integrace_button_clicked(){...};
elipsy.cpp
#include "gui.h"
void GUI::on_elipsy_button_clicked(){...};
GUI.pro
#-------------------------------------------------
#
# Project created by QtCreator 2013-03-27T09:01:31
#
#-------------------------------------------------
QT += core gui
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets printsupport
TARGET = GUI
TEMPLATE = app
SOURCES += main.cpp\
gui.cpp \
solve_rpn.cpp \
shunting_yard.cpp \
qcustomplot.cpp \
elipsy.cpp \
grafy.cpp \
integrace.cpp
HEADERS += gui.h \
buffer.h \
qcustomplot.h
FORMS += gui.ui
And the error code it gives me when i try to compile with the function elipsy_button_clicked() in file other than gui.cpp
moc_gui.obj:-1: Chyba:LNK2019: unresolved external symbol "private: void __cdecl GUI::on_elipsy_button_clicked(void)" (?on_elipsy_button_clicked@GUI@@AEAAXXZ) referenced in function "private: static void __cdecl GUI::qt_static_metacall(class QObject *,enum QMetaObject::Call,int,void * *)" (?qt_static_metacall@GUI@@CAXPEAVQObject@@W4Call@QMetaObject@@HPEAPEAX@Z)
debug\GUI.exe:-1: Chyba:LNK1120: 1 unresolved externals
Well, in case you need the entire sourcecode, I uploaded it
http://seed.gweana.eu/public/GUI.7z
FIXED: The file was ignored by the project, running qmake again solved the issue. Many thanks for the answers :)