Qt connect between two classes not working - c++

Question

I have two classes: HoodPlanner and DrawRoad. Both classes inherit from QWidget and the the UI so I can access all UI elements in both classes.
Here's a snipped of both classes:
HoodPlanner:
#ifndef HOODPLANNER_H
#define HOODPLANNER_H
#include <ui_hoodplanner.h>
#include "drawroad.h"
#include <QtWidgets>
class HoodPlanner : public QWidget, private Ui::HoodPlanner
{
Q_OBJECT
private:
// (...)
public:
explicit HoodPlanner(QWidget * = 0);
// (...)
private slots:
// (...)
};
#endif // HOODPLANNER_H
DrawRoad:
#ifndef DRAWROAD_H
#define DRAWROAD_H
#include <ui_hoodplanner.h>
#include <QtWidgets>
class DrawRoad : public QWidget, private Ui::HoodPlanner
{
Q_OBJECT
private:
// (...)
public:
explicit DrawRoad(QWidget *parent = 0);
public slots:
void drawSC4Street();
};
#endif // DRAWROAD_H
In HoodPlanner I have a connect that will be emitted whenever the itemSelection changes in table_ts2. I have the slot stored in DrawRoad, but inserting a reference to the DrawRoad object in third position brings up errors.
HoodPlanner::HoodPlanner(QWidget *parent) : QWidget(parent)
{
setupUi(this);
// (...)
DrawRoad *drawRoad = new DrawRoad;
connect(table_ts2, SIGNAL(itemSelectionChanged()), &drawRoad, SLOT(drawSC4Street()));
}
Snipped from DrawRoad.cpp:
#include "drawroad.h"
DrawRoad::DrawRoad(QWidget *parent) : QWidget(parent)
{
}
void DrawRoad::drawSC4Street()
{
if(!table_ts2->selectionModel()->hasSelection()) return;
// (...)
}
And the following errors occur whenever I run the app:
hoodplanner.cpp:12: Fehler: no matching function for call to 'HoodPlanner::connect(QTableWidget*&, const char [24], DrawRoad**, const char [17])'
mingw492_32\include\QtCore\qobject.h:213: Fehler: no type named 'Object' in 'struct QtPrivate::FunctionPointer<const char*>'
(and lots of notes)
The errors don't help me at all and I've searched in several topics for a solution, but none of them had my problem.

Answer 1

Have you tried
HoodPlanner::HoodPlanner(QWidget *parent) : QWidget(parent)
{
setupUi(this);
// (...)
DrawRoad *drawRoad = new DrawRoad;
connect(table_ts2, SIGNAL(itemSelectionChanged()), drawRoad, SLOT(drawSC4Street()));
}
You declrared drawRoad as a pointer:
DrawRoad *drawRoad = new DrawRoad;
And then you pass its address to connect() with &drawRoad.
In this case you are passing a pointer to a pointer address. Try without the &