Hello!
I started this month programming with QT. So long I've been able to create a GUI (ControlLoop) with the QT Designer and access its widgets with signals and slots declared in the Sourcefile. Now I have a new class (StartGui) which inherits from ControlLoop. In StartGui I'm trying to catch the signals from the ControlLoop's widgets at runtime, I have tried almost everything I've read. I connect the signals and slots in der StartGui class and get no error messages. But whenever the program is running and I change the Text in e.g. a QLineEdit, nothing happens. Could you please help me? I've been stuck at this point for days.
I don't know what I'm doing wrong whenever I connect the Widgets, the nothing happens when the programm is running and I do any of the signals.
Here are the headers of my files:
ControlLoop.h
#ifndef CONTROLLOOP_H
#define CONTROLLOOP_H
#include <QObject>
#include <QMainWindow>
namespace Ui {
class ControlLoop;
}
class ControlLoop : public QMainWindow
{
Q_OBJECT
public:
explicit ControlLoop(QWidget *parent = 0);
~GUIRegelKreis();
Ui::ControlLoop *ui;
ControlLoop .cpp
#include "controloop.h"
#include "ui_controloop.h"
ControLoop::ControLoop(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::ControLoop)
{
ui->setupUi(this);
}
And the StartGUI files:
startgui.h
#ifndef STARTGUI_H
#define STARTGUI_H
#include "controlloop.h"
#include "ui_guiregelkreis.h"
class StartGui : public ControlLoop
{
Q_OBJECT
public:
StartGui();
ControlLoop *GUI;
public slots:
on_JobLineEdit_textChanged(QString)
....
}
StartGui.cpp
#include "startgui.h"
#include "ui_controlloop.h"
StartGui::StartGui()
{
GUI = new ControlLoop();
connect(GUI->ui->JobLineEdit, SIGNAL(textChanged(QString)),
this, SLOT(on_JobLineEdit_textChanged(QString)));
connect(GUI->ui->MaschineLineEdit, SIGNAL(textChanged(QString)),
this, SLOT(on_MaschineLineEdit_textChanged(QString)));
....
void StartGui:n_JobLineEdit_textChanged(QString)
{
...
}
...
}
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