Program crashes when connecting custom signal.

[hersheyzombie]

I have a mainwindow with a textedit widget.
I would like my mainwindow to have an instance of a custom class, called "scene" that has signals and slots connected to ui items, like my textedit widget.

I create my scene as follows:

scene.h

class scene : public QObject
{
     Q_OBJECT
 
public:
    scene();
 
signals:
    void setImName(const QString&);
};

class scene : public QObject
{
     Q_OBJECT

public:
    scene();

signals:
    void setImName(const QString&);
};

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scene.cpp

#include "scene.h"
 
scene::scene() : QObject()
{
    emit setImName( tr("hello") );
}

#include "scene.h"

scene::scene() : QObject()
{
    emit setImName( tr("hello") );
}

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In my mainwindow code, I declare a scene called "myScene" and attempt to connect it to the slot for my textedit widget. This compiles without error but results in a memory access related crash when I run my program. Commenting the "connect" line allows my program to run (but of course not behave as desired).

connect(myScene, SIGNAL(setImName(const QString&)), ui->textEdit1, SLOT(setText(QString)));

connect(myScene, SIGNAL(setImName(const QString&)), ui->textEdit1, SLOT(setText(QString)));

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Any ideas what I am doing wrong?
I would appreciate any example where someone has created their own QObject with signals and slots that connect to ui widgets...

[Lykurg]

I guess the problem is the order of your statements. Can you show us the constructor of your main window.

[hersheyzombie]

That was it!

I was declaring my scene after the connect statement.

Thanks.

[ashishsaryar]

Hi

I think there is problem of connect statement..
1.connect(myScene, SIGNAL(setImName(const QString&)), ui->textEdit1, SLOT(setText(QString)));

It should be like this..
1.connect(myScene, SIGNAL(setImName(const QString&)), ui->textEdit1, SLOT(setText(const QString&)));
I hope it will work.

[Lykurg]

I hope it will work.

As hersheyzombie already said, the order was the problem and it doesn't make any difference if your write

SLOT(setText(QString))

SLOT(setText(QString))

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or

SLOT(setText(const QString&))

SLOT(setText(const QString&))

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.

[ashishsaryar]

May be crash will happen by ui->textedit...

Just check ui has got memory or not.