Many signals one slot

[^Nisok^]

Another newbie question.

Signals emittes from 5 pushbuttons have to be connected with one slot. But this slot must know from which pushbutton was activated. I already tried to do this:

slot (int i);
...
connect(push1, SIGNAL(clicked()),this, slot(1));

slot (int i);
...
connect(push1, SIGNAL(clicked()),this, slot(1));

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But doesn't work.
Any suggestions?

[Lykurg]

Have a look at QObject::sender().

MyClass::mySlot(){
if (sender() == myButton1)
{...}
}

MyClass::mySlot(){
if (sender() == myButton1)
{...}
}

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[wysota]

Have a look at QSignalMapper.

[^Nisok^]

Thanks again. I used the mapping and I did it.
But this success led me to another different problem. I will continue to this thread.
Part of configdilog.h

private:
	QLineEdit *ebmFloodImage,*ebmFloodImage20, *ebmCrystalEnergies, *ebmIMat, *ebmJMat;
	QPushButton *psbFloodImage,*psbFloodImage20, *psbCrystalEnergies, *psbIMat, *psbJMat;
	QString fl, fl20, ec, im, jm;
	QSignalMapper *sm;
private slots:
	void selectFile(const QString &);

private:
	QLineEdit *ebmFloodImage,*ebmFloodImage20, *ebmCrystalEnergies, *ebmIMat, *ebmJMat;
	QPushButton *psbFloodImage,*psbFloodImage20, *psbCrystalEnergies, *psbIMat, *psbJMat;
	QString fl, fl20, ec, im, jm;
	QSignalMapper *sm;
private slots:
	void selectFile(const QString &);

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And at the constructor I implement everything you see here. I connect the pushbuttons with the slot selectFile. But when I go to the slot and select a new file, I cannot "print" the new name to the lineEdits (from the slot routine, at the constructor I can set the Text). The following runtime error appears.

Program received signal SIGSEGV, Segmentation fault.
0x00007f7a0331b6f0 in QLineEdit::setText () from /usr/lib/libQtGui.so.4

Program received signal SIGSEGV, Segmentation fault.
0x00007f7a0331b6f0 in QLineEdit::setText () from /usr/lib/libQtGui.so.4

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Do have any idea where this comes from??

[jpn]

Probably you have a local variable in the constructor, instead of assigning to the member variable:

Type* var = new Something;
// vs.
var = new Something; // <-- should be like this

Type* var = new Something;
// vs.
var = new Something; // <-- should be like this

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[^Nisok^]

Thanx, a lot! That was the problem. The statement that I had meant that I redeclare a new LineEdit and I don't use the global one?

[jpn]

One assigns to a new local variable, another assigns to the member variable. Member variables are not global variables.

[^Nisok^]

Yes... sorry.. idiot mistake...