Must all cellWidgets in a QTable be the same widget type?

[wysota]

Cell widgets can be of any type. I suggest you check the return value of dynamic_cast before trying to dereference the received pointer.

[davethomaspilot]

The pointer returned from the dynamic_cast is not Null.

Here's what it looks like:

watch.jpg
Also, note the line:


qb->clear();

Doesn't raise and excpetion

[wysota]

If it's not null then there is a combobox there. Where does the code crash? Show us the backtrace.

[davethomaspilot]

It looks like the crash is occuring in a slot that got called as a result of an item change in the QComboBox. Here's my method for the slot:

void CollectStats::check_lineup(int n)
{
	QComboBox *changed_cell= dynamic_cast<QComboBox *>(sender());
	changed_cell->setStyleSheet("QComboBox { background-color: white;font:16pt  }");
	for (int i=0;i<6;i++)
	{
 
		QComboBox *qp = dynamic_cast<QComboBox *>(runOrder->cellWidget(0,i));
		if (sender() ==qp) continue;
		if (qp->currentIndex()==n)
			qp->setStyleSheet("QComboBox { background-color: red; font:16pt }");
		else
			qp->setStyleSheet("QComboBox { background-color: white; font:16pt }");
 
	}
 
}

void CollectStats::check_lineup(int n)
{
	QComboBox *changed_cell= dynamic_cast<QComboBox *>(sender());
	changed_cell->setStyleSheet("QComboBox { background-color: white;font:16pt  }");
	for (int i=0;i<6;i++)
	{
	
		QComboBox *qp = dynamic_cast<QComboBox *>(runOrder->cellWidget(0,i));
		if (sender() ==qp) continue;
		if (qp->currentIndex()==n)
			qp->setStyleSheet("QComboBox { background-color: red; font:16pt }");
		else
			qp->setStyleSheet("QComboBox { background-color: white; font:16pt }");
		
	}

}

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It looks like it's dying on the

if (qp->currentIndex()==n)

if (qp->currentIndex()==n)

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I'm not sure how to print the stack trace from VS, so here are a couple of screen shots:
stack2.pngstack1.jpg

Thanks for the attention!

Found it,

Should be

for (int i=1;i<7;i++)

In the check_lineup method, after I eliminated the combobox in column 0.

I feel stupid, thanks for your extremely fast replies--it got me pointed in the right direction!

Dave Thomas