Usage of QT::UserRole in Qtreewidgetitem

[h4harman]

Hi,

I am having issues with using Qt::UserRole with Qtreewidgetitem.

Here's my code :

UGS::AsciiString Hdrstr = "Header";
QString str = QString::fromUtf8(Hdrstr.c_str());
QVariant Headerqv(str);
 
RootWidget->setData(0, Qt::UserRole + 1, Headerqv);

UGS::AsciiString Hdrstr = "Header";
QString str = QString::fromUtf8(Hdrstr.c_str());
QVariant Headerqv(str);

RootWidget->setData(0, Qt::UserRole + 1, Headerqv);

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And finally retrieving the value:

StrValue = Widgetitem->data(0, Qt::UserRole + 1);
	QString strval = StrValue.toString();
 
        if (strval.toStdString() == "Header")

StrValue = Widgetitem->data(0, Qt::UserRole + 1);
	QString strval = StrValue.toString();

        if (strval.toStdString() == "Header")

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In this line :
if (strval.toStdString() == "Header")

there's no value of the string. Can anyone suggest what am I doing wrong over here ?

Thank you !

[anda_skoa]

Are RootWidget and Widgetitem the same pointer?

Cheers,
_

[h4harman]

They are different pointers but they are pointing to the same item. So, yeah they got same value.

But even I do:

RootWidget->setData(0, Qt::UserRole + 1, Headerqv);
 
		QVariant StrValue = RootWidget->data(0, Qt::UserRole + 1);
		QString strval = StrValue.toString();
		string str = strval.toStdString();

RootWidget->setData(0, Qt::UserRole + 1, Headerqv);

		QVariant StrValue = RootWidget->data(0, Qt::UserRole + 1);
		QString strval = StrValue.toString();
		string str = strval.toStdString();

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To check the value right after setting the data, str value is still NULL , mean an empty string"" .

Not sure why.

Thanks,

[anda_skoa]

They are different pointers but they are pointing to the same item.

If it is not the same pointer, how can it be the same object?

But even I do:

RootWidget->setData(0, Qt::UserRole + 1, Headerqv);
 
		QVariant StrValue = RootWidget->data(0, Qt::UserRole + 1);
		QString strval = StrValue.toString();
		string str = strval.toStdString();

RootWidget->setData(0, Qt::UserRole + 1, Headerqv);

		QVariant StrValue = RootWidget->data(0, Qt::UserRole + 1);
		QString strval = StrValue.toString();
		string str = strval.toStdString();

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To check the value right after setting the data, str value is still NULL , mean an empty string"" .

Have you checked Headerqv? Does it contain the string?

Cheers,
_

[h4harman]

If it is not the same pointer, how can it be the same object?

Well I needed 2 pointers to point to the same address. So it's the same object coz they are pointing to the same value. I think that's what you wanted to say.

But anyhow, I got the solution. I was just writing some extra lines of code for no reason. I did the following :

QVariant Headerqv = QVariant("Header");
		RootWidget->setData(0, Qt::UserRole, Headerqv);
 
		QVariant StrValue = RootWidget->data(0, Qt::UserRole);
		QString strval = StrValue.toString();
		string str = strval.toStdString();

QVariant Headerqv = QVariant("Header");
		RootWidget->setData(0, Qt::UserRole, Headerqv);

		QVariant StrValue = RootWidget->data(0, Qt::UserRole);
		QString strval = StrValue.toString();
		string str = strval.toStdString();

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But thanks for all the help

Regards,

[h4harman]

If it is not the same pointer, how can it be the same object?

I think now I know why you pointed that out. So it seems, widgets are individual objects. I can't use another widget item to point to it and use it values. I thought I could do that.