QFIleSystemModel with custom delegate have no access to Qt::DecorationRole?

[Scope]

Hi,

I have QFileSystemModel and Custom delegate which inherits from QAbstractItemDelegate and inside paint function I try to paint item icon like that

// ICON
QIcon ic = QIcon(qvariant_cast<QPixmap>(index.data(Qt::DecorationRole)));
r = option.rect.adjusted(2, 2, -2, -2);
ic.paint(painter, r, Qt::AlignVCenter|Qt::AlignLeft);

// ICON
QIcon ic = QIcon(qvariant_cast<QPixmap>(index.data(Qt::DecorationRole)));
r = option.rect.adjusted(2, 2, -2, -2);
ic.paint(painter, r, Qt::AlignVCenter|Qt::AlignLeft);

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but it does nothing, ic.name() return empty string.
Without setting delegate I see "standard" icons provides by QFileSystemModel so problem is in my delegate implementation.

[anda_skoa]

What do you need the QIcon for?

Have you checked that data() returns a non-empty variant?
And if yes, does it contain a QPixmap?

Cheers,
_

[Scope]

I added these lines inside delegate paint function

QVariant var = index.data(Qt::DecorationRole);
qDebug()<< "var is null?: " << var.isNull();    // false
qDebug()<< "var is valid?: " << var.isValid(); // true
qDebug()<< "icon is null: " << QIcon(qvariant_cast<QPixmap>(var)).isNull();  // true

QVariant var = index.data(Qt::DecorationRole);
qDebug()<< "var is null?: " << var.isNull();    // false
qDebug()<< "var is valid?: " << var.isValid(); // true
qDebug()<< "icon is null: " << QIcon(qvariant_cast<QPixmap>(var)).isNull();  // true

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but in listView each item has icon...
When in paint function I add line

QIcon ic = QIcon(":/Icons/light/files.png");

QIcon ic = QIcon(":/Icons/light/files.png");

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then all works great so I think that problem is in file system model which not contain properly icon under Qt:ecorationRole, it is possible?

[Scope]

Ok I found error

QIcon ic = QIcon(qvariant_cast<QPixmap>(index.data(Qt::DecorationRole)));

QIcon ic = QIcon(qvariant_cast<QPixmap>(index.data(Qt::DecorationRole)));

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should be

QIcon ic = qvariant_cast<QIcon>(index.data(Qt::DecorationRole));

QIcon ic = qvariant_cast<QIcon>(index.data(Qt::DecorationRole));

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mistake was bad cast.

[anda_skoa]

mistake was bad cast.

Make one wonder why I didn't suggest to check if the variant actually contained a QPixmap.
Oh wait, I did.

Cheers,
_

[Scope]

Yes, you were right.
I solve that problem thanks to your suggestions.