How to get a QPixmap from a QTableWidgetItem?

[gboelter]

Sorry guys & girls,

it's late and I'm tired but I have to fix something in my code, something where I could not figure out where I'm wrong.

The question is simple: How can I get a QPixmap from a QTableWidgetItem?

I have tried so many already but's all not working. Guess I should go to bed, but I'm really under pressure with that.

Why this code for example

QPixmap pixmap = QPixmap::grabWidget( currentItem(), 0, 0, 158, 18 );

QPixmap pixmap = QPixmap::grabWidget( currentItem(), 0, 0, 158, 18 );

To copy to clipboard, switch view to plain text mode 

gives me:

error: no matching function for call to ‘QPixmap::grabWidget(QTableWidgetItem*, int, int, int, int)’
.....
candidates are: static QPixmap QPixmap::grabWidget(QWidget*, const QRect&)
                static QPixmap QPixmap::grabWidget(QWidget*, int, int, int, int)

error: no matching function for call to ‘QPixmap::grabWidget(QTableWidgetItem*, int, int, int, int)’
.....
candidates are: static QPixmap QPixmap::grabWidget(QWidget*, const QRect&)
                static QPixmap QPixmap::grabWidget(QWidget*, int, int, int, int)

To copy to clipboard, switch view to plain text mode 

Where I'm to blind to the the trees in the forrest tonight?

[Lykurg]

See the QTableWidgetItem::data() with the decoration role.

[tbscope]

A QTableWidgetItem is not a QWidget, so grabWidget does not work.
What do you want to achieve? Do you want to make a pixmap of one item in the table?

[gboelter]

Some days are like that ...

A QTableWidgetItem is not a QWidget, so grabWidget does not work.

I know, I should stop for today, I'm so tired ...

What do you want to achieve? Do you want to make a pixmap of one item in the table?

Yes, that's exactly what I like to do ...

Any idea how to do that?

[gboelter]

See the QTableWidgetItem::data() with the decoration role.

Thanks Lykurg!

Have tried this now ...

QPixmap TableWidget::selectedPixmap() const
{
    if ( !currentItem() )
    {
        qDebug() << "no item found ...";
        return QPixmap();
    }
    else
    {
        qDebug() << "current item is" << currentItem();
        return currentItem()->data( Qt::DecorationRole ).value<QPixmap>();
    }
}

QPixmap TableWidget::selectedPixmap() const
{
    if ( !currentItem() )
    {
        qDebug() << "no item found ...";
        return QPixmap();
    }
    else
    {
        qDebug() << "current item is" << currentItem();
        return currentItem()->data( Qt::DecorationRole ).value<QPixmap>();
    }
}

To copy to clipboard, switch view to plain text mode 

but's still the same.

qDebug() returns 'current item is 0x1422a10'
qDebug() << currentItem()->data( Qt:ecorationRole ) returns ''QVariant(QString, "ArtMatch")'

But QSize returns 'QSize(-1, -1)'!

For testing I have tried to set my pixmap from an image with

QPixmap pixmap( ":/images/ampel_rot.jpg" );

QPixmap pixmap( ":/images/ampel_rot.jpg" );

To copy to clipboard, switch view to plain text mode 

With that my programm will work, but I need a pixmap with the content of currentItem()!

Any other ideas?

[Lykurg]

Ok, I get you wrong. If you need to render a whole item then use QTableWidget::visualItemRect() with QWidget::render() of the table widget.

[wysota]

You can call the delegate to render the item.

[gboelter]

If you need to render a whole item then use QTableWidget::visualItemRect() with QWidget::render() of the table widget.

Thanks Lykurg,

got it working in that way.

Thank you very much!!!

[gboelter]

You can call the delegate to render the item.

Thanks wysota,

will try it next time with delegate because I have never used delegate before.

For now it's fixed with the help from Lykurg.

I really love the forum here!!!