How to change Qtreeview expand or collapse icon position

[abdullahzubair109]

@mrjj well let me test

[abdullahzubair109]

@mrjj can you kindly post a pseudo code?? i tried modifying QStyleOptionViewItem rect under paint function.. but got weird result

[mrjj]

@abdullahzubair109
well that was my idea too but altering the options rect might do strange stuff and
we might end up needing to draw the text manually for it to be possible.

• but got weird result
  in what way ?

[abdullahzubair109]

@mrjj i am using painter->drawText();

[mrjj]

@abdullahzubair109
Hi
tested a bit.
seems to be possible

class TextDelegate : public QStyledItemDelegate
{

public:
    TextDelegate(QObject *parent)
        : QStyledItemDelegate(parent)
    {

    }
    QSize sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const
    {
        QSize ret = QStyledItemDelegate::sizeHint(option, index);
        return ret;
    }
    void paint(QPainter *painter, const QStyleOptionViewItem &option,
               const QModelIndex &index) const
    {
        QStyleOptionViewItem itemOption(option);

        initStyleOption(&itemOption, index);
        itemOption.rect.adjust(130, 0, 0, 0);
        QApplication::style()->drawControl(QStyle::CE_ItemViewItem, &itemOption, painter, nullptr);

    }
};

ui->treeWidget->setStyle( new MyStyleProxy );
ui->treeWidget->setItemDelegate( new TextDelegate(this) );

[abdullahzubair109]

@mrjj i tried something like this, but didn't work

void StyledDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const
{

	if (index.column() == 0) {
	
		QString qs = index.data().toString();
		QPoint pt = option.rect.center(); 
		pt += QPoint(40, 0);
		painter->drawText( pt, qs);
	}
	QStyledItemDelegate::paint(painter, option, index);

}

[mrjj]

@abdullahzubair109
ok, but what was wrong ? it didnt move text ?

[abdullahzubair109]

@mrjj nope

[mrjj]

@abdullahzubair109
well the style+delegate works fine but selection starts at text.
If you really want seletion to start at icon, you have to dig into
drawControl and implement the part you want.
you can use
https://code.woboq.org/qt5/qtbase/src/widgets/styles/qcommonstyle.cpp.html
to easy dig around source.

[abdullahzubair109]

@mrjj thanks for your time.. i will check tomorrow .. when you are free, can you look at my code in more details why drawText didn't work??

[mrjj]

@abdullahzubair109
well you call both
painter->drawText( pt, qs); and
QStyledItemDelegate::paint
so maybe it just overrode your text.

[abdullahzubair109]

@mrjj hmm i get it

[mrjj]

@abdullahzubair109
hi
using else it does move text for me. ( to the center )

        if (index.column() == 0) {

            QString qs = index.data().toString();
            QPoint pt = option.rect.center();
            pt += QPoint(0, 0);
            painter->drawText( pt, qs);
        } else
            QStyledItemDelegate::paint(painter, option, index);

but it kills the selection drawing.