Image alignment in QTableview

[Match0um]

Hi guys !

Do someone knows how to center a picture in a QTableview cell ?
Here is my code :

QStandardItem *itemProfilClient = new QStandardItem();
itemProfilClient->setData(QVariant(insertClient._profil.scaled(200,200, Qt::KeepAspectRatio)), Qt::DecorationRole);
itemProfilClient->setTextAlignment(Qt::AlignCenter);
_model->setItem(2, 3, itemProfilClient);

The issue is that the picture (which is insertClient._profil (QPixmap)) is not centered in the cell, but aligned left.

Can somebody help me please ? 😊

[eyllanesc]

@Match0um You cannot change the alignment of the image using the model, in this case the solution is to use a QProxyStyle:

class ProxyStyle: public QProxyStyle{
public:
    using QProxyStyle::QProxyStyle;
    QRect subElementRect(SubElement subElement, const QStyleOption *option, const QWidget *widget) const override{
        QRect rect = QProxyStyle::subElementRect(subElement, option, widget);
        if(subElement == SE_ItemViewItemDecoration){
            rect.moveCenter(option->rect.center());
        }
        return rect;
    }
};

view->setStyle(new ProxyStyle(view->style()));

[Match0um]

@eyllanesc Thank you so much it works !

[VRonin]

There is no real need to reimplement a proxy style, it can easily be done with a delegate:

class AlignPicCenterDelegate : public QStyledItemDelegate{
public:
    using QStyledItemDelegate::QStyledItemDelegate;
protected:
    void initStyleOption(QStyleOptionViewItem *option, const QModelIndex &index) const override {
        QStyledItemDelegate::initStyleOption(option,index);
        option->decorationAlignment = Qt::AlignCenter;
    }
};

Then on your view you can call https://doc.qt.io/qt-5/qabstractitemview.html#setItemDelegate