How to change the height and text font size of qtreeview item

[NoumanYosuf]

Hi all,
I have a treeview and I want to change the height of each item (QModelIndex) and also change the font size to fit into it well.
I found a way to change the size of each treeview item (50,as i needed), but unable to figure out how to change the font size.
Below is the code :

class Delegate : public QStyledItemDelegate
{
    Q_OBJECT
public:
    QSize sizeHint(const QStyleOptionViewItem &p_option, const QModelIndex &p_index) const //this function to compensate the alignment
    {
        QSize size = QStyledItemDelegate::sizeHint(p_option, p_index);
        if (p_index.column() == 1 || p_index.column() == 0)
        {
            size.setHeight(100);
        }
        return size;
    }
};

tree->setItemDelegate(new Delegate());

Also I know I can change the modelIndex heigth from model also, but again I am not sure how to set the font size.
Could anyone please let me a way to achieve this.

[Gojir4]

Hi,
I guess you could reimplement QStyledItemDelegate::initStyleOption()

void Delegate::initStyleOption(QStyleOptionViewItem *option, const QModelIndex &index) const {
    QStyledItemDelegate::initStyleOptions(option, index);
    if (p_index.column() == 1 || p_index.column() == 0)
    {
        option->font.setPointSize(20);
        //or setPixelSize(...);
        //or setPointSizeF(...);
    }
}

font is a public variable from QStyleOptionViewItem

[Gojir4]

Hi,
I guess you could reimplement QStyledItemDelegate::initStyleOption()

void Delegate::initStyleOption(QStyleOptionViewItem *option, const QModelIndex &index) const {
    QStyledItemDelegate::initStyleOptions(option, index);
    if (p_index.column() == 1 || p_index.column() == 0)
    {
        option->font.setPointSize(20);
        //or setPixelSize(...);
        //or setPointSizeF(...);
    }
}

font is a public variable from QStyleOptionViewItem

[NoumanYosuf]

@Gojir4 Thank you for you reply.
It tired this but the content of the treeitem is missing now.
I tried all the options :

option->font.setPointSize(50);
option->font.setPixelSize(50);
option->font.setPointSizeF(50);

.

[Christian Ehrlicher]

Do you also call the base implementation of initStyleOption()? I would guess no.

[Gojir4]

@NoumanYosuf @Christian-Ehrlicher My bad. I did correct the code it should work better now.

[NoumanYosuf]

Hey @Christian-Ehrlicher and @Gojir4 yes its works fine. thank you both for the help.