[Interest] Issue in drawing CheckBox using QStyle::drawPrimitive

Nurmi J-P jpnurmi at digia.com
Tue Nov 27 15:03:23 CET 2012

> I am drawing a checkbox inside a custom delegate using
> QStyle::drawPrimitive. I use this custom delegate to render items of a
> QListView. Paint method of my custom delegate is as below,
> void MytDelegate::paint(QPainter *painter,
>             const QStyleOptionViewItem &option,
>             const QModelIndex &index) const {
> QStyleOptionViewItem checkBoxStyle(option);
> // set checkBoxStyle.rect here
> checkBoxStyle.state = QStyle::State_On;

This assignment overrides any state flags that were copied from 'option'. Use bitwise OR instead:

checkBoxStyle.state |= QStyle::State_On;

J-P Nurmi

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