[Solved] QComboBox change style

Sam

Hi,

A QComboBox renders the following output when disabled/enabled

disabled
!http://img209.imageshack.us/img209/5448/discombo.png(disabled_combo)!

enabled
!http://img28.imageshack.us/img28/7385/encombo.png(enabled)!

Is there any way that I can render the enabled style even when setEnable is false for QComboBox. My requirement is to disable item selection/showPopup for the combobox on a particular condition.

andre

Everything is possible, but why do you want to confuse your users by making it look like your combo is enabled when it is not?

Sam

I have the list that contains processed and unprocessed items with different background color. The user is not allowed to change any entry if item is already processed but i want to render the enabled style for combobox as there are other components that are enabled.

Whereas for unprocessed items the user is allowed to make changes as per requirement.

andre

It still sounds like a Bad Idea(TM) to me. However, one way is to use a proxy style on your combo box and simply manipulate the appropriate flag. Something like this should work:

@
class EnabledStyle: public QProxyStyle {
public:
virtual void drawComplexControl ( ComplexControl control, const QStyleOptionComplex * option, QPainter * painter, const QWidget * widget = 0 ) const;
}

void EnabledStyle::drawComplexControl ( ComplexControl control, const QStyleOptionComplex * option, QPainter * painter, const QWidget * widget ) const
{
if (control == CC_ComboBox && option) {
QStyleOptionComboBox enabledOption(*option);
enabledOption.state |= QStyle::State_Enabled;
QProxyStyle::drawComplexControl(control, &enabledOption, painter, widget);
} else {
//simply pass through
QProxyStyle::drawComplexControl(control, option, painter, widget);
}
}
@

Sam

@Andre

bq. It still sounds like a Bad Idea™ to me.

Thats's the specification I got :)

@void EnabledStyle::drawComplexControl(QStyle::ComplexControl control, const QStyleOptionComplex *option, QPainter *painter, const QWidget *widget) const
{
if (control == CC_ComboBox && option)
{
QStyleOptionComboBox enabledOption;
enabledOption.palette = option->palette;
enabledOption.rect = option->rect;
enabledOption.state |= QStyle::State_Enabled;
painter->setPen(QColor(Qt::black));

    QProxyStyle::drawComplexControl(control, &enabledOption, painter, widget);

} else {

    //simply pass through
    QProxyStyle::drawComplexControl(control, option, painter, widget);
}

}@

The code works perfect , I owe you a beer :)

Thanks.