[Solved]QStyleOptionProgressBar and style sheet

redstoneleo · wrote on 8 Jun 2013, 09:20

I'm painting a QProgressBar (using QStyleOptionProgressBar) into a QabstractTableModel ,the code just like this
http://qt-project.org/doc/qt-4.8/qabstractitemdelegate.html

now I want to set its style sheet similar to this

('QProgressBar::chunk {background-color: rgb(102, 204, 255);} QProgressBar {border: 2px solid rgb(0, 128, 255); border-radius: 5px; background-color: rgb(200, 200, 200);}')

so what syntax should I use ?

francescmm · 13 Apr 2019, 15:01

What I can remember when using a delegate class I couldn't use the stylesheet. To style as my own way I avoid the use of QStyleOptionProgressBar.

I subclass QStyledItemDelegate and rewrite the paint() method as follows:

ProgressBarDelegate.h
@#ifndef PROGRESSBARDELEGATE_H
#define PROGRESSBARDELEGATE_H

#include <QStyledItemDelegate>

class ProgressBarDelegate : public QStyledItemDelegate
{
Q_OBJECT

public:
    explicit ProgressBarDelegate(QObject *parent = 0) : QStyledItemDelegate(parent)
    {}
    void paint(QPainter *painter, const QStyleOptionViewItem &option,
               const QModelIndex &index) const;

};

#endif // PROGRESSBARDELEGATE_H
@

ProgressBarDelegate.cpp
@#include <QApplication>
#include <QPainter>
#include <QProgressBar>
#include "ProgressBarDelegate.h"
#include <QFile>

void ProgressBarDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option,
const QModelIndex &index) const
{
index.data(Qt::FontRole);
int progress = index.data().toInt();

if (progress >= 0)
{
    QRect rect(option.rect.x()+5, option.rect.y()+5, option.rect.width(),
               option.rect.height()-10);

    painter->save();
    painter->setRenderHint(QPainter::Antialiasing);
    painter->setBrush(QColor(75,75,75));
    painter->setPen(QColor("transparent"));
    QRect rect2(option.rect.x()+3, option.rect.y()+3, option.rect.width()-5,
                option.rect.height()-7);
    painter->drawRoundedRect(rect2,5,5);
    painter->restore();

    /*
        I calculate the area to paint the simulated ProgressBar.
    */
    int progBarWidth = float((option.rect.width() * progress) / 100);
    if (progBarWidth > 5)
    {
        //Painting the ProgressBar
        painter->save();
        painter->setRenderHint(QPainter::Antialiasing);
        painter->setPen(QColor("transparent"));
        painter->setBrush(QColor(65,105,255));
        QRect rect5(option.rect.x()+3, option.rect.y()+3, progBarWidth-3,
                    option.rect.height()-7);
        painter->drawRoundedRect(rect5,5,5);
        painter->restore();
    }
    else
        progBarWidth = 5;

    painter->save();
    painter->setRenderHint(QPainter::Antialiasing);
    painter->setPen(QColor("transparent"));
    painter->setBrush(QColor(65,105,255));
    QRect rect3(option.rect.x()+5, option.rect.y()+3, progBarWidth-5,
                option.rect.height()-7);
    painter->drawRect(rect3);
    painter->restore();

    painter->save();
    painter->setRenderHint(QPainter::Antialiasing);
    painter->setPen(QColor("white"));
    painter->setBrush(QColor("transparent"));
    QRect rect4(option.rect.x()+1, option.rect.y()+2, option.rect.width()-3,
                option.rect.height()-5);
    painter->drawRoundedRect(rect4,5,5);
    painter->restore();
    }

}
@

The main reason to use the [+num] operations is to set the progressbar in a specific position. I hope it would be useful for you!

redstoneleo · wrote on 27 Oct 2013, 09:26

thanks very much !
[quote author="francescmm" date="1370803385"]What I can remember when using a delegate class I couldn't use the stylesheet. To style as my own way I avoid the use of QStyleOptionProgressBar.