Progress bar form QLineEdit issue

[RafalNiewinski]

Hello, It is my first post on the QtCentre forum so please correct any mistakes.

I have a problem with create something like QProgressBar from QLineEdit (QLineEdit functionality + QProgressBar functionality in one QWidget).

I created a class derived from QLineEdit which overloads paintEvent method.
Progress functionality works fine but I am lost QLineEdit functions such as carriage drawing, visibility of text selection etc.

My paintEvent method:

void MyLineEdit::paintEvent(QPaintEvent * event)
{
    QPainter p(this);
    QStyleOptionFrameV2 panel;
    initStyleOption(&panel);
    style()->drawPrimitive(QStyle::PE_PanelLineEdit, &panel, &p, this);
 
    QPainter painter(this);
    QStyleOptionFrameV2 lenap;
    initStyleOption(&lenap);
    QRect backgroundRect = style()->subElementRect(QStyle::SE_LineEditContents, &lenap, this);
 
    if(!hasFocus() && progress < 100)
    {
        QColor loadingColor = QColor(116, 192, 250);
        painter.setBrush(generateGradient(loadingColor));
        painter.setPen(Qt::transparent);
        int mid = backgroundRect.width() / 100 * progress;
        QRect progressRect(backgroundRect.x(), backgroundRect.y(), mid, backgroundRect.height());
        painter.drawRect(progressRect);
    }
 
    painter.setPen(Qt::SolidLine);
    painter.drawText(backgroundRect,Qt::AlignLeft|Qt::AlignVCenter, this->text());
}

void MyLineEdit::paintEvent(QPaintEvent * event)
{
    QPainter p(this);
    QStyleOptionFrameV2 panel;
    initStyleOption(&panel);
    style()->drawPrimitive(QStyle::PE_PanelLineEdit, &panel, &p, this);

    QPainter painter(this);
    QStyleOptionFrameV2 lenap;
    initStyleOption(&lenap);
    QRect backgroundRect = style()->subElementRect(QStyle::SE_LineEditContents, &lenap, this);

    if(!hasFocus() && progress < 100)
    {
        QColor loadingColor = QColor(116, 192, 250);
        painter.setBrush(generateGradient(loadingColor));
        painter.setPen(Qt::transparent);
        int mid = backgroundRect.width() / 100 * progress;
        QRect progressRect(backgroundRect.x(), backgroundRect.y(), mid, backgroundRect.height());
        painter.drawRect(progressRect);
    }

    painter.setPen(Qt::SolidLine);
    painter.drawText(backgroundRect,Qt::AlignLeft|Qt::AlignVCenter, this->text());
}

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[Lykurg]

Haven't tried it but shouln't it be possible to simple set your background gradient into the palette of the line edit before calling the base class implementations QLineEdit::paint()?

[RafalNiewinski]

Ok thanks

this is solved my problem:

void MyLineEdit::paintEvent(QPaintEvent * event)
{
    QPainter p(this);
    QStyleOptionFrameV2 panel;
    initStyleOption(&panel);
    style()->drawPrimitive(QStyle::PE_PanelLineEdit, &panel, &p, this);
 
    if(hasFocus() || progress == 100) QLineEdit::paintEvent(event);
 
    QPainter painter(this);
    QStyleOptionFrameV2 lenap;
    initStyleOption(&lenap);
    QRect backgroundRect = style()->subElementRect(QStyle::SE_LineEditContents, &lenap, this);
 
    if(!hasFocus() && progress < 100)
    {
        QColor loadingColor = QColor(116, 192, 250);
        painter.setBrush(generateGradient(loadingColor));
        painter.setPen(Qt::transparent);
        int mid = backgroundRect.width() / 100 * progress;
        QRect progressRect(backgroundRect.x(), backgroundRect.y(), mid, backgroundRect.height());
        painter.drawRect(progressRect);
 
        painter.setPen(Qt::SolidLine);
        painter.drawText(backgroundRect,Qt::AlignLeft|Qt::AlignVCenter, " " + this->text());
    }
}

void MyLineEdit::paintEvent(QPaintEvent * event)
{
    QPainter p(this);
    QStyleOptionFrameV2 panel;
    initStyleOption(&panel);
    style()->drawPrimitive(QStyle::PE_PanelLineEdit, &panel, &p, this);

    if(hasFocus() || progress == 100) QLineEdit::paintEvent(event);

    QPainter painter(this);
    QStyleOptionFrameV2 lenap;
    initStyleOption(&lenap);
    QRect backgroundRect = style()->subElementRect(QStyle::SE_LineEditContents, &lenap, this);

    if(!hasFocus() && progress < 100)
    {
        QColor loadingColor = QColor(116, 192, 250);
        painter.setBrush(generateGradient(loadingColor));
        painter.setPen(Qt::transparent);
        int mid = backgroundRect.width() / 100 * progress;
        QRect progressRect(backgroundRect.x(), backgroundRect.y(), mid, backgroundRect.height());
        painter.drawRect(progressRect);

        painter.setPen(Qt::SolidLine);
        painter.drawText(backgroundRect,Qt::AlignLeft|Qt::AlignVCenter, " " + this->text());
    }
}

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