Who can draw this Area with QPainter?

[mehrdadsilver]

Untitled.jpg

how can draw this are with QPainter?

I used two pie with composite mode but i wasn't success ((

please help me

[Santosh Reddy]

Try this

class Painter : public QWidget
{
public:
    explicit Painter(QWidget * parent = 0) : QWidget(parent) { }
 
    QSize sizeHint(void) const { return QSize(500, 500); }
 
protected:
    void paintEvent(QPaintEvent * event)
    {
        const int arkWidth = 40;
        const QRect & rect = event->rect();
        const int side = qMin(rect.height(), rect.width());
 
        if(side < (arkWidth * 2))
            return;
 
        QPainter painter(this);
 
        QPen pen = painter.pen();
        pen.setColor(Qt::darkBlue);
        pen.setWidth(arkWidth);
        painter.setPen(pen);
 
        const int margin = pen.width();
        QRect r(0, 0, side, side);
        r.adjust(0, 0, -margin, -margin);
        r.moveCenter(rect.center());
 
        const int start = 20;
        const int end = 180 - start * 2;
 
        painter.drawArc(r, start * 16, end * 16);
    }
};

class Painter : public QWidget
{
public:
    explicit Painter(QWidget * parent = 0) : QWidget(parent) { }

    QSize sizeHint(void) const { return QSize(500, 500); }

protected:
    void paintEvent(QPaintEvent * event)
    {
        const int arkWidth = 40;
        const QRect & rect = event->rect();
        const int side = qMin(rect.height(), rect.width());

        if(side < (arkWidth * 2))
            return;

        QPainter painter(this);

        QPen pen = painter.pen();
        pen.setColor(Qt::darkBlue);
        pen.setWidth(arkWidth);
        painter.setPen(pen);

        const int margin = pen.width();
        QRect r(0, 0, side, side);
        r.adjust(0, 0, -margin, -margin);
        r.moveCenter(rect.center());

        const int start = 20;
        const int end = 180 - start * 2;

        painter.drawArc(r, start * 16, end * 16);
    }
};

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[mehrdadsilver]

tnx Santosh , but i want to draw width of area dynamically with 500 pixel to 800 pixel Arc width and with these the area is not suitable (

[wysota]

Use clipping to obtain the effect you want. Alternatively you can probably obtain a similar effect using QPainterPath.