Difficulty central pixmap inside Ellipse

alvinNew

drawPixmap-Drawing rectangular portion source of the given image into target rectangle
painter.drawPixmap(rectangle,pixmap,source);
Having difficulty central pixmap inside Ellipse

'''
#include "circlepict.h"
#include <QtWidgets>

CirclePict::CirclePict(QWidget *parent)
: QWidget(parent)
{
QTimer *timer = new QTimer(this);
connect(timer, SIGNAL(timeout()), this, SLOT(update()));
timer->start(1000);

setWindowTitle(tr("MyWidget"));
resize(200, 200);

}

void CirclePict::paintEvent(QPaintEvent *)
{
QPainter painter(this);

QPixmap pm(100,100);
pm.fill();
painter.setRenderHint(QPainter::Antialiasing);

QPen pen1(Qt::red,6);
painter.setPen(pen1);
QRectF rectangle(20.0,20.0,160.0,180.0);
QRectF CircleRect(10,10,180,180);
QRectF source(0.0,0.0,70.0,70.0);

QPixmap pixmap(":house.png");
painter.drawPixmap(rectangle,pixmap,source);
painter.drawEllipse(CircleRect);

}

SGaist

Hi,

Can you explain what you are trying to achieve and what is currently happening ?

alvinNew

Want to centre a pixmap in a circle.
The pixmap is not central entirely inside the circle. A bit of the pixmap is outside this circle.

The class is circlepict.cpp in github
https://github.com/houmingc/CircularProgressBar/tree/master/analogclock

SGaist

You need to do some maths to either calculate the size of a rectangle for a given circle or the circle for a given rectangle.