Drawing circles using QPainter

n-2204

Hi,
1->I need to draw circles based on user value in a table(Qtableview).
2->draw/connect two circle using line (CD)
3->shows direction in circle like arc kind (--->)
4->i need to display this circle in my tab2 (Qtabwidget)
How to do this ?

like simply i can do like this:

{
QPainter myellip(this);
QPen epen;
int x = 10;
epen.setWidth(3);
epen.setColor(Qt::yellow);
epen.setBrush(Qt::SolidPattern);
// myellip.setBrush(Qt::SolidPattern);
myellip.setPen(epen);
myellip.drawEllipse(QRect(150, 300, 100, 100));
}

How can i do these all ? How to approach ?

SGaist

Hi,

Do you mean as an overlay ?

n-2204

like this I need to do
How to do ?
If anyone has any example related to this plz share

n-2204

void table_model::paintEvent(QPaintEvent* event)  
{
QPainter myellip(this);
QPen epen;
int x = 10;
epen.setWidth(3);
epen.setColor(Qt::yellow);
epen.setBrush(Qt::SolidPattern);
 // myellip.setBrush(Qt::SolidPattern);
myellip.setPen(epen);
myellip.drawEllipse(QRect(150, 300, 100, 100));
}

how can i display this circle in my tab2 (Qtabwidget)

Bondrusiek

@n-2204
Hi,
maybe try use function paintEvent() in tab2 ie:

void tab2::paintEvent(QPaintEvent* event)  
{
QPainter myellip(this);
QPen epen;
int x = 10;
epen.setWidth(3);
epen.setColor(Qt::yellow);
epen.setBrush(Qt::SolidPattern);
 // myellip.setBrush(Qt::SolidPattern);
myellip.setPen(epen);
myellip.drawEllipse(QRect(150, 300, 100, 100));
}

n-2204

Oh,,actually i haven't created class for tab2 widget
QPainter myellip(this);
can't i do like this-> QPainter myellip(ui.tab2);

SGaist

No, you cannot paint on another widget.

mrjj

Hi
well you can paint on a pixmap and show in a QLabel

 QPixmap pix(200, 200);
  pix.fill(Qt::blue);
  QPainter painter (&pix);
  painter.setRenderHint(QPainter::Antialiasing, true);
  ..... draw ...
  ui->label->setPixmap(pix);

n-2204

@mrjj
ok Thankyou..
using Qpixmap & Qpainter is a good approach to draw the circles as i shared image above and i need to draw arc, lines & input for circle is from Qtableview

mrjj

@n-2204

Hi
If you data is from a View, its actually from its model.

but was it a question or ?

QPainter has all the functions you need to do it.

except maybe for the small arrow inside the circle