Overloading Shape Paint change on scene zoom

[matteo.boscolo]

Hi ,

Look at the following image and as you can see the two image are taken at a difference zooming level on the some entity.
At certain zooming level the arc painted is smaller than the shape one.
I use the some value for both the paint and shape method.
The only difference is that for the shape I use the painterPath.arcTo and for the paint i use the painter.drawArc

shape1.JPGshape2.JPG

def arcRect(self):    
        return QtCore.QRectF(self.xc,
                             self.yc,
                             self.h,
                             self.h)
 
 
    def drawShape(self, painterPath):    
        """
            called from  shape method 
        """
        r=self.h/2.0
        x=r*math.cos(self.sa)
        y=r*math.sin(self.sa)
        xc, yc=self.center
        x=xc+x
        y=(yc+y)*-1.0
        painterPath.moveTo(x, y)
        painterPath.arcTo(self.arcRect(),self.startAngle/16.0,self.spanAngle/16.0) 
        #painterPath.moveTo(x, y)
        #painterPath.addRect(self.arcRect())
 
    def drawGeometry(self, painter, option, widget):
        """
            called from the paint method
        """
        #Create Arc/Circle
 
        painter.drawArc(self.xc,self.yc ,self.h ,self.h ,self.startAngle,  self.spanAngle)

def arcRect(self):    
        return QtCore.QRectF(self.xc,
                             self.yc,
                             self.h,
                             self.h)

    
    def drawShape(self, painterPath):    
        """
            called from  shape method 
        """
        r=self.h/2.0
        x=r*math.cos(self.sa)
        y=r*math.sin(self.sa)
        xc, yc=self.center
        x=xc+x
        y=(yc+y)*-1.0
        painterPath.moveTo(x, y)
        painterPath.arcTo(self.arcRect(),self.startAngle/16.0,self.spanAngle/16.0) 
        #painterPath.moveTo(x, y)
        #painterPath.addRect(self.arcRect())
    
    def drawGeometry(self, painter, option, widget):
        """
            called from the paint method
        """
        #Create Arc/Circle
        
        painter.drawArc(self.xc,self.yc ,self.h ,self.h ,self.startAngle,  self.spanAngle)

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is it a qt Bug or I did something wrong ?
Regards,
Matteo

[matteo.boscolo]

Solved ..

In may code the arc whose created with this code :

painter.drawArc(self.xc,self.yc ,self.h ,self.h ,self.startAngle,  self.spanAngle)

painter.drawArc(self.xc,self.yc ,self.h ,self.h ,self.startAngle,  self.spanAngle)

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this accept only integer so the self.xc self.yc where double ..

I change the code as follow:

painter.drawArc(self.arcRect(),self.startAngle,  self.spanAngle)

painter.drawArc(self.arcRect(),self.startAngle,  self.spanAngle)

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where self.arcRect() is a QRectF
I hope this helps someone

Regards,
Matteo