how to use mouse move event to drag curves on QGraphicsScene?

[sarbh20ss]

hey I am drawing a bezier curve on QGraphicsScene.
Initialy I was drawing curve using path and drawing it in pixmap and then adding pixmap to scene.
This allows me to add multiple paths to scene through pixmap.

drawGlyphs=new QPixmap(800, 800);
drawGlyphs->fill(Qt::white);
QPainter p(drawGlyphs);
p.setViewport(50,200,400,400);
p.setPen(Qt::black);
p.drawPath(mypath);
pScene->addPixmap(*drawGlyphs);

drawGlyphs=new QPixmap(800, 800);
drawGlyphs->fill(Qt::white);
QPainter p(drawGlyphs);
p.setViewport(50,200,400,400);
p.setPen(Qt::black);
p.drawPath(mypath);
pScene->addPixmap(*drawGlyphs);

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I wanted to check if the mouse click is on one of the paths. But with above structure I couldn't do that.
So I subclass QGraphicsPathItem.

class mySubClass1 : public QGraphicsPathItem
{
public:
    mySubClass1();
protected:
    void mousePressEvent(QGraphicsSceneMouseEvent *event);
}

class mySubClass1 : public QGraphicsPathItem
{
public:
    mySubClass1();
protected:
    void mousePressEvent(QGraphicsSceneMouseEvent *event);
}

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Here I am drawing curve in painter path, setting this path to object of 'mySubClass1' and adding this object as item to scene.
Now when I try to implement mouse move event I could not detect on which point which is on the curve I clicked and trying to drag.

How do I solve this problem?
Is the structure of my program correct?