def calculatePosition( self, e ):
# only needs x_move here as y is calculated dependently on x
x_move = e.pos().x() - self.xOnWidget
p = CST.toCcsCoord( self.ccs, self.x, self.y, self,
self.parent )
x = p.x() + x_move
p = CST.fromCcsCoord( self.ccs, x, 0, self, self.parent )
self.x = p.x()
self.setPosition()
def calculatePosition(self, e):
"""Calculates its position after a move. Can easily
overwritten by subclasses to get different behaviour"""
# these calculations are in widget coordinates.
x_move = e.pos().x() - self.xOnWidget
y_move = e.pos().y() - self.yOnWidget
p = CST.toCcsCoord( self.ccs, self.x, self.y, self, self.parent )
x = p.x() + x_move
y = p.y() + y_move
self.setPos(QPointF(x, y))
# self.x and self.y need to be adjusted, too.
p = CST.fromCcsCoord( self.ccs, x,y, self, self.parent )
self.x = p.x()
self.y = p.y()
