Unable to make a simple selection rectangle by taking rect between two points.... all day!

enjoysmath

class SelectionRect(QGraphicsRectItem):
    def __init__(self, scene, parent=None):
        QGraphicsRectItem.__init__(self, parent)
        self.setBrush(QBrush(Qt.NoBrush))
        self.viewScaleX = 1.0
        self.viewScaleY = 1.0
        scene.addItem(self)
        self.setPen(self.createPen())
        self.setVisible(False)
        self.setZValue(sys.float_info.max)
        
    def setCorners(self, p1, p0=None):
        if p0 == None:
            p0 = self.pos()
        rect = rectThroughPoints(p0, p1)
        self.setPos(rect.topLeft())
        self.setRect(QRectF(0, 0, rect.width(), rect.height()))

I use setCorners to position the selection rect every mouse move event in a qgraphicsscene.

the behavior is it's working for everything but moving the edges of the selection rectangle up or left

enjoysmath

@enjoysmath Found it, up or left self.pos() is no longer the appropriate corner

SGaist

Hi,

Glad you found out and thanks for sharing !

Since you have it working now, please mark the thread as solved using the "Topic Tools" button so that other forum users may know a solution has been found :)

Unsolved Unable to make a simple selection rectangle by taking rect between two points.... all day!