InfiniteLine.py 文件源码

def mouseDragEvent(self, ev):
        if self.movable and ev.button() == QtCore.Qt.LeftButton:
            if ev.isStart():
                self._moving = True
                self._cursorOffset = self._posToRel(ev.buttonDownPos())
                self._startPosition = self.orthoPos
            ev.accept()

            if not self._moving:
                return

            rel = self._posToRel(ev.pos())
            self.orthoPos = np.clip(self._startPosition + rel - self._cursorOffset, 0, 1)
            self.updatePosition()
            if ev.isFinish():
                self._moving = False