pmItem = QGraphicsPixmapItem(pm, None, self.scene)
pmItem.setAcceptHoverEvents(True)
pmItem.hoverMoveEvent = self.pixelSelect
pmItem.hoverLeaveEvent = self.hover_leave

def pixelSelect(self, event):
        for l in self.v_dist_lines:
            self.scene.removeItem(l)
        self.v_dist_lines = []
        for l in self.h_dist_lines:
            self.scene.removeItem(l)
        self.h_dist_lines = []
        for t in self.txt_dist_list:
            self.scene.removeItem(t)
        self.txt_dist_list = []

        position = QtCore.QPoint(event.pos().x(), event.pos().y())
        closest_h_line, closest_v_line = None, None
        dist_h, dist_v = self.scene_h, self.scene_w
        for l in self.h_lines_list:
            diff = math.fabs(position.y() - l.line().y1())
            if diff < dist_h:
                dist_h = diff
                closest_h_line = l

        for l in self.v_lines_list:
            diff = math.fabs(position.x() - l.line().x1())
            if diff < dist_v:
                dist_v = diff
                closest_v_line = l

        diff_h = round(float(dist_h) / QX11Info.appDpiY() * self.in2cm * (self.draw_scale_y / self.hcm), 2)
        diff_v = round(float(dist_v) / QX11Info.appDpiX() * self.in2cm * (self.draw_scale_x / self.wcm), 2)

        # print(diff_h, diff_v)

        result = ''
        if closest_h_line:
            result += 'Distance to nearest horizontal line is {:0.2f} cm'.format(diff_h)
            result += ',t'
            self.drawLine(position.x(), position.y(),
                          position.x(), closest_h_line.line().y1(), self.h_dist_lines)
            txt = QGraphicsTextItem(QtCore.QString('{:0.2f}cm'.format(diff_h)),
                                    scene=self.scene)
            txt_x = position.x() + 10
            y_diff = abs(position.y() - closest_h_line.line().y1()) / 2
            txt_y = position.y() + y_diff if closest_h_line.line().y1() > position.y()
                else position.y() - y_diff
            txt.setPos(QtCore.QPointF(txt_x,
                                      txt_y))
            self.txt_dist_list.append(txt)
        if closest_v_line:
            result += 'Distance to nearest vertical line is {:0.2f} cm'.format(diff_v)
            self.drawLine(position.x(), position.y(),
                          closest_v_line.line().x1(), position.y(), self.v_dist_lines)
            txt = QGraphicsTextItem(QtCore.QString('{:0.2f}cm'.format(diff_v)),
                                    scene=self.scene)
            x_diff = abs(position.x() - closest_v_line.line().x1()) / 2
            txt_x = position.x() + x_diff if closest_h_line.line().x1() > position.x()
                else position.x() - x_diff
            txt_y = position.y() + 10
            txt.setPos(QtCore.QPointF(txt_x,
                                      txt_y))
            self.txt_dist_list.append(txt)

        self.statusBar().showMessage(result)