lab5.py 文件源码

def add_point(point):
    global w
    if w.point_now is None:
        w.point_now = point
        w.point_lock = point
        add_row(w)
        i = w.table.rowCount() - 1
        item_x = QTableWidgetItem("{0}".format(point.x()))
        item_y = QTableWidgetItem("{0}".format(point.y()))
        w.table.setItem(i, 0, item_x)
        w.table.setItem(i, 1, item_y)
    else:
        w.edges.append([w.point_now.x(), w.point_now.y(),
                        point.x(), point.y()])
        w.point_now = point
        add_row(w)
        i = w.table.rowCount() - 1
        item_x = QTableWidgetItem("{0}".format(point.x()))
        item_y = QTableWidgetItem("{0}".format(point.y()))
        w.table.setItem(i, 0, item_x)
        w.table.setItem(i, 1, item_y)
        item_x = w.table.item(i-1, 0)
        item_y = w.table.item(i-1, 1)
        w.scene.addLine(point.x(), point.y(), float(item_x.text()), float(item_y.text()), w.pen)
    #print(w.edges)