Question

我已经定义了一个带有'bpm'属性的类：

class Section:
    def __init__(self, id, bpm, bars, reps, num_tracks):
        self.id = id
        self.bpm = bpm
        self.bars = bars
        self.reps = reps
        self.num_tracks = num_tracks

然后我调用该属性将其用作spinbox上的textvariable参数，一旦我在字典中创建了我的Section类的实例：

def add_section():
    new_id = next(itertools.count(1))
    sections[new_id] = Section(new_id, 120, 1, 2, 1)
    print((str(sections[new_id].bpm)))

    sections[new_id].label_section_title = Label(root, text="Section {}".format(sections[new_id].id, relief = GROOVE))
    sections[new_id].label_section_title.grid(row = 1, column = 4, columnspan = 5)

    sections[new_id].label_bpm = Label(root, text="BPM: ")
    sections[new_id].label_bpm.grid(row = 2, column = 4)

    sections[new_id].bpm_control = Spinbox(root, from_ = 1, to = 999, textvariable = sections[new_id].bpm, command = lambda: sections[new_id].bpm_change(sections[new_id].bpm_control.get()))
    sections[new_id].bpm_control.grid(row = 2, column = 5)

我能够将[new_id] .bpm的值打印为120，所以我知道这有效。

但即使我在spinbox上设置textvariable，我只是在旋转盒上获得值为1，当我希望它是来自新实例的120时。即使我只是将textvariable设置为120，我仍然只有1。

Answer 1

您需要将其设置为IntVar()才能使用

self.bpm = IntVar()
self.bpm.set(bpm) # set value passed in

从旋转框中获取值时，您可以使用Spinbox.get()，它将返回当前值的字符串或self.bpm.get()，这将是一个int值

Tkinter Spinbox textvariable参数无效。我错过了什么吗？

1 个答案: