由Tkinter中的列表框和单选按钮触发的事件 [英] Event triggered by Listbox and Radiobutton in Tkinter

问题描述

我想创建一个由列表框"选定项的更改或单选按钮"选定项的更改触发的事件.是否可以?我使用以下代码:

I want to make an event that is triggered by either a change in List box selected item or a change in Radio button selected item. Is it possible? I use this code:

def getScript(event):
    state = rb.get()
    listScript = []
    processor = ()
    processor = lb1.get(lb1.curselection())
    if processor :
        if (state == 1):
            print processor
        if (state == 2):
            pass
        if (state == 3):
            pass


frame2 = Frame(top)
frame2.pack(fill = X)
rb = IntVar()

R1 = Radiobutton(frame2, text = "Parallel Test", 
                 variable = rb, value = 1, command = getScript)
R2 = Radiobutton(frame2, text = "Non Parallel Test", 
                 variable = rb, value = 2, command = getScript)
R3 = Radiobutton(frame2, text = "Specific Test", 
                 variable = rb, value = 3, command = getScript)

R1.grid(row = 0, column = 0, padx = 10)
R2.grid(row = 0, column = 1, padx = 10)
R3.grid(row = 0, column = 2, padx = 10)

frame3 = Frame(top)
frame3.pack(fill = X)
space_frame3 = Frame(frame3, width = 10)
l5 = Label(frame3, text = "Processor Unit")
l6 = Label(frame3, text = "Script for test")
lb1 = Listbox(frame3, height = 7, exportselection = 0)
lb1.bind('<<ListboxSelect>>',getScript)
scrollbar = Scrollbar(frame3)
lb2 = Listbox(frame3, height = 7, width = 40, 
              yscrollcommand = scrollbar.set, exportselection = 0)

只要我在列表框"中选择一个项目之前选择了一个单选按钮，一切就可以正常进行.但是每次我选择另一个单选按钮时，它都会返回:

Everything goes fine as long as I've selected a radiobutton before selecting an item in Listbox. But every time I select another radio button, it return:

TypeError: getScript() takes exactly 1 argument (0 given)

推荐答案

选择单选按钮时会发生以下情况:

What happen when you select a Radiobutton is :

1)将intVar rb 设置为按钮值

1) The intVar rb is set to the button value

2)调用命令getScript.

2) The command getScript is called.

但是，单选按钮选择不会生成任何事件，因此在这种情况下有两个选项:

But, a Radiobutton selection do not generates any event, that's why there is 2 options in this case :

使用lambda函数调用该函数以提供一个参数，因为您的命令 getScript 需要一个参数(这就是错误消息).

Call the function using a lambda function to provide a parameter as your command getScript expect one parameter ( that's the error message ).

R1 = Radiobutton(frame2, text = "Parallel Test",
                 variable = rb, value = 1,
                 command = lambda : getScript(None) )

另一个选择是-似乎您的目标是知道选择了哪个小部件-使用这样的命令:

An other option is - as it seem that your aim is to know what widget was selected - to use such a command:

R1 = Radiobutton(frame2, text = "Parallel Test",
                 variable = rb, value = 1,
                 command = lambda : getScript(R1) )

使用带有小部件的 getSript 函数.像这样:

with your getSript function that takes a widget. Like this:

def getSript(widget):
    print widget["text"]

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