具有多个选择返回字符串值的组合框

Question

我想要 2 个多重选择组合框返回/显示列表的值。我的代码看起来像这样：

data = [[],[]]
nom = [[],[]]
data[0] = [['01_Flat', '02_Curv', '03_RX', '04_RY', '05_RZ', '06_Fsyr', '07_AI']]
data[1] = [['Manual', 'Laser', 'Gamma', 'Proto']]
nom[0] = ['Part']
nom[1] = ['Cutting']


import tkinter as tk
from tkinter import ttk

class Combo(tk.Frame):
    def __init__(self, parent):
        tk.Frame.__init__(self, parent)

        menubutton = tk.Menubutton(self, text=nom[k][i], 
                                    indicatoron=True, borderwidth=1, relief="raised")
        menu = tk.Menu(menubutton, tearoff=False)
        menubutton.configure(menu=menu)
        menubutton.pack(padx=10, pady=10)

        self.choices = {}
        for choice in (data[k][i]):
            self.choices[choice] = tk.IntVar(value=0)
            # print(self.choices[choice].get())
            #print(self.choices.get())
            menu.add_checkbutton(label=choice, variable=self.choices[choice], 
                                  onvalue=1, offvalue=0,command=self.show)
    def show(self):
        # global selec
        value = []
        for choice in (data[k][i]):
            value.append(self.choices[choice].get())
        print(value)   
        # selec = value
        return value

root = tk.Tk()

canva = tk.Canvas(root, width = 530,height = 500)
canva.pack(fill = "both", expand = True)

i=0 
k = 0

a = Combo(root)
a = canva.create_window(125,50,anchor = "nw",window = a)

i = 0
k = 1

pos = Combo(root)
pos = canva.create_window(225,50,anchor = "nw",window = pos)

root.mainloop()

此代码的很大一部分来自此主题：如何从组合框中启用多个值选择？

目前它适用于第二个组合框，但第一个组合框有错误：

Traceback (most recent call last):
  File "C:\", line 1892, in __call__
    return self.func(*args)
  File "c:dbcreation.py", line 285, in show
    value.append(self.choices[choice].get())
KeyError: 'Manual'

Answer 1

坦率地说，我不知道问题是什么，因为首先我改变了它的工作方式 - 使其更具可读性。

首先，我将所有数据直接放入字典中，而不使用一些

data[0]

或其他变量

nom

data = {
    'Part': ['01_Flat', '02_Curv', '03_RX', '04_RY', '05_RZ', '06_Fsyr', '07_AI'],
    'Cutting': ['Manual', 'Laser', 'Gamma', 'Proto']
}

接下来我显式发送密钥和数据到 Combo

Combo(root, key='Part', data=data['Part'])

后来我使用

self.

将所有元素保留在类中 - 我不访问外部数据。

我使用可读变量

key

而不是

k

class Combo(tk.Frame):

    def __init__(self, parent, key, data):
        tk.Frame.__init__(self, parent)
        
        self.key = key
        self.data = data

        self.menubutton = tk.Menubutton(self, text=self.key, 
                                        indicatoron=True, borderwidth=1, relief="raised")
                                    
        self.menu = tk.Menu(self.menubutton, tearoff=False)
        self.menubutton.configure(menu=self.menu)
        self.menubutton.pack(padx=10, pady=10)

        self.choices = {}
        for item in self.data:
            self.choices[item] = tk.BooleanVar(value=False)
            self.menu.add_checkbutton(label=item, variable=self.choices[item], 
                                  onvalue=True, offvalue=False, command=self.show)

和函数

show()

我也改为使用self.data和

self.choices

def show(self):
    value = [self.choices[item].get() for item in self.data]
    print(value)
    return value

因为这个函数给出了 0,1 的列表（在我的版本中

True

，False`），这是不可读的，所以我创建了仅使用选定元素创建列表的函数

def get_selected(self):
    value = [item for item in self.data if self.choices[item].get() is True ]
    return value

一切工作都没有问题。

---

完整的工作代码：

data = {
    'Part': ['01_Flat', '02_Curv', '03_RX', '04_RY', '05_RZ', '06_Fsyr', '07_AI'],
    'Cutting': ['Manual', 'Laser', 'Gamma', 'Proto']
}

import tkinter as tk
from tkinter import ttk

class Combo(tk.Frame):

    def __init__(self, parent, key, data):
        tk.Frame.__init__(self, parent)
        
        self.key = key
        self.data = data

        self.menubutton = tk.Menubutton(self, text=self.key, 
                                        indicatoron=True, borderwidth=1, relief="raised")
                                    
        self.menu = tk.Menu(self.menubutton, tearoff=False)
        self.menubutton.configure(menu=self.menu)
        self.menubutton.pack(padx=10, pady=10)

        self.choices = {}
        
        for item in self.data:
            self.choices[item] = tk.BooleanVar(value=False)
            self.menu.add_checkbutton(label=item, variable=self.choices[item], 
                                  onvalue=True, offvalue=False, command=self.show)

    def show(self):
        value = [self.choices[item].get() for item in self.data]
        print(value, self.get_selected())
        return value

    def get_selected(self):
        value = [item for item in self.data if self.choices[item].get() is True ]
        return value

def show_all_selections():
    results.delete('0.0', 'end')
    results.insert('end', f'{combo_a.key}: {combo_a.get_selected()}\n')
    results.insert('end', f'{combo_pos.key}: {combo_pos.get_selected()}\n')
    
root = tk.Tk()

canva = tk.Canvas(root, width=530, height=200)
canva.pack(fill="both", expand=True)

combo_a = Combo(root, key='Part', data=data['Part'])
a = canva.create_window(125, 50, anchor="nw", window=combo_a)

combo_pos = Combo(root, key='Cutting', data=data['Cutting'])
pos = canva.create_window(225, 50, anchor="nw", window=combo_pos)

results = tk.Text(root, height=4)
results.pack()

button = tk.Button(root, text="Show all selected", command=show_all_selections)
button.pack()


root.mainloop()