循环创建的小部件和命令

Question

现在是两个星期，我全职寻找相关问题的解决方案：如何在动态循环中创建命令？主题很简单（想象一下我采取了食物元素）：为了启动程序，我有许多包来确定（例如5，然后按回车）。然后，感谢创建的Comboboxes，针对每种情况，指定它是水果，蔬菜还是其他。每个Combobox的目的是再次创建一个适合执行值的Widget。问题是当执行Bind时，循环适用于整个序列并复制前部小部件。可以通过在第48行添加指令来解决问题，例如：

if 'Selection'.get() == self.Combo_Food_liste[i]:  

但我寻找'选择'意味着对象我无法达到它！或者如果你有更好的想法，我会很高兴知道它！

谢谢!!

from ttk    import *
from Tkinter import *



class Postproc:
    def __init__(self, parent, title):
        self.variable_Title_Frame = []
        self.variable_Title =[]
        self.Combo_Food_Select=[]
        self.Combo_Food_stock=[]
        self.Combo_Food_liste=[]
        self.Combo_Food_Pos_Select={}
        self.Combo_Food_Pos_stock={}
        self.Combo_Food_Pos_liste={}
        self.Combo_Food_Pos_Entry={}
        self.parent = parent
        self.parent.title(title)
        self.parent.protocol("WM_DELETE_WINDOW", self.Closes)

        Frame1 = Frame(self.parent,borderwidth=.5,relief=GROOVE)
        Frame1.pack(side=LEFT,padx=1,pady=1)
        ### Define the number of packs then press 'Enter'
        self.variables_Title_number=IntVar()        
        self.Field_Ouputs = Entry(Frame1, textvariable=self.variables_Title_number, bg ='bisque', fg='maroon')
        self.Field_Ouputs.pack(side=LEFT,padx=1,pady=1)
        self.Field_Ouputs.bind("<Return>", self.Launch_Outputs)
    def Closes(self, event=None):
        self.parent.destroy()
    def Launch_Outputs(self, event=None):
        self.Nombr = self.variables_Title_number.get()
        self.Create_Outputs(self.Nombr)
    def Create_Outputs(self, Nombr):
        #### Define for each pack the kind of food
        for i in range (0,Nombr):            
         self.variable_Title_Frame.append(Frame(MainWin,borderwidth=.5,relief=GROOVE))
         self.variable_Title_Frame[i].pack(side= LEFT,expand=YES)
         Label(self.variable_Title_Frame[i],text=i).pack(padx=1,pady=1)      
         self.Combo_Food_Select.append(StringVar())
         self.Combo_Food_stock.append(('Fruit', 'Vegetable', 'Other'))
         self.Combo_Food_liste.append(Combobox(self.variable_Title_Frame[i], textvariable = self.Combo_Food_Select[i], \
            values = self.Combo_Food_stock[i], state = 'readonly'))
         self.Combo_Food_liste[i].bind("<<ComboboxSelected>>", self.Position_Magnitude)
         self.Combo_Food_liste[i].pack()
    def Position_Magnitude(self, index):
        ##### Define for each kind the variety 
        for i in range (0, self.Nombr):

          if self.Combo_Food_liste[i].get() == 'Fruit':             
             self.Combo_Food_Pos_Select[i]=(StringVar())
             self.Combo_Food_Pos_stock[i]=(['Apple', 'Orange'])
             self.Combo_Food_Pos_liste[i]=(Combobox(self.variable_Title_Frame[i], textvariable = self.Combo_Food_Pos_Select[i], \
                                                values = self.Combo_Food_Pos_stock[i], state = 'readonly'))
             self.Combo_Food_Pos_liste[i].pack(side=BOTTOM)
          if self.Combo_Food_liste[i].get() == 'Vegetable':             
             self.Combo_Food_Pos_Select[i]=(StringVar())
             self.Combo_Food_Pos_stock[i]=(['Tomatoe', 'Pepper', 'Peas'])
             self.Combo_Food_Pos_liste[i]=(Combobox(self.variable_Title_Frame[i], textvariable = self.Combo_Food_Pos_Select[i], \
                                                values = self.Combo_Food_Pos_stock[i], state = 'readonly'))
             self.Combo_Food_Pos_liste[i].pack(side=BOTTOM)
          if self.Combo_Food_liste[i].get() == 'Other':
             self.Combo_Food_Pos_Select[i]=(StringVar())
             self.Combo_Food_Pos_Entry[i]=Entry(self.variable_Title_Frame[i], textvariable=self.Combo_Food_Pos_Select[i], bg ='bisque', fg='maroon')
             self.Combo_Food_Pos_Select[i].set("Specify")
             self.Combo_Food_Pos_Entry[i].pack(side=BOTTOM)            
          if self.Combo_Food_liste[i].get() == "":
             next

if __name__ == '__main__':    
    MainWin = Tk()
    app = Postproc(MainWin, "Main Window") 
    MainWin.mainloop()

Answer 1

您可以使用lambda功能将i发送至Position_Magnitude()

self.Combo_Food_liste[i].bind("<<ComboboxSelected>>", lambda event, index=i:self.Position_Magnitude(event,index))

在Position_Magnitude中，您可以使用event.widget代替self.Combo_Food_liste[i]

from ttk    import *
from Tkinter import *



class Postproc:
    def __init__(self, parent, title):

        self.variable_Title_Frame = []
        self.variable_Title =[]
        self.Combo_Food_Select=[]
        self.Combo_Food_stock=[]
        self.Combo_Food_liste=[]
        self.Combo_Food_Pos_Select={}
        self.Combo_Food_Pos_stock={}
        self.Combo_Food_Pos_liste={}
        self.Combo_Food_Pos_Entry={}
        self.parent = parent
        self.parent.title(title)
        self.parent.protocol("WM_DELETE_WINDOW", self.Closes)

        Frame1 = Frame(self.parent,borderwidth=.5,relief=GROOVE)
        Frame1.pack(side=LEFT,padx=1,pady=1)

        ### Define the number of packs then press 'Enter'
        self.variables_Title_number=IntVar()        
        self.Field_Ouputs = Entry(Frame1, textvariable=self.variables_Title_number, bg ='bisque', fg='maroon')
        self.Field_Ouputs.pack(side=LEFT,padx=1,pady=1)
        self.Field_Ouputs.bind("<Return>", self.Launch_Outputs)

    def Closes(self, event=None):
        self.parent.destroy()

    def Launch_Outputs(self, event=None):
        self.Nombr = self.variables_Title_number.get()
        self.Create_Outputs(self.Nombr)

    def Create_Outputs(self, Nombr):
        #### Define for each pack the kind of food
        for i in range(Nombr):            
             self.variable_Title_Frame.append(Frame(MainWin,borderwidth=.5,relief=GROOVE))
             self.variable_Title_Frame[i].pack(side= LEFT,expand=YES)

             Label(self.variable_Title_Frame[i],text=i).pack(padx=1,pady=1)      

             self.Combo_Food_Select.append(StringVar())
             self.Combo_Food_stock.append(('Fruit', 'Vegetable', 'Other'))
             self.Combo_Food_liste.append(Combobox(self.variable_Title_Frame[i], textvariable = self.Combo_Food_Select[i], \
                values = self.Combo_Food_stock[i], state = 'readonly'))
             self.Combo_Food_liste[i].bind("<<ComboboxSelected>>", lambda event, index=i:self.Position_Magnitude(event,index))
             self.Combo_Food_liste[i].pack()

    def Position_Magnitude(self, event, index):
        #print event.widget, index

        if event.widget.get() == 'Fruit':             
         self.Combo_Food_Pos_Select[index]=(StringVar())
         self.Combo_Food_Pos_stock[index]=(['Apple', 'Orange'])
         self.Combo_Food_Pos_liste[index]=(Combobox(self.variable_Title_Frame[index], textvariable = self.Combo_Food_Pos_Select[index], \
                                            values = self.Combo_Food_Pos_stock[index], state = 'readonly'))
         self.Combo_Food_Pos_liste[index].pack(side=BOTTOM)

        if event.widget.get() == 'Vegetable':             
         self.Combo_Food_Pos_Select[index]=(StringVar())
         self.Combo_Food_Pos_stock[index]=(['Tomatoe', 'Pepper', 'Peas'])
         self.Combo_Food_Pos_liste[index]=(Combobox(self.variable_Title_Frame[index], textvariable = self.Combo_Food_Pos_Select[index], \
                                            values = self.Combo_Food_Pos_stock[index], state = 'readonly'))
         self.Combo_Food_Pos_liste[index].pack(side=BOTTOM)

        if event.widget.get() == 'Other':
         self.Combo_Food_Pos_Select[index]=(StringVar())
         self.Combo_Food_Pos_Entry[index]=Entry(self.variable_Title_Frame[index], textvariable=self.Combo_Food_Pos_Select[index], bg ='bisque', fg='maroon')
         self.Combo_Food_Pos_Select[index].set("Specify")
         self.Combo_Food_Pos_Entry[index].pack(side=BOTTOM)            

        if event.widget.get() == "":
         next

if __name__ == '__main__':    
    MainWin = Tk()
    app = Postproc(MainWin, "Main Window") 
    MainWin.mainloop()

---

修改

<顺便说一下：如果你在顶部组合框中选择新东西，你必须删除旧的组合框/条目

def Position_Magnitude(self, event, index):
    #print event.widget, index

    try:
        if self.Combo_Food_Pos_liste[index]:
            self.Combo_Food_Pos_liste[index].pack_forget()
    except:
        pass

    try:
        if self.Combo_Food_Pos_Entry[index]:
            self.Combo_Food_Pos_Entry[index].pack_forget()          
    except:
        pass

    if event.widget.get() == 'Fruit':             
     self.Combo_Food_Pos_Select[index]=(StringVar())
     self.Combo_Food_Pos_stock[index]=(['Apple', 'Orange'])
     self.Combo_Food_Pos_liste[index]=(Combobox(self.variable_Title_Frame[index], textvariable = self.Combo_Food_Pos_Select[index], \
                                        values = self.Combo_Food_Pos_stock[index], state = 'readonly'))
     self.Combo_Food_Pos_liste[index].pack(side=BOTTOM)

    if event.widget.get() == 'Vegetable':             
     self.Combo_Food_Pos_Select[index]=(StringVar())
     self.Combo_Food_Pos_stock[index]=(['Tomatoe', 'Pepper', 'Peas'])
     self.Combo_Food_Pos_liste[index]=(Combobox(self.variable_Title_Frame[index], textvariable = self.Combo_Food_Pos_Select[index], \
                                        values = self.Combo_Food_Pos_stock[index], state = 'readonly'))
     self.Combo_Food_Pos_liste[index].pack(side=BOTTOM)

    if event.widget.get() == 'Other':
     self.Combo_Food_Pos_Select[index]=(StringVar())
     self.Combo_Food_Pos_Entry[index]=Entry(self.variable_Title_Frame[index], textvariable=self.Combo_Food_Pos_Select[index], bg ='bisque', fg='maroon')
     self.Combo_Food_Pos_Select[index].set("Specify")
     self.Combo_Food_Pos_Entry[index].pack(side=BOTTOM)            

    if event.widget.get() == "":
     next