TkInterを使用してGUIアプリを構築する方法を思い出すのに役立つ参照として、次のコードをさらに思いついた。Button1をクリックするか、コマンドオプションがself.helloに設定されている他のウィジェットを除いて、うまく動作します。以下のコードでわかるように、hello関数はプレースホルダーのようなものです。IDLEを介してスクリプトを実行している間はボタンのクリックは正常に機能しますが、実際のファイルtest.pywをダブルクリックしてプログラムを起動すると、アプリケーションが終了するだけです。私の質問は、なぜですか？
#Some guy somewhere
from tkinter import *
class Application:
def hello(self):
msg = messagebox.showinfo('Message Title','Message Body')
def __init__(self, parent):
parent.resizable(0,0)
parent.minsize(800, 400)
parent.title('Top Level')
# Global Padding pady and padx
pad_x = 0
pad_y = 0
# CASCADE MENU
# create a parent menu.
self.parentmenu1 = Menu(parent, tearoff=0)
#self.menubar1.add_command(label='Menu1', command=self.hello)
#create a child menu for parent menu.
self.parentmenu1_child1 = Menu(parent, tearoff=0)
self.parentmenu1_child1.add_command(label='Item1', command=self.hello)
self.parentmenu1_child1.add_command(label='Item2', command=self.hello)
self.parentmenu1_child1.add_command(label='Item3', command=self.hello)
#add child menu to parent menu.
self.parentmenu1.add_cascade(label='Menu1', menu=self.parentmenu1_child1)
#self.menubar1.add_separator()
# SINGLE MENU
# create a parent menu.
self.parentmenu1.add_command(label='Menu2', command=self.hello)
# SINGLE MENU
# create a parent menu.
self.parentmenu1.add_command(label='Menu3', command=self.hello)
# display the parent menu.
parent.config(menu=self.parentmenu1)
# Create controls
#create label
self.label1 = Label(parent, text='Label1')
#create textbox
self.textbox1 = Entry(parent)
#create button
self.button1 = Button(parent, text='Button1', command=self.hello)
#string variable to hold checkbox1 values.
self.str_checkbox1 = StringVar()
#create checkbox
self.checkbox1 = Checkbutton(parent, text='Checkbox1', variable=self.str_checkbox1, onvalue='on1', offvalue='off1')
#deselect checkbox1
self.checkbox1.deselect()
#string variable to hold checkbox2 values.
self.str_checkbox2 = StringVar()
#create checkbox
self.checkbox2 = Checkbutton(parent, text='Checkbox2', variable=self.str_checkbox2, onvalue='on2', offvalue='off2')
#deselect checkbox2
self.checkbox2.deselect()
#???? ..what sets the groupbox apart from others. primary key???!!
self.str_radiobutton1 = StringVar()
#command= parameter missing.
self.radiobutton1 = Radiobutton(parent, text='Radio 1', variable=self.str_radiobutton1, value='a')
self.radiobutton2 = Radiobutton(parent, text='Radio 2', variable=self.str_radiobutton1, value='b')
self.radiobutton1.select()
#create a list of options.
optionList = ('Option1', 'Option2', 'Option3')
#string variable to hold optionlist values.
self.str_optionmenu1 = StringVar()
#associate string variable with optionlist
self.str_optionmenu1.set(optionList[0])
#create optionmenu
self.optionmenu1 = OptionMenu(parent, self.str_optionmenu1, *optionList)
#create a frame
self.frame1 = Frame(parent)
#create a text.
self.textarea1 = Text(self.frame1, width=20, height=10)
#align text left and fill frame with it.
self.textarea1.pack(side=LEFT, fill=Y)
#create a scrollbar.
self.scrollbar1 = Scrollbar(self.frame1)
#align scrollbar right and fill frame with it.
self.scrollbar1.pack(side=RIGHT, fill=Y)
#what is going to be scrolled?
self.scrollbar1.config(command=self.textarea1.yview)
#set textarea scrollbar.
self.textarea1.config(yscrollcommand=self.scrollbar1.set)
#align frame left and fill.
self.frame1.pack(side=LEFT, fill=Y)
#create a frame
self.frame2 = Frame(parent)
#create a text.
self.listbox1 = Listbox(self.frame2, width=20, height=10, activestyle='none', selectmode=SINGLE)
#create a list of items.
optionList = ('Item1', 'Item2', 'Item3', 'Item4', 'Item5', 'Item6', 'Item7', 'Item8', 'Item9', 'Item10', 'Item11')
#add items from list to listbox
for item in optionList:
self.listbox1.insert(END, item)
#align text left and fill frame with it.
self.listbox1.pack(side=LEFT, fill=Y)
#create a scrollbar.
self.scrollbar2 = Scrollbar(self.frame2)
#align scrollbar right and fill frame with it.
self.scrollbar2.pack(side=RIGHT, fill=Y)
#what is going to be scrolled?
self.scrollbar2.config(command=self.listbox1.yview)
#set textarea scrollbar.
self.listbox1.config(yscrollcommand=self.scrollbar2.set)
#align frame left and fill.
self.frame2.pack(side=LEFT, fill=Y)
# Place controls inside of grid
self.label1.grid(row=0, column=0, padx=pad_x, pady=pad_y, sticky=W)
self.textbox1.grid(row=0, column=1, padx=pad_x, pady=pad_y, sticky=W)
self.button1.grid(row=1, column=0, padx=pad_x, pady=pad_y, sticky=W)
self.checkbox1.grid(row=1, column=1, padx=pad_x, pady=pad_y, sticky=W)
self.checkbox2.grid(row=1, column=2, padx=pad_x, pady=pad_y, sticky=W)
self.optionmenu1.grid(row=2, column=0, padx=pad_x, pady=pad_y, sticky=W)
self.frame1.grid(row=2, column=1, padx=pad_x, pady=pad_y, sticky=W)
self.radiobutton1.grid(row=3, column=0, padx=pad_x, pady=pad_y, sticky=W)
self.radiobutton2.grid(row=3, column=1, padx=pad_x, pady=pad_y, sticky=W)
self.frame2.grid(row=4, column=0, padx=pad_x, pady=pad_y, sticky=W)
if __name__ == '__main__':
parent = Tk()
app = Application(parent)
parent.mainloop()