Python 防止多个顶级打开?
我有一个面向对象的tkinter程序。 我已经初始化了一个变量,将Python 防止多个顶级打开?,python,python-3.x,tkinter,Python,Python 3.x,Tkinter,我有一个面向对象的tkinter程序。 我已经初始化了一个变量,将Toplevel()存储为 self.toplevel = None 然后,当我创建实际的Toplevel窗口时,我只需将其分配给变量: self.toplevel = Toplevel() 问题是……当关闭Toplevel()窗口时,该值仍保留在变量self.Toplevel中。如何在关闭窗口后将变量重置为无,以便执行检查: if (self.toplevel == None): self.toplevel = To
Toplevel()
存储为
self.toplevel = None
然后,当我创建实际的Toplevel
窗口时,我只需将其分配给变量:
self.toplevel = Toplevel()
问题是……当关闭Toplevel()
窗口时,该值仍保留在变量self.Toplevel
中。如何在关闭窗口后将变量重置为无,以便执行检查:
if (self.toplevel == None):
self.toplevel = Toplevel()
或者是否有其他方法防止多个Toplevel
窗口打开?检查此项
在toplevel
关闭后,使用回调函数TopCloses
将值None
分配给self.toplevel
。为此,在GUI类中编写一个方法来访问toplevel
属性,并在回调函数中将其值设置为None
在你的主要节目中
def TopCloses():
top.destroy()
#Call the setTopLevel method and assign the attribute toplevel value None
guiObject.setTopLevel(None)
top.protocol("WM_DELETE_WINDOW", TopCloses)
root.mainloop()
检查这个
在toplevel
关闭后,使用回调函数TopCloses
将值None
分配给self.toplevel
。为此,在GUI类中编写一个方法来访问toplevel
属性,并在回调函数中将其值设置为None
在你的主要节目中
def TopCloses():
top.destroy()
#Call the setTopLevel method and assign the attribute toplevel value None
guiObject.setTopLevel(None)
top.protocol("WM_DELETE_WINDOW", TopCloses)
root.mainloop()
检查这个
在toplevel
关闭后,使用回调函数TopCloses
将值None
分配给self.toplevel
。为此,在GUI类中编写一个方法来访问toplevel
属性,并在回调函数中将其值设置为None
在你的主要节目中
def TopCloses():
top.destroy()
#Call the setTopLevel method and assign the attribute toplevel value None
guiObject.setTopLevel(None)
top.protocol("WM_DELETE_WINDOW", TopCloses)
root.mainloop()
检查这个
在toplevel
关闭后,使用回调函数TopCloses
将值None
分配给self.toplevel
。为此,在GUI类中编写一个方法来访问toplevel
属性,并在回调函数中将其值设置为None
在你的主要节目中
def TopCloses():
top.destroy()
#Call the setTopLevel method and assign the attribute toplevel value None
guiObject.setTopLevel(None)
top.protocol("WM_DELETE_WINDOW", TopCloses)
root.mainloop()
以下是我的解决方案:
#somewhere in __init__ make
self.window = None
#I took this piece of code from my bigger app and I have a function
#self.makevariables(), which is called in init, which contains the line above.
def instructions(self):
if self.window == None: #here I check whether it exists, if not make it, else give focus to ok button which can close it
self.window = Toplevel(takefocus = True)
#some optional options lol
self.window.geometry("200x200")
self.window.resizable(0, 0)
#widgets in the toplevel
Label(self.window, text = "NOPE").pack()
self.window.protocol("WM_DELETE_WINDOW", self.windowclosed) #this overrides the default behavior when you press the X in windows and calls a function
self.okbutton = Button(self.window, text = "Ok", command = self.windowclosed, padx = 25, pady = 5)
self.okbutton.pack()
self.okbutton.focus()
self.okbutton.bind("<Return>", lambda event = None:self.windowclosed())
else:
self.okbutton.focus() #You dont need to give focus to a widget in the TopLevel, you can give the focus to the TopLevel, depending how you want it
#self.window.focus() works too
def windowclosed(self): #function to call when TopLevel is removed
self.window.destroy()
self.window = None
#在某个地方
self.window=None
#我从我更大的应用程序中获取了这段代码,我有一个函数
#self.makevariables(),它在init中调用,init包含上面的行。
def说明(自我):
如果self.window==None:#这里我检查它是否存在,如果不存在,则将焦点交给ok按钮,该按钮可以关闭它
self.window=Toplevel(takefocus=True)
#一些可选选项lol
自窗口几何(“200x200”)
self.window.reshable(0,0)
#顶层的小部件
标签(self.window,text=“NOPE”).pack()
self.window.protocol(“WM_DELETE_window”,self.windowclosed)#当您在windows中按X键并调用函数时,这会覆盖默认行为
self.okbutton=Button(self.window,text=“Ok”,command=self.windowclosed,padx=25,pady=5)
self.okbutton.pack()
self.okbutton.focus()
self.okbutton.bind(“,lambda event=None:self.windowclosed())
其他:
self.okbutton.focus()#您不需要将焦点交给顶级中的小部件,您可以根据需要将焦点交给顶级
#self.window.focus()也可以工作
def windowclosed(self):#删除TopLevel时调用的函数
self.window.destroy()
self.window=None
以下是我的解决方案:
#somewhere in __init__ make
self.window = None
#I took this piece of code from my bigger app and I have a function
#self.makevariables(), which is called in init, which contains the line above.
def instructions(self):
if self.window == None: #here I check whether it exists, if not make it, else give focus to ok button which can close it
self.window = Toplevel(takefocus = True)
#some optional options lol
self.window.geometry("200x200")
self.window.resizable(0, 0)
#widgets in the toplevel
Label(self.window, text = "NOPE").pack()
self.window.protocol("WM_DELETE_WINDOW", self.windowclosed) #this overrides the default behavior when you press the X in windows and calls a function
self.okbutton = Button(self.window, text = "Ok", command = self.windowclosed, padx = 25, pady = 5)
self.okbutton.pack()
self.okbutton.focus()
self.okbutton.bind("<Return>", lambda event = None:self.windowclosed())
else:
self.okbutton.focus() #You dont need to give focus to a widget in the TopLevel, you can give the focus to the TopLevel, depending how you want it
#self.window.focus() works too
def windowclosed(self): #function to call when TopLevel is removed
self.window.destroy()
self.window = None
#在某个地方
self.window=None
#我从我更大的应用程序中获取了这段代码,我有一个函数
#self.makevariables(),它在init中调用,init包含上面的行。
def说明(自我):
如果self.window==None:#这里我检查它是否存在,如果不存在,则将焦点交给ok按钮,该按钮可以关闭它
self.window=Toplevel(takefocus=True)
#一些可选选项lol
自窗口几何(“200x200”)
self.window.reshable(0,0)
#顶层的小部件
标签(self.window,text=“NOPE”).pack()
self.window.protocol(“WM_DELETE_window”,self.windowclosed)#当您在windows中按X键并调用函数时,这会覆盖默认行为
self.okbutton=Button(self.window,text=“Ok”,command=self.windowclosed,padx=25,pady=5)
self.okbutton.pack()
self.okbutton.focus()
self.okbutton.bind(“,lambda event=None:self.windowclosed())
其他:
self.okbutton.focus()#您不需要将焦点交给顶级中的小部件,您可以根据需要将焦点交给顶级
#self.window.focus()也可以工作
def windowclosed(self):#删除TopLevel时调用的函数
self.window.destroy()
self.window=None
以下是我的解决方案:
#somewhere in __init__ make
self.window = None
#I took this piece of code from my bigger app and I have a function
#self.makevariables(), which is called in init, which contains the line above.
def instructions(self):
if self.window == None: #here I check whether it exists, if not make it, else give focus to ok button which can close it
self.window = Toplevel(takefocus = True)
#some optional options lol
self.window.geometry("200x200")
self.window.resizable(0, 0)
#widgets in the toplevel
Label(self.window, text = "NOPE").pack()
self.window.protocol("WM_DELETE_WINDOW", self.windowclosed) #this overrides the default behavior when you press the X in windows and calls a function
self.okbutton = Button(self.window, text = "Ok", command = self.windowclosed, padx = 25, pady = 5)
self.okbutton.pack()
self.okbutton.focus()
self.okbutton.bind("<Return>", lambda event = None:self.windowclosed())
else:
self.okbutton.focus() #You dont need to give focus to a widget in the TopLevel, you can give the focus to the TopLevel, depending how you want it
#self.window.focus() works too
def windowclosed(self): #function to call when TopLevel is removed
self.window.destroy()
self.window = None
#在某个地方
self.window=None
#我从我更大的应用程序中获取了这段代码,我有一个函数
#self.makevariables(),它在init中调用,init包含上面的行。
def说明(自我):
如果self.window==None:#这里我检查它是否存在,如果不存在,则将焦点交给ok按钮,该按钮可以关闭它
self.window=Toplevel(takefocus=True)
#一些可选选项lol
自窗口几何(“200x200”)
self.window.reshable(0,0)
#顶层的小部件
标签(self.window,text=“NOPE”).pack()
self.window.protocol(“WM_DELETE_window”,self.windowclosed)#当您在windows中按X键并调用函数时,这会覆盖默认行为
self.okbutton=Button(self.window,text=“Ok”,command=self.windowclosed,padx=25,pady=5)
self.okbutton.pack()
self.okbutton.focus()
self.okbutton.bind(“,lambda event=None:self.windowclosed())
其他:
self.okbutton.focus()#您不需要将焦点交给顶级中的小部件,您可以根据需要将焦点交给顶级
#赛尔夫·温多