#Closing in a window code#
#Closing in a window windows#

#Closing in a window code#

After that the interaction trigger is invoked and triggers the code in the view model via the Relaењњommand. In this approach the the closing event is triggered first. In this example I subscribed to the closing event, but it is always cancelled private void OnClosing(object sender, CancelEventArgs e)ДЄnd finally in the view model public ICommand Close On the other hand Torpederos answer is a bit complicated for only close cancellation. I'm not an MVVM expert, but in my opinion Yusufs' answer isn't quite MVVM. Answer: To close a window that you previously opened from your script, you can use the window.close() method, for example: winRef.close(). OR, if triggering dialog via view-model:Д«ool shouldClose = ((MyViewModel) DataContext).Trењњlose() Var result = MessageBox.Show('Really close?', 'Warning', MessageBoxButton.YesNo) To cancel closing of a window you can subscribe to the Closing event of view and set CancelEventArgs.Cancel to true after showing a MessageBox.Д¬ode behind: private void OnClosing(object sender, CancelEventArgs e) Let your View class to handle the closing request and whether it should be canceled or not. Malan would say on CS50, вЂњThereВґs always a tradeoffвЂќ.You are trying to do View's work in ViewModel class. It sure frees up the object reference from memory, but it has the additional cost of the re-instantiation, and that is processing time.Д«ut as David J.

#Closing in a window windows#

Maybe if you have a program that runs for long periods of time and opens a lot of windows it can be handy to avoid stackoverflow or heapoverflow. destroy() and re-instantiate approach is more efficient than the. # Decreasses the reference count on the Parent Widget so the Garbage Collector can destroy the python object The Parent Widget that created the new Window, so the Garbage Collector can collect it. To also destroy the object, you need to set all of its references count to ZERO on The destroy() method gets rid of the widget part, but leaves the object in memory. '''Tkinter widgets are made of two parts.

Self.button_close = tk.Button(self, text = 'Close', width = 25, command = self.close_me) Self.button_dummy = tk.Button(self, text = 'Do the thing', width = 25, command = lambda : print('Button pressed on window!')) # Stores reference to the Parent Widget, so you can set parent.new_window = None '''Opens a new parent - tk.Widget that opens/reference this window Self.new_window = self.new_window if self.new_window else Window(parent) Technological innovation and the decreasing costs of wireless and other.

''' If window exists, return it, else, create it''' Self.button_new_id(row = 2, column = 2, padx=5, pady=5) Self.button_new_window = tk.Button(self, text = 'New Window', command = lambda : self.get_window(self)) HereВґs a working example: import tkinter as tkДef _init_(self, master, *args, **kwargs): I donВґt think having two loggin windows opened or two equal options window makes sense.Дўnd Bonus: It is possible to close the window from other parts of the code, as in a MVC patter, the Controller can close the window after doing some processing. You wonВґt get more than 1 New_Window on the screen. Then you can set the Parent Reference to the New_Window to None, from within the child Widget _window = None in a close_me() method right after you call stroy() on the New_Window:ДЎst Bonus: this code prevents the opening of more than 1 instance of a Window at a time. YouВґll have a two way reference: Parent knows child and child knows parent. If you took an OOP approach, you can pass a reference to the Parent Widget as argument to the New_Window and store it in a class attribute.