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POCorrect way to implement a custom popup tkinter dialog box
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  1. POCorrect way to implement a custom popup tkinter dialog box
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    copied!<p>I just started learning how to create a custom pop up dialog box; and as it turns out, the <code>tkinter messagebox</code> is really easy to use, but it also does not do too much. Here is my attempt to create a dialog box that will take input and then store that in the username.</p> <p>My question is what is the recommended style to implement this? As Bryan Oakley suggested in <a href="https://stackoverflow.com/questions/10052410/tkinter-button-does-not-appear-on-toplevel#comment12867705_10052410">this comment</a>. </p> <blockquote> <p>I would advise against using a global variable. Instead of having the dialog destroy itself, have it destroy only the actual widget but leave the object alive. Then, call something like <code>inputDialog.get_string()</code> and then <code>del inputDialog</code> from your main logic. </p> </blockquote> <p>Maybe using the global variable to return my string is not the best idea, but why? And what is the suggested way? I get confused because I don't know how to trigger the getstring once the window is destroyed, and... the line about destroying the actual widget, I am not sure if he is referring to <code>TopLevel</code>.</p> <p>The reason I ask is because I want the pop up box to be destroyed after I press the submit button; because after all, I want it to resume back to the main program, update something, etc. What should the button method <code>send</code> do in this case? Because the idea in this particular example is to allow the user to do it over and over, if he desires.</p> <pre><code>import tkinter as tk class MyDialog: def __init__(self, parent): top = self.top = tk.Toplevel(parent) self.myLabel = tk.Label(top, text='Enter your username below') self.myLabel.pack() self.myEntryBox = tk.Entry(top) self.myEntryBox.pack() self.mySubmitButton = tk.Button(top, text='Submit', command=self.send) self.mySubmitButton.pack() def send(self): global username username = self.myEntryBox.get() self.top.destroy() def onClick(): inputDialog = MyDialog(root) root.wait_window(inputDialog.top) print('Username: ', username) username = 'Empty' root = tk.Tk() mainLabel = tk.Label(root, text='Example for pop up input box') mainLabel.pack() mainButton = tk.Button(root, text='Click me', command=onClick) mainButton.pack() root.mainloop() </code></pre>
 

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