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Tkinter Class
#1
Hi,

I need some help understanding the class in the code below. I am using the code to learn from and have searched the internet and have not found any information that I understand.

Why is a class necessary and is this a standard class for Tkinter. What do the contents of the class actually mean? Any help would be appreciated.

Thanks
PE









try:
    import Tkinter
    import ttk
except ImportError:  # Python 3
    import tkinter as Tkinter
    import tkinter.ttk as ttk


class Window(Tkinter.Frame):
    '''
    classdocs
    '''
    def __init__(self, master):
        '''
        Constructor
        '''
        Tkinter.Frame.__init__(self, )
        self.master=master
        self.initialize_user_interface()

    def initialize_user_interface(self):
        """Draw a user interface allowing the user to type
        items and insert them into the treeview
        """
        self.master.title("Canvas Test")
        self.master.grid_rowconfigure(0, weight=1)
        self.master.grid_columnconfigure(0, weight=1)
        self.master.config(background="lavender")

        # Define the different GUI widgets
        self.dose_label = Tkinter.Label(self.master, text="Doserr:")
        self.dose_entry = Tkinter.Entry(self.master)
        self.dose_label.grid(row=0, column=0, sticky=Tkinter.W)
        self.dose_entry.grid(row=0, column=1)

        self.modified_label = Tkinter.Label(self.master,
                                            text="Date Modified:")
        self.modified_entry = Tkinter.Entry(self.master)
        self.modified_label.grid(row=1, column=0, sticky=Tkinter.W)
        self.modified_entry.grid(row=1, column=1)

        self.submit_button = Tkinter.Button(self.master, text="Insert",
                                            command=self.insert_data)
        self.submit_button.grid(row=2, column=1, sticky=Tkinter.W)
        self.exit_button = Tkinter.Button(self.master, text="Exit",
                                          command=self.master.quit)
        self.exit_button.grid(row=0, column=3)

        # Set the treeview
        self.tree = ttk.Treeview(self.master,
                                 columns=('Title', 'Author','Year','ISBN'))
        self.tree.heading('#0', text='Title')
        self.tree.heading('#1', text='Author')
        self.tree.heading('#2', text='Year')
        self.tree.heading('#3', text='ISBN')
        self.tree.column('#1', stretch=Tkinter.YES)
        self.tree.column('#2', stretch=Tkinter.YES)
        self.tree.column('#0', stretch=Tkinter.YES)
        self.tree.column('#3', stretch=Tkinter.YES)
        self.tree.grid(row=4, columnspan=4, sticky='nsew')
        self.treeview = self.tree
        # Initialize the counter
        self.i = 0

    def insert_data(self):
        """
        Insertion method.
        """
        self.treeview.insert('', 'end', text="Item_"+str(self.i),
                             values=(self.dose_entry.get() + " mg",
                                     self.modified_entry.get()))
        # Increment counter
        self.i = self.i + 1


def main():
    root=Tkinter.Tk()
    d=Window(root)
    root.mainloop()

if __name__=="__main__":
    main()
Reply


Messages In This Thread
Tkinter Class - by pythonenthusiast2 - Nov-24-2019, 02:28 AM
RE: Tkinter Class - by Larz60+ - Nov-24-2019, 03:51 AM

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