Nov-24-2019, 02:28 AM
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
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()