Tkinter OOP More than one Entry

Question

So, I decided to revamp my coursework app to use OOP for Tkinter and a problem arose.

I use 4 entries for the login screen, 2 for login and 2 for register - each being username and password per side.

Problem I have arose here:

This is my OOP class:

class windowGen:
    def __init__(self, master, title, geometry, background):
        self.master = master
        self.title = title
        self.geometry = geometry
        self.background = background
        master.title(title)
        master.geometry(geometry)
        master.configure(bg=background)
    def createLabel(self, master, contents, fgcolor, bgcolor, horizontal, vertical):
        self.label = Label(master, text=contents, justify=LEFT, fg=fgcolor, bg=bgcolor, font="TkFixedFont")
        self.label.place(x=horizontal, y=vertical)
    def getEntry(self):
        return self.entry.get()
    def exitWindow(self):
        self.master.destroy()
    def createEntry(self, master, horizontal, vertical):
        self.entry = Entry(master)
        self.entry.place(x=horizontal,y=vertical)

Now, the problems are createEntry and getEntry. These work perfect when there is only 1 entry per window, but now I have 4. How do I manage 4 entries when I only use self.entry?

TL;DR: How does one manage entries using OOP Tkinter when you have more than 1 entry box on a window?

Written in Python 3.9.0, latest version of TK and Tcl.

Answer 1

You can use a dictionary to store the created entries using an unique name as the key:

class windowGen:
    def __init__(self, master, title, geometry, background):
        self.master = master
        self.title = title
        self.geometry = geometry
        self.background = background
        master.title(title)
        master.geometry(geometry)
        master.configure(bg=background)
        self.entries = {}  # dictionary to store the entries
    def createLabel(self, master, contents, fgcolor, bgcolor, horizontal, vertical):
        self.label = Label(master, text=contents, justify=LEFT, fg=fgcolor, bg=bgcolor, font="TkFixedFont")
        self.label.place(x=horizontal, y=vertical)
    def getEntry(self, name): # get value of entry specified by name
        return self.entries[name].get()
    def exitWindow(self):
        self.master.destroy()
    def createEntry(self, master, horizontal, vertical, name=None):
        entry = Entry(master)
        entry.place(x=horizontal,y=vertical)
        name = name or str(entry)  # use passed name or tkinter internal name
        self.entries[name] = entry
        return name  # return the name as the entry ID

Then you can use the name to access the entry like below:

root = Tk()
gen = windowGen(root, "title", "400x200", "gold")
e1 = gen.createEntry(root, 10, 10)
...
gen.getEntry(e1)