tkinter example WidgetsDemo (snippet)

Python tkinter (gui) example 'WidgetsDemo'

WidgetsDemo

Python tkinter example: WidgetsDemo

from tkinter import * # Import tkinter

class WidgetsDemo:
    def __init__(self):
        window = Tk() # Create a window
        window.title("Widgets Demo") # Set a title

        # Add a button, a check button, and a radio button to frame1
        frame1 = Frame(window) # Create and add a frame to window
        frame1.pack()      
        self.v1 = IntVar() #IntVar is a class defined in tkinter module; v1 is the object/instance
        cbtBold = Checkbutton(frame1, text = "Bold", 
            variable = self.v1, command = self.processCheckbutton) 
        self.v2 = IntVar()
        rbRed = Radiobutton(frame1, text = "Red", bg = "red",
                variable = self.v2, value = 1, 
                command = self.processRadiobutton) 
        rbYellow = Radiobutton(frame1, text = "Yellow", 
                bg = "yellow", variable = self.v2, value = 2, 
                command = self.processRadiobutton) 
        cbtBold.grid(row = 1, column = 1)
        rbRed.grid(row = 1, column = 2)
        rbYellow.grid(row = 1, column = 3)

        # Add a button, a check button, and a radio button to frame1
        frame2 = Frame(window) # Create and add a frame to window
        frame2.pack()
        label = Label(frame2, text = "Enter your name: ")
        self.name = StringVar()
        entryName = Entry(frame2, textvariable = self.name) 
        btGetName = Button(frame2, text = "Get Name", 
            command = self.processButton)
        message = Message(frame2, text = "It is a widgets demo")
        label.grid(row = 1, column = 1)
        entryName.grid(row = 1, column = 2)
        btGetName.grid(row = 1, column = 3)
        message.grid(row = 1, column = 4)

        # Add a text
        text = Text(window) # Create a text add to the window
        text.pack()
        text.insert(END, 
            "Tip\nThe best way to learn Tkinter is to read ")
        text.insert(END, 
            "these carefully designed examples and use them ")
        text.insert(END, "to create your applications.")

        window.mainloop() # Create an event loop

    def processCheckbutton(self):
        print("check button is " 
            + ("checked " if self.v1.get() == 1 else "unchecked"))

    def processRadiobutton(self):
        print(("Red" if self.v2.get() == 1 else "Yellow") 
            + " is selected " )

    def processButton(self):
        print("Your name is " + self.name.get())

WidgetsDemo() # Create GUI

Useful links

• Learn Tkinter: https://pythonbasics.org/tkinter/
• Wikipedia tkinter: https://en.wikipedia.org/wiki/Tkinter