Build a WhiteBoard Application in Tkinter! (Python GUI)

Are you interested in creating a whiteboard application using Tkinter, a popular Python GUI library? In this article, we’ll walk through the process of building a simple whiteboard application using Tkinter and Python. This application will allow users to draw and erase on a canvas, making it a great starting point for creating more complex whiteboard applications in the future.

Setting up the canvas

To get started, we’ll need to create a new Tkinter window and add a canvas to it. The canvas will be used as the whiteboard where users can draw and erase. Here’s an example of how to create a canvas in Tkinter:

    
import tkinter as tk

# Create the main window
root = tk.Tk()
root.title("Whiteboard Application")

# Create a canvas
canvas = tk.Canvas(root, width=800, height=600, bg="white")
canvas.pack()

root.mainloop()
    
  

Adding drawing and erasing functionality

Now that we have a canvas, we can add functionality to allow users to draw on it. We can use the bind method to bind mouse events to the canvas, allowing users to draw lines as they click and drag the mouse. Additionally, we can add a button to allow users to erase parts of their drawing. Here’s an example of how to add drawing and erasing functionality to our whiteboard application:

    
# Define the drawing function
def start_drawing(event):
    canvas.bind("", draw)
    
def draw(event):
    x, y = event.x, event.y
    canvas.create_oval(x-2, y-2, x+2, y+2, fill="black")

# Add a button to erase the canvas
erase_button = tk.Button(root, text="Erase", command=clear_canvas)
erase_button.pack()

def clear_canvas():
    canvas.delete("all")

canvas.bind("", start_drawing)

root.mainloop()
    
  

Conclusion

With just a few lines of code, we’ve created a simple whiteboard application using Tkinter and Python. This is a great starting point for adding more features, such as saving and loading drawings, adding color options, and more. Tkinter provides a powerful and easy-to-use framework for creating GUI applications, and building a whiteboard application is a great way to practice using it. Happy coding!