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Window Resizer Control Panel – Tkinter

  • Last Updated : 31 May, 2021

Prerequisite: Tkinter

Python offers multiple options for developing a GUI (Graphical User Interface). Out of all the GUI methods, Tkinter is the most commonly used method. It is a standard Python interface to the Tk GUI toolkit shipped with Python. Python with Tkinter is the fastest and easiest way to create GUI applications.

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In this article, we will learn how to make a window resizer control panel that is used to resize the window size once it is initialized.



Approach:

  • We will create two windows; one window is a parent and another one is a child.
  • Add one button; when we click on a button it will open the child window.
  • The parent window contains three sliders; width, height, and both sliders.
  • As the slide value change, child geometry will change.

Let’s understand step by step implementation:-

Step 1: Create a Normal Tkinter window

Python3




# Import Library
from tkinter import *
 
# Create Object
root = Tk()
 
# Set title
root.title("Controls")
 
# Set Geometry
root.geometry("400x500")
 
# Execute Tkinter
root.mainloop()

 

 

Output:

 



 

Step 2: Add Button, Sliders & LabelFrame

 

Python3




# Import Library
from tkinter import *
from tkinter import ttk
 
# Create Object
root = Tk()
 
# Set title
root.title("Controls")
 
# Set Geometry
root.geometry("400x500")
 
# Make Button
launch_button = Button(root,
                       text = "launch Window")
launch_button.pack(pady = 10)
 
# Add Label Frames
width_frame = LabelFrame(root,
                         text = "Change width")
 
width_frame.pack(pady = 10)
 
height_frame = LabelFrame(root,
                          text = "change height")
height_frame.pack(pady = 10)
 
both_frame = LabelFrame(root,
                        text = "change both")
 
both_frame.pack(pady = 10)
 
# Add Scale bar
width_slider = ttk.Scale(width_frame,
                         from_ = 100,
                         to = 500,
                         orient = HORIZONTAL,
                         length = 200, value = 100)
 
width_slider.pack(pady = 10, padx = 20)
 
height_slider = ttk.Scale(height_frame,
                          from_ = 100, to = 500,
                          orient = VERTICAL,
                          length = 200, value = 100)
height_slider.pack(pady = 10, padx = 20)
 
both_slider = ttk.Scale(both_frame, from_ = 100,
                        to = 500, orient = HORIZONTAL,
                        length = 200, value = 100)
 
both_slider.pack(pady = 10,padx = 20)
 
# Execute Tkinter
root.mainloop()

 

 

Output:-

 



 

Step 3: Now we will create four functions; one function is for a button that will open the child window, and the other three for changing the geometry.

 

Use the Toplevel() method to create a child window.

 

Python3




# Open New Window
def launch():
    global second
    second = Toplevel()
    second.geometry("100x100")
 
# Change width
def width_slide(x):
    second.geometry(f"{int(width_slider.get())}x{int(height_slider.get())}")
 
# Change height
def height_slide(x):
    second.geometry(f"{int(width_slider.get())}x{int(height_slider.get())}")
 
# Change both width and height
def both_slide(x):
    second.geometry(f"{int(both_slider.get())}x{int(both_slider.get())}")

 

 

Below is the full implementation:

 

Python3




# Import Library
from tkinter import *
from tkinter import ttk
 
# Create Object
root = Tk()
# Set title
root.title("Controls")
# Set Geometry
root.geometry("400x500")
 
# Open New Window
def launch():
    global second
    second = Toplevel()
    second.geometry("100x100")
 
# Change width
def width_slide(x):
    second.geometry(f"{int(width_slider.get())}x{int(height_slider.get())}")
 
# Change height
def height_slide(x):
    second.geometry(f"{int(width_slider.get())}x{int(height_slider.get())}")
 
# Change both width and height
def both_slide(x):
    second.geometry(f"{int(both_slider.get())}x{int(both_slider.get())}")
 
# Make Button
launch_button = Button(root,
                       text = "launch Window",
                       command = launch)
 
launch_button.pack(pady = 10)
 
# Add Label Frames
width_frame = LabelFrame(root,
                         text = "Change width")
width_frame.pack(pady = 10)
 
height_frame = LabelFrame(root,
                          text = "change height")
height_frame.pack(pady = 10)
 
both_frame = LabelFrame(root,
                        text = "change both")
both_frame.pack(pady = 10)
 
# Add Scale bar
width_slider = ttk.Scale(width_frame,from_ = 100, to = 500,
                         orient = HORIZONTAL, length = 200,
                         command = width_slide,
                         value = 100)
 
width_slider.pack(pady = 10, padx = 20)
 
height_slider = ttk.Scale(height_frame, from_ = 100, to = 500,
                          orient = VERTICAL, length = 200,
                          command = height_slide,
                          value = 100)
height_slider.pack(pady = 10, padx = 20)
 
both_slider = ttk.Scale(both_frame, from_ = 100,to = 500,
                        orient = HORIZONTAL, length = 200,
                        command = both_slide, value = 100)
both_slider.pack(pady = 10, padx = 20)
 
# Execute Tkinter
root.mainloop()

 

 

Output:

 

 




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