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Articles on Trending Technologies
Technical articles with clear explanations and examples
Resizing pictures in PIL in Tkinter
Python provides Pillow or PIL package for image processing which is used to load, process, and customize the images in an application. It has many properties like Color of the image, Image Font, resizing the images, loading the image, etc.In order to resize the Images in an application, we can use the resize(width, height) method. The method can be invoked after loading the image in the application. In order to open the image in the application, we have to import the package in the notebook as, from PIL import Image, ImageTkExampleIn the following example, we have resized an image to ...
Read MoreRemoving minimize/maximize buttons in Tkinter
When we run our tkinter application, it initially displays a window that has an interface to display all the widgets. Eventually, we can remove the maximizing and minimizing property of the displayed window by using the resizable(boolean) method. It takes two Boolean values that refer to the status of width and height of the window. We generally disable the max and min resizing property by assigning zero to both values of width and height.Example#Import the required library from tkinter import* #Create an instance of tkinter frame win= Tk() #Set the geometry win.geometry("750x250") #Disable the resizable Property win.resizable(False, False) #Create an ...
Read MoreNotebook widget in Tkinter
Notebook widget is an inbuilt widget of ttk library in tkinter. It enables the user to create Tabs in the window application. Tabs are generally used to separate the workspace and specialize the group of operations in applications at the same time.ExampleIn this example, we will create two tabs using Notebook widget and then will add some context to it.#Import the required library from tkinter import * from tkinter import ttk #Create an instance of tkinter frame win = Tk() win.geometry("750x250") #Create a Notebook widget my_notebook= ttk.Notebook(win) my_notebook.pack(expand=1, fill=BOTH) #Create Tabs tab1= ttk.Frame(my_notebook) my_notebook.add(tab1, text= "Tab 1") tab2= ttk.Frame(my_notebook) my_notebook.add(tab2, ...
Read MoreHow to use an image for the background in tkinter?
Background images in tkinter are versatile as the functionality can be used in making 3D, 2D games, screensaver, desktop visualizations software, etc. Tkinter canvas is used to work with all these functionalities in an application.ExampleIn this example, we will add a background image using the create_image() method in the canvas widget.#Import the required library from tkinter import * from PIL import Image, ImageTk from tkinter import ttk #Create an instance of tkinter window win= Tk() #Define the geometry of the window win.geometry("750x650") #Load the image bg= ImageTk.PhotoImage(file="./tutorialspoint.png") #Create a canvas canvas= Canvas(win, width= 400, height= 200) canvas.pack(expand=True, fill= BOTH) #Add the ...
Read MoreHow to update an image in a Tkinter Canvas?
Canvas can be used to play with images, animating objects, 3D modeling, displaying text, and many more. Moreover, we can display an image file using the create_image() constructor.Following this, let us build an application that can update the canvas images locally. We can add a button to trigger the event which when pressed will change the canvas image.To change a particular image, we can configure the canvas by using the itemconfig() constructor. It takes image files which need to be updated and displayed them on the window.Use three images of your choice and save them in the same project directory.Example#Import ...
Read MoreHow to set focus on Entry widget in Tkinter?
Let us suppose that there are some widgets present in an application such that we have to focus on a particular widget. By using the focus_set() method, we can activate the focus on any widget and give them priority while executing the application.Example#Import tkinter library from tkinter import * #Create an instance of tkinter frame win = Tk() #Set the geometry of tkinter window win.geometry("750x250") #Create an Entry Widget entry= Entry(win, width= 25) entry.insert(0, "ttk Entry widget") entry.pack() #Set the focus to Entry widget entry.focus_set() win.mainloop()OutputWhen we run our program, it will display a window with ...
Read MoreHow to interactively validate an Entry widget content in tkinter?
Validating the content is a necessary part of any featured application where we allow only the required data to be processed. An Entry Widget in tkinter is used to display single line text Input. However, we can validate the Entry widget to accept only digits or alphabets.Let us first create an Entry widget that accepts only digits input. So initially, we will create an Entry widget and using register(callback) function, we will call to validate the Entry widget which validates whenever a key is stroked. It returns a string that can be used to call a function. Then, calling the ...
Read MoreHow to disable (grey out) a checkbutton in Tkinter?
Tkinter provides a variety of input widgets such as entry widget, text widget, listbox, combobox, spinbox, checkbox, etc. Checkboxes are used for taking validity input and the state gets active whenever the user clicks on the checkbutton. In terms of a particular application, we can enable and disable the state of CheckButtons by using the state property.Example#Import the required library from tkinter import* from tkinter import ttk #Create an instance of tkinter frame win= Tk() #Set the geometry win.geometry("750x250") #Create CheckButtons chk= ttk.Checkbutton(win, text="Python") chk.pack() chk.config(state=DISABLED) win.mainloop()OutputRunning the example code will display a window with a check button that is ...
Read MoreHow to Disable / Enable a Button in TKinter?
There are various attributes and properties in each tkinter widget to help us extend the functionality of the application. Tkinter Button widgets can be enabled and disabled by defining its state in the Button Object. The state attribute generally accepts two values Normal and Disabled which are used for enabling and disabling the button, respectively.Example#Import necessary Library from tkinter import * from tkinter import ttk from tkinter.filedialog import asksaveasfile #Create an instance of tkinter window win= Tk() #Set the geometry of tkinter window win.geometry("750x250") #Define the function to change the value in label widget def change_text(label): label.configure(text= "Hey, I ...
Read MoreHow to create a timer using tkinter?
In this example, we will create a timer using Python Tkinter. For displaying time, we will use the Time Module in Python.Initially, we will follow these steps to create the timer, Create three entry widget each for Hours, Minute and Seconds and set the value ‘00’ by default.Create a Button for setting the timer. It will call the function countdowntimer().Define a function countdowntimer() which does update once we click on the button to propagate the time.Example#Import the required library from tkinter import * import time #Create an instance of tkinter frame win = Tk() win.geometry('750x300') win.resizable(False, False) #Configure the background ...
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