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Tkinter Articles
Page 45 of 46
How 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 ...
Read MoreHow to change the font and size of buttons and frame in tkinter?
Tkinter Button Widgets are a general way to provide Event Handling in a variety of applications. Sometimes, we may need to style the buttons which are defined in an application. In order to add styling in the button widgets, first create an instance of Button widget using a variable. Then, add some property like fontfamily, font-size, padding, etc. into it. The most general way to resize the button is by resizing the text in it.ExampleIn this example, we have created a button that can be resized by changing the value in the 'font' property.#Import tkinter library from tkinter import * ...
Read MoreHow to change the color of ttk button in Tkinter?
Tkinter widgets have a consistent look and style across all the platforms and operating systems. Ttk works like CSS in an HTML script. It has many inbuilt functions, modules and methods that add style to a regular tkinter widget. Tkinter ttk buttons generally have a default color scheme, thus we can change the background color of these buttons by configuration method.ExampleIn this example, we will create a button which when pressed will change its style.#Import the necessary library import itertools from tkinter import * from tkinter import ttk #Create an instance of tkinter window win = Tk() #Set the geometry ...
Read MoreHow to change text cursor color in Tkinter?
Tkinter Entry and text widgets are used to create single and multiline text input fields. In order to change the color of the cursor, we can specify the insertbackground property by assigning the color of the cursor.ExampleIn this example, we have created the text field and we have changed the color of the cursor by defining the insertbackground property.#Import the tkinter library from tkinter import * #Create an instance of tkinter frame win= Tk() win.geometry("750x250") #Create a text field text= Text(win) text.configure(bg= 'SteelBlue3', insertbackground='red') text.pack() win.mainloop()OutputNow, write something in the text field to see the reflected color of the cursor.
Read MoreHow to add space between two widgets placed in a grid in tkinter?
Let us assume that we are creating a tkinter application where two or more widgets are placed using a grid property. We have to add some space between the widgets in order to style their appearance. To provide space in the widgets, we can use padding property, as padding adds space to the outermost part of the widget. In order to add padding, assign the values to padx and pady.Example#Import the required library from tkinter import * #create an instance of tkinter frame win= Tk() win.geometry("750x250") #Create some Button widgets Label(win, text= "New Line Text", font= ('Helvetica 20 bold')).grid(row=0, column=5, ...
Read MoreHow do I give focus to a python Tkinter text widget?
In various applications, tkinter widgets are required to be focused to make them active. Widgets can also grab focus and prevent the other events outside the bounds. To manage and give focus to a particular widget, we generally use the focus_set() method. It focuses the widget and makes them active until the termination of the program.ExampleIn the following example, we have created two widgets: an Entry widget and a text widget in the same window. By using the focus_set() method, we will activate the focus on the text widget.#Import tkinter library from tkinter import * from PIL import Image, ImageTk ...
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