Python Tkinter Entry

Introduction to Python Tkinter Entry

Python Tkinter entry is among the most generally used graphical user interface in python to design textboxes in GUIs. Here the entry widget in tkinter is a user for building customizable textboxes in the GUI interfaces which are being developed.

Syntax:

Entry(master,option=value,)

Attributes

Following are commonly used attributes:

Methods

Following are commonly used methods:

Examples of Python Tkinter Entry

The examples are given below:

Example #1

Code:

import tkinter as tk
from tkinter import messagebox
obj1 = tk.Tk()
def obj1_clear():
textbox.delete(0,10)
def message_box():
messagebox.showinfo("Yes",textbox.get())
textbox = tk.Entry(obj1,
bg = "yellow",
cursor ="arrow",
exportselection=0,
fg="blue",
highlightcolor="black",
justify="right",
textvariable="StringVar",
width=10,
xscrollcommand="scrollbar"
)
textbox.pack()
clear_button = tk.Button(obj1,
text = "clear",
command = obj1_clear
)
redisplay_button = tk.Button(obj1,
text = "Redisplay",
command = message_box
)
clear_button.pack()
redisplay_button.pack()
obj1.mainloop()

Output:

Explanation:

As the entry widget in Tkinter is used for designing a textbox, here in this example, we have used this option to design a textbox with two action buttons associated with it. One is the clear button used for erasing the textbox’s content, and the other one is the redisplay button, which generates a message prompt holding the value entered in the textbox.

The textbox is created with the below-mentioned attributes,

• background: yellow
• cursor: arrow
• export selection: 0
• foreground: blue
• highlight color: black
• justify: right
• text variable: StringVar
• width: 10
• scroll command: scrollbar

The Tkinter button function is used for creating the necessary buttons. Here, the first button’s variable name is placed as clear_button, and the second button is placed as redisplay_button. Both the buttons are generated using object1 as the control object. The generated text boxes and the buttons are packed using the pack() method. packing these entities make them be a part of the frame or the panel to which it is associated. the command line of the redisplay button is associated with a method called message box. The intention of the message box method is to prompt a Tkinter message box when triggered by the redisplay_button. the message box is built in such a manner that

it will retrieve content from the textbox which was created before. Setting this particular method with the textbox variable in terms like “textbox.get()” will help to retrieve the contents of the textbox and post it as a part of the message box prompt. Another notable point is for generating the message box the “from Tkinter import message box” the quoted import is applied.

On execution of the given program, we can notice that the output was text value typed in the text box and is pulled and populated as a standard content of the message box prompt.

Example #2

Code:

import tkinter as tk
obj1 = tk.Tk()
obj2 = tk.Tk()
def obj1_clear():
textbox1.delete(0,10)
def fill_textbox2():
textbox2.insert(1,textbox1.get())
textbox1 = tk.Entry(obj1,
bg = "yellow",
cursor ="arrow",
fg="blue",
highlightcolor="black",
justify="right",
textvariable="StringVar",
width=100,
xscrollcommand="scrollbar"
)
textbox1.pack()
clear_button = tk.Button(obj1,
text = "clear",
command = obj1_clear
)
clear_button.pack()
textbox2 = tk.Entry(obj2,
bg = "yellow",
cursor ="arrow",
fg="blue",
highlightcolor="black",
justify="right",
textvariable="StringVar",
width=50,
xscrollcommand="scrollbar"
)
textbox2.pack()
redisplay_button = tk.Button(obj1,
text = "Redisplay",
command = fill_textbox2
)
redisplay_button.pack()
obj1.mainloop()
obj2.mainloop()

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Output:

Explanation:

This is another example that embraces the application of tkinter entry method for creating and using a customizable textbox setup. Again in this example, the primary panel is associated with two buttons; one is the clear button, and the other one is the redisplay button. In this example, instead of pulling the value from a textbox and posting it in a message prompt, here we have pulled the value from the message box and posted it into another customizable textbox widget.

Here both the textboxes are created with the below-mentioned attributes,

• background: yellow
• cursor: arrow
• foreground: blue
• highlight color: black
• justify: right
• text variable: StringVar
• width: 50
• scroll command: scrollbar

Here, the Tkinter button function is used for creating the needed button widgets on discussing the coding terms. Also, the names or variable names of the button used here are very much similar to the above example, it is as clear_button and redisplay_button. Also, here both the buttons are again generated using object1 as the control object. The generated text boxes and the buttons are packed using the pack() method. packing these entities make them be a part of the frame or the panel to which it is associated.

Here the additional text box was the content of the first textbox will be redisplayed is declared as a separate widget in terms of the control object to which it is associated. here a separate object2 is declared and placed as the control for the second textbox. Again, the retrieval of the content from the first textbox is achieved through the command argument in the button widget. More specifically to mention the “textbox1.get()” is used for pulling the value from the primary textbox(textbox1), and textbox2.insert() is used for inserting the retrieved value in the second text.

Again here on the execution of the program, we can notice the output was text value which has been typed in the primary text box is pulled and populated in the other textbox(textbox2).

Conclusion

The above programs help us to achieve deep insight into Tkinter entry widgets and the sophisticated manner of using them.

Recommended Articles

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