Text : Multi-line data entry widget

t1=tk.Text(parent_window,options)

import tkinter as tk
my_w = tk.Tk() # Parent window 
my_w.geometry("400x180") # Width height of parent window

l1 = tk.Label(my_w,  text='Address')  # added one Label 
l1.grid(row=1,column=1,padx=5,pady=50) # placed on grid 

t1 = tk.Text(my_w, width=40,bg='yellow' , height=4) # Text
t1.grid(row=1,column=2)  # placed on grid 

my_w.mainloop()

Reading data of a Text widget 🔝

t1.get("1.0",END)

t1.get("1.0",'end-1c')

Copy text to a Label 🔝

import tkinter as tk
from tkinter import BOTH, END, LEFT
my_w = tk.Tk()
my_w.geometry("500x300")  
font1=['Arial',22,'normal']
def my_upd():
    #my_str.set(t1.get("1.0",END))  # read the text box data and update the label
    l2.config(text=t1.get("1.0",'end-2c'))

my_str = tk.StringVar() # textvariable of 2nd Label

l1 = tk.Label(my_w,  text='Name', font=font1) # added one Label 
l1.grid(row=1,column=1,padx=2) 

t1 = tk.Text(my_w,  height=2, width=10,bg='yellow',font=font1)# added one text box
t1.grid(row=1,column=2) 

b1 = tk.Button(my_w, text='Update', width=10,bg='red',command=lambda: my_upd()) # button added
b1.grid(row=1,column=3) 

l2 = tk.Label(my_w,  text='I will update', width=20,bg='lightgreen' ,font=font1) # added one Label 
l2.grid(row=2,column=1,columnspan=3,padx=10,pady=20) 
#my_str.set(" I will update") # default text for Lable l2 
t1.focus()
my_w.mainloop() # to keep the window open 

Total number of chars inside the Text widget 🔝

my_str=t1.get("1.0",'end-1c') # excluding the last line break char.
breaks=my_str.count('\n')  # Number of line breaks ( except last one ) 
char_numbers=len(my_str)-breaks # total chars excluding line breaks

Deleting last char inside Text widget 🔝

t1.delete('end-2c')

insert() : Adding string to text widget 🔝

t2.insert(tk.END, my_str1) # adding at the end

t2.insert('1.0','Welcome ')# first line first position

t2.insert('1.5','Welcome ')# first line 5th  position

import tkinter as tk
from tkinter import BOTH, END, LEFT
my_w = tk.Tk()
my_w.geometry("500x300")  

def my_upd():
    my_str.set(t1.get("1.0",END))  # read the text box data and update the label

my_str = tk.StringVar()

l1 = tk.Label(my_w,  text='Your Name', width=10 ) # added one Label 
l1.grid(row=1,column=1) 

t1 = tk.Text(my_w,  height=1, width=20,bg='yellow')# added one text box
#t1=Entry(my_w, width=10)
t1.grid(row=1,column=2) 

b1 = tk.Button(my_w, text='Update', width=10,bg='red',command=lambda: my_upd()) # button added
b1.grid(row=1,column=3) 

l2 = tk.Label(my_w,  textvariable=my_str, width=20 ) # added one Label 
l2.grid(row=1,column=4) 
my_str.set(" I will update")

my_w.mainloop()

import tkinter as tk
from tkinter import BOTH, END, LEFT
my_w = tk.Tk()
my_w.geometry("500x400")  

def my_upd():
    my_str1=t1.get("1.0",END)  # read from one text box t1
    t2.insert(tk.END, my_str1) # Add to another text box t2
    
my_str = tk.StringVar()

l1 = tk.Label(my_w,  text='Your Name', width=10 ) # added one Label 
l1.grid(row=1,column=1) 

t1 = tk.Text(my_w,  height=1, width=20,bg='yellow')# added one text box
#t1=Entry(my_w, width=10)
t1.grid(row=1,column=2) 

b1 = tk.Button(my_w, text='Update', width=10,bg='red',command=lambda: my_upd()) # button added
b1.grid(row=1,column=3) 

t2 = tk.Text(my_w, height=1, width=15, bg='#00f000' ) # added one textbox to read 
t2.grid(row=1,column=4) 

my_w.mainloop()

Delete ( or empty ) text box 🔝

def my_upd():
    my_str1=t1.get("1.0",END)  # read from one text box t1
    t2.insert(tk.END, my_str1) # Add to another text box t2
    t1.delete('1.0',END)       # Delete from position 0 till end 
    t1.update()                # update the delete

Remove all inputs from all text widgets 🔝

for widget in my_w.winfo_children():
        if isinstance(widget, tk.Text):  # If this is an Entry widget 
            widget.delete(0,'end') # Delete all entries 

Focus text box 🔝

t1.focus() 

Methods 🔝

l2.delete(1.4,1.7) # from 4th till 7th position of line one

l2.delete(1.0,END) # from starting till end

get()

print(l2.get(1.4,1.7)) # print from 4th till 7th position of line one
print(l2.get(1.0,END))  # Print from starting till end 

tag_add(), tag_config() & tag_remove() 🔝

import tkinter as tk
from tkinter import BOTH, END, LEFT
my_w = tk.Tk()
my_w.geometry("400x300")  
l1 = tk.Label(my_w,text='Your Name', width=10) #added one Label 
l1.grid(row=1,column=1) 

t1 = tk.Text(my_w,width=35,height=4) #text box
t1.grid(row=1,column=2,columnspan=2,pady=30) 

font1=('Times',16,'underline')
t1.insert(tk.END, "Welcome to plus2net")

t1.tag_add("my_hg", "1.2", "1.13") # tag name my_hg is created 
t1.tag_config("my_hg",background="yellow",foreground="red",font=font1)
t1.tag_remove('my_hg','1.5','1.10') # tag is removed from part 

my_w.mainloop()

Using buttons to trigger events using tags 🔝

#t1.tag_delete('my_hg')
b1=tk.Button(my_w,text='Remove tag',command=lambda:t1.tag_remove('my_hg','1.0','1.7'))
b1.grid(row=2,column=2,pady=10)

b2=tk.Button(my_w,text='Green tag',command=lambda:t1.tag_config('my_hg',background="green",foreground="red",font=font1))
b2.grid(row=2,column=3,pady=10)

Adding hyperlink inside text widget 🔝

import tkinter as tk
import webbrowser

def open_link(url):
    webbrowser.open(url)

my_w = tk.Tk()
my_w.geometry("400x200") 
text = tk.Text(my_w, height=5, width=30, cursor="hand2")
text.grid(row=1,column=1,padx=20,pady=20)
text.insert(tk.INSERT, "Visit ")
text.insert(tk.INSERT, "Google", 'link')
text.tag_configure('link', foreground='blue', underline=True)
text.tag_bind('link', '<Button-1>', lambda e: open_link("https://www.plus2net.com"))

my_w.mainloop()

Selecting all data from Text box : Cut Copy Paste 🔝

def select_all(): # to select all text inside Text box 
    e1.tag_add("sel", "1.0","end") # all text selected
    e1.tag_config("sel",background="green",foreground="red")

Undo and redo 🔝

t1=tk.Text(my_w,height=4,bg='yellow',undo=True)

Listing all attributes 🔝

for option in t1.config():
    print(option + ' :' ,str(t1[option]))

Details on Attributes of a textbox 🔝

bg

Background colour of the text box t1 = tk.Text(my_w, width=8, height=1, bg='yellow') We can update the background colour by using configure() We have two radio buttons , on select of radio buttons we can change the background colour of the text box. t1.configure(bg=r1_v.get()) Read more on Radio buttons Full code is here import tkinter as tk my_w = tk.Tk() my_w.geometry("200x200") l1 = tk.Label(my_w, text='Your Name' ) # added one Label l1.grid(row=1,column=1) t1 = tk.Text(my_w, width=8, height=1) t1.grid(row=1,column=2) ###### Radio buttons ####### def my_upd(): t1.configure(bg=r1_v.get()) # update the colour r1_v = tk.StringVar() # We used string variable here r1_v.set('Yellow') # Can assign value Appear or Failed r1 = tk.Radiobutton(my_w, text='Yellow', variable=r1_v, value='Yellow',command=my_upd) r1.grid(row=2,column=1) r2 = tk.Radiobutton(my_w, text='Red', variable=r1_v, value='Red',command=my_upd) r2.grid(row=2,column=2) my_w.mainloop()

t1 = tk.Text(my_w,  width=8, height=1, bd=6)

t1 = tk.Text(my_w,  width=8, height=1,cursor='circle')

t1 = tk.Text(my_w,  width=20, height=1,
	exportselection=1)

font	Managing font size, family, type etc t1 = tk.Text(my_w, width=20, height=1,font=18) font size with family my_font=('times', 8, 'bold') t1 = tk.Text(my_w, width=20, height=1,font=my_font) Zoom in & Zoom out of Text by using font size Managing font using Menu bar

l1 = tk.Label(my_w,  text='Your Name' ) # added one Label 
l1.grid(row=1,column=1) 

t1 = tk.Text(my_w,  width=10, height=1,fg='red')
t1.grid(row=1,column=2) 

t2 = tk.Text(my_w,  width=10, height=1,fg='green')
t2.grid(row=1,column=3) 

t1 = tk.Text(my_w,  width=10, height=2)

t1 = tk.Text(my_w,  width=10,height=1,highlightbackground='red')

t1 = tk.Text(my_w,  width=10,height=1,highlightcolor='red')

The width of the focus heighlight. ( the rectangle around the text box ) Default value is 1. t1 = tk.Text(my_w, width=10,height=1,highlightthickness=2)

t1 = tk.Text(my_w,width=10,height=1,
insertbackground='red',insertwidth=15)

t1 = tk.Text(my_w,width=10,height=1,
insertborderwidth=8, insertwidth=18)

t1 = tk.Text(my_w,width=10,height=1,
insertofftime=1000,insertontime=1000)

t1 = tk.Text(my_w,width=10,height=1,
insertofftime=1000,insertontime=1000)

t1 = tk.Text(my_w,  width=10,height=1,insertwidth=15)

justify	Text justification . Values can be LEFT RIGHT or CENTER

import tkinter as tk
my_w = tk.Tk()
my_w.geometry("250x200")  
l1 = tk.Label(my_w,  text='relief' ) # added one Label 
l1.grid(row=1,column=1) 

l1 = tk.Label(my_w,  text='Raised' ) # added one Label 
l1.grid(row=2,column=1) 

t1 = tk.Text(my_w,  width=10,height=1,relief='raised')
t1.grid(row=2,column=2) 

l1 = tk.Label(my_w,  text='sunken' ) # added one Label 
l1.grid(row=3,column=1) 

t1 = tk.Text(my_w,  width=10,height=1,relief='sunken')
t1.grid(row=3,column=2)

l1 = tk.Label(my_w,  text='flat' ) # added one Label 
l1.grid(row=4,column=1) 

t1 = tk.Text(my_w,  width=10,height=1,relief='flat')
t1.grid(row=4,column=2)

l1 = tk.Label(my_w,  text='ridge' ) # added one Label 
l1.grid(row=5,column=1) 
t1 = tk.Text(my_w,  width=10,height=1,relief='ridge')
t1.grid(row=5,column=2)

l1 = tk.Label(my_w,  text='solid' ) # added one Label 
l1.grid(row=6,column=1) 
t1 = tk.Text(my_w,  width=10,height=1,relief='solid')
t1.grid(row=6,column=2)

l1 = tk.Label(my_w,  text='groove' ) # added one Label 
l1.grid(row=7,column=1) 

t1 = tk.Text(my_w,  width=10,height=1,relief='groove')
t1.grid(row=7,column=2)

my_w.mainloop()

t1 = tk.Text(my_w,  width=10,height=1,
selectbackground='red')

t1 = tk.Text(my_w,  width=10,height=1,
selectforeground='yellow')

t1 = tk.Text(my_w,  height=1, width=20)

How to Add Events to Tkinter Text Widget 🔝

Steps to Add Events to a Tkinter Text Widget

1. Create the Text widget.
2. Use the bind() method of the widget to associate an event with a callback function.
3. Define the callback function to handle the event.

Example: Handling Keyboard Events

import tkinter as tk

# Callback function to handle the event
def on_key_press(event):
    print(f"Key pressed: {event.char}")

# Callback for mouse click
def on_mouse_click(event):
    print(f"Mouse clicked at position: {event.x}, {event.y}")

# Create the main application window
root = tk.Tk()
root.title("Text Widget Event Example")

# Create a Text widget
text_widget = tk.Text(root, width=40, height=10)
text_widget.pack(pady=10)

# Bind events to the Text widget
text_widget.bind("<KeyPress>", on_key_press)  # Key press event
text_widget.bind("<Button-1>", on_mouse_click)  # Left mouse click event

# Start the Tkinter main loop
root.mainloop()

Explanation of Code

1. Key Press Event (<KeyPress>): Triggered when a key is pressed. The event.char property holds the character of the key pressed.
2. Mouse Click Event (<Button-1>): Triggered when the left mouse button is clicked within the widget. The event.x and event.y properties provide the click's coordinates.

Common Events for Text Widget

• <KeyPress>: Detect key presses.
• <KeyRelease>: Detect key releases.
• <Button-1>: Detect left mouse button clicks.
• <Button-3>: Detect right mouse button clicks.
• <Motion>: Detect mouse movement.
• <Enter>: Triggered when the mouse enters the widget area.
• <Leave>: Triggered when the mouse leaves the widget area.

Notes

• The bound callback functions receive an event object as an argument, which provides detailed information about the event.
• You can bind multiple events to the same Text widget for richer interactivity.

1. Exercise on Text
2. Ask user to enter Name, marks ( in three subjects Physics, Chemistry, Math ) and attendance of a student. On Update , the data will be stored in a Dictionary and finally in a CSV file. ( Break it in parts, First display the data using print(), then create Dictionary and then save as CSV file. )
3. Create one user data entry box in the window and on click of the Save button the text entered in the entry box will be saved into one text file using the filedialog.
   ( Solution ) Save data entered by user in Tkinter window »
4. Save the above user entered data to one PDF file.
   ( Solution ) Save data entered by user in Tkinter window to PDF file »

Questions 🔝

Subhendu Mohapatra

AUTHOR

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