Python-Tkinter Scrollbar

26 Mar, 2020
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. Creating a GUI using Tkinter is an easy task.
Note: For more information, refer to Python GUI – tkinter
The scrollbar widget is used to scroll down the content. We can also create the horizontal scrollbars to the Entry widget.
Syntax:The syntax to use the Scrollbar widget is given below.
w = Scrollbar(master, options) 
Parameters:
master: This parameter is used to represents the parent window.
options: There are many options which are available and they can be used as key-value pairs separated by commas.
Options:Following are commonly used Option can be used with this widget :-
activebackground: This option is used to represent the background color of the widget when it has the focus.
bg: This option is used to represent the background color of the widget.
bd: This option is used to represent the border width of the widget.
command: This option can be set to the procedure associated with the list which can be called each time when the scrollbar is moved.
cursor: In this option, the mouse pointer is changed to the cursor type set to this option which can be an arrow, dot, etc.
elementborderwidth: This option is used to represent the border width around the arrow heads and slider. The default value is -1.
Highlightbackground: This option is used to focus highlighcolor when the widget doesn’t have the focus.
highlighcolor: This option is used to focus highlighcolor when the widget has the focus.
highlightthickness: This option is used to represent the thickness of the focus highlight.
jump: This option is used to control the behavior of the scroll jump. If it set to 1, then the callback is called when the user releases the mouse button.
orient: This option can be set to HORIZONTAL or VERTICAL depending upon the orientation of the scrollbar.
repeatdelay: This option tells the duration up to which the button is to be pressed before the slider starts moving in that direction repeatedly. The default is 300 ms.
repeatinterval: The default value of the repeat interval is 100.
takefocus: You can tab the focus through a scrollbar widget
troughcolor: This option is used to represent the color of the trough.
width: This option is used to represent the width of the scrollbar.
Methods:Methods used in this widgets are as follows:
get(): This method is used to returns the two numbers a and b which represents the current position of the scrollbar.
set(first, last): This method is used to connect the scrollbar to the other widget w. The yscrollcommand or xscrollcommand of the other widget to this method.
Example:
from tkinter import *  root = Tk()root.geometry("150x200")   w = Label(root, text ='GeeksForGeeks',          font = "50")   w.pack()   scroll_bar = Scrollbar(root)  scroll_bar.pack( side = RIGHT,                fill = Y )   mylist = Listbox(root,                  yscrollcommand = scroll_bar.set )   for line in range(1, 26):    mylist.insert(END, "Geeks " + str(line))  mylist.pack( side = LEFT, fill = BOTH )  scroll_bar.config( command = mylist.yview )   root.mainloop()
Output:
Python-tkinter
Python
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