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
Scrollbar Widget
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:
