Before moving on to the topic lets see what is Python Tkinter. So, we all know that Python has different options for creating GUI(s) and tkinter is one of them. It is the standard GUI library for Python. And it makes the creation of GUI applications very quick still simple when python is merged with it. It also gives a very effective object-oriented interface to the Tk GUI toolkit.
Note: For more information, refer to Python GUI – tkinter
Widgets in tkinter
Moreover, Tkinter enables number of controls like labels, text boxes, list boxes, buttons, scrollbars etc, which are used in a GUI applications. These controls are known as widgets.
Geometry management methods of tkinter
These methods are used to organize widgets across parents widget area. Moreover, these methods can be accessed by all the tkinter widgets. There are three geometry management methods namely pack(), grid(), and place(). All these methods have different roles.
Now, lets discuss about the topic Autohiding Scrollbars using Python-tkinter.
In this topic, we will see how auto-hiding scrollbars are created using tkinter in Python. So, firstly lets see the meaning of auto hiding scrollbars below:
Auto-hiding Scrollbars
When a scrollbar hides itself if its not required i.e, it is not visible when its not needed then that type of scrollbar is known as Auto-hiding Scrollbar. In Python Autohiding scrollbars can be used with Listbox and Text widgets. It can be implemented using python tkinter with the help of some geometry management methods.
Below examples illustrate the use of Autohiding Scrollbars using Python-tkinter:
Example 1:
# Python program to illustrate the usage of # autohiding scrollbars using tkinter # Importing tkinter from tkinter import * # Creating class AutoScrollbar class AutoScrollbar(Scrollbar): # Defining set method with all # its parameter def set(self, low, high): if float(low) <= 0.0 and float(high) >= 1.0: # Using grid_remove self.tk.call("grid", "remove", self) else: self.grid() Scrollbar.set(self, low, high) # Defining pack method def pack(self, **kw): # If pack is used it throws an error raise (TclError,"pack cannot be used with \ this widget") # Defining place method def place(self, **kw): # If place is used it throws an error raise (TclError, "place cannot be used with \ this widget") # creating tkinter window root = Tk() # Defining vertical scrollbar verscrollbar = AutoScrollbar(root) # Calling grid method with all its # parameter w.r.t vertical scrollbar verscrollbar.grid(row=0, column=1, sticky=N+S) # Defining horizontal scrollbar horiscrollbar = AutoScrollbar(root, orient=HORIZONTAL) # Calling grid method with all its # parameter w.r.t horizontal scrollbar horiscrollbar.grid(row=1, column=0, sticky=E+W) # Creating scrolled canvas canvas = Canvas(root, yscrollcommand=verscrollbar.set, xscrollcommand=horiscrollbar.set) canvas.grid(row=0, column=0, sticky=N+S+E+W) verscrollbar.config(command=canvas.yview) horiscrollbar.config(command=canvas.xview) # Making the canvas expandable root.grid_rowconfigure(0, weight=1) root.grid_columnconfigure(0, weight=1) # creating canvas contents frame = Frame(canvas) frame.rowconfigure(1, weight=1) frame.columnconfigure(1, weight=1) # Defining number of rows and columns rows = 20for i in range(1,rows): for j in range(1,9): button = Button(frame, padx=8, pady=8, text="[%d,%d]" % (i,j)) button.grid(row=i, column=j, sticky='news') # Creating canvas window canvas.create_window(0, 0, anchor=NW, window=frame) # Calling update_idletasks method frame.update_idletasks() # Configuring canvas canvas.config(scrollregion=canvas.bbox("all")) # Calling mainloop method root.mainloop() |
Output:
