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 – tkinterWidgets 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(), andplace(). All these methods have different roles.
Now, lets discuss about the topicAutohiding 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# Python program to illustrate the usage of# autohiding scrollbars using tkinter# Importing tkinterfromtkinterimport*# Creating class AutoScrollbarclassAutoScrollbar(Scrollbar):# Defining set method with all# its parameterdefset(self,low,high):iffloat(low)<=0.0andfloat(high)>=1.0:# Using grid_removeself.tk.call("grid","remove",self)else:self.grid()Scrollbar.set(self,low,high)# Defining pack methoddefpack(self,**kw):# If pack is used it throws an errorraise(TclError,"pack cannot be used with\ this widget")# Defining place methoddefplace(self,**kw):# If place is used it throws an errorraise(TclError,"place cannot be used with\ this widget")# creating tkinter windowroot=Tk()# Defining vertical scrollbarverscrollbar=AutoScrollbar(root)# Calling grid method with all its# parameter w.r.t vertical scrollbarverscrollbar.grid(row=0,column=1,sticky=N+S)# Defining horizontal scrollbarhoriscrollbar=AutoScrollbar(root,orient=HORIZONTAL)# Calling grid method with all its# parameter w.r.t horizontal scrollbarhoriscrollbar.grid(row=1,column=0,sticky=E+W)# Creating scrolled canvascanvas=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 expandableroot.grid_rowconfigure(0,weight=1)root.grid_columnconfigure(0,weight=1)# creating canvas contentsframe=Frame(canvas)frame.rowconfigure(1,weight=1)frame.columnconfigure(1,weight=1)# Defining number of rows and columnsrows=20foriinrange(1,rows):forjinrange(1,9):button=Button(frame,padx=8,pady=8,text="[%d,%d]"%(i,j))button.grid(row=i,column=j,sticky='news')# Creating canvas windowcanvas.create_window(0,0,anchor=NW,window=frame)# Calling update_idletasks methodframe.update_idletasks()# Configuring canvascanvas.config(scrollregion=canvas.bbox("all"))# Calling mainloop methodroot.mainloop()