mega widgets include many complex widgets which is often required in some large scale tk applications. the list of available mega widgets are as shown below −

sr.no.	widget & description
1	dialog widget for displaying dialog boxes.
2	spinbox widget that allows users to choose numbers.
3	combobox widget that combines an entry with a list of choices available to the use.
4	notebook tabbed widget that helps to switch between one of several pages, using an index tab.
5	progressbar widget to provide visual feedback to the progress of a long operation like file upload.
6	treeview widget to display and allow browsing through a hierarchy of items more in form of tree.
7	scrollbar scrolling widgets without a text or canvas widgets.
8	scale scale widget to choose a numeric value through sliders.

a simple tk example is shown below using some mega widgets.

#!/usr/bin/wish

ttk::treeview .tree -columns "creator year" -displaycolumns "year creator" 
.tree heading creator -text "creator" -anchor center
.tree heading year -text "year" -anchor center
pack .tree
.tree insert {} end -id languages -text "languages"
.tree insert languages end -text c -values [list "dennis ritchie" "1990"]
proc scaleme {mywidget scalevalue} {
   $mywidget configure -length $scalevalue
} 
pack [scale .s2  -from 100.0 -to 200.0 -length 100 -background yellow -borderwidth 5
   -font{helvetica -18 bold} -foreground red -width 40 -relief ridge -orien horizontal
   -variable a -command "scaleme .s2" ]
pack [ttk::progressbar .p1 -orient horizontal -length 200 -mode indeterminate -value 90]
pack [ttk::progressbar .p2 -orient horizontal -length 200 -mode determinate -variable a
   -maximum 75 -value 20]

when we run the above program, we will get the following output −

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