40.3.2 Types of Widget

In Tcl/Tk there are currently 15 types of widget. In alphabetical order they are (see also library('tcltk/examples/widgets.tcl')):

button

a simple press button

canvas

is a container for displaying “drawn” objects such as lines, circles, and polygons.

checkbutton

a button that hold a state of either on or off

entry

a text entry field

frame

a widget that is a container for other widgets

label

a simple label

listbox

a box containing a list of options

menu

a widget for creating menu bars

menubutton

a button, which when pressed offers a selection of choices

message

a multi-line text display widget

radiobutton

a button used to form groups of mutually interacting buttons (When one button is pressed down, the others pop up.)

scale

is like a slider on a music console. It consists of a trough scale and a slider. Moving the slider to a position on the scale sets the overall value of the widget to that value.

scollbar

used to add scrollbars to windows or canvases. The scrollbar has a slider, which when moved changes the value of the slider widget.

text

a sophisticated multi-line text widget that can also display other widgets such as buttons

toplevel

for creating new standalone toplevel windows. (These windows are containers for other widgets. They are not terminal windows.)