Tk - Check Button Widget


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Tk check button is used to create multiple selectable items in the form of check boxes. The syntax for check button widget is shown below −

checkbutton checkbuttonName options

Options

The options available for the check button widget are listed below in the following table −

Sr.No. Syntax & Description
1

-font fontDescriptor

Used to set font for widget.

2

-height number

Used to set height for widget.

3

-command action

Sets the command action for button.

4

-text text

Sets the text for widget.

5

-width number

Sets the width for widget.

6

-variable variableName

Sets the variable for widget.

A simple Tk example for check button is shown below −

#!/usr/bin/wish

grid [label .myLabel1  -text "Range 20-30 not selected" -textvariable myLabelValue1 ] 
grid [checkbutton .chk1 -text "Range 20-30" -variable occupied1 -command {if {$occupied1 } {
   set myLabelValue1 {Range 20-30 selected}
} else {
   set myLabelValue1 {Range 20-30 not selected}
} }]
grid [label .myLabel2  -text "Range 30+ not selected" -textvariable myLabelValue2 ] 
grid [checkbutton .chk2 -text "Range 20-30" -variable occupied2 -command {if {$occupied2 } {
   set myLabelValue2 {Range 30+ selected}
} else {
   set myLabelValue2 {Range 30+ not selected}
} }]

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

Check Button Example

When we click the check button1 and check button2, we will get the following output −

Check Button Example Selected
tk_selection_widgets.htm
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