Table of Contents

checkbox - Create and manipulate a checkbox widget

Synopsis

checkbox pathName ?options?

Inheritance

itk::Widget <- labeledframe <- checkbox

Standard Options

background borderWidth cursor disabledForeground foreground relief selectColor

See the «options» manual entry for details on the standard

options.

Inherited Options

labelBitmap labelFont labelImage labelMargin

labelPos
labelText labelVariable

See the «labeledframe» class manual entry for details on the

inherited options.

Widget-specific Options

Name: command

Class: Command

Command-Line Switch: -command

Specifies a Tcl command procedure to be evaluated following a

change in the current check box selection.

Name: orient

Class: Orient

Command-Line Switch: -orient

Default Value: vertical

Specifies the orientation of the checkbuttons within the check-

box. Valid values are either «horizontal» or «vertical". _________________________________________________________________

Description

The checkbox command creates a check button box widget capable of

adding, inserting, deleting, selecting, and configuring checkbut- tons as well as obtaining the currently selected button.

Methods

The checkbox command creates a new Tcl command whose name is

pathName. This command may be used to invoke various operations on the widget. It has the following general form:

pathName option ?arg arg ...?

Option and the args determine the exact behavior of the command.

Many of the widget commands for the checkbox take as one argument

an indicator of which checkbutton of the checkbox to operate on.

These indicators are called indexes and allow reference and

manipulation of checkbuttons. Checkbox indexes may be specified in any of the following forms:

number
Specifies the checkbutton numerically, where 0 corresponds to the top checkbutton of the checkbox.
end
Indicates the last checkbutton of the checkbox.
pattern
If the index doesn't satisfy one of the above forms then this form is used. Pattern is pattern-matched against the tag of each checkbutton in the checkbox, in order from top to bottom, until a matching entry is found. The rules of Tcl_StringMatch are used.

Widget-specific Methods

pathName add tag ?option value option value?

Adds a new checkbutton to the checkbuttond window on the bottom.

The command takes additional options which are passed on to the

checkbutton as construction arguments. These include the stan- dard Tk checkbutton options. The tag is returned. pathName buttonconfigure index ?options?

This command is similar to the configure command, except that it

applies to the options for an individual checkbutton, whereas configureapplies to the options for the checkbox as a whole.

Options may have any of the values accepted by the add widget

command. If options are specified, options are modified as indi- cated in the command and the command returns an empty string. If no options are specified, returns a list describing the current options for entry index (see Tk_ConfigureInfo for information on the format of this list).
pathName cget option

Returns the current value of the configuration option given by

option. Option may have any of the values accepted by the check- box command.
pathName configure ?option? ?value option value ...?

Query or modify the configuration options of the widget. If no

option is specified, returns a list describing all of the avail- able options for pathName (see Tk_ConfigureInfo for information on the format of this list). If option is specified with no value, then the command returns a list describing the one named option (this list will be identical to the corresponding sublist of the value returned if no option is specified). If one or more option-value pairs are specified, then the command modifies the given widget option(s) to have the given value(s); in this case the command returns an empty string. Option may have any of the values accepted by the checkbox command.
pathName delete index

Deletes a specified checkbutton given an index.

pathName deselect index

Deselects a specified checkbutton given an index.

pathName flash index

Flashes a specified checkbutton given an index.

pathName get ?index?

Returns the tags of the currently selected checkbuttons or the

selection status of specific checkbutton when given an index. pathName index index

Returns the numerical index corresponding to index.

pathName insert index tag ?option value option value ...?

Same as the add command except that it inserts the new checkbut-

ton just before the one given by index, instead of appending to the end of the checkbox. The option, and value arguments have the same interpretation as for the add widget command. pathName select index

Selects a specified checkbutton given an index.

Example

checkbox .cb -labeltext Styles
.cb add bold -text Bold
.cb add italic -text Italic
.cb add underline -text Underline
.cb select underline

pack .cb -padx 10 -pady 10 -fill both -expand yes

Author

John A. Tucker

Keywords

checkbox, widget

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