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ttk_widget.3tk

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NAME

ttk::widget - Standard options and commands supported by Tk themed widgets

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DESCRIPTION

This manual describes common widget options and commands.

STANDARD OPTIONS

The following options are supported by all Tk themed widgets:

 
 Command-Line Name:-class
 Database Name:undefined
 Database Class:undefined
 

Specifies the window class. The class is used when querying the option database for the window's other options, to determine the default bindtags for the window, and to select the widget's default layout and style. This is a read-only option: it may only be specified when the window is created, and may not be changed with the configure widget command.

 
 Command-Line Name:-cursor
 Database Name:cursor
 Database Class:Cursor
 

Specifies the mouse cursor to be used for the widget. See Tk_GetCursor and cursors(3tk) in the Tk reference manual for the legal values. If set to the empty string (the default), the cursor is inherited from the parent widget.

 
 Command-Line Name:-takefocus
 Database Name:takeFocus
 Database Class:TakeFocus
 

Determines whether the window accepts the focus during keyboard traversal. Either 0, 1, a command prefix (to which the widget path is appended, and which should return 0 or 1), or the empty string. See options(3tk) in the Tk reference manual for the full description.

 
 Command-Line Name:-style
 Database Name:style
 Database Class:Style
 

May be used to specify a custom widget style.

SCROLLABLE WIDGET OPTIONS

The following options are supported by widgets that are controllable by a scrollbar. See scrollbar(3tk) for more information

 
 Command-Line Name:-xscrollcommand
 Database Name:xScrollCommand
 Database Class:ScrollCommand
 

A command prefix, used to communicate with horizontal scrollbars.

When the view in the widget's window changes, the widget will generate a Tcl command by concatenating the scroll command and two numbers. Each of the numbers is a fraction between 0 and 1 indicating a position in the document; 0 indicates the beginning, and 1 indicates the end. The first fraction indicates the first information in the widget that is visible in the window, and the second fraction indicates the information just after the last portion that is visible.
Typically the xScrollCommand option consists of the path name of a scrollbar widget followed by ``set'', e.g. ``.x.scrollbar set''. This will cause the scrollbar to be updated whenever the view in the window changes.
If this option is set to the empty string (the default), then no command will be executed.

 
 Command-Line Name:-yscrollcommand
 Database Name:yScrollCommand
 Database Class:ScrollCommand
 

A command prefix, used to communicate with vertical scrollbars. See the description of -xscrollcommand above for details.

LABEL OPTIONS

The following options are supported by labels, buttons, and other button-like widgets:

 
 Command-Line Name:-text
 Database Name:text
 Database Class:Text
 

Specifies a text string to be displayed inside the widget (unless overridden by -textvariable).

 
 Command-Line Name:-textvariable
 Database Name:textVariable
 Database Class:Variable
 

Specifies the name of variable whose value will be used in place of the -text resource.

 
 Command-Line Name:-underline
 Database Name:underline
 Database Class:Underline
 

If set, specifies the integer index (0-based) of a character to underline in the text string. The underlined character is used for mnemonic activation.

 
 Command-Line Name:-image
 Database Name:image
 Database Class:Image
 

Specifies an image to display. This is a list of 1 or more elements. The first element is the default image name. The rest of the list is a sequence of statespec / value pairs as per style map, specifying different images to use when the widget is in a particular state or combination of states. All images in the list should have the same size.

 
 Command-Line Name:-compound
 Database Name:compound
 Database Class:Compound
 

Specifies how to display the image relative to the text, in the case both -text and -image are present. Valid values are:

text

Display text only.

image

Display image only.

center

Display text centered on top of image.

top

bottom

left

right

Display image above, below, left of, or right of the text, respectively.

none

The default; display the image if present, otherwise the text.

 
 Command-Line Name:-width
 Database Name:width
 Database Class:Width
 

If greater than zero, specifies how much space, in character widths, to allocate for the text label. If less than zero, specifies a minimum width. If zero or unspecified, the natural width of the text label is used.

COMPATIBILITY OPTIONS

 
 Command-Line Name:-state
 Database Name:state
 Database Class:State
 

May be set to normal or disabled to control the disabled state bit. This is a write-only option: setting it changes the widget state, but the state widget command does not affect the -state option.

COMMANDS

pathName cget option

Returns the current value of the configuration option given by option.

pathName configure ?option? ?value option value ...?

Query or modify the configuration options of the widget. 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. If option is specified with no value, then the command returns a list describing the named option: the elements of the list are the option name, database name, database class, default value, and current value. If no option is specified, returns a list describing all of the available options for pathName.

pathName identify x y

Returns the name of the element under the point given by x and y, or an empty string if the point does not lie within any element. x and y are pixel coordinates relative to the widget.

pathName instate statespec ?script?

Test the widget's state. If script is not specified, returns 1 if the widget state matches statespec and 0 otherwise. If script is specified, equivalent to

 
 if {[pathName instate stateSpec]} script
 
 

pathName state ?stateSpec?

Modify or inquire widget state. If stateSpec is present, sets the widget state: for each flag in stateSpec, sets the corresponding flag or clears it if prefixed by an exclamation point.

Returns a new state spec indicating which flags were changed:

 
 set changes [pathName state spec]
 pathName state $changes
 
 

will restore pathName to the original state. If stateSpec is not specified, returns a list of the currently-enabled state flags.

WIDGET STATES

The widget state is a bitmap of independent state flags. Widget state flags include:

active

The mouse cursor is over the widget and pressing a mouse button will cause some action to occur. (aka ``prelight'' (Gnome), ``hot'' (Windows), ``hover'').

disabled

Widget is disabled under program control (aka ``unavailable'', ``inactive'')

focus

Widget has keyboard focus

pressed

Widget is being pressed (aka ``armed'' in Motif).

selected

``On'', ``true'', or ``current'' for things like checkbuttons and radiobuttons.

background

Windows and the Mac have a notion of an ``active'' or foreground window. The background state is set for widgets in a background window, and cleared for those in the foreground window.

readonly

Widget should not allow user modification.

alternate

A widget-specific alternate display format. For example, used for checkbuttons and radiobuttons in the ``tristate'' or ``mixed'' state, and for buttons with -default active.

invalid

The widget's value is invalid. (Potential uses: scale widget value out of bounds, entry widget value failed validation.)

hover

The mouse cursor is within the widget. This is similar to the active state; it is used in some themes for widgets that provide distinct visual feedback for the active widget in addition to the active element within the widget.

A state specification or stateSpec is a list of state names, optionally prefixed with an exclamation point (!) indicating that the bit is off.

EXAMPLES

 
 set b [ttk::button .b]
 
 # Disable the widget:
 $b state disabled
 
 # Invoke the widget only if it is currently pressed and enabled:
 $b instate {pressed !disabled} { .b invoke }
 
 # Reenable widget:
 $b state !disabled
 
 

SEE ALSO

ttk::intro(3tk), style(3tk)

KEYWORDS

state, configure, option