ttk::widget - Standard options and commands supported by Tk themed
widgets
This manual describes common widget options and commands.
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.
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.
The following options are supported by labels, buttons, and other
button-like widgets:
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: -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: -padding
Database Name: padding
Database Class: Padding
- Specifies the internal padding for the widget. The padding is a list of up
to four length specifications left top right bottom. If fewer than
four elements are specified, bottom defaults to top,
right defaults to left, and top defaults to
left. In other words, a list of three numbers specify the left,
vertical, and right padding; a list of two numbers specify the horizontal
and the vertical padding; a single number specifies the same padding all
the way around the widget.
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 a global 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: -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.
This option is only available for themed widgets that have
“corresponding” traditional Tk widgets.
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.
- 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 element 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. Some
widgets accept other identify subcommands.
- 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.
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.
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