ttk::scale - Create and manipulate a scale widget
ttk::scale pathName ?options...?
A ttk::scale widget is typically used to control the
numeric value of a linked variable that varies uniformly over some range. A
scale displays a slider that can be moved along over a trough,
with the relative position of the slider over the trough indicating the
value of the variable.
-class -cursor -style
-takefocus
See the ttk_widget manual entry for details on the standard
options.
Command-Line Name: -command
Database Name: command
Database Class: Command
- Specifies the prefix of a Tcl command to invoke whenever the scale's value
is changed via a widget command. The actual command consists of this
option followed by a space and a real number indicating the new value of
the scale.
Command-Line Name: -from
Database Name: from
Database Class: From
- A real value corresponding to the left or top end of the scale.
Command-Line Name: -length
Database Name: length
Database Class: Length
- Specifies the desired long dimension of the scale in screen units (i.e.
any of the forms acceptable to Tk_GetPixels). For vertical scales
this is the scale's height; for horizontal scales it is the scale's
width.
Command-Line Name: -orient
Database Name: orient
Database Class: Orient
- Specifies which orientation whether the widget should be laid out
horizontally or vertically. Must be either horizontal or
vertical or an abbreviation of one of these.
Command-Line Name: -to
Database Name: to
Database Class: To
- Specifies a real value corresponding to the right or bottom end of the
scale. This value may be either less than or greater than the -from
option.
Command-Line Name: -value
Database Name: value
Database Class: Value
- Specifies the current floating-point value of the variable. If
-variable is set to an existing variable, specifying -value
has no effect (the variable value takes precedence).
Command-Line Name: -variable
Database Name: variable
Database Class: Variable
- Specifies the name of a global variable to link to the scale. Whenever the
value of the variable changes, the scale will update to reflect this
value. Whenever the scale is manipulated interactively, the variable will
be modified to reflect the scale's new value.
In addition to the standard cget, configure,
identify element, instate, state and style
commands (see ttk::widget), scale widgets support the following
additional commands:
- pathName get
?x y?
- Get the current value of the -value option, or the value
corresponding to the coordinates x,y if they are specified.
X and y are pixel coordinates relative to the scale widget
origin.
- pathName
set value
- Set the value of the widget (i.e. the -value option) to
value. The value will be clipped to the range given by the
-from and -to options. Note that setting the linked variable
(i.e. the variable named in the -variable option) does not cause
such clipping.
- pathName
coords ?value?
- Get the coordinates corresponding to value, or the coordinates
corresponding to the current value of the -value option if
value is omitted.
The class name for a ttk::scale is TScale.
Dynamic states: active.
TScale styling options configurable with ttk::style
are:
-background color
-borderwidth amount
-darkcolor color
-groovewidth amount
-lightcolor color
-sliderwidth amount
-troughcolor color
-troughrelief relief
Some options are only available for specific themes.
See the ttk::style manual page for information on how to
configure ttk styles.
scale, slider, trough, widget