21.13. The Scale Widget
Create a
"slider" widget representing a
numeric value with the Scale method.
$parent->Scale(options);
The standard configuration options that apply to
Scale are: -activebackground,
-background, -bg,
-borderwidth, -bw,
-cursor, -font,
-foreground, -fg,
-highlight-background,
-highlightcolor,
-highlightthickness, -relief,
-state, -takefocus, and
-width.
Other options are:
- -bigincrement => amount
-
The amount to change the slider
when using large increments. Default is 0, which
means 1/10 of the scale.
- -command => callback
-
Pointer to a function that will be
called for every incremental change in the slider.
- -digits => amount
-
The number of digits to keep when
converting from a number to a string.
- -from => n
-
Low end of the scale (default is
0).
- -label => string
-
The
string to use as a label for the slider.
- -length => amount
-
The length of the scale.
- -orient => direction
-
The
orientation of the slider. Values can be either
vertical (default) or
horizontal.
- -repeatdelay => milliseconds
-
Determines the number of milliseconds
to hold down an arrow before it auto-repeats. Default is
300.
- -repeatinterval => milliseconds
-
Determines the number of milliseconds
between auto-repeats once it is started. Default is
100.
- -resolution => value
-
The increments that the scale
will change by (default is 1).
- -showvalue => boolean
-
Whether to show the current value of the
slider (default is 1).
- -sliderlength => amount
-
The size of the slider. Default
is 25 pixels.
- -tickinterval => n
-
The number of
"ticks" to display for the slider
(default is 0).
- -to => n
-
The top value of the scale (default is
100).
- -troughcolor => color
-
Changes the color of the trough.
- -variable => \$variable
-
Assigns the value of the slider to the
specified variable.
21.13.1. Scale Methods
In addition to configure and
cget, the following methods are defined for the
Scale widget:
- get
-
Returns the current value if given no
arguments. If given x and y coordinates as the first and second
arguments, returns the value of the scale at that position.
- set
-
Assigns the value associated with the
scale.
- coords
-
Returns the x and y coordinates
associated with the value given in the first argument.
- identify
-
Returns "slider",
"trough1", "trough2", or
"", depending on which part of the scale
corresponds to the given x, y coordinates.
 |  |  |
| 21.12. The Canvas Widget |  | 21.14. The Menubutton Widget |
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