scale(3Tk) scale(3Tk)
scale - Create and manipulate scale widgets
scale pathName ?options?
activeBackground font highlightThickness repeatInterval|
background foreground orient takeFocus |
borderWidth highlightBackground relief troughColor |
cursor highlightColor repeatDelay
See the ``options'' manual entry for details on the standard options.
WIDGET-SPECIFIC OPTIONS
Name: bigIncrement
Class: BigIncrement
Command-Line Switch:-bigincrement
Some interactions with the scale cause its value to change by |
``large'' increments; this option specifies the size of the large |
increments. If specified as 0, the large increments default to 1/10|
the range of the scale.
Name: command
Class: Command
Command-Line Switch:-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.
Name: digits
Class: Digits
Command-Line Switch:-digits
An integer specifying how many significant digits should be retained|
when converting the value of the scale to a string. If the number |
is less than or equal to zero, then the scale picks the smallest |
value that guarantees that every possible slider position prints as |
a different string.
Name: from
Class: From
Command-Line Switch:-from
A real value corresponding to the left or top end of the scale.
Name: label
Class: Label
Command-Line Switch:-label
Page 1
scale(3Tk) scale(3Tk)
A string to display as a label for the scale. For vertical scales
the label is displayed just to the right of the top end of the
scale. For horizontal scales the label is displayed just above the
left end of the scale. If the option is specified as an empty
string, no label is displayed.
Name: length
Class: Length
Command-Line Switch:-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.
Name: resolution |
Class: Resolution |
Command-Line Switch:-resolution |
A real value specifying the resolution for the scale. If this value|
is greater than zero then the scale's value will always be rounded |
to an even multiple of this value, as will tick marks and the |
endpoints of the scale. If the value is less than zero then no |
rounding occurs. Defaults to 1 (i.e., the value will be integral).
Name: showValue
Class: ShowValue
Command-Line Switch:-showvalue
Specifies a boolean value indicating whether or not the current
value of the scale is to be displayed.
Name: sliderLength
Class: SliderLength
Command-Line Switch:-sliderlength
Specfies the size of the slider, measured in screen units along the
slider's long dimension. The value may be specified in any of the
forms acceptable to Tk_GetPixels.
Name: state
Class: State
Command-Line Switch:-state
Specifies one of three states for the scale: normal, active, or |
disabled. If the scale is disabled then the value may not be |
changed and the scale won't activate. If the scale is active, the |
slider is displayed using the color specified by the |
activeBackground option.
Page 2
scale(3Tk) scale(3Tk)
Name: tickInterval
Class: TickInterval
Command-Line Switch:-tickinterval
Must be a real value. Determines the spacing between numerical tick
marks displayed below or to the left of the slider. If 0, no tick
marks will be displayed.
Name: to
Class: To
Command-Line Switch:-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.
Name: variable
Class: Variable
Command-Line Switch:-variable
Specifies the name of a global variable to link to the scale.
Whenever the value of the variable changes, the scale will upate to
reflect this value. Whenever the scale is manipulated
interactively, the variable will be modified to reflect the scale's
new value.
Name: width
Class: Width
Command-Line Switch:-width
Specifies the desired narrow dimension of the trough in screen units
(i.e. any of the forms acceptable to Tk_GetPixels). For vertical
scales this is the trough's width; for horizontal scales this is
the trough's height.
The scale command creates a new window (given by the pathName argument)
and makes it into a scale widget. Additional options, described above,
may be specified on the command line or in the option database to
configure aspects of the scale such as its colors, orientation, and
relief. The scale command returns its pathName argument. At the time
this command is invoked, there must not exist a window named pathName,
but pathName's parent must exist.
A scale is a widget that displays a rectangular trough and a small
slider. The trough corresponds to a range of real values (determined by
the from, to, and resolution options), and the position of the slider
selects a particular real value. The slider's position (and hence the
scale's value) may be adjusted with the mouse or keyboard as described in|
the BINDINGS section below. Whenever the scale's value is changed, a Tcl
command is invoked (using the command option) to notify other interested
Page 3
scale(3Tk) scale(3Tk)
widgets of the change. In addition, the value of the scale can be linked
to a Tcl variable (using the variable option), so that changes in either
are reflected in the other.
Three annotations may be displayed in a scale widget: a label appearing
at the top right of the widget (top left for horizontal scales), a number
displayed just to the left of the slider (just above the slider for
horizontal scales), and a collection of numerical tick marks just to the
left of the current value (just below the trough for horizontal scales).
Each of these three annotations may be enabled or disabled using the
configuration options.
The scale 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. The
following commands are possible for scale widgets:
pathName cget option
Returns the current value of the configuration option given by |
option. Option may have any of the values accepted by the scale |
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 available
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 scale command.
pathName coords ?value?
Returns a list whose elements are the x and y coordinates of the |
point along the centerline of the trough that corresponds to value. |
If value is omitted then the scale's current value is used.
pathName get ?x y?
If x and y are omitted, returns the current value of the scale. If |
x and y are specified, they give pixel coordinates within the |
widget; the command returns the scale value corresponding to the |
given pixel. Only one of x or y is used: for horizontal scales y |
is ignored, and for vertical scales x is ignored.
Page 4
scale(3Tk) scale(3Tk)
pathName identify x y
Returns a string indicating what part of the scale lies under the |
coordinates given by x and y. A return value of slider means that |
the point is over the slider; trough1 means that the point is over |
the portion of the slider above or to the left of the slider; and |
trough2 means that the point is over the portion of the slider below|
or to the right of the slider. If the point isn't over one of these|
elements, an empty string is returned.
pathName set value
This command is invoked to change the current value of the scale,
and hence the position at which the slider is displayed. Value
gives the new value for the scale. The command has no effect if the
scale is disabled.
Tk automatically creates class bindings for scales that give them the
following default behavior. Where the behavior is different for vertical
and horizontal scales, the horizontal behavior is described in
parentheses.
[1] If button 1 is pressed in the trough, the scale's value will be |
incremented or decremented by the value of the resolution option so |
that the slider moves in the direction of the cursor. If the button |
is held down, the action auto-repeats.
[2] If button 1 is pressed over the slider, the slider can be dragged
with the mouse.
[3] If button 1 is pressed in the trough with the Control key down, the
slider moves all the way to the end of its range, in the direction
towards the mouse cursor.
[4] The Up and Left keys move the slider up (left) by the value of the
resolution option.
[5] The Down and Right keys move the slider down (right) by the value of
the resolution option.
[6] Control-Up and Control-Left move the slider up (left) by the value
of the bigIncrement option.
[7] Control-Down and Control-Right move the slider down (right) by the
value of the bigIncrement option.
[8] Home moves the slider to the top (left) end of its range.
[9] End moves the slider to the bottom (right) end of its range.
Page 5
scale(3Tk) scale(3Tk)
If the scale is disabled using the state option then none of the above
bindings have any effect.
The behavior of scales can be changed by defining new bindings for
individual widgets or by redefining the class bindings.
scale, slider, trough, widget
Page 6
SCALE(3I) Last changed: 3-2-98
SCALE - Returns (x)(b**i), where b is the base in the real number
model representation of x
SCALE ([X=]x, [I=]i)
UNICOS, UNICOS/mk, and IRIX systems
Fortran 90
The SCALE intrinsic function returns
i
(x)(b ), where b is the base in the real number model representation
of x. For more information on the real number model, see the
MODELS(3I) man page. It accepts the following arguments:
x Must be of type real
i Must be of type integer
SCALE is an elemental function. The name of this intrinsic cannot be
passed as an argument.
This routine is implemented on CRAY T90 systems that support IEEE
arithmetic by calls to scalar-only library routines.
The result type and type parameter are the same as x. The result has
the value
i
(x)(b ), where b is defined in the model for real numbers representing
values of x, provided that this result is within range. Argument i
should be within the range of MINEXPONENT(x) <= i <= MAXEXPONENT(x).
If i is outside this range, the results are unpredictable.
SCALE (3.0, 2) has the value 12.0 for reals.
MODELS(3I)
Intrinsic Procedures Reference Manual, publication SR-2138, for the
printed version of this man page.
scale(3G) scale(3G)
scale - scales and mirrors the current matrix
void scale(x, y, z)
float x, y, z;
x expects the scale factor in the x direction.
y expects the scale factor in the y direction.
z expects the scale factor in the z direction.
scale modifies the current matrix, causing it to shrink, expand, or
mirror coordinates that it transforms. Values with a magnitude greater
than 1 result in expansion; values with a magnitude less than 1 cause
shrinkage. Negative values result in mirrored coordinates.
The x, y, and z scale factors are used to compute a 4x4 scale matrix,
which then premultiplies the current matrix, as specified by mmode. Thus
if T is the current matrix, and S is the matrix computed by scale, T is
replaced with S*T.
The current matrix is the top matrix on the transformation stack if mmode
is MSINGLE, the top matrix on the ModelView matrix stack if mmode is
MVIEWING, the Projection matrix if mmode is MPROJECTION, or the Texture
matrix if mmode is MTEXTURE.
All objects drawn after scale is called while mmode is either MSINGLE or
MVIEWING are scaled. Use pushmatrix and popmatrix to preserve and
restore the unscaled coordinate system.
mmode, popmatrix, pushmatrix, rotate, translate
Matrices that negate coordinates, such as scale (-1.0, 1.0, 1.0), reverse
the directional order of a polygon's points and can cause the opposite of
what is intended.
Page 1
SCALE(3I) Last changed: 3-2-98
SCALE - Returns (x)(b**i), where b is the base in the real number
model representation of x
SCALE ([X=]x, [I=]i)
UNICOS, UNICOS/mk, and IRIX systems
Fortran 90
The SCALE intrinsic function returns
i
(x)(b ), where b is the base in the real number model representation
of x. For more information on the real number model, see the
MODELS(3I) man page. It accepts the following arguments:
x Must be of type real
i Must be of type integer
SCALE is an elemental function. The name of this intrinsic cannot be
passed as an argument.
This routine is implemented on CRAY T90 systems that support IEEE
arithmetic by calls to scalar-only library routines.
The result type and type parameter are the same as x. The result has
the value
i
(x)(b ), where b is defined in the model for real numbers representing
values of x, provided that this result is within range. Argument i
should be within the range of MINEXPONENT(x) <= i <= MAXEXPONENT(x).
If i is outside this range, the results are unpredictable.
SCALE (3.0, 2) has the value 12.0 for reals.
MODELS(3I)
Intrinsic Procedures Reference Manual, publication SR-2138, for the
printed version of this man page.
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