Provided by: tklib_0.6-1_all bug

NAME

       controlwidget - Collection of widgets for displaying and controlling numerical values

SYNOPSIS

       package require Tcl  ?8.5?

       package require Tk  ?8.5?

       package require snit  ?2.0?

       package require controlwidget  ?0.1?

       ::controlwidget::meter w args

       ::controlwidget::slider w args

       ::controlwidget::equalizerBar w args

       ::controlwidget::thermometer w args

       ::controlwidget::voltmeter w args

       ::controlwidget::tachometer w args

       ::controlwidget::rdial w args

       $widget get

       $widget set value

       ::controlwidget::led w args

       ::controlwidget::radioMatrix w args

       $led on

       $led off

       $led setstate state

       $matrix get

       $matrix set index

_________________________________________________________________

DESCRIPTION

       The  controlwidget  package  focuses  on  the display and interactive control of numerical
       values.  It mimicks several of the meters and controls found in  laboratory  settings  but
       also  daily  life: volt meters, equalizers and tachometers to name a few. They can be seen
       as alternatives for the scale widget.

       Note: The package has not sofar been  tested  extensively,  and  that  may  result  in  an
       unexpected  appearance if you use sizes that are different than the defaults. Also not all
       options for the coloring of the various parts and fonts and so on  have  been  tested,  so
       that may be another source of bugs.

       A  last  note: some parts have not been included in any option, most notably the colors of
       parts that require lighter and darker shades to cooperate.

TYPES OF WIDGETS

       The package distinguishes several typed of widgets:

       •      Vertical meters: the value of the variable is translated into a vertical  position,
              like with the coloured bars you find on your stereo installation.

       •      Angle displays: the value of the variable is related to the angle of a needle, like
              with tachometers.

       •      Interactive widgets: most widgets allow you to change the value of the variable  by
              pressing  the  mouse  button  on the needle and shifting it up and down or left and
              right.

       •      Non-interactive widgets: some widgets, like the thermometer widget,  do  not  allow
              such interaction.

       •      Logical  or  choice  widgets:  some widgets display the values as either on/off (or
              true/false) or as one of a set of discrete choices.

       All widgets have in common, however, that you can connect them  to  a  variable  and  that
       changing  the  variable changes the display. Forthermore, all widgets have the set and get
       methods to interact with the value that the widget displays (whether that is stored  in  a
       global variable or not).

       They  also have in common that their appearance and behaviour is determined by one or more
       options that you can set at creation time and often later on as well. The widgets are  all
       based on the snit package, so that the methods configure and cget are available to set and
       get these options.

COMMANDS

       Currently the package contains these widgets of the vertical meter type:

       ::controlwidget::meter w args
              Create a vertical meter consisting of an axis and a moveable arrow.

              widget w (in)
                     Name of the widget to be created.

              arguments args (in)
                     List of key-value pairs, controlling the appearance  and  behaviour  of  the
                     widget:

                     variable name
                            Name of the variable to be associated with the meter

                     background color
                            Background color for the widget

                     height pixels
                            Height of the widget

                     width pixels
                            Width of the widget

                     arrowthickness pixels
                            Thickness of the displayed arrow in pixels

                     arrowcolor color
                            Color of the displayed arrow

                     readonly boolean
                            Whether the arrow can be moved interactively or not

       ::controlwidget::slider w args
              Create  a widget containing one or more vertical sliders and an axis. You can shift
              the slider handles interactively via the mouse.

              widget w (in)
                     Name of the widget to be created.

              arguments args (in)
                     List of key-value pairs, controlling the appearance  and  behaviour  of  the
                     widget:

                     variable name
                            Name of the (list) variable to be associated with the widget

                     number integer
                            Number of sliders in the widget

                     background color
                            Background color for the widget

                     height pixels
                            Height of the widget

                     width pixels
                            Width of the widget

                     sliderthickness pixels
                            Thickness of the slider handles

                     sliderwidth color
                            Width of the slider handles

                     troughwidth color
                            Width of the troughs holding the sliders

       ::controlwidget::equalizerBar w args
              Create a widget containing one or more vertical bars resembling those found on hifi
              graphical equalizers.  Note that it is a read-only widget.

              widget w (in)
                     Name of the widget to be created.

              arguments args (in)
                     List of key-value pairs, controlling the appearance  and  behaviour  of  the
                     widget:

                     variable name
                            Name of the (list) variable to be associated with the widget

                     number integer
                            Number of bars in the widget

                     background color
                            Background color for the widget

                     height pixels
                            Height of the widget

                     width pixels
                            Width of the widget

                     barwidth pixels
                            Width of the bars

                     segments integer
                            Number of segments the bars are divided in

                     safecolor color
                            Color for values lower than the warning level

                     warningcolor color
                            Color for values greater than the warning level

                     warninglevel double
                            Threshold value, determines at what level the color changes

       ::controlwidget::thermometer w args
              Create a thermometer widget (read-only)

              widget w (in)
                     Name of the widget to be created.

              arguments args (in)
                     List  of  key-value  pairs,  controlling the appearance and behaviour of the
                     widget:

                     variable name
                            Name of the (list) variable to be associated with the widget

                     background color
                            Background color for the widget

                     height pixels
                            Height of the widget

                     width pixels
                            Width of the widget

                     linethickness pixels
                            Thickness of the line representing the "temperature"

                     linecolor color
                            Color of the line

       These widgets all use a vertical axis  and  have  the  following  options  in  common  for
       configuring the axis:

       axisformat string
              Format string for formatting the numbers along the axis

       axisfont string
              Name of the font to be used for the numbers

       axiscolor color
              Color of the axis (including the numbers)

       from color
              Lower value for the axis

       to color
              Upper value for the axis

       majorticks integer
              Number of major tickmarks to draw (each is labelled)

       minorticks integer
              Number of minor tickmarks to draw between two major tickmarks

       log boolean
              Use a logarithmic axis (true) or a linear axis (false)

       The package contains the following widget based on angle displays:

       ::controlwidget::voltmeter w args
              Create a voltmeter-like widget.

              widget w (in)
                     Name of the widget to be created.

              arguments args (in)
                     List  of  key-value  pairs,  controlling the appearance and behaviour of the
                     widget:

                     variable name
                            Name of the variable to be associated with the meter

                     value value
                            Value for the meter (if not associated with a variable)

                     min value
                            The minimum value for data in the display

                     max value
                            The maximum value for data in the display

                     labels list
                            The labels to be shown along the scale. (These are simply  considered
                            texts, so no relation with the minimum and maximum perse)

                     title string
                            String to be shown below the dial

                     width pixels
                            The width of the widget

                     height pixels
                            The height of the widget

                     borderwidth pixels
                            The width of the border surrounding the entire widget

                     relief string
                            The relief of the border surrounding the entire widget

                     highlightthickness pixels
                            The width of the border to indicate the widget has keyboard focus

                     labelfont fontname
                            Font of the labels to the scale

                     titlefont fontname
                            Font of the title below the dial

                     dialcolor color
                            Color of the dial holding the needle

                     needlecolor color
                            Color of the needle

                     scalecolor color
                            Color of the scale (arc and tickmarks)

                     labelcolor color
                            Color of the labels to the scale

                     titlecolor color
                            Color of the title below the dial

       ::controlwidget::tachometer w args
              Create a tachometer-like widget.

              widget w (in)
                     Name of the widget to be created.

              arguments args (in)
                     List  of  key-value  pairs,  controlling the appearance and behaviour of the
                     widget. In addition to the ones given for the voltmeter widget:

                     variable name
                            Name of the variable to be associated with the meter

                     value value
                            Value for the meter (if not associated with a variable)

                     dangerlevel value
                            Level above which values are indicated with a different color

                     dangercolor color
                            Color for the values above the "danger level"

                     dangerwidth pixels
                            Width for the colored band indicating the "danger level"

                     pincolor color
                            Color for the needle and the pin

       ::controlwidget::rdial w args
              Create a rotating dial. You can drag the dial to change the value. With  the  shift
              button  depressed  the  value  changes slowly, with the control button depressed it
              changes fast.

              widget w (in)
                     Name of the widget to be created.

              arguments args (in)
                     List of key-value pairs, controlling the appearance  and  behaviour  of  the
                     widget:

                     variable name
                            Name of the variable to be associated with the dial

                     value value
                            Value for the dial (if not associated with a variable)

                     orient string
                            Whether  a  horizontal  disk/dial  is  required  ("horizontal")  or a
                            vertical one ("vertical")

                     step value
                            Initial step for incrementing or decrementing the value

                     slow value
                            Factor on the step size for incrementing or  decrementing  the  value
                            slowly

                     fast value
                            Factor  on  the  step size for incrementing or decrementing the value
                            fast

                     scale value
                            Scale value to be applied to the actual value

                     callback command
                            Command to be called when the value changes

                     width pixels
                            The width of the widget

                     height pixels
                            The height of the widget

                     background color
                            The background color of the widget (coloring of the disk/dial)

                     foreground color
                            The foreground color of the widget (the marker lines)

       All these widgets have the following methods:

       $widget get
              Return the current value or values shown in the widget

       $widget set value
              Reset the value or values shown in the widget. If the widget is associated  with  a
              variable, that variable is set as well.

              value double/list
                     New value or values for the widget

       Two further widgets are available, meant to display logical values:

       ::controlwidget::led w args
              Create a LED-like widget.

              widget w (in)
                     Name of the widget to be created.

              arguments args (in)
                     List  of  key-value  pairs,  controlling the appearance and behaviour of the
                     widget. In addition to the ones given for the voltmeter widget:

                     variable name
                            Name of the variable to be associated with the LED

                     size pixels
                            Diameter of the LED widget

                     on color
                            Color to use for the "on" state

                     off color
                            Color to use for the "off" state

       ::controlwidget::radioMatrix w args
              Create a matrix of radio buttons that behaves as a single widget.

              widget w (in)
                     Name of the widget to be created.

              arguments args (in)
                     List of key-value pairs, controlling the appearance  and  behaviour  of  the
                     widget. In addition to the ones given for the voltmeter widget:

                     variable name
                            Name of the variable to be associated with the matrix

                     orient string
                            The  way the radio buttons are to be arranged (horizontal or vertical
                            first)

                     rows integer
                            Number of rows in the matrix

                     columns integer
                            Number of columns in the matrix

                     command list
                            Command associated with the radio buttons. Invoked  when  the  active
                            radio button changes.

       The LED widget has the following public methods:

       $led on
              Set the state to "on"

       $led off
              Set the state to "off"

       $led setstate state
              Set the state according to the value of "state"

              state boolean (in)
                     New state for the LED widget

       The radioMatrix widget has two public methods:

       $matrix get
              Return the index of the currently selected radio button

       $matrix set index
              Select the radio button with index "index"

              index integer
                     Index of the radio button to be set

ACKNOWLEDGMENTS

       The code for most of these widgets first appeared on the Wiki. In many cases, Arjen Markus
       merely refactored the code a bit and "snitified" some  of  them.  The  original  code  was
       developed by the following people:

       •      Vertical meter, LED display, radio matrix: Ron Fox

       •      Rotating dials: Gerhard Reithofer

       •      Voltmeter and tachometer: Marco Maggi

       •      Code for moving the needle: ?

KEYWORDS

       controlling, displaying, numerical values, scale widget

COPYRIGHT

       Copyright (c) 2010 Ron Fox <rfox@...>
       Copyright (c) 2010 Gerhard Reithofer <...@...>
       Copyright (c) 2010 Marco Maggi <...@...>
       Copyright (c) 2010 Arjen Markus <arjenmarkus@users.sourceforge.net>