TmSgiThumbWheel(3Tm)

NAME
     TmThumbWheel - the SGI sgThumbWheel widget class

SYNOPSIS
     sgiThumbWheel  pathName [options]


DESCRIPTION
     This is the tcl binding to the SGI ThumbWheel widget.


CLASSES
     The class name for resource files is sgThumbWheel. Resources are
     inherited from TmPrimitive, TmCore. Methods are inherited from TmCore.


RESOURCES
     New resources for this class are:

          homePosition
          maximum
          minimum
          angleRange
          unitsPerRotation
          orientation
          showHomeButton
          value
          valueChangedCallback
          dragCallback


     homePosition
          Specifies the "known value" to which the thumb wheel's value is set
          when the home button is clicked.


     maximum
          Specifies the thumb wheel's maximum value.  maximum must be greater
          than or equal to minimum. Setting maximum equal to minimum indicates
          an infinite range.


     minimum
          Specifies the thumb wheel's minimum value.  maximum must be greater
          than or equal to minimum. Setting maximum equal to minimum indicates
          an infinite range.


     angleRange
          Specifies the angular range, in degrees, through which the thumb
          wheel is allowed to rotate.  This, in conjunction with maximum and
          minimum, controls the fineness or coarseness of the wheel control
          when it is not infinite.  If set to zero, the thumb wheel has an
          infinite range.

          The default of 150 represents roughly the visible amount of the
          wheel.  Thus clicking at one end of the wheel and dragging the mouse
          to the other end would give roughly the entire range from minimum to
          maximum.


     unitsPerRotation
          Specifies the change in value when the wheel is rotated one full
          turn around.  This controls the fineness or coarseness of the wheel
          control when the range is infinite.


     orientation
          Displays ThumbWheel vertically or horizontally.  This resource can
          have values of vertical and horizontal.


     showHomeButton
          Specifies whether a home button should be displayed next to the
          slider.  If the value is True, the home button is displayed.


     value
          Specifies the current position of the thumb wheel, between minimum
          and maximum if the thumb wheel is not infinite.


     valueChangedCallback
          Specifies the list of callbacks that is called when the value of the
          thumb wheel has changed.  The reason sent by the callback is
          value_changed.


     dragCallback
          Specifies the list of callbacks that is called when the wheel
          position changes as the wheel is being spun.  The reason sent by the
          callback is drag.


EXPANSIONS
     The %value is expanded into an integer between minimum and maximum when
     not infinite.