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NAME

       cdk_uscale - curses scale widget (type unsigned).

SYNOPSIS

       cc [ flag ... ] file ...  -lcdk [ library ... ]

       #include <cdk/cdk.h>

       unsigned activateCDKUScale (
                      CDKUSCALE *scale,
                      chtype *actions);

       void destroyCDKUScale (
                      CDKUSCALE *scale);

       void drawCDKUScale (
                      CDKUSCALE *scale,
                      boolean box);

       void eraseCDKUScale (
                      CDKUSCALE *scale);

       boolean getCDKUScaleBox (
                      CDKUSCALE *scale);

       unsigned getCDKUScaleHighValue (
                      CDKUSCALE *scale);

       unsigned getCDKUScaleLowValue (
                      CDKUSCALE *scale);

       unsigned getCDKUScaleValue (
                      CDKUSCALE *scale);

       int injectCDKUScale (
                      CDKUSCALE *scale,
                      chtype input);

       void moveCDKUScale (
                      CDKUSCALE *scale,
                      int xpos,
                      int ypos,
                      boolean relative,
                      boolean refresh);

       CDKUSCALE *newCDKUScale (
                      CDKSCREEN *cdkscreen,
                      int xpos,
                      int ypos,
                      char *title,
                      char *label,
                      chtype fieldAttribute,
                      int fieldWidth,
                      unsigned currentValue,
                      unsigned lowValue,
                      unsigned highValue,
                      unsigned increment,
                      unsigned fastIncrement,
                      boolean box,
                      boolean shadow);

       void positionCDKUScale (
                      CDKUSCALE *scale);

       void setCDKUScale (
                      CDKUSCALE *scale,
                      unsigned lowValue,
                      unsigned highValue,
                      unsigned currentValue,
                      boolean box);

       void setCDKUScaleBackgroundAttrib (
                      CDKUSCALE *scale,
                      chtype attribute);

       void setCDKUScaleBackgroundColor (
                      CDKUSCALE *scale,
                      char * color);

       void setCDKUScaleBox (
                      CDKUSCALE *scale,
                      boolean box);

       void setCDKUScaleBoxAttribute (
                      CDKUSCALE *scale,
                      chtype character);

       void setCDKUScaleHorizontalChar (
                      CDKUSCALE *scale,
                      chtype character);

       void setCDKUScaleLLChar (
                      CDKUSCALE *scale,
                      chtype character);

       void setCDKUScaleLRChar (
                      CDKUSCALE *scale,
                      chtype character);

       void setCDKUScaleLowHigh (
                      CDKUSCALE *scale,
                      unsigned low,
                      unsigned high);

       void setCDKUScalePostProcess (
                      CDKUSCALE *scale,
                      PROCESSFN callback,
                      void * data);

       void setCDKUScalePreProcess (
                      CDKUSCALE *scale,
                      PROCESSFN callback,
                      void * data);

       void setCDKUScaleULChar (
                      CDKUSCALE *scale,
                      chtype character);

       void setCDKUScaleURChar (
                      CDKUSCALE *scale,
                      chtype character);

       void setCDKUScaleValue (
                      CDKUSCALE *scale,
                      unsigned value);

       void setCDKUScaleVerticalChar (
                      CDKUSCALE *scale,
                      chtype character);

DESCRIPTION

       The  Cdk  scale  widget  creates  a  scale box with a label and a scale
       field.  The following functions create or manipulate the Cdk scale  box
       widget.

AVAILABLE FUNCTIONS

       activateCDKUScale
            activates  the  scale  widget  and lets the user interact with the
            widget.  The parameter scale is a  pointer  to  a  non-NULL  scale
            widget.  If the actions parameter is passed with a non-NULL value,
            the characters in the array will be injected into the widget.   To
            activate  the  widget  interactively  pass  in  a NULL pointer for
            actions.  If the character entered into this widget is  RETURN  or
            TAB  then  this function will return a value from the low value to
            the high value.  It will also set  the  widget  data  exitType  to
            vNORMAL.   If  the  character  entered into this widget was ESCAPE
            then the widget will return the  unknownUnsigned  value  (see  the
            cdk_objs.h  header file).  The widget data exitType will be set to
            vESCAPE_HIT.

       destroyCDKUScale
            removes the widget from the screen and  frees  memory  the  object
            used.

       drawCDKUScale
            draws  the  scale  widget  on the screen.  If the box parameter is
            true, the widget is drawn with a box.

       eraseCDKUScale
            removes the widget from the screen.  This  does  NOT  destroy  the
            widget.

       getCDKUScaleBox
            returns whether the widget will be drawn with a box around it.

       getCDKUScaleHighValue
            returns the high value of the scale widget.

       getCDKUScaleLowValue
            returns the low value of the scale widget.

       getCDKUScaleValue
            returns the current value of the widget.

       injectCDKUScale
            injects  a  single character into the widget.  The parameter scale
            is a pointer to a non-NULL scale widget.  The parameter  character
            is  the character to inject into the widget.  The return value and
            side-effect (setting the widget data  exitType)  depend  upon  the
            injected character:

            RETURN or TAB
                   the  function  returns a value ranging from the scale’s low
                   value to the scale’s high value.  The widget data  exitType
                   is set to vNORMAL.

            ESCAPE the  function  returns  the  unknownUnsigned value (see the
                   cdk_objs.h header file).  The widget data exitType  is  set
                   to vESCAPE_HIT.

            Otherwise
                   unless  modified  by  preprocessing,  postprocessing or key
                   bindings, the function returns  the  unknownUnsigned  value
                   (see the cdk_objs.h header file).  The widget data exitType
                   is set to vEARLY_EXIT.

       moveCDKUScale
            moves the given widget to the given position.  The parameters xpos
            and  ypos  are the new position of the widget.  The parameter xpos
            may be an integer or one of the pre-defined  values  TOP,  BOTTOM,
            and  CENTER.   The  parameter ypos may be an integer or one of the
            pre-defined  values  LEFT,  RIGHT,  and  CENTER.   The   parameter
            relative  states  whether the xpos/ypos pair is a relative move or
            an absolute move.  For example, if xpos =  1  and  ypos  =  2  and
            relative  =  TRUE, then the widget would move one row down and two
            columns right.  If the value of relative was FALSE then the widget
            would  move  to  the  position  (1,2).  Do not use the values TOP,
            BOTTOM, LEFT, RIGHT, or  CENTER  when  relative  =  TRUE.   (weird
            things  may  happen).   The  final  parameter refresh is a boolean
            value which states whether the widget will get refreshed after the
            move.

       newCDKUScale
            creates a pointer to a scale widget.  Parameters:

            screen
                 is the screen you wish this widget to be placed in.

            xpos controls  the  placement  of  the object along the horizontal
                 axis.  It may be an integer or one of the pre-defined  values
                 LEFT, RIGHT, and CENTER.

            ypos controls the placement of the object along the vertical axis.
                 It may be an integer or one of the  pre-defined  values  TOP,
                 BOTTOM, and CENTER.

            title
                 is the string to display at the top of the widget.  The title
                 can be more than one line; just  provide  a  carriage  return
                 character at the line break.

            label
                 is the string to display in the label of the scale field.

            fieldAttribute
                 is the attribute of the characters displayed in the field.

            fieldWidth
                 controls  the width of the widget.  If you provide a value of
                 zero the widget will be created with the full  width  of  the
                 screen.   If you provide a negative value, the widget will be
                 created the full width minus the value provided.

            currentValue
                 is the value of the scale field when the widget is activated.

            lowValue and

            highValue
                 are the low and high values of the widget respectively.

            increment
                 is the regular increment value

            fastIncrement
                 is the accelerated increment value.

            box  is true if the widget should be drawn with a box around it.

            shadow
                 turns the shadow on or off around this widget.

            If  the  widget  could  not  be  created  then  a  NULL pointer is
            returned.

       positionCDKUScale
            allows the user to move the  widget  around  the  screen  via  the
            cursor/keypad keys.  See cdk_position (3) for key bindings.

       setCDKUScale
            lets  the  programmer modify certain elements of an existing scale
            widget.  The parameter names  correspond  to  the  same  parameter
            names listed in the newCDKUScale function.

       setCDKUScaleBackgroundAttrib
            sets  the  background  attribute  of  the  widget.   The parameter
            attribute is a curses attribute, e.g., A_BOLD.

       setCDKUScaleBackgroundColor
            sets the background color of the widget.  The parameter  color  is
            in the format of the Cdk format strings.  See cdk_display (3).

       setCDKUScaleBox
            sets whether the widget will be drawn with a box around it.

       setCDKUScaleBoxAttribute
            sets the attribute of the box.

       setCDKUScaleHorizontalChar
            sets  the  horizontal  drawing  character for the box to the given
            character.

       setCDKUScaleLLChar
            sets the lower left hand corner of the widget’s box to  the  given
            character.

       setCDKUScaleLRChar
            sets  the lower right hand corner of the widget’s box to the given
            character.

       setCDKUScaleLowHigh
            sets the low and high values of the widget.

       setCDKUScalePostProcess
            allows the user to have the widget call a function after  the  key
            has  been  applied  to  the widget.  The parameter function is the
            callback function.  The parameter data points to  data  passed  to
            the  callback  function.   To learn more about post-processing see
            cdk_process (3).

       setCDKUScalePreProcess
            allows the user to have the widget call a function after a key  is
            hit  and  before  the key is applied to the widget.  The parameter
            function is the callback function.  The parameter data  points  to
            data  passed  to  the callback function.  To learn more about pre-
            processing see cdk_process (3).

       setCDKUScaleULChar
            sets the upper left hand corner of the widget’s box to  the  given
            character.

       setCDKUScaleURChar
            sets  the upper right hand corner of the widget’s box to the given
            character.

       setCDKUScaleValue
            sets the current value of the widget.

       setCDKUScaleVerticalChar
            sets the vertical drawing character  for  the  box  to  the  given
            character.

KEY BINDINGS

       When  the  widget  is  activated there are several default key bindings
       which will help the user enter or manipulate the  information  quickly.
       The  following  table  outlines  the  keys  and  their actions for this
       widget.

          +----------------------------------------------------------------+
          |Key          Action                                             |
          +----------------------------------------------------------------+
          |Down Arrow   Decrements the scale by the normal value.          |
          |Up Arrow     Increments the scale by the normal value.          |
          |u            Increments the scale by the normal value.          |
          |Prev Page    Decrements the scale by the accelerated value.     |
          |U            Decrements the scale by the accelerated value.     |
          |Ctrl-B       Decrements the scale by the accelerated value.     |
          |Next Page    Increments the scale by the accelerated value.     |
          |Ctrl-F       Increments the scale by the accelerated value.     |
          |Home         Sets the scale to the low value.                   |
          |g            Sets the scale to the low value.                   |
          |^            Sets the scale to the low value.                   |
          |End          Sets the scale to the high value.                  |
          |G            Sets the scale to the high value.                  |
          |$            Sets the scale to the high value.                  |
          |Return       Exits the widget and  returns  the  index  of  the |
          |             selected  value.   This  also sets the widget data |
          |             exitType to vNORMAL.                               |
          |Tab          Exits the widget and  returns  the  index  of  the |
          |             selected  value.   This  also sets the widget data |
          |             exitType to vNORMAL.                               |
          |Escape       Exits the widget and returns  the  unknownUnsigned |
          |             value (see the cdk_objs.h header file).  This also |
          |             sets the widget data exitType to vESCAPE_HIT.      |
          |Ctrl-R       Refreshes the screen.                              |
          +----------------------------------------------------------------+
       If the cursor is not pointing to the field’s value, the  following  key
       bindings  apply.   You may use the left/right arrows to move the cursor
       onto the field’s value and modify it by typing  characters  to  replace
       the digits and sign.

           +-------------------------------------------------------------+
           |Key           Action                                         |
           +-------------------------------------------------------------+
           |Left Arrow    Decrements the scale by the normal value.      |
           |Right Arrow   Increments the scale by the normal value.      |
           +-------------------------------------------------------------+
           |d             Decrements the scale by the normal value.      |
           |D             Increments the scale by the accelerated value. |
           |-             Decrements the scale by the normal value.      |
           |+             Increments the scale by the normal value.      |
           |0             Sets the scale to the low value.               |
           +-------------------------------------------------------------+

SEE ALSO

       cdk(3), cdk_binding(3), cdk_display(3), cdk_position(3), cdk_screen(3)

                                                                 cdk_uscale(3)