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cdk_uscale 3


cdk_uscale(3)                                                  cdk_uscale(3)




NAME

       cdk_uscale - curses scale widget (type unsigned).


SYNOPSIS

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

       #include <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,
                      const char *title,
                      const 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,
                      const 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  charac-
            ter  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  exit-
                   Type 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 exit-
                   Type 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  parame-
            ter  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  val-
                 ues 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  val-
                 ues 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  acti-
                 vated.

            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 parame-
            ter 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 wid-
       get.

       +---------------------------------------------------------------------+
       |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)

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