Provided by: libcdk5-dev_5.0.20180306-3_amd64 bug

NAME

       cdk_dscale - curses scale widget (type double).

SYNOPSIS

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

       #include <cdk.h>

       double activateCDKDScale (
                      CDKDSCALE *scale,
                      chtype *actions);

       void destroyCDKDScale (
                      CDKDSCALE *scale);

       void drawCDKDScale (
                      CDKDSCALE *scale,
                      boolean box);

       void eraseCDKDScale (
                      CDKDSCALE *scale);

       boolean getCDKDScaleBox (
                      CDKDSCALE *scale);

       int getCDKDScaleDigits (
                      CDKDSCALE *scale);

       double getCDKDScaleHighValue (
                      CDKDSCALE *scale);

       double getCDKDScaleLowValue (
                      CDKDSCALE *scale);

       double getCDKDScaleValue (
                      CDKDSCALE *scale);

       int injectCDKDScale (
                      CDKDSCALE *scale,
                      chtype input);

       void moveCDKDScale (
                      CDKDSCALE *scale,
                      int xpos,
                      int ypos,
                      boolean relative,
                      boolean refresh);

       CDKDSCALE *newCDKDScale (
                      CDKSCREEN *cdkscreen,
                      int xpos,
                      int ypos,
                      const char *title,
                      const char *label,
                      chtype fieldAttribute,
                      int fieldWidth,
                      double currentValue,
                      double lowValue,
                      double highValue,
                      double increment,
                      double fastIncrement,
                      int digits,
                      boolean box,
                      boolean shadow);

       void positionCDKDScale (
                      CDKDSCALE *scale);

       void setCDKDScale (
                      CDKDSCALE *scale,
                      double lowValue,
                      double highValue,
                      double currentValue,
                      boolean box);

       void setCDKDScaleBackgroundAttrib (
                      CDKDSCALE *scale,
                      chtype attribute);

       void setCDKDScaleBackgroundColor (
                      CDKDSCALE *scale,
                      const char * color);

       void setCDKDScaleBox (
                      CDKDSCALE *scale,
                      boolean box);

       void setCDKDScaleBoxAttribute (
                      CDKDSCALE *scale,
                      chtype character);

       void setCDKDScaleDigits (
                      CDKDSCALE *scale,
                      int digits);

       void setCDKDScaleHorizontalChar (
                      CDKDSCALE *scale,
                      chtype character);

       void setCDKDScaleLLChar (
                      CDKDSCALE *scale,
                      chtype character);

       void setCDKDScaleLRChar (
                      CDKDSCALE *scale,
                      chtype character);

       void setCDKDScaleLowHigh (
                      CDKDSCALE *scale,
                      double low,
                      double high);

       void setCDKDScalePostProcess (
                      CDKDSCALE *scale,
                      PROCESSFN callback,
                      void * data);

       void setCDKDScalePreProcess (
                      CDKDSCALE *scale,
                      PROCESSFN callback,
                      void * data);

       void setCDKDScaleULChar (
                      CDKDSCALE *scale,
                      chtype character);

       void setCDKDScaleURChar (
                      CDKDSCALE *scale,
                      chtype character);

       void setCDKDScaleValue (
                      CDKDSCALE *scale,
                      double value);

       void setCDKDScaleVerticalChar (
                      CDKDSCALE *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

       activateCDKDScale
            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 unknownDouble value (see the cdk_objs.h header file).

            The widget data exitType will be set to vESCAPE_HIT.

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

       drawCDKDScale
            draws the scale widget on the screen.

            If the box parameter is true, the widget is drawn with a box.

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

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

       getCDKDScaleDigits
            returns the number of digits shown after the decimal point for the box value.

       getCDKDScaleHighValue
            returns the high value of the scale widget.

       getCDKDScaleLowValue
            returns the low value of the scale widget.

       getCDKDScaleValue
            returns the current value of the widget.

       injectCDKDScale
            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 unknownDouble 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 unknownDouble value (see the cdk_objs.h header file).  The  widget
                   data exitType is set to vEARLY_EXIT.

       moveCDKDScale
            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.

       newCDKDScale
            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.

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

       setCDKDScale
            lets the programmer modify certain elements of an existing scale widget.

            The parameter names correspond to the same parameter names listed in the newCDKDScale
            function.

       setCDKDScaleBackgroundAttrib
            sets the background attribute of the widget.

            The parameter attribute is a curses attribute, e.g., A_BOLD.

       setCDKDScaleBackgroundColor
            sets the background color of the widget.

            The parameter color is in the format of the Cdk format strings.

            See cdk_display (3).

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

       setCDKDScaleBoxAttribute
            sets the attribute of the box.

       setCDKDScaleDigits
            sets the number of digits shown after the decimal point for the box value.

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

       setCDKDScaleLLChar
            sets the lower left hand corner of the widget's box to the given character.

       setCDKDScaleLRChar
            sets the lower right hand corner of the widget's box to the given character.

       setCDKDScaleLowHigh
            sets the low and high values of the widget.

       setCDKDScalePostProcess
            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).

       setCDKDScalePreProcess
            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).

       setCDKDScaleULChar
            sets the upper left hand corner of the widget's box to the given character.

       setCDKDScaleURChar
            sets the upper right hand corner of the widget's box to the given character.

       setCDKDScaleValue
            sets the current value of the widget.

       setCDKDScaleVerticalChar
            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 unknownDouble │
                 │                  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_dscale(3)