FLvalue
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## FLvalue

FLvalue — Shows the current value of a FLTK valuator.

## Description

FLvalue shows current the value of a valuator in a text field.

## Syntax

    ihandle FLvalue "label", iwidth, iheight, ix, iy

## Initialization

ihandle -- handle value (an integer number) that unequivocally references the corresponding valuator. It can be used for the idisp argument of a valuator.

“label” -- a double-quoted string containing some user-provided text, placed near the corresponding widget.

iwidth -- width of widget.

iheight -- height of widget.

ix -- horizontal position of upper left corner of the valuator, relative to the upper left corner of corresponding window (expressed in pixels).

iy -- vertical position of upper left corner of the valuator, relative to the upper left corner of corresponding window (expressed in pixels).

## Performance

FLvalue shows the current values of a valuator in a text field. It outputs ihandle that can then be used for the idisp argument of a valuator (see the FLTK Valuators section). In this way, the values of that valuator will be dynamically be shown in a text field.

| Note
Note that FLvalue is not a valuator and its value cannot be modified.The value for an FLvalue widget should be set only by other widgets, and NOT from FLsetVal or FLsetVal_i since this can cause Csound to crash.

## Examples

Here is an example of the FLvalue opcode. It uses the file FLvalue.csd.

Example 309. Example of the FLvalue opcode.

See the sections Real-time Audio and Command Line Flags for more information on using command line flags.

    <CsoundSynthesizer>
    <CsOptions>
    ; Select audio/midi flags here according to platform
    ; Audio out   Audio in    No messages
    -odac           -iadc     -d     ;;;RT audio I/O
    ; For Non-realtime ouput leave only the line below:
    ; -o FLvalue.wav -W ;;; for file output any platform
    </CsOptions>
    <CsInstruments>

    ; Using the opcode flvalue to display the output of a slider
    sr = 44100
    kr = 441
    ksmps = 100
    nchnls = 1

    FLpanel "Value Display Box", 900, 200, 50, 50
        ; Width of the value display box in pixels
        iwidth = 50
        ; Height of the value display box in pixels
        iheight = 20
        ; Distance of the left edge of the value display
        ; box from the left edge of the panel
        ix = 65
        ; Distance of the top edge of the value display
        ; box from the top edge of the panel
        iy = 55

        idisp FLvalue "Hertz", iwidth, iheight, ix, iy
        gkfreq, ihandle FLslider "Frequency", 200, 5000, -1, 5, idisp, 750, 30, 125, 50
        FLsetVal_i 500, ihandle
    ; End of panel contents
    FLpanelEnd
    ; Run the widget thread!
    FLrun

    instr 1
        iamp = 15000
        ifn = 1
        asig oscili iamp, gkfreq, ifn
        out asig
    endin

    </CsInstruments>
    <CsScore>

    ; Function table that defines a single cycle
    ; of a sine wave.
    f 1 0 1024 10 1

    ; Instrument 1 will play a note for 1 hour.
    i 1 0 3600
    e

    </CsScore>
    </CsoundSynthesizer>

## See Also

FLbox, FLbutBank, FLbutton, FLprintk, FLprintk2

## Credits

Author: Gabriel Maldonado

New in version 4.22

Example written by Iain McCurdy, edited by Kevin Conder.

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