FLvalue
FLvalue — Shows the current value of a FLTK valuator.
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]](images/note.png)
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Note |
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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 295. 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>