FLcount

FLcount — A FLTK widget opcode that creates a counter.

Description

Allows the user to increase/decrease a value with mouse clicks on a corresponding arrow button.

Syntax

kout, ihandle FLcount "label", imin, imax, istep1, istep2, itype, \
      iwidth, iheight, ix, iy, iopcode [, kp1] [, kp2] [, kp3] [...] [, kpN]

Initialization

ihandle -- a handle value (an integer number) that unequivocally references a corresponding widget. Used by further opcodes that changes some valuator's properties. It is automatically set by the corresponding valuator.

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

imin -- minimum value of output range

imax -- maximum value of output range

istep1 -- a floating-point number indicating the increment of valuator value corresponding to of each mouse click. istep1 is for fine adjustments.

istep2 -- a floating-point number indicating the increment of valuator value corresponding to of each mouse click. istep2 is for coarse adjustments.

itype -- an integer number denoting the appearance of the valuator.

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).

iopcode -- score opcode type. You have to provide the ascii code of the letter corresponding to the score opcode. At present time only i (ascii code 105) score statements are supported. A zero value refers to a default value of i. So both 0 and 105 activates the i opcode. A value of -1 disables this opcode feature.

Performance

kout -- output value

kp1, kp2, ..., kpN -- arguments of the activated instruments.

FLcount allows the user to increase/decrease a value with mouse clicks on corresponding arrow buttons:

FLcount.

FLcount.

There are two kind of arrow buttons, for larger and smaller steps. Notice that FLcount not only outputs a value and a handle, but can also activate (schedule) an instrument provided by the user each time a button is pressed. P-fields of the activated instrument are kp1 (instrument number), kp2 (action time), kp3 (duration) and so on with user p-fields. If the iopcode argument is set to a negative number, no instrument is activated. So this feature is optional.

Examples

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

Example 253. Example of the FLcount 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 FLcount.wav -W ;;; for file output any platform
</CsOptions>
<CsInstruments>

; Demonstration of the flcount opcode
; clicking on the single arrow buttons
; increments the oscillator in semitone steps
; clicking on the double arrow buttons 
; increments the oscillator in octave steps
sr = 44100
kr = 441
ksmps = 100
nchnls = 1

FLpanel "Counter", 900, 400, 50, 50
    ; Minimum value output by counter
    imin = 6
    ; Maximum value output by counter
    imax = 12
    ; Single arrow step size (semitones)
    istep1 = 1/12
    ; Double arrow step size (octave)
    istep2 = 1 
    ; Counter type (1=double arrow counter)
    itype = 1
    ; Width of the counter in pixels
    iwidth = 200
    ; Height of the counter in pixels
    iheight = 30
    ; Distance of the left edge of the counter
    ; from the left edge of the panel
    ix = 50
    ; Distance of the top edge of the counter
    ; from the top edge of the panel
    iy = 50
    ; Score event type (-1=ignored)
    iopcode = -1

    gkoct, ihandle FLcount "pitch in oct format", imin, imax, istep1, istep2, itype, iwidth, iheight, ix, iy, iopcode, 1, 0, 1
; End of panel contents
FLpanelEnd
; Run the widget thread!
FLrun

instr 1
    iamp = 15000
    ifn = 1
    asig oscili iamp, cpsoct(gkoct), 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

FLjoy, FLknob, FLroller, FLslider, FLtext

Credits

Author: Gabriel Maldonado

New in version 4.22

Example written by Iain McCurdy, edited by Kevin Conder.