checkbox

checkbox — Sense on-screen controls.

Description

Sense on-screen controls. Requires Winsound or TCL/TK.

Syntax

kres checkbox knum

Performance

kres -- value of the checkbox control. If the checkbox is set (pushed) then return 1, if not, return 0.

knum -- the number of the checkbox. If it does not exist, it is made on-screen at initialization.

Examples

Here is a simple example of the checkbox opcode. It uses the file checkbox.csd.

Example 64. Simple example of the checkbox 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 checkbox.wav -W ;;; for file output any platform
</CsOptions>
<CsInstruments>

; Initialize the global variables.
sr = 44100
kr = 44100
ksmps = 1
nchnls = 1
 
instr 1
  ; Get the value from the checkbox.
  k1 checkbox 1

  ; If the checkbox is selected then k2=440, otherwise k2=880.
  k2 = (k1 == 0 ? 440 : 880)

  a1 oscil 10000, k2, 1
  out a1
endin


</CsInstruments>
<CsScore>

; Just generate a nice, ordinary sine wave.
f 1 0 32768 10 1

; Play Instrument #1 for ten seconds.
i 1 0 10 
e


</CsScore>
</CsoundSynthesizer>

          

See Also

button

Credits

Author: John ffitch
University of Bath, Codemist. Ltd.
Bath, UK
September, 2000

Example written by Kevin Conder.

New in Csound version 4.08