76 lines
1.4 KiB
Text
76 lines
1.4 KiB
Text
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#lang scribble/manual
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@(require (for-label racket))
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@title{KeyState}
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Respond to the state of a key@section{related}
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Classes/MouseButton, Classes/MouseX, Classes/MouseY
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@section{categories}
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UGens>User interaction
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@section{description}
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Respond to the state of a key.
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@section{note}
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Note that this UGen does not prevent normal typing. It therefore may be
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helpful to select a GUI window rather than an SC document when using
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KeyState, as the latter will be altered by any keystrokes.
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::
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@section{classmethods}
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@section{method}
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kr
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@section{argument}
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keycode
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The keycode value of the key to check. This corresponds to the
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keycode values passed into the keyDownActions of SCViews. See the
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example below.
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@section{argument}
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minval
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The value to output when the key is not pressed.
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@section{argument}
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maxval
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The value to output when the key is pressed.
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@section{argument}
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lag
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A lag factor.
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@section{instancemethods}
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@section{private}
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signalRange
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@section{Examples}
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@racketblock[
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s.boot;
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// execute the code below to find out a key's keycode
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// the char and keycode of any key you press will be printed in the post window
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(
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w = Window.new("I catch keystrokes");
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w.view.keyDownAction = { arg view, char, modifiers, unicode, keycode; [char, keycode].postln; };
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w.front;
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)
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// then execute this and then press the 'j' key
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(
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w.front; // something safe to type on
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{ SinOsc.ar(800, 0, KeyState.kr(38, 0, 0.1)) }.play;
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)
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::
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]
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