89 lines
1.5 KiB
Text
89 lines
1.5 KiB
Text
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#lang scribble/manual
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@(require (for-label racket))
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@title{SimpleController}
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Controller according to the model-view-controller (M-V-C) paradigm@section{categories}
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Core
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@section{related}
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Classes/Object
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@section{description}
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SimpleController can be used as a controller according to the model-view-controller (M-V-C) paradigm. It provides an
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link::Classes/IdentityDictionary:: of actions, which are called whenever the attached model sends a notification by
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calling changed.
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@section{CLASSMETHODS}
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@section{METHOD}
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new
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Creates a SimpleController instance with the model to be observed.
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@section{argument}
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model
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An object of any class
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@section{INSTANCEMETHODS}
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@section{private}
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init, update
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@section{METHOD}
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put
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@section{argument}
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what
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Register an action, which is called when the model invokes changed(what, moreArgs).
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@section{argument}
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action
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Action to register.
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@section{METHOD}
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remove
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Remove a registered action.
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@section{argument}
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action
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Action to remove
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@section{EXAMPLES}
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@racketblock[
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(
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var controller, model, view;
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model = Ref(0.5);
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controller = SimpleController(model);
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controller.put(\value,
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{|theChanger, what, moreArgs|
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view.value_(theChanger.value);
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});
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view = Slider(Window("slider", Rect(100, 100, 330, 38)).front, Rect(5, 5, 320, 20));
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view.onClose_{controller.remove};
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// run a routine to change the model's value:
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r{
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100.do{
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model.value_(1.0.rand.postln).changed(\value);
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0.5.wait;
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}
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}.play(AppClock)
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)
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::
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]
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