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    <p>You could try subscribing to <code>instanceReady</code> event this way: </p> <pre><code>CKEDITOR.instances.editor.on("instanceReady", onInstanceReadyHandler) </code></pre> <p>However, the <code>editor</code> instance must have been already created by then (inspect <code>CKEDITOR.instances</code> in the debugger). </p> <p>I'm a bit confused about the difference between <code>editable</code> and <code>editor</code>. Could you show the fragments of your code where <code>this.editor</code> and <code>this.editable</code> get assigned? </p> <p><strong>[EDITED]</strong> I guess I see what's going on. <code>CKEDITOR</code> is a global object, you may think of it as of a class which holds all CKEDITOR instances. Trying to handle events with <code>CKEDITOR.on</code> isn't right, you need to do it on a specific instance (like I've shown above). I assume, <em>"editor"</em> is the ID of your parent element you want to attach a <code>CKEDITOR</code> instance to (please correct me if I'm wrong). I'm not familiar with Backbone, but usually it's done with <a href="http://docs.ckeditor.com/#!/api/CKEDITOR-method-replace" rel="noreferrer">replace</a>:</p> <pre><code>var editorInstance = CKEDITOR.replace("editor", { on: { instanceReady: function(ev) { alert("editor is ready!"); }}}); </code></pre> <p>Here we attach a new instance of CKEDITOR to the <code>editor</code> parent element and subscribe to the <code>instanceReady</code> event at the same time. The returned object <code>editorInstance</code> should provide all the <a href="http://docs.ckeditor.com/#!/api/CKEDITOR.editor" rel="noreferrer">APIs</a> you may need, including <a href="http://docs.ckeditor.com/#!/api/CKEDITOR.editor-method-setReadOnly" rel="noreferrer">setReadOnly</a>. You could also access it through the global <code>CKEDITOR</code> object using the parent element ID, i.e. <code>CKEDITOR.instances.editor</code>. On the other hand, <a href="http://docs.ckeditor.com/#!/api/CKEDITOR.editable" rel="noreferrer">editable</a> is rather a service object available on <a href="http://docs.ckeditor.com/#!/api/CKEDITOR.editor" rel="noreferrer">editor</a>. I can't think of any specific case where you might need to use it directly.</p>
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    1. POsetReadOnly causes error when called on instanceReady of CKEditor
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    1. CO`CKEDITOR` does hold all instances, but it also does a lot more. The reason I don't add the `instanceReady` listener to the instance is because the function `setEnabledOnLoad` is called before the instance has been created. This is a result of having the code in two places. GWT has said "ok, create the instance" but Backbone hasn't finished by the time GWT goes to the next line of code and wants to set it enabled/disabled.
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    2. COI admit I lack the proper knowledge on Backbone and GWT to take my answer any further :] Hopefully, someone can jump in.
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