Patch to allow generic Ajax.Autocompleter-style textbox watchers.
Forwarded for "[Rails-spinoffs] Delayed input posting" -Rob
--- Begin Message ---Hey. Below is a patch to allow generic Ajax.Autocompleters. Basically it's for people who wanna be able to watch an input for changes, but don't want it to pop up an autocompleter box below. Useful for live previews, that kind of thing. Someone's gonna have to fix the tabstops. I couldn't be arse to work out how to make vim do the softtabs properly. Spaces for indentation is stupid anyway. -Rob --- js/controls.js.old 2006-02-13 16:48:19.000000000 +0000 +++ js/controls.js 2006-02-13 14:48:28.000000000 +0000 @@ -336,6 +336,45 @@ }); +Ajax.Watcher = Class.create(); +Ajax.Watcher.prototype = { + initialize: function(element, url, callback, options) { + this.options = Object.extend({ + waitTime: 3, + frequency: 0.4 + }, options); + this.element = $(element); + this.url = url; + this.callback = callback; + this.observer = null; + this.active = false; + this.changed = false; + Event.observe(this.element, "keypress", this.onKeyPress.bindAsEventListener(this)); + if (this.options.firstRun) { + this.onObserverEvent(); + } + }, + onKeyPress: function(event) { + this.changed = true; + this.hasFocus = true; + + if(this.observer) clearTimeout(this.observer); + this.observer = + setTimeout(this.onObserverEvent.bind(this), this.options.frequency*1000); + }, + onObserverEvent: function() { + this.changed = false; + data = escape(this.element.value); + new Ajax.Request(this.url, Object.extend(this.options, { + onSuccess:this.callback, + method:"post", + postBody:"value="+data})); + }, + +}; + + + // The local array autocompleter. Used when you'd prefer to // inject an array of autocompletion options into the page, rather // than sending out Ajax queries, which can be quite slow sometimes.
--- End Message ---
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