diff options
Diffstat (limited to 'library/cropper/lib/controls.js')
| -rw-r--r-- | library/cropper/lib/controls.js | 815 |
1 files changed, 0 insertions, 815 deletions
diff --git a/library/cropper/lib/controls.js b/library/cropper/lib/controls.js deleted file mode 100644 index de0261ed5..000000000 --- a/library/cropper/lib/controls.js +++ /dev/null @@ -1,815 +0,0 @@ -// Copyright (c) 2005 Thomas Fuchs (http://script.aculo.us, http://mir.aculo.us) -// (c) 2005 Ivan Krstic (http://blogs.law.harvard.edu/ivan) -// (c) 2005 Jon Tirsen (http://www.tirsen.com) -// Contributors: -// Richard Livsey -// Rahul Bhargava -// Rob Wills -// -// See scriptaculous.js for full license. - -// Autocompleter.Base handles all the autocompletion functionality -// that's independent of the data source for autocompletion. This -// includes drawing the autocompletion menu, observing keyboard -// and mouse events, and similar. -// -// Specific autocompleters need to provide, at the very least, -// a getUpdatedChoices function that will be invoked every time -// the text inside the monitored textbox changes. This method -// should get the text for which to provide autocompletion by -// invoking this.getToken(), NOT by directly accessing -// this.element.value. This is to allow incremental tokenized -// autocompletion. Specific auto-completion logic (AJAX, etc) -// belongs in getUpdatedChoices. -// -// Tokenized incremental autocompletion is enabled automatically -// when an autocompleter is instantiated with the 'tokens' option -// in the options parameter, e.g.: -// new Ajax.Autocompleter('id','upd', '/url/', { tokens: ',' }); -// will incrementally autocomplete with a comma as the token. -// Additionally, ',' in the above example can be replaced with -// a token array, e.g. { tokens: [',', '\n'] } which -// enables autocompletion on multiple tokens. This is most -// useful when one of the tokens is \n (a newline), as it -// allows smart autocompletion after linebreaks. - -var Autocompleter = {} -Autocompleter.Base = function() {}; -Autocompleter.Base.prototype = { - baseInitialize: function(element, update, options) { - this.element = $(element); - this.update = $(update); - this.hasFocus = false; - this.changed = false; - this.active = false; - this.index = 0; - this.entryCount = 0; - - if (this.setOptions) - this.setOptions(options); - else - this.options = options || {}; - - this.options.paramName = this.options.paramName || this.element.name; - this.options.tokens = this.options.tokens || []; - this.options.frequency = this.options.frequency || 0.4; - this.options.minChars = this.options.minChars || 1; - this.options.onShow = this.options.onShow || - function(element, update){ - if(!update.style.position || update.style.position=='absolute') { - update.style.position = 'absolute'; - Position.clone(element, update, {setHeight: false, offsetTop: element.offsetHeight}); - } - Effect.Appear(update,{duration:0.15}); - }; - this.options.onHide = this.options.onHide || - function(element, update){ new Effect.Fade(update,{duration:0.15}) }; - - if (typeof(this.options.tokens) == 'string') - this.options.tokens = new Array(this.options.tokens); - - this.observer = null; - - this.element.setAttribute('autocomplete','off'); - - Element.hide(this.update); - - Event.observe(this.element, "blur", this.onBlur.bindAsEventListener(this)); - Event.observe(this.element, "keypress", this.onKeyPress.bindAsEventListener(this)); - }, - - show: function() { - if(Element.getStyle(this.update, 'display')=='none') this.options.onShow(this.element, this.update); - if(!this.iefix && - (navigator.appVersion.indexOf('MSIE')>0) && - (navigator.userAgent.indexOf('Opera')<0) && - (Element.getStyle(this.update, 'position')=='absolute')) { - new Insertion.After(this.update, - '<iframe id="' + this.update.id + '_iefix" '+ - 'style="display:none;position:absolute;filter:progid:DXImageTransform.Microsoft.Alpha(opacity=0);" ' + - 'src="javascript:false;" frameborder="0" scrolling="no"></iframe>'); - this.iefix = $(this.update.id+'_iefix'); - } - if(this.iefix) setTimeout(this.fixIEOverlapping.bind(this), 50); - }, - - fixIEOverlapping: function() { - Position.clone(this.update, this.iefix); - this.iefix.style.zIndex = 1; - this.update.style.zIndex = 2; - Element.show(this.iefix); - }, - - hide: function() { - this.stopIndicator(); - if(Element.getStyle(this.update, 'display')!='none') this.options.onHide(this.element, this.update); - if(this.iefix) Element.hide(this.iefix); - }, - - startIndicator: function() { - if(this.options.indicator) Element.show(this.options.indicator); - }, - - stopIndicator: function() { - if(this.options.indicator) Element.hide(this.options.indicator); - }, - - onKeyPress: function(event) { - if(this.active) - switch(event.keyCode) { - case Event.KEY_TAB: - case Event.KEY_RETURN: - this.selectEntry(); - Event.stop(event); - case Event.KEY_ESC: - this.hide(); - this.active = false; - Event.stop(event); - return; - case Event.KEY_LEFT: - case Event.KEY_RIGHT: - return; - case Event.KEY_UP: - this.markPrevious(); - this.render(); - if(navigator.appVersion.indexOf('AppleWebKit')>0) Event.stop(event); - return; - case Event.KEY_DOWN: - this.markNext(); - this.render(); - if(navigator.appVersion.indexOf('AppleWebKit')>0) Event.stop(event); - return; - } - else - if(event.keyCode==Event.KEY_TAB || event.keyCode==Event.KEY_RETURN || - (navigator.appVersion.indexOf('AppleWebKit') > 0 && event.keyCode == 0)) return; - - this.changed = true; - this.hasFocus = true; - - if(this.observer) clearTimeout(this.observer); - this.observer = - setTimeout(this.onObserverEvent.bind(this), this.options.frequency*1000); - }, - - activate: function() { - this.changed = false; - this.hasFocus = true; - this.getUpdatedChoices(); - }, - - onHover: function(event) { - var element = Event.findElement(event, 'LI'); - if(this.index != element.autocompleteIndex) - { - this.index = element.autocompleteIndex; - this.render(); - } - Event.stop(event); - }, - - onClick: function(event) { - var element = Event.findElement(event, 'LI'); - this.index = element.autocompleteIndex; - this.selectEntry(); - this.hide(); - }, - - onBlur: function(event) { - // needed to make click events working - setTimeout(this.hide.bind(this), 250); - this.hasFocus = false; - this.active = false; - }, - - render: function() { - if(this.entryCount > 0) { - for (var i = 0; i < this.entryCount; i++) - this.index==i ? - Element.addClassName(this.getEntry(i),"selected") : - Element.removeClassName(this.getEntry(i),"selected"); - - if(this.hasFocus) { - this.show(); - this.active = true; - } - } else { - this.active = false; - this.hide(); - } - }, - - markPrevious: function() { - if(this.index > 0) this.index-- - else this.index = this.entryCount-1; - }, - - markNext: function() { - if(this.index < this.entryCount-1) this.index++ - else this.index = 0; - }, - - getEntry: function(index) { - return this.update.firstChild.childNodes[index]; - }, - - getCurrentEntry: function() { - return this.getEntry(this.index); - }, - - selectEntry: function() { - this.active = false; - this.updateElement(this.getCurrentEntry()); - }, - - updateElement: function(selectedElement) { - if (this.options.updateElement) { - this.options.updateElement(selectedElement); - return; - } - var value = ''; - if (this.options.select) { - var nodes = document.getElementsByClassName(this.options.select, selectedElement) || []; - if(nodes.length>0) value = Element.collectTextNodes(nodes[0], this.options.select); - } else - value = Element.collectTextNodesIgnoreClass(selectedElement, 'informal'); - - var lastTokenPos = this.findLastToken(); - if (lastTokenPos != -1) { - var newValue = this.element.value.substr(0, lastTokenPos + 1); - var whitespace = this.element.value.substr(lastTokenPos + 1).match(/^\s+/); - if (whitespace) - newValue += whitespace[0]; - this.element.value = newValue + value; - } else { - this.element.value = value; - } - this.element.focus(); - - if (this.options.afterUpdateElement) - this.options.afterUpdateElement(this.element, selectedElement); - }, - - updateChoices: function(choices) { - if(!this.changed && this.hasFocus) { - this.update.innerHTML = choices; - Element.cleanWhitespace(this.update); - Element.cleanWhitespace(this.update.firstChild); - - if(this.update.firstChild && this.update.firstChild.childNodes) { - this.entryCount = - this.update.firstChild.childNodes.length; - for (var i = 0; i < this.entryCount; i++) { - var entry = this.getEntry(i); - entry.autocompleteIndex = i; - this.addObservers(entry); - } - } else { - this.entryCount = 0; - } - - this.stopIndicator(); - - this.index = 0; - this.render(); - } - }, - - addObservers: function(element) { - Event.observe(element, "mouseover", this.onHover.bindAsEventListener(this)); - Event.observe(element, "click", this.onClick.bindAsEventListener(this)); - }, - - onObserverEvent: function() { - this.changed = false; - if(this.getToken().length>=this.options.minChars) { - this.startIndicator(); - this.getUpdatedChoices(); - } else { - this.active = false; - this.hide(); - } - }, - - getToken: function() { - var tokenPos = this.findLastToken(); - if (tokenPos != -1) - var ret = this.element.value.substr(tokenPos + 1).replace(/^\s+/,'').replace(/\s+$/,''); - else - var ret = this.element.value; - - return /\n/.test(ret) ? '' : ret; - }, - - findLastToken: function() { - var lastTokenPos = -1; - - for (var i=0; i<this.options.tokens.length; i++) { - var thisTokenPos = this.element.value.lastIndexOf(this.options.tokens[i]); - if (thisTokenPos > lastTokenPos) - lastTokenPos = thisTokenPos; - } - return lastTokenPos; - } -} - -Ajax.Autocompleter = Class.create(); -Object.extend(Object.extend(Ajax.Autocompleter.prototype, Autocompleter.Base.prototype), { - initialize: function(element, update, url, options) { - this.baseInitialize(element, update, options); - this.options.asynchronous = true; - this.options.onComplete = this.onComplete.bind(this); - this.options.defaultParams = this.options.parameters || null; - this.url = url; - }, - - getUpdatedChoices: function() { - entry = encodeURIComponent(this.options.paramName) + '=' + - encodeURIComponent(this.getToken()); - - this.options.parameters = this.options.callback ? - this.options.callback(this.element, entry) : entry; - - if(this.options.defaultParams) - this.options.parameters += '&' + this.options.defaultParams; - - new Ajax.Request(this.url, this.options); - }, - - onComplete: function(request) { - this.updateChoices(request.responseText); - } - -}); - -// 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. -// -// The constructor takes four parameters. The first two are, as usual, -// the id of the monitored textbox, and id of the autocompletion menu. -// The third is the array you want to autocomplete from, and the fourth -// is the options block. -// -// Extra local autocompletion options: -// - choices - How many autocompletion choices to offer -// -// - partialSearch - If false, the autocompleter will match entered -// text only at the beginning of strings in the -// autocomplete array. Defaults to true, which will -// match text at the beginning of any *word* in the -// strings in the autocomplete array. If you want to -// search anywhere in the string, additionally set -// the option fullSearch to true (default: off). -// -// - fullSsearch - Search anywhere in autocomplete array strings. -// -// - partialChars - How many characters to enter before triggering -// a partial match (unlike minChars, which defines -// how many characters are required to do any match -// at all). Defaults to 2. -// -// - ignoreCase - Whether to ignore case when autocompleting. -// Defaults to true. -// -// It's possible to pass in a custom function as the 'selector' -// option, if you prefer to write your own autocompletion logic. -// In that case, the other options above will not apply unless -// you support them. - -Autocompleter.Local = Class.create(); -Autocompleter.Local.prototype = Object.extend(new Autocompleter.Base(), { - initialize: function(element, update, array, options) { - this.baseInitialize(element, update, options); - this.options.array = array; - }, - - getUpdatedChoices: function() { - this.updateChoices(this.options.selector(this)); - }, - - setOptions: function(options) { - this.options = Object.extend({ - choices: 10, - partialSearch: true, - partialChars: 2, - ignoreCase: true, - fullSearch: false, - selector: function(instance) { - var ret = []; // Beginning matches - var partial = []; // Inside matches - var entry = instance.getToken(); - var count = 0; - - for (var i = 0; i < instance.options.array.length && - ret.length < instance.options.choices ; i++) { - - var elem = instance.options.array[i]; - var foundPos = instance.options.ignoreCase ? - elem.toLowerCase().indexOf(entry.toLowerCase()) : - elem.indexOf(entry); - - while (foundPos != -1) { - if (foundPos == 0 && elem.length != entry.length) { - ret.push("<li><strong>" + elem.substr(0, entry.length) + "</strong>" + - elem.substr(entry.length) + "</li>"); - break; - } else if (entry.length >= instance.options.partialChars && - instance.options.partialSearch && foundPos != -1) { - if (instance.options.fullSearch || /\s/.test(elem.substr(foundPos-1,1))) { - partial.push("<li>" + elem.substr(0, foundPos) + "<strong>" + - elem.substr(foundPos, entry.length) + "</strong>" + elem.substr( - foundPos + entry.length) + "</li>"); - break; - } - } - - foundPos = instance.options.ignoreCase ? - elem.toLowerCase().indexOf(entry.toLowerCase(), foundPos + 1) : - elem.indexOf(entry, foundPos + 1); - - } - } - if (partial.length) - ret = ret.concat(partial.slice(0, instance.options.choices - ret.length)) - return "<ul>" + ret.join('') + "</ul>"; - } - }, options || {}); - } -}); - -// AJAX in-place editor -// -// see documentation on http://wiki.script.aculo.us/scriptaculous/show/Ajax.InPlaceEditor - -// Use this if you notice weird scrolling problems on some browsers, -// the DOM might be a bit confused when this gets called so do this -// waits 1 ms (with setTimeout) until it does the activation -Field.scrollFreeActivate = function(field) { - setTimeout(function() { - Field.activate(field); - }, 1); -} - -Ajax.InPlaceEditor = Class.create(); -Ajax.InPlaceEditor.defaultHighlightColor = "#FFFF99"; -Ajax.InPlaceEditor.prototype = { - initialize: function(element, url, options) { - this.url = url; - this.element = $(element); - - this.options = Object.extend({ - okButton: true, - okText: "ok", - cancelLink: true, - cancelText: "cancel", - savingText: "Saving...", - clickToEditText: "Click to edit", - okText: "ok", - rows: 1, - onComplete: function(transport, element) { - new Effect.Highlight(element, {startcolor: this.options.highlightcolor}); - }, - onFailure: function(transport) { - alert("Error communicating with the server: " + transport.responseText.stripTags()); - }, - callback: function(form) { - return Form.serialize(form); - }, - handleLineBreaks: true, - loadingText: 'Loading...', - savingClassName: 'inplaceeditor-saving', - loadingClassName: 'inplaceeditor-loading', - formClassName: 'inplaceeditor-form', - highlightcolor: Ajax.InPlaceEditor.defaultHighlightColor, - highlightendcolor: "#FFFFFF", - externalControl: null, - submitOnBlur: false, - ajaxOptions: {}, - evalScripts: false - }, options || {}); - - if(!this.options.formId && this.element.id) { - this.options.formId = this.element.id + "-inplaceeditor"; - if ($(this.options.formId)) { - // there's already a form with that name, don't specify an id - this.options.formId = null; - } - } - - if (this.options.externalControl) { - this.options.externalControl = $(this.options.externalControl); - } - - this.originalBackground = Element.getStyle(this.element, 'background-color'); - if (!this.originalBackground) { - this.originalBackground = "transparent"; - } - - this.element.title = this.options.clickToEditText; - - this.onclickListener = this.enterEditMode.bindAsEventListener(this); - this.mouseoverListener = this.enterHover.bindAsEventListener(this); - this.mouseoutListener = this.leaveHover.bindAsEventListener(this); - Event.observe(this.element, 'click', this.onclickListener); - Event.observe(this.element, 'mouseover', this.mouseoverListener); - Event.observe(this.element, 'mouseout', this.mouseoutListener); - if (this.options.externalControl) { - Event.observe(this.options.externalControl, 'click', this.onclickListener); - Event.observe(this.options.externalControl, 'mouseover', this.mouseoverListener); - Event.observe(this.options.externalControl, 'mouseout', this.mouseoutListener); - } - }, - enterEditMode: function(evt) { - if (this.saving) return; - if (this.editing) return; - this.editing = true; - this.onEnterEditMode(); - if (this.options.externalControl) { - Element.hide(this.options.externalControl); - } - Element.hide(this.element); - this.createForm(); - this.element.parentNode.insertBefore(this.form, this.element); - Field.scrollFreeActivate(this.editField); - // stop the event to avoid a page refresh in Safari - if (evt) { - Event.stop(evt); - } - return false; - }, - createForm: function() { - this.form = document.createElement("form"); - this.form.id = this.options.formId; - Element.addClassName(this.form, this.options.formClassName) - this.form.onsubmit = this.onSubmit.bind(this); - - this.createEditField(); - - if (this.options.textarea) { - var br = document.createElement("br"); - this.form.appendChild(br); - } - - if (this.options.okButton) { - okButton = document.createElement("input"); - okButton.type = "submit"; - okButton.value = this.options.okText; - okButton.className = 'editor_ok_button'; - this.form.appendChild(okButton); - } - - if (this.options.cancelLink) { - cancelLink = document.createElement("a"); - cancelLink.href = "#"; - cancelLink.appendChild(document.createTextNode(this.options.cancelText)); - cancelLink.onclick = this.onclickCancel.bind(this); - cancelLink.className = 'editor_cancel'; - this.form.appendChild(cancelLink); - } - }, - hasHTMLLineBreaks: function(string) { - if (!this.options.handleLineBreaks) return false; - return string.match(/<br/i) || string.match(/<p>/i); - }, - convertHTMLLineBreaks: function(string) { - return string.replace(/<br>/gi, "\n").replace(/<br\/>/gi, "\n").replace(/<\/p>/gi, "\n").replace(/<p>/gi, ""); - }, - createEditField: function() { - var text; - if(this.options.loadTextURL) { - text = this.options.loadingText; - } else { - text = this.getText(); - } - - var obj = this; - - if (this.options.rows == 1 && !this.hasHTMLLineBreaks(text)) { - this.options.textarea = false; - var textField = document.createElement("input"); - textField.obj = this; - textField.type = "text"; - textField.name = "value"; - textField.value = text; - textField.style.backgroundColor = this.options.highlightcolor; - textField.className = 'editor_field'; - var size = this.options.size || this.options.cols || 0; - if (size != 0) textField.size = size; - if (this.options.submitOnBlur) - textField.onblur = this.onSubmit.bind(this); - this.editField = textField; - } else { - this.options.textarea = true; - var textArea = document.createElement("textarea"); - textArea.obj = this; - textArea.name = "value"; - textArea.value = this.convertHTMLLineBreaks(text); - textArea.rows = this.options.rows; - textArea.cols = this.options.cols || 40; - textArea.className = 'editor_field'; - if (this.options.submitOnBlur) - textArea.onblur = this.onSubmit.bind(this); - this.editField = textArea; - } - - if(this.options.loadTextURL) { - this.loadExternalText(); - } - this.form.appendChild(this.editField); - }, - getText: function() { - return this.element.innerHTML; - }, - loadExternalText: function() { - Element.addClassName(this.form, this.options.loadingClassName); - this.editField.disabled = true; - new Ajax.Request( - this.options.loadTextURL, - Object.extend({ - asynchronous: true, - onComplete: this.onLoadedExternalText.bind(this) - }, this.options.ajaxOptions) - ); - }, - onLoadedExternalText: function(transport) { - Element.removeClassName(this.form, this.options.loadingClassName); - this.editField.disabled = false; - this.editField.value = transport.responseText.stripTags(); - }, - onclickCancel: function() { - this.onComplete(); - this.leaveEditMode(); - return false; - }, - onFailure: function(transport) { - this.options.onFailure(transport); - if (this.oldInnerHTML) { - this.element.innerHTML = this.oldInnerHTML; - this.oldInnerHTML = null; - } - return false; - }, - onSubmit: function() { - // onLoading resets these so we need to save them away for the Ajax call - var form = this.form; - var value = this.editField.value; - - // do this first, sometimes the ajax call returns before we get a chance to switch on Saving... - // which means this will actually switch on Saving... *after* we've left edit mode causing Saving... - // to be displayed indefinitely - this.onLoading(); - - if (this.options.evalScripts) { - new Ajax.Request( - this.url, Object.extend({ - parameters: this.options.callback(form, value), - onComplete: this.onComplete.bind(this), - onFailure: this.onFailure.bind(this), - asynchronous:true, - evalScripts:true - }, this.options.ajaxOptions)); - } else { - new Ajax.Updater( - { success: this.element, - // don't update on failure (this could be an option) - failure: null }, - this.url, Object.extend({ - parameters: this.options.callback(form, value), - onComplete: this.onComplete.bind(this), - onFailure: this.onFailure.bind(this) - }, this.options.ajaxOptions)); - } - // stop the event to avoid a page refresh in Safari - if (arguments.length > 1) { - Event.stop(arguments[0]); - } - return false; - }, - onLoading: function() { - this.saving = true; - this.removeForm(); - this.leaveHover(); - this.showSaving(); - }, - showSaving: function() { - this.oldInnerHTML = this.element.innerHTML; - this.element.innerHTML = this.options.savingText; - Element.addClassName(this.element, this.options.savingClassName); - this.element.style.backgroundColor = this.originalBackground; - Element.show(this.element); - }, - removeForm: function() { - if(this.form) { - if (this.form.parentNode) Element.remove(this.form); - this.form = null; - } - }, - enterHover: function() { - if (this.saving) return; - this.element.style.backgroundColor = this.options.highlightcolor; - if (this.effect) { - this.effect.cancel(); - } - Element.addClassName(this.element, this.options.hoverClassName) - }, - leaveHover: function() { - if (this.options.backgroundColor) { - this.element.style.backgroundColor = this.oldBackground; - } - Element.removeClassName(this.element, this.options.hoverClassName) - if (this.saving) return; - this.effect = new Effect.Highlight(this.element, { - startcolor: this.options.highlightcolor, - endcolor: this.options.highlightendcolor, - restorecolor: this.originalBackground - }); - }, - leaveEditMode: function() { - Element.removeClassName(this.element, this.options.savingClassName); - this.removeForm(); - this.leaveHover(); - this.element.style.backgroundColor = this.originalBackground; - Element.show(this.element); - if (this.options.externalControl) { - Element.show(this.options.externalControl); - } - this.editing = false; - this.saving = false; - this.oldInnerHTML = null; - this.onLeaveEditMode(); - }, - onComplete: function(transport) { - this.leaveEditMode(); - this.options.onComplete.bind(this)(transport, this.element); - }, - onEnterEditMode: function() {}, - onLeaveEditMode: function() {}, - dispose: function() { - if (this.oldInnerHTML) { - this.element.innerHTML = this.oldInnerHTML; - } - this.leaveEditMode(); - Event.stopObserving(this.element, 'click', this.onclickListener); - Event.stopObserving(this.element, 'mouseover', this.mouseoverListener); - Event.stopObserving(this.element, 'mouseout', this.mouseoutListener); - if (this.options.externalControl) { - Event.stopObserving(this.options.externalControl, 'click', this.onclickListener); - Event.stopObserving(this.options.externalControl, 'mouseover', this.mouseoverListener); - Event.stopObserving(this.options.externalControl, 'mouseout', this.mouseoutListener); - } - } -}; - -Ajax.InPlaceCollectionEditor = Class.create(); -Object.extend(Ajax.InPlaceCollectionEditor.prototype, Ajax.InPlaceEditor.prototype); -Object.extend(Ajax.InPlaceCollectionEditor.prototype, { - createEditField: function() { - if (!this.cached_selectTag) { - var selectTag = document.createElement("select"); - var collection = this.options.collection || []; - var optionTag; - collection.each(function(e,i) { - optionTag = document.createElement("option"); - optionTag.value = (e instanceof Array) ? e[0] : e; - if(this.options.value==optionTag.value) optionTag.selected = true; - optionTag.appendChild(document.createTextNode((e instanceof Array) ? e[1] : e)); - selectTag.appendChild(optionTag); - }.bind(this)); - this.cached_selectTag = selectTag; - } - - this.editField = this.cached_selectTag; - if(this.options.loadTextURL) this.loadExternalText(); - this.form.appendChild(this.editField); - this.options.callback = function(form, value) { - return "value=" + encodeURIComponent(value); - } - } -}); - -// Delayed observer, like Form.Element.Observer, -// but waits for delay after last key input -// Ideal for live-search fields - -Form.Element.DelayedObserver = Class.create(); -Form.Element.DelayedObserver.prototype = { - initialize: function(element, delay, callback) { - this.delay = delay || 0.5; - this.element = $(element); - this.callback = callback; - this.timer = null; - this.lastValue = $F(this.element); - Event.observe(this.element,'keyup',this.delayedListener.bindAsEventListener(this)); - }, - delayedListener: function(event) { - if(this.lastValue == $F(this.element)) return; - if(this.timer) clearTimeout(this.timer); - this.timer = setTimeout(this.onTimerEvent.bind(this), this.delay * 1000); - this.lastValue = $F(this.element); - }, - onTimerEvent: function() { - this.timer = null; - this.callback(this.element, $F(this.element)); - } -}; |