commit | author | age
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cfa858
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function AppMenu() { |
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var self = this; |
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var _app_menu_selector; |
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var _app_menu_mbreite; |
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var _app_menu_url_prefix = ""; |
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var _app_menu_template; |
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/* |
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* die nachfolgenden Funktionen steuern das ein- und |
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* ausblenden des menues |
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*/ |
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this.init = function (url_prefix, mdesc, mtpl, mselector, mbreite) { |
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self._app_menu_selector = mselector; |
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self._app_menu_mbreite = mbreite; |
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var menu = document.querySelector(self._app_menu_selector); |
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menu.style.flexBasis = '0em'; |
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self._app_menu_url_prefix = url_prefix; |
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/* |
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Die Menue-Vorlage wird einmal zu Beginn geladen und |
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waehrend dem Programmlauf immer wieder neu zum Rendern |
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einer dynamisch gelandenen Menuebeschreibung verwendet |
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*/ |
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var request = new XMLHttpRequest(); |
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request.open("GET", mtpl); |
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request.addEventListener('load', function(event) { |
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if (request.status >= 200 && request.status < 300) { |
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self._app_menu_template = request.responseText; |
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Mustache.parse(self._app_menu_template); // optional, speeds up future uses |
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self.app_menu_laden(mdesc); |
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} else { |
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console.warn(request.statusText, request.responseText); |
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} |
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}); |
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request.send(); |
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}; |
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this.app_menu_do_toggle = function(elem) { |
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self.toggle(); |
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}; |
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this.toggle = function() { |
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var menuDiv = document.querySelector(self._app_menu_selector); |
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if(menuDiv.classList.contains('app-menu-open')) { |
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menuDiv.classList.remove('app-menu-open'); |
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menuDiv.style.flexBasis = '0em'; |
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} else { |
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menuDiv.classList.add('app-menu-open'); |
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menuDiv.style.flexBasis = self._app_menu_mbreite; |
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} |
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}; |
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/* |
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* ab hier Steuerung des Menueinhalts |
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*/ |
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/* |
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* Menuebeschreibung als JSON-Datei laden |
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* mdesc: der URL einer JSON-Datei mit einer Menuebeschreibung |
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* richtung: z.Zt. unbenutzt: Animationsrichtung |
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*/ |
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this.app_menu_laden = function(mdesc, richtung) { |
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var xmlhttp = new XMLHttpRequest(); |
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var url = self._app_menu_url_prefix + mdesc; |
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xmlhttp.onreadystatechange = function() { |
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if (this.readyState == 4 && this.status == 200) { |
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self.app_menu_bauen(JSON.parse(this.responseText), richtung); |
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} |
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}; |
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xmlhttp.open("GET", url, true); |
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xmlhttp.send(); |
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}; |
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/* |
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Aus einer Menuebeschreibung im JSON-Format mit Hilfe |
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von Mustache und der zu Beginn geladenen HTML-Vorlage |
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ein div-Element zusammenbauen, das als Menue eingeblendet |
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werden kann und dem Element _app_menu_selector hinzufuegen |
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*/ |
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this.app_menu_bauen = function(menuejs, richtung) { |
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// neues Menue als div-Element zusammensetzen |
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var menuDiv = document.createElement("div"); |
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menuDiv.classList.add('app-menu-content'); |
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menuDiv.style.position = 'relative'; |
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menuDiv.innerHTML = Mustache.render(self._app_menu_template, menuejs); |
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// altes Menue loeschen |
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self.app_menu_remove_event_listener_multi('.smenu', 'click', self.app_menu_klick_herunter); |
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self.app_menu_remove_event_listener_multi('.bitem', 'click', self.app_menu_klick_herauf); |
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self.app_menu_remove_event_listener_multi('.mitem', 'click', self.app_menu_ausfuehren); |
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var menu = document.querySelector(self._app_menu_selector); |
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menu.innerHTML = ''; |
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// neues Menue hinzufuegen |
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menu.append(menuDiv); |
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self.app_menu_add_event_listener_multi('.smenu', 'click', self.app_menu_klick_herunter); |
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self.app_menu_add_event_listener_multi('.bitem', 'click', self.app_menu_klick_herauf); |
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self.app_menu_add_event_listener_multi('.mitem', 'click', self.app_menu_ausfuehren); |
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menuDiv = document.querySelector('.app-menu-content'); |
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menuDiv.classList.add('slidein-from-right'); |
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}; |
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this.app_menu_klick_herunter = function() { |
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self.app_menu_laden(this.getAttribute('data-verweis'), 'herunter'); |
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}; |
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this.app_menu_klick_herauf = function() { |
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self.app_menu_laden(this.getAttribute('data-verweis'), 'herauf'); |
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}; |
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this.app_menu_ausfuehren = function() { |
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var functionName = this.getAttribute('data-verweis'); |
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eval(functionName + "(this)"); |
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}; |
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/* --- Helferlein ---*/ |
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/* |
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sel - '.smenu' |
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evt - 'click' fuer onclick |
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func - der verweis auf die funktion |
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*/ |
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this.app_menu_remove_event_listener_multi = function(sel, evt, func) { |
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var elem = document.querySelectorAll(sel); |
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for (var index = 0; index < elem.length; index++) { |
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elem[index].removeEventListener(evt, func); |
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} |
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}; |
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this.app_menu_add_event_listener_multi = function(sel, evt, func) { |
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var elem = document.querySelectorAll(sel); |
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for (var index = 0; index < elem.length; index++) { |
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elem[index].addEventListener(evt, func); |
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} |
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}; |
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} |