/*
 * Ext JS Library 2.0 Beta 2
 * Copyright(c) 2006-2007, Ext JS, LLC.
 * licensing@extjs.com
 * 
 * http://extjs.com/license
 */

Ext.app.App = function(cfg){
    Ext.apply(this, cfg);
    this.addEvents({
        'ready' : true,
        'beforeunload' : true
    });

    Ext.onReady(this.initApp, this);
};

Ext.extend(Ext.app.App, Ext.util.Observable, {
    isReady : false,
    modules : null, // Array of objects.  All initialized desktop modules
    startMenu : null,
	desktopConfig : null,

    initApp : function(){
    
      // prevent backspace (history -1) shortcut
  		var map = new Ext.KeyMap(document, [
  		{
  			key: Ext.EventObject.BACKSPACE,
  			stopEvent: true,
  			fn: function(key, e){
  				var t = e.target.tagName;
  				if(t != "INPUT" && t != "TEXTAREA"){
  					e.stopEvent();
  				}
  			}
  		}]);
		
    	this.startConfig = this.startConfig || this.getStartConfig();
      this.desktop = new Ext.Desktop(this);
		  this.startMenu = this.desktop.taskbar.startMenu;

		  this.modules = this.getModules();
        if(this.modules){
            this.initModules(this.modules);
            this.initDesktopConfig();
        }

        this.init();

        Ext.EventManager.on(window, 'beforeunload', this.onUnload, this);
		  this.fireEvent('ready', this);
        this.isReady = true;
    },

	getModules : Ext.emptyFn,
    getStartConfig : Ext.emptyFn,
	getDesktopConfig : Ext.emptyFn,
    init : Ext.emptyFn,

    initModules : function(ms){
		for(var i = 0, len = ms.length; i < len; i++){
            ms[i].app = this;
        }
    },
    
    initDesktopConfig : function(o){
    	if(!o){
			this.getDesktopConfig();
		}else{
			this.desktopConfig = o;
			
			//liuliming--toolbar start button
	        this.desktop.lmtaskbar.initDesktopConfig(this.desktopConfig);
	        //end of liuliming
	        
			this.initAutoRun(o.autorun);
			this.initDesktopContextMenu(o.desktopcontextmenu);
			this.initStartMenu(o.startmenu);
	        this.initQuickStart(o.quickstart);
	        this.initStyles(o.styles);
	        
	        
		}
    },
    
    initAutoRun : function(mIds){
    	if(mIds){
    		for(var i = 0, len = mIds.length; i < len; i++){
	            var m = this.getModule(mIds[i]);
	            if(m){
	            	m.createWindow();
	            }
			}
		}
    },
    initDesktopContextMenu : function(mIds){
    	if(mIds){
    		for(var i = 0, len = mIds.length; i < len; i++){
	            var m = this.getModule(mIds[i]);
	            if(m){
		            if(m.appType == 'menu'){ // handle menu modules
		            	var items = m.items;
		            	for(var i = 0, len = items.length; i < len; i++){
		            		m.launcher.menu.items.push(this.getModule(items[i]).launcher);
		            	}
		            }
		            this.desktop.cmenu.add(m.launcher);
				}
	        }
    	}
    },
    
    initStartMenu : function(mIds){
    	if(mIds){	        
	        for(var i = 0, iLen = mIds.length; i < iLen; i++){
				var m = this.getModule(mIds[i]);
	            if(m){
	            	var app = this;
	            	addItems(this.startMenu, m);
				}
	        }
		}
		
		function addItems(menu, m){ // recursive function, allows sub menus
			if(m.appType == 'menu'){
				var items = m.items;

				for(var j = 0, jLen = items.length; j < jLen; j++){
					var item = app.getModule(items[j]);
					if(item){
						addItems(m.menu, item);
					}
				}

			}
			if(m.launcher){
				menu.add(m.launcher);
			}		
		}
    },

	initQuickStart : function(mIds){
		if(mIds){
			for(var i = 0, len = mIds.length; i < len; i++){
	            var m = this.getModule(mIds[i]);
	            if(m){
	            	m.quickStartButton = this.desktop.taskbar.addQuickStartButton(m.launcher);
				}
	        }
		}
    },
    
    initStyles : function(s){
    	this.desktop.setBackgroundColor(s.backgroundcolor);
    	this.desktop.setTheme(s.theme);
    	this.desktop.setTransparency(s.transparency);
    	this.desktop.setWallpaper(s.wallpaper);
    	this.desktop.setWallpaperPosition(s.wallpaperposition);
    },
    
    getModule : function(name){
    	var ms = this.modules;
    	for(var i = 0, len = ms.length; i < len; i++){
    		if(ms[i].id == name || ms[i].appType == name){
    			return ms[i];
			}
        }
        return '';
    },
    
    addQuickStartButton : function(id){
    	var m = this.getModule(id);
		if(m && !m.quickStartButton){
			m.quickStartButton = this.desktop.taskbar.addQuickStartButton(m.launcher);
			
			// update desktopConfig
			this.desktopConfig.quickstart.push(id);
		}
    },
    
    removeQuickStartButton : function(id){
    	var m = this.getModule(id);
		if(m && m.quickStartButton){
			this.desktop.taskbar.removeQuickStartButton(m.quickStartButton);
			m.quickStartButton = null;
			
			// update desktopConfig
			var qs = this.desktopConfig.quickstart,
				i = 0;
			while(i < qs.length){
				if(qs[i] == id){
					qs.splice(i, 1);
				}else{
					i++;
				}
			}
		}
    },

    onReady : function(fn, scope){
        if(!this.isReady){
            this.on('ready', fn, scope);
        }else{
            fn.call(scope, this);
        }
    },

    getDesktop : function(){
        return this.desktop;
    },

    onUnload : function(e){
        if(this.fireEvent('beforeunload', this) === false){
            e.stopEvent();
        }
    }
});