/*
 * Ext JS Library 2.2
 * Copyright(c) 2006-2008, Ext JS, LLC.
 * licensing@extjs.com
 * 
 * http://extjs.com/license
 */

Ext.Desktop = function(app){
	this.taskbar = new Ext.ux.TaskBar(app);
	var taskbar = this.taskbar;
	
	var desktopEl = Ext.get('x-desktop');
	var taskbarEl = Ext.get('ux-taskbar');
	var shortcuts = Ext.get('x-shortcuts');

	var windows = new Ext.WindowGroup();
	var activeWindow;



		
	function minimizeWin(win){
		win.minimized = true;
		win.hide();
	}

	function markActive(win){
		if(activeWindow && activeWindow != win){
			markInactive(activeWindow);
		}
		taskbar.setActiveButton(win.taskButton);
		activeWindow = win;
		Ext.fly(win.taskButton.el).addClass('active-win');
		win.minimized = false;
	}

	function markInactive(win){
		if(win == activeWindow){
			activeWindow = null;
			Ext.fly(win.taskButton.el).removeClass('active-win');
		}
	}

	function removeWin(win){
		taskbar.removeTaskButton(win.taskButton);
		layout();
	}

	function layout(){
		desktopEl.setHeight(Ext.lib.Dom.getViewHeight());
	}
	Ext.EventManager.onWindowResize(layout);

	this.layout = layout;

	this.createWindow = function(config, cls){
		var win = new (cls||Ext.Window)(
			Ext.applyIf(config||{}, {
				manager: windows,
				minimizable: true,
				maximizable: true
			})
		);
		win.render(desktopEl);
		win.taskButton = taskbar.addTaskButton(win);


		win.animateTarget = win.taskButton.el;
		
		win.on({
			'activate': {
				fn: markActive
			},
			'beforeshow': {
				fn: markActive
			},
			'deactivate': {
				fn: markInactive
			},
			'minimize': {
				fn: minimizeWin
			},
			'close': {
				fn: removeWin
			}
		});
		
		layout();
		return win;
	};

	this.getManager = function(){
		return windows;
	};

	this.getWindow = function(id){
		return windows.get(id);
	}
	
	this.getWinWidth = function(){
		var width = Ext.lib.Dom.getViewWidth();
		return width < 200 ? 200 : width;
	}
		
	this.getWinHeight = function(){
		var height = (Ext.lib.Dom.getViewHeight()-taskbarEl.getHeight());
		return height < 100 ? 100 : height;
	}
		
	this.getWinX = function(width){
		return (Ext.lib.Dom.getViewWidth() - width) / 2
	}
		
	this.getWinY = function(height){
		return (Ext.lib.Dom.getViewHeight()-taskbarEl.getHeight() - height) / 2;
	}

	layout();

	if(shortcuts){
		shortcuts.on('click', function(e, t){
			if(t = e.getTarget('dt', shortcuts)){
				e.stopEvent();
				var module = app.getModule(t.id.replace('-shortcut', ''));
				if(module){
					module.createWindow();
				}
			}
		});
	}
};