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



/*
 * Use our blank image
 */
Ext.BLANK_IMAGE_URL = 'css/images/s.gif';



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()-taskbarEl.getHeight());
    }
    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.cmenu = new Ext.menu.Menu({
            items: [

            ]
        });

        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();
                }
            }
        });
    }
    
    this.cmenu = new Ext.menu.Menu();
    
    desktopEl.on('contextmenu', function(e){
        e.stopEvent();
        if(!this.cmenu.el){
            this.cmenu.render();
        }
        var xy = e.getXY();
        xy[1] -= this.cmenu.el.getHeight();
        this.cmenu.showAt(xy);
    }, this);
};