Monorail Hands-On

/*
 * Ext JS Library 1.0.1
 * Copyright(c) 2006-2007, Ext JS, LLC.
 * licensing@extjs.com
 * 
 * http://www.extjs.com/license
 */


Ext.BasicDialog = function(el, config){
    this.el = Ext.get(el);
    var dh = Ext.DomHelper;
    if(!this.el && config && config.autoCreate){
        if(typeof config.autoCreate == "object"){
            if(!config.autoCreate.id){
                config.autoCreate.id = el;
            }
            this.el = dh.append(document.body,
                        config.autoCreate, true);
        }else{
            this.el = dh.append(document.body,
                        {tag: "div", id: el, style:'visibility:hidden;'}, true);
        }
    }
    el = this.el;                                                                                                                                                                                                                                                                                                                                                                                                  
    el.setDisplayed(true);
    el.hide = this.hideAction;
    this.id = el.id;
    el.addClass("x-dlg");

    Ext.apply(this, config);

    this.proxy = el.createProxy("x-dlg-proxy");
    this.proxy.hide = this.hideAction;
    this.proxy.setOpacity(.5);
    this.proxy.hide();

    if(config.width){
        el.setWidth(config.width);
    }
    if(config.height){
        el.setHeight(config.height);
    }
    this.size = el.getSize();
    if(typeof config.x != "undefined" && typeof config.y != "undefined"){
        this.xy = [config.x,config.y];
    }else{
        this.xy = el.getCenterXY(true);
    }
    
    this.header = el.child("/.x-dlg-hd");
    
    this.body = el.child("/.x-dlg-bd");
    
    this.footer = el.child("/.x-dlg-ft");

    if(!this.header){
        this.header = el.createChild({tag: "div", cls:"x-dlg-hd", html: " "}, this.body ? this.body.dom : null);
    }
    if(!this.body){
        this.body = el.createChild({tag: "div", cls:"x-dlg-bd"});
    }

    this.header.unselectable();
    if(this.title){
        this.header.update(this.title);
    }
    
    this.focusEl = el.createChild({tag: "a", href:"#", cls:"x-dlg-focus", tabIndex:"-1"});
    this.focusEl.swallowEvent("click", true);

    this.header.wrap({cls:"x-dlg-hd-right"}).wrap({cls:"x-dlg-hd-left"}, true);

    
    this.bwrap = this.body.wrap({tag: "div", cls:"x-dlg-dlg-body"});
    if(this.footer){
        this.bwrap.dom.appendChild(this.footer.dom);
    }

    this.bg = this.el.createChild({
        tag: "div", cls:"x-dlg-bg",
        html: '<div class="x-dlg-bg-left"><div class="x-dlg-bg-right"><div class="x-dlg-bg-center">&#160;</div></div></div>'
    });
    this.centerBg = this.bg.child("div.x-dlg-bg-center");


    if(this.autoScroll !== false && !this.autoTabs){
        this.body.setStyle("overflow", "auto");
    }

    this.toolbox = this.el.createChild({cls: "x-dlg-toolbox"});

    if(this.closable !== false){
        this.el.addClass("x-dlg-closable");
        this.close = this.toolbox.createChild({cls:"x-dlg-close"});
        this.close.on("click", this.closeClick, this);
        this.close.addClassOnOver("x-dlg-close-over");
    }
    if(this.collapsible !== false){
        this.collapseBtn = this.toolbox.createChild({cls:"x-dlg-collapse"});
        this.collapseBtn.on("click", this.collapseClick, this);
        this.collapseBtn.addClassOnOver("x-dlg-collapse-over");
        this.header.on("dblclick", this.collapseClick, this);
    }
    if(this.resizable !== false){
        this.el.addClass("x-dlg-resizable");
        this.resizer = new Ext.Resizable(el, {
            minWidth: this.minWidth || 80,
            minHeight:this.minHeight || 80,
            handles: this.resizeHandles || "all",
            pinned: true
        });
        this.resizer.on("beforeresize", this.beforeResize, this);
        this.resizer.on("resize", this.onResize, this);
    }
    if(this.draggable !== false){
        el.addClass("x-dlg-draggable");
        if (!this.proxyDrag) {
            var dd = new Ext.dd.DD(el.dom.id, "WindowDrag");
        }
        else {
            var dd = new Ext.dd.DDProxy(el.dom.id, "WindowDrag", {dragElId: this.proxy.id});
        }
        dd.setHandleElId(this.header.id);
        dd.endDrag = this.endMove.createDelegate(this);
        dd.startDrag = this.startMove.createDelegate(this);
        dd.onDrag = this.onDrag.createDelegate(this);
        dd.scroll = false;
        this.dd = dd;
    }
    if(this.modal){
        this.mask = dh.append(document.body, {tag: "div", cls:"x-dlg-mask"}, true);
        this.mask.enableDisplayMode("block");
        this.mask.hide();
        this.el.addClass("x-dlg-modal");
    }
    if(this.shadow){
        this.shadow = new Ext.Shadow({
            mode : typeof this.shadow == "string" ? this.shadow : "sides",
            offset : this.shadowOffset
        });
    }else{
        this.shadowOffset = 0;
    }
    if(Ext.useShims && this.shim !== false){
        this.shim = this.el.createShim();
        this.shim.hide = this.hideAction;
        this.shim.hide();
    }else{
        this.shim = false;
    }
    if(this.autoTabs){
        this.initTabs();
    }
    this.addEvents({
        
        "keydown" : true,
        
        "move" : true,
        
        "resize" : true,
        
        "beforehide" : true,
        
        "hide" : true,
        
        "beforeshow" : true,
        
        "show" : true
    });
    el.on("keydown", this.onKeyDown, this);
    el.on("mousedown", this.toFront, this);
    Ext.EventManager.onWindowResize(this.adjustViewport, this, true);
    this.el.hide();
    Ext.DialogManager.register(this);
    Ext.BasicDialog.superclass.constructor.call(this);
};

Ext.extend(Ext.BasicDialog, Ext.util.Observable, {
    shadowOffset: 5,
    minHeight: 80,
    minWidth: 200,
    minButtonWidth: 75,
    defaultButton: null,
    buttonAlign: "right",
    tabTag: 'div',
    firstShow: true,

    
    setTitle : function(text){
        this.header.update(text);
        return this;
    },

    
    closeClick : function(){
        this.hide();
    },

    
    collapseClick : function(){
        this[this.collapsed ? "expand" : "collapse"]();
    },

    
    collapse : function(){
        if(!this.collapsed){
            this.collapsed = true;
            this.el.addClass("x-dlg-collapsed");
            this.restoreHeight = this.el.getHeight();
            this.resizeTo(this.el.getWidth(), this.header.getHeight());
        }
    },

    
    expand : function(){
        if(this.collapsed){
            this.collapsed = false;
            this.el.removeClass("x-dlg-collapsed");
            this.resizeTo(this.el.getWidth(), this.restoreHeight);
        }
    },

    
    initTabs : function(){
        var tabs = this.getTabs();
        while(tabs.getTab(0)){
            tabs.removeTab(0);
        }
        this.el.select(this.tabTag+'.x-dlg-tab').each(function(el){
            var dom = el.dom;
            tabs.addTab(Ext.id(dom), dom.title);
            dom.title = "";
        });
        tabs.activate(0);
        return tabs;
    },

    
    beforeResize : function(){
        this.resizer.minHeight = Math.max(this.minHeight, this.getHeaderFooterHeight(true)+40);
    },

    
    onResize : function(){
        this.refreshSize();
        this.syncBodyHeight();
        this.adjustAssets();
        this.focus();
        this.fireEvent("resize", this, this.size.width, this.size.height);
    },

    
    onKeyDown : function(e){
        if(this.isVisible()){
            this.fireEvent("keydown", this, e);
        }
    },

    
    resizeTo : function(width, height){
        this.el.setSize(width, height);
        this.size = {width: width, height: height};
        this.syncBodyHeight();
        if(this.fixedcenter){
            this.center();
        }
        if(this.isVisible()){
            this.constrainXY();
            this.adjustAssets();
        }
        this.fireEvent("resize", this, width, height);
        return this;
    },


    
    setContentSize : function(w, h){
        h += this.getHeaderFooterHeight() + this.body.getMargins("tb");
        w += this.body.getMargins("lr") + this.bwrap.getMargins("lr") + this.centerBg.getPadding("lr");
        
            h +=  this.body.getPadding("tb") + this.bwrap.getBorderWidth("tb") + this.body.getBorderWidth("tb") + this.el.getBorderWidth("tb");
            w += this.body.getPadding("lr") + this.bwrap.getBorderWidth("lr") + this.body.getBorderWidth("lr") + this.bwrap.getPadding("lr") + this.el.getBorderWidth("lr");
        
        if(this.tabs){
            h += this.tabs.stripWrap.getHeight() + this.tabs.bodyEl.getMargins("tb") + this.tabs.bodyEl.getPadding("tb");
            w += this.tabs.bodyEl.getMargins("lr") + this.tabs.bodyEl.getPadding("lr");
        }
        this.resizeTo(w, h);
        return this;
    },

    
    addKeyListener : function(key, fn, scope){
        var keyCode, shift, ctrl, alt;
        if(typeof key == "object" && !(key instanceof Array)){
            keyCode = key["key"];
            shift = key["shift"];
            ctrl = key["ctrl"];
            alt = key["alt"];
        }else{
            keyCode = key;
        }
        var handler = function(dlg, e){
            if((!shift || e.shiftKey) && (!ctrl || e.ctrlKey) &&  (!alt || e.altKey)){
                var k = e.getKey();
                if(keyCode instanceof Array){
                    for(var i = 0, len = keyCode.length; i < len; i++){
                        if(keyCode[i] == k){
                          fn.call(scope || window, dlg, k, e);
                          return;
                        }
                    }
                }else{
                    if(k == keyCode){
                        fn.call(scope || window, dlg, k, e);
                    }
                }
            }
        };
        this.on("keydown", handler);
        return this;
    },

    
    getTabs : function(){
        if(!this.tabs){
            this.el.addClass("x-dlg-auto-tabs");
            this.body.addClass(this.tabPosition == "bottom" ? "x-tabs-bottom" : "x-tabs-top");
            this.tabs = new Ext.TabPanel(this.body.dom, this.tabPosition == "bottom");
        }
        return this.tabs;
    },

    
    addButton : function(config, handler, scope){
        var dh = Ext.DomHelper;
        if(!this.footer){
            this.footer = dh.append(this.bwrap, {tag: "div", cls:"x-dlg-ft"}, true);
        }
        if(!this.btnContainer){
            var tb = this.footer.createChild({
                tag:"div",
                cls:"x-dlg-btns x-dlg-btns-"+this.buttonAlign,
                html:'<table cellspacing="0"><tbody><tr></tr></tbody></table><div class="x-clear"></div>'
            }, null, true);
            this.btnContainer = tb.firstChild.firstChild.firstChild;
        }
        var bconfig = {
            handler: handler,
            scope: scope,
            minWidth: this.minButtonWidth,
            hideParent:true
        };
        if(typeof config == "string"){
            bconfig.text = config;
        }else{
            if(config.tag){
                bconfig.dhconfig = config;
            }else{
                Ext.apply(bconfig, config);
            }
        }
        var btn = new Ext.Button(
            this.btnContainer.appendChild(document.createElement("td")),
            bconfig
        );
        this.syncBodyHeight();
        if(!this.buttons){
            
            this.buttons = [];
        }
        this.buttons.push(btn);
        return btn;
    },

    
    setDefaultButton : function(btn){
        this.defaultButton = btn;
        return this;
    },

    
    getHeaderFooterHeight : function(safe){
        var height = 0;
        if(this.header){
           height += this.header.getHeight();
        }
        if(this.footer){
           var fm = this.footer.getMargins();
            height += (this.footer.getHeight()+fm.top+fm.bottom);
        }
        height += this.bwrap.getPadding("tb")+this.bwrap.getBorderWidth("tb");
        height += this.centerBg.getPadding("tb");
        return height;
    },

    
    syncBodyHeight : function(){
        var bd = this.body, cb = this.centerBg, bw = this.bwrap;
        var height = this.size.height - this.getHeaderFooterHeight(false);
        bd.setHeight(height-bd.getMargins("tb"));
        var hh = this.header.getHeight();
        var h = this.size.height-hh;
        cb.setHeight(h);
        bw.setLeftTop(cb.getPadding("l"), hh+cb.getPadding("t"));
        bw.setHeight(h-cb.getPadding("tb"));
        bw.setWidth(this.el.getWidth(true)-cb.getPadding("lr"));
        bd.setWidth(bw.getWidth(true));
        if(this.tabs){
            this.tabs.syncHeight();
            if(Ext.isIE){
                this.tabs.el.repaint();
            }
        }
    },

    
    restoreState : function(){
        var box = Ext.state.Manager.get(this.stateId || (this.el.id + "-state"));
        if(box && box.width){
            this.xy = [box.x, box.y];
            this.resizeTo(box.width, box.height);
        }
        return this;
    },

    
    beforeShow : function(){
        this.expand();
        if(this.fixedcenter){
            this.xy = this.el.getCenterXY(true);
        }
        if(this.modal){
            Ext.get(document.body).addClass("x-body-masked");
            this.mask.setSize(Ext.lib.Dom.getViewWidth(true), Ext.lib.Dom.getViewHeight(true));
            this.mask.show();
        }
        this.constrainXY();
    },

    
    animShow : function(){
        var b = Ext.get(this.animateTarget, true).getBox();
        this.proxy.setSize(b.width, b.height);
        this.proxy.setLocation(b.x, b.y);
        this.proxy.show();
        this.proxy.setBounds(this.xy[0], this.xy[1], this.size.width, this.size.height,
                    true, .35, this.showEl.createDelegate(this));
    },

    
    show : function(animateTarget){
        if (this.fireEvent("beforeshow", this) === false){
            return;
        }
        if(this.syncHeightBeforeShow){
            this.syncBodyHeight();
        }else if(this.firstShow){
            this.firstShow = false;
            this.syncBodyHeight(); 
        }
        this.animateTarget = animateTarget || this.animateTarget;
        if(!this.el.isVisible()){
            this.beforeShow();
            if(this.animateTarget){
                this.animShow();
            }else{
                this.showEl();
            }
        }
        return this;
    },

    
    showEl : function(){
        this.proxy.hide();
        this.el.setXY(this.xy);
        this.el.show();
        this.adjustAssets(true);
        this.toFront();
        this.focus();
        
        if(Ext.isIE){
            this.el.repaint();
        }
        this.fireEvent("show", this);
    },

    
    focus : function(){
        if(this.defaultButton){
            this.defaultButton.focus();
        }else{
            this.focusEl.focus();
        }
    },

    
    constrainXY : function(){
        if(this.constraintoviewport !== false){
            if(!this.viewSize){
                if(this.container){
                    var s = this.container.getSize();
                    this.viewSize = [s.width, s.height];
                }else{
                    this.viewSize = [Ext.lib.Dom.getViewWidth(),Ext.lib.Dom.getViewHeight()];
                }
            }
            var s = Ext.get(this.container||document).getScroll();

            var x = this.xy[0], y = this.xy[1];
            var w = this.size.width, h = this.size.height;
            var vw = this.viewSize[0], vh = this.viewSize[1];
            
            var moved = false;
            
            if(x + w > vw+s.left){
                x = vw - w;
                moved = true;
            }
            if(y + h > vh+s.top){
                y = vh - h;
                moved = true;
            }
            
            if(x < s.left){
                x = s.left;
                moved = true;
            }
            if(y < s.top){
                y = s.top;
                moved = true;
            }
            if(moved){
                
                this.xy = [x, y];
                if(this.isVisible()){
                    this.el.setLocation(x, y);
                    this.adjustAssets();
                }
            }
        }
    },

    
    onDrag : function(){
        if(!this.proxyDrag){
            this.xy = this.el.getXY();
            this.adjustAssets();
        }
    },

    
    adjustAssets : function(doShow){
        var x = this.xy[0], y = this.xy[1];
        var w = this.size.width, h = this.size.height;
        if(doShow === true){
            if(this.shadow){
                this.shadow.show(this.el);
            }
            if(this.shim){
                this.shim.show();
            }
        }
        if(this.shadow && this.shadow.isVisible()){
            this.shadow.show(this.el);
        }
        if(this.shim && this.shim.isVisible()){
            this.shim.setBounds(x, y, w, h);
        }
    },

    
    adjustViewport : function(w, h){
        if(!w || !h){
            w = Ext.lib.Dom.getViewWidth();
            h = Ext.lib.Dom.getViewHeight();
        }
        
        this.viewSize = [w, h];
        if(this.modal && this.mask.isVisible()){
            this.mask.setSize(w, h); 
            this.mask.setSize(Ext.lib.Dom.getViewWidth(true), Ext.lib.Dom.getViewHeight(true));
        }
        if(this.isVisible()){
            this.constrainXY();
        }
    },

    
    destroy : function(removeEl){
        if(this.isVisible()){
            this.animateTarget = null;
            this.hide();
        }
        Ext.EventManager.removeResizeListener(this.adjustViewport, this);
        if(this.tabs){
            this.tabs.destroy(removeEl);
        }
        Ext.destroy(
             this.shim,
             this.proxy,
             this.resizer,
             this.close,
             this.mask
        );
        if(this.dd){
            this.dd.unreg();
        }
        if(this.buttons){
           for(var i = 0, len = this.buttons.length; i < len; i++){
               this.buttons[i].destroy();
           }
        }
        this.el.removeAllListeners();
        if(removeEl === true){
            this.el.update("");
            this.el.remove();
        }
        Ext.DialogManager.unregister(this);
    },

    
    startMove : function(){
        if(this.proxyDrag){
            this.proxy.show();
        }
        if(this.constraintoviewport !== false){
            this.dd.constrainTo(document.body, {right: this.shadowOffset, bottom: this.shadowOffset});
        }
    },

    
    endMove : function(){
        if(!this.proxyDrag){
            Ext.dd.DD.prototype.endDrag.apply(this.dd, arguments);
        }else{
            Ext.dd.DDProxy.prototype.endDrag.apply(this.dd, arguments);
            this.proxy.hide();
        }
        this.refreshSize();
        this.adjustAssets();
        this.focus();
        this.fireEvent("move", this, this.xy[0], this.xy[1]);
    },

    
    toFront : function(){
        Ext.DialogManager.bringToFront(this);
        return this;
    },

    
    toBack : function(){
        Ext.DialogManager.sendToBack(this);
        return this;
    },

    
    center : function(){
        var xy = this.el.getCenterXY(true);
        this.moveTo(xy[0], xy[1]);
        return this;
    },

    
    moveTo : function(x, y){
        this.xy = [x,y];
        if(this.isVisible()){
            this.el.setXY(this.xy);
            this.adjustAssets();
        }
        return this;
    },

    
    alignTo : function(element, position, offsets){
        this.xy = this.el.getAlignToXY(element, position, offsets);
        if(this.isVisible()){
            this.el.setXY(this.xy);
            this.adjustAssets();
        }
        return this;
    },

    
    anchorTo : function(el, alignment, offsets, monitorScroll){
        var action = function(){
            this.alignTo(el, alignment, offsets);
        };
        Ext.EventManager.onWindowResize(action, this);
        var tm = typeof monitorScroll;
        if(tm != 'undefined'){
            Ext.EventManager.on(window, 'scroll', action, this,
                {buffer: tm == 'number' ? monitorScroll : 50});
        }
        action.call(this);
        return this;
    },

    
    isVisible : function(){
        return this.el.isVisible();
    },

    
    animHide : function(callback){
        var b = Ext.get(this.animateTarget).getBox();
        this.proxy.show();
        this.proxy.setBounds(this.xy[0], this.xy[1], this.size.width, this.size.height);
        this.el.hide();
        this.proxy.setBounds(b.x, b.y, b.width, b.height, true, .35,
                    this.hideEl.createDelegate(this, [callback]));
    },

    
    hide : function(callback){
        if (this.fireEvent("beforehide", this) === false){
            return;
        }
        if(this.shadow){
            this.shadow.hide();
        }
        if(this.shim) {
          this.shim.hide();
        }
        if(this.animateTarget){
           this.animHide(callback);
        }else{
            this.el.hide();
            this.hideEl(callback);
        }
        return this;
    },

    
    hideEl : function(callback){
        this.proxy.hide();
        if(this.modal){
            this.mask.hide();
            Ext.get(document.body).removeClass("x-body-masked");
        }
        this.fireEvent("hide", this);
        if(typeof callback == "function"){
            callback();
        }
    },

    
    hideAction : function(){
        this.setLeft("-10000px");
        this.setTop("-10000px");
        this.setStyle("visibility", "hidden");
    },

    
    refreshSize : function(){
        this.size = this.el.getSize();
        this.xy = this.el.getXY();
        Ext.state.Manager.set(this.stateId || this.el.id + "-state", this.el.getBox());
    },

    
    
    setZIndex : function(index){
        if(this.modal){
            this.mask.setStyle("z-index", index);
        }
        if(this.shim){
            this.shim.setStyle("z-index", ++index);
        }
        if(this.shadow){
            this.shadow.setZIndex(++index);
        }
        this.el.setStyle("z-index", ++index);
        if(this.proxy){
            this.proxy.setStyle("z-index", ++index);
        }
        if(this.resizer){
            this.resizer.proxy.setStyle("z-index", ++index);
        }

        this.lastZIndex = index;
    },

    
    getEl : function(){
        return this.el;
    }
});


Ext.DialogManager = function(){
    var list = {};
    var accessList = [];
    var front = null;

    
    var sortDialogs = function(d1, d2){
        return (!d1._lastAccess || d1._lastAccess < d2._lastAccess) ? -1 : 1;
    };

    
    var orderDialogs = function(){
        accessList.sort(sortDialogs);
        var seed = Ext.DialogManager.zseed;
        for(var i = 0, len = accessList.length; i < len; i++){
            var dlg = accessList[i];
            if(dlg){
                dlg.setZIndex(seed + (i*10));
            }
        }
    };

    return {
        
        zseed : 9000,

        
        register : function(dlg){
            list[dlg.id] = dlg;
            accessList.push(dlg);
        },

        
        unregister : function(dlg){
            delete list[dlg.id];
            if(!accessList.indexOf){
                for(var i = 0, len = accessList.length; i < len; i++){
                    if(accessList[i] == dlg){
                        accessList.splice(i, 1);
                        return;
                    }
                }
            }else{
                var i = accessList.indexOf(dlg);
                if(i != -1){
                    accessList.splice(i, 1);
                }
            }
        },

        
        get : function(id){
            return typeof id == "object" ? id : list[id];
        },

        
        bringToFront : function(dlg){
            dlg = this.get(dlg);
            if(dlg != front){
                front = dlg;
                dlg._lastAccess = new Date().getTime();
                orderDialogs();
            }
            return dlg;
        },

        
        sendToBack : function(dlg){
            dlg = this.get(dlg);
            dlg._lastAccess = -(new Date().getTime());
            orderDialogs();
            return dlg;
        },

        
        hideAll : function(){
            for(var id in list){
                if(list[id] && typeof list[id] != "function" && list[id].isVisible()){
                    list[id].hide();
                }
            }
        }
    };
}();


Ext.LayoutDialog = function(el, config){
    config.autoTabs = false;
    Ext.LayoutDialog.superclass.constructor.call(this, el, config);
    this.body.setStyle({overflow:"hidden", position:"relative"});
    this.layout = new Ext.BorderLayout(this.body.dom, config);
    this.layout.monitorWindowResize = false;
    this.el.addClass("x-dlg-auto-layout");
    
    this.center = Ext.BasicDialog.prototype.center;
    this.on("show", this.layout.layout, this.layout, true);
};
Ext.extend(Ext.LayoutDialog, Ext.BasicDialog, {
    
    endUpdate : function(){
        this.layout.endUpdate();
    },

    
    beginUpdate : function(){
        this.layout.beginUpdate();
    },

    
    getLayout : function(){
        return this.layout;
    },

    showEl : function(){
        Ext.LayoutDialog.superclass.showEl.apply(this, arguments);
        if(Ext.isIE7){
            this.layout.layout();
        }
    },

    
    
    syncBodyHeight : function(){
        Ext.LayoutDialog.superclass.syncBodyHeight.call(this);
        if(this.layout){this.layout.layout();}
    }
});

Ext.MessageBox = function(){
    var dlg, opt, mask, waitTimer;
    var bodyEl, msgEl, textboxEl, textareaEl, progressEl, pp;
    var buttons, activeTextEl, bwidth;

    
    var handleButton = function(button){
        dlg.hide();
        Ext.callback(opt.fn, opt.scope||window, [button, activeTextEl.dom.value], 1);
    };

    
    var handleHide = function(){
        if(opt && opt.cls){
            dlg.el.removeClass(opt.cls);
        }
        if(waitTimer){
            Ext.TaskMgr.stop(waitTimer);
            waitTimer = null;
        }
    };

    
    var updateButtons = function(b){
        var width = 0;
        if(!b){
            buttons["ok"].hide();
            buttons["cancel"].hide();
            buttons["yes"].hide();
            buttons["no"].hide();
            dlg.footer.dom.style.display = 'none';
            return width;
        }
        dlg.footer.dom.style.display = '';
        for(var k in buttons){
            if(typeof buttons[k] != "function"){
                if(b[k]){
                    buttons[k].show();
                    buttons[k].setText(typeof b[k] == "string" ? b[k] : Ext.MessageBox.buttonText[k]);
                    width += buttons[k].el.getWidth()+15;
                }else{
                    buttons[k].hide();
                }
            }
        }
        return width;
    };

    
    var handleEsc = function(d, k, e){
        if(opt && opt.closable !== false){
            dlg.hide();
        }
        if(e){
            e.stopEvent();
        }
    };

    return {
        
        getDialog : function(){
           if(!dlg){
                dlg = new Ext.BasicDialog("x-msg-box", {
                    autoCreate : true,
                    shadow: true,
                    draggable: true,
                    resizable:false,
                    constraintoviewport:false,
                    fixedcenter:true,
                    collapsible : false,
                    shim:true,
                    modal: true,
                    width:400, height:100,
                    buttonAlign:"center",
                    closeClick : function(){
                        if(opt && opt.buttons && opt.buttons.no && !opt.buttons.cancel){
                            handleButton("no");
                        }else{
                            handleButton("cancel");
                        }
                    }
                });
                dlg.on("hide", handleHide);
                mask = dlg.mask;
                dlg.addKeyListener(27, handleEsc);
                buttons = {};
                var bt = this.buttonText;
                buttons["ok"] = dlg.addButton(bt["ok"], handleButton.createCallback("ok"));
                buttons["yes"] = dlg.addButton(bt["yes"], handleButton.createCallback("yes"));
                buttons["no"] = dlg.addButton(bt["no"], handleButton.createCallback("no"));
                buttons["cancel"] = dlg.addButton(bt["cancel"], handleButton.createCallback("cancel"));
                bodyEl = dlg.body.createChild({
                    tag:"div",
                    html:'<span class="ext-mb-text"></span><br /><input type="text" class="ext-mb-input" /><textarea class="ext-mb-textarea"></textarea><div class="ext-mb-progress-wrap"><div class="ext-mb-progress"><div class="ext-mb-progress-bar">&#160;</div></div></div>'
                });
                msgEl = bodyEl.dom.firstChild;
                textboxEl = Ext.get(bodyEl.dom.childNodes[2]);
                textboxEl.enableDisplayMode();
                textboxEl.addKeyListener([10,13], function(){
                    if(dlg.isVisible() && opt && opt.buttons){
                        if(opt.buttons.ok){
                            handleButton("ok");
                        }else if(opt.buttons.yes){
                            handleButton("yes");
                        }
                    }
                });
                textareaEl = Ext.get(bodyEl.dom.childNodes[3]);
                textareaEl.enableDisplayMode();
                progressEl = Ext.get(bodyEl.dom.childNodes[4]);
                progressEl.enableDisplayMode();
                var pf = progressEl.dom.firstChild;
                pp = Ext.get(pf.firstChild);
                pp.setHeight(pf.offsetHeight);
            }
            return dlg;
        },

        
        updateText : function(text){
            if(!dlg.isVisible() && !opt.width){
                dlg.resizeTo(this.maxWidth, 100); 
            }
            msgEl.innerHTML = text || '&#160;';
            var w = Math.max(Math.min(opt.width || msgEl.offsetWidth, this.maxWidth), 
                        Math.max(opt.minWidth || this.minWidth, bwidth));
            if(opt.prompt){
                activeTextEl.setWidth(w);
            }
            if(dlg.isVisible()){
                dlg.fixedcenter = false;
            }
            dlg.setContentSize(w, bodyEl.getHeight());
            if(dlg.isVisible()){
                dlg.fixedcenter = true;
            }
            return this;
        },

        
        updateProgress : function(value, text){
            if(text){
                this.updateText(text);
            }
            pp.setWidth(Math.floor(value*progressEl.dom.firstChild.offsetWidth));
            return this;
        },        

        
        isVisible : function(){
            return dlg && dlg.isVisible();  
        },

        
        hide : function(){
            if(this.isVisible()){
                dlg.hide();
            }  
        },

        
        show : function(options){
            if(this.isVisible()){
                this.hide();
            }
            var d = this.getDialog();
            opt = options;
            d.setTitle(opt.title || "&#160;");
            d.close.setDisplayed(opt.closable !== false);
            activeTextEl = textboxEl;
            opt.prompt = opt.prompt || (opt.multiline ? true : false);
            if(opt.prompt){
                if(opt.multiline){
                    textboxEl.hide();
                    textareaEl.show();
                    textareaEl.setHeight(typeof opt.multiline == "number" ?
                        opt.multiline : this.defaultTextHeight);
                    activeTextEl = textareaEl;
                }else{
                    textboxEl.show();
                    textareaEl.hide();
                }
            }else{
                textboxEl.hide();
                textareaEl.hide();
            }
            progressEl.setDisplayed(opt.progress === true);
            this.updateProgress(0);
            activeTextEl.dom.value = opt.value || "";
            if(opt.prompt){
                dlg.setDefaultButton(activeTextEl);
            }else{
                var bs = opt.buttons;
                var db = null;
                if(bs && bs.ok){
                    db = buttons["ok"];
                }else if(bs && bs.yes){
                    db = buttons["yes"];
                }
                dlg.setDefaultButton(db);
            }
            bwidth = updateButtons(opt.buttons);
            this.updateText(opt.msg);
            if(opt.cls){
                d.el.addClass(opt.cls);
            }
            d.proxyDrag = opt.proxyDrag === true;
            d.modal = opt.modal !== false;
            d.mask = opt.modal !== false ? mask : false;
            if(!d.isVisible()){
                
                document.body.appendChild(dlg.el.dom);
                d.animateTarget = null;
                d.show(options.animEl);
            }
            return this;
        },

        
        progress : function(title, msg){
            this.show({
                title : title,
                msg : msg,
                buttons: false,
                progress:true,
                closable:false,
                minWidth: this.minProgressWidth
            });
            return this;
        },

        
        alert : function(title, msg, fn, scope){
            this.show({
                title : title,
                msg : msg,
                buttons: this.OK,
                fn: fn,
                scope : scope
            });
            return this;
        },

        
        wait : function(msg, title){
            this.show({
                title : title,
                msg : msg,
                buttons: false,
                closable:false,
                progress:true,
                modal:true,
                width:300,
                wait:true
            });
            waitTimer = Ext.TaskMgr.start({
                run: function(i){
                    Ext.MessageBox.updateProgress(((((i+20)%20)+1)*5)*.01);
                },
                interval: 1000
            });
            return this;
        },

        
        confirm : function(title, msg, fn, scope){
            this.show({
                title : title,
                msg : msg,
                buttons: this.YESNO,
                fn: fn,
                scope : scope
            });
            return this;
        },

        
        prompt : function(title, msg, fn, scope, multiline){
            this.show({
                title : title,
                msg : msg,
                buttons: this.OKCANCEL,
                fn: fn,
                minWidth:250,
                scope : scope,
                prompt:true,
                multiline: multiline
            });
            return this;
        },

        
        OK : {ok:true},
        
        YESNO : {yes:true, no:true},
        
        OKCANCEL : {ok:true, cancel:true},
        
        YESNOCANCEL : {yes:true, no:true, cancel:true},

        
        defaultTextHeight : 75,
        
        maxWidth : 600,
        
        minWidth : 100,
        
        minProgressWidth : 250,
        
        buttonText : {
            ok : "OK",
            cancel : "Cancel",
            yes : "Yes",
            no : "No"
        }
    };
}();


Ext.Msg = Ext.MessageBox;