//===================================================================
//Portal
Ext.ux.Portal = Ext.extend(Ext.Panel, {
    layout: 'column',
    autoScroll:true,
    cls:'x-portal',
    defaultType: 'portalcolumn',

    initComponent : function(){
        Ext.ux.Portal.superclass.initComponent.call(this);
        this.addEvents({
            validatedrop:true,
            beforedragover:true,
            dragover:true,
            beforedrop:true,
            drop:true,
            autoDestroy: false
        });
    }

   , initEvents : function(){
        Ext.ux.Portal.superclass.initEvents.call(this);
        this.dd = new Ext.ux.Portal.DropZone(this, this.dropConfig);
    }

});
Ext.reg('portal', Ext.ux.Portal);


Ext.ux.Portal.DropZone = function(portal, cfg){
    this.portal = portal;
    Ext.dd.ScrollManager.register(portal.body);
    Ext.ux.Portal.DropZone.superclass.constructor.call(this, portal.bwrap.dom, cfg);
    portal.body.ddScrollConfig = this.ddScrollConfig;
};

Ext.extend(Ext.ux.Portal.DropZone, Ext.dd.DropTarget, {
    ddScrollConfig : {
        vthresh: 50,
        hthresh: -1,
        animate: true,
        increment: 200
    },

    createEvent : function(dd, e, data, col, c, pos){
        return {
            portal: this.portal,
            panel: data.panel,
            columnIndex: col,
            column: c,
            position: pos,
            data: data,
            source: dd,
            rawEvent: e,
            status: this.dropAllowed
        };
    },

    notifyOver : function(dd, e, data){
        var xy = e.getXY(), portal = this.portal, px = dd.proxy;

        // case column widths
        if(!this.grid){
            this.grid = this.getGrid();
        }

        // handle case scroll where scrollbars appear during drag
        var cw = portal.body.dom.clientWidth;
        if(!this.lastCW){
            this.lastCW = cw;
        }else if(this.lastCW != cw){
            this.lastCW = cw;
            portal.doLayout();
            this.grid = this.getGrid();
        }

        // determine column
        var col = 0, xs = this.grid.columnX, cmatch = false;
        for(var len = xs.length; col < len; col++){
            if(xy[0] < (xs[col].x + xs[col].w)){
                cmatch = true;
                break;
            }
        }
        // no match, fix last index
        if(!cmatch){ col--; }

        // find insert position
        var p, match = false, pos = 0,
            c = portal.items.itemAt(col),
            items = c.items.items;

        for(var len = items.length; pos < len; pos++){
            p = items[pos];
            var h = p.el.getHeight();
            if(h !== 0 && (p.el.getY()+(h/2)) > xy[1]){
                match = true;
                break;
            }
        }

        var overEvent = this.createEvent(dd, e, data, col, c,
                match && p ? pos : c.items.getCount());

        if(portal.fireEvent('validatedrop', overEvent) !== false &&
           portal.fireEvent('beforedragover', overEvent) !== false){

            // make sure proxy width is fluid
            px.getProxy().setWidth('auto');

            if(p){
                px.moveProxy(p.el.dom.parentNode, match ? p.el.dom : null);
            }else{
                px.moveProxy(c.el.dom, null);
            }

            this.lastPos = {c: c, col: col, p: match && p ? pos : false};
            this.scrollPos = portal.body.getScroll();

            portal.fireEvent('dragover', overEvent);

            return overEvent.status;
        }else{
            return overEvent.status;
        }

    },

    notifyOut : function(){
        delete this.grid;
    },

    notifyDrop : function (dd, e, data){
        delete this.grid;
        if (!this.lastPos) { return; }
        var c = this.lastPos.c, col = this.lastPos.col, pos = this.lastPos.p;

        var dropEvent = this.createEvent(dd, e, data, col, c, pos !== false ? pos : c.items.getCount());

        if (this.portal.fireEvent('validatedrop', dropEvent) !== false &&
            this.portal.fireEvent('beforedrop', dropEvent) !== false)
        {
            dd.proxy.getProxy().remove();
            dd.panel.el.dom.parentNode.removeChild(dd.panel.el.dom);

            if (pos !== false) { c.insert(pos, dd.panel); }
            else { c.add(dd.panel); }

            c.doLayout();
            this.portal.fireEvent('drop', dropEvent);

            // scroll position is lost on drop, fix it
            var st = this.scrollPos.top;
            if(st)
            {
              var d = this.portal.body.dom;
              setTimeout(function(){ d.scrollTop = st; }, 10);
            }

            setDirty(true);
        }
        delete this.lastPos;
    },

    // internal cache of body and column coords
    getGrid : function(){
        var box = this.portal.bwrap.getBox();
        box.columnX = [];
        this.portal.items.each(function(c) { box.columnX.push({x: c.el.getX(), w: c.el.getWidth()}); });
        return box;
    }
});

//===================================================================
//PortalColumn
Ext.ux.PortalColumn = Ext.extend(Ext.Container, {
    layout: 'anchor',
    autoEl: 'div',
    defaultType: 'portlet',
    cls:'x-portal-column',
    autoDestroy: false
});
Ext.reg('portalcolumn', Ext.ux.PortalColumn);

//===================================================================
//PortalColumn
Ext.ux.Portlet = Ext.extend(Ext.Panel, {
    anchor: '100%',
    frame: true,
    collapsible: false,
    draggable: true,
    cls: 'x-portlet',
    autoDestroy: false
});
Ext.reg('portlet', Ext.ux.Portlet);