talho/openphin

/*!
* Ext JS Library 3.3.0
* Copyright(c) 2006-2010 Ext JS, Inc.
* licensing@extjs.com
* http://www.extjs.com/license
*/
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
        });
    },

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

    beforeDestroy : function() {
        if(this.dd){
            this.dd.unreg();
        }
        Ext.ux.Portal.superclass.beforeDestroy.call(this);
    }
});

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

Ext.ux.Portal.DropZone = Ext.extend(Ext.dd.DropTarget, {

    constructor : 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;
    },

    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, overSelf = false;

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

        pos = (match && p ? pos : c.items.getCount()) + (overSelf ? -1 : 0);
        var overEvent = this.createEvent(dd, e, data, col, c, pos);

        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: overSelf || (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,
          panel = dd.panel,
          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();
          panel.el.dom.parentNode.removeChild(dd.panel.el.dom);

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

      }
      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;
    },

    // unregister the dropzone from ScrollManager
    unreg: function() {
        Ext.dd.ScrollManager.unregister(this.portal.body);
        Ext.ux.Portal.DropZone.superclass.unreg.call(this);
    }
});

Ext.ux.PortalColumn = Ext.extend(Ext.Container, {
    layout : 'anchor',
    defaultType : 'portlet',
    cls : 'x-portal-column'
});

Ext.reg('portalcolumn', Ext.ux.PortalColumn);

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

Ext.reg('portlet', Ext.ux.Portlet);