/*
 * Ext Scheduler v1.5 beta
 * Copyright(c) 2009-2010 Mats Bryntse Consulting
 * mats@ext-scheduler.com
 * http://www.ext-scheduler.com/license.html
 *
 */
 
Ext.ns('Sch');

/**
 * @ignore
 * @class Sch.LazyResizable
 * @extends Ext.Resizable
 * This class is used to create Resizables on the fly. Used by Sch.plugins.Resize to resize events
 * @constructor
 * @param {Object} config The object containing the configuration of this model.
 */
Sch.LazyResizable = function(el, config, direction, e){
    this.addEvents(
         /**
         * @event partialresize
         * Fired when a resize has snapped to a new value.
         * @param {Ext.Resizable} this
         * @param {Number} newWidth the new width
         * @param {Number} oldWidth the old width
         * @param {Ext.EventObject} e The mousedown event
         */
        'partialresize'
    );
    
    Sch.LazyResizable.superclass.constructor.apply(this, arguments);
    
    // Start the resizing instantly
    this.handleOver();
    this.onMouseDown(this[direction], e);
};

Ext.extend(Sch.LazyResizable, Ext.Resizable, {
    
    // Override to include beforeresize firing to possibly stop the execution
    startSizing : Ext.Resizable.prototype.startSizing.createInterceptor(function(e, handle) {
        return this.fireEvent('beforeresize', this, e) !== false;
    }),
    
    // Override to include partialresize firing
    resizeElement : function(e){
        var box = this.proxy.getBox(),
            oldWidth = this.el.getWidth();
        
        if (box.width !== oldWidth) {
            this.fireEvent('partialresize', this, box.width, oldWidth, e);
            
            if(this.updateBox){
                this.el.setBox(box, false, this.animate, this.duration, null, this.easing);
            }else{
                this.el.setSize(box.width, box.height, this.animate, this.duration, null, this.easing);
            }
            this.updateChildSize();
            if(!this.dynamic){
                this.proxy.hide();
            }
        }
        return box;
    },
    
    
    // Override to be able to pass 'e' as parameter to resizeElement function
    onMouseMove : function(e){
        if(this.enabled && this.activeHandle){
            try{// try catch so if something goes wrong the user doesn't get hung

            if(this.resizeRegion && !this.resizeRegion.contains(e.getPoint())) {
                return;
            }

            //var curXY = this.startPoint;
            var curSize = this.curSize || this.startBox,
                x = this.startBox.x, y = this.startBox.y,
                ox = x, 
                oy = y,
                w = curSize.width, 
                h = curSize.height,
                ow = w, 
                oh = h,
                mw = this.minWidth, 
                mh = this.minHeight,
                mxw = this.maxWidth, 
                mxh = this.maxHeight,
                wi = this.widthIncrement,
                hi = this.heightIncrement,
                eventXY = e.getXY(),
                diffX = -(this.startPoint[0] - Math.max(this.minX, eventXY[0])),
                diffY = -(this.startPoint[1] - Math.max(this.minY, eventXY[1])),
                pos = this.activeHandle.position,
                tw,
                th;
            
            switch(pos){
                case 'east':
                    w += diffX; 
                    w = Math.min(Math.max(mw, w), mxw);
                    break;
                case 'south':
                    h += diffY;
                    h = Math.min(Math.max(mh, h), mxh);
                    break;
                case 'southeast':
                    w += diffX; 
                    h += diffY;
                    w = Math.min(Math.max(mw, w), mxw);
                    h = Math.min(Math.max(mh, h), mxh);
                    break;
                case 'north':
                    diffY = this.constrain(h, diffY, mh, mxh);
                    y += diffY;
                    h -= diffY;
                    break;
                case 'west':
                    diffX = this.constrain(w, diffX, mw, mxw);
                    x += diffX;
                    w -= diffX;
                    break;
                case 'northeast':
                    w += diffX; 
                    w = Math.min(Math.max(mw, w), mxw);
                    diffY = this.constrain(h, diffY, mh, mxh);
                    y += diffY;
                    h -= diffY;
                    break;
                case 'northwest':
                    diffX = this.constrain(w, diffX, mw, mxw);
                    diffY = this.constrain(h, diffY, mh, mxh);
                    y += diffY;
                    h -= diffY;
                    x += diffX;
                    w -= diffX;
                    break;
               case 'southwest':
                    diffX = this.constrain(w, diffX, mw, mxw);
                    h += diffY;
                    h = Math.min(Math.max(mh, h), mxh);
                    x += diffX;
                    w -= diffX;
                    break;
            }
            var sw = this.snap(w, wi, mw);
            var sh = this.snap(h, hi, mh);
            
            if(sw != w || sh != h){
                switch(pos){
                    case 'northeast':
                        y -= sh - h;
                    break;
                    case 'north':
                        y -= sh - h;
                        break;
                    case 'southwest':
                        x -= sw - w;
                    break;
                    case 'west':
                        x -= sw - w;
                        break;
                    case 'northwest':
                        x -= sw - w;
                        y -= sh - h;
                    break;
                }
                w = sw;
                h = sh;
            }
            
            if(this.preserveRatio){
                switch(pos){
                    case 'southeast':
                    case 'east':
                        h = oh * (w/ow);
                        h = Math.min(Math.max(mh, h), mxh);
                        w = ow * (h/oh);
                       break;
                    case 'south':
                        w = ow * (h/oh);
                        w = Math.min(Math.max(mw, w), mxw);
                        h = oh * (w/ow);
                        break;
                    case 'northeast':
                        w = ow * (h/oh);
                        w = Math.min(Math.max(mw, w), mxw);
                        h = oh * (w/ow);
                    break;
                    case 'north':
                        tw = w;
                        w = ow * (h/oh);
                        w = Math.min(Math.max(mw, w), mxw);
                        h = oh * (w/ow);
                        x += (tw - w) / 2;
                        break;
                    case 'southwest':
                        h = oh * (w/ow);
                        h = Math.min(Math.max(mh, h), mxh);
                        tw = w;
                        w = ow * (h/oh);
                        x += tw - w;
                        break;
                    case 'west':
                        th = h;
                        h = oh * (w/ow);
                        h = Math.min(Math.max(mh, h), mxh);
                        y += (th - h) / 2;
                        tw = w;
                        w = ow * (h/oh);
                        x += tw - w;
                       break;
                    case 'northwest':
                        tw = w;
                        th = h;
                        h = oh * (w/ow);
                        h = Math.min(Math.max(mh, h), mxh);
                        w = ow * (h/oh);
                        y += th - h;
                        x += tw - w;
                        break;
                        
                }
            }
            this.proxy.setBounds(x, y, w, h);
            if(this.dynamic){
                this.resizeElement(e);
            }
            }catch(ex){}
        }
    }
});