[roojs1] / Roo / dialog / UploadCropbox.js

/*
* Licence: LGPL
*/

/**
 * @class Roo.dialog.UploadCropbox
 * @extends Roo.BoxComponent
 * Dialog UploadCropbox class
 * @cfg {String} emptyText show when image has been loaded
 * @cfg {String} rotateNotify show when image too small to rotate
 * @cfg {Number} errorTimeout default 3000
 * @cfg {Number} minWidth default 300
 * @cfg {Number} minHeight default 300
 * @cfg {Number} outputMaxWidth default 1200
 * @cfg {Number} windowSize default 300
 * @cfg {Array} buttons default ['rotateLeft', 'pictureBtn', 'rotateRight']
 * @cfg {Boolean} isDocument (true|false) default false
 * @cfg {String} url action url
 * @cfg {String} paramName default 'imageUpload'
 * @cfg {String} method default POST
 * @cfg {Boolean} loadMask (true|false) default true
 * @cfg {Boolean} loadingText default 'Loading...'
 * 
 * @constructor
 * Create a new UploadCropbox
 * @param {Object} config The config object
 */

 Roo.dialog.UploadCropbox = function(config){
    Roo.dialog.UploadCropbox.superclass.constructor.call(this, config);
    
    this.addEvents({
        /**
         * @event beforeselectfile
         * Fire before select file
         * @param {Roo.dialog.UploadCropbox} this
         */
        "beforeselectfile" : true,
        /**
         * @event initial
         * Fire after initEvent
         * @param {Roo.dialog.UploadCropbox} this
         */
        "initial" : true,
        /**
         * @event crop
         * Fire after initEvent
         * @param {Roo.dialog.UploadCropbox} this
         * @param {String} data
         */
        "crop" : true,
        /**
         * @event prepare
         * Fire when preparing the file data
         * @param {Roo.dialog.UploadCropbox} this
         * @param {Object} file
         */
        "prepare" : true,
        /**
         * @event exception
         * Fire when get exception
         * @param {Roo.dialog.UploadCropbox} this
         * @param {XMLHttpRequest} xhr
         */
        "exception" : true,
        /**
         * @event beforeloadcanvas
         * Fire before load the canvas
         * @param {Roo.dialog.UploadCropbox} this
         * @param {String} src
         */
        "beforeloadcanvas" : true,
        /**
         * @event trash
         * Fire when trash image
         * @param {Roo.dialog.UploadCropbox} this
         */
        "trash" : true,
        /**
         * @event download
         * Fire when download the image
         * @param {Roo.dialog.UploadCropbox} this
         */
        "download" : true,
        /**
         * @event footerbuttonclick
         * Fire when footerbuttonclick
         * @param {Roo.dialog.UploadCropbox} this
         * @param {String} type
         */
        "footerbuttonclick" : true,
        /**
         * @event resize
         * Fire when resize
         * @param {Roo.dialog.UploadCropbox} this
         */
        "resize" : true,
        /**
         * @event rotate
         * Fire when rotate the image
         * @param {Roo.dialog.UploadCropbox} this
         * @param {String} pos
         */
        "rotate" : true,
        /**
         * @event inspect
         * Fire when inspect the file
         * @param {Roo.dialog.UploadCropbox} this
         * @param {Object} file
         */
        "inspect" : true,
        /**
         * @event upload
         * Fire when xhr upload the file
         * @param {Roo.dialog.UploadCropbox} this
         * @param {Object} data
         */
        "upload" : true,
        /**
         * @event arrange
         * Fire when arrange the file data
         * @param {Roo.dialog.UploadCropbox} this
         * @param {Object} formData
         */
        "arrange" : true,
        /**
         * @event loadcanvas
         * Fire after load the canvas
         * @param {Roo.dialog.UploadCropbox}
         * @param {Object} imgEl
         */
        "loadcanvas" : true
    });
    
    this.buttons = this.buttons || Roo.dialog.UploadCropbox.footer.STANDARD;
};

Roo.extend(Roo.dialog.UploadCropbox, Roo.Component,  {
    
    emptyText : 'Click to upload image',
    rotateNotify : 'Image is too small to rotate',
    errorTimeout : 3000,
    scale : 0,
    baseScale : 1,
    rotate : 0,
    dragable : false,
    pinching : false,
    mouseX : 0,
    mouseY : 0,
    cropData : false,
    minWidth : 300,
    minHeight : 300,
    outputMaxWidth : 1200,
    windowSize : 300,
    file : false,
    exif : {},
    baseRotate : 1,
    cropType : 'image/jpeg',
    buttons : false,
    canvasLoaded : false,
    isDocument : false,
    method : 'POST',
    paramName : 'imageUpload',
    loadMask : true,
    loadingText : 'Loading...',
    maskEl : false,
    
    getAutoCreate : function()
    {
        var cfg = {
            tag : 'div',
            cls : 'roo-upload-cropbox',
            cn : [
                {
                    tag : 'input',
                    cls : 'roo-upload-cropbox-selector',
                    type : 'file'
                },
                {
                    tag : 'div',
                    cls : 'roo-upload-cropbox-body',
                    style : 'cursor:pointer',
                    cn : [
                        {
                            tag : 'div',
                            cls : 'roo-upload-cropbox-preview'
                        },
                        {
                            tag : 'div',
                            cls : 'roo-upload-cropbox-thumb'
                        },
                        {
                            tag : 'div',
                            cls : 'roo-upload-cropbox-empty-notify',
                            html : this.emptyText
                        },
                        {
                            tag : 'div',
                            cls : 'roo-upload-cropbox-error-notify alert alert-danger',
                            html : this.rotateNotify
                        }
                    ]
                },
                {
                    tag : 'div',
                    cls : 'roo-upload-cropbox-footer',
                    cn : {
                        tag : 'div',
                        cls : 'btn-group btn-group-justified roo-upload-cropbox-btn-group',
                        cn : []
                    }
                }
            ]
        };
        
        return cfg;
    },
    
    onRender : function(ct, position)
    {
        Roo.dialog.UploadCropbox.superclass.onRender.call(this, ct, position);

        if(this.el){
            if (this.el.attr('xtype')) {
                this.el.attr('xtypex', this.el.attr('xtype'));
                this.el.dom.removeAttribute('xtype');
                
                this.initEvents();
            }
        }
        else {
            var cfg = Roo.apply({},  this.getAutoCreate());
        
            cfg.id = this.id || Roo.id();
            
            if (this.cls) {
                cfg.cls = (typeof(cfg.cls) == 'undefined' ? this.cls : cfg.cls) + ' ' + this.cls;
            }
            
            if (this.style) { // fixme needs to support more complex style data.
                cfg.style = (typeof(cfg.style) == 'undefined' ? this.style : cfg.style) + '; ' + this.style;
            }
            
            this.el = ct.createChild(cfg, position);
            
            this.initEvents();
        }
        
        if (this.buttons.length) {
            
            Roo.each(this.buttons, function(bb) {
                
                var btn = this.el.select('.roo-upload-cropbox-footer div.roo-upload-cropbox-btn-group').first().createChild(bb);
                
                btn.on('click', this.onFooterButtonClick.createDelegate(this, [bb.action], true));
                
            }, this);
        }
        
        if(this.loadMask){
            this.maskEl = this.el;
        }
    },
    
    initEvents : function()
    {
        this.urlAPI = (window.createObjectURL && window) || 
                                (window.URL && URL.revokeObjectURL && URL) || 
                                (window.webkitURL && webkitURL);
                        
        this.bodyEl = this.el.select('.roo-upload-cropbox-body', true).first();
        this.bodyEl.setVisibilityMode(Roo.Element.DISPLAY).originalDisplay = 'block';
        
        this.selectorEl = this.el.select('.roo-upload-cropbox-selector', true).first();
        this.selectorEl.hide();
        
        this.previewEl = this.el.select('.roo-upload-cropbox-preview', true).first();
        this.previewEl.setVisibilityMode(Roo.Element.DISPLAY).originalDisplay = 'block';
        
        this.thumbEl = this.el.select('.roo-upload-cropbox-thumb', true).first();
        this.thumbEl.setVisibilityMode(Roo.Element.DISPLAY).originalDisplay = 'block';
        this.thumbEl.hide();
        
        this.notifyEl = this.el.select('.roo-upload-cropbox-empty-notify', true).first();
        this.notifyEl.setVisibilityMode(Roo.Element.DISPLAY).originalDisplay = 'block';
        
        this.errorEl = this.el.select('.roo-upload-cropbox-error-notify', true).first();
        this.errorEl.setVisibilityMode(Roo.Element.DISPLAY).originalDisplay = 'block';
        this.errorEl.hide();
        
        this.footerEl = this.el.select('.roo-upload-cropbox-footer', true).first();
        this.footerEl.setVisibilityMode(Roo.Element.DISPLAY).originalDisplay = 'block';
        this.footerEl.hide();
        
        this.setThumbBoxSize();
        
        this.bind();
        
        this.resize();
        
        this.fireEvent('initial', this);
    },

    bind : function()
    {
        var _this = this;
        
        window.addEventListener("resize", function() { _this.resize(); } );
        
        this.bodyEl.on('click', this.beforeSelectFile, this);
        
        if(Roo.isTouch){
            this.bodyEl.on('touchstart', this.onTouchStart, this);
            this.bodyEl.on('touchmove', this.onTouchMove, this);
            this.bodyEl.on('touchend', this.onTouchEnd, this);
        }
        
        if(!Roo.isTouch){
            this.bodyEl.on('mousedown', this.onMouseDown, this);
            this.bodyEl.on('mousemove', this.onMouseMove, this);
            var mousewheel = (/Firefox/i.test(navigator.userAgent))? 'DOMMouseScroll' : 'mousewheel';
            this.bodyEl.on(mousewheel, this.onMouseWheel, this);
            Roo.get(document).on('mouseup', this.onMouseUp, this);
        }
        
        this.selectorEl.on('change', this.onFileSelected, this);
    },
    
    reset : function()
    {    
        this.scale = 0;
        this.baseScale = 1;
        this.rotate = 0;
        this.baseRotate = 1;
        this.dragable = false;
        this.pinching = false;
        this.mouseX = 0;
        this.mouseY = 0;
        this.cropData = false;
        this.notifyEl.dom.innerHTML = this.emptyText;
        
        // this.selectorEl.dom.value = '';
        
    },
    
    resize : function()
    {
        if(this.fireEvent('resize', this) != false){
            this.setThumbBoxPosition();
            this.setCanvasPosition();
        }
    },
    
    onFooterButtonClick : function(e, el, o, type)
    {
        switch (type) {
            case 'rotate-left' :
                this.onRotateLeft(e);
                break;
            case 'rotate-right' :
                this.onRotateRight(e);
                break;
            case 'picture' :
                this.beforeSelectFile(e);
                break;
            case 'trash' :
                this.trash(e);
                break;
            case 'crop' :
                this.crop(e);
                break;
            case 'download' :
                this.download(e);
                break;
            case 'center' :
                this.center(e);
                break;
            default :
                break;
        }
        
        this.fireEvent('footerbuttonclick', this, type);
    },
    
    beforeSelectFile : function(e)
    {
        e.preventDefault();
        
        if(this.fireEvent('beforeselectfile', this) != false){
            this.selectorEl.dom.click();
        }
    },
    
    onFileSelected : function(e)
    {
        e.preventDefault();
        
        if(typeof(this.selectorEl.dom.files) == 'undefined' || !this.selectorEl.dom.files.length){
            return;
        }
        
        var file = this.selectorEl.dom.files[0];
        
        if(this.fireEvent('inspect', this, file) != false){
            this.prepare(file);
        }
        
    },
    
    trash : function(e)
    {
        this.fireEvent('trash', this);
    },
    
    download : function(e)
    {
        this.fireEvent('download', this);
    },

    center : function(e)
    {
        this.setCanvasPosition();
    },
    
    loadCanvas : function(src)
    {   
        if(this.fireEvent('beforeloadcanvas', this, src) != false){
            
            this.reset();
            
            this.imageEl = document.createElement('img');
            
            var _this = this;
            
            this.imageEl.addEventListener("load", function(){ _this.onLoadCanvas(); });
            
            // this.imageEl.src = src;
            this.imageEl.src = 'http://localhost/web.MediaOutreach/press.local.php/Images/Download/162632/2000x1000.png';
        }
    },
    
    onLoadCanvas : function()
    {   
        this.imageEl.OriginWidth = this.imageEl.naturalWidth || this.imageEl.width;
        this.imageEl.OriginHeight = this.imageEl.naturalHeight || this.imageEl.height;

        if(this.fireEvent('loadcanvas', this, this.imageEl) != false){
        
            this.bodyEl.un('click', this.beforeSelectFile, this);
            
            this.notifyEl.hide();
            this.thumbEl.show();
            this.footerEl.show();
            
            this.baseRotateLevel();
            
            if(this.isDocument){
                this.setThumbBoxSize();
            }
            
            this.setThumbBoxPosition();
            
            this.baseScaleLevel();
            
            this.draw();
            
            this.resize();
            
            this.canvasLoaded = true;
        
        }
        
        if(this.loadMask){
            this.maskEl.unmask();
        }
        
    },
    
    setCanvasPosition : function(center = true)
    {   
        if(!this.canvasEl){
            return;
        }

        var newCenterLeft = Math.ceil((this.bodyEl.getWidth() - this.canvasEl.width) / 2);
        var newCenterTop = Math.ceil((this.bodyEl.getHeight() - this.canvasEl.height) / 2);

        if(center) {
            this.previewEl.setLeft(newCenterLeft);
            this.previewEl.setTop(newCenterTop);

            return;
        }
        
        var oldScaleLevel = this.baseScale * Math.pow(1.02, this.startScale);
        var oldCanvasWidth = Math.floor(this.imageEl.OriginWidth * oldScaleLevel);
        var oldCanvasHeight = Math.floor(this.imageEl.OriginHeight * oldScaleLevel);

        var oldCenterLeft = Math.ceil((this.bodyEl.getWidth() - oldCanvasWidth) / 2);
        var oldCenterTop = Math.ceil((this.bodyEl.getHeight() - oldCanvasHeight) / 2);

        var leftDiff = newCenterLeft - oldCenterLeft;
        var topDiff = newCenterTop - oldCenterTop;

        var newPreviewLeft = this.previewEl.getLeft(true) + leftDiff;
        var newPreviewTop = this.previewEl.getTop(true) + topDiff;

        this.previewEl.setLeft(newPreviewLeft);
        this.previewEl.setTop(newPreviewTop);
        
    },
    
    onMouseDown : function(e)
    {   
        e.stopEvent();
        
        this.dragable = true;
        this.pinching = false;
        
        if(this.isDocument && (this.canvasEl.width < this.thumbEl.getWidth() || this.canvasEl.height < this.thumbEl.getHeight())){
            this.dragable = false;
            return;
        }
        
        this.mouseX = Roo.isTouch ? e.browserEvent.touches[0].pageX : e.getPageX();
        this.mouseY = Roo.isTouch ? e.browserEvent.touches[0].pageY : e.getPageY();
        
    },
    
    onMouseMove : function(e)
    {   
        e.stopEvent();
        
        if(!this.canvasLoaded){
            return;
        }
        
        if (!this.dragable){
            return;
        }

        var maxPaddingLeft = this.canvasEl.width / 0.9 * 0.05;
        var maxPaddingTop = maxPaddingLeft * this.minHeight / this.minWidth;

        if ((this.imageEl.OriginWidth / this.imageEl.OriginHeight <= this.minWidth / this.minHeight)) {
            maxPaddingLeft = (this.canvasEl.height * this.minWidth / this.minHeight - this.canvasEl.width) / 2 + maxPaddingLeft;
        }

        if ((this.imageEl.OriginWidth / this.imageEl.OriginHeight >= this.minWidth / this.minHeight)) {
            maxPaddingTop = (this.canvasEl.width * this.minHeight / this.minWidth - this.canvasEl.height) / 2 + maxPaddingTop;
        }
        
        var minX = Math.ceil(this.thumbEl.getLeft(true) + this.thumbEl.getWidth() - this.canvasEl.width - maxPaddingLeft);
        var minY = Math.ceil(this.thumbEl.getTop(true) + this.thumbEl.getHeight() - this.canvasEl.height - maxPaddingTop);
        
        var maxX = Math.ceil(this.thumbEl.getLeft(true) + maxPaddingLeft);
        var maxY = Math.ceil(this.thumbEl.getTop(true) +  maxPaddingTop);

        if(minX > maxX) {
            var tempX = minX;
            minX = maxX;
            maxX = tempX;
        }

        if(minY > maxY) {
            var tempY = minY;
            minY = maxY;
            maxY = tempY;
        }

        var x = Roo.isTouch ? e.browserEvent.touches[0].pageX : e.getPageX();
        var y = Roo.isTouch ? e.browserEvent.touches[0].pageY : e.getPageY();
        
        x = x - this.mouseX;
        y = y - this.mouseY;

        var bgX = Math.ceil(x + this.previewEl.getLeft(true));
        var bgY = Math.ceil(y + this.previewEl.getTop(true));
        
        bgX = (bgX < minX) ? minX : ((bgX > maxX) ? maxX : bgX);
        bgY = (bgY < minY) ? minY : ((bgY > maxY) ? maxY : bgY);
        
        this.previewEl.setLeft(bgX);
        this.previewEl.setTop(bgY);
        
        this.mouseX = Roo.isTouch ? e.browserEvent.touches[0].pageX : e.getPageX();
        this.mouseY = Roo.isTouch ? e.browserEvent.touches[0].pageY : e.getPageY();
    },
    
    onMouseUp : function(e)
    {   
        e.stopEvent();
        
        this.dragable = false;
    },
    
    onMouseWheel : function(e)
    {   
        e.stopEvent();
        
        this.startScale = this.scale;
        this.scale = (e.getWheelDelta() > 0) ? (this.scale + 1) : (this.scale - 1);
        
        if(!this.zoomable()){
            this.scale = this.startScale;
            return;
        }

        
        this.draw();
        
        return;
    },
    
    zoomable : function()
    {
        var minScale = this.thumbEl.getWidth() / this.minWidth;
        
        if(this.minWidth < this.minHeight){
            minScale = this.thumbEl.getHeight() / this.minHeight;
        }
        
        var width = Math.ceil(this.imageEl.OriginWidth * this.getScaleLevel() / minScale);
        var height = Math.ceil(this.imageEl.OriginHeight * this.getScaleLevel() / minScale);
 
        var maxWidth = this.imageEl.OriginWidth;
        var maxHeight = this.imageEl.OriginHeight;


        var newCanvasWidth = Math.floor(this.imageEl.OriginWidth * this.getScaleLevel());
        var newCanvasHeight = Math.floor(this.imageEl.OriginHeight * this.getScaleLevel());

        var oldCenterLeft = Math.ceil((this.bodyEl.getWidth() - this.canvasEl.width) / 2);
        var oldCenterTop = Math.ceil((this.bodyEl.getHeight() - this.canvasEl.height) / 2);

        var newCenterLeft = Math.ceil((this.bodyEl.getWidth() - newCanvasWidth) / 2);
        var newCenterTop = Math.ceil((this.bodyEl.getHeight() - newCanvasHeight) / 2);

        var leftDiff = newCenterLeft - oldCenterLeft;
        var topDiff = newCenterTop - oldCenterTop;

        var newPreviewLeft = this.previewEl.getLeft(true) + leftDiff;
        var newPreviewTop = this.previewEl.getTop(true) + topDiff;

        var paddingLeft = newPreviewLeft - this.thumbEl.getLeft(true);
        var paddingTop = newPreviewTop - this.thumbEl.getTop(true);

        var paddingRight = this.thumbEl.getLeft(true) + this.thumbEl.getWidth() - newCanvasWidth - newPreviewLeft;
        var paddingBottom = this.thumbEl.getTop(true) + this.thumbEl.getHeight() - newCanvasHeight - newPreviewTop;

        var maxPaddingLeft = newCanvasWidth / 0.9 * 0.05;
        var maxPaddingTop = maxPaddingLeft * this.minHeight / this.minWidth;

        if ((this.imageEl.OriginWidth / this.imageEl.OriginHeight <= this.minWidth / this.minHeight)) {
            maxPaddingLeft = (newCanvasHeight * this.minWidth / this.minHeight - newCanvasWidth) / 2 + maxPaddingLeft;
        }

        if ((this.imageEl.OriginWidth / this.imageEl.OriginHeight >= this.minWidth / this.minHeight)) {
            maxPaddingTop = (newCanvasWidth * this.minHeight / this.minWidth - newCanvasHeight) / 2 + maxPaddingTop;
        }
        
        if(
                this.isDocument &&
                (this.rotate == 0 || this.rotate == 180) && 
                (
                    width > this.imageEl.OriginWidth || 
                    height > this.imageEl.OriginHeight ||
                    (width < this.minWidth && height < this.minHeight)
                )
        ){
            return false;
        }
        
        if(
                this.isDocument &&
                (this.rotate == 90 || this.rotate == 270) && 
                (
                    width > this.imageEl.OriginWidth || 
                    height > this.imageEl.OriginHeight ||
                    (width < this.minHeight && height < this.minWidth)
                )
        ){
            return false;
        }
        
        if(
                !this.isDocument &&
                (this.rotate == 0 || this.rotate == 180) && 
                (
                    // for zoom out
                    paddingLeft > maxPaddingLeft ||
                    paddingRight > maxPaddingLeft ||
                    paddingTop > maxPaddingTop ||
                    paddingBottom > maxPaddingTop ||
                    // for zoom in
                    width > maxWidth ||
                    height > maxHeight
                )
        ){
            return false;
        }
        
        if(
                !this.isDocument &&
                (this.rotate == 90 || this.rotate == 270) && 
                (
                    width < this.minHeight || 
                    width > this.imageEl.OriginWidth || 
                    height < this.minWidth || 
                    height > this.imageEl.OriginHeight
                )
        ){
            return false;
        }
        
        return true;
        
    },
    
    onRotateLeft : function(e)
    {   
        if(!this.isDocument && (this.canvasEl.height < this.thumbEl.getWidth() || this.canvasEl.width < this.thumbEl.getHeight())){
            
            var minScale = this.thumbEl.getWidth() / this.minWidth;
            
            var bw = Math.ceil(this.canvasEl.width / this.getScaleLevel());
            var bh = Math.ceil(this.canvasEl.height / this.getScaleLevel());
            
            this.startScale = this.scale;
            
            while (this.getScaleLevel() < minScale){
            
                this.scale = this.scale + 1;
                
                if(!this.zoomable()){
                    break;
                }
                
                if(
                        Math.ceil(bw * this.getScaleLevel()) < this.thumbEl.getHeight() ||
                        Math.ceil(bh * this.getScaleLevel()) < this.thumbEl.getWidth()
                ){
                    continue;
                }
                
                this.rotate = (this.rotate < 90) ? 270 : this.rotate - 90;

                this.draw();
                
                return;
            }
            
            this.scale = this.startScale;
            
            this.onRotateFail();
            
            return false;
        }
        
        this.rotate = (this.rotate < 90) ? 270 : this.rotate - 90;

        if(this.isDocument){
            this.setThumbBoxSize();
            this.setThumbBoxPosition();
            this.setCanvasPosition();
        }
        
        this.draw();
        
        this.fireEvent('rotate', this, 'left');
        
    },
    
    onRotateRight : function(e)
    {
        if(!this.isDocument && (this.canvasEl.height < this.thumbEl.getWidth() || this.canvasEl.width < this.thumbEl.getHeight())){
            
            var minScale = this.thumbEl.getWidth() / this.minWidth;
        
            var bw = Math.ceil(this.canvasEl.width / this.getScaleLevel());
            var bh = Math.ceil(this.canvasEl.height / this.getScaleLevel());
            
            this.startScale = this.scale;
            
            while (this.getScaleLevel() < minScale){
            
                this.scale = this.scale + 1;
                
                if(!this.zoomable()){
                    break;
                }
                
                if(
                        Math.ceil(bw * this.getScaleLevel()) < this.thumbEl.getHeight() ||
                        Math.ceil(bh * this.getScaleLevel()) < this.thumbEl.getWidth()
                ){
                    continue;
                }
                
                this.rotate = (this.rotate > 180) ? 0 : this.rotate + 90;

                this.draw();
                
                return;
            }
            
            this.scale = this.startScale;
            
            this.onRotateFail();
            
            return false;
        }
        
        this.rotate = (this.rotate > 180) ? 0 : this.rotate + 90;

        if(this.isDocument){
            this.setThumbBoxSize();
            this.setThumbBoxPosition();
            this.setCanvasPosition();
        }
        
        this.draw();
        
        this.fireEvent('rotate', this, 'right');
    },
    
    onRotateFail : function()
    {
        this.errorEl.show(true);
        
        var _this = this;
        
        (function() { _this.errorEl.hide(true); }).defer(this.errorTimeout);
    },
    
    draw : function()
    {
        this.previewEl.dom.innerHTML = '';
        
        var canvasEl = document.createElement("canvas");
        
        var contextEl = canvasEl.getContext("2d");
        
        canvasEl.width = this.imageEl.OriginWidth * this.getScaleLevel();
        canvasEl.height = this.imageEl.OriginWidth * this.getScaleLevel();
        var center = this.imageEl.OriginWidth / 2;
        
        if(this.imageEl.OriginWidth < this.imageEl.OriginHeight){
            canvasEl.width = this.imageEl.OriginHeight * this.getScaleLevel();
            canvasEl.height = this.imageEl.OriginHeight * this.getScaleLevel();
            center = this.imageEl.OriginHeight / 2;
        }
        
        contextEl.scale(this.getScaleLevel(), this.getScaleLevel());
        
        contextEl.translate(center, center);
        contextEl.rotate(this.rotate * Math.PI / 180);

        contextEl.drawImage(this.imageEl, 0, 0, this.imageEl.OriginWidth, this.imageEl.OriginHeight, center * -1, center * -1, this.imageEl.OriginWidth, this.imageEl.OriginHeight);
        
        this.canvasEl = document.createElement("canvas");
        
        this.contextEl = this.canvasEl.getContext("2d");
        
        switch (this.rotate) {
            case 0 :
                
                this.canvasEl.width = this.imageEl.OriginWidth * this.getScaleLevel();
                this.canvasEl.height = this.imageEl.OriginHeight * this.getScaleLevel();
                
                this.contextEl.drawImage(canvasEl, 0, 0, this.canvasEl.width, this.canvasEl.height, 0, 0, this.canvasEl.width, this.canvasEl.height);
                
                break;
            case 90 : 
                
                this.canvasEl.width = this.imageEl.OriginHeight * this.getScaleLevel();
                this.canvasEl.height = this.imageEl.OriginWidth * this.getScaleLevel();
                
                if(this.imageEl.OriginWidth > this.imageEl.OriginHeight){
                    this.contextEl.drawImage(canvasEl, Math.abs(this.canvasEl.width - this.canvasEl.height), 0, this.canvasEl.width, this.canvasEl.height, 0, 0, this.canvasEl.width, this.canvasEl.height);
                    break;
                }
                
                this.contextEl.drawImage(canvasEl, 0, 0, this.canvasEl.width, this.canvasEl.height, 0, 0, this.canvasEl.width, this.canvasEl.height);
                
                break;
            case 180 :
                
                this.canvasEl.width = this.imageEl.OriginWidth * this.getScaleLevel();
                this.canvasEl.height = this.imageEl.OriginHeight * this.getScaleLevel();
                
                if(this.imageEl.OriginWidth > this.imageEl.OriginHeight){
                    this.contextEl.drawImage(canvasEl, 0, Math.abs(this.canvasEl.width - this.canvasEl.height), this.canvasEl.width, this.canvasEl.height, 0, 0, this.canvasEl.width, this.canvasEl.height);
                    break;
                }
                
                this.contextEl.drawImage(canvasEl, Math.abs(this.canvasEl.width - this.canvasEl.height), 0, this.canvasEl.width, this.canvasEl.height, 0, 0, this.canvasEl.width, this.canvasEl.height);
                
                break;
            case 270 :
                
                this.canvasEl.width = this.imageEl.OriginHeight * this.getScaleLevel();
                this.canvasEl.height = this.imageEl.OriginWidth * this.getScaleLevel();
        
                if(this.imageEl.OriginWidth > this.imageEl.OriginHeight){
                    this.contextEl.drawImage(canvasEl, 0, 0, this.canvasEl.width, this.canvasEl.height, 0, 0, this.canvasEl.width, this.canvasEl.height);
                    break;
                }
                
                this.contextEl.drawImage(canvasEl, 0, Math.abs(this.canvasEl.width - this.canvasEl.height), this.canvasEl.width, this.canvasEl.height, 0, 0, this.canvasEl.width, this.canvasEl.height);
                
                break;
            default : 
                break;
        }
        
        this.previewEl.appendChild(this.canvasEl);
        
        this.setCanvasPosition(false);
    },
    
    crop : function()
    {
        if(!this.canvasLoaded){
            return;
        }
        
        var imageCanvas = document.createElement("canvas");
        
        var imageContext = imageCanvas.getContext("2d");
        
        imageCanvas.width = (this.imageEl.OriginWidth > this.imageEl.OriginHeight) ? this.imageEl.OriginWidth : this.imageEl.OriginHeight;
        imageCanvas.height = (this.imageEl.OriginWidth > this.imageEl.OriginHeight) ? this.imageEl.OriginWidth : this.imageEl.OriginHeight;
        
        var center = imageCanvas.width / 2;
        
        imageContext.translate(center, center);
        
        imageContext.rotate(this.rotate * Math.PI / 180);
        
        imageContext.drawImage(this.imageEl, 0, 0, this.imageEl.OriginWidth, this.imageEl.OriginHeight, center * -1, center * -1, this.imageEl.OriginWidth, this.imageEl.OriginHeight);
        
        var canvas = document.createElement("canvas");
        
        var context = canvas.getContext("2d");

        canvas.width = this.thumbEl.getWidth() / this.getScaleLevel();
        
        canvas.height = this.thumbEl.getHeight() / this.getScaleLevel();

        switch (this.rotate) {
            case 0 :
                
                var width = (this.thumbEl.getWidth() / this.getScaleLevel() > this.imageEl.OriginWidth) ? this.imageEl.OriginWidth : (this.thumbEl.getWidth() / this.getScaleLevel());
                var height = (this.thumbEl.getHeight() / this.getScaleLevel() > this.imageEl.OriginHeight) ? this.imageEl.OriginHeight : (this.thumbEl.getHeight() / this.getScaleLevel());
                
                var x = (this.thumbEl.getLeft(true) > this.previewEl.getLeft(true)) ? 0 : ((this.previewEl.getLeft(true) - this.thumbEl.getLeft(true)) / this.getScaleLevel());
                var y = (this.thumbEl.getTop(true) > this.previewEl.getTop(true)) ? 0 : ((this.previewEl.getTop(true) - this.thumbEl.getTop(true)) / this.getScaleLevel());
                
                var sx = this.thumbEl.getLeft(true) - this.previewEl.getLeft(true);
                var sy = this.thumbEl.getTop(true) - this.previewEl.getTop(true);

                sx = sx < 0 ? 0 : (sx / this.getScaleLevel());
                sy = sy < 0 ? 0 : (sy / this.getScaleLevel());

                if(canvas.width > this.outputMaxWidth) {
                    var scale = this.outputMaxWidth / canvas.width;
                    canvas.width = canvas.width * scale;
                    canvas.height = canvas.height * scale;
                    context.scale(scale, scale);
                }

                context.fillStyle = 'white';
                context.fillRect(0, 0, this.thumbEl.getWidth() / this.getScaleLevel(), this.thumbEl.getHeight() / this.getScaleLevel());


                context.drawImage(imageCanvas, sx, sy, width, height, x, y, width, height);
                
                break;
            case 90 : 
                
                var width = (this.thumbEl.getWidth() / this.getScaleLevel() > this.imageEl.OriginHeight) ? this.imageEl.OriginHeight : (this.thumbEl.getWidth() / this.getScaleLevel());
                var height = (this.thumbEl.getHeight() / this.getScaleLevel() > this.imageEl.OriginWidth) ? this.imageEl.OriginWidth : (this.thumbEl.getHeight() / this.getScaleLevel());
                
                var x = (this.thumbEl.getLeft(true) > this.previewEl.getLeft(true)) ? 0 : ((this.previewEl.getLeft(true) - this.thumbEl.getLeft(true)) / this.getScaleLevel());
                var y = (this.thumbEl.getTop(true) > this.previewEl.getTop(true)) ? 0 : ((this.previewEl.getTop(true) - this.thumbEl.getTop(true)) / this.getScaleLevel());
                
                var targetWidth = this.minWidth - 2 * x;
                var targetHeight = this.minHeight - 2 * y;
                
                var scale = 1;
                
                if((x == 0 && y == 0) || (x == 0 && y > 0)){
                    scale = targetWidth / width;
                }
                
                if(x > 0 && y == 0){
                    scale = targetHeight / height;
                }
                
                if(x > 0 && y > 0){
                    scale = targetWidth / width;
                    
                    if(width < height){
                        scale = targetHeight / height;
                    }
                }
                
                context.scale(scale, scale);
                
                var sx = Math.min(this.canvasEl.width - this.thumbEl.getWidth(), this.thumbEl.getLeft(true) - this.previewEl.getLeft(true));
                var sy = Math.min(this.canvasEl.height - this.thumbEl.getHeight(), this.thumbEl.getTop(true) - this.previewEl.getTop(true));

                sx = sx < 0 ? 0 : (sx / this.getScaleLevel());
                sy = sy < 0 ? 0 : (sy / this.getScaleLevel());
                
                sx += (this.imageEl.OriginWidth > this.imageEl.OriginHeight) ? Math.abs(this.imageEl.OriginWidth - this.imageEl.OriginHeight) : 0;
                
                context.drawImage(imageCanvas, sx, sy, width, height, x, y, width, height);
                
                break;
            case 180 :
                
                var width = (this.thumbEl.getWidth() / this.getScaleLevel() > this.imageEl.OriginWidth) ? this.imageEl.OriginWidth : (this.thumbEl.getWidth() / this.getScaleLevel());
                var height = (this.thumbEl.getHeight() / this.getScaleLevel() > this.imageEl.OriginHeight) ? this.imageEl.OriginHeight : (this.thumbEl.getHeight() / this.getScaleLevel());
                
                var x = (this.thumbEl.getLeft(true) > this.previewEl.getLeft(true)) ? 0 : ((this.previewEl.getLeft(true) - this.thumbEl.getLeft(true)) / this.getScaleLevel());
                var y = (this.thumbEl.getTop(true) > this.previewEl.getTop(true)) ? 0 : ((this.previewEl.getTop(true) - this.thumbEl.getTop(true)) / this.getScaleLevel());
                
                var targetWidth = this.minWidth - 2 * x;
                var targetHeight = this.minHeight - 2 * y;
                
                var scale = 1;
                
                if((x == 0 && y == 0) || (x == 0 && y > 0)){
                    scale = targetWidth / width;
                }
                
                if(x > 0 && y == 0){
                    scale = targetHeight / height;
                }
                
                if(x > 0 && y > 0){
                    scale = targetWidth / width;
                    
                    if(width < height){
                        scale = targetHeight / height;
                    }
                }
                
                context.scale(scale, scale);
                
                var sx = Math.min(this.canvasEl.width - this.thumbEl.getWidth(), this.thumbEl.getLeft(true) - this.previewEl.getLeft(true));
                var sy = Math.min(this.canvasEl.height - this.thumbEl.getHeight(), this.thumbEl.getTop(true) - this.previewEl.getTop(true));

                sx = sx < 0 ? 0 : (sx / this.getScaleLevel());
                sy = sy < 0 ? 0 : (sy / this.getScaleLevel());

                sx += (this.imageEl.OriginWidth > this.imageEl.OriginHeight) ? 0 : Math.abs(this.imageEl.OriginWidth - this.imageEl.OriginHeight);
                sy += (this.imageEl.OriginWidth > this.imageEl.OriginHeight) ? Math.abs(this.imageEl.OriginWidth - this.imageEl.OriginHeight) : 0;
                
                context.drawImage(imageCanvas, sx, sy, width, height, x, y, width, height);
                
                break;
            case 270 :
                
                var width = (this.thumbEl.getWidth() / this.getScaleLevel() > this.imageEl.OriginHeight) ? this.imageEl.OriginHeight : (this.thumbEl.getWidth() / this.getScaleLevel());
                var height = (this.thumbEl.getHeight() / this.getScaleLevel() > this.imageEl.OriginWidth) ? this.imageEl.OriginWidth : (this.thumbEl.getHeight() / this.getScaleLevel());
                
                var x = (this.thumbEl.getLeft(true) > this.previewEl.getLeft(true)) ? 0 : ((this.previewEl.getLeft(true) - this.thumbEl.getLeft(true)) / this.getScaleLevel());
                var y = (this.thumbEl.getTop(true) > this.previewEl.getTop(true)) ? 0 : ((this.previewEl.getTop(true) - this.thumbEl.getTop(true)) / this.getScaleLevel());
                
                var targetWidth = this.minWidth - 2 * x;
                var targetHeight = this.minHeight - 2 * y;
                
                var scale = 1;
                
                if((x == 0 && y == 0) || (x == 0 && y > 0)){
                    scale = targetWidth / width;
                }
                
                if(x > 0 && y == 0){
                    scale = targetHeight / height;
                }
                
                if(x > 0 && y > 0){
                    scale = targetWidth / width;
                    
                    if(width < height){
                        scale = targetHeight / height;
                    }
                }
                
                context.scale(scale, scale);
                var sx = Math.min(this.canvasEl.width - this.thumbEl.getWidth(), this.thumbEl.getLeft(true) - this.previewEl.getLeft(true));
                var sy = Math.min(this.canvasEl.height - this.thumbEl.getHeight(), this.thumbEl.getTop(true) - this.previewEl.getTop(true));

                sx = sx < 0 ? 0 : (sx / this.getScaleLevel());
                sy = sy < 0 ? 0 : (sy / this.getScaleLevel());
                
                sy += (this.imageEl.OriginWidth > this.imageEl.OriginHeight) ? 0 : Math.abs(this.imageEl.OriginWidth - this.imageEl.OriginHeight);
                
                context.drawImage(imageCanvas, sx, sy, width, height, x, y, width, height);
                
                break;
            default : 
                break;
        }
        
        this.cropData = canvas.toDataURL(this.cropType);
        
        if(this.fireEvent('crop', this, this.cropData) !== false){
            this.process(this.file, this.cropData);
        }
        
        return;
        
    },
    
    setThumbBoxSize : function()
    {
        var width, height;
        
        if(this.isDocument && typeof(this.imageEl) != 'undefined'){
            width = (this.imageEl.OriginWidth > this.imageEl.OriginHeight) ? Math.max(this.minWidth, this.minHeight) : Math.min(this.minWidth, this.minHeight);
            height = (this.imageEl.OriginWidth > this.imageEl.OriginHeight) ? Math.min(this.minWidth, this.minHeight) : Math.max(this.minWidth, this.minHeight);
            
            this.minWidth = width;
            this.minHeight = height;
            
            if(this.rotate == 90 || this.rotate == 270){
                this.minWidth = height;
                this.minHeight = width;
            }
        }
        
        height = this.windowSize;
        width = Math.ceil(this.minWidth * height / this.minHeight);
        
        if(this.minWidth > this.minHeight){
            width = this.windowSize;
            height = Math.ceil(this.minHeight * width / this.minWidth);
        }
        
        this.thumbEl.setStyle({
            width : width + 'px',
            height : height + 'px'
        });

        return;
            
    },
    
    setThumbBoxPosition : function()
    {
        var x = Math.ceil((this.bodyEl.getWidth() - this.thumbEl.getWidth()) / 2 );
        var y = Math.ceil((this.bodyEl.getHeight() - this.thumbEl.getHeight()) / 2);
        
        this.thumbEl.setLeft(x);
        this.thumbEl.setTop(y);
        
    },
    
    baseRotateLevel : function()
    {
        this.baseRotate = 1;
        
        if(
                typeof(this.exif) != 'undefined' &&
                typeof(this.exif[Roo.dialog.UploadCropbox['tags']['Orientation']]) != 'undefined' &&
                [1, 3, 6, 8].indexOf(this.exif[Roo.dialog.UploadCropbox['tags']['Orientation']]) != -1
        ){
            this.baseRotate = this.exif[Roo.dialog.UploadCropbox['tags']['Orientation']];
        }
        
        this.rotate = Roo.dialog.UploadCropbox['Orientation'][this.baseRotate];
        
    },
    
    baseScaleLevel : function()
    {
        var width, height;
        
        if(this.isDocument){
            
            if(this.baseRotate == 6 || this.baseRotate == 8){
            
                height = this.thumbEl.getHeight();
                this.baseScale = height / this.imageEl.OriginWidth;

                if(this.imageEl.OriginHeight * this.baseScale > this.thumbEl.getWidth()){
                    width = this.thumbEl.getWidth();
                    this.baseScale = width / this.imageEl.OriginHeight;
                }

                return;
            }

            height = this.thumbEl.getHeight();
            this.baseScale = height / this.imageEl.OriginHeight;

            if(this.imageEl.OriginWidth * this.baseScale > this.thumbEl.getWidth()){
                width = this.thumbEl.getWidth();
                this.baseScale = width / this.imageEl.OriginWidth;
            }

            return;
        }
        
        if(this.baseRotate == 6 || this.baseRotate == 8){
            
            width = this.thumbEl.getHeight();
            this.baseScale = width / this.imageEl.OriginHeight;
            
            if(this.imageEl.OriginHeight * this.baseScale < this.thumbEl.getWidth()){
                height = this.thumbEl.getWidth();
                this.baseScale = height / this.imageEl.OriginHeight;
            }
            
            if(this.imageEl.OriginWidth > this.imageEl.OriginHeight){
                height = this.thumbEl.getWidth();
                this.baseScale = height / this.imageEl.OriginHeight;
                
                if(this.imageEl.OriginWidth * this.baseScale < this.thumbEl.getHeight()){
                    width = this.thumbEl.getHeight();
                    this.baseScale = width / this.imageEl.OriginWidth;
                }
            }
            
            return;
        }
        
        width = this.thumbEl.getWidth();
        this.baseScale = width / this.imageEl.OriginWidth;
        
        if(this.imageEl.OriginHeight * this.baseScale < this.thumbEl.getHeight()){
            height = this.thumbEl.getHeight();
            this.baseScale = height / this.imageEl.OriginHeight;
        }
        
        if(this.imageEl.OriginWidth > this.imageEl.OriginHeight){
            
            height = this.thumbEl.getHeight();
            this.baseScale = height / this.imageEl.OriginHeight;
            
            if(this.imageEl.OriginWidth * this.baseScale < this.thumbEl.getWidth()){
                width = this.thumbEl.getWidth();
                this.baseScale = width / this.imageEl.OriginWidth;
            }
            
        }

        if(this.imageEl.OriginWidth < this.minWidth || this.imageEl.OriginHeight < this.minHeight) {
            this.baseScale = width / this.minWidth;
        }

        return;
    },
    
    getScaleLevel : function()
    {
        return this.baseScale * Math.pow(1.02, this.scale);
    },
    
    onTouchStart : function(e)
    {
        if(!this.canvasLoaded){
            this.beforeSelectFile(e);
            return;
        }
        
        var touches = e.browserEvent.touches;
        
        if(!touches){
            return;
        }
        
        if(touches.length == 1){
            this.onMouseDown(e);
            return;
        }
        
        if(touches.length != 2){
            return;
        }
        
        var coords = [];
        
        for(var i = 0, finger; finger = touches[i]; i++){
            coords.push(finger.pageX, finger.pageY);
        }
        
        var x = Math.pow(coords[0] - coords[2], 2);
        var y = Math.pow(coords[1] - coords[3], 2);
        
        this.startDistance = Math.sqrt(x + y);
        
        this.startScale = this.scale;
        
        this.pinching = true;
        this.dragable = false;
        
    },
    
    onTouchMove : function(e)
    {
        if(!this.pinching && !this.dragable){
            return;
        }
        
        var touches = e.browserEvent.touches;
        
        if(!touches){
            return;
        }
        
        if(this.dragable){
            this.onMouseMove(e);
            return;
        }
        
        var coords = [];
        
        for(var i = 0, finger; finger = touches[i]; i++){
            coords.push(finger.pageX, finger.pageY);
        }
        
        var x = Math.pow(coords[0] - coords[2], 2);
        var y = Math.pow(coords[1] - coords[3], 2);
        
        this.endDistance = Math.sqrt(x + y);
        
        this.scale = this.startScale + Math.floor(Math.log(this.endDistance / this.startDistance) / Math.log(1.1));
        
        if(!this.zoomable()){
            this.scale = this.startScale;
            return;
        }
        
        this.draw();
        
    },
    
    onTouchEnd : function(e)
    {
        this.pinching = false;
        this.dragable = false;
        
    },
    
    process : function(file, crop)
    {
        if(this.loadMask){
            this.maskEl.mask(this.loadingText);
        }
        
        this.xhr = new XMLHttpRequest();
        
        file.xhr = this.xhr;

        this.xhr.open(this.method, this.url, true);
        
        var headers = {
            "Accept": "application/json",
            "Cache-Control": "no-cache",
            "X-Requested-With": "XMLHttpRequest"
        };
        
        for (var headerName in headers) {
            var headerValue = headers[headerName];
            if (headerValue) {
                this.xhr.setRequestHeader(headerName, headerValue);
            }
        }
        
        var _this = this;
        
        this.xhr.onload = function()
        {
            _this.xhrOnLoad(_this.xhr);
        }
        
        this.xhr.onerror = function()
        {
            _this.xhrOnError(_this.xhr);
        }
        
        var formData = new FormData();

        formData.append('returnHTML', 'NO');

        if(crop){
            formData.append('crop', crop);
            var blobBin = atob(crop.split(',')[1]);
            var array = [];
            for(var i = 0; i < blobBin.length; i++) {
                array.push(blobBin.charCodeAt(i));
            }
            var croppedFile =new Blob([new Uint8Array(array)], {type: this.cropType});
            formData.append(this.paramName, croppedFile, file.name);
        }
        
        if(typeof(file.filename) != 'undefined'){
            formData.append('filename', file.filename);
        }
        
        if(typeof(file.mimetype) != 'undefined'){
            formData.append('mimetype', file.mimetype);
        }

        if(this.fireEvent('arrange', this, formData) != false){
            this.xhr.send(formData);
        };
    },
    
    xhrOnLoad : function(xhr)
    {
        if(this.loadMask){
            this.maskEl.unmask();
        }
        
        if (xhr.readyState !== 4) {
            this.fireEvent('exception', this, xhr);
            return;
        }

        var response = Roo.decode(xhr.responseText);
        
        if(!response.success){
            this.fireEvent('exception', this, xhr);
            return;
        }
        
        var response = Roo.decode(xhr.responseText);
        
        this.fireEvent('upload', this, response);
        
    },
    
    xhrOnError : function()
    {
        if(this.loadMask){
            this.maskEl.unmask();
        }
        
        Roo.log('xhr on error');
        
        var response = Roo.decode(xhr.responseText);
          
        Roo.log(response);
        
    },
    
    prepare : function(file)
    {   
        if(this.loadMask){
            this.maskEl.mask(this.loadingText);
        }
        
        this.file = false;
        this.exif = {};
        
        if(typeof(file) === 'string'){
            this.loadCanvas(file);
            return;
        }
        
        if(!file || !this.urlAPI){
            return;
        }
        
        this.file = file;
        if(typeof(file.type) != 'undefined' && file.type.length != 0) {
            this.cropType = file.type;
        }
        
        var _this = this;
        
        if(this.fireEvent('prepare', this, this.file) != false){
            
            var reader = new FileReader();
            
            reader.onload = function (e) {
                if (e.target.error) {
                    Roo.log(e.target.error);
                    return;
                }
                
                var buffer = e.target.result,
                    dataView = new DataView(buffer),
                    offset = 2,
                    maxOffset = dataView.byteLength - 4,
                    markerBytes,
                    markerLength;
                
                if (dataView.getUint16(0) === 0xffd8) {
                    while (offset < maxOffset) {
                        markerBytes = dataView.getUint16(offset);
                        
                        if ((markerBytes >= 0xffe0 && markerBytes <= 0xffef) || markerBytes === 0xfffe) {
                            markerLength = dataView.getUint16(offset + 2) + 2;
                            if (offset + markerLength > dataView.byteLength) {
                                Roo.log('Invalid meta data: Invalid segment size.');
                                break;
                            }
                            
                            if(markerBytes == 0xffe1){
                                _this.parseExifData(
                                    dataView,
                                    offset,
                                    markerLength
                                );
                            }
                            
                            offset += markerLength;
                            
                            continue;
                        }
                        
                        break;
                    }
                    
                }
                
                var url = _this.urlAPI.createObjectURL(_this.file);
                
                _this.loadCanvas(url);
                
                return;
            }
            
            reader.readAsArrayBuffer(this.file);
            
        }
        
    },
    
    parseExifData : function(dataView, offset, length)
    {
        var tiffOffset = offset + 10,
            littleEndian,
            dirOffset;
    
        if (dataView.getUint32(offset + 4) !== 0x45786966) {
            // No Exif data, might be XMP data instead
            return;
        }
        
        // Check for the ASCII code for "Exif" (0x45786966):
        if (dataView.getUint32(offset + 4) !== 0x45786966) {
            // No Exif data, might be XMP data instead
            return;
        }
        if (tiffOffset + 8 > dataView.byteLength) {
            Roo.log('Invalid Exif data: Invalid segment size.');
            return;
        }
        // Check for the two null bytes:
        if (dataView.getUint16(offset + 8) !== 0x0000) {
            Roo.log('Invalid Exif data: Missing byte alignment offset.');
            return;
        }
        // Check the byte alignment:
        switch (dataView.getUint16(tiffOffset)) {
        case 0x4949:
            littleEndian = true;
            break;
        case 0x4D4D:
            littleEndian = false;
            break;
        default:
            Roo.log('Invalid Exif data: Invalid byte alignment marker.');
            return;
        }
        // Check for the TIFF tag marker (0x002A):
        if (dataView.getUint16(tiffOffset + 2, littleEndian) !== 0x002A) {
            Roo.log('Invalid Exif data: Missing TIFF marker.');
            return;
        }
        // Retrieve the directory offset bytes, usually 0x00000008 or 8 decimal:
        dirOffset = dataView.getUint32(tiffOffset + 4, littleEndian);
        
        this.parseExifTags(
            dataView,
            tiffOffset,
            tiffOffset + dirOffset,
            littleEndian
        );
    },
    
    parseExifTags : function(dataView, tiffOffset, dirOffset, littleEndian)
    {
        var tagsNumber,
            dirEndOffset,
            i;
        if (dirOffset + 6 > dataView.byteLength) {
            Roo.log('Invalid Exif data: Invalid directory offset.');
            return;
        }
        tagsNumber = dataView.getUint16(dirOffset, littleEndian);
        dirEndOffset = dirOffset + 2 + 12 * tagsNumber;
        if (dirEndOffset + 4 > dataView.byteLength) {
            Roo.log('Invalid Exif data: Invalid directory size.');
            return;
        }
        for (i = 0; i < tagsNumber; i += 1) {
            this.parseExifTag(
                dataView,
                tiffOffset,
                dirOffset + 2 + 12 * i, // tag offset
                littleEndian
            );
        }
        // Return the offset to the next directory:
        return dataView.getUint32(dirEndOffset, littleEndian);
    },
    
    parseExifTag : function (dataView, tiffOffset, offset, littleEndian) 
    {
        var tag = dataView.getUint16(offset, littleEndian);
        
        this.exif[tag] = this.getExifValue(
            dataView,
            tiffOffset,
            offset,
            dataView.getUint16(offset + 2, littleEndian), // tag type
            dataView.getUint32(offset + 4, littleEndian), // tag length
            littleEndian
        );
    },
    
    getExifValue : function (dataView, tiffOffset, offset, type, length, littleEndian)
    {
        var tagType = Roo.dialog.UploadCropbox.exifTagTypes[type],
            tagSize,
            dataOffset,
            values,
            i,
            str,
            c;
    
        if (!tagType) {
            Roo.log('Invalid Exif data: Invalid tag type.');
            return;
        }
        
        tagSize = tagType.size * length;
        // Determine if the value is contained in the dataOffset bytes,
        // or if the value at the dataOffset is a pointer to the actual data:
        dataOffset = tagSize > 4 ?
                tiffOffset + dataView.getUint32(offset + 8, littleEndian) : (offset + 8);
        if (dataOffset + tagSize > dataView.byteLength) {
            Roo.log('Invalid Exif data: Invalid data offset.');
            return;
        }
        if (length === 1) {
            return tagType.getValue(dataView, dataOffset, littleEndian);
        }
        values = [];
        for (i = 0; i < length; i += 1) {
            values[i] = tagType.getValue(dataView, dataOffset + i * tagType.size, littleEndian);
        }
        
        if (tagType.ascii) {
            str = '';
            // Concatenate the chars:
            for (i = 0; i < values.length; i += 1) {
                c = values[i];
                // Ignore the terminating NULL byte(s):
                if (c === '\u0000') {
                    break;
                }
                str += c;
            }
            return str;
        }
        return values;
    }
    
});

Roo.apply(Roo.dialog.UploadCropbox, {
    tags : {
        'Orientation': 0x0112
    },
    
    Orientation: {
            1: 0, //'top-left',
//            2: 'top-right',
            3: 180, //'bottom-right',
//            4: 'bottom-left',
//            5: 'left-top',
            6: 90, //'right-top',
//            7: 'right-bottom',
            8: 270 //'left-bottom'
    },
    
    exifTagTypes : {
        // byte, 8-bit unsigned int:
        1: {
            getValue: function (dataView, dataOffset) {
                return dataView.getUint8(dataOffset);
            },
            size: 1
        },
        // ascii, 8-bit byte:
        2: {
            getValue: function (dataView, dataOffset) {
                return String.fromCharCode(dataView.getUint8(dataOffset));
            },
            size: 1,
            ascii: true
        },
        // short, 16 bit int:
        3: {
            getValue: function (dataView, dataOffset, littleEndian) {
                return dataView.getUint16(dataOffset, littleEndian);
            },
            size: 2
        },
        // long, 32 bit int:
        4: {
            getValue: function (dataView, dataOffset, littleEndian) {
                return dataView.getUint32(dataOffset, littleEndian);
            },
            size: 4
        },
        // rational = two long values, first is numerator, second is denominator:
        5: {
            getValue: function (dataView, dataOffset, littleEndian) {
                return dataView.getUint32(dataOffset, littleEndian) /
                    dataView.getUint32(dataOffset + 4, littleEndian);
            },
            size: 8
        },
        // slong, 32 bit signed int:
        9: {
            getValue: function (dataView, dataOffset, littleEndian) {
                return dataView.getInt32(dataOffset, littleEndian);
            },
            size: 4
        },
        // srational, two slongs, first is numerator, second is denominator:
        10: {
            getValue: function (dataView, dataOffset, littleEndian) {
                return dataView.getInt32(dataOffset, littleEndian) /
                    dataView.getInt32(dataOffset + 4, littleEndian);
            },
            size: 8
        }
    },
    
    footer : {
        STANDARD : [
            {
                tag : 'div',
                cls : 'btn-group roo-upload-cropbox-rotate-left',
                action : 'rotate-left',
                cn : [
                    {
                        tag : 'button',
                        cls : 'btn btn-default',
                        html : '<i class="fa fa-undo"></i>'
                    }
                ]
            },
            {
                tag : 'div',
                cls : 'btn-group roo-upload-cropbox-picture',
                action : 'picture',
                cn : [
                    {
                        tag : 'button',
                        cls : 'btn btn-default',
                        html : '<i class="fa fa-picture-o"></i>'
                    }
                ]
            },
            {
                tag : 'div',
                cls : 'btn-group roo-upload-cropbox-rotate-right',
                action : 'rotate-right',
                cn : [
                    {
                        tag : 'button',
                        cls : 'btn btn-default',
                        html : '<i class="fa fa-repeat"></i>'
                    }
                ]
            }
        ],
        DOCUMENT : [
            {
                tag : 'div',
                cls : 'btn-group roo-upload-cropbox-rotate-left',
                action : 'rotate-left',
                cn : [
                    {
                        tag : 'button',
                        cls : 'btn btn-default',
                        html : '<i class="fa fa-undo"></i>'
                    }
                ]
            },
            {
                tag : 'div',
                cls : 'btn-group roo-upload-cropbox-download',
                action : 'download',
                cn : [
                    {
                        tag : 'button',
                        cls : 'btn btn-default',
                        html : '<i class="fa fa-download"></i>'
                    }
                ]
            },
            {
                tag : 'div',
                cls : 'btn-group roo-upload-cropbox-crop',
                action : 'crop',
                cn : [
                    {
                        tag : 'button',
                        cls : 'btn btn-default',
                        html : '<i class="fa fa-crop"></i>'
                    }
                ]
            },
            {
                tag : 'div',
                cls : 'btn-group roo-upload-cropbox-trash',
                action : 'trash',
                cn : [
                    {
                        tag : 'button',
                        cls : 'btn btn-default',
                        html : '<i class="fa fa-trash"></i>'
                    }
                ]
            },
            {
                tag : 'div',
                cls : 'btn-group roo-upload-cropbox-rotate-right',
                action : 'rotate-right',
                cn : [
                    {
                        tag : 'button',
                        cls : 'btn btn-default',
                        html : '<i class="fa fa-repeat"></i>'
                    }
                ]
            }
        ],
        ROTATOR : [
            {
                tag : 'div',
                cls : 'btn-group roo-upload-cropbox-rotate-left',
                action : 'rotate-left',
                cn : [
                    {
                        tag : 'button',
                        cls : 'btn btn-default',
                        html : '<i class="fa fa-undo"></i>'
                    }
                ]
            },
            {
                tag : 'div',
                cls : 'btn-group roo-upload-cropbox-rotate-right',
                action : 'rotate-right',
                cn : [
                    {
                        tag : 'button',
                        cls : 'btn btn-default',
                        html : '<i class="fa fa-repeat"></i>'
                    }
                ]
            }
        ],
        CENTER : [
            {
                tag : 'div',
                cls : 'btn-group roo-upload-cropbox-center',
                action : 'center',
                cn : [
                    {
                        tag : 'button',
                        cls : 'btn btn-default',
                        html : 'CENTER'
                    }
                ]
            }
        ]
    }
});