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/**
 *
 * HTML5 Image uploader with Jcrop
 *
 * Licensed under the MIT license.
 * http://www.opensource.org/licenses/mit-license.php
 * 
 * Copyright 2012, Script Tutorials
 * http://www.script-tutorials.com/
 */

// convert bytes into friendly format
function bytesToSize(bytes) {
    var sizes = ['Bytes', 'KB', 'MB'];
    if (bytes == 0) return 'n/a';
    var i = parseInt(Math.floor(Math.log(bytes) / Math.log(1024)));
    return (bytes / Math.pow(1024, i)).toFixed(1) + ' ' + sizes[i];
};

// check for selected crop region
function checkForm() {
    if (parseInt($('#w').val())) return true;
    $('.error').html('Please select a crop region and then press Upload').show();
    return false;
};

// update info by cropping (onChange and onSelect events handler)
function updateInfo(e) {
    $('#x1').val(e.x);
    $('#y1').val(e.y);
    $('#x2').val(e.x2);
    $('#y2').val(e.y2);
    $('#w').val(e.w);
    $('#h').val(e.h);
};

// clear info by cropping (onRelease event handler)
function clearInfo() {
    $('.info #w').val('');
    $('.info #h').val('');
};

function fileSelectHandler() {

    // get selected file
    var oFile = $('#image_file')[0].files[0];

    // hide all errors
    $('.error').hide();

    // check for image type (jpg and png are allowed)
    var rFilter = /^(image\/jpeg|image\/png)$/i;
    if (! rFilter.test(oFile.type)) {
        $('.error').html('Please select a valid image file (jpg and png are allowed)').show();
        return;
    }

    // check for file size
    if (oFile.size > 250 * 1024) {
        $('.error').html('You have selected too big file, please select a one smaller image file').show();
        return;
    }

    // preview element
    var oImage = document.getElementById('preview');

    // prepare HTML5 FileReader
    var oReader = new FileReader();
        oReader.onload = function(e) {

        // e.target.result contains the DataURL which we can use as a source of the image
        oImage.src = e.target.result;
        oImage.onload = function () { // onload event handler

            // display step 2
            $('.step2').fadeIn(500);

            // display some basic image info
            var sResultFileSize = bytesToSize(oFile.size);
            $('#filesize').val(sResultFileSize);
            $('#filetype').val(oFile.type);
            $('#filedim').val(oImage.naturalWidth + ' x ' + oImage.naturalHeight);

            // Create variables (in this scope) to hold the Jcrop API and image size
            var jcrop_api, boundx, boundy;

            // destroy Jcrop if it is existed
            if (typeof jcrop_api != 'undefined') 
                jcrop_api.destroy();

            // initialize Jcrop
            $('#preview').Jcrop({
                minSize: [32, 32], // min crop size
                aspectRatio : 1, // keep aspect ratio 1:1
                bgFade: true, // use fade effect
                bgOpacity: .3, // fade opacity
                onChange: updateInfo,
                onSelect: updateInfo,
                onRelease: clearInfo
            }, function(){

                // use the Jcrop API to get the real image size
                var bounds = this.getBounds();
                boundx = bounds[0];
                boundy = bounds[1];

                // Store the Jcrop API in the jcrop_api variable
                jcrop_api = this;
            });
        };
    };

    // read selected file as DataURL
    oReader.readAsDataURL(oFile);
}

	/**
	*
	* HTML5 Image uploader with Jcrop
	*
	* Licensed under the MIT license.
	* http://www.opensource.org/licenses/mit-license.php
	*
	* Copyright 2012, Script Tutorials
	* http://www.script-tutorials.com/
	*/

	// convert bytes into friendly format
	function bytesToSize(bytes) {
	var sizes = ['Bytes', 'KB', 'MB'];
	if (bytes == 0) return 'n/a';
	var i = parseInt(Math.floor(Math.log(bytes) / Math.log(1024)));
	return (bytes / Math.pow(1024, i)).toFixed(1) + ' ' + sizes[i];
	};

	// check for selected crop region
	function checkForm() {
	if (parseInt($('#w').val())) return true;
	$('.error').html('Please select a crop region and then press Upload').show();
	return false;
	};

	// update info by cropping (onChange and onSelect events handler)
	function updateInfo(e) {
	$('#x1').val(e.x);
	$('#y1').val(e.y);
	$('#x2').val(e.x2);
	$('#y2').val(e.y2);
	$('#w').val(e.w);
	$('#h').val(e.h);
	};

	// clear info by cropping (onRelease event handler)
	function clearInfo() {
	$('.info #w').val('');
	$('.info #h').val('');
	};

	function fileSelectHandler() {

	// get selected file
	var oFile = $('#image_file')[0].files[0];

	// hide all errors
	$('.error').hide();

	// check for image type (jpg and png are allowed)
	var rFilter = /^(image\/jpeg\|image\/png)$/i;
	if (! rFilter.test(oFile.type)) {
	$('.error').html('Please select a valid image file (jpg and png are allowed)').show();
	return;
	}

	// check for file size
	if (oFile.size > 250 * 1024) {
	$('.error').html('You have selected too big file, please select a one smaller image file').show();
	return;
	}

	// preview element
	var oImage = document.getElementById('preview');

	// prepare HTML5 FileReader
	var oReader = new FileReader();
	oReader.onload = function(e) {

	// e.target.result contains the DataURL which we can use as a source of the image
	oImage.src = e.target.result;
	oImage.onload = function () { // onload event handler

	// display step 2
	$('.step2').fadeIn(500);

	// display some basic image info
	var sResultFileSize = bytesToSize(oFile.size);
	$('#filesize').val(sResultFileSize);
	$('#filetype').val(oFile.type);
	$('#filedim').val(oImage.naturalWidth + ' x ' + oImage.naturalHeight);

	// Create variables (in this scope) to hold the Jcrop API and image size
	var jcrop_api, boundx, boundy;

	// destroy Jcrop if it is existed
	if (typeof jcrop_api != 'undefined')
	jcrop_api.destroy();

	// initialize Jcrop
	$('#preview').Jcrop({
	minSize: [32, 32], // min crop size
	aspectRatio : 1, // keep aspect ratio 1:1
	bgFade: true, // use fade effect
	bgOpacity: .3, // fade opacity
	onChange: updateInfo,
	onSelect: updateInfo,
	onRelease: clearInfo
	}, function(){

	// use the Jcrop API to get the real image size
	var bounds = this.getBounds();
	boundx = bounds[0];
	boundy = bounds[1];

	// Store the Jcrop API in the jcrop_api variable
	jcrop_api = this;
	});
	};
	};

	// read selected file as DataURL
	oReader.readAsDataURL(oFile);
	}