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$(function() {
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// image_cropper
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altair_image_cropper.init();
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});
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altair_image_cropper = {
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init: function() {
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'use strict';
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var console = window.console || { log: function () {} };
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var $image = $('#image_cropper');
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var $download = $('#image_download');
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var options = {
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aspectRatio: 16 / 9,
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preview: '.cr_preview'
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};
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// Cropper
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$image.on({
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'build.cropper': function (e) {
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console.log(e.type);
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},
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'built.cropper': function (e) {
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console.log(e.type);
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},
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'cropstart.cropper': function (e) {
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console.log(e.type, e.action);
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},
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'cropmove.cropper': function (e) {
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console.log(e.type, e.action);
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},
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'cropend.cropper': function (e) {
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console.log(e.type, e.action);
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},
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'crop.cropper': function (e) {
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console.log(e.type, e.x, e.y, e.width, e.height, e.rotate, e.scaleX, e.scaleY);
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},
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'zoom.cropper': function (e) {
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console.log(e.type, e.ratio);
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}
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}).cropper(options);
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// Buttons
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if (!$.isFunction(document.createElement('canvas').getContext)) {
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$('button[data-method="getCroppedCanvas"]').prop('disabled', true);
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}
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if (typeof document.createElement('cropper').style.transition === 'undefined') {
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$('button[data-method="rotate"]').prop('disabled', true);
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$('button[data-method="scale"]').prop('disabled', true);
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}
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// Download
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console.log(typeof $download[0].download === 'undefined');
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if (typeof $download[0].download === 'undefined') {
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$download.addClass('disabled');
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}
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// Options
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$('.croper-toggles').on('click', 'button', function () {
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if($(this).hasClass('uk-active')) {
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var $this = $(this),
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value = $this.attr('data-value');
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if (!$image.data('cropper')) {
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return;
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}
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$image.cropper('setAspectRatio',value);
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}
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});
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// Methods
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$('.cropper-buttons').on('click', '[data-method]', function () {
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var $this = $(this);
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var data = $this.data();
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var $target;
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var result;
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if ($this.prop('disabled') || $this.hasClass('disabled')) {
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return;
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}
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if ($image.data('cropper') && data.method) {
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data = $.extend({}, data); // Clone a new one
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if (typeof data.target !== 'undefined') {
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$target = $(data.target);
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if (typeof data.option === 'undefined') {
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try {
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data.option = JSON.parse($target.val());
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} catch (e) {
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console.log(e.message);
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}
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}
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}
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result = $image.cropper(data.method, data.option, data.secondOption);
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switch (data.method) {
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case 'scaleX':
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case 'scaleY':
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$(this).data('option', -data.option);
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break;
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case 'getCroppedCanvas':
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if (result) {
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var modalId = '#getCroppedCanvasModal',
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modal = UIkit.modal(modalId);
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$(modalId).find('.canvasModalImage').html(result);
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modal.show();
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if (!$download.hasClass('disabled')) {
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$download.attr('href', result.toDataURL('image/jpeg'));
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}
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}
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break;
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}
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if ($.isPlainObject(result) && $target) {
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try {
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$target.val(JSON.stringify(result));
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} catch (e) {
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console.log(e.message);
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}
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}
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}
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});
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// Keyboard
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$(document.body).on('keydown', function (e) {
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if (!$image.data('cropper') || this.scrollTop > 300) {
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return;
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}
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switch (e.which) {
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case 37:
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e.preventDefault();
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$image.cropper('move', -1, 0);
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break;
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case 38:
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e.preventDefault();
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$image.cropper('move', 0, -1);
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break;
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case 39:
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e.preventDefault();
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$image.cropper('move', 1, 0);
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break;
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case 40:
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e.preventDefault();
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$image.cropper('move', 0, 1);
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break;
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}
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});
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// Import image
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var $inputImage = $('#inputImage'),
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$imageUrl;
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var URL = window.URL || window.webkitURL;
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var blobURL;
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if (URL) {
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$inputImage.change(function () {
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var files = this.files;
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var file;
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if (!$image.data('cropper')) {
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return;
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}
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if (files && files.length) {
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file = files[0];
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if (/^image\/\w+$/.test(file.type)) {
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blobURL = URL.createObjectURL(file);
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$image.one('built.cropper', function () {
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// Revoke when load complete
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URL.revokeObjectURL(blobURL);
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}).cropper('reset').cropper('replace', blobURL);
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$inputImage.val('');
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$imageUrl = blobURL;
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} else {
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window.alert('Please choose an image file.');
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}
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}
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});
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} else {
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$inputImage.prop('disabled', true).parent().addClass('disabled');
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}
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}
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};
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