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var H5P = H5P || {}; H5P.JoubelProgressbar = (function ($) { /** * Joubel progressbar class * @method JoubelProgressbar * @constructor * @param {number} steps Number of steps * @param {Object} [options] Additional options * @param {boolean} [options.disableAria] Disable readspeaker assistance * @param {string} [options.progressText] A progress text for describing * current progress out of total progress for readspeakers. * e.g. "Slide :num of :total" */ function JoubelProgressbar(steps, options) { H5P.EventDispatcher.call(this); var self = this; this.options = $.extend({ progressText: 'Slide :num of :total' }, options); this.currentStep = 0; this.steps = steps; this.$progressbar = $('<div>', { 'class': 'h5p-joubelui-progressbar' }); this.$background = $('<div>', { 'class': 'h5p-joubelui-progressbar-background' }).appendTo(this.$progressbar); } JoubelProgressbar.prototype = Object.create(H5P.EventDispatcher.prototype); JoubelProgressbar.prototype.constructor = JoubelProgressbar; JoubelProgressbar.prototype.updateAria = function () { var self = this; if (this.options.disableAria) { return; } if (!this.$currentStatus) { this.$currentStatus = $('<div>', { 'class': 'h5p-joubelui-progressbar-slide-status-text', 'aria-live': 'assertive' }).appendTo(this.$progressbar); } var interpolatedProgressText = self.options.progressText .replace(':num', self.currentStep) .replace(':total', self.steps); this.$currentStatus.html(interpolatedProgressText); }; /** * Appends to a container * @method appendTo * @param {H5P.jquery} $container */ JoubelProgressbar.prototype.appendTo = function ($container) { this.$progressbar.appendTo($container); }; /** * Update progress * @method setProgress * @param {number} step */ JoubelProgressbar.prototype.setProgress = function (step) { // Check for valid value: if (step > this.steps || step < 0) { return; } this.currentStep = step; this.$background.css({ width: ((this.currentStep/this.steps)*100) + '%' }); this.updateAria(); }; /** * Increment progress with 1 * @method next */ JoubelProgressbar.prototype.next = function () { this.setProgress(this.currentStep+1); }; /** * Reset progressbar * @method reset */ JoubelProgressbar.prototype.reset = function () { this.setProgress(0); }; /** * Check if last step is reached * @method isLastStep * @return {Boolean} */ JoubelProgressbar.prototype.isLastStep = function () { return this.steps === this.currentStep; }; return JoubelProgressbar; })(H5P.jQuery);