Team:Ciencias-UNAM/scripts/axutils

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Revision as of 00:15, 12 August 2013 by Dheredia (Talk | contribs)
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/*

*
*
*
*
*/
(function() {
    // define the root namespace object
    window._axUtils = { };
    // ------------------------------------------------------------------------
    // Makes an object bindable
    // ------------------------------------------------------------------------
    _axUtils.makeBindable = function(obj, events) {
        if (obj.registeredBindings != null) return;
        // copy the events
        obj.bindableEvents = events.slice();
        obj.registeredBindings = { };
        obj.bind = function(eventName, fn) {
            var binding = { };
            binding.eventName = eventName;
            binding.action = fn;
            var bindingList = this.registeredBindings[eventName];
            if (bindingList == null) {
                bindingList = [];
                this.registeredBindings[eventName] = bindingList;
            }
            bindingList[bindingList.length] = binding;
        };
        obj.unbind = function(eventName) {
            if (eventName.indexOf('.') >= 0) {
                this.registeredBindings[eventName] = null;
            } else {
                var event = eventName.split('.')[0];
                for (var bindingKey in this.registeredBindings) {
                    if (bindingKey.split('.')[0] == event) {
                        this.registeredBindings[bindingKey] = null;
                    }
                }
            }
        };
        obj.triggerEvent = function(eventName, arg) {
            for (var bindingKey in this.registeredBindings) {
                if (bindingKey.split('.')[0] == eventName) {
                    var bindings = this.registeredBindings[bindingKey];
                    for (var i = 0; i < bindings.length; i++) {
                        if (arg == null) {
                            bindings[i].action();
                        } else {
                            bindings[i].action(arg);
                        }
                    }
                }
            }
        };
    };


    _axUtils.loadCSS = function(url) {
        $('head').append('<link text="text/css" href="' + url + '" rel="Stylesheet" />');
    };
    _axUtils.loadJS = function(url) {
        $('head').append('<script text="text/javascript" language="JavaScript" src="' + url + '"></script>');
    };
    _axUtils.curry = function(fn) {
        var curriedArgs = Array.prototype.slice.call(arguments, [1]);
        return function() {
            fn.apply(this, curriedArgs.concat(Array.prototype.slice.call(arguments)));
        };
    };
    _axUtils.succeeded = function(result) {
        return result && result.success;
    };
    _axUtils.createUniqueTag = function() {
        return Math.random().toString().substring(2) +
            Math.random().toString().substring(2) +
                Math.random().toString().substring(2) +
                    Math.random().toString().substring(2);
    };
    _axUtils.formatDate = function(date) {
        var months = [
            "Jan", "Feb", "Mar", "Apr", "May", "Jun",
            "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"];
        var hours = date.getHours();
        var amPm = (hours > 11 ? 'PM' : 'AM');
        hours = hours % 12;
        if (hours == '0') hours = '12';
        var minutes = date.getMinutes() + ;
        if (minutes.length == 1) {
            minutes = '0' + minutes;
        }
        return [
            months[date.getMonth()], ' ', date.getDate(), ' ', date.getFullYear(), ' ',
            hours, ':', minutes, ' ', amPm].join();
    };
    _axUtils.quickObject = function() {
        var returnVal = { };
        for (var i = 0; i < arguments.length; i += 2) {
            returnVal[arguments[i]] = arguments[i + 1];
        }
        return returnVal;
    };
    var matrixBase = {
        mul: function(val) {
            if (val.x !== undefined) {
                return _axUtils.Vector2D(
                    this.m11 * val.x + this.m12 * val.y + this.tx,
                    this.m21 * val.x + this.m22 * val.y + this.ty);
            } else if (val.m11) {
                return _axUtils.Matrix2D(
                    this.m11 * val.m11 + this.m12 * val.m21,
                    this.m11 * val.m12 + this.m12 * val.m22,
                    this.m21 * val.m11 + this.m22 * val.m21,
                    this.m21 * val.m12 + this.m22 * val.m22,
                    val.tx + this.tx * val.m11 + this.ty * val.m21,
                    val.ty + this.tx * val.m12 + this.ty * val.m22
                );
            } else if (Number(val)) {
                var num = Number(val);
                return _axUtils.Matrix2D(this.m11 * num, this.m12 * num,
                    this.m21 * num, this.m22 * num,
                    this.tx * num, this.ty * num);
            } else return undefined;
        },
        rotate: function(angle) {
            var angleRad = angle * Math.PI / 180;
            var c = Math.cos(angleRad);
            var s = Math.sin(angleRad);
            return this.mul(_axUtils.Matrix2D(c, -s, s, c));
        }
    };
    _axUtils.Matrix2D = function(m11, m12, m21, m22, tx, ty) {
        return $.extend({
            m11: m11 || 0,
            m12: m12 || 0,
            m21: m21 || 0,
            m22: m22 || 0,
            tx: tx || 0,
            ty: ty || 0
        }, matrixBase);
    };
    _axUtils.Vector2D = function(x, y) {
        return { x: x || 0, y: y || 0 };
    };
    _axUtils.Matrix2D.identity = function() {
        return _axUtils.Matrix2D(1, 0, 0, 1, 0, 0);
    };


})();