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See the\n// GNU General Public License for more details.\n//\n// You should have received a copy of the GNU General Public License\n// along with Moodle. If not, see <http://www.gnu.org/licenses/>.\n\n/**\n * Chart axis.\n *\n * @package core\n * @copyright 2016 Frédéric Massart - FMCorz.net\n * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later\n * @module core/chart_axis\n */\ndefine([], function() {\n\n /**\n * Chart axis class.\n *\n * This is used to represent an axis, whether X or Y.\n *\n * @alias module:core/chart_axis\n * @class\n */\n function Axis() {\n // Please eslint no-empty-function.\n }\n\n /**\n * Default axis position.\n * @const {Null}\n */\n Axis.prototype.POS_DEFAULT = null;\n\n /**\n * Bottom axis position.\n * @const {String}\n */\n Axis.prototype.POS_BOTTOM = 'bottom';\n\n /**\n * Left axis position.\n * @const {String}\n */\n Axis.prototype.POS_LEFT = 'left';\n\n /**\n * Right axis position.\n * @const {String}\n */\n Axis.prototype.POS_RIGHT = 'right';\n\n /**\n * Top axis position.\n * @const {String}\n */\n Axis.prototype.POS_TOP = 'top';\n\n /**\n * Label of the axis.\n * @type {String}\n * @protected\n */\n Axis.prototype._label = null;\n\n /**\n * Labels of the ticks.\n * @type {String[]}\n * @protected\n */\n Axis.prototype._labels = null;\n\n /**\n * Maximum value of the axis.\n * @type {Number}\n * @protected\n */\n Axis.prototype._max = null;\n\n /**\n * Minimum value of the axis.\n * @type {Number}\n * @protected\n */\n Axis.prototype._min = null;\n\n /**\n * Position of the axis.\n * @type {String}\n * @protected\n */\n Axis.prototype._position = null;\n\n /**\n * Steps on the axis.\n * @type {Number}\n * @protected\n */\n Axis.prototype._stepSize = null;\n\n /**\n * Create a new instance of an axis from serialised data.\n *\n * @static\n * @method create\n * @param {Object} obj The data of the axis.\n * @return {module:core/chart_axis}\n */\n Axis.prototype.create = function(obj) {\n var s = new Axis();\n s.setPosition(obj.position);\n s.setLabel(obj.label);\n s.setStepSize(obj.stepSize);\n s.setMax(obj.max);\n s.setMin(obj.min);\n s.setLabels(obj.labels);\n return s;\n };\n\n /**\n * Get the label of the axis.\n *\n * @method getLabel\n * @return {String}\n */\n Axis.prototype.getLabel = function() {\n return this._label;\n };\n\n /**\n * Get the labels of the ticks of the axis.\n *\n * @method getLabels\n * @return {String[]}\n */\n Axis.prototype.getLabels = function() {\n return this._labels;\n };\n\n /**\n * Get the maximum value of the axis.\n *\n * @method getMax\n * @return {Number}\n */\n Axis.prototype.getMax = function() {\n return this._max;\n };\n\n /**\n * Get the minimum value of the axis.\n *\n * @method getMin\n * @return {Number}\n */\n Axis.prototype.getMin = function() {\n return this._min;\n };\n\n /**\n * Get the position of the axis.\n *\n * @method getPosition\n * @return {String}\n */\n Axis.prototype.getPosition = function() {\n return this._position;\n };\n\n /**\n * Get the step size of the axis.\n *\n * @method getStepSize\n * @return {Number}\n */\n Axis.prototype.getStepSize = function() {\n return this._stepSize;\n };\n\n /**\n * Set the label of the axis.\n *\n * @method setLabel\n * @param {String} label The label.\n */\n Axis.prototype.setLabel = function(label) {\n this._label = label || null;\n };\n\n /**\n * Set the labels of the values on the axis.\n *\n * This automatically sets the [_stepSize]{@link module:core/chart_axis#_stepSize},\n * [_min]{@link module:core/chart_axis#_min} and [_max]{@link module:core/chart_axis#_max}\n * to define a scale from 0 to the number of labels when none of the previously\n * mentioned values have been modified.\n *\n * You can use other values so long that your values in a series are mapped\n * to the values represented by your _min, _max and _stepSize.\n *\n * @method setLabels\n * @param {String[]} labels The labels.\n */\n Axis.prototype.setLabels = function(labels) {\n this._labels = labels || null;\n\n // By default we set the grid according to the labels.\n if (this._labels !== null\n && this._stepSize === null\n && (this._min === null || this._min === 0)\n && this._max === null) {\n this.setStepSize(1);\n this.setMin(0);\n this.setMax(labels.length - 1);\n }\n };\n\n /**\n * Set the maximum value on the axis.\n *\n * When this is not set (or set to null) it is left for the output\n * library to best guess what should be used.\n *\n * @method setMax\n * @param {Number} max The value.\n */\n Axis.prototype.setMax = function(max) {\n this._max = typeof max !== 'undefined' ? max : null;\n };\n\n /**\n * Set the minimum value on the axis.\n *\n * When this is not set (or set to null) it is left for the output\n * library to best guess what should be used.\n *\n * @method setMin\n * @param {Number} min The value.\n */\n Axis.prototype.setMin = function(min) {\n this._min = typeof min !== 'undefined' ? min : null;\n };\n\n /**\n * Set the position of the axis.\n *\n * This does not validate whether or not the constant used is valid\n * as the axis itself is not aware whether it represents the X or Y axis.\n *\n * The output library has to have a fallback in case the values are incorrect.\n * When this is not set to {@link module:core/chart_axis#POS_DEFAULT} it is up\n * to the output library to choose what position fits best.\n *\n * @method setPosition\n * @param {String} position The value.\n */\n Axis.prototype.setPosition = function(position) {\n if (position != this.POS_DEFAULT\n && position != this.POS_BOTTOM\n && position != this.POS_LEFT\n && position != this.POS_RIGHT\n && position != this.POS_TOP) {\n throw new Error('Invalid axis position.');\n }\n this._position = position;\n };\n\n /**\n * Set the stepSize on the axis.\n *\n * This is used to determine where ticks are displayed on the axis between min and max.\n *\n * @method setStepSize\n * @param {Number} stepSize The value.\n */\n Axis.prototype.setStepSize = function(stepSize) {\n if (typeof stepSize === 'undefined' || stepSize === null) {\n stepSize = null;\n } else if (isNaN(Number(stepSize))) {\n throw new Error('Value for stepSize is not a number.');\n } else {\n stepSize = Number(stepSize);\n }\n\n this._stepSize = stepSize;\n };\n\n return Axis;\n\n});\n"],"file":"chart_axis.min.js"}