    /**
     * @class Ext.chart.axis.Axis
     *
     * Defines axis for charts. The axis position, type, style can be configured.
     * The axes are defined in an axes array of configuration objects where the type,
     * field, grid and other configuration options can be set. To know more about how
     * to create a Chart please check the Chart class documentation. Here's an example for the axes part:
     * An example of axis for a series (in this case for an area chart that has multiple layers of yFields) could be:
     *
     *     axes: [{
     *         type: 'Numeric',
     *         position: 'left',
     *         fields: ['data1', 'data2', 'data3'],
     *         title: 'Number of Hits',
     *         grid: {
     *             odd: {
     *                 opacity: 1,
     *                 fill: '#ddd',
     *                 stroke: '#bbb',
     *                 'stroke-width': 1
     *             }
     *         },
     *         minimum: 0
     *     }, {
     *         type: 'Category',
     *         position: 'bottom',
     *         fields: ['name'],
     *         title: 'Month of the Year',
     *         grid: true,
     *         label: {
     *             rotate: {
     *                 degrees: 315
     *             }
     *         }
     *     }]
     *
     * In this case we use a `Numeric` axis for displaying the values of the Area series and a `Category` axis for displaying the names of
     * the store elements. The numeric axis is placed on the left of the screen, while the category axis is placed at the bottom of the chart.
     * Both the category and numeric axes have `grid` set, which means that horizontal and vertical lines will cover the chart background. In the
     * category axis the labels will be rotated so they can fit the space better.
     */
    Ext.define('Ext.chart.axis.Axis', {

        /* Begin Definitions */

        extend: 'Ext.chart.axis.Abstract',

        alternateClassName: 'Ext.chart.Axis',

        requires: ['Ext.draw.Draw'],

        /* End Definitions */

        /**
         * @cfg {Boolean/Object} grid
         * The grid configuration enables you to set a background grid for an axis.
         * If set to *true* on a vertical axis, vertical lines will be drawn.
         * If set to *true* on a horizontal axis, horizontal lines will be drawn.
         * If both are set, a proper grid with horizontal and vertical lines will be drawn.
         *
         * You can set specific options for the grid configuration for odd and/or even lines/rows.
         * Since the rows being drawn are rectangle sprites, you can set to an odd or even property
         * all styles that apply to {@link Ext.draw.Sprite}. For more information on all the style
         * properties you can set please take a look at {@link Ext.draw.Sprite}. Some useful style
         * properties are `opacity`, `fill`, `stroke`, `stroke-width`, etc.
         *
         * The possible values for a grid option are then *true*, *false*, or an object with `{ odd, even }` properties
         * where each property contains a sprite style descriptor object that is defined in {@link Ext.draw.Sprite}.
         *
         * For example:
         *
         *     axes: [{
         *         type: 'Numeric',
         *         position: 'left',
         *         fields: ['data1', 'data2', 'data3'],
         *         title: 'Number of Hits',
         *         grid: {
         *             odd: {
         *                 opacity: 1,
         *                 fill: '#ddd',
         *                 stroke: '#bbb',
         *                 'stroke-width': 1
         *             }
         *         }
         *     }, {
         *         type: 'Category',
         *         position: 'bottom',
         *         fields: ['name'],
         *         title: 'Month of the Year',
         *         grid: true
         *     }]
         *
         */

        /**
         * @cfg {Number} majorTickSteps
         * If `minimum` and `maximum` are specified it forces the number of major ticks to the specified value.
         * If a number of major ticks is forced, it wont search for pretty numbers at the ticks.
         */

        /**
         * @cfg {Number} minorTickSteps
         * The number of small ticks between two major ticks. Default is zero.
         */

        /**
         * @cfg {String} title
         * The title for the Axis
         */

         /**
          * @cfg {Boolean} hidden
          * `true` to hide the axis.
          */
         hidden: false,

        // @private force min/max values from store
        forceMinMax: false,

        /**
         * @cfg {Number} dashSize
         * The size of the dash marker. Default's 3.
         */
        dashSize: 3,

        /**
         * @cfg {String} position
         * Where to set the axis. Available options are `left`, `bottom`, `right`, `top`. Default's `bottom`.
         */
        position: 'bottom',

        // @private
        skipFirst: false,

        /**
         * @cfg {Number} length
         * Offset axis position. Default's 0.
         */
        length: 0,

        /**
         * @cfg {Number} width
         * Offset axis width. Default's 0.
         */
        width: 0,

        /**
         * @cfg {Boolean} adjustEnd
         * Whether to adjust the label at the end of the axis.
         */
        adjustEnd: true,

        majorTickSteps: false,

        nullGutters: { lower: 0, upper: 0, verticalAxis: undefined },

        // @private
        applyData: Ext.emptyFn,

        getRange: function () {
            var me = this,
                chart = me.chart,
                store = chart.getChartStore(),
                data = store.data.items,
                series = chart.series.items,
                position = me.position,
                axes,
                seriesClasses = Ext.chart.series,
                aggregations = [],
                min = Infinity, max = -Infinity,
                vertical = me.position === 'left' || me.position === 'right' || me.position === 'radial',
                i, ln, ln2, j, k, dataLength = data.length, aggregates,
                countedFields = {},
                allFields = {},
                excludable = true,
                fields, fieldMap, record, field, value;

            fields = me.fields;
            for (j = 0, ln = fields.length; j < ln; j++) {
                allFields[fields[j]] = true;
            }

            for (i = 0, ln = series.length; i < ln; i++) {
                if (series[i].seriesIsHidden) {
                    continue;
                }
                if (!series[i].getAxesForXAndYFields) {
                    continue;
                }
                axes = series[i].getAxesForXAndYFields();
                if (axes.xAxis && axes.xAxis !== position && axes.yAxis && axes.yAxis !== position) {
                    // The series doesn't use this axis.
                    continue;
                }

                if (seriesClasses.Bar && series[i] instanceof seriesClasses.Bar && !series[i].column) {
                    // If this is a horizontal bar series, then flip xField and yField.
                    fields = vertical ? Ext.Array.from(series[i].xField) : Ext.Array.from(series[i].yField);
                } else {
                    fields = vertical ? Ext.Array.from(series[i].yField) : Ext.Array.from(series[i].xField);
                }

                if (me.fields.length) {
                    for (j = 0, ln2 = fields.length; j < ln2; j++) {
                        if (allFields[fields[j]]) {
                            break;
                        }
                    }
                    if (j == ln2) {
                        // Not matching fields, skipping this series.
                        continue;
                    }
                }

                if (aggregates = series[i].stacked) {
                    // If this is a bar/column series, then it will be aggregated if it is of the same direction of the axis.
                    if (seriesClasses.Bar && series[i] instanceof seriesClasses.Bar) {
                        if (series[i].column != vertical) {
                            aggregates = false;
                            excludable = false;
                        }
                    }
                    // Otherwise it is stacked vertically
                    else if (!vertical) {
                        aggregates = false;
                        excludable = false;
                    }
                }

                if (aggregates) {
                    fieldMap = {};
                    for (j = 0; j < fields.length; j++) {
                        if (excludable && series[i].__excludes && series[i].__excludes[j]) {
                            continue;
                        }
                        if (!allFields[fields[j]]) {
                            Ext.Logger.warn('Field `' + fields[j] + '` is not included in the ' + position + ' axis config.');
                        }
                        allFields[fields[j]] = fieldMap[fields[j]] = true;
                    }
                    aggregations.push({
                        fields: fieldMap,
                        positiveValue: 0,
                        negativeValue: 0
                    });
                } else {

                    if (!fields || fields.length == 0) {
                        fields = me.fields;
                    }
                    for (j = 0; j < fields.length; j++) {
                        if (excludable && series[i].__excludes && series[i].__excludes[j]) {
                            continue;
                        }
                        allFields[fields[j]] = countedFields[fields[j]] = true;
                    }
                }
            }

            for (i = 0; i < dataLength; i++) {
                record = data[i];
                for (k = 0; k < aggregations.length; k++) {
                    aggregations[k].positiveValue = 0;
                    aggregations[k].negativeValue = 0;
                }
                for (field in allFields) {
                    value = record.get(field);
                    if (me.type == 'Time' && typeof value == "string") {
                        value = Date.parse(value);
                    }
                    if (isNaN(value)) {
                        continue;
                    }
                    if (value === undefined) {
                        value = 0;
                    } else {
                        value = Number(value);
                    }
                    if (countedFields[field]) {
                        if (min > value) {
                            min = value;
                        }
                        if (max < value) {
                            max = value;
                        }
                    }
                    for (k = 0; k < aggregations.length; k++) {
                        if (aggregations[k].fields[field]) {

                            if (value >= 0) {
                                aggregations[k].positiveValue += value;
                                if (max < aggregations[k].positiveValue) {
                                    max = aggregations[k].positiveValue;
                                }
                                // If any aggregation is actually hit, then the min value should be at most 0.
                                if (min > 0) {
                                    min = 0;
                                }
                            } else {
                                aggregations[k].negativeValue += value;
                                if (min > aggregations[k].negativeValue) {
                                    min = aggregations[k].negativeValue;
                                }
                                // If any aggregation is actually hit, then the max value should be at least 0.
                                if (max < 0) {
                                    max = 0;
                                }
                            }
                        }
                    }
                }
            }

            if (!isFinite(max)) {
                max = me.prevMax || 0;
            }
            if (!isFinite(min)) {
                min = me.prevMin || 0;
            }

            if (typeof min === 'number') {
                min = Ext.Number.correctFloat(min);
            }

            if (typeof max === 'number') {
                max = Ext.Number.correctFloat(max);
            }

            //normalize min max for snapEnds.
            if (min != max && (max != Math.floor(max) || min != Math.floor(min))) {
                min = Math.floor(min);
                max = Math.floor(max) + 1;
            }

            if (!isNaN(me.minimum)) {
                min = me.minimum;
            }

            if (!isNaN(me.maximum)) {
                max = me.maximum;
            }

            if (min >= max) {
                // snapEnds will return NaN if max >= min;
                min = Math.floor(min);
                max = min + 1;
            }

            return {min: min, max: max};
        },

        // @private creates a structure with start, end and step points.
        calcEnds: function () {
            var me = this,
                range = me.getRange(),
                min = range.min,
                max = range.max,
                steps, prettyNumbers, out, changedRange;

            steps = (Ext.isNumber(me.majorTickSteps) ? me.majorTickSteps + 1 : me.steps);
            prettyNumbers = !(Ext.isNumber(me.maximum) && Ext.isNumber(me.minimum) && Ext.isNumber(me.majorTickSteps) && me.majorTickSteps > 0);

            out = Ext.draw.Draw.snapEnds(min, max, steps, prettyNumbers);

            if (Ext.isNumber(me.maximum)) {
                out.to = me.maximum;
                changedRange = true;
            }
            if (Ext.isNumber(me.minimum)) {
                out.from = me.minimum;
                changedRange = true;
            }
            if (me.adjustMaximumByMajorUnit) {
                out.to = Math.ceil(out.to / out.step) * out.step;
                changedRange = true;
            }
            if (me.adjustMinimumByMajorUnit) {
                out.from = Math.floor(out.from / out.step) * out.step;
                changedRange = true;
            }

            if (changedRange) {
                out.steps = Math.ceil((out.to - out.from) / out.step);
            }

            me.prevMin = (min == max ? 0 : min);
            me.prevMax = max;
            return out;
        },

        /**
         * Renders the axis into the screen and updates its position.
         */
        drawAxis: function (init) {
            var me = this,
                i,
                x = me.x,
                y = me.y,
                dashSize = me.dashSize,
                length = me.length,
                position = me.position,
                verticalAxis = (position == 'left' || position == 'right'),
                inflections = [],
                calcLabels = (me.isNumericAxis),
                stepCalcs = me.applyData(),
                step = stepCalcs.step,
                steps = stepCalcs.steps,
                stepsArray = Ext.isArray(steps),
                from = stepCalcs.from,
                to = stepCalcs.to,
                // If we have a single item, to - from will be 0.
                axisRange = (to - from) || 1,
                trueLength,
                currentX,
                currentY,
                path,
                subDashesX = me.minorTickSteps || 0,
                subDashesY = me.minorTickSteps || 0,
                dashesX = Math.max(subDashesX + 1, 0),
                dashesY = Math.max(subDashesY + 1, 0),
                dashDirection = (position == 'left' || position == 'top' ? -1 : 1),
                dashLength = dashSize * dashDirection,
                series = me.chart.series.items,
                firstSeries = series[0],
                gutters = firstSeries ? firstSeries.nullGutters : me.nullGutters,
                padding,
                subDashes,
                subDashValue,
                delta = 0,
                stepCount = 0,
                tick, axes, ln, val, begin, end;

            me.from = from;
            me.to = to;

            // If there is nothing to show, then leave.
            if (me.hidden || (from > to)) {
                return;
            }

            // If no steps are specified (for instance if the store is empty), then leave.
            if ((stepsArray && (steps.length == 0)) || (!stepsArray && isNaN(step))) {
                return;
            }

            if (stepsArray) {
                // Clean the array of steps:
                // First remove the steps that are out of bounds.
                steps = Ext.Array.filter(steps, function(elem, index, array) {
                    return (+elem > +me.from && +elem < +me.to);
                }, this);

                // Then add bounds on each side.
                steps = Ext.Array.union([me.from], steps, [me.to]);
            }
            else {
                // Build the array of steps out of the fixed-value 'step'.
                steps = new Array;
                for (val = +me.from; val < +me.to; val += step) {
                    steps.push(val);
                }
                steps.push(+me.to);
            }
            stepCount = steps.length;

            // Get the gutters for this series
            for (i = 0, ln = series.length; i < ln; i++) {
                if (series[i].seriesIsHidden) {
                    continue;
                }
                if (!series[i].getAxesForXAndYFields) {
                    continue;
                }
                axes = series[i].getAxesForXAndYFields();
                if (!axes.xAxis || !axes.yAxis || (axes.xAxis === position) || (axes.yAxis === position)) {
                    gutters = series[i].getGutters();
                    if ((gutters.verticalAxis !== undefined) && (gutters.verticalAxis != verticalAxis)) {
                        // This series has gutters that don't apply to the direction of this axis
                        // (for instance, gutters for Bars apply to the vertical axis while gutters
                        // for Columns apply to the horizontal axis). Since there is no gutter, the
                        // padding is all that is left to take into account.
                        padding = series[i].getPadding();
                        if (verticalAxis) {
                            gutters = { lower: padding.bottom, upper: padding.top, verticalAxis: true };
                        } else {
                            gutters = { lower: padding.left, upper: padding.right, verticalAxis: false };
                        }
                    }
                    break;
                }
            }

            // Draw the major ticks

            if (calcLabels) {
                me.labels = [];
            }

            if (gutters) {
                if (verticalAxis) {
                    currentX = Math.floor(x);
                    path = ["M", currentX + 0.5, y, "l", 0, -length];
                    trueLength = length - (gutters.lower + gutters.upper);

                    for (tick = 0; tick < stepCount; tick++) {
                        currentY = y - gutters.lower - (steps[tick] - steps[0]) * trueLength / axisRange;
                        path.push("M", currentX, Math.floor(currentY) + 0.5, "l", dashLength * 2, 0);

                        inflections.push([ currentX, Math.floor(currentY) ]);

                        if (calcLabels) {
                            me.labels.push(steps[tick]);
                        }
                    }
                } else {
                    currentY = Math.floor(y);
                    path = ["M", x, currentY + 0.5, "l", length, 0];
                    trueLength = length - (gutters.lower + gutters.upper);

                    for (tick = 0; tick < stepCount; tick++) {
                        currentX = x + gutters.lower + (steps[tick] - steps[0]) * trueLength / axisRange;
                        path.push("M", Math.floor(currentX) + 0.5, currentY, "l", 0, dashLength * 2 + 1);

                        inflections.push([ Math.floor(currentX), currentY ]);

                        if (calcLabels) {
                            me.labels.push(steps[tick]);
                        }
                    }
                }
            }

            // Draw the minor ticks

            // If 'minorTickSteps' is...
            // - A number: it contains the number of minor ticks between 2 major ticks.
            // - An array with 2 numbers: it contains a date interval like [Ext.Date.DAY,2].
            // - An array with a single number: it contains the value of a minor tick.
            subDashes = (verticalAxis ? subDashesY : subDashesX);
            if (Ext.isArray(subDashes)) {
                if (subDashes.length == 2) {
                    subDashValue = +Ext.Date.add(new Date(), subDashes[0], subDashes[1]) - Date.now();
                } else {
                    subDashValue = subDashes[0];
                }
            }
            else {
                if (Ext.isNumber(subDashes) && subDashes > 0) {
                    subDashValue = step / (subDashes + 1);
                }
            }

            if (gutters && subDashValue) {
                for (tick = 0; tick < stepCount - 1; tick++) {
                    begin = +steps[tick];
                    end = +steps[tick+1];
                    if (verticalAxis) {
                        for (value = begin + subDashValue; value < end; value += subDashValue) {
                            currentY = y - gutters.lower - (value - steps[0]) * trueLength / axisRange;
                            path.push("M", currentX, Math.floor(currentY) + 0.5, "l", dashLength, 0);
                        }
                    }
                    else {
                        for (value = begin + subDashValue; value < end; value += subDashValue) {
                            currentX = x + gutters.upper + (value - steps[0]) * trueLength / axisRange;
                            path.push("M", Math.floor(currentX) + 0.5, currentY, "l", 0, dashLength + 1);
                        }
                    }
                }
            }

            // Render

            if (!me.axis) {
                me.axis = me.chart.surface.add(Ext.apply({
                    type: 'path',
                    path: path
                }, me.axisStyle));
            }
            me.axis.setAttributes({
                path: path
            }, true);
            me.inflections = inflections;
            if (!init && me.grid) {
                me.drawGrid();
            }
            me.axisBBox = me.axis.getBBox();
            me.drawLabel();
        },

        /**
         * Renders an horizontal and/or vertical grid into the Surface.
         */
        drawGrid: function () {
            var me = this,
                surface = me.chart.surface,
                grid = me.grid,
                odd = grid.odd,
                even = grid.even,
                inflections = me.inflections,
                ln = inflections.length - ((odd || even) ? 0 : 1),
                position = me.position,
                maxGutters = me.chart.maxGutters,
                width = me.width - 2,
                point, prevPoint,
                i = 1,
                path = [], styles, lineWidth, dlineWidth,
                oddPath = [], evenPath = [];

            if (((maxGutters.bottom !== 0 || maxGutters.top !== 0) && (position == 'left' || position == 'right')) ||
                ((maxGutters.left !== 0 || maxGutters.right !== 0) && (position == 'top' || position == 'bottom'))) {
                i = 0;
                ln++;
            }
            for (; i < ln; i++) {
                point = inflections[i];
                prevPoint = inflections[i - 1];
                if (odd || even) {
                    path = (i % 2) ? oddPath : evenPath;
                    styles = ((i % 2) ? odd : even) || {};
                    lineWidth = (styles.lineWidth || styles['stroke-width'] || 0) / 2;
                    dlineWidth = 2 * lineWidth;
                    if (position == 'left') {
                        path.push("M", prevPoint[0] + 1 + lineWidth, prevPoint[1] + 0.5 - lineWidth,
                            "L", prevPoint[0] + 1 + width - lineWidth, prevPoint[1] + 0.5 - lineWidth,
                            "L", point[0] + 1 + width - lineWidth, point[1] + 0.5 + lineWidth,
                            "L", point[0] + 1 + lineWidth, point[1] + 0.5 + lineWidth, "Z");
                    }
                    else if (position == 'right') {
                        path.push("M", prevPoint[0] - lineWidth, prevPoint[1] + 0.5 - lineWidth,
                            "L", prevPoint[0] - width + lineWidth, prevPoint[1] + 0.5 - lineWidth,
                            "L", point[0] - width + lineWidth, point[1] + 0.5 + lineWidth,
                            "L", point[0] - lineWidth, point[1] + 0.5 + lineWidth, "Z");
                    }
                    else if (position == 'top') {
                        path.push("M", prevPoint[0] + 0.5 + lineWidth, prevPoint[1] + 1 + lineWidth,
                            "L", prevPoint[0] + 0.5 + lineWidth, prevPoint[1] + 1 + width - lineWidth,
                            "L", point[0] + 0.5 - lineWidth, point[1] + 1 + width - lineWidth,
                            "L", point[0] + 0.5 - lineWidth, point[1] + 1 + lineWidth, "Z");
                    }
                    else {
                        path.push("M", prevPoint[0] + 0.5 + lineWidth, prevPoint[1] - lineWidth,
                            "L", prevPoint[0] + 0.5 + lineWidth, prevPoint[1] - width + lineWidth,
                            "L", point[0] + 0.5 - lineWidth, point[1] - width + lineWidth,
                            "L", point[0] + 0.5 - lineWidth, point[1] - lineWidth, "Z");
                    }
                } else {
                    if (position == 'left') {
                        path = path.concat(["M", point[0] + 0.5, point[1] + 0.5, "l", width, 0]);
                    }
                    else if (position == 'right') {
                        path = path.concat(["M", point[0] - 0.5, point[1] + 0.5, "l", -width, 0]);
                    }
                    else if (position == 'top') {
                        path = path.concat(["M", point[0] + 0.5, point[1] + 0.5, "l", 0, width]);
                    }
                    else {
                        path = path.concat(["M", point[0] + 0.5, point[1] - 0.5, "l", 0, -width]);
                    }
                }
            }
            if (odd || even) {
                if (oddPath.length) {
                    if (!me.gridOdd && oddPath.length) {
                        me.gridOdd = surface.add({
                            type: 'path',
                            path: oddPath
                        });
                    }
                    me.gridOdd.setAttributes(Ext.apply({
                        path: oddPath,
                        hidden: false
                    }, odd || {}), true);
                }
                if (evenPath.length) {
                    if (!me.gridEven) {
                        me.gridEven = surface.add({
                            type: 'path',
                            path: evenPath
                        });
                    }
                    me.gridEven.setAttributes(Ext.apply({
                        path: evenPath,
                        hidden: false
                    }, even || {}), true);
                }
            }
            else {
                if (path.length) {
                    if (!me.gridLines) {
                        me.gridLines = me.chart.surface.add({
                            type: 'path',
                            path: path,
                            "stroke-width": me.lineWidth || 1,
                            stroke: me.gridColor || '#ccc'
                        });
                    }
                    me.gridLines.setAttributes({
                        hidden: false,
                        path: path
                    }, true);
                }
                else if (me.gridLines) {
                    me.gridLines.hide(true);
                }
            }
        },

        // @private
        getOrCreateLabel: function (i, text) {
            var me = this,
                labelGroup = me.labelGroup,
                textLabel = labelGroup.getAt(i),
                surface = me.chart.surface;
            if (textLabel) {
                if (text != textLabel.attr.text) {
                    textLabel.setAttributes(Ext.apply({
                        text: text
                    }, me.label), true);
                    textLabel._bbox = textLabel.getBBox();
                }
            }
            else {
                textLabel = surface.add(Ext.apply({
                    group: labelGroup,
                    type: 'text',
                    x: 0,
                    y: 0,
                    text: text
                }, me.label));
                surface.renderItem(textLabel);
                textLabel._bbox = textLabel.getBBox();
            }
            //get untransformed bounding box
            if (me.label.rotation) {
                textLabel.setAttributes({
                    rotation: {
                        degrees: 0
                    }
                }, true);
                textLabel._ubbox = textLabel.getBBox();
                textLabel.setAttributes(me.label, true);
            } else {
                textLabel._ubbox = textLabel._bbox;
            }
            return textLabel;
        },

        rect2pointArray: function (sprite) {
            var surface = this.chart.surface,
                rect = surface.getBBox(sprite, true),
                p1 = [rect.x, rect.y],
                p1p = p1.slice(),
                p2 = [rect.x + rect.width, rect.y],
                p2p = p2.slice(),
                p3 = [rect.x + rect.width, rect.y + rect.height],
                p3p = p3.slice(),
                p4 = [rect.x, rect.y + rect.height],
                p4p = p4.slice(),
                matrix = sprite.matrix;
            //transform the points
            p1[0] = matrix.x.apply(matrix, p1p);
            p1[1] = matrix.y.apply(matrix, p1p);

            p2[0] = matrix.x.apply(matrix, p2p);
            p2[1] = matrix.y.apply(matrix, p2p);

            p3[0] = matrix.x.apply(matrix, p3p);
            p3[1] = matrix.y.apply(matrix, p3p);

            p4[0] = matrix.x.apply(matrix, p4p);
            p4[1] = matrix.y.apply(matrix, p4p);
            return [p1, p2, p3, p4];
        },

        intersect: function (l1, l2) {
            var r1 = this.rect2pointArray(l1),
                r2 = this.rect2pointArray(l2);
            return !!Ext.draw.Draw.intersect(r1, r2).length;
        },

        drawHorizontalLabels: function () {
            var me = this,
                labelConf = me.label,
                floor = Math.floor,
                max = Math.max,
                axes = me.chart.axes,
                insetPadding = me.chart.insetPadding,
                gutters = me.chart.maxGutters,
                position = me.position,
                inflections = me.inflections,
                ln = inflections.length,
                labels = me.labels,
                maxHeight = 0,
                ratio,
                bbox, point, prevLabel, prevLabelId,
                adjustEnd = me.adjustEnd,
                hasLeft = axes.findIndex('position', 'left') != -1,
                hasRight = axes.findIndex('position', 'right') != -1,
                textLabel, text,
                last, x, y, i, firstLabel;

            last = ln - 1;
            //get a reference to the first text label dimensions
            point = inflections[0];
            firstLabel = me.getOrCreateLabel(0, me.label.renderer(labels[0]));
            ratio = Math.floor(Math.abs(Math.sin(labelConf.rotate && (labelConf.rotate.degrees * Math.PI / 180) || 0)));

            for (i = 0; i < ln; i++) {
                point = inflections[i];
                text = me.label.renderer(labels[i]);
                textLabel = me.getOrCreateLabel(i, text);
                bbox = textLabel._bbox;
                maxHeight = max(maxHeight, bbox.height + me.dashSize + me.label.padding);
                x = floor(point[0] - (ratio ? bbox.height : bbox.width) / 2);
                if (adjustEnd && gutters.left == 0 && gutters.right == 0) {
                    if (i == 0 && !hasLeft) {
                        x = point[0];
                    }
                    else if (i == last && !hasRight) {
                        x = Math.min(x, point[0] - bbox.width + insetPadding);
                    }
                }
                if (position == 'top') {
                    y = point[1] - (me.dashSize * 2) - me.label.padding - (bbox.height / 2);
                }
                else {
                    y = point[1] + (me.dashSize * 2) + me.label.padding + (bbox.height / 2);
                }

                textLabel.setAttributes({
                    hidden: false,
                    x: x,
                    y: y
                }, true);

                // Skip label if there isn't available minimum space
                if (i != 0 && (me.intersect(textLabel, prevLabel)
                    || me.intersect(textLabel, firstLabel))) {
                    if (i === last && prevLabelId !== 0) {
                        prevLabel.hide(true);
                    } else {
                        textLabel.hide(true);
                        continue;
                    }
                }

                prevLabel = textLabel;
                prevLabelId = i;
            }

            return maxHeight;
        },

        drawVerticalLabels: function () {
            var me = this,
                inflections = me.inflections,
                position = me.position,
                ln = inflections.length,
                chart = me.chart,
                insetPadding = chart.insetPadding,
                labels = me.labels,
                maxWidth = 0,
                max = Math.max,
                floor = Math.floor,
                ceil = Math.ceil,
                axes = me.chart.axes,
                gutters = me.chart.maxGutters,
                bbox, point, prevLabel, prevLabelId,
                hasTop = axes.findIndex('position', 'top') != -1,
                hasBottom = axes.findIndex('position', 'bottom') != -1,
                adjustEnd = me.adjustEnd,
                textLabel, text,
                last = ln - 1, x, y, i;

            for (i = 0; i < ln; i++) {
                point = inflections[i];
                text = me.label.renderer(labels[i]);
                textLabel = me.getOrCreateLabel(i, text);
                bbox = textLabel._bbox;

                maxWidth = max(maxWidth, bbox.width + me.dashSize + me.label.padding);
                y = point[1];
                if (adjustEnd && (gutters.bottom + gutters.top) < bbox.height / 2) {
                    if (i == last && !hasTop) {
                        y = Math.max(y, me.y - me.length + ceil(bbox.height / 2) - insetPadding);
                    }
                    else if (i == 0 && !hasBottom) {
                        y = me.y + gutters.bottom - floor(bbox.height / 2);
                    }
                }
                if (position == 'left') {
                    x = point[0] - bbox.width - me.dashSize - me.label.padding - 2;
                }
                else {
                    x = point[0] + me.dashSize + me.label.padding + 2;
                }
                textLabel.setAttributes(Ext.apply({
                    hidden: false,
                    x: x,
                    y: y
                }, me.label), true);
                // Skip label if there isn't available minimum space
                if (i != 0 && me.intersect(textLabel, prevLabel)) {
                    if (i === last && prevLabelId !== 0) {
                        prevLabel.hide(true);
                    } else {
                        textLabel.hide(true);
                        continue;
                    }
                }
                prevLabel = textLabel;
                prevLabelId = i;
            }

            return maxWidth;
        },

        /**
         * Renders the labels in the axes.
         */
        drawLabel: function () {
            var me = this,
                position = me.position,
                labelGroup = me.labelGroup,
                inflections = me.inflections,
                maxWidth = 0,
                maxHeight = 0,
                ln, i;

            if (position == 'left' || position == 'right') {
                maxWidth = me.drawVerticalLabels();
            } else {
                maxHeight = me.drawHorizontalLabels();
            }

            // Hide unused bars
            ln = labelGroup.getCount();
            i = inflections.length;
            for (; i < ln; i++) {
                labelGroup.getAt(i).hide(true);
            }

            me.bbox = {};
            Ext.apply(me.bbox, me.axisBBox);
            me.bbox.height = maxHeight;
            me.bbox.width = maxWidth;
            if (Ext.isString(me.title)) {
                me.drawTitle(maxWidth, maxHeight);
            }
        },

        /**
         * Updates the {@link #title} of this axis.
         * @param {String} title
         */
        setTitle: function (title) {
            this.title = title;
            this.drawLabel();
        },

        // @private draws the title for the axis.
        drawTitle: function (maxWidth, maxHeight) {
            var me = this,
                position = me.position,
                surface = me.chart.surface,
                displaySprite = me.displaySprite,
                title = me.title,
                rotate = (position == 'left' || position == 'right'),
                x = me.x,
                y = me.y,
                base, bbox, pad;

            if (displaySprite) {
                displaySprite.setAttributes({text: title}, true);
            } else {
                base = {
                    type: 'text',
                    x: 0,
                    y: 0,
                    text: title
                };
                displaySprite = me.displaySprite = surface.add(Ext.apply(base, me.axisTitleStyle, me.labelTitle));
                surface.renderItem(displaySprite);
            }
            bbox = displaySprite.getBBox();
            pad = me.dashSize + me.label.padding;

            if (rotate) {
                y -= ((me.length / 2) - (bbox.height / 2));
                if (position == 'left') {
                    x -= (maxWidth + pad + (bbox.width / 2));
                }
                else {
                    x += (maxWidth + pad + bbox.width - (bbox.width / 2));
                }
                me.bbox.width += bbox.width + 10;
            }
            else {
                x += (me.length / 2) - (bbox.width * 0.5);
                if (position == 'top') {
                    y -= (maxHeight + pad + (bbox.height * 0.3));
                }
                else {
                    y += (maxHeight + pad + (bbox.height * 0.8));
                }
                me.bbox.height += bbox.height + 10;
            }
            displaySprite.setAttributes({
                translate: {
                    x: x,
                    y: y
                }
            }, true);
        }
    });