/*
This file is part of Ext JS 4.2

Copyright (c) 2011-2013 Sencha Inc

Contact:  http://www.sencha.com/contact

Commercial Usage
Licensees holding valid commercial licenses may use this file in accordance with the Commercial
Software License Agreement provided with the Software or, alternatively, in accordance with the
terms contained in a written agreement between you and Sencha.

If you are unsure which license is appropriate for your use, please contact the sales department
at http://www.sencha.com/contact.

Build date: 2013-09-18 17:18:59 (940c324ac822b840618a3a8b2b4b873f83a1a9b1)
*/
/**
 * @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 = Ext.clone(firstSeries ? firstSeries.nullGutters : me.nullGutters),
            seriesGutters,
            hasGutters,
            sameDirectionGutters,
            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 the matching 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)) {
                seriesGutters = Ext.clone(series[i].getGutters());
                hasGutters = (seriesGutters.verticalAxis !== undefined);
                sameDirectionGutters = (hasGutters && (seriesGutters.verticalAxis == verticalAxis));
                if (hasGutters) {
                    if (!sameDirectionGutters) {
                        // 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) {
                            seriesGutters = { lower: padding.bottom, upper: padding.top, verticalAxis: true };
                        } else {
                            seriesGutters = { lower: padding.left, upper: padding.right, verticalAxis: false };
                        }
                    }
                    if (gutters.lower < seriesGutters.lower) {
                        gutters.lower = seriesGutters.lower;
                    }
                    if (gutters.upper < seriesGutters.upper) {
                        gutters.upper = seriesGutters.upper;
                    }
                    gutters.verticalAxis = verticalAxis;
                }
            }
        }

        // 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,
            reverse = me.reverse,
            textLabel, text, idx,
            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];
            idx = i;
            if (reverse) {
                idx = ln - i - 1;
            }
            text = me.label.renderer(labels[idx]);
            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);
    }
});
