source: branches/1888_OaaS/HeuristicLab.Services.Optimization.Web/Content/jqplot/src/jqplot.linearAxisRenderer.js @ 16115

/**
 * jqPlot
 * Pure JavaScript plotting plugin using jQuery
 *
 * Version: @VERSION
 *
 * Copyright (c) 2009-2011 Chris Leonello
 * jqPlot is currently available for use in all personal or commercial projects 
 * under both the MIT (http://www.opensource.org/licenses/mit-license.php) and GPL 
 * version 2.0 (http://www.gnu.org/licenses/gpl-2.0.html) licenses. This means that you can 
 * choose the license that best suits your project and use it accordingly. 
 *
 * Although not required, the author would appreciate an email letting him 
 * know of any substantial use of jqPlot.  You can reach the author at: 
 * chris at jqplot dot com or see http://www.jqplot.com/info.php .
 *
 * If you are feeling kind and generous, consider supporting the project by
 * making a donation at: http://www.jqplot.com/donate.php .
 *
 * sprintf functions contained in jqplot.sprintf.js by Ash Searle:
 *
 *     version 2007.04.27
 *     author Ash Searle
 *     http://hexmen.com/blog/2007/03/printf-sprintf/
 *     http://hexmen.com/js/sprintf.js
 *     The author (Ash Searle) has placed this code in the public domain:
 *     "This code is unrestricted: you are free to use it however you like."
 * 
 */
(function($) {
    // class: $.jqplot.LinearAxisRenderer
    // The default jqPlot axis renderer, creating a numeric axis.
    // The renderer has no additional options beyond the <Axis> object.
    $.jqplot.LinearAxisRenderer = function() {
    };
    
    // called with scope of axis object.
    $.jqplot.LinearAxisRenderer.prototype.init = function(options){
        // prop: breakPoints
        // EXPERIMENTAL!! Use at your own risk!
        // Works only with linear axes and the default tick renderer.
        // Array of [start, stop] points to create a broken axis.
        // Broken axes have a "jump" in them, which is an immediate 
        // transition from a smaller value to a larger value.
        // Currently, axis ticks MUST be manually assigned if using breakPoints
        // by using the axis ticks array option.
        this.breakPoints = null;
        // prop: breakTickLabel
        // Label to use at the axis break if breakPoints are specified.
        this.breakTickLabel = "&asymp;";
        // prop: forceTickAt0
        // This will ensure that there is always a tick mark at 0.
        // If data range is strictly positive or negative,
        // this will force 0 to be inside the axis bounds unless
        // the appropriate axis pad (pad, padMin or padMax) is set
        // to 0, then this will force an axis min or max value at 0.
        // This has know effect when any of the following options
        // are set:  autoscale, min, max, numberTicks or tickInterval.
        this.forceTickAt0 = false;
        // prop: forceTickAt100
        // This will ensure that there is always a tick mark at 100.
        // If data range is strictly above or below 100,
        // this will force 100 to be inside the axis bounds unless
        // the appropriate axis pad (pad, padMin or padMax) is set
        // to 0, then this will force an axis min or max value at 100.
        // This has know effect when any of the following options
        // are set:  autoscale, min, max, numberTicks or tickInterval.
        this.forceTickAt100 = false;
        this._autoFormatString = '';
        this._overrideFormatString = false;
        $.extend(true, this, options);
        if (this.breakPoints) {
            if (!$.isArray(this.breakPoints)) {
                this.breakPoints = null;
            }
            else if (this.breakPoints.length < 2 || this.breakPoints[1] <= this.breakPoints[0]) {
                this.breakPoints = null;
            }
        }
        this.resetDataBounds();
    };
    
    // called with scope of axis
    $.jqplot.LinearAxisRenderer.prototype.draw = function(ctx, plot) {
        if (this.show) {
            // populate the axis label and value properties.
            // createTicks is a method on the renderer, but
            // call it within the scope of the axis.
            this.renderer.createTicks.call(this);
            // fill a div with axes labels in the right direction.
            // Need to pregenerate each axis to get it's bounds and
            // position it and the labels correctly on the plot.
            var dim=0;
            var temp;
            // Added for theming.
            if (this._elem) {
                // Memory Leaks patch
                //this._elem.empty();
                this._elem.emptyForce();
                this._elem = null;
            }
            
            this._elem = $(document.createElement('div'));
            this._elem.addClass('jqplot-axis jqplot-'+this.name);
            this._elem.css('posiiton', 'absolute');

            
            if (this.name == 'xaxis' || this.name == 'x2axis') {
                this._elem.width(this._plotDimensions.width);
            }
            else {
                this._elem.height(this._plotDimensions.height);
            }
            
            // create a _label object.
            this.labelOptions.axis = this.name;
            this._label = new this.labelRenderer(this.labelOptions);
            if (this._label.show) {
                var elem = this._label.draw(ctx, plot);
                elem.appendTo(this._elem);
                elem = null;
            }
    
            var t = this._ticks;
            var tick;
            for (var i=0; i<t.length; i++) {
                tick = t[i];
                if (tick.show && tick.showLabel && (!tick.isMinorTick || this.showMinorTicks)) {
                    this._elem.append(tick.draw(ctx, plot));
                }
            }
            tick = null;
            t = null;
        }
        return this._elem;
    };
    
    // called with scope of an axis
    $.jqplot.LinearAxisRenderer.prototype.reset = function() {
        this.min = this._min;
        this.max = this._max;
        this.tickInterval = this._tickInterval;
        this.numberTicks = this._numberTicks;
        this._autoFormatString = '';
        if (this._overrideFormatString && this.tickOptions && this.tickOptions.formatString) {
            this.tickOptions.formatString = '';
        }

        // this._ticks = this.__ticks;
    };
    
    // called with scope of axis
    $.jqplot.LinearAxisRenderer.prototype.set = function() { 
        var dim = 0;
        var temp;
        var w = 0;
        var h = 0;
        var lshow = (this._label == null) ? false : this._label.show;
        if (this.show) {
            var t = this._ticks;
            var tick;
            for (var i=0; i<t.length; i++) {
                tick = t[i];
                if (!tick._breakTick && tick.show && tick.showLabel && (!tick.isMinorTick || this.showMinorTicks)) {
                    if (this.name == 'xaxis' || this.name == 'x2axis') {
                        temp = tick._elem.outerHeight(true);
                    }
                    else {
                        temp = tick._elem.outerWidth(true);
                    }
                    if (temp > dim) {
                        dim = temp;
                    }
                }
            }
            tick = null;
            t = null;
            
            if (lshow) {
                w = this._label._elem.outerWidth(true);
                h = this._label._elem.outerHeight(true); 
            }
            if (this.name == 'xaxis') {
                dim = dim + h;
                this._elem.css({'height':dim+'px', left:'0px', bottom:'0px'});
            }
            else if (this.name == 'x2axis') {
                dim = dim + h;
                this._elem.css({'height':dim+'px', left:'0px', top:'0px'});
            }
            else if (this.name == 'yaxis') {
                dim = dim + w;
                this._elem.css({'width':dim+'px', left:'0px', top:'0px'});
                if (lshow && this._label.constructor == $.jqplot.AxisLabelRenderer) {
                    this._label._elem.css('width', w+'px');
                }
            }
            else {
                dim = dim + w;
                this._elem.css({'width':dim+'px', right:'0px', top:'0px'});
                if (lshow && this._label.constructor == $.jqplot.AxisLabelRenderer) {
                    this._label._elem.css('width', w+'px');
                }
            }
        }  
    };    
    
    // called with scope of axis
    $.jqplot.LinearAxisRenderer.prototype.createTicks = function() {
        // we're are operating on an axis here
        var ticks = this._ticks;
        var userTicks = this.ticks;
        var name = this.name;
        // databounds were set on axis initialization.
        var db = this._dataBounds;
        var dim, interval;
        var min, max;
        var pos1, pos2;
        var tt, i;
        // get a copy of user's settings for min/max.
        var userMin = this.min;
        var userMax = this.max;
        var userNT = this.numberTicks;
        var userTI = this.tickInterval;
        
        // if we already have ticks, use them.
        // ticks must be in order of increasing value.
        
        if (userTicks.length) {
            // ticks could be 1D or 2D array of [val, val, ,,,] or [[val, label], [val, label], ...] or mixed
            for (i=0; i<userTicks.length; i++){
                var ut = userTicks[i];
                var t = new this.tickRenderer(this.tickOptions);
                if (ut.constructor == Array) {
                    t.value = ut[0];
                    if (this.breakPoints) {
                        if (ut[0] == this.breakPoints[0]) {
                            t.label = this.breakTickLabel;
                            t._breakTick = true;
                            t.showGridline = false;
                            t.showMark = false;
                        }
                        else if (ut[0] > this.breakPoints[0] && ut[0] <= this.breakPoints[1]) {
                            t.show = false;
                            t.showGridline = false;
                            t.label = ut[1];
                        }
                        else {
                            t.label = ut[1];
                        }
                    }
                    else {
                        t.label = ut[1];
                    }
                    t.setTick(ut[0], this.name);
                    this._ticks.push(t);
                }
                
                else {
                    t.value = ut;
                    if (this.breakPoints) {
                        if (ut == this.breakPoints[0]) {
                            t.label = this.breakTickLabel;
                            t._breakTick = true;
                            t.showGridline = false;
                            t.showMark = false;
                        }
                        else if (ut > this.breakPoints[0] && ut <= this.breakPoints[1]) {
                            t.show = false;
                            t.showGridline = false;
                        }
                    }
                    t.setTick(ut, this.name);
                    this._ticks.push(t);
                }
            }
            this.numberTicks = userTicks.length;
            this.min = this._ticks[0].value;
            this.max = this._ticks[this.numberTicks-1].value;
            this.tickInterval = (this.max - this.min) / (this.numberTicks - 1);
        }
        
        // we don't have any ticks yet, let's make some!
        else {
            if (name == 'xaxis' || name == 'x2axis') {
                dim = this._plotDimensions.width;
            }
            else {
                dim = this._plotDimensions.height;
            }
            
            // // if min, max and number of ticks specified, user can't specify interval.
            // if (!this.autoscale && this.min != null && this.max != null && this.numberTicks != null) {
            //     console.log('doing this');
            //     this.tickInterval = null;
            // }
            
            // if max, min, and interval specified and interval won't fit, ignore interval.
            // if (this.min != null && this.max != null && this.tickInterval != null) {
            //     if (parseInt((this.max-this.min)/this.tickInterval, 10) != (this.max-this.min)/this.tickInterval) {
            //         this.tickInterval = null;
            //     }
            // }
        
            min = ((this.min != null) ? this.min : db.min);
            max = ((this.max != null) ? this.max : db.max);

            var range = max - min;
            var rmin, rmax;
            var temp;

            // Doing complete autoscaling
            if (this.min == null && this.max == null && this.numberTicks == null && this.tickInterval == null && !this.autoscale) {
                // check to see if we can override tick format string with autocalculated one
                if (this.tickOptions == null || !this.tickOptions.formatString) {
                    this._overrideFormatString = true;
                }


                // Check if user must have tick at 0 or 100 and ensure they are in range.
                // The autoscaling algorithm will always place ticks at 0 and 100 if they are in range.
                if (this.forceTickAt0) {
                    if (min > 0) {
                        min = 0;
                    }
                    if (max < 0) {
                        max = 0;
                    }
                }

                if (this.forceTickAt100) {
                    if (min > 100) {
                        min = 100;
                    }
                    if (max < 100) {
                        max = 100;
                    }
                }

                // console.log(this.name);
                var threshold = 30;
                var tdim = Math.max(dim, threshold+1);
                var scalefact =  (tdim-threshold)/300.0;
                // scalefact = 1;
                var ret = $.jqplot.LinearTickGenerator(min, max, scalefact); 
                // calculate a padded max and min, points should be less than these
                // so that they aren't too close to the edges of the plot.
                // User can adjust how much padding is allowed with pad, padMin and PadMax options. 
                var tumin = min + range*(this.padMin - 1);
                var tumax = max - range*(this.padMax - 1);

                if (min <=tumin || max >= tumax) {
                    tumin = min - range*(this.padMin - 1);
                    tumax = max + range*(this.padMax - 1);
                    ret = $.jqplot.LinearTickGenerator(tumin, tumax, scalefact);
                }


                // if (ret[2] > max_number_ticks) {
                //     ret[4] = Math.ceil(r[2]/max_number_ticks) * ret[4];
                    
                // }

                this.min = ret[0];
                this.max = ret[1];
                this.numberTicks = ret[2];
                this._autoFormatString = ret[3];
                //this.tickInterval = Math.abs(this.max - this.min)/(this.numberTicks - 1);
                this.tickInterval = ret[4];
                // console.log('numberticks: %s, interval: %s', ret[2], ret[4]);
            }

            // User has specified some axis scale related option, can use auto algorithm
            else {
                
                // if min and max are same, space them out a bit
                if (min == max) {
                    var adj = 0.05;
                    if (min > 0) {
                        adj = Math.max(Math.log(min)/Math.LN10, 0.05);
                    }
                    min -= adj;
                    max += adj;
                }
                
                // autoscale.  Can't autoscale if min or max is supplied.
                // Will use numberTicks and tickInterval if supplied.  Ticks
                // across multiple axes may not line up depending on how
                // bars are to be plotted.
                if (this.autoscale && this.min == null && this.max == null) {
                    var rrange, ti, margin;
                    var forceMinZero = false;
                    var forceZeroLine = false;
                    var intervals = {min:null, max:null, average:null, stddev:null};
                    // if any series are bars, or if any are fill to zero, and if this
                    // is the axis to fill toward, check to see if we can start axis at zero.
                    for (var i=0; i<this._series.length; i++) {
                        var s = this._series[i];
                        var faname = (s.fillAxis == 'x') ? s._xaxis.name : s._yaxis.name;
                        // check to see if this is the fill axis
                        if (this.name == faname) {
                            var vals = s._plotValues[s.fillAxis];
                            var vmin = vals[0];
                            var vmax = vals[0];
                            for (var j=1; j<vals.length; j++) {
                                if (vals[j] < vmin) {
                                    vmin = vals[j];
                                }
                                else if (vals[j] > vmax) {
                                    vmax = vals[j];
                                }
                            }
                            var dp = (vmax - vmin) / vmax;
                            // is this sries a bar?
                            if (s.renderer.constructor == $.jqplot.BarRenderer) {
                                // if no negative values and could also check range.
                                if (vmin >= 0 && (s.fillToZero || dp > 0.1)) {
                                    forceMinZero = true;
                                }
                                else {
                                    forceMinZero = false;
                                    if (s.fill && s.fillToZero && vmin < 0 && vmax > 0) {
                                        forceZeroLine = true;
                                    }
                                    else {
                                        forceZeroLine = false;
                                    }
                                }
                            }
                            
                            // if not a bar and filling, use appropriate method.
                            else if (s.fill) {
                                if (vmin >= 0 && (s.fillToZero || dp > 0.1)) {
                                    forceMinZero = true;
                                }
                                else if (vmin < 0 && vmax > 0 && s.fillToZero) {
                                    forceMinZero = false;
                                    forceZeroLine = true;
                                }
                                else {
                                    forceMinZero = false;
                                    forceZeroLine = false;
                                }
                            }
                            
                            // if not a bar and not filling, only change existing state
                            // if it doesn't make sense
                            else if (vmin < 0) {
                                forceMinZero = false;
                            }
                        }
                    }
                    
                    // check if we need make axis min at 0.
                    if (forceMinZero) {
                        // compute number of ticks
                        this.numberTicks = 2 + Math.ceil((dim-(this.tickSpacing-1))/this.tickSpacing);
                        this.min = 0;
                        userMin = 0;
                        // what order is this range?
                        // what tick interval does that give us?
                        ti = max/(this.numberTicks-1);
                        temp = Math.pow(10, Math.abs(Math.floor(Math.log(ti)/Math.LN10)));
                        if (ti/temp == parseInt(ti/temp, 10)) {
                            ti += temp;
                        }
                        this.tickInterval = Math.ceil(ti/temp) * temp;
                        this.max = this.tickInterval * (this.numberTicks - 1);
                    }
                    
                    // check if we need to make sure there is a tick at 0.
                    else if (forceZeroLine) {
                        // compute number of ticks
                        this.numberTicks = 2 + Math.ceil((dim-(this.tickSpacing-1))/this.tickSpacing);
                        var ntmin = Math.ceil(Math.abs(min)/range*(this.numberTicks-1));
                        var ntmax = this.numberTicks - 1  - ntmin;
                        ti = Math.max(Math.abs(min/ntmin), Math.abs(max/ntmax));
                        temp = Math.pow(10, Math.abs(Math.floor(Math.log(ti)/Math.LN10)));
                        this.tickInterval = Math.ceil(ti/temp) * temp;
                        this.max = this.tickInterval * ntmax;
                        this.min = -this.tickInterval * ntmin;
                    }
                    
                    // if nothing else, do autoscaling which will try to line up ticks across axes.
                    else {  
                        if (this.numberTicks == null){
                            if (this.tickInterval) {
                                this.numberTicks = 3 + Math.ceil(range / this.tickInterval);
                            }
                            else {
                                this.numberTicks = 2 + Math.ceil((dim-(this.tickSpacing-1))/this.tickSpacing);
                            }
                        }
                
                        if (this.tickInterval == null) {
                            // get a tick interval
                            ti = range/(this.numberTicks - 1);

                            if (ti < 1) {
                                temp = Math.pow(10, Math.abs(Math.floor(Math.log(ti)/Math.LN10)));
                            }
                            else {
                                temp = 1;
                            }
                            this.tickInterval = Math.ceil(ti*temp*this.pad)/temp;
                        }
                        else {
                            temp = 1 / this.tickInterval;
                        }
                        
                        // try to compute a nicer, more even tick interval
                        // temp = Math.pow(10, Math.floor(Math.log(ti)/Math.LN10));
                        // this.tickInterval = Math.ceil(ti/temp) * temp;
                        rrange = this.tickInterval * (this.numberTicks - 1);
                        margin = (rrange - range)/2;
           
                        if (this.min == null) {
                            this.min = Math.floor(temp*(min-margin))/temp;
                        }
                        if (this.max == null) {
                            this.max = this.min + rrange;
                        }
                    }
                }
                
                // Use the default algorithm which pads each axis to make the chart
                // centered nicely on the grid.
                else {
                    rmin = (this.min != null) ? this.min : min - range*(this.padMin - 1);
                    rmax = (this.max != null) ? this.max : max + range*(this.padMax - 1);
                    this.min = rmin;
                    this.max = rmax;
                    range = this.max - this.min;
        
                    if (this.numberTicks == null){
                        // if tickInterval is specified by user, we will ignore computed maximum.
                        // max will be equal or greater to fit even # of ticks.
                        if (this.tickInterval != null) {
                            this.numberTicks = Math.ceil((this.max - this.min)/this.tickInterval)+1;
                            this.max = this.min + this.tickInterval*(this.numberTicks-1);
                        }
                        else if (dim > 100) {
                            this.numberTicks = parseInt(3+(dim-100)/75, 10);
                        }
                        else {
                            this.numberTicks = 2;
                        }
                    }
                
                    if (this.tickInterval == null) {
                        this.tickInterval = range / (this.numberTicks-1);
                    }
                }
                
                if (this.renderer.constructor == $.jqplot.LinearAxisRenderer && this._autoFormatString == '') {
                    // fix for misleading tick display with small range and low precision.
                    range = this.max - this.min;
                    // figure out precision
                    var temptick = new this.tickRenderer(this.tickOptions);
                    // use the tick formatString or, the default.
                    var fs = temptick.formatString || $.jqplot.config.defaultTickFormatString; 
                    var fs = fs.match($.jqplot.sprintf.regex)[0];
                    var precision = 0;
                    if (fs) {
                        if (fs.search(/[fFeEgGpP]/) > -1) {
                            var m = fs.match(/\%\.(\d{0,})?[eEfFgGpP]/);
                            if (m) {
                                precision = parseInt(m[1], 10);
                            }
                            else {
                                precision = 6;
                            }
                        }
                        else if (fs.search(/[di]/) > -1) {
                            precision = 0;
                        }
                        // fact will be <= 1;
                        var fact = Math.pow(10, -precision);
                        if (this.tickInterval < fact) {
                            // need to correct underrange
                            if (userNT == null && userTI == null) {
                                this.tickInterval = fact;
                                if (userMax == null && userMin == null) {
                                    // this.min = Math.floor((this._dataBounds.min - this.tickInterval)/fact) * fact;
                                    this.min = Math.floor(this._dataBounds.min/fact) * fact;
                                    if (this.min == this._dataBounds.min) {
                                        this.min = this._dataBounds.min - this.tickInterval;
                                    }
                                    // this.max = Math.ceil((this._dataBounds.max + this.tickInterval)/fact) * fact;
                                    this.max = Math.ceil(this._dataBounds.max/fact) * fact;
                                    if (this.max == this._dataBounds.max) {
                                        this.max = this._dataBounds.max + this.tickInterval;
                                    }
                                    var n = (this.max - this.min)/this.tickInterval;
                                    n = n.toFixed(11);
                                    n = Math.ceil(n);
                                    this.numberTicks = n + 1;
                                }
                                else if (userMax == null) {
                                    // add one tick for top of range.
                                    var n = (this._dataBounds.max - this.min) / this.tickInterval;
                                    n = n.toFixed(11);
                                    this.numberTicks = Math.ceil(n) + 2;
                                    this.max = this.min + this.tickInterval * (this.numberTicks-1);
                                }
                                else if (userMin == null) {
                                    // add one tick for bottom of range.
                                    var n = (this.max - this._dataBounds.min) / this.tickInterval;
                                    n = n.toFixed(11);
                                    this.numberTicks = Math.ceil(n) + 2;
                                    this.min = this.max - this.tickInterval * (this.numberTicks-1);
                                }
                                else {
                                    // calculate a number of ticks so max is within axis scale
                                    this.numberTicks = Math.ceil((userMax - userMin)/this.tickInterval) + 1;
                                    // if user's min and max don't fit evenly in ticks, adjust.
                                    // This takes care of cases such as user min set to 0, max set to 3.5 but tick
                                    // format string set to %d (integer ticks)
                                    this.min =  Math.floor(userMin*Math.pow(10, precision))/Math.pow(10, precision);
                                    this.max =  Math.ceil(userMax*Math.pow(10, precision))/Math.pow(10, precision);
                                    // this.max = this.min + this.tickInterval*(this.numberTicks-1);
                                    this.numberTicks = Math.ceil((this.max - this.min)/this.tickInterval) + 1;
                                }
                            }
                        }
                    }
                }
                
            }
            
            if (this._overrideFormatString && this._autoFormatString != '') {
                this.tickOptions = this.tickOptions || {};
                this.tickOptions.formatString = this._autoFormatString;
            }

            for (var i=0; i<this.numberTicks; i++){
                tt = this.min + i * this.tickInterval;
                var t = new this.tickRenderer(this.tickOptions);
                // var t = new $.jqplot.AxisTickRenderer(this.tickOptions);

                t.setTick(tt, this.name);
                this._ticks.push(t);
                t = null;
            }
        }
        ticks = null;
    };
    
    // Used to reset just the values of the ticks and then repack, which will
    // recalculate the positioning functions.  It is assuemd that the 
    // number of ticks is the same and the values of the new array are at the
    // proper interval.
    // This method needs to be called with the scope of an axis object, like:
    //
    // > plot.axes.yaxis.renderer.resetTickValues.call(plot.axes.yaxis, yarr);
    //
    $.jqplot.LinearAxisRenderer.prototype.resetTickValues = function(opts) {
        if ($.isArray(opts) && opts.length == this._ticks.length) {
            var t;
            for (var i=0; i<opts.length; i++) {
                t = this._ticks[i];
                t.value = opts[i];
                t.label = t.formatter(t.formatString, opts[i]);
                t.label = t.prefix + t.label;
                t._elem.html(t.label);
            }
            t = null;
            this.min = $.jqplot.arrayMin(opts);
            this.max = $.jqplot.arrayMax(opts);
            this.pack();
        }
        // Not implemented yet.
        // else if ($.isPlainObject(opts)) {
        // 
        // }
    };
    
    // called with scope of axis
    $.jqplot.LinearAxisRenderer.prototype.pack = function(pos, offsets) {
        // Add defaults for repacking from resetTickValues function.
        pos = pos || {};
        offsets = offsets || this._offsets;
        
        var ticks = this._ticks;
        var max = this.max;
        var min = this.min;
        var offmax = offsets.max;
        var offmin = offsets.min;
        var lshow = (this._label == null) ? false : this._label.show;
        
        for (var p in pos) {
            this._elem.css(p, pos[p]);
        }
        
        this._offsets = offsets;
        // pixellength will be + for x axes and - for y axes becasue pixels always measured from top left.
        var pixellength = offmax - offmin;
        var unitlength = max - min;
        
        // point to unit and unit to point conversions references to Plot DOM element top left corner.
        if (this.breakPoints) {
            unitlength = unitlength - this.breakPoints[1] + this.breakPoints[0];
            
            this.p2u = function(p){
                return (p - offmin) * unitlength / pixellength + min;
            };
        
            this.u2p = function(u){
                if (u > this.breakPoints[0] && u < this.breakPoints[1]){
                    u = this.breakPoints[0];
                }
                if (u <= this.breakPoints[0]) {
                    return (u - min) * pixellength / unitlength + offmin;
                }
                else {
                    return (u - this.breakPoints[1] + this.breakPoints[0] - min) * pixellength / unitlength + offmin;
                }
            };
                
            if (this.name.charAt(0) == 'x'){
                this.series_u2p = function(u){
                    if (u > this.breakPoints[0] && u < this.breakPoints[1]){
                        u = this.breakPoints[0];
                    }
                    if (u <= this.breakPoints[0]) {
                        return (u - min) * pixellength / unitlength;
                    }
                    else {
                        return (u - this.breakPoints[1] + this.breakPoints[0] - min) * pixellength / unitlength;
                    }
                };
                this.series_p2u = function(p){
                    return p * unitlength / pixellength + min;
                };
            }
        
            else {
                this.series_u2p = function(u){
                    if (u > this.breakPoints[0] && u < this.breakPoints[1]){
                        u = this.breakPoints[0];
                    }
                    if (u >= this.breakPoints[1]) {
                        return (u - max) * pixellength / unitlength;
                    }
                    else {
                        return (u + this.breakPoints[1] - this.breakPoints[0] - max) * pixellength / unitlength;
                    }
                };
                this.series_p2u = function(p){
                    return p * unitlength / pixellength + max;
                };
            }
        }
        else {
            this.p2u = function(p){
                return (p - offmin) * unitlength / pixellength + min;
            };
        
            this.u2p = function(u){
                return (u - min) * pixellength / unitlength + offmin;
            };
                
            if (this.name == 'xaxis' || this.name == 'x2axis'){
                this.series_u2p = function(u){
                    return (u - min) * pixellength / unitlength;
                };
                this.series_p2u = function(p){
                    return p * unitlength / pixellength + min;
                };
            }
        
            else {
                this.series_u2p = function(u){
                    return (u - max) * pixellength / unitlength;
                };
                this.series_p2u = function(p){
                    return p * unitlength / pixellength + max;
                };
            }
        }
        
        if (this.show) {
            if (this.name == 'xaxis' || this.name == 'x2axis') {
                for (var i=0; i<ticks.length; i++) {
                    var t = ticks[i];
                    if (t.show && t.showLabel) {
                        var shim;
                        
                        if (t.constructor == $.jqplot.CanvasAxisTickRenderer && t.angle) {
                            // will need to adjust auto positioning based on which axis this is.
                            var temp = (this.name == 'xaxis') ? 1 : -1;
                            switch (t.labelPosition) {
                                case 'auto':
                                    // position at end
                                    if (temp * t.angle < 0) {
                                        shim = -t.getWidth() + t._textRenderer.height * Math.sin(-t._textRenderer.angle) / 2;
                                    }
                                    // position at start
                                    else {
                                        shim = -t._textRenderer.height * Math.sin(t._textRenderer.angle) / 2;
                                    }
                                    break;
                                case 'end':
                                    shim = -t.getWidth() + t._textRenderer.height * Math.sin(-t._textRenderer.angle) / 2;
                                    break;
                                case 'start':
                                    shim = -t._textRenderer.height * Math.sin(t._textRenderer.angle) / 2;
                                    break;
                                case 'middle':
                                    shim = -t.getWidth()/2 + t._textRenderer.height * Math.sin(-t._textRenderer.angle) / 2;
                                    break;
                                default:
                                    shim = -t.getWidth()/2 + t._textRenderer.height * Math.sin(-t._textRenderer.angle) / 2;
                                    break;
                            }
                        }
                        else {
                            shim = -t.getWidth()/2;
                        }
                        var val = this.u2p(t.value) + shim + 'px';
                        t._elem.css('left', val);
                        t.pack();
                    }
                }
                if (lshow) {
                    var w = this._label._elem.outerWidth(true);
                    this._label._elem.css('left', offmin + pixellength/2 - w/2 + 'px');
                    if (this.name == 'xaxis') {
                        this._label._elem.css('bottom', '0px');
                    }
                    else {
                        this._label._elem.css('top', '0px');
                    }
                    this._label.pack();
                }
            }
            else {
                for (var i=0; i<ticks.length; i++) {
                    var t = ticks[i];
                    if (t.show && t.showLabel) {                        
                        var shim;
                        if (t.constructor == $.jqplot.CanvasAxisTickRenderer && t.angle) {
                            // will need to adjust auto positioning based on which axis this is.
                            var temp = (this.name == 'yaxis') ? 1 : -1;
                            switch (t.labelPosition) {
                                case 'auto':
                                    // position at end
                                case 'end':
                                    if (temp * t.angle < 0) {
                                        shim = -t._textRenderer.height * Math.cos(-t._textRenderer.angle) / 2;
                                    }
                                    else {
                                        shim = -t.getHeight() + t._textRenderer.height * Math.cos(t._textRenderer.angle) / 2;
                                    }
                                    break;
                                case 'start':
                                    if (t.angle > 0) {
                                        shim = -t._textRenderer.height * Math.cos(-t._textRenderer.angle) / 2;
                                    }
                                    else {
                                        shim = -t.getHeight() + t._textRenderer.height * Math.cos(t._textRenderer.angle) / 2;
                                    }
                                    break;
                                case 'middle':
                                    // if (t.angle > 0) {
                                    //     shim = -t.getHeight()/2 + t._textRenderer.height * Math.sin(-t._textRenderer.angle) / 2;
                                    // }
                                    // else {
                                    //     shim = -t.getHeight()/2 - t._textRenderer.height * Math.sin(t._textRenderer.angle) / 2;
                                    // }
                                    shim = -t.getHeight()/2;
                                    break;
                                default:
                                    shim = -t.getHeight()/2;
                                    break;
                            }
                        }
                        else {
                            shim = -t.getHeight()/2;
                        }
                        
                        var val = this.u2p(t.value) + shim + 'px';
                        t._elem.css('top', val);
                        t.pack();
                    }
                }
                if (lshow) {
                    var h = this._label._elem.outerHeight(true);
                    this._label._elem.css('top', offmax - pixellength/2 - h/2 + 'px');
                    if (this.name == 'yaxis') {
                        this._label._elem.css('left', '0px');
                    }
                    else {
                        this._label._elem.css('right', '0px');
                    }   
                    this._label.pack();
                }
            }
        }

        ticks = null;
    };
})(jQuery);