Upgrade to ExtJS 4.0.0 - Released 04/26/2011
[extjs.git] / docs / source / Axis.html
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+<!DOCTYPE html><html><head><title>Sencha Documentation Project</title><link rel="stylesheet" href="../reset.css" type="text/css"><link rel="stylesheet" href="../prettify.css" type="text/css"><link rel="stylesheet" href="../prettify_sa.css" type="text/css"><script type="text/javascript" src="../prettify.js"></script></head><body onload="prettyPrint()"><pre class="prettyprint"><pre><span id='Ext-chart.axis.Axis'>/**
+</span> * @class Ext.chart.axis.Axis
+ * @extends Ext.chart.axis.Abstract
+ * 
+ * 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',
+ *         grid: true,
+ *         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 */
+
+<span id='Ext-chart.axis.Axis-cfg-majorTickSteps'>    /**
+</span>     * @cfg {Number} majorTickSteps 
+     * If `minimum` and `maximum` are specified it forces the number of major ticks to the specified value.
+     */
+
+<span id='Ext-chart.axis.Axis-cfg-minorTickSteps'>    /**
+</span>     * @cfg {Number} minorTickSteps 
+     * The number of small ticks between two major ticks. Default is zero.
+     */
+
+<span id='Ext-chart.axis.Axis-cfg-dashSize'>    /**
+</span>     * @cfg {Number} dashSize 
+     * The size of the dash marker. Default's 3.
+     */
+    dashSize: 3,
+    
+<span id='Ext-chart.axis.Axis-cfg-position'>    /**
+</span>     * @cfg {String} position
+     * Where to set the axis. Available options are `left`, `bottom`, `right`, `top`. Default's `bottom`.
+     */
+    position: 'bottom',
+    
+    // @private
+    skipFirst: false,
+    
+<span id='Ext-chart.axis.Axis-cfg-length'>    /**
+</span>     * @cfg {Number} length
+     * Offset axis position. Default's 0.
+     */
+    length: 0,
+    
+<span id='Ext-chart.axis.Axis-cfg-width'>    /**
+</span>     * @cfg {Number} width
+     * Offset axis width. Default's 0.
+     */
+    width: 0,
+    
+    majorTickSteps: false,
+
+    // @private
+    applyData: Ext.emptyFn,
+
+    // @private creates a structure with start, end and step points.
+    calcEnds: function() {
+        var me = this,
+            math = Math,
+            mmax = math.max,
+            mmin = math.min,
+            store = me.chart.substore || me.chart.store,
+            series = me.chart.series.items,
+            fields = me.fields,
+            ln = fields.length,
+            min = isNaN(me.minimum) ? Infinity : me.minimum,
+            max = isNaN(me.maximum) ? -Infinity : me.maximum,
+            prevMin = me.prevMin,
+            prevMax = me.prevMax,
+            aggregate = false,
+            total = 0,
+            excludes = [],
+            outfrom, outto,
+            i, l, values, rec, out;
+
+        //if one series is stacked I have to aggregate the values
+        //for the scale.
+        for (i = 0, l = series.length; !aggregate &amp;&amp; i &lt; l; i++) {
+            aggregate = aggregate || series[i].stacked;
+            excludes = series[i].__excludes || excludes;
+        }
+        store.each(function(record) {
+            if (aggregate) {
+                if (!isFinite(min)) {
+                    min = 0;
+                }
+                for (values = [0, 0], i = 0; i &lt; ln; i++) {
+                    if (excludes[i]) {
+                        continue;
+                    }
+                    rec = record.get(fields[i]);
+                    values[+(rec &gt; 0)] += math.abs(rec);
+                }
+                max = mmax(max, -values[0], values[1]);
+                min = mmin(min, -values[0], values[1]);
+            }
+            else {
+                for (i = 0; i &lt; ln; i++) {
+                    if (excludes[i]) {
+                        continue;
+                    }
+                    value = record.get(fields[i]);
+                    max = mmax(max, value);
+                    min = mmin(min, value);
+                }
+            }
+        });
+        if (!isFinite(max)) {
+            max = me.prevMax || 0;
+        }
+        if (!isFinite(min)) {
+            min = me.prevMin || 0;
+        }
+        //normalize min max for snapEnds.
+        if (min != max &amp;&amp; (max != (max &gt;&gt; 0))) {
+            max = (max &gt;&gt; 0) + 1;
+        }
+        out = Ext.draw.Draw.snapEnds(min, max, me.majorTickSteps !== false ?  (me.majorTickSteps +1) : me.steps);
+        outfrom = out.from;
+        outto = out.to;
+        if (!isNaN(me.maximum)) {
+            //TODO(nico) users are responsible for their own minimum/maximum values set.
+            //Clipping should be added to remove lines in the chart which are below the axis.
+            out.to = me.maximum;
+        }
+        if (!isNaN(me.minimum)) {
+            //TODO(nico) users are responsible for their own minimum/maximum values set.
+            //Clipping should be added to remove lines in the chart which are below the axis.
+            out.from = me.minimum;
+        }
+        
+        //Adjust after adjusting minimum and maximum
+        out.step = (out.to - out.from) / (outto - outfrom) * out.step;
+        
+        if (me.adjustMaximumByMajorUnit) {
+            out.to += out.step;
+        }
+        if (me.adjustMinimumByMajorUnit) {
+            out.from -= out.step;
+        }
+        me.prevMin = min == max? 0 : min;
+        me.prevMax = max;
+        return out;
+    },
+
+<span id='Ext-chart.axis.Axis-method-drawAxis'>    /**
+</span>     * Renders the axis into the screen and updates it's position.
+     */
+    drawAxis: function (init) {
+        var me = this,
+            i, j,
+            x = me.x,
+            y = me.y,
+            gutterX = me.chart.maxGutter[0],
+            gutterY = me.chart.maxGutter[1],
+            dashSize = me.dashSize,
+            subDashesX = me.minorTickSteps || 0,
+            subDashesY = me.minorTickSteps || 0,
+            length = me.length,
+            position = me.position,
+            inflections = [],
+            calcLabels = false,
+            stepCalcs = me.applyData(),
+            step = stepCalcs.step,
+            steps = stepCalcs.steps,
+            from = stepCalcs.from,
+            to = stepCalcs.to,
+            trueLength,
+            currentX,
+            currentY,
+            path,
+            prev,
+            dashesX,
+            dashesY,
+            delta;
+        
+        //If no steps are specified
+        //then don't draw the axis. This generally happens
+        //when an empty store.
+        if (me.hidden || isNaN(step) || (from == to)) {
+            return;
+        }
+
+        me.from = stepCalcs.from;
+        me.to = stepCalcs.to;
+        if (position == 'left' || position == 'right') {
+            currentX = Math.floor(x) + 0.5;
+            path = [&quot;M&quot;, currentX, y, &quot;l&quot;, 0, -length];
+            trueLength = length - (gutterY * 2);
+        }
+        else {
+            currentY = Math.floor(y) + 0.5;
+            path = [&quot;M&quot;, x, currentY, &quot;l&quot;, length, 0];
+            trueLength = length - (gutterX * 2);
+        }
+        
+        delta = trueLength / (steps || 1);
+        dashesX = Math.max(subDashesX +1, 0);
+        dashesY = Math.max(subDashesY +1, 0);
+        if (me.type == 'Numeric') {
+            calcLabels = true;
+            me.labels = [stepCalcs.from];
+        }
+        if (position == 'right' || position == 'left') {
+            currentY = y - gutterY;
+            currentX = x - ((position == 'left') * dashSize * 2);
+            while (currentY &gt;= y - gutterY - trueLength) {
+                path.push(&quot;M&quot;, currentX, Math.floor(currentY) + 0.5, &quot;l&quot;, dashSize * 2 + 1, 0);
+                if (currentY != y - gutterY) {
+                    for (i = 1; i &lt; dashesY; i++) {
+                        path.push(&quot;M&quot;, currentX + dashSize, Math.floor(currentY + delta * i / dashesY) + 0.5, &quot;l&quot;, dashSize + 1, 0);
+                    }
+                }
+                inflections.push([ Math.floor(x), Math.floor(currentY) ]);
+                currentY -= delta;
+                if (calcLabels) {
+                    me.labels.push(me.labels[me.labels.length -1] + step);
+                }
+                if (delta === 0) {
+                    break;
+                }
+            }
+            if (Math.round(currentY + delta - (y - gutterY - trueLength))) {
+                path.push(&quot;M&quot;, currentX, Math.floor(y - length + gutterY) + 0.5, &quot;l&quot;, dashSize * 2 + 1, 0);
+                for (i = 1; i &lt; dashesY; i++) {
+                    path.push(&quot;M&quot;, currentX + dashSize, Math.floor(y - length + gutterY + delta * i / dashesY) + 0.5, &quot;l&quot;, dashSize + 1, 0);
+                }
+                inflections.push([ Math.floor(x), Math.floor(currentY) ]);
+                if (calcLabels) {
+                    me.labels.push(me.labels[me.labels.length -1] + step);
+                }
+            }
+        } else {
+            currentX = x + gutterX;
+            currentY = y - ((position == 'top') * dashSize * 2);
+            while (currentX &lt;= x + gutterX + trueLength) {
+                path.push(&quot;M&quot;, Math.floor(currentX) + 0.5, currentY, &quot;l&quot;, 0, dashSize * 2 + 1);
+                if (currentX != x + gutterX) {
+                    for (i = 1; i &lt; dashesX; i++) {
+                        path.push(&quot;M&quot;, Math.floor(currentX - delta * i / dashesX) + 0.5, currentY, &quot;l&quot;, 0, dashSize + 1);
+                    }
+                }
+                inflections.push([ Math.floor(currentX), Math.floor(y) ]);
+                currentX += delta;
+                if (calcLabels) {
+                    me.labels.push(me.labels[me.labels.length -1] + step);
+                }
+                if (delta === 0) {
+                    break;
+                }
+            }
+            if (Math.round(currentX - delta - (x + gutterX + trueLength))) {
+                path.push(&quot;M&quot;, Math.floor(x + length - gutterX) + 0.5, currentY, &quot;l&quot;, 0, dashSize * 2 + 1);
+                for (i = 1; i &lt; dashesX; i++) {
+                    path.push(&quot;M&quot;, Math.floor(x + length - gutterX - delta * i / dashesX) + 0.5, currentY, &quot;l&quot;, 0, dashSize + 1);
+                }
+                inflections.push([ Math.floor(currentX), Math.floor(y) ]);
+                if (calcLabels) {
+                    me.labels.push(me.labels[me.labels.length -1] + step);
+                }
+            }
+        }
+        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 &amp;&amp; me.grid) {
+            me.drawGrid();
+        }
+        me.axisBBox = me.axis.getBBox();
+        me.drawLabel();
+    },
+
+<span id='Ext-chart.axis.Axis-method-drawGrid'>    /**
+</span>     * 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,
+            gutter = me.chart.maxGutter,
+            width = me.width - 2,
+            vert = false,
+            point, prevPoint,
+            i = 1,
+            path = [], styles, lineWidth, dlineWidth,
+            oddPath = [], evenPath = [];
+        
+        if ((gutter[1] !== 0 &amp;&amp; (position == 'left' || position == 'right')) ||
+            (gutter[0] !== 0 &amp;&amp; (position == 'top' || position == 'bottom'))) {
+            i = 0;
+            ln++;
+        }
+        for (; i &lt; 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(&quot;M&quot;, prevPoint[0] + 1 + lineWidth, prevPoint[1] + 0.5 - lineWidth, 
+                              &quot;L&quot;, prevPoint[0] + 1 + width - lineWidth, prevPoint[1] + 0.5 - lineWidth,
+                              &quot;L&quot;, point[0] + 1 + width - lineWidth, point[1] + 0.5 + lineWidth,
+                              &quot;L&quot;, point[0] + 1 + lineWidth, point[1] + 0.5 + lineWidth, &quot;Z&quot;);
+                }
+                else if (position == 'right') {
+                    path.push(&quot;M&quot;, prevPoint[0] - lineWidth, prevPoint[1] + 0.5 - lineWidth, 
+                              &quot;L&quot;, prevPoint[0] - width + lineWidth, prevPoint[1] + 0.5 - lineWidth,
+                              &quot;L&quot;, point[0] - width + lineWidth, point[1] + 0.5 + lineWidth,
+                              &quot;L&quot;, point[0] - lineWidth, point[1] + 0.5 + lineWidth, &quot;Z&quot;);
+                }
+                else if (position == 'top') {
+                    path.push(&quot;M&quot;, prevPoint[0] + 0.5 + lineWidth, prevPoint[1] + 1 + lineWidth, 
+                              &quot;L&quot;, prevPoint[0] + 0.5 + lineWidth, prevPoint[1] + 1 + width - lineWidth,
+                              &quot;L&quot;, point[0] + 0.5 - lineWidth, point[1] + 1 + width - lineWidth,
+                              &quot;L&quot;, point[0] + 0.5 - lineWidth, point[1] + 1 + lineWidth, &quot;Z&quot;);
+                }
+                else {
+                    path.push(&quot;M&quot;, prevPoint[0] + 0.5 + lineWidth, prevPoint[1] - lineWidth, 
+                            &quot;L&quot;, prevPoint[0] + 0.5 + lineWidth, prevPoint[1] - width + lineWidth,
+                            &quot;L&quot;, point[0] + 0.5 - lineWidth, point[1] - width + lineWidth,
+                            &quot;L&quot;, point[0] + 0.5 - lineWidth, point[1] - lineWidth, &quot;Z&quot;);
+                }
+            } else {
+                if (position == 'left') {
+                    path = path.concat([&quot;M&quot;, point[0] + 0.5, point[1] + 0.5, &quot;l&quot;, width, 0]);
+                }
+                else if (position == 'right') {
+                    path = path.concat([&quot;M&quot;, point[0] - 0.5, point[1] + 0.5, &quot;l&quot;, -width, 0]);
+                }
+                else if (position == 'top') {
+                    path = path.concat([&quot;M&quot;, point[0] + 0.5, point[1] + 0.5, &quot;l&quot;, 0, width]);
+                }
+                else {
+                    path = path.concat([&quot;M&quot;, point[0] + 0.5, point[1] - 0.5, &quot;l&quot;, 0, -width]);
+                }
+            }
+        }
+        if (odd || even) {
+            if (oddPath.length) {
+                if (!me.gridOdd &amp;&amp; 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,
+                        &quot;stroke-width&quot;: 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,
+            position = me.position,
+            inflections = me.inflections,
+            ln = inflections.length,
+            labels = me.labels,
+            labelGroup = me.labelGroup,
+            maxHeight = 0,
+            ratio,
+            gutterY = me.chart.maxGutter[1],
+            ubbox, bbox, point, prevX, prevLabel,
+            projectedWidth = 0,
+            textLabel, attr, textRight, text,
+            label, 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.abs(Math.sin(labelConf.rotate &amp;&amp; (labelConf.rotate.degrees * Math.PI / 180) || 0)) &gt;&gt; 0;
+        
+        for (i = 0; i &lt; 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 (me.chart.maxGutter[0] == 0) {
+                if (i == 0 &amp;&amp; axes.findIndex('position', 'left') == -1) {
+                    x = point[0];
+                }
+                else if (i == last &amp;&amp; axes.findIndex('position', 'right') == -1) {
+                    x = point[0] - bbox.width;
+                }
+            }
+            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 &amp;&amp; (me.intersect(textLabel, prevLabel)
+                || me.intersect(textLabel, firstLabel))) {
+                textLabel.hide(true);
+                continue;
+            }
+            
+            prevLabel = textLabel;
+        }
+
+        return maxHeight;
+    },
+    
+    drawVerticalLabels: function() {
+        var me = this,
+            inflections = me.inflections,
+            position = me.position,
+            ln = inflections.length,
+            labels = me.labels,
+            maxWidth = 0,
+            max = Math.max,
+            floor = Math.floor,
+            ceil = Math.ceil,
+            axes = me.chart.axes,
+            gutterY = me.chart.maxGutter[1],
+            ubbox, bbox, point, prevLabel,
+            projectedWidth = 0,
+            textLabel, attr, textRight, text,
+            label, last, x, y, i;
+
+        last = ln;
+        for (i = 0; i &lt; last; 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 (gutterY &lt; bbox.height / 2) {
+                if (i == last - 1 &amp;&amp; axes.findIndex('position', 'top') == -1) {
+                    y = me.y - me.length + ceil(bbox.height / 2);
+                }
+                else if (i == 0 &amp;&amp; axes.findIndex('position', 'bottom') == -1) {
+                    y = me.y - 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 &amp;&amp; me.intersect(textLabel, prevLabel)) {
+                textLabel.hide(true);
+                continue;
+            }
+            prevLabel = textLabel;
+        }
+        
+        return maxWidth;
+    },
+
+<span id='Ext-chart.axis.Axis-method-drawLabel'>    /**
+</span>     * 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 &lt; 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);
+        }
+    },
+
+    // @private creates the elipsis for the text.
+    elipsis: function(sprite, text, desiredWidth, minWidth, center) {
+        var bbox,
+            x;
+
+        if (desiredWidth &lt; minWidth) {
+            sprite.hide(true);
+            return false;
+        }
+        while (text.length &gt; 4) {
+            text = text.substr(0, text.length - 4) + &quot;...&quot;;
+            sprite.setAttributes({
+                text: text
+            }, true);
+            bbox = sprite.getBBox();
+            if (bbox.width &lt; desiredWidth) {
+                if (typeof center == 'number') {
+                    sprite.setAttributes({
+                        x: Math.floor(center - (bbox.width / 2))
+                    }, true);
+                }
+                break;
+            }
+        }
+        return true;
+    },
+
+<span id='Ext-chart.axis.Axis-method-setTitle'>    /**
+</span>     * 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);
+    }
+});</pre></pre></body></html>
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