/**
+ * @class Ext.chart.series.Cartesian
* @extends Ext.chart.series.Series
*
* Common base class for series implementations which plot values using x/y coordinates.
- *
- * @constructor
*/
Ext.define('Ext.chart.series.Cartesian', {
@@ -16,7 +31,7 @@ Ext.define('Ext.chart.series.Cartesian', {
/* End Definitions */
- /**
+ /**
* The field used to access the x axis value from the items from the data
* source.
*
@@ -25,7 +40,7 @@ Ext.define('Ext.chart.series.Cartesian', {
*/
xField: null,
- /**
+ /**
* The field used to access the y-axis value from the items from the data
* source.
*
@@ -34,12 +49,224 @@ Ext.define('Ext.chart.series.Cartesian', {
*/
yField: null,
- /**
- * Indicates which axis the series will bind to
- *
- * @property axis
- * @type String
+ /**
+ * @cfg {String} axis
+ * The position of the axis to bind the values to. Possible values are 'left', 'bottom', 'top' and 'right'.
+ * You must explicitly set this value to bind the values of the line series to the ones in the axis, otherwise a
+ * relative scale will be used.
+ */
+ axis: 'left',
+
+ getLegendLabels: function() {
+ var me = this,
+ labels = [],
+ combinations = me.combinations;
+
+ Ext.each([].concat(me.yField), function(yField, i) {
+ var title = me.title;
+ // Use the 'title' config if present, otherwise use the raw yField name
+ labels.push((Ext.isArray(title) ? title[i] : title) || yField);
+ });
+
+ // Handle yFields combined via legend drag-drop
+ if (combinations) {
+ Ext.each(combinations, function(combo) {
+ var label0 = labels[combo[0]],
+ label1 = labels[combo[1]];
+ labels[combo[1]] = label0 + ' & ' + label1;
+ labels.splice(combo[0], 1);
+ });
+ }
+
+ return labels;
+ },
+
+ /**
+ * @protected Iterates over a given record's values for each of this series's yFields,
+ * executing a given function for each value. Any yFields that have been combined
+ * via legend drag-drop will be treated as a single value.
+ * @param {Ext.data.Model} record
+ * @param {Function} fn
+ * @param {Object} scope
+ */
+ eachYValue: function(record, fn, scope) {
+ Ext.each(this.getYValueAccessors(), function(accessor, i) {
+ fn.call(scope, accessor(record), i);
+ });
+ },
+
+ /**
+ * @protected Returns the number of yField values, taking into account fields combined
+ * via legend drag-drop.
+ * @return {Number}
*/
- axis: 'left'
+ getYValueCount: function() {
+ return this.getYValueAccessors().length;
+ },
+
+ combine: function(index1, index2) {
+ var me = this,
+ accessors = me.getYValueAccessors(),
+ accessor1 = accessors[index1],
+ accessor2 = accessors[index2];
+
+ // Combine the yValue accessors for the two indexes into a single accessor that returns their sum
+ accessors[index2] = function(record) {
+ return accessor1(record) + accessor2(record);
+ };
+ accessors.splice(index1, 1);
+
+ me.callParent([index1, index2]);
+ },
+
+ clearCombinations: function() {
+ // Clear combined accessors, they'll get regenerated on next call to getYValueAccessors
+ delete this.yValueAccessors;
+ this.callParent();
+ },
+
+ /**
+ * @protected Returns an array of functions, each of which returns the value of the yField
+ * corresponding to function's index in the array, for a given record (each function takes the
+ * record as its only argument.) If yFields have been combined by the user via legend drag-drop,
+ * this list of accessors will be kept in sync with those combinations.
+ * @return {Array} array of accessor functions
+ */
+ getYValueAccessors: function() {
+ var me = this,
+ accessors = me.yValueAccessors;
+ if (!accessors) {
+ accessors = me.yValueAccessors = [];
+ Ext.each([].concat(me.yField), function(yField) {
+ accessors.push(function(record) {
+ return record.get(yField);
+ });
+ });
+ }
+ return accessors;
+ },
+
+ /**
+ * Calculate the min and max values for this series's xField.
+ * @return {Array} [min, max]
+ */
+ getMinMaxXValues: function() {
+ var me = this,
+ min, max,
+ xField = me.xField;
+
+ if (me.getRecordCount() > 0) {
+ min = Infinity;
+ max = -min;
+ me.eachRecord(function(record) {
+ var xValue = record.get(xField);
+ if (xValue > max) {
+ max = xValue;
+ }
+ if (xValue < min) {
+ min = xValue;
+ }
+ });
+ } else {
+ min = max = 0;
+ }
+ return [min, max];
+ },
+
+ /**
+ * Calculate the min and max values for this series's yField(s). Takes into account yField
+ * combinations, exclusions, and stacking.
+ * @return {Array} [min, max]
+ */
+ getMinMaxYValues: function() {
+ var me = this,
+ stacked = me.stacked,
+ min, max,
+ positiveTotal, negativeTotal;
+
+ function eachYValueStacked(yValue, i) {
+ if (!me.isExcluded(i)) {
+ if (yValue < 0) {
+ negativeTotal += yValue;
+ } else {
+ positiveTotal += yValue;
+ }
+ }
+ }
+
+ function eachYValue(yValue, i) {
+ if (!me.isExcluded(i)) {
+ if (yValue > max) {
+ max = yValue;
+ }
+ if (yValue < min) {
+ min = yValue;
+ }
+ }
+ }
+
+ if (me.getRecordCount() > 0) {
+ min = Infinity;
+ max = -min;
+ me.eachRecord(function(record) {
+ if (stacked) {
+ positiveTotal = 0;
+ negativeTotal = 0;
+ me.eachYValue(record, eachYValueStacked);
+ if (positiveTotal > max) {
+ max = positiveTotal;
+ }
+ if (negativeTotal < min) {
+ min = negativeTotal;
+ }
+ } else {
+ me.eachYValue(record, eachYValue);
+ }
+ });
+ } else {
+ min = max = 0;
+ }
+ return [min, max];
+ },
+
+ getAxesForXAndYFields: function() {
+ var me = this,
+ axes = me.chart.axes,
+ axis = [].concat(me.axis),
+ xAxis, yAxis;
+
+ if (Ext.Array.indexOf(axis, 'top') > -1) {
+ xAxis = 'top';
+ } else if (Ext.Array.indexOf(axis, 'bottom') > -1) {
+ xAxis = 'bottom';
+ } else {
+ if (axes.get('top')) {
+ xAxis = 'top';
+ } else if (axes.get('bottom')) {
+ xAxis = 'bottom';
+ }
+ }
+
+ if (Ext.Array.indexOf(axis, 'left') > -1) {
+ yAxis = 'left';
+ } else if (Ext.Array.indexOf(axis, 'right') > -1) {
+ yAxis = 'right';
+ } else {
+ if (axes.get('left')) {
+ yAxis = 'left';
+ } else if (axes.get('right')) {
+ yAxis = 'right';
+ }
+ }
+
+ return {
+ xAxis: xAxis,
+ yAxis: yAxis
+ };
+ }
+
+
});
-