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/**
* Chart type enumerations
*/
var ChartType = {
LINE : 'line',
SPLINE : 'spline',
AREA : 'area',
BAR : 'bar',
COLUMN : 'column',
PIE : 'pie',
TIMELINE: 'timeline',
SCATTER: 'scatter'
};
/**
* Column type enumeration
*/
var ColumnType = {
STRING : 'string',
NUMBER : 'number',
BOOLEAN : 'boolean',
DATE : 'date'
};
/**
* Abstract chart factory which defines the contract for chart factories
*/
var ChartFactory = function () {
};
ChartFactory.prototype = {
createChart : function (type, options) {
throw new Error('createChart must be implemented by a subclass');
}
};
/**
* Abstract chart which defines the contract for charts
*
* @param elementId
* id of the div element the chart is drawn in
*/
var Chart = function (elementId) {
this.elementId = elementId;
};
Chart.prototype = {
draw : function (data, options) {
throw new Error('draw must be implemented by a subclass');
},
redraw : function (options) {
throw new Error('redraw must be implemented by a subclass');
},
destroy : function () {
throw new Error('destroy must be implemented by a subclass');
},
toImageString : function () {
throw new Error('toImageString must be implemented by a subclass');
}
};
/**
* Abstract representation of charts that operates on DataTable where,<br />
* <ul>
* <li>First column provides index to the data.</li>
* <li>Each subsequent columns are of type
* <code>ColumnType.NUMBER<code> and represents a data series.</li>
* </ul>
* Line chart, area chart, bar chart, column chart are typical examples.
*
* @param elementId
* id of the div element the chart is drawn in
*/
var BaseChart = function (elementId) {
Chart.call(this, elementId);
};
BaseChart.prototype = new Chart();
BaseChart.prototype.constructor = BaseChart;
BaseChart.prototype.validateColumns = function (dataTable) {
var columns = dataTable.getColumns();
if (columns.length < 2) {
throw new Error('Minimum of two columns are required for this chart');
}
for (var i = 1; i < columns.length; i++) {
if (columns[i].type !== ColumnType.NUMBER) {
throw new Error('Column ' + (i + 1) + ' should be of type \'Number\'');
}
}
return true;
};
/**
* Abstract pie chart
*
* @param elementId
* id of the div element the chart is drawn in
*/
var PieChart = function (elementId) {
BaseChart.call(this, elementId);
};
PieChart.prototype = new BaseChart();
PieChart.prototype.constructor = PieChart;
PieChart.prototype.validateColumns = function (dataTable) {
var columns = dataTable.getColumns();
if (columns.length > 2) {
throw new Error('Pie charts can draw only one series');
}
return BaseChart.prototype.validateColumns.call(this, dataTable);
};
/**
* Abstract timeline chart
*
* @param elementId
* id of the div element the chart is drawn in
*/
var TimelineChart = function (elementId) {
BaseChart.call(this, elementId);
};
TimelineChart.prototype = new BaseChart();
TimelineChart.prototype.constructor = TimelineChart;
TimelineChart.prototype.validateColumns = function (dataTable) {
var result = BaseChart.prototype.validateColumns.call(this, dataTable);
if (result) {
var columns = dataTable.getColumns();
if (columns[0].type !== ColumnType.DATE) {
throw new Error('First column of timeline chart need to be a date column');
}
}
return result;
};
/**
* Abstract scatter chart
*
* @param elementId
* id of the div element the chart is drawn in
*/
var ScatterChart = function (elementId) {
BaseChart.call(this, elementId);
};
ScatterChart.prototype = new BaseChart();
ScatterChart.prototype.constructor = ScatterChart;
ScatterChart.prototype.validateColumns = function (dataTable) {
var result = BaseChart.prototype.validateColumns.call(this, dataTable);
if (result) {
var columns = dataTable.getColumns();
if (columns[0].type !== ColumnType.NUMBER) {
throw new Error('First column of scatter chart need to be a numeric column');
}
}
return result;
};
/**
* The data table contains column information and data for the chart.
*/
var DataTable = function () {
var columns = [];
var data = null;
this.addColumn = function (type, name) {
columns.push({
'type' : type,
'name' : name
});
};
this.getColumns = function () {
return columns;
};
this.setData = function (rows) {
data = rows;
fillMissingValues();
};
this.getData = function () {
return data;
};
var fillMissingValues = function () {
if (columns.length === 0) {
throw new Error('Set columns first');
}
var row;
for (var i = 0; i < data.length; i++) {
row = data[i];
if (row.length > columns.length) {
row.splice(columns.length - 1, row.length - columns.length);
} else if (row.length < columns.length) {
for (var j = row.length; j < columns.length; j++) {
row.push(null);
}
}
}
};
};
/** *****************************************************************************
* JQPlot specific code
******************************************************************************/
/**
* Abstract JQplot chart
*
* @param elementId
* id of the div element the chart is drawn in
*/
var JQPlotChart = function (elementId) {
Chart.call(this, elementId);
this.plot = null;
this.validator = null;
};
JQPlotChart.prototype = new Chart();
JQPlotChart.prototype.constructor = JQPlotChart;
JQPlotChart.prototype.draw = function (data, options) {
if (this.validator.validateColumns(data)) {
this.plot = $.jqplot(this.elementId, this.prepareData(data), this
.populateOptions(data, options));
}
};
JQPlotChart.prototype.destroy = function () {
if (this.plot !== null) {
this.plot.destroy();
}
};
JQPlotChart.prototype.redraw = function (options) {
if (this.plot !== null) {
this.plot.replot(options);
}
};
JQPlotChart.prototype.toImageString = function (options) {
if (this.plot !== null) {
return $('#' + this.elementId).jqplotToImageStr({});
}
};
JQPlotChart.prototype.populateOptions = function (dataTable, options) {
throw new Error('populateOptions must be implemented by a subclass');
};
JQPlotChart.prototype.prepareData = function (dataTable) {
throw new Error('prepareData must be implemented by a subclass');
};
/**
* JQPlot line chart
*
* @param elementId
* id of the div element the chart is drawn in
*/
var JQPlotLineChart = function (elementId) {
JQPlotChart.call(this, elementId);
this.validator = BaseChart.prototype;
};
JQPlotLineChart.prototype = new JQPlotChart();
JQPlotLineChart.prototype.constructor = JQPlotLineChart;
JQPlotLineChart.prototype.populateOptions = function (dataTable, options) {
var columns = dataTable.getColumns();
var optional = {
axes : {
xaxis : {
label : columns[0].name,
renderer : $.jqplot.CategoryAxisRenderer,
ticks : []
},
yaxis : {
label : (columns.length === 2 ? columns[1].name : 'Values'),
labelRenderer : $.jqplot.CanvasAxisLabelRenderer
}
},
highlighter: {
show: true,
tooltipAxes: 'y',
formatString:'%d'
},
series : []
};
$.extend(true, optional, options);
if (optional.series.length === 0) {
for (var i = 1; i < columns.length; i++) {
optional.series.push({
label : columns[i].name.toString()
});
}
}
if (optional.axes.xaxis.ticks.length === 0) {
var data = dataTable.getData();
for (var j = 0; j < data.length; j++) {
optional.axes.xaxis.ticks.push(data[j][0].toString());
}
}
return optional;
};
JQPlotLineChart.prototype.prepareData = function (dataTable) {
var data = dataTable.getData();
var row;
var retData = [];
var retRow;
for (var i = 0; i < data.length; i++) {
row = data[i];
for (var j = 1; j < row.length; j++) {
retRow = retData[j - 1];
if (retRow === undefined) {
retRow = [];
retData[j - 1] = retRow;
}
retRow.push(row[j]);
}
}
return retData;
};
/**
* JQPlot spline chart
*
* @param elementId
* id of the div element the chart is drawn in
*/
var JQPlotSplineChart = function (elementId) {
JQPlotLineChart.call(this, elementId);
};
JQPlotSplineChart.prototype = new JQPlotLineChart();
JQPlotSplineChart.prototype.constructor = JQPlotSplineChart;
JQPlotSplineChart.prototype.populateOptions = function (dataTable, options) {
var optional = {};
var opt = JQPlotLineChart.prototype.populateOptions.call(this, dataTable,
options);
var compulsory = {
seriesDefaults : {
rendererOptions : {
smooth : true
}
}
};
$.extend(true, optional, opt, compulsory);
return optional;
};
/**
* JQPlot scatter chart
*
* @param elementId
* id of the div element the chart is drawn in
*/
var JQPlotScatterChart = function (elementId) {
JQPlotChart.call(this, elementId);
this.validator = ScatterChart.prototype;
};
JQPlotScatterChart.prototype = new JQPlotChart();
JQPlotScatterChart.prototype.constructor = JQPlotScatterChart;
JQPlotScatterChart.prototype.populateOptions = function (dataTable, options) {
var columns = dataTable.getColumns();
var optional = {
axes : {
xaxis : {
label : columns[0].name
},
yaxis : {
label : (columns.length === 2 ? columns[1].name : 'Values'),
labelRenderer : $.jqplot.CanvasAxisLabelRenderer
}
},
highlighter: {
show: true,
tooltipAxes: 'xy',
formatString:'%d, %d'
},
series : []
};
for (var i = 1; i < columns.length; i++) {
optional.series.push({
label : columns[i].name.toString()
});
}
var compulsory = {
seriesDefaults : {
showLine: false,
markerOptions: {
size: 7,
style: 'x'
}
}
};
$.extend(true, optional, options, compulsory);
return optional;
};
JQPlotScatterChart.prototype.prepareData = function (dataTable) {
var data = dataTable.getData();
var row;
var retData = [];
var retRow;
for (var i = 0; i < data.length; i++) {
row = data[i];
if (row[0]) {
for (var j = 1; j < row.length; j++) {
retRow = retData[j - 1];
if (retRow === undefined) {
retRow = [];
retData[j - 1] = retRow;
}
retRow.push([row[0], row[j]]);
}
}
}
return retData;
};
/**
* JQPlot timeline chart
*
* @param elementId
* id of the div element the chart is drawn in
*/
var JQPlotTimelineChart = function (elementId) {
JQPlotLineChart.call(this, elementId);
this.validator = TimelineChart.prototype;
};
JQPlotTimelineChart.prototype = new JQPlotLineChart();
JQPlotTimelineChart.prototype.constructor = JQPlotTimelineChart;
JQPlotTimelineChart.prototype.populateOptions = function (dataTable, options) {
var optional = {
axes : {
xaxis : {
tickOptions : {
formatString: '%b %#d, %y'
}
}
}
};
var opt = JQPlotLineChart.prototype.populateOptions.call(this, dataTable, options);
var compulsory = {
axes : {
xaxis : {
renderer : $.jqplot.DateAxisRenderer
}
}
};
$.extend(true, optional, opt, compulsory);
return optional;
};
JQPlotTimelineChart.prototype.prepareData = function (dataTable) {
var data = dataTable.getData();
var row;
var d;
var retData = [];
var retRow;
for (var i = 0; i < data.length; i++) {
row = data[i];
d = row[0];
for (var j = 1; j < row.length; j++) {
retRow = retData[j - 1];
if (retRow === undefined) {
retRow = [];
retData[j - 1] = retRow;
}
if (d !== null) {
retRow.push([d.getTime(), row[j]]);
}
}
}
return retData;
};
/**
* JQPlot area chart
*
* @param elementId
* id of the div element the chart is drawn in
*/
var JQPlotAreaChart = function (elementId) {
JQPlotLineChart.call(this, elementId);
};
JQPlotAreaChart.prototype = new JQPlotLineChart();
JQPlotAreaChart.prototype.constructor = JQPlotAreaChart;
JQPlotAreaChart.prototype.populateOptions = function (dataTable, options) {
var optional = {
seriesDefaults : {
fillToZero : true
}
};
var opt = JQPlotLineChart.prototype.populateOptions.call(this, dataTable,
options);
var compulsory = {
seriesDefaults : {
fill : true
}
};
$.extend(true, optional, opt, compulsory);
return optional;
};
/**
* JQPlot column chart
*
* @param elementId
* id of the div element the chart is drawn in
*/
var JQPlotColumnChart = function (elementId) {
JQPlotLineChart.call(this, elementId);
};
JQPlotColumnChart.prototype = new JQPlotLineChart();
JQPlotColumnChart.prototype.constructor = JQPlotColumnChart;
JQPlotColumnChart.prototype.populateOptions = function (dataTable, options) {
var optional = {
seriesDefaults : {
fillToZero : true
}
};
var opt = JQPlotLineChart.prototype.populateOptions.call(this, dataTable,
options);
var compulsory = {
seriesDefaults : {
renderer : $.jqplot.BarRenderer
}
};
$.extend(true, optional, opt, compulsory);
return optional;
};
/**
* JQPlot bar chart
*
* @param elementId
* id of the div element the chart is drawn in
*/
var JQPlotBarChart = function (elementId) {
JQPlotLineChart.call(this, elementId);
};
JQPlotBarChart.prototype = new JQPlotLineChart();
JQPlotBarChart.prototype.constructor = JQPlotBarChart;
JQPlotBarChart.prototype.populateOptions = function (dataTable, options) {
var columns = dataTable.getColumns();
var optional = {
axes : {
yaxis : {
label : columns[0].name,
labelRenderer : $.jqplot.CanvasAxisLabelRenderer,
renderer : $.jqplot.CategoryAxisRenderer,
ticks : []
},
xaxis : {
label : (columns.length === 2 ? columns[1].name : 'Values'),
labelRenderer : $.jqplot.CanvasAxisLabelRenderer
}
},
highlighter: {
show: true,
tooltipAxes: 'x',
formatString:'%d'
},
series : [],
seriesDefaults : {
fillToZero : true
}
};
var compulsory = {
seriesDefaults : {
renderer : $.jqplot.BarRenderer,
rendererOptions : {
barDirection : 'horizontal'
}
}
};
$.extend(true, optional, options, compulsory);
if (optional.axes.yaxis.ticks.length === 0) {
var data = dataTable.getData();
for (var i = 0; i < data.length; i++) {
optional.axes.yaxis.ticks.push(data[i][0].toString());
}
}
if (optional.series.length === 0) {
for (var j = 1; j < columns.length; j++) {
optional.series.push({
label : columns[j].name.toString()
});
}
}
return optional;
};
/**
* JQPlot pie chart
*
* @param elementId
* id of the div element the chart is drawn in
*/
var JQPlotPieChart = function (elementId) {
JQPlotChart.call(this, elementId);
this.validator = PieChart.prototype;
};
JQPlotPieChart.prototype = new JQPlotChart();
JQPlotPieChart.prototype.constructor = JQPlotPieChart;
JQPlotPieChart.prototype.populateOptions = function (dataTable, options) {
var optional = {
highlighter: {
show: true,
tooltipAxes: 'xy',
formatString:'%s, %d',
useAxesFormatters: false
},
legend: {
renderer: $.jqplot.EnhancedPieLegendRenderer,
},
};
var compulsory = {
seriesDefaults : {
shadow: false,
renderer : $.jqplot.PieRenderer,
rendererOptions: { sliceMargin: 1, showDataLabels: true }
}
};
$.extend(true, optional, options, compulsory);
return optional;
};
JQPlotPieChart.prototype.prepareData = function (dataTable) {
var data = dataTable.getData();
var row;
var retData = [];
for (var i = 0; i < data.length; i++) {
row = data[i];
retData.push([row[0], row[1]]);
}
return [retData];
};
/**
* Chart factory that returns JQPlotCharts
*/
var JQPlotChartFactory = function () {
};
JQPlotChartFactory.prototype = new ChartFactory();
JQPlotChartFactory.prototype.createChart = function (type, elementId) {
var chart = null;
switch (type) {
case ChartType.LINE:
chart = new JQPlotLineChart(elementId);
break;
case ChartType.SPLINE:
chart = new JQPlotSplineChart(elementId);
break;
case ChartType.TIMELINE:
chart = new JQPlotTimelineChart(elementId);
break;
case ChartType.AREA:
chart = new JQPlotAreaChart(elementId);
break;
case ChartType.BAR:
chart = new JQPlotBarChart(elementId);
break;
case ChartType.COLUMN:
chart = new JQPlotColumnChart(elementId);
break;
case ChartType.PIE:
chart = new JQPlotPieChart(elementId);
break;
case ChartType.SCATTER:
chart = new JQPlotScatterChart(elementId);
break;
}
return chart;
};
