TimeSeriesExample Class Reference
[Charts example]

A widget that demonstrates a times series chart. More...

#include <ChartsExample.h>

Inheritance diagram for TimeSeriesExample:

Inheritance graph
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List of all members.

Public Member Functions

 TimeSeriesExample (Wt::WContainerWidget *parent)
 Creates the time series scatter plot example.


Detailed Description

A widget that demonstrates a times series chart.

Definition at line 29 of file ChartsExample.h.


Constructor & Destructor Documentation

TimeSeriesExample::TimeSeriesExample ( Wt::WContainerWidget parent  ) 

Creates the time series scatter plot example.

Definition at line 127 of file ChartsExample.C.

00127                                                               :
00128   WContainerWidget(parent)
00129 {
00130   new WText(WString::tr("scatter plot"), this);
00131 
00132   WAbstractItemModel *model = readCsvFile("timeseries.csv", this);
00133 
00134   if (!model)
00135     return;
00136 
00137   /*
00138    * Parse the first column as dates
00139    */
00140   for (int i = 0; i < model->rowCount(); ++i) {
00141     WString s = asString(model->data(i, 0));
00142     WDate d = WDate::fromString(s, "dd/MM/yy");
00143     model->setData(i, 0, boost::any(d));
00144   }
00145 
00146   /*
00147    * Create the scatter plot.
00148    */
00149   WCartesianChart *chart = new WCartesianChart(this);
00150   chart->setModel(model);        // set the model
00151   chart->setXSeriesColumn(0);    // set the column that holds the X data
00152   chart->setLegendEnabled(true); // enable the legend
00153 
00154   chart->setType(ScatterPlot);            // set type to ScatterPlot
00155   chart->axis(XAxis).setScale(DateScale); // set scale of X axis to DateScale
00156 
00157   // Provide space for the X and Y axis and title. 
00158   chart->setPlotAreaPadding(100, Left);
00159   chart->setPlotAreaPadding(50, Top | Bottom);
00160 
00161   /*
00162    * Add first two columns as line series
00163    */
00164   for (int i = 1; i < 3; ++i) {
00165     WDataSeries s(i, LineSeries);
00166     chart->addSeries(s);
00167   }
00168 
00169   chart->resize(800, 400); // WPaintedWidget must be given explicit size
00170 
00171   chart->setMargin(10, Top | Bottom);            // add margin vertically
00172   chart->setMargin(WLength::Auto, Left | Right); // center horizontally
00173 
00174   new ChartConfig(chart, this);
00175 }


The documentation for this class was generated from the following files:

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