TimeSeriesExample Class Reference
[Charts example]

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

#include <ChartsExample.h>

Inherits Wt::WContainerWidget.

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 128 of file ChartsExample.C.

00129                                                               :
00130   WContainerWidget(parent)
00131 {
00132   new WText(WString::tr("scatter plot"), this);
00133 
00134   WAbstractItemModel *model = readCsvFile("timeseries.csv", this);
00135 
00136   if (!model)
00137     return;
00138 
00139   /*
00140    * Parse the first column as dates
00141    */
00142   for (int i = 0; i < model->rowCount(); ++i) {
00143     WString s = asString(model->data(i, 0));
00144     WDate d = WDate::fromString(s, "dd/MM/yy");
00145     model->setData(i, 0, boost::any(d));
00146   }
00147 
00148   /*
00149    * Create the scatter plot.
00150    */
00151   WCartesianChart *chart = new WCartesianChart(this);
00152   chart->setModel(model);        // set the model
00153   chart->setXSeriesColumn(0);    // set the column that holds the X data
00154   chart->setLegendEnabled(true); // enable the legend
00155 
00156   chart->setType(ScatterPlot);            // set type to ScatterPlot
00157   chart->axis(XAxis).setScale(DateScale); // set scale of X axis to DateScale
00158 
00159   // Provide space for the X and Y axis and title. 
00160   chart->setPlotAreaPadding(100, Left);
00161   chart->setPlotAreaPadding(50, Top | Bottom);
00162 
00163   /*
00164    * Add first two columns as line series
00165    */
00166   for (int i = 1; i < 3; ++i) {
00167     WDataSeries s(i, LineSeries);
00168     s.setShadow(WShadow(3, 3, WColor(0, 0, 0, 127), 3));
00169     chart->addSeries(s);
00170   }
00171 
00172   chart->resize(800, 400); // WPaintedWidget must be given explicit size
00173 
00174   chart->setMargin(10, Top | Bottom);            // add margin vertically
00175   chart->setMargin(WLength::Auto, Left | Right); // center horizontally
00176 
00177   new ChartConfig(chart, this);
}


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

Generated on Thu May 13 05:16:01 2010 for Wt by doxygen 1.6.3