ScatterPlotExample Class Reference

A Widget that demonstrates a scatter plot. More...

#include <ChartsExample.h>

Inheritance diagram for ScatterPlotExample:

Public Member Functions
	ScatterPlotExample (Wt::WContainerWidget *parent)
	Creates the scatter plot example. More...

Additional Inherited Members
Protected Member Functions inherited from Wt::WWidget
virtual void	enableAjax ()=0
virtual void	propagateSetEnabled (bool enabled)=0
virtual void	render (WFlags< RenderFlag > flags)

Detailed Description

A Widget that demonstrates a scatter plot.

Definition at line 49 of file ChartsExample.h.

Constructor & Destructor Documentation

ScatterPlotExample::ScatterPlotExample

(

Wt::WContainerWidget *

parent)

Creates the scatter plot example.

Definition at line 252 of file ChartsExample.C.

                                                              :
  WContainerWidget(parent)
{
  new WText(WString::tr("scatter plot 2"), this);

  WStandardItemModel *model = new WStandardItemModel(40, 2, this);
  model->setHeaderData(0, WString("X"));
  model->setHeaderData(1, WString("Y = sin(X)"));

  for (unsigned i = 0; i < 40; ++i) {
    double x = (static_cast<double>(i) - 20) / 4;

    model->setData(i, 0, x);
    model->setData(i, 1, sin(x));
  }
 
  /*
   * Create the scatter plot.
   */
  WCartesianChart *chart = new WCartesianChart(this);
  chart->setModel(model);        // set the model
  chart->setXSeriesColumn(0);    // set the column that holds the X data
  chart->setLegendEnabled(true); // enable the legend

  chart->setType(ScatterPlot);   // set type to ScatterPlot

  // Typically, for mathematical functions, you want the axes to cross
  // at the 0 mark:
  chart->axis(XAxis).setLocation(ZeroValue);
  chart->axis(YAxis).setLocation(ZeroValue);

  // Provide space for the X and Y axis and title. 
  chart->setPlotAreaPadding(80, Left);
  chart->setPlotAreaPadding(40, Top | Bottom);

  // Add the curves
  WDataSeries s(1, CurveSeries);
  s.setShadow(WShadow(3, 3, WColor(0, 0, 0, 127), 3));
  chart->addSeries(s);

  chart->resize(800, 300); // WPaintedWidget must be given explicit size

  chart->setMargin(10, Top | Bottom);            // add margin vertically
  chart->setMargin(WLength::Auto, Left | Right); // center horizontally

  ChartConfig *config = new ChartConfig(chart, this);
  config->setValueFill(ZeroValueFill);
}

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

• /build/buildd/witty-3.3.0/examples/charts/ChartsExample.h
• /build/buildd/witty-3.3.0/examples/charts/ChartsExample.C