CategoryExample Class Reference

A Widget that demonstrates a category chart. More...

#include <ChartsExample.h>

Inheritance diagram for CategoryExample:

Public Member Functions
	CategoryExample (Wt::WContainerWidget *parent)
	Creates the category chart 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 category chart.

Definition at line 39 of file ChartsExample.h.

Constructor & Destructor Documentation

CategoryExample::CategoryExample

(

Wt::WContainerWidget *

parent)

Creates the category chart example.

Definition at line 83 of file ChartsExample.C.

                                                          :
  WContainerWidget(parent)
{
  new WText(WString::tr("category chart"), this);

  WAbstractItemModel *model
    = readCsvFile(WApplication::appRoot() + "category.csv", this);

  if (!model)
    return;

  // Show a view that allows editing of the model.
  WContainerWidget *w = new WContainerWidget(this);
  WTableView *table = new WTableView(w);

  table->setMargin(10, Top | Bottom);
  table->setMargin(WLength::Auto, Left | Right);

  table->setModel(model);
  table->setSortingEnabled(true);
  table->setColumnResizeEnabled(true);
  // table->setSelectionMode(ExtendedSelection);
  table->setAlternatingRowColors(true);
  table->setColumnAlignment(0, AlignCenter);
  table->setHeaderAlignment(0, AlignCenter);
  table->setRowHeight(22);

  // Editing does not really work without Ajax, it would require an
  // additional button somewhere to confirm the edited value.
  if (WApplication::instance()->environment().ajax()) {
    table->resize(600, 20 + 5*22);
    table->setEditTriggers(WAbstractItemView::SingleClicked);
  } else {
    table->resize(600, WLength::Auto);
    table->setEditTriggers(WAbstractItemView::NoEditTrigger);
  }

  // We use a single delegate for all items which rounds values to
  // the closest integer value.
  WItemDelegate *delegate = new WItemDelegate(this);
  delegate->setTextFormat("%.f");
  table->setItemDelegate(delegate);

  table->setColumnWidth(0, 80);
  for (int i = 1; i < model->columnCount(); ++i)
    table->setColumnWidth(i, 120);

  /*
   * Create the category chart.
   */
  WCartesianChart *chart = new WCartesianChart(this);
  // chart->setPreferredMethod(WPaintedWidget::PngImage);
  chart->setModel(model);        // set the model
  chart->setXSeriesColumn(0);    // set the column that holds the categories
  chart->setLegendEnabled(true); // enable the legend

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

  /*
   * Add all (but first) column as bar series
   */
  for (int i = 1; i < model->columnCount(); ++i) {
    WDataSeries s(i, BarSeries);
    s.setShadow(WShadow(3, 3, WColor(0, 0, 0, 127), 3));
    chart->addSeries(s);
  }

  chart->resize(800, 400);

  chart->setMargin(10, Top | Bottom);
  chart->setMargin(WLength::Auto, Left | Right);

  /*
   * Provide a widget to manipulate chart properties
   */
  new ChartConfig(chart, this);
}

---

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