PieExample Class Reference
[Charts example]

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

#include <ChartsExample.h>

Inheritance diagram for PieExample:

Inheritance graph
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List of all members.

Public Member Functions

 PieExample (Wt::WContainerWidget *parent)
 Creates the pie chart example.


Detailed Description

A Widget that demonstrates a Pie chart.

Definition at line 59 of file ChartsExample.h.


Constructor & Destructor Documentation

PieExample::PieExample ( Wt::WContainerWidget parent  ) 

Creates the pie chart example.

Definition at line 228 of file ChartsExample.C.

00228                                               :
00229   WContainerWidget(parent)
00230 {
00231   new WText(WString::tr("pie chart"), this);
00232 
00233   WAbstractItemModel *model = readCsvFile("pie.csv", this);
00234 
00235   if (!model)
00236     return;
00237 
00238   /*
00239    * If we have JavaScript, show an Ext table view that allows editing
00240    * of the model.
00241    */
00242   if (wApp->environment().javaScript()) {
00243     WContainerWidget *w = new WContainerWidget(this);
00244     Ext::TableView *table = new Ext::TableView(w);
00245     table->setMargin(10, Top | Bottom);
00246     table->setMargin(WLength::Auto, Left | Right);
00247     table->resize(300, 175);
00248     table->setModel(model);
00249     table->setAutoExpandColumn(0);
00250 
00251     table->setEditor(0, new Ext::LineEdit());
00252 
00253     for (int i = 1; i < model->columnCount(); ++i)
00254       table->setEditor(i, new Ext::NumberField());
00255   }
00256 
00257   /*
00258    * Create the pie chart.
00259    */
00260   WPieChart *chart = new WPieChart(this);
00261   chart->setModel(model);       // set the model
00262   chart->setLabelsColumn(0);    // set the column that holds the labels
00263   chart->setDataColumn(1);      // set the column that holds the data
00264 
00265   // configure location and type of labels
00266   chart->setDisplayLabels(Outside | TextLabel | TextPercentage);
00267 
00268   // enable a 3D effect
00269   chart->setPerspectiveEnabled(true, 0.2);
00270 
00271   // explode the first item
00272   chart->setExplode(0, 0.3);
00273 
00274   chart->resize(800, 300); // WPaintedWidget must be given explicit size
00275 
00276   chart->setMargin(10, Top | Bottom);            // add margin vertically
00277   chart->setMargin(WLength::Auto, Left | Right); // center horizontally
00278 }


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

Generated on Fri Mar 26 17:12:12 2010 for Wt by doxygen 1.5.6