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 224 of file ChartsExample.C.

00224                                               :
00225   WContainerWidget(parent)
00226 {
00227   new WText(WString::tr("pie chart"), this);
00228 
00229   WAbstractItemModel *model = readCsvFile("pie.csv", this);
00230 
00231   if (!model)
00232     return;
00233 
00234   /*
00235    * If we have JavaScript, show an Ext table view that allows editing
00236    * of the model.
00237    */
00238   if (wApp->environment().javaScript()) {
00239     WContainerWidget *w = new WContainerWidget(this);
00240     Ext::TableView *table = new Ext::TableView(w);
00241     table->setMargin(10, Top | Bottom);
00242     table->setMargin(WLength(), Left | Right);
00243     table->resize(300, 175);
00244     table->setModel(model);
00245     table->setAutoExpandColumn(0);
00246 
00247     table->setEditor(0, new Ext::LineEdit());
00248 
00249     for (int i = 1; i < model->columnCount(); ++i)
00250       table->setEditor(i, new Ext::NumberField());
00251   }
00252 
00253   /*
00254    * Create the pie chart.
00255    */
00256   WPieChart *chart = new WPieChart(this);
00257   chart->setModel(model);       // set the model
00258   chart->setLabelsColumn(0);    // set the column that holds the labels
00259   chart->setDataColumn(1);      // set the column that holds the data
00260 
00261   // configure location and type of labels
00262   chart->setDisplayLabels(Outside | TextLabel | TextPercentage);
00263 
00264   // enable a 3D effect
00265   chart->setPerspectiveEnabled(true, 0.2);
00266 
00267   // explode the first item
00268   chart->setExplode(0, 0.3);
00269 
00270   chart->resize(800, 300); // WPaintedWidget must be given explicit size
00271 
00272   chart->setMargin(10, Top | Bottom);        // add margin vertically
00273   chart->setMargin(WLength(), Left | Right); // center horizontally
00274 }


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

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