PieExample Class Reference

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

#include <ChartsExample.h>

Inheritance diagram for PieExample:

Public Member Functions
	PieExample (Wt::WContainerWidget *parent)
	Creates the pie 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 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 301 of file ChartsExample.C.

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

  WStandardItemModel *model = new WStandardItemModel(this);
  
  //headers
  model->insertColumns(model->columnCount(), 2);
  model->setHeaderData(0, WString("Item"));
  model->setHeaderData(1, WString("Sales"));

  //data
  model->insertRows(model->rowCount(), 6);
  int row = 0;
  model->setData(row, 0, WString("Blueberry"));
  model->setData(row, 1, 120);
  // model->setData(row, 1, WString("Blueberry"), ToolTipRole);
  row++;
  model->setData(row, 0, WString("Cherry"));
  model->setData(row, 1, 30);
  row++;
  model->setData(row, 0, WString("Apple"));
  model->setData(row, 1, 260);
  row++;
  model->setData(row, 0, WString("Boston Cream"));
  model->setData(row, 1, 160);
  row++;
  model->setData(row, 0, WString("Other"));
  model->setData(row, 1, 40);
  row++;
  model->setData(row, 0, WString("Vanilla Cream"));
  model->setData(row, 1, 120);
  row++;

  //set all items to be editable and selectable
  for (int row = 0; row < model->rowCount(); ++row)
    for (int col = 0; col < model->columnCount(); ++col)
      model->item(row, col)->setFlags(ItemIsSelectable | ItemIsEditable);

  WContainerWidget *w = new WContainerWidget(this);
  WTableView* table = new WTableView(w);

  table->setMargin(10, Top | Bottom);
  table->setMargin(WLength::Auto, Left | Right);
  table->setSortingEnabled(true);
  table->setModel(model);
  table->setColumnWidth(1, 100);
  table->setRowHeight(22);

  if (WApplication::instance()->environment().ajax()) {
    table->resize(150 + 100 + 14, 20 + 6 * 22);
    table->setEditTriggers(WAbstractItemView::SingleClicked);
  } else {
    table->resize(150 + 100 + 14, WLength::Auto);
    table->setEditTriggers(WAbstractItemView::NoEditTrigger);    
  }

  /*
   * Create the pie chart.
   */
  WPieChart *chart = new WPieChart(this);
  chart->setModel(model);       // set the model
  chart->setLabelsColumn(0);    // set the column that holds the labels
  chart->setDataColumn(1);      // set the column that holds the data

  // configure location and type of labels
  chart->setDisplayLabels(Outside | TextLabel | TextPercentage);

  // enable a 3D and shadow effect
  chart->setPerspectiveEnabled(true, 0.2);
  chart->setShadowEnabled(true);

  // explode the first item
  chart->setExplode(0, 0.3);

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

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

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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