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/usr/lib/Wt/examples/charts/ChartConfig.h is in witty-examples 3.3.0-1build1.

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// This may look like C code, but it's really -*- C++ -*-
/*
 * Copyright (C) 2008 Emweb bvba, Kessel-Lo, Belgium.
 *
 * See the LICENSE file for terms of use.
 */
#ifndef CHART_CONFIG_H_
#define CHART_CONFIG_H_

#include <Wt/WContainerWidget>
#include <Wt/Chart/WDataSeries>

namespace Wt {
  class WCheckBox;
  class WComboBox;
  class WFormWidget;
  class WLineEdit;
  class WTable;

  namespace Chart {
    class WCartesianChart;
  }
}

/**
 * @addtogroup chartsexample
 */
/*@{*/

/*! \brief A class that allows configuration of a cartesian chart.
 *
 * This widget provides forms for configuring chart, series, and axis properties
 * and manipulates the chart according to user settings.
 *
 * This widget is part of the %Wt charts example.
 */
class ChartConfig : public Wt::WContainerWidget
{
public:
  /*! \brief Constructor.
   */  
  ChartConfig(Wt::Chart::WCartesianChart *chart, Wt::WContainerWidget *parent);

  void setValueFill(Wt::Chart::FillRangeType fill);

private:
  Wt::Chart::WCartesianChart  *chart_;
  Wt::Chart::FillRangeType fill_;

  //! Struct that holds the controls for one series
  struct SeriesControl {
    Wt::WCheckBox *enabledEdit;
    Wt::WComboBox *typeEdit;
    Wt::WComboBox *markerEdit;
    Wt::WComboBox *axisEdit;
    Wt::WCheckBox *legendEdit;
    Wt::WCheckBox *shadowEdit;
    Wt::WComboBox *labelsEdit;
  };

  //! Controls for series
  std::vector<SeriesControl> seriesControls_;

  //! Struct that holds the controls for one axis
  struct AxisControl {
    Wt::WCheckBox *visibleEdit;
    Wt::WComboBox *scaleEdit;
    Wt::WCheckBox *autoEdit;
    Wt::WLineEdit *minimumEdit;
    Wt::WLineEdit *maximumEdit;
    Wt::WCheckBox *gridLinesEdit;
    Wt::WLineEdit *labelAngleEdit;
  };

  //! Controls for axes
  std::vector<AxisControl> axisControls_;

  Wt::WLineEdit *titleEdit_;
  Wt::WLineEdit *chartWidthEdit_;
  Wt::WLineEdit *chartHeightEdit_;
  Wt::WComboBox *chartOrientationEdit_;
  Wt::WComboBox *legendLocationEdit_;
  Wt::WComboBox *legendSideEdit_;
  Wt::WComboBox *legendAlignmentEdit_;

  void connectSignals(Wt::WFormWidget *w);
  void update();

  static bool validate(Wt::WFormWidget *w);
};

/*@}*/

#endif // CHARTS_EXAMPLE_H_