dataset.h

// Name:    dataset.h
// Purpose: dataset base class declarations
// Author:  Moskvichev Andrey V.
// Created: 2008/11/07
// Copyright:   (c) 2008-2010 Moskvichev Andrey V.
// Licence: wxWidgets licence

#ifndef DATASET_H_
#define DATASET_H_

#include <wx/wxfreechartdefs.h>

#include <time.h>

#include <wx/refobject.h>

#include <wx/observable.h>
#include <wx/chartrenderer.h>
#include <wx/marker.h>

#include <wx/dynarray.h>

class Dataset;
class DateTimeDataset;

#define FOREACH_SERIE(index, dataset) \
    for (size_t index = 0; index < dataset->GetSerieCount(); index++)

#define FOREACH_DATAITEM(index, serie, dataset) \
    for (size_t index = 0; index < dataset->GetCount(serie); index++)

class WXDLLIMPEXP_FREECHART DatasetObserver
{
public:
    DatasetObserver();
    virtual ~DatasetObserver();

    virtual void DatasetChanged(Dataset *dataset) = 0;
};

class WXDLLIMPEXP_FREECHART Dataset : public wxObject,
    public RefObject, public Observable<DatasetObserver>, public DrawObserver
{
    DECLARE_CLASS(Dataset)
public:
    Dataset();
    virtual ~Dataset();

    void SetRenderer(Renderer *renderer);

    Renderer *GetBaseRenderer();

    void BeginUpdate();

    void EndUpdate();

    virtual size_t GetSerieCount() = 0;

    virtual size_t GetCount(size_t serie) = 0;

    virtual wxString GetSerieName(size_t serie) = 0;

    virtual double GetMinValue(bool vertical) = 0;

    virtual double GetMaxValue(bool vertical) = 0;

    virtual DateTimeDataset *AsDateTimeDataset();

    void AddMarker(Marker *marker);

    size_t GetMarkersCount();

    Marker *GetMarker(size_t index);

    //
    // DrawObjectObserver
    //
    // Received from renderer, or marker
    virtual void NeedRedraw(DrawObject *obj);

protected:
    virtual bool AcceptRenderer(Renderer *r) = 0;

    void DatasetChanged();

    Renderer *m_renderer;
private:
    bool m_updating;
    bool m_changed;

    MarkerArray m_markers;

    FIRE_WITH_THIS(DatasetChanged);
};

class WXDLLIMPEXP_FREECHART DateTimeDataset
{
public:
    DateTimeDataset();
    virtual ~DateTimeDataset();

    virtual time_t GetDate(size_t index) = 0;

    virtual size_t GetCount() = 0;
};

WX_DECLARE_USER_EXPORTED_OBJARRAY(Dataset *, DatasetArrayBase, WXDLLIMPEXP_FREECHART);

class WXDLLIMPEXP_FREECHART DatasetArray : public DatasetArrayBase
{
public:
    DatasetArray();
    virtual ~DatasetArray();

    void Add(Dataset *dataset);

    void Remove(Dataset *dataset);

    void RemoveAt(size_t index, size_t count = 1);
};

#endif /*DATASET_H_*/