barrenderer.h

// Name:    barrenderer.h
// Purpose: bar renderer and bar types declarations
// Author:  Moskvichev Andrey V.
// Created: 14.11.2008
// Copyright:   (c) 2008-2010 Moskvichev Andrey V.
// Licence: wxWidgets licence

#ifndef BARRENDERER_H_
#define BARRENDERER_H_

#include "wx/xy/xyrenderer.h"
#include "wx/areadraw.h"

class CategoryDataset;
class BarRenderer;

class WXDLLIMPEXP_FREECHART BarType
{
public:
    BarType(double base);
    virtual ~BarType();

    virtual void Draw(BarRenderer *barRenderer, wxDC &dc, wxRect rc, Axis *horizAxis, Axis *vertAxis, bool vertical, size_t item, CategoryDataset *dataset);

    //
    // Called from BarRenderer. Don't call from programs.
    //
    virtual double GetMinValue(CategoryDataset *dataset, bool verticalAxis);
    virtual double GetMaxValue(CategoryDataset *dataset, bool verticalAxis);

protected:
    virtual void GetBarGeometry(CategoryDataset *dataset, size_t item, size_t serie,
            int &width, wxCoord &shift, double &base, double &value) = 0;

    double m_base;
};

class WXDLLIMPEXP_FREECHART NormalBarType : public BarType
{
public:
    NormalBarType(int barWidth, int serieGap = 1, double base = 0.0);
    virtual ~NormalBarType();

protected:
    virtual void GetBarGeometry(CategoryDataset *dataset, size_t item, size_t serie,
            int &width, wxCoord &shift, double &base, double &value);

private:
    int m_barWidth;
    int m_serieGap;
};

class WXDLLIMPEXP_FREECHART StackedBarType : public BarType
{
public:
    StackedBarType(int barWidth, double base);
    virtual ~StackedBarType();

    virtual double GetMinValue(CategoryDataset *dataset, bool verticalAxis);
    virtual double GetMaxValue(CategoryDataset *dataset, bool verticalAxis);

protected:
    virtual void GetBarGeometry(CategoryDataset *dataset, size_t item, size_t serie,
            int &width, wxCoord &shift, double &base, double &value);

private:
    int m_barWidth;
};

class WXDLLIMPEXP_FREECHART LayeredBarType : public BarType
{
public:
    LayeredBarType(int initialBarWidth, double base);
    virtual ~LayeredBarType();

protected:
    virtual void GetBarGeometry(CategoryDataset *dataset, size_t item, size_t serie,
            int &width, wxCoord &shift, double &base, double &value);

private:
    int m_initialBarWidth;
};

class WXDLLIMPEXP_FREECHART BarRenderer : public Renderer
{
    DECLARE_CLASS(BarRenderer)
public:
    BarRenderer(BarType *barType);
    virtual ~BarRenderer();

    //
    // Renderer
    //
    virtual void DrawLegendSymbol(wxDC &dc, wxRect rcSymbol, size_t serie);

    void Draw(wxDC &dc, wxRect rc, Axis *horizAxis, Axis *vertAxis, bool vertical, CategoryDataset *dataset);

    void SetBarType(BarType *barType);

    BarType *GetBarType();

    void SetBarDraw(size_t serie, AreaDraw *areaDraw);

    AreaDraw *GetBarDraw(size_t serie);

    double GetMinValue(CategoryDataset *dataset, bool verticalAxis);
    double GetMaxValue(CategoryDataset *dataset, bool verticalAxis);

private:
    BarType *m_barType;

    AreaDrawCollection m_barDraws;
};

#endif /*BARRENDERER_H_*/