/*
 * Copyright 2009, Ingo Weinhold, ingo_weinhold@gmx.de.
 * Distributed under the terms of the MIT License.
 */
#ifndef LEGEND_CHART_AXIS_H
#define LEGEND_CHART_AXIS_H

#include <ObjectList.h>

#include "chart/ChartAxis.h"
#include "chart/ChartDataRange.h"


class ChartAxisLegendSource;
class ChartLegendRenderer;


class LegendChartAxis : public ChartAxis {
public:
                                                                LegendChartAxis(
                                                                        ChartAxisLegendSource* legendSource,
                                                                        ChartLegendRenderer* legendRenderer);
        virtual                                         ~LegendChartAxis();

        virtual void                            SetLocation(ChartAxisLocation location);
        virtual void                            SetRange(const ChartDataRange& range);
        virtual void                            SetFrame(BRect frame);
        virtual BSize                           PreferredSize(BView* view, BSize maxSize);
        virtual void                            Render(BView* view, BRect updateRect);

private:
                        struct LegendInfo;
                        typedef BObjectList<LegendInfo, true> LegendList;
private:
                        void                            _InvalidateLayout();
                        bool                            _ValidateLayout(BView* view);
                        int32                           _EstimateMaxLegendCount(BView* view, BSize size,
                                                                        float* _hSpacing, float* _vSpacing);
        inline  float                           _LegendPosition(double value, float legendSize,
                                                                        float totalSize, double scale);
        inline  void                            _FilterLegends(int32 totalSize, int32 spacing,
                                                                        float BSize::* sizeField);

private:
                        ChartAxisLegendSource* fLegendSource;
                        ChartLegendRenderer* fLegendRenderer;
                        ChartAxisLocation       fLocation;
                        ChartDataRange          fRange;
                        BRect                           fFrame;
                        LegendList                      fLegends;
                        float                           fHorizontalSpacing;
                        float                           fVerticalSpacing;
                        bool                            fLayoutValid;
};


#endif  // LEGEND_CHART_AXIS_H