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/**
 * @file llstatgraph.h
 * @brief Simpler compact stat graph with tooltip
 *
 * $LicenseInfo:firstyear=2002&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2010, Linden Research, Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation;
 * version 2.1 of the License only.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 * $/LicenseInfo$
 */

#ifndef LL_LLSTATGRAPH_H
#define LL_LLSTATGRAPH_H

#include "llview.h"
#include "llframetimer.h"
#include "v4color.h"
#include "lltrace.h"

class LLStatGraph : public LLView
{
public:
    struct ThresholdParams : public LLInitParam::Block<ThresholdParams>
    {
        Mandatory<F32>  value;
        Optional<LLUIColor> color;

        ThresholdParams()
        :   value("value"),
            color("color", LLColor4::white)
        {}
    };

    struct Thresholds : public LLInitParam::Block<Thresholds>
    {
        Multiple<ThresholdParams> threshold;

        Thresholds()
        :   threshold("threshold")
        {}
    };

    struct StatParams : public LLInitParam::ChoiceBlock<StatParams>
    {
        Alternative<LLTrace::StatType<LLTrace::CountAccumulator>* > count_stat_float;
        Alternative<LLTrace::StatType<LLTrace::EventAccumulator>* > event_stat_float;
        Alternative<LLTrace::StatType<LLTrace::SampleAccumulator>* >    sample_stat_float;
    };

    struct Params : public LLInitParam::Block<Params, LLView::Params>
    {
        Mandatory<StatParams>   stat;
        Optional<std::string>   label,
                                units;
        Optional<S32>           precision;
        Optional<F32>           min,
                                max;
        Optional<bool>          per_sec;
        Optional<F32>           value;

        Optional<Thresholds>    thresholds;

        Params()
        :   stat("stat"),
            label("label"),
            units("units"),
            precision("precision", 0),
            min("min", 0.f),
            max("max", 125.f),
            per_sec("per_sec", true),
            value("value", 0.f),
            thresholds("thresholds")
        {
            Thresholds _thresholds;
            _thresholds.threshold.add(ThresholdParams().value(0.f).color(LLColor4::green))
                                .add(ThresholdParams().value(0.33f).color(LLColor4::yellow))
                                .add(ThresholdParams().value(0.5f).color(LLColor4::red))
                                .add(ThresholdParams().value(0.75f).color(LLColor4::red));
            thresholds = _thresholds;
        }
    };
    LLStatGraph(const Params&);

    void setMin(const F32 min);
    void setMax(const F32 max);

    virtual void draw();

    /*virtual*/ void setValue(const LLSD& value);

private:
    LLTrace::StatType<LLTrace::CountAccumulator>*   mNewStatFloatp;

    bool mPerSec;

    F32 mValue;

    F32 mMin;
    F32 mMax;
    LLFrameTimer mUpdateTimer;
    std::string mLabel;
    std::string mUnits;
    S32 mPrecision; // Num of digits of precision after dot

    struct Threshold
    {
        Threshold(F32 value, const LLUIColor& color)
        :   mValue(value),
            mColor(color)
        {}

        F32 mValue;
        LLUIColor mColor;
        bool operator <(const Threshold& other) const
        {
            return mValue < other.mValue;
        }
    };
    typedef std::vector<Threshold> threshold_vec_t;
    threshold_vec_t mThresholds;
    //S32 mNumThresholds;
    //F32 mThresholds[4];
    //LLColor4 mThresholdColors[4];
};

#endif  // LL_LLSTATGRAPH_H