Slider.h

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// Slider.h
//
// Copyright (c) 2014-2016 Michael Imamura.
//
// Licensed under GrokkSoft HoverRace SourceCode License v1.0(the "License");
// you may not use this file except in compliance with the License.
//
// A copy of the license should have been attached to the package from which
// you have taken this file. If you can not find the license you can not use
// this file.
//
//
// The author makes no representations about the suitability of
// this software for any purpose.  It is provided "as is" "AS IS",
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
// implied.
//
// See the License for the specific language governing permissions
// and limitations under the License.

#pragma once

#include "ClickRegion.h"

#if defined(_WIN32) && defined(HR_ENGINE_SHARED)
#   ifdef MR_ENGINE
#       define MR_DllDeclare   __declspec( dllexport )
#   else
#       define MR_DllDeclare   __declspec( dllimport )
#   endif
#else
#   define MR_DllDeclare
#endif

namespace HoverRace {
    namespace Display {
        class Display;
        class FillBox;
        class Label;
        class RuleLine;
    }
}

namespace HoverRace {
namespace Display {

class MR_DllDeclare Slider : public ClickRegion
{
    using SUPER = ClickRegion;

public:
    struct Props
    {
        enum {
            VALUE = SUPER::Props::NEXT_,
            NEXT_,  
        };
    };

public:
    Slider(Display &display, double min, double max, double step,
        uiLayoutFlags_t layoutFlags = 0);
    virtual ~Slider();

public:
    void AttachView(Display &disp) override { AttachViewDynamic(disp, this); }

public:
    bool OnNavigate(const Control::Nav &nav) override;
protected:
    void OnMouseDrag(const Vec2 &relPos) override;

public:
    using valueChangedSignal_t = boost::signals2::signal<void(double)>;
    valueChangedSignal_t &GetValueChangedSignal() { return valueChangedSignal; }

public:
    double GetMin() const { return min; }
    double GetMax() const { return max; }
    double GetStep() const { return step; }

    double GetValue() const { return value; }
    void SetValue(double value);

    FillBox *GetBackgroundChild() const { return background.get(); }
    FillBox *GetIndicatorChild() const { return indicator.get(); }
    RuleLine *GetZeroLineChild() const { return zeroLine.get(); }

protected:
    void Layout() override;

public:
    Vec3 Measure() override;
    void FireModelUpdate(int prop) override;

private:
    double min;
    double max;
    double step;
    double value;

    valueChangedSignal_t valueChangedSignal;

    std::unique_ptr<FillBox> background;
    std::unique_ptr<FillBox> indicator;
    std::unique_ptr<RuleLine> zeroLine;
};

}  // namespace Display
}  // namespace HoverRace

#undef MR_DllDeclare