StateButton.h

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// StateButton.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 "Button.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 Box;
    }
}

namespace HoverRace {
namespace Display {

class MR_DllDeclare StateButton : public Button
{
    using SUPER = Button;

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

public:
    StateButton(Display &display, const std::string &text,
        uiLayoutFlags_t layoutFlags = 0);
    StateButton(Display &display, const Vec2 &size, const std::string &text,
        uiLayoutFlags_t layoutFlags = 0);
    virtual ~StateButton();

public:
    bool IsChecked() const { return checked; }
    void SetChecked(bool checked);

protected:
    void SetStateIcon(bool enabled, bool checked,
        std::shared_ptr<Box> icon)
    {
        icons[{enabled, checked}] = std::move(icon);
        if (enabled == IsEnabled() && checked == IsChecked()) {
            UpdateIcon();
        }
    }

    void UpdateIcon();

public:
    void FireModelUpdate(int prop) override;

private:
    bool checked;

    using iconsKey_t = std::pair<bool, bool>;  
    using iconsVal_t = std::shared_ptr<Box>;
    using icons_t = std::map<iconsKey_t, iconsVal_t>;
    icons_t icons;
};

}  // namespace Display
}  // namespace HoverRace

#undef MR_DllDeclare