ClickRegion.h

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// ClickRegion.h
//
// Copyright (c) 2013, 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 "UiViewModel.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;
    }
}

namespace HoverRace {
namespace Display {

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

public:
    struct Props
    {
        enum {
            SIZE = SUPER::Props::NEXT_,
            ENABLED,
            PRESSED,
            NEXT_,  
        };
    };

public:
    ClickRegion(Display &display, uiLayoutFlags_t layoutFlags = 0);
    ClickRegion(Display &display, const Vec2 &size,
        uiLayoutFlags_t layoutFlags = 0);
    virtual ~ClickRegion();

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

public:
    bool OnMouseMoved(const Vec2 &pos) override;
    bool OnMousePressed(const Control::Mouse::Click &click) override;
    bool OnMouseReleased(const Control::Mouse::Click &click) override;
    bool OnAction() override;

protected:
    virtual void OnMouseDrag(const Vec2 &relPos) { HR_UNUSED(relPos); }

public:
    using clickedSignal_t = boost::signals2::signal<void(ClickRegion&)>;
    clickedSignal_t &GetClickedSignal() { return clickedSignal; }
protected:
    virtual void FireClickedSignal();

public:
    bool TryFocus(const Control::Nav &nav = Control::Nav::NEUTRAL) override;

    const Vec2 &GetSize();
    void SetSize(const Vec2 &size);
    void SetSize(double w, double h) { SetSize(Vec2(w, h)); }

    bool IsAutoSize() const { return autoSize; }
    void SetAutoSize();

    bool IsEnabled() const { return enabled; }
    void SetEnabled(bool enabled);

protected:
    bool IsPressed() const { return pressed; }
    void SetPressed(bool pressed);

public:
    Vec3 Measure() override { return size.Promote(); }

protected:
    void RequestSizing();
    bool TestHit(const Vec2 &pos);
    Vec2 ScreenPosToRel(const Vec2 &pos);

protected:
    Display &display;
private:
    Vec2 size;
    bool autoSize;
    bool needsSizing;
    bool enabled;
    bool pressed;
    clickedSignal_t clickedSignal;
};

}  // namespace Display
}  // namespace HoverRace

#undef MR_DllDeclare