UIGizmo.hpp

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//
//  CeresEngine - A game development framework
//
//  Created by Rogiel Sulzbach.
//  Copyright (c) 2018-2023 Rogiel Sulzbach. All rights reserved.
//
 
#pragma once
 
#include "UIControl.hpp"
#include "UIView.hpp"
 
#include "CeresEngine/Foundation/Event.hpp"
 
#include "CeresEngine/Math/Geometry.hpp"
#include "CeresEngine/Math/Transform.hpp"
 
namespace CeresEngine {
 
    class UIViewport;
 
    class UIGizmo;
    class UIGizmoArrowManipulator;
    class UIGizmoCircleManipulator;
 
    class UIGizmo : public UIView {
        using super = UIView;
 
    public:
        Transform mTransform;
 
        Transform mViewTransform;
 
        UIViewport* mViewport;
 
    public:
        Event<void(const Transform&)> didChangeTransform;
 
    public:
        UIGizmo();
 
    public: // Transforms
        const Transform& getTransform() const noexcept { return mTransform; }
 
        void setTransform(const Transform& transform);
 
        const Transform& getViewTransform() const noexcept { return mViewTransform; }
 
        void setViewTransform(const Transform& viewTransform);
 
    public: // UIView
        // \copydoc UIView::mouseEntered
        void mouseEntered(const CeresEngine::UIMouseEvent &event) override;
    };
 
    class UITranslationGizmo : public UIGizmo {
    private:
        UIGizmoArrowManipulator* mXManipulator;
 
        UIGizmoArrowManipulator* mYManipulator;
 
        UIGizmoArrowManipulator* mZManipulator;
 
        //        UIGizmoPlaneManipulator* mXYManipulator;
        //        UIGizmoPlaneManipulator* mXZManipulator;
        //        UIGizmoPlaneManipulator* mYZManipulator;
 
    public:
        UITranslationGizmo();
        ~UITranslationGizmo() override;
    };
 
    class UIRotationGizmo : public UIGizmo {
    private:
        UIGizmoCircleManipulator* mXManipulator;
 
        UIGizmoCircleManipulator* mYManipulator;
 
        UIGizmoCircleManipulator* mZManipulator;
 
    public:
        UIRotationGizmo();
        ~UIRotationGizmo() override;
    };
 
    class UIScalingGizmo : public UIGizmo {
    public:
        UIScalingGizmo();
        ~UIScalingGizmo() override;
    };
 
    // ---------------------------------------------------------------------------------------------
 
    class UIGizmoManipulator : public UIControl {
        using super = UIControl;
 
    protected:
        UIGizmo* mGizmo;
 
    public:
        using super::super;
 
    public: // UIView
        void didMoveToSuperView(UIView* superView) override;
 
        // \copydoc UIView::mouseEntered
        void mouseEntered(const UIMouseEvent& event) override;
 
    protected:
        [[nodiscard]] AffineTransform getSceneToLocalTransform() const;
    };
 
    class UIGizmoArrowManipulator : public UIGizmoManipulator {
        using super = UIGizmoManipulator;
 
    private:
        BezierPath mPath;
 
        UIColor mColor;
 
        Vector3 mAxis = Vector3(0, 0, 0);
        Vector3 mOriginalPosition;
 
    public:
        UIGizmoArrowManipulator(const UIColor& color, const Vector3& axis);
 
    public:
        void draw(UIGraphicsContext& context, const UIRect& dirtyRect) override;
 
        bool isPointInside(const UIPoint& point, const Optional<const UIEvent&>& event) override;
 
        void mouseDown(const UIMouseEvent& event) override;
 
        void mouseDragged(const UIMouseEvent& event) override;
    };
 
    class UIGizmoCircleManipulator : public UIGizmoManipulator {
        using super = UIGizmoManipulator;
 
    private:
        BezierPath mPath;
 
        UIColor mColor;
 
        Vector3 mAxis = Vector3(0, 0, 0);
        Quaternion mOriginalRotation;
        Vector3 mOriginalDirection;
 
    public:
        UIGizmoCircleManipulator(const UIColor& color, const Vector3& axis);
 
    public:
        void draw(UIGraphicsContext& context, const UIRect& dirtyRect) override;
 
        bool isPointInside(const UIPoint& point, const Optional<const UIEvent&>& event) override;
 
        void mouseDown(const UIMouseEvent& event) override;
 
        void mouseDragged(const UIMouseEvent& event) override;
    };
 
} // namespace CeresEngine