CUIDraggable.h

/*
!@
MIT License
 
Copyright (c) 2024 Skylicht Technology CO., LTD
 
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files
(the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify,
merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so,
subject to the following conditions:
 
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
 
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
This file is part of the "Skylicht Engine".
https://github.com/skylicht-lab/skylicht-engine
!#
*/
 
#pragma once
 
#include "CUIBase.h"
 
namespace Skylicht
{
    namespace UI
    {
        class CUIDraggable : public CUIBase
        {
        protected:
            core::vector2df m_offset;
            core::vector3df m_oldPosition;
 
            bool m_lockX;
            bool m_lockY;
 
            bool m_limitDragToRect;
            core::rectf m_bounds;
 
        public:
            std::function<void(CUIDraggable*, float posX, float posY)> OnBeginDrag;

            std::function<void(CUIDraggable*, float posX, float posY)> OnDrag;

            std::function<void(CUIDraggable*, float posX, float posY)> OnEndDrag;
 
        public:
            CUIDraggable(CUIContainer* container, CGUIElement* element);
 
            virtual ~CUIDraggable();

            inline void lock(bool x, bool y)
            {
                m_lockX = x;
                m_lockY = y;
            }

            inline void limitDragToRect(bool b)
            {
                m_limitDragToRect = b;
            }

            inline void setBounds(const core::rectf& r)
            {
                m_bounds = r;
            }
 
        protected:
 
            virtual void onPointerDown(int pointerId, float pointerX, float pointerY);
 
            virtual void onPointerUp(int pointerId, float pointerX, float pointerY);
 
            virtual void onPointerMove(int pointerId, float pointerX, float pointerY);

            virtual void updateDrag();

            virtual void onBeginDrag();

            virtual void onEndDrag();
        };
    }
}