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#include "fsCDragDropComponent.h"

#include <fsCore/src/debug/fsAssert.h>

#include <fsRenderer/src/components/fsCSpriteComponent.h>

#include "../../src/fsCEntity.h"
#include "../../src/fsCEntityFactory.h"
#include "../../src/fsCGuiMessageDispatcher.h"
#include "fsRenderer/src/fsCBrush.h"
#include "fsRenderer/src/fsCLine.h"

const fsCUniqueId fsCDragDropComponent::mTypeId("fsCDragDropComponent");

const fsCUniqueId fsCDragDropComponent::mDragEndMsg("DragDropCompDragEnd");
#ifdef COLLISION_DEBUG_MESSAGES
	const fsCUniqueId fsCDragDropComponent::mDragingMsg("DragDropCompDragging");
#endif

void fsCDragDropComponent::dragStart(const fsPoint& pPos, fsS32 pPointerIndexForDrag)
{
	fsAssert(( eSTATE_NOT_IN_GESTURE == mGestureState && 0 == mNumPointsDown ),
	         "dragStart() should be called immediately after creating the DragDropComponent.\n");
	mGestureState = eSTATE_IN_DRAG_GESTURE;
	mGesturePoints[pPointerIndexForDrag].mInGesture = true;
	mGesturePoints[pPointerIndexForDrag].mPrevPos = pPos;
	mNumPointsDown = 1;

	spritePositionSet(fsPoint(pPos.x, pPos.y + mTouchFingerVerticalOffset));

	fsIInputManager::instanceGet()->priorityListenerRegister(this);
}

void fsCDragDropComponent::onDragMove(const fsPoint& pCurrPos)
{
	spritePositionSet(fsPoint(pCurrPos.x, pCurrPos.y + mTouchFingerVerticalOffset));
#ifdef COLLISION_DEBUG_MESSAGES
	fsCGuiMessageDispatcher::instanceGet()->messageDispatch(mDragingMsg, fsIMessageDispatcher::mNullParam);
#endif
}

void fsCDragDropComponent::onDragEnd(const fsPoint& pEndPos)
{
	fsCGuiMessageDispatcher::instanceGet()->messageDispatch(mDragEndMsg, fsIMessageDispatcher::mNullParam);
	spritePositionSet(pEndPos);
}

void fsCDragDropComponent::spritePositionSet(const fsPoint& pCurrPos) const
{
	fsVec2d localPos;
	parentGet()->parentGet()->screenCoordConvertToLocal(pCurrPos, localPos);
	parentGet()->posSet(localPos + mOffset);
}

fsBool fsCDragDropComponent::acceptingInputGet() const
{
	return true;
}
void fsCDragDropComponent::matrixApplyDo()
{
#ifdef COLLISION_DEBUG_RENDERING
	mLine->matrixApply(parentGet()->renderMatrixGet());
#endif
}

void fsCDragDropComponent::renderDo() {
#ifdef COLLISION_DEBUG_RENDERING
		mLine->render();
#endif
}

fsCEntity* fsCDragDropComponent::dragDropEntityCreate(const fsStr& pEntName, std::shared_ptr<fsCBrush> pBrush,
                                                      fsCEntity* const pEnt, const fsPoint& pOffset)
{
	fsCEntity* dragDropEnt = pEnt->entityFactoryGet()->emptyEntityCreate(pEntName);

	fsISpriteComponent* sprComp = dragDropEnt->spriteComponentAdd();
	sprComp->brushSet(pBrush);

	fsCDragDropComponent* dragDropComp = dragDropEnt->componentAdd<fsCDragDropComponent>();

	dragDropEnt->posSet(pEnt->posGet());
	dragDropComp->mOffset = pOffset;

#ifdef COLLISION_DEBUG_RENDERING
	dragDropComp->mLine = new fsCLine(std::vector<fsVec2d>());
	auto brushSize = pEnt->spriteComponentGet()->brushGet()->dimensionsGet();
	// dragDropComp->mLine->vertSet(std::vector<fsVec2d>{
	// 	fsVec2d(-brushSize.x / 2.0, -brushSize.y / 2.0),
	// 	fsVec2d(brushSize.x / 2.0, -brushSize.y / 2.0f),
	//
	// 	fsVec2d(brushSize.x / 2.0, -brushSize.y / 2.0),
	// 	fsVec2d(brushSize.x / 2.0, brushSize.y / 2.0),
	//
	// 	fsVec2d(brushSize.x / 2.0, brushSize.y / 2.0),
	// 	fsVec2d(-brushSize.x / 2.0, brushSize.y / 2.0),
	//
	// 	fsVec2d(-brushSize.x / 2.0, brushSize.y / 2.0),
	// 	fsVec2d(-brushSize.x / 2.0, -brushSize.y / 2.0),
	// });
	// dragDropComp->mLine->colourSet(fsSColour(0.0f, 1.0f, 0.0f, 1.0f ));
#endif
	return dragDropEnt;
}

fsIComponent* fsCDragDropComponent::create(fsCEntity* pParent)
{
	return new fsCDragDropComponent(pParent);
}

fsCDragDropComponent::fsCDragDropComponent(fsCEntity* const pParent) :
#ifdef COLLISION_DEBUG_RENDERING
	mLine(nullptr),
#endif
	fsIGestureHandlingComponent(pParent, false, true, false),
	mTouchFingerVerticalOffset(fsIInputManager::ePOINTER_TYPE_MOUSE == fsIInputManager::instanceGet()->pointerTypeGet()
       ? 0
       :
#if defined fsINVERTED_Y_AXIS
	90
#else
	-90
#endif
	)
{
}

fsCDragDropComponent::~fsCDragDropComponent()
{
#ifdef COLLISION_DEBUG_RENDERING
	delete mLine;<--- Class 'fsCDragDropComponent' does not have a copy constructor which is recommended since it has dynamic memory/resource management.<--- Class 'fsCDragDropComponent' does not have a operator= which is recommended since it has dynamic memory/resource management.
#endif
}