Inheritance diagram for plComponentDragDropHandler:

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Protected Member Functions
void	CreateDropObject (const plVec3 &vPosition, const char szType, const char szProperty, const plVariant &value, plUuid parent, plInt32 iInsertChildIndex)

void	AttachComponentToObject (const char szType, const char szProperty, const plVariant &value, plUuid ObjectGuid)

void	MoveObjectToPosition (const plUuid &guid, const plVec3 &vPosition, const plQuat &qRotation)

void	MoveDraggedObjectsToPosition (plVec3 vPosition, bool bAllowSnap, const plVec3 &normal)

void	SelectCreatedObjects ()

void	BeginTemporaryCommands ()

void	EndTemporaryCommands ()

void	CancelTemporaryCommands ()

virtual void	OnDragBegin (const plDragDropInfo *pInfo) override
	Called shortly after CanHandle returned true to begin handling a drag operation.

virtual void	OnDragUpdate (const plDragDropInfo *pInfo) override
	Called to update the drag operation with the latest state.

virtual void	OnDragCancel () override
	Called when the drag operation leaves the designated area. The handler will be destroyed after this. It should clean up all temporary objects that it created before.

virtual void	OnDrop (const plDragDropInfo *pInfo) override
	Final call to finish the drag & drop operation. Handler is destroyed after this.

virtual float	CanHandle (const plDragDropInfo *pInfo) const override
	Used to ask a handler whether it knows how to handle a certain drag & drop situation.

Protected Member Functions inherited from plAssetDragDropHandler
bool	IsAssetType (const plDragDropInfo *pInfo) const

plString	GetAssetGuidString (const plDragDropInfo *pInfo) const

plUuid	GetAssetGuid (const plDragDropInfo *pInfo) const

plString	GetAssetsDocumentTypeName (const plUuid &assetTypeGuid) const

bool	IsSpecificAssetType (const plDragDropInfo pInfo, const char szType) const

Protected Member Functions inherited from plDragDropHandler
virtual void	RequestConfiguration (plDragDropConfig *pConfigToFillOut)
	Potentially called by the drag drop target to request information about how to determine the plDragDropInfo data.

Protected Attributes
plDocument *	m_pDocument

plHybridArray< plUuid, 16 >	m_DraggedObjects

plVec3	m_vAlignAxisWithNormal = plVec3::MakeZero()

Protected Attributes inherited from plAssetDragDropHandler
plDocument *	m_pDocument

Additional Inherited Members
Public Member Functions inherited from plReflectedClass
virtual const plRTTI *	GetDynamicRTTI () const

bool	IsInstanceOf (const plRTTI *pType) const
	Returns whether the type of this instance is of the given type or derived from it.

template<typename T >
PL_ALWAYS_INLINE bool	IsInstanceOf () const
	Returns whether the type of this instance is of the given type or derived from it.

Static Public Member Functions inherited from plDragDropHandler
static bool	IsHandlerActive ()
	Returns whether the last call to BeginDragDropOperation() was successful and a handler is now in effect.

static bool	BeginDragDropOperation (const plDragDropInfo pInfo, plDragDropConfig pConfigToFillOut=nullptr)
	Call this when a drag enter event occurs. Return value indicates whether a plDragDropHandler was found to handle the operation. If not, subsequent drag & drop updates are ignored.

static void	UpdateDragDropOperation (const plDragDropInfo *pInfo)
	Call this when a drag event occurs. Ignored if BeginDragDropOperation() was not successful.

static void	FinishDragDrop (const plDragDropInfo *pInfo)
	Call this when a drop event occurs. Ignored if BeginDragDropOperation() was not successful.

static void	CancelDragDrop ()
	Call this when a drag leave event occurs. Ignored if BeginDragDropOperation() was not successful.

static bool	CanDropOnly (const plDragDropInfo *pInfo)
	For targets that do not support full dragging, but only dropping on a single target, this allows to query whether there is a handler for the given target. See also DropOnly().

static bool	DropOnly (const plDragDropInfo *pInfo)
	Executes a complete drop action on a target that does not support continuous dragging. See also CanDropOnly().

Static Public Member Functions inherited from plNoBase
static const plRTTI *	GetStaticRTTI ()

Member Function Documentation

◆ CanHandle()

float plComponentDragDropHandler::CanHandle ( const plDragDropInfo * pInfo ) const

overrideprotectedvirtual

Used to ask a handler whether it knows how to handle a certain drag & drop situation.

The return value is a priority. By default CanHandle should return 0 or 1. To override an existing handler, values larger than 1 may be returned to take precedence.

Implements plDragDropHandler.

◆ OnDragBegin()

void plComponentDragDropHandler::OnDragBegin ( const plDragDropInfo * pInfo )

overrideprotectedvirtual

Called shortly after CanHandle returned true to begin handling a drag operation.

Implements plDragDropHandler.

◆ OnDragCancel()

void plComponentDragDropHandler::OnDragCancel ( )

overrideprotectedvirtual

Called when the drag operation leaves the designated area. The handler will be destroyed after this. It should clean up all temporary objects that it created before.

Implements plDragDropHandler.