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> Unreal Engine API Reference > Editor > UnrealEd > FMouseDeltaTracker

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FMouseDeltaTracker

Keeps track of mouse movement deltas in the viewports.

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Linux

References

Module	UnrealEd
Header	/Engine/Source/Editor/UnrealEd/Public/MouseDeltaTracker.h
Include	#include "MouseDeltaTracker.h"

Syntax

class FMouseDeltaTracker

Remarks

Keeps track of mouse movement deltas in the viewports.

Constructors

	Name	Description
	FMouseDeltaTracker()

Destructors

	Name	Description
	~FMouseDeltaTracker()

Functions

	Name	Description
void	AbsoluteTranslationConvertMouseToDragRot ( FSceneView* InView, FEditorViewportClient* InViewp..., FVector& OutDrag, FRotator& OutRotation, FVector& OutScale )	Absolute Translation conversion from mouse position on the screen to widget axis movement/rotation.
void	AddDelta ( FEditorViewportClient* InViewp..., FKey InKey, const int32 InDelta, bool InNudge )	Adds delta movement into the tracker.
void	ConvertMovementDeltaToDragRot ( FSceneView* InView, FEditorViewportClient* InViewp..., FVector& InDragDelta, FVector& OutDrag, FRotator& OutRotation, FVector& OutScale )	Converts the delta movement to drag/rotation/scale based on the viewport type or widget axis.
bool	EndTracking ( FEditorViewportClient* InViewp... )	Called when a mouse button has been released.
const FVecto...	GetAbsoluteDelta()	Returns the absolute delta since dragging started.
const FVecto...	GetAbsoluteDeltaSnapped()	Returns the absolute snapped delta since dragging started.
const FVecto...	GetDelta()	Returns the current delta.
const FVecto...	GetDeltaSnapped()	Returns the current snapped delta.
const FVecto...	GetDragStartPos()	Returns the unsnapped start position of the current mouse drag.
const FVecto...	GetRawDelta()	Returns the raw mouse delta in pixels since dragging started.
const FVecto...	GetScreenDelta()	Returns the screen space delta since dragging started.
FWidget::EWi...	GetTrackingWidgetMode()
const bool	GetUsedDragModifier()	Returns if the user used a modifier to drag a selected item. (Rather than using a widget handle)
bool	HasReceivedDelta()
void	ReduceBy ( const FVector& In )	Subtracts the specified value from End and EndSnapped.
void	Render3DDragTool ( const FSceneView* View, FPrimitiveDrawInterface* PDI )	Renders the drag tool. Does nothing if no drag tool exists.
void	RenderDragTool ( const FSceneView* View, FCanvas* Canvas )	Renders the drag tool. Does nothing if no drag tool exists.
void	ResetUsedDragModifier()	Resets the UsedDragModifier flag
void	SetExternalMovement()	Marks that something caused the equivalent of mouse dragging, but with other means (keyboard short cut, mouse wheel).
void	StartTracking ( FEditorViewportClient* InViewp..., const int32 InX, const int32 InY, const FInputEventState& InInputSta..., bool bNudge, bool bResetDragToolState )	Begin tracking at the specified location for the specified viewport.
bool	UsingDragTool()
bool	WasExternalMovement()

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