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  3. FMouseDeltaTracker

FMouseDeltaTracker

Keeps track of mouse movement deltas in the viewports.

Unreal Engine C++ API Reference > Editor > UnrealEd

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

  Type Name Description
Public function    

Destructors

  Type Name Description
Public function    

Functions

  Type Name Description
Public function Const void

AbsoluteTranslationConvertMouseToDragRot ( FSceneView* InView,
FEditorViewportClient* InViewportClient,
FVector& OutDrag,
FRotator& OutRotation,
FVector& OutScale
)

 Absolute Translation conversion from mouse position on the screen to widget axis movement/rotation.
Public function void

AddDelta ( FEditorViewportClient* InViewportClient,
FKey InKey,
const int32 InDelta,
bool InNudge
)

 Adds delta movement into the tracker.
Public function Const void

ConvertMovementDeltaToDragRot ( FSceneView* InView,
FEditorViewportClient* InViewportClient,
FVector& InDragDelta,
FVector& OutDrag,
FRotator& OutRotation,
FVector& OutScale
)

 Converts the delta movement to drag/rotation/scale based on the viewport type or widget axis.
Public function bool

EndTracking ( FEditorViewportClient* InViewportClient
)

 Called when a mouse button has been released.
Public function Const const FVector Returns the absolute delta since dragging started.
Public function Const const FVector Returns the absolute snapped delta since dragging started.
Public function Const const FVector Returns the current delta.
Public function Const const FVector Returns the current snapped delta.
Public function Const const FVector Returns the unsnapped start position of the current mouse drag.
Public function Const const FVector Returns the raw mouse delta in pixels since dragging started.
Public function Const const FVector Returns the screen space delta since dragging started.
Public function Const UE::Widget::EWidgetMode  
Public function Const const bool Returns if the user used a modifier to drag a selected item. (Rather than using a widget handle)
Public function Const bool  
Public function void

ReduceBy ( const FVector& In
)

 Subtracts the specified value from End and EndSnapped.
Public function void Renders the drag tool. Does nothing if no drag tool exists.
Public function void

RenderDragTool ( const FSceneView* View,
FCanvas* Canvas
)

 Renders the drag tool. Does nothing if no drag tool exists.
Public function void Resets the UsedDragModifier flag
Public function void Marks that something caused the equivalent of mouse dragging, but with other means (keyboard short cut, mouse wheel).
Public function void

StartTracking ( FEditorViewportClient* InViewportClient,
const int32 InX,
const int32 InY,
const FInputEventState& InInputState,
bool bNudge,
bool bResetDragToolState
)

 Begin tracking at the specified location for the specified viewport.
Public function Const bool  
Public function Const bool  

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