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  3. STrackAreaView

STrackAreaView

The area where tracks( rows of sections ) are displayed.

Unreal Engine C++ API Reference > Editor > SequencerCore > MVVM > Views

Inheritance Hierarchy

References

   
Module SequencerCore
Header /Engine/Source/Editor/SequencerCore/Public/MVVM/Views/STrackAreaView.h
Include #include "MVVM/Views/STrackAreaView.h"

Syntax

class STrackAreaView : public SPanel

Remarks

The area where tracks( rows of sections ) are displayed.

Variables

  Type Name Description
Protected variable bool bAllowDrop Whether the dropped node is allowed to be dropped onto
Protected variable bool bIsPinned Whether this TrackArea is pinned to another TrackArea and should skip updating external controls
Protected variable bool bShowPinnedNodes Whether this TrackArea is for pinned nodes or non-pinned nodes
Protected variable TOptional< TRange< FFrameNumber > > DropFrameRange The frame range of the section about to be dropped
Protected variable FInputHandlerStack InputStack Input handler stack responsible for routing input to the different handlers
Protected variable FTrackAreaViewLayers LayerIds  
Protected variable TOptional< FVector2D > SizeLastFrame Keep a hold of the size of the area so we can maintain zoom levels.
Protected variable TSharedPtr< FTimeToPixel > TimeToPixel  
Protected variable TMap< TWeakViewModelPtr< IOutlinerExtension >, TWeakPtr< STrackLane > > TrackSlots A map of child slot content that exist in our view.
Protected variable float VirtualTop  
Protected variable TWeakViewModelPtr< IOutlinerExtension > WeakDroppedItem Weak pointer to the dropped node
Protected variable TWeakPtr< SOutlinerView > WeakOutliner Weak pointer to the outliner view (used for scrolling interactions).
Protected variable TWeakPtr< FTrackAreaViewModel > WeakViewModel Weak pointer to the track area view model.

Constructors

  Type Name Description
Public function    

Destructors

  Type Name Description
Public function    

Functions

  Type Name Description
Public function void

AddTrackSlot ( const TViewModelPtr< IOutlinerExtension >& InDataModel,
const TSharedPtr< STrackLane >& InSlot
)

 Add a new track slot to this area for the given node.
Public function Static FLinearColor  
Public function void

Construct ( const FArguments& InArgs,
TWeakPtr< FTrackAreaViewModel > InWeakViewModel
)

 Construct this widget
Public function void

Empty ()

 Empty the track area
Public function TSharedPtr< STrackLane >

FindTrackSlot ( const TViewModelPtr< IOutlinerExtension >& InDataModel
)

 Attempt to find an existing slot relating to the given node
Public function Const TWeakPtr< SOutlinerView >  
Public function Const const FTrackAreaViewLayers &  
Public function Const TSharedPtr< FTimeToPixel >  
Public function Const TSharedPtr< FTrackAreaViewModel >  
Public function Const bool  
Protected function Virtual void

OnResized ( const FVector2D& OldSize,
const FVector2D& NewSize
)

  
Public function void

SetIsPinned ( bool bInIsPinned
)

 Set whether this TrackArea is pinned to another TrackArea and should skip updating external controls
Public function void

SetOutliner ( const TSharedPtr< SOutlinerView >& InOutliner
)

 Assign a tree view to this track area.
Public function void

SetShowPinned ( bool bShowPinned
)

 Set whether this TrackArea should show only pinned nodes or only non-pinned nodes
Public function void

SetVirtualPosition ( float InVirtualTop
)

  
Public function Const bool  
Protected function Virtual void

UpdateHoverStates ( const FGeometry& MyGeometry,
const FPointerEvent& MouseEvent
)

 Update any hover state required for the track area

Overridden from SWidget

  Type Name Description
Public function Virtual Const FVector2D

ComputeDesiredSize ( float
)

 A Panel's desired size in the space required to arrange of its children on the screen while respecting all of the children's desired sizes and any layout-related options specified by the user.
Public function Virtual FChildren * All widgets must provide a way to access their children in a layout-agnostic way.
Public function Virtual Const void

OnArrangeChildren ( const FGeometry& AllottedGeometry,
FArrangedChildren& ArrangedChildren
)

 Panels arrange their children in a space described by the AllottedGeometry parameter.
Public function Virtual Const FCursorReply

OnCursorQuery ( const FGeometry& MyGeometry,
const FPointerEvent& CursorEvent
)

 The system asks each widget under the mouse to provide a cursor. This event is bubbled.
Public function Virtual void

OnDragEnter ( const FGeometry& MyGeometry,
const FDragDropEvent& DragDropEvent
)

 DRAG AND DROP (DragDrop) Called during drag and drop when the drag enters a widget.
Public function Virtual void

OnDragLeave ( const FDragDropEvent& DragDropEvent
)

 Called during drag and drop when the drag leaves a widget.
Public function Virtual FReply

OnDragOver ( const FGeometry& MyGeometry,
const FDragDropEvent& DragDropEvent
)

 Called during drag and drop when the the mouse is being dragged over a widget.
Public function Virtual FReply

OnDrop ( const FGeometry& MyGeometry,
const FDragDropEvent& DragDropEvent
)

 Called when the user is dropping something onto a widget; terminates drag and drop.
Public function Virtual FReply

OnKeyDown ( const FGeometry& MyGeometry,
const FKeyEvent& InKeyEvent
)

 Called after a key is pressed when this widget has focus (this event bubbles if not handled)
Public function Virtual FReply

OnKeyUp ( const FGeometry& MyGeometry,
const FKeyEvent& InKeyEvent
)

 Called after a key is released when this widget has focus
Public function Virtual FReply

OnMouseButtonDown ( const FGeometry& MyGeometry,
const FPointerEvent& MouseEvent
)

 MOUSE INPUT The system calls this method to notify the widget that a mouse button was pressed within it.
Public function Virtual FReply

OnMouseButtonUp ( const FGeometry& MyGeometry,
const FPointerEvent& MouseEvent
)

 The system calls this method to notify the widget that a mouse button was release within it.
Public function Virtual void

OnMouseCaptureLost ( const FCaptureLostEvent& CaptureLostEvent
)

 Called when this widget had captured the mouse, but that capture has been revoked for some reason.
Public function Virtual void

OnMouseEnter ( const FGeometry& MyGeometry,
const FPointerEvent& MouseEvent
)

 The system will use this event to notify a widget that the cursor has entered it.
Public function Virtual void

OnMouseLeave ( const FPointerEvent& MouseEvent
)

 The system will use this event to notify a widget that the cursor has left it.
Public function Virtual FReply

OnMouseMove ( const FGeometry& MyGeometry,
const FPointerEvent& MouseEvent
)

 The system calls this method to notify the widget that a mouse moved within it.
Public function Virtual FReply

OnMouseWheel ( const FGeometry& MyGeometry,
const FPointerEvent& MouseEvent
)

 Called when the mouse wheel is spun. This event is bubbled.
Public function Virtual Const int32

OnPaint ( const FPaintArgs& Args,
const FGeometry& AllottedGeometry,
const FSlateRect& MyCullingRect,
FSlateWindowElementList& OutDrawElements,
int32 LayerId,
const FWidgetStyle& InWidgetStyle,
bool bParentEnabled
)

 The widget should respond by populating the OutDrawElements array with FDrawElements that represent it and any of its children.
Public function Virtual Const bool Checks to see if this widget supports keyboard focus. Override this in derived classes.
Public function Virtual void

Tick ( const FGeometry& AllottedGeometry,
const double InCurrentTime,
const float InDeltaTime
)

 Ticks this widget with Geometry.

Classes

  Type Name Description
Public struct FArguments    

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