1. Epic GamesDeveloper
  3. SNodePanel

SNodePanel

API > API/Editor > API/Editor/GraphEditor

Inheritance Hierarchy

References

   
Module GraphEditor
Header /Engine/Source/Editor/GraphEditor/Public/SNodePanel.h
Include #include "SNodePanel.h"

Syntax

class SNodePanel : public SPanel

Variables

  Type Name Description
Protected variable bool bAllowContinousZoomInterpolation Allow continous zoom interpolation?
Protected variable bool bDeferredZoomToNodeExtents Deferred zoom to node extents
Protected variable bool bDeferredZoomToSelection Deferred zoom to selected node extents
Protected variable bool bIsPanning Are we panning the view at the moment?
Protected variable bool bIsZoomingWithTrackpad Are we zooming the view with trackpad at the moment?
Protected variable bool bRequestDeferredPan True if pending request for deferred panning
Protected variable bool bShowSoftwareCursor Whether the software cursor should be drawn
Protected variable bool bTeleportInsteadOfScrollingWhenZoomingToFit Teleport immediately, or smoothly scroll when doing a deferred zoom
Protected variable bool bVisualUpdatePending A flag to detect when a visual update is pending to prevent deferred commands like zoom to fit from running when there are no widgets
Protected variable FGeometry CachedGeometry Cached geometry for use within the active timer
Protected variable TSlotlessChildren< SNode > Children The graph node widgets owned by this panel
Protected variable EGraphRenderingLOD::Type CurrentLOD Current LOD level for nodes/pins
Protected variable const UObject * DeferredMovementTargetObject If non-null and a part of this panel, this node will be brought into view on the next Tick
Protected variable FVector2D DeferredPanPosition Position to pan to
Protected variable TSet< const UObject * > DeferredSelectionTargetObjects If not empty and a part of this panel, this node will be selected and brought into view on the next Tick
Protected variable TAttribute< bool > IsEditable Is the graph editable (can nodes be moved, etc...)?
Protected variable FInputChord LastKeyChordDetected The last key chord detected in this graph panel
Protected variable FMarqueeOperation Marquee A pending marquee operation if it's active
Protected variable FVector2D NodeGrabOffset Where in the title the user grabbed to initiate the drag
Protected variable TMap< UObject *, TSharedRef< SNode > > NodeToWidgetLookup Given a node, find the corresponding widget
Protected variable TWeakPtr< SNode > NodeUnderMousePtr The node that the user is dragging. Null when they are not dragging a node.
Protected variable FVector2D OldViewOffset The position within the graph at which the user was looking last tick
Protected variable float OldZoomAmount The actual scalar zoom amount last tick
Protected variable SGraphEditor::FOnNodeSingleClicked OnNodeSingleClicked Called when the user left clicks on a node without dragging
Protected variable SGraphEditor::FOnSpawnNodeByShortcut OnSpawnNodeByShortcut Invoked when the user may be attempting to spawn a node using a shortcut
Protected variable TMap< TWeakPtr< SNode >, FVector2D > OriginalNodePositions Node positions pre-drag, used to limit transaction creation on drag
Protected variable FVector2D PastePosition The position where we should paste when a user executes the paste command.
Protected variable int32 PreviousZoomLevel Previous Zoom Level
Protected variable TSharedPtr< FScopedTransaction > ScopedTransactionPtr The current transaction for undo/redo
Public variable FGraphSelectionManager SelectionManager Nodes selected in this instance of the editor; the selection is per-instance of the GraphEditor
Protected variable FVector2D SoftwareCursorPosition The current position of the software cursor
Protected variable float TotalGestureMagnify Cumulative magnify delta from trackpad gesture
Protected variable float TotalMouseDelta The total distance that the mouse has been dragged while down
Protected variable float TotalMouseDeltaXY The additive X and Y components of mouse drag (used when zooming)
Protected variable FVector2D ViewOffset The position within the graph at which the user is looking
Protected variable TSlotlessChildren< SNode > VisibleChildren  
Protected variable int32 ZoomLevel How zoomed in/out we are. e.g. 0.25f results in quarter-sized nodes.
Protected variable FCurveSequence ZoomLevelFade Curve that handles fading the 'Zoom +X' text
Protected variable FCurveSequence ZoomLevelGraphFade Fade on zoom for graph
Protected variable TUniquePtr< FZoomLevelsContainer > ZoomLevels The interface for mapping ZoomLevel values to actual node scaling values.
Protected variable float ZoomPadding Zoom selection padding
Protected variable FVector2D ZoomStartOffset Offset in the panel the user started the LMB+RMB zoom from

Constructors

  Type Name Description
Public function    

Functions

  Type Name Description
Protected function Virtual void

AddGraphNode ( const TSharedRef< SNode >& NodeToAdd
)

 Add a slot to the CanvasPanel dynamically
Protected function Static void

ApplyMarqueeSelection ( const FMarqueeOperation& InMarquee,
const FGraphPanelSelectionSet& CurrentSelection,
TSet< TObjectPtr< UObject >>& OutNewSelection
)

 Apply the marquee operation to the current selection
Protected function Virtual Const void

ArrangeChildNodes ( const FGeometry& AllottedGeometry,
FArrangedChildren& ArrangedChildren
)

 Arrange child nodes - allows derived classes to supply non-node children in OnArrangeChildren
Protected function void Cancels any active zoom-to-fit action.
Protected function void

CenterObject ( const UObject* ObjectToCenter
)

 On the next tick, centers the widget associated with the object if it exists
Protected function void

ChangeZoomLevel ( int32 ZoomLevelDelta,
const FVector2D& WidgetSpaceZoomOrigin,
bool bOverrideZoomLimiting
)

 Change zoom level by the specified zoom level delta, about the specified origin.
Protected function Static FVector2D

ComputeEdgePanAmount ( const FGeometry& MyGeometry,
const FVector2D& MouseEvent
)

 Compute much panel needs to change to pan to location
Protected function void Initialize members
Public function Const bool

Contains ( UObject* Node
)

 Is the given node being observed by a widget in this panel?
Public function void Commit transactions for any node movements
Protected function Const void

FindNodesAffectedByMarquee ( FGraphPanelSelectionSet& OutAffectedNodes
)

 Figure out which nodes intersect the marquee rectangle
Protected function Const bool

GetBoundsForNode ( const UObject* InNode,
FVector2D& MinCorner,
FVector2D& MaxCorner,
float Padding
)

 Get the bounds of the given node
Protected function bool

GetBoundsForNodes ( bool bSelectionSetOnly,
FVector2D& MinCorner,
FVector2D& MaxCorner,
float Padding
)

 Get the bounds of the selected nodes
Public function bool

GetBoundsForSelectedNodes ( FSlateRect& Rect,
float Padding
)

 Get the bounding area for the currently selected nodes
Public function Const EGraphRenderingLOD::Type Returns the current LOD level of this panel, based on the zoom factor
Public function Const FVector2D  
Public function Static uint32 Get the grid snap size
Public function Const const FGuid &  
Public function Const FVector2D  
Public function Const float The zoom amount; e.g. a value of 0.25f results in quarter-sized nodes
Public function Const bool

GetZoomTargetRect ( FVector2D& TopLeft,
FVector2D& BottomRight
)

 When a panel is scrolling/zooming to a target, this can be called to get it's destination
Public function Const FText  
Public function Const FSlateColor  
Protected function Const FVector2D

GraphCoordToPanelCoord ( const FVector2D& GraphSpaceCoordinate
)

 Given a coordinate in graph space (e.g. a node's position), return the same coordinate in widget space while taking zoom and panning into account
Public function Const bool If it is focusing on a particular object
Public function Const bool Query whether this graph is about to start panning/zooming towards a destination
Public function Const bool Returns if the panel has been panned or zoomed since the last update
Protected function Const bool

IsNodeCulled ( const TSharedRef< SNode >& Node,
const FGeometry& AllottedGeometry
)

 Determines if a specified node is not visually relevant.
Protected function Virtual void

OnBeginNodeInteraction ( const TSharedRef< SNode >& InNodeToDrag,
const FVector2D& GrabOffset
)

 Lets the CanvasPanel know that the user is interacting with a node.
Protected function Virtual void

OnEndNodeInteraction ( const TSharedRef< SNode >& InNodeToDrag
)

 Lets the CanvasPanel know that the user has ended interacting with a node.
Protected function Virtual bool

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

  
Protected function Virtual TSharedPtr< SWidget >

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

 INTERFACE TO IMPLEMENT.
Protected function Const void

PaintBackgroundAsLines ( const FSlateBrush* BackgroundImage,
const FGeometry& AllottedGeometry,
const FSlateRect& MyCullingRect,
FSlateWindowElementList& OutDrawElements,
int32& DrawLayerId
)

 Paint the background as lines.
Protected function Const void

PaintComment ( const FString& CommentText,
const FGeometry& AllottedGeometry,
const FSlateRect& MyCullingRect,
FSlateWindowElementList& OutDrawElements,
int32 DrawLayerId,
const FLinearColor& CommentTinting,
float& HeightAboveNode,
const FWidgetStyle& InWidgetStyle
)

 Paint a comment bubble.
Protected function Const void

PaintMarquee ( const FGeometry& AllottedGeometry,
const FSlateRect& MyCullingRect,
FSlateWindowElementList& OutDrawElements,
int32 DrawLayerId
)

 Paint the marquee selection rectangle.
Protected function Const void

PaintSoftwareCursor ( const FGeometry& AllottedGeometry,
const FSlateRect& MyCullingRect,
FSlateWindowElementList& OutDrawElements,
int32 DrawLayerId
)

 Paint the software mouse if necessary.
Protected function Const void

PaintSurroundSunkenShadow ( const FSlateBrush* ShadowImage,
const FGeometry& AllottedGeometry,
const FSlateRect& MyCullingRect,
FSlateWindowElementList& OutDrawElements,
int32 DrawLayerId
)

 Paint the well shadow (around the perimeter)
Public function Const FVector2D

PanelCoordToGraphCoord ( const FVector2D& PanelSpaceCoordinate
)

 Given a coordinate in panel space (i.e. panel widget space), return the same coordinate in graph space while taking zoom and panning into account
Protected function Const FSlateRect

PanelRectToGraphRect ( const FSlateRect& PanelSpaceRect
)

 Given a rectangle in panel space, return a rectangle in graph space.
Protected function Virtual void

PopulateVisibleChildren ( const FGeometry& AllottedGeometry
)

 Populate visibile children array
Protected function void Should be called whenever the zoom level has changed.
Protected function Virtual void Remove all nodes from the panel
Public function void

RequestDeferredPan ( const FVector2D& TargetPosition
)

 Ask panel to scroll to location
Protected function void Fires up a per-tick function to zoom the graph to fit.
Public function void

RestoreViewSettings ( const FVector2D& InViewOffset,
float InZoomAmount,
const FGuid& InBookmarkGuid
)

 Restore the graph panel to the supplied view offset/zoom.
Protected function bool

ScrollToLocation ( const FGeometry& MyGeometry,
FVector2D DesiredCenterPosition,
const float InDeltaTime
)

 Scroll the view to the desired location
Protected function void

SelectAndCenterObject ( const UObject* ObjectToSelect,
bool bCenter
)

 On the next tick, centers and selects the widget associated with the object if it exists
Public function void Sets the zoom levels container.
Protected function void

UpdateViewOffset ( const FGeometry& MyGeometry,
const FVector2D& TargetPosition
)

 Update the new view offset location
Public function void

ZoomToFit ( bool bOnlySelection
)

 Zooms out to fit either all nodes or only the selected ones.
Protected function bool

ZoomToLocation ( const FVector2D& CurrentSizeWithoutZoom,
const FVector2D& DesiredSize,
bool bDoneScrolling
)

 Zoom to fit the desired size
Protected function void

ZoomToTarget ( const FVector2D& TopLeft,
const FVector2D& BottomRight
)

 Zooms to the specified target rect

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 * Returns all the panel children rather than only visible
Public function Virtual FChildren * All widgets must provide a way to access their children in a layout-agnostic way.
Public function Virtual Const float

GetRelativeLayoutScale ( int32 ChildIndex,
float LayoutScaleMultiplier
)

 What is the Child's scale relative to this widget.
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

OnFocusLost ( const FFocusEvent& InFocusEvent
)

 Called when this widget loses focus. This event does not bubble.
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 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 FReply

OnTouchEnded ( const FGeometry& MyGeometry,
const FPointerEvent& InTouchEvent
)

 Called when a touchpad touch is ended (finger lifted)
Public function Virtual FReply

OnTouchGesture ( const FGeometry& MyGeometry,
const FPointerEvent& GestureEvent
)

 TOUCH and GESTURES Called when the user performs a gesture on trackpad. This event is bubbled.
Public function Virtual void

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

 Ticks this widget with Geometry.

Classes

  Type Name Description
Public class SNode    

Ask questions and help your peers Developer Forums

Write your own tutorials or read those from others Learning Library

On this page