/// <inheritdoc />
protected override void BuildPartUI(VisualElement parent)
{
if (m_Model is IVariableDeclarationModel variableDeclarationModel)
{
m_Field = GraphElementFactory.CreateUI <GraphElement>(m_OwnerElement.View, m_OwnerElement.CommandDispatcher,
variableDeclarationModel, blackboardVariablePartCreationContext);
if (m_Field == null)
{
return;
}
m_Field.AddToClassList(ussClassName);
m_Field.AddToClassList(m_ParentClassName.WithUssElement(PartName));
m_Field.viewDataKey = m_Model.Guid + "__" + Blackboard.persistenceKey;
m_Field.AddToView(m_OwnerElement.View);
if (m_Field is BlackboardField blackboardField)
{
blackboardField.NameLabel.RegisterCallback <ChangeEvent <string> >(OnFieldRenamed);
}
if (parent is BlackboardRow row)
{
row.FieldSlot.Add(m_Field);
}
else
{
parent.Add(m_Field);
}
}
}
static bool WasSelectableDescendantHitByMouse(GraphElement currentTarget, MouseDownEvent evt)
{
VisualElement targetElement = evt.target as VisualElement;
if (targetElement == null || currentTarget == targetElement)
{
return(false);
}
VisualElement descendant = targetElement;
while (descendant != null && currentTarget != descendant)
{
GraphElement selectableDescendant = descendant as GraphElement;
if (selectableDescendant != null && selectableDescendant.enabledInHierarchy && selectableDescendant.pickingMode != PickingMode.Ignore && selectableDescendant.Model.IsSelectable())
{
Vector2 localMousePosition = currentTarget.ChangeCoordinatesTo(descendant, evt.localMousePosition);
if (selectableDescendant.ContainsPoint(localMousePosition))
{
return(true);
}
}
descendant = descendant.parent;
}
return(false);
}
internal void BeginSnap(GraphElement selectedElement)
{
UpdateSnappingStrategies();
foreach (var snapStrategy in m_SnappingStrategies.Where(snapStrategy => snapStrategy.Enabled))
{
snapStrategy.BeginSnap(selectedElement);
}
}
static void OffsetDependency(GraphElement element, IDependency model, Vector2 delta, INodeModel _)
{
Vector2 prevPos = model.DependentNode.Position;
Rect posRect = element.GetPosition();
posRect.position = prevPos + delta;
element.SetPosition(posRect);
}
void UpdateSpacingPositions(GraphElement selectedElement, Rect sourceRect)
{
ClearRectsToConsider();
GetRectsToConsiderInView(selectedElement);
SortReferenceRects();
ComputeSpacingPositions(m_VerticalReferenceRects, sourceRect);
ComputeSpacingPositions(m_HorizontalReferenceRects, sourceRect);
}
static void AdjustSnappedRect(ref Rect snappedRect, Rect sourceRect, GraphElement selectedElement, float scale, SnapStrategy snapStrategy, Vector2 mousePanningDelta = default)
{
// Retrieve the snapping strategy's suggested snapped rect and its snapping offset
Vector2 snappingOffset = new Vector2(float.MaxValue, float.MaxValue);
Rect suggestedSnappedRect = snapStrategy.GetSnappedRect(ref snappingOffset, sourceRect, selectedElement, scale, mousePanningDelta);
// Set snapped rect coordinates using the suggested rect's relevant coordinates
SetSnappedRect(ref snappedRect, suggestedSnappedRect, snappingOffset);
}
/// <summary>
/// Callback for the MouseDown event.
/// </summary>
/// <param name="e">The event.</param>
protected void OnMouseDown(MouseDownEvent e)
{
if (m_Active)
{
e.StopImmediatePropagation();
return;
}
m_Active = false;
m_Dragging = false;
m_AddedByMouseDown = false;
if (target == null)
{
return;
}
m_SelectionContainer = target.GetFirstAncestorOfType <IDragSource>();
if (m_SelectionContainer == null)
{
// Keep for potential later use in OnMouseUp (where e.target might be different then)
m_SelectionContainer = target.GetFirstOfType <IDragSource>();
m_SelectedElement = e.target as GraphElement;
return;
}
m_SelectedElement = target.GetFirstOfType <GraphElement>();
if (m_SelectedElement == null)
{
return;
}
// Since we didn't drag after all, update selection with current element only
if (!m_SelectedElement.IsSelected())
{
var selectionMode = e.actionKey ? SelectElementsCommand.SelectionMode.Add : SelectElementsCommand.SelectionMode.Replace;
m_SelectedElement.CommandDispatcher.Dispatch(new SelectElementsCommand(selectionMode, m_SelectedElement.Model));
m_AddedByMouseDown = true;
}
if (e.button == (int)m_ActivateButton)
{
// avoid starting a manipulation on a non movable object
if (!m_SelectedElement.Model.IsDroppable())
{
return;
}
m_MouseDownPosition = e.localMousePosition;
m_Active = true;
target.CaptureMouse();
e.StopPropagation();
}
}
internal Rect GetSnappedRect(Rect sourceRect, GraphElement selectedElement, float scale, Vector2 mousePanningDelta = default)
{
Rect snappedRect = sourceRect;
foreach (var snapStrategy in m_SnappingStrategies.Where(snapStrategy => snapStrategy.Enabled))
{
AdjustSnappedRect(ref snappedRect, sourceRect, selectedElement, scale, snapStrategy, mousePanningDelta);
}
return(snappedRect);
}
internal static BorderWidth GetBorderWidth(GraphElement element)
{
var borderWidth = new BorderWidth
{
Top = element.contentContainer.resolvedStyle.borderTopWidth,
Bottom = element.contentContainer.resolvedStyle.borderBottomWidth,
Left = element.contentContainer.resolvedStyle.borderLeftWidth,
Right = element.contentContainer.resolvedStyle.borderRightWidth
};
return(borderWidth);
}
bool IsIgnoredElement(GraphElement selectedElement, GraphElement element, Rect rectToFit)
{
if (selectedElement is Placemat placemat && element.layout.Overlaps(placemat.layout) || element is Edge || !element.visible ||
element.IsSelected() || element.layout.Overlaps(selectedElement.layout))
{
return(true);
}
Rect localSelRect = m_GraphView.ChangeCoordinatesTo(element, rectToFit);
return(!element.Overlaps(localSelRect));
}
void AddReferenceRects(GraphElement selectedElement, GraphElement element, Rect rectToAdd)
{
// Check if element is within selectedElement's vertical boundaries before adding
if (AreElementsSuperposed(selectedElement.layout, element.layout, PortOrientation.Horizontal))
{
m_VerticalReferenceRects.Rects.Add(rectToAdd);
}
// Check if element is within selectedElement's horizontal boundaries before adding
if (AreElementsSuperposed(selectedElement.layout, element.layout, PortOrientation.Vertical))
{
m_HorizontalReferenceRects.Rects.Add(rectToAdd);
}
}
void GetLeftOversBoundingRects(ref List <Tuple <Rect, List <IGraphElementModel> > > boundingRects)
{
foreach (IGraphElementModel element in m_LeftOverElementModels)
{
GraphElement elementUI = element.GetUI <GraphElement>(m_GraphView);
if (elementUI != null)
{
boundingRects.Add(new Tuple <Rect, List <IGraphElementModel> >(elementUI.GetPosition(), new List <IGraphElementModel> {
element
}));
}
}
}
public override void BeginSnap(GraphElement selectedElement)
{
if (IsActive)
{
Debug.LogError("SnapService.BeginSnap: Snap to grid already active. Call EndSnap() first.");
}
IsActive = true;
m_BorderWidth = GetBorderWidth(selectedElement); // Needed to snap element on its content container's border
m_GraphView = selectedElement.GraphView;
m_GridSpacing = m_GraphView.SafeQ <GridBackground>().Spacing;
}
void SnapOrMoveElement(GraphElement element, Rect originalPos, Rect selectedElementGeom)
{
if (m_Snapper.IsActive)
{
Vector2 geomDiff = selectedElementGeom.position - m_OriginalPos[m_SelectedElement].pos.position;
Vector2 position = new Vector2(originalPos.x + geomDiff.x, originalPos.y + geomDiff.y);
element.SetPosition(new Rect(position, element.layout.size));
}
else
{
MoveElement(element, originalPos);
}
}
void GetRectsToConsiderInView(GraphElement selectedElement)
{
// Consider only the visible nodes.
Rect rectToFit = m_GraphView.layout;
foreach (GraphElement element in m_GraphView.GraphElements.ToList())
{
if (!IsIgnoredElement(selectedElement, element, rectToFit))
{
Rect geometryInContentViewContainerSpace = (element).parent.ChangeCoordinatesTo(m_GraphView.ContentViewContainer, (element).GetPosition());
AddReferenceRects(selectedElement, element, geometryInContentViewContainerSpace);
}
}
}
List <Rect> GetNotSelectedElementRectsInView(GraphElement selectedElement)
{
var notSelectedElementRects = new List <Rect>();
var ignoredModels = m_GraphView.GetSelection().ToList();
// Consider only the visible nodes.
Rect rectToFit = m_GraphView.layout;
foreach (GraphElement element in m_GraphView.GraphElements.ToList())
{
if (selectedElement is Placemat placemat && element.layout.Overlaps(placemat.layout))
{
// If the selected element is a placemat, we do not consider the elements under it
ignoredModels.Add(element.Model);
}
public override void BeginSnap(GraphElement selectedElement)
{
if (IsActive)
{
throw new InvalidOperationException("SnapStrategy.BeginSnap: Snap to spacing already active. Call EndSnap() first.");
}
IsActive = true;
m_GraphView = selectedElement.GraphView;
if (m_LineView == null)
{
m_LineView = new LineView(m_GraphView);
}
m_GraphView.Add(m_LineView);
}
void MoveElement(GraphElement element, Rect originalPos)
{
Matrix4x4 g = element.worldTransform;
var scale = new Vector3(g.m00, g.m11, g.m22);
Rect newPos = new Rect(0, 0, originalPos.width, originalPos.height);
// Compute the new position of the selected element using the mouse delta position and panning info
newPos.x = originalPos.x - (m_MouseDiff.x - m_ItemPanDiff.x) * m_PanSpeed.x / scale.x * element.transform.scale.x;
newPos.y = originalPos.y - (m_MouseDiff.y - m_ItemPanDiff.y) * m_PanSpeed.y / scale.y * element.transform.scale.y;
newPos = m_GraphView.ContentViewContainer.ChangeCoordinatesTo(element.hierarchy.parent, newPos);
element.SetPosition(newPos);
}
public override void BeginSnap(GraphElement selectedElement)
{
if (IsActive)
{
throw new InvalidOperationException("SnapStrategy.BeginSnap: Snap to port already active. Call EndSnap() first.");
}
IsActive = true;
if (selectedElement is Node selectedNode)
{
m_GraphView = selectedElement.GraphView;
m_ConnectedEdges = GetConnectedEdges(selectedNode);
m_ConnectedPortsPos = GetConnectedPortPositions(m_ConnectedEdges);
}
}
void ComputeSnappedRect(ref Rect selectedElementProposedGeom, GraphElement element)
{
// Check if snapping is paused first: if yes, the snapper will return the original dragging position
if (Event.current != null)
{
m_Snapper.PauseSnap(Event.current.shift);
}
// Let the snapper compute a snapped position
Rect geometryInContentViewContainerSpace = element.parent.ChangeCoordinatesTo(m_GraphView.ContentViewContainer, selectedElementProposedGeom);
Vector2 mousePanningDelta = new Vector2((m_MouseDiff.x - m_ItemPanDiff.x) * m_PanSpeed.x / m_Scale, (m_MouseDiff.y - m_ItemPanDiff.y) * m_PanSpeed.y / m_Scale);
geometryInContentViewContainerSpace = m_Snapper.GetSnappedRect(geometryInContentViewContainerSpace, element, m_Scale, mousePanningDelta);
// Once the snapped position is computed in the GraphView.contentViewContainer's space then
// translate it into the local space of the parent of the selected element.
selectedElementProposedGeom = m_GraphView.ContentViewContainer.ChangeCoordinatesTo(element.parent, geometryInContentViewContainerSpace);
}
protected void OnMouseUp(MouseUpEvent e)
{
GraphElement ce = e.target as GraphElement;
if (ce != null && !ce.IsMovable())
{
return;
}
if (m_Active)
{
if (CanStopManipulation(e))
{
m_Active = false;
target.ReleaseMouse();
e.StopPropagation();
}
}
}
/// <summary>
/// Callback for the MouseCaptureOut event.
/// </summary>
/// <param name="e">The event.</param>
protected void OnMouseCaptureOutEvent(MouseCaptureOutEvent e)
{
if (m_Active)
{
if (m_CurrentDropTarget != null && m_GraphView != null)
{
using (DragExitedEvent eExit = DragExitedEvent.GetPooled())
{
eExit.target = m_CurrentDropTarget;
m_GraphView.SendEvent(eExit);
}
}
// Stop processing the event sequence if the target has lost focus, then.
m_SelectedElement = null;
m_CurrentDropTarget = null;
m_Active = false;
if (m_GraphView?.GetSelection().Any() ?? false)
{
m_Snapper.EndSnap();
}
}
}
public abstract void BeginSnap(GraphElement selectedElement);
/// <summary>
/// Callback for the MouseUp event.
/// </summary>
/// <param name="evt">The event.</param>
protected void OnMouseUp(MouseUpEvent evt)
{
if (m_GraphView == null)
{
if (m_Active)
{
target.ReleaseMouse();
m_SelectedElement = null;
m_Active = false;
m_Dragging = false;
m_CurrentDropTarget = null;
}
return;
}
var selectedModels = m_GraphView.GetSelection();
if (CanStopManipulation(evt))
{
if (m_Active)
{
if (m_Dragging || m_SelectedElement == null)
{
if (target is GraphView graphView)
{
graphView.StopSelectionDragger();
graphView.PositionDependenciesManager.StopNotifyMove();
}
// if we stop dragging on something else than a DropTarget, just move elements
if (m_GraphView != null && (m_CurrentDropTarget == null || !m_CurrentDropTarget.CanAcceptDrop(selectedModels)))
{
var movedElements = new HashSet <GraphElement>(m_OriginalPos.Keys);
movedElements.AddRangeInternal(m_EdgesToUpdate);
KeyValuePair <GraphElement, OriginalPos> firstPos = m_OriginalPos.First();
var delta = firstPos.Key.GetPosition().position - firstPos.Value.pos.position;
var models = movedElements
// PF remove this Where clause. It comes from VseGraphView.OnGraphViewChanged.
.Where(e => !(e.Model is INodeModel) || e.IsMovable())
.Select(e => e.Model)
.OfType <IMovable>();
m_GraphView.CommandDispatcher.Dispatch(
new MoveElementsCommand(delta, models.ToList()));
}
}
foreach (var edge in m_EdgesToUpdate)
{
edge.EdgeControl.ControlPointOffset = Vector2.zero;
}
m_EdgesToUpdate.Clear();
m_PanSchedule.Pause();
if (m_ItemPanDiff != Vector3.zero)
{
Vector3 p = m_GraphView.ContentViewContainer.transform.position;
Vector3 s = m_GraphView.ContentViewContainer.transform.scale;
m_GraphView.CommandDispatcher.Dispatch(new ReframeGraphViewCommand(p, s));
}
if (selectedModels.Count > 0 && m_CurrentDropTarget != null)
{
if (m_CurrentDropTarget.CanAcceptDrop(selectedModels))
{
using (DragPerformEvent ePerform = DragPerformEvent.GetPooled(evt))
{
ePerform.target = m_CurrentDropTarget;
m_GraphView.SendEvent(ePerform);
}
}
else
{
using (DragExitedEvent eExit = DragExitedEvent.GetPooled(evt))
{
eExit.target = m_CurrentDropTarget;
m_GraphView.SendEvent(eExit);
}
}
}
if (selectedModels.Any())
{
m_Snapper.EndSnap();
}
target.ReleaseMouse();
evt.StopPropagation();
}
m_SelectedElement = null;
m_Active = false;
m_CurrentDropTarget = null;
m_Dragging = false;
m_CurrentDropTarget = null;
}
}
static bool IsOnPlacemats(GraphElement element, List <Placemat> placemats)
{
return(placemats.Any(placemat => !element.Equals(placemat) && element.layout.Overlaps(placemat.layout)));
}
public override Rect GetSnappedRect(ref Vector2 snappingOffset, Rect sourceRect, GraphElement selectedElement, float scale, Vector2 mousePanningDelta = default)
{
if (!IsActive)
{
throw new InvalidOperationException("SnapStrategy.GetSnappedRect: Snap to spacing not active. Call BeginSnap() first.");
}
if (IsPaused)
{
// Snapping was paused, we do not return a snapped rect and we clear the snap lines
ClearSnapLines();
return(sourceRect);
}
Rect selectedElementRect = (selectedElement).parent.ChangeCoordinatesTo(m_GraphView.ContentViewContainer, (selectedElement).GetPosition());
UpdateSpacingPositions(selectedElement, selectedElementRect);
Rect snappedRect = sourceRect;
m_CurrentScale = scale;
m_LineView.lines.Clear();
List <SnapToSpacingResult> results = GetClosestSpacingPositions(sourceRect);
foreach (var result in results.Where(result => result != null))
{
ApplySnapToSpacingResult(ref snappingOffset, sourceRect, ref snappedRect, result);
// Make sure the element is snapped before drawing the lines
if (IsSnapped(snappedRect, sourceRect, result.ReferenceRects.Orientation))
{
foreach (SpacingLine spacingLine in GetSpacingLines(result.ReferenceRects.Rects, result.ReferenceRects.Orientation))
{
m_LineView.lines.AddRange(spacingLine.Lines);
}
}
}
m_LineView.MarkDirtyRepaint();
return(snappedRect);
}
/// <summary>
/// Callback for the MouseMove event.
/// </summary>
/// <param name="e">The event.</param>
protected void OnMouseMove(MouseMoveEvent e)
{
if (!m_Active)
{
return;
}
if (m_GraphView == null)
{
return;
}
var ve = (VisualElement)e.target;
Vector2 gvMousePos = ve.ChangeCoordinatesTo(m_GraphView.contentContainer, e.localMousePosition);
m_PanDiff = GetEffectivePanSpeed(gvMousePos);
if (m_PanDiff != Vector3.zero)
{
m_PanSchedule.Resume();
}
else
{
m_PanSchedule.Pause();
}
// We need to monitor the mouse diff "by hand" because we stop positioning the graph elements once the
// mouse has gone out.
m_MouseDiff = m_OriginalMouse - e.mousePosition;
if (m_SelectedElement.parent != null)
{
// Handle the selected element
Rect selectedElementGeom = GetSelectedElementGeom();
ComputeSnappedRect(ref selectedElementGeom, m_SelectedElement);
foreach (KeyValuePair <GraphElement, OriginalPos> v in m_OriginalPos)
{
GraphElement ce = v.Key;
// Protect against stale visual elements that have been deparented since the start of the manipulation
if (ce.hierarchy.parent == null)
{
continue;
}
if (!v.Value.dragStarted)
{
v.Value.dragStarted = true;
}
SnapOrMoveElement(v.Key, v.Value.pos, selectedElementGeom);
}
foreach (var edge in m_EdgesToUpdate)
{
SnapOrMoveEdge(edge, selectedElementGeom);
}
}
var selection = m_GraphView.GetSelection();
var selectedUI = selection.Select(m => m.GetUI(m_GraphView));
// TODO: Replace with a temp drawing or something...maybe manipulator could fake position
// all this to let operation know which element sits under cursor...or is there another way to draw stuff that is being dragged?
var previousDropTarget = m_CurrentDropTarget;
m_CurrentDropTarget = GetDropTargetAt(e.mousePosition, selectedUI.OfType <VisualElement>().ToList());
if (m_CurrentDropTarget != previousDropTarget)
{
if (previousDropTarget != null)
{
using (DragLeaveEvent eLeave = DragLeaveEvent.GetPooled(e))
{
eLeave.target = previousDropTarget;
m_GraphView.SendEvent(eLeave);
}
}
if (m_CurrentDropTarget != null)
{
using (DragEnterEvent eEnter = DragEnterEvent.GetPooled(e))
{
eEnter.target = m_CurrentDropTarget;
m_GraphView.SendEvent(eEnter);
}
}
}
if (m_CurrentDropTarget != null)
{
using (DragUpdatedEvent eUpdated = DragUpdatedEvent.GetPooled(e))
{
eUpdated.target = m_CurrentDropTarget;
m_GraphView.SendEvent(eUpdated);
}
}
m_Dragging = true;
e.StopPropagation();
}
public override Rect GetSnappedRect(ref Vector2 snappingOffset, Rect sourceRect, GraphElement selectedElement, float scale, Vector2 mousePanningDelta = default)
{
if (!IsActive)
{
throw new InvalidOperationException("SnapStrategy.GetSnappedRect: Snap to borders not active. Call BeginSnap() first.");
}
if (IsPaused)
{
// Snapping was paused, we do not return a snapped rect and we clear the snap lines
ClearSnapLines();
return(sourceRect);
}
Rect snappedRect = sourceRect;
m_CurrentScale = scale;
List <SnapToBordersResult> results = GetClosestSnapElements(sourceRect);
m_LineView.lines.Clear();
foreach (SnapToBordersResult result in results)
{
ApplySnapToBordersResult(ref snappingOffset, sourceRect, ref snappedRect, result);
result.IndicatorLine = GetSnapLine(snappedRect, result.SourceReference, result.SnappableRect, result.SnappableReference);
m_LineView.lines.Add(result.IndicatorLine);
}
m_LineView.MarkDirtyRepaint();
m_SnappableRects = GetNotSelectedElementRectsInView(selectedElement);
return(snappedRect);
}
public abstract Rect GetSnappedRect(ref Vector2 snappingOffset, Rect sourceRect, GraphElement selectedElement, float scale, Vector2 mousePanningDelta = default);
public override Rect GetSnappedRect(ref Vector2 snappingOffset, Rect sourceRect, GraphElement selectedElement, float scale, Vector2 mousePanningDelta = default)
{
if (!IsActive)
{
throw new InvalidOperationException("SnapStrategy.GetSnappedRect: Snap to port not active. Call BeginSnap() first.");
}
if (IsPaused)
{
// Snapping was paused, we do not return a snapped rect
return(sourceRect);
}
Rect snappedRect = sourceRect;
if (selectedElement is Node selectedNode)
{
m_CurrentScale = scale;
SnapToPortResult chosenResult = GetClosestSnapToPortResult(selectedNode, mousePanningDelta);
if (chosenResult != null)
{
var adjustedSourceRect = GetAdjustedSourceRect(chosenResult, sourceRect, mousePanningDelta);
snappedRect = adjustedSourceRect;
ApplySnapToPortResult(ref snappingOffset, adjustedSourceRect, ref snappedRect, chosenResult);
}
}
return(snappedRect);
}