FReply SPaperEditorViewport::OnMouseMove(const FGeometry& MyGeometry, const FPointerEvent& MouseEvent)
{
const bool bIsRightMouseButtonDown = MouseEvent.IsMouseButtonDown(EKeys::RightMouseButton);
const bool bIsLeftMouseButtonDown = MouseEvent.IsMouseButtonDown(EKeys::LeftMouseButton);
if (HasMouseCapture())
{
// Track how much the mouse moved since the mouse down.
const FVector2D CursorDelta = MouseEvent.GetCursorDelta();
TotalMouseDelta += CursorDelta.Size();
if (bIsRightMouseButtonDown)
{
FReply ReplyState = FReply::Handled();
if (!CursorDelta.IsZero())
{
bShowSoftwareCursor = true;
}
bIsPanning = true;
ViewOffset -= CursorDelta / GetZoomAmount();
return ReplyState;
}
else if (bIsLeftMouseButtonDown)
{
// TSharedPtr<SNode> NodeBeingDragged = NodeUnderMousePtr.Pin();
// Update the amount to pan panel
UpdateViewOffset(MyGeometry, MouseEvent.GetScreenSpacePosition());
const bool bCursorInDeadZone = TotalMouseDelta <= FSlateApplication::Get().GetDragTriggerDistance();
{
// We are marquee selecting
const FVector2D GraphMousePos = PanelCoordToGraphCoord( MyGeometry.AbsoluteToLocal( MouseEvent.GetScreenSpacePosition() ) );
Marquee.Rect.UpdateEndPoint(GraphMousePos);
return FReply::Handled();
}
}
}
return FReply::Unhandled();
}
void SPaperEditorViewport::Tick( const FGeometry& AllottedGeometry, const double InCurrentTime, const float InDeltaTime )
{
// Handle any deferred panning
if (bRequestDeferredPan)
{
bRequestDeferredPan = false;
UpdateViewOffset(AllottedGeometry, DeferredPanPosition);
}
if (!HasMouseCapture())
{
bShowSoftwareCursor = false;
bIsPanning = false;
}
PaperViewportClient->SetZoomPos( ViewOffset, GetZoomAmount() );
PaperViewportClient->bNeedsRedraw = true;
bool bSelectionModified = false;
if (Marquee.IsValid())
{
bSelectionModified = true;
OnSelectionChanged.ExecuteIfBound(Marquee, true);
}
if (bSelectionModified || bIsPanning || FSlateThrottleManager::Get().IsAllowingExpensiveTasks())
{
// Setup the selection set for the viewport
PaperViewportClient->SelectionRectangles.Empty();
if (Marquee.IsValid())
{
FViewportSelectionRectangle& Rect = *(new (PaperViewportClient->SelectionRectangles) FViewportSelectionRectangle);
Rect.Color = FColorList::Yellow;
Rect.Color.A = 0.45f;
Rect.TopLeft = Marquee.Rect.GetUpperLeft();
Rect.Dimensions = Marquee.Rect.GetSize();
}
// Tick and render the viewport
PaperViewportClient->Tick(InDeltaTime);
GEditor->UpdateSingleViewportClient(PaperViewportClient.Get(), /*bInAllowNonRealtimeViewportToDraw=*/ true, /*bLinkedOrthoMovement=*/ false);
}
}
/** SWidget interface */
virtual FReply OnMouseMove(const FGeometry& MyGeometry, const FPointerEvent& MouseEvent) override
{
const bool bIsRightMouseButtonDown = MouseEvent.IsMouseButtonDown( EKeys::RightMouseButton );
const bool bIsLeftMouseButtonDown = MouseEvent.IsMouseButtonDown( EKeys::LeftMouseButton );
PastePosition = PanelCoordToGraphCoord( MyGeometry.AbsoluteToLocal( MouseEvent.GetScreenSpacePosition() ) );
if ( this->HasMouseCapture() )
{
const FVector2D CursorDelta = MouseEvent.GetCursorDelta();
// Track how much the mouse moved since the mouse down.
TotalMouseDelta += CursorDelta.Size();
if (bIsRightMouseButtonDown)
{
FReply ReplyState = FReply::Handled();
if( !CursorDelta.IsZero() )
{
bShowSoftwareCursor = true;
}
// Panning and mouse is outside of panel? Pasting should just go to the screen center.
PastePosition = PanelCoordToGraphCoord( 0.5 * MyGeometry.Size );
this->bIsPanning = true;
ViewOffset -= CursorDelta / GetZoomAmount();
return ReplyState;
}
else if (bIsLeftMouseButtonDown)
{
TSharedPtr<SNode> NodeBeingDragged = NodeUnderMousePtr.Pin();
if ( IsEditable.Get() )
{
// Update the amount to pan panel
UpdateViewOffset(MyGeometry, MouseEvent.GetScreenSpacePosition());
const bool bCursorInDeadZone = TotalMouseDelta <= FSlateApplication::Get().GetDragTriggerDistance();
if ( NodeBeingDragged.IsValid() )
{
if ( !bCursorInDeadZone )
{
// Note, NodeGrabOffset() comes from the node itself, so it's already scaled correctly.
FVector2D AnchorNodeNewPos = PanelCoordToGraphCoord( MyGeometry.AbsoluteToLocal( MouseEvent.GetScreenSpacePosition() ) ) - NodeGrabOffset;
// Dragging an unselected node automatically selects it.
SelectionManager.StartDraggingNode(NodeBeingDragged->GetObjectBeingDisplayed(), MouseEvent);
// Move all the selected nodes.
{
const FVector2D AnchorNodeOldPos = NodeBeingDragged->GetPosition();
const FVector2D DeltaPos = AnchorNodeNewPos - AnchorNodeOldPos;
if (DeltaPos.Size() > KINDA_SMALL_NUMBER)
{
MoveSelectedNodes(NodeBeingDragged, AnchorNodeNewPos);
}
}
}
return FReply::Handled();
}
}
if ( !NodeBeingDragged.IsValid() )
{
// We are marquee selecting
const FVector2D GraphMousePos = PanelCoordToGraphCoord( MyGeometry.AbsoluteToLocal( MouseEvent.GetScreenSpacePosition() ) );
Marquee.Rect.UpdateEndPoint(GraphMousePos);
FindNodesAffectedByMarquee( /*out*/ Marquee.AffectedNodes );
return FReply::Handled();
}
}
}
return FReply::Unhandled();
}
