protected void OnMouseDown(MouseDownEvent e)
{
if (e.currentTarget is ISelectable)
{
if (base.CanStartManipulation(e))
{
if ((base.target as ISelectable).HitTest(e.localMousePosition))
{
GraphElement graphElement = e.currentTarget as GraphElement;
if (graphElement != null)
{
VisualElement parent = graphElement.shadow.parent;
while (parent != null && !(parent is GraphView))
{
parent = parent.shadow.parent;
}
GraphView selectionContainer = parent as GraphView;
if (graphElement.IsSelected(selectionContainer) && e.ctrlKey)
{
graphElement.Unselect(selectionContainer);
}
else
{
graphElement.Select(selectionContainer, e.shiftKey || e.ctrlKey);
}
}
}
}
}
}
public virtual void OnStartDragging(GraphElement ge)
{
var node = ge as Node;
if (node != null)
{
ge.RemoveFromHierarchy();
graphView.AddElement(ge);
// Reselect it because RemoveFromHierarchy unselected it
ge.Select(graphView, true);
}
}
protected new 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 positionning the graph elements once the
// mouse has gone out.
m_MouseDiff = m_originalMouse - e.mousePosition;
foreach (KeyValuePair <GraphElement, Rect> v in m_OriginalPos)
{
GraphElement ce = v.Key;
// Detach the selected element from its parent before dragging it
// TODO: Make it more generic
if (ce.parent is StackNode)
{
StackNode stackNode = ce.parent as StackNode;
ce.RemoveFromHierarchy();
m_GraphView.AddElement(ce);
// Reselect it because RemoveFromHierarchy unselected it
ce.Select(m_GraphView, true);
if (m_GraphView.elementRemovedFromStackNode != null)
{
m_GraphView.elementRemovedFromStackNode(stackNode, ce);
}
}
MoveElement(ce, v.Value);
}
List <ISelectable> selection = m_GraphView.selection;
// 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?
IDropTarget dropTarget = GetDropTargetAt(e.mousePosition, selection.OfType <VisualElement>());
if (m_PrevDropTarget != dropTarget && m_PrevDropTarget != null)
{
using (DragExitedEvent eexit = DragExitedEvent.GetPooled(e))
{
SendDragAndDropEvent(eexit, selection, m_PrevDropTarget);
}
}
using (DragUpdatedEvent eupdated = DragUpdatedEvent.GetPooled(e))
{
SendDragAndDropEvent(eupdated, selection, dropTarget);
}
m_PrevDropTarget = dropTarget;
selectedElement = null;
e.StopPropagation();
}
