protected void OnMouseMove(MouseMoveEvent e)
{
GraphElement ce = e.target as GraphElement;
if (ce != null && !ce.IsMovable())
{
return;
}
if (m_Active)
{
Vector2 diff = e.localMousePosition - m_Start;
if (ce != null)
{
var targetScale = ce.transform.scale;
diff.x *= targetScale.x;
diff.y *= targetScale.y;
}
Rect rect = CalculatePosition(target.layout.x + diff.x, target.layout.y + diff.y, target.layout.width, target.layout.height);
if (target.isLayoutManual)
{
target.layout = rect;
}
else if (target.resolvedStyle.position == Position.Absolute)
{
target.style.left = rect.x;
target.style.top = rect.y;
}
e.StopPropagation();
}
}
protected void OnMouseUp(MouseUpEvent e)
{
GraphElement ce = e.target as GraphElement;
if (ce != null && !ce.IsMovable())
{
return;
}
if (m_Active)
{
if (CanStopManipulation(e))
{
var graphElement = target as GraphElement;
if (graphElement != null)
{
graphElement.UpdatePresenterPosition();
}
m_Active = false;
target.ReleaseMouse();
e.StopPropagation();
}
}
}
protected void OnMouseDown(MouseDownEvent e)
{
if (m_Active)
{
e.StopImmediatePropagation();
return;
}
GraphElement ce = e.target as GraphElement;
if (ce != null && !ce.IsMovable())
{
return;
}
if (CanStartManipulation(e))
{
m_Start = e.localMousePosition;
m_Active = true;
target.CaptureMouse();
e.StopPropagation();
}
}
protected new void OnMouseDown(MouseDownEvent e)
{
if (m_Active)
{
e.StopImmediatePropagation();
return;
}
if (CanStartManipulation(e))
{
m_GraphView = target as GraphView;
if (m_GraphView == null)
{
return;
}
selectedElement = null;
// avoid starting a manipulation on a non movable object
clickedElement = e.target as GraphElement;
if (clickedElement == null)
{
var ve = e.target as VisualElement;
clickedElement = ve.GetFirstAncestorOfType <GraphElement>();
if (clickedElement == null)
{
return;
}
}
// Only start manipulating if the clicked element is movable, selected and that the mouse is in its clickable region (it must be deselected otherwise).
if (!clickedElement.IsMovable() || !clickedElement.HitTest(clickedElement.WorldToLocal(e.mousePosition)))
{
return;
}
// If we hit this, this likely because the element has just been unselected
// It is important for this manipulator to receive the event so the previous one did not stop it
// but we shouldn't let it propagate to other manipulators to avoid a re-selection
if (!m_GraphView.selection.Contains(clickedElement))
{
e.StopImmediatePropagation();
return;
}
selectedElement = clickedElement;
m_OriginalPos = new Dictionary <GraphElement, OriginalPos>();
foreach (ISelectable s in m_GraphView.selection)
{
GraphElement ce = s as GraphElement;
if (ce == null || !ce.IsMovable())
{
continue;
}
StackNode stackNode = null;
if (ce.parent is StackNode)
{
stackNode = ce.parent as StackNode;
if (stackNode.IsSelected(m_GraphView))
{
continue;
}
}
Rect geometry = ce.GetPosition();
Rect geometryInContentViewSpace = ce.hierarchy.parent.ChangeCoordinatesTo(m_GraphView.contentViewContainer, geometry);
m_OriginalPos[ce] = new OriginalPos
{
pos = geometryInContentViewSpace,
scope = ce.GetContainingScope(),
stack = stackNode,
stackIndex = stackNode != null?stackNode.IndexOf(ce) : -1
};
}
m_originalMouse = e.mousePosition;
m_ItemPanDiff = Vector3.zero;
if (m_PanSchedule == null)
{
m_PanSchedule = m_GraphView.schedule.Execute(Pan).Every(k_PanInterval).StartingIn(k_PanInterval);
m_PanSchedule.Pause();
}
m_Active = true;
target.CaptureMouse(); // We want to receive events even when mouse is not over ourself.
e.StopImmediatePropagation();
}
}
