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.shadow.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();
            }
        }
Пример #2
0
        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() || !m_GraphView.selection.Contains(clickedElement) || !clickedElement.HitTest(clickedElement.WorldToLocal(e.mousePosition)))
                {
                    return;
                }

                selectedElement = clickedElement;

                m_OriginalPos = new Dictionary <GraphElement, Rect>();

                foreach (ISelectable s in m_GraphView.selection)
                {
                    GraphElement ce = s as GraphElement;
                    if (ce == null || !ce.IsMovable())
                    {
                        continue;
                    }

                    if (ce.parent is StackNode)
                    {
                        StackNode stackNode = ce.parent as StackNode;

                        if (stackNode.IsSelected(m_GraphView))
                        {
                            continue;
                        }
                    }

                    Rect geometry = ce.GetPosition();
                    Rect geometryInContentViewSpace = ce.shadow.parent.ChangeCoordinatesTo(m_GraphView.contentViewContainer, geometry);
                    m_OriginalPos[ce] = geometryInContentViewSpace;
                }

                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.TakeMouseCapture(); // We want to receive events even when mouse is not over ourself.
                e.StopImmediatePropagation();
            }
        }