public DiagramMouseManager(Diagram diagram)
{
_diagram = diagram;
_currentResizeDirection = ResizeDirection.None;
_leftButtonAction = MouseAction.None;
_rightButtonAction = MouseAction.None;
_leftButtonDown = false;
_rightButtonDown = false;
_leftButtonDownMousePosition = null;
_currentMousePosition = null;
_leftButtonDownMousePosition = null;
_itemUnderCursor = null;
_baseXViewOffset = 0;
_baseYViewOffset = 0;
_offsetWorker = null;
Selector = null;
}
public DiagramLabel(Diagram diagram, DiagramItem owner)
: base(diagram)
{
Drawer = new BaseLabelDrawer();
_owner = owner;
BorderPen = new Pen(new SolidColorBrush(Colors.Transparent), 0);
AllowInPlaceEdit = true;
IsSelectable = false;
}
public void NodeAdded(DiagramItem item, NetworkObject obj)
{
var node = item as DiagramNode;
if (node == null)
return;
NetworkNode networkNode = obj as NetworkNode;
if (networkNode == null)
return;
node.Label.Text = networkNode.Name;
node.UserData = networkNode.Id.ToString();
Utils.UpdateNodeStyle(node);
node.Label.TextChanged += new LabelEventHandler(OnDiagramTextChanged);
networkNode.PropertyChanged += new PropertyChangedEventHandler(OnNetworkNodePropertyChanged);
}
public void LinkAdded(DiagramItem item, NetworkObject obj)
{
var edge = item as DiagramEdge;
if (edge == null)
return;
NetworkEdge networkEdge = obj as NetworkEdge;
if (networkEdge == null)
return;
Utils.UpdateEdgeStyleFromType(edge, networkEdge.Type);
edge.UserData = networkEdge.Id.ToString();
networkEdge.PropertyChanged += new PropertyChangedEventHandler(OnNetworkEdgePropertyChanged);
}
public void GoToItem(DiagramItem item)
{
if (item.Geometry == null)
return;
Point center = new Point((item.Geometry.Bounds.Left + item.Geometry.Bounds.Right) / 2, (item.Geometry.Bounds.Top + item.Geometry.Bounds.Bottom) / 2);
Rect viewport = Viewport;
center.X -= viewport.Width / 2;
center.Y -= viewport.Height / 2;
this.XViewOffset = -center.X;
this.YViewOffset = -center.Y;
}
private void SaveItemPart(XElement xIn, DiagramItem item)
{
WriteElement(xIn, "UserData", item.UserData);
}
private void LoadItemPart(XElement xIn, DiagramItem item)
{
string res;
if (ReadElement(xIn, "UserData", out res))
{
item.UserData = res;
}
}
public virtual void ProcessLeftButtonDown()
{
if (_rightButtonDown)
return;
Selector = null;
_diagram.CaptureMouse();
_leftButtonDown = true;
_leftButtonAction = MouseAction.None;
ResetIsUnderCursor(_currentMousePosition.HasValue ? _currentMousePosition.Value : new Point(0, 0));
_mouseDownOnItem = _itemUnderCursor;
if (_diagram.Edges.Count != 0)
{
bool res = _diagram.Edges[0].HitTest(_currentMousePosition.Value);
}
if (_diagram.Selection.Contains(_itemUnderCursor) || _currentResizeDirection != ResizeDirection.None)
{
_leftButtonAction = MouseAction.MoveItem;
}
else
{
if (_mouseDownOnItem as DiagramNode != null || (_mouseDownOnItem as DiagramLabel != null
&& (_mouseDownOnItem as DiagramLabel).Owner as DiagramNode != null))
{
_leftButtonAction = MouseAction.CreateEdge;
}
else
{
_leftButtonAction = MouseAction.MultiSelect;
}
}
_leftButtonDownMousePosition = _currentMousePosition;
}
private bool SelectItem(DiagramItem item)
{
bool isSelectionExists = _diagram.Selection.Count != 0;
if (item == null)
{
_diagram.Selection.Clear();
return isSelectionExists;
}
if (item.IsSelectable == false)
{
var label = item as DiagramLabel;
if (label.Owner != null)
item = label.Owner;
}
bool isLabel = item as DiagramLabel != null;
bool isNode = item as DiagramNode != null;
bool isEdge = item as DiagramEdge != null;
bool isLabelSelection = !isSelectionExists ? false : (_diagram.Selection[0] as DiagramLabel != null);
bool isNodeSelection = !isSelectionExists ? false : (_diagram.Selection[0] as DiagramNode != null);
bool isEdgeSelection = !isSelectionExists ? false : (_diagram.Selection[0] as DiagramEdge != null);
if (isLabel && !isLabelSelection)
_diagram.Selection.Clear();
if (isNode && !isNodeSelection)
_diagram.Selection.Clear();
if (isEdge && !isEdgeSelection)
_diagram.Selection.Clear();
if (!Keyboard.IsKeyDown(Key.LeftShift) && !Keyboard.IsKeyDown(Key.RightShift))
_diagram.Selection.Clear();
if (!_diagram.Selection.Contains(item))
_diagram.Selection.Add(item);
return true;
}
private void CreateEdge(Point mousePosition)
{
var node = _mouseDownOnItem as DiagramNode;
if (node == null)
{
var label = _mouseDownOnItem as DiagramLabel;
node = label.Owner as DiagramNode;
}
if (node != null && !node.Bounds.Contains(mousePosition))
{
using (new DiagramUpdateLock(_diagram))
{
var edge = new DiagramEdge(_diagram);
edge.AnchoringMode = EdgeAnchoringMode.NodeToPoint;
edge.SourceNode = node;
edge.DestinationPoint = mousePosition;
_currentResizeDirection = ResizeDirection.AllRoundDestination;
_diagram.Selection.Clear();
_diagram.Selection.Add(edge);
}
_leftButtonAction = MouseAction.MoveItem;
_mouseDownOnItem = null;
}
}
protected void ResetIsUnderCursor(Point mousePosition)
{
foreach (var node in _diagram.Nodes)
{
node.IsUnderCursor = false;
}
List<DiagramItem> items = new List<DiagramItem>(FindHittedItems(mousePosition));
_itemUnderCursor = null;
for (int i = 0; i < items.Count; i++)
{
var node = items[i] as DiagramNode;
if (node != null && (_currentResizeDirection == ResizeDirection.AllRoundSource || _currentResizeDirection == ResizeDirection.AllRoundDestination))
{
node.IsUnderCursor = true;
}
if (i == 0)
{
_itemUnderCursor = items[i];
}
}
}
