public void OnMouseDoubleClick(double X, double Y, GraphicsLayer.MouseButton button)
{
var x = X / _viewScale;
var y = Y / _viewScale;
var o = GetHit(x, y);
var graphChanged = false;
if (_state == States.Idle && !Canvas.IsControlKeyDown)
{
if (button == MouseButton.Left)
{
if (o == null)
{
var v = new Vertex(x, y);
if (_graph.AddVertex(v))
{
graphChanged = true;
}
}
else if (o is Vertex)
{
var endVertex = (Vertex)o;
foreach (var v in _graph.SelectedVertices)
{
if (_graph.AddEdge(v, endVertex))
{
graphChanged = true;
}
}
}
}
else if (button == MouseButton.Right)
{
if (o is Vertex)
{
if (_graph.RemoveVertex((Vertex)o))
{
graphChanged = true;
}
}
}
}
Invalidate();
if (graphChanged)
{
GraphChanged();
}
}
public void OnMouseUp(double X, double Y, GraphicsLayer.MouseButton button)
{
var x = X / _viewScale;
var y = Y / _viewScale;
var o = GetHit(x, y);
switch (_state)
{
case States.Idle:
{
break;
}
case States.DraggingVertex:
{
if (button == MouseButton.Left)
{
_state = States.Idle;
if (SnapToGrid)
{
DoSnapToGrid();
}
GraphChanged();
}
break;
}
case States.DraggingSelectionRegion:
{
if (button == MouseButton.Left)
{
_state = States.Idle;
List <Box> selectionPoints;
lock (_SelectionPointsToken)
{
selectionPoints = new List <Box>(_selectionPoints);
if (selectionPoints.Count > 2)
{
_graph.SelectObjects(selectionPoints, _controlWasDown);
}
Canvas.SelectedObjects = _graph.SelectedItems.Cast <object>();
Invalidate();
}
}
break;
}
case States.DraggingSelectedVertices:
{
if (button == MouseButton.Left)
{
_state = States.Idle;
GraphChanged();
}
break;
}
}
Invalidate();
}
public void OnMouseDown(double X, double Y, GraphicsLayer.MouseButton button)
{
_controlWasDown = Canvas.IsControlKeyDown;
var x = X / _viewScale;
var y = Y / _viewScale;
var o = GetHit(x, y);
switch (_state)
{
case States.Idle:
{
if (button == MouseButton.Left)
{
if (o == null)
{
_selectionPoints.Clear();
_selectionPoints.Add(new Box(x, y));
_state = States.DraggingSelectionRegion;
}
else if (o is Vertex)
{
if (((Vertex)o).IsSelected)
{
foreach (Vertex v in _graph.SelectedVertices)
{
v.DragOffset = new Box(v.X - x, v.Y - y);
}
_state = States.DraggingSelectedVertices;
}
else
{
_DraggedVertex = (Vertex)o;
_DraggedVertex.DragOffset = new Box(_DraggedVertex.X - x, _DraggedVertex.Y - y);
_state = States.DraggingVertex;
}
}
else if (o is Edge)
{
}
}
else if (button == MouseButton.Right)
{
if (o == null)
{
}
else if (o is Vertex)
{
}
else if (o is Edge)
{
}
}
break;
}
case States.DraggingVertex:
break;
case States.DraggingSelectionRegion:
break;
}
}