internal ConnectorModel GetInfo()
{
var owner = new DesignerItemModel();
owner.Left = DesignerCanvas.GetLeft( ParentDesignerItem );
owner.Top = DesignerCanvas.GetTop( ParentDesignerItem );
owner.Size = new Size( ParentDesignerItem.ActualWidth, ParentDesignerItem.ActualHeight );
ConnectorModel info = new ConnectorModel( owner );
info.Orientation = Orientation;
info.Position = Position;
return info;
}
private static Point GetOffsetPoint( ConnectorModel connector, Rect rect )
{
Point offsetPoint = new Point();
switch ( connector.Orientation )
{
case ConnectorOrientation.Left:
offsetPoint = new Point( rect.Left, connector.Position.Y );
break;
case ConnectorOrientation.Top:
offsetPoint = new Point( connector.Position.X, rect.Top );
break;
case ConnectorOrientation.Right:
offsetPoint = new Point( rect.Right, connector.Position.Y );
break;
case ConnectorOrientation.Bottom:
offsetPoint = new Point( connector.Position.X, rect.Bottom );
break;
default:
break;
}
return offsetPoint;
}
private static void CheckPathEnd( ConnectorModel source, ConnectorModel sink, bool showLastLine, List<Point> linePoints )
{
if ( showLastLine )
{
Point startPoint = new Point( 0, 0 );
switch ( source.Orientation )
{
case ConnectorOrientation.Left:
startPoint = new Point( source.Position.X - PathMargin, source.Position.Y );
break;
case ConnectorOrientation.Top:
startPoint = new Point( source.Position.X, source.Position.Y - PathMargin );
break;
case ConnectorOrientation.Right:
startPoint = new Point( source.Position.X + PathMargin, source.Position.Y );
break;
case ConnectorOrientation.Bottom:
startPoint = new Point( source.Position.X, source.Position.Y + PathMargin );
break;
default:
break;
}
Point endPoint = new Point( 0, 0 );
switch ( sink.Orientation )
{
case ConnectorOrientation.Left:
endPoint = new Point( sink.Position.X - PathMargin, sink.Position.Y );
break;
case ConnectorOrientation.Top:
endPoint = new Point( sink.Position.X, sink.Position.Y - PathMargin );
break;
case ConnectorOrientation.Right:
endPoint = new Point( sink.Position.X + PathMargin, sink.Position.Y );
break;
case ConnectorOrientation.Bottom:
endPoint = new Point( sink.Position.X, sink.Position.Y + PathMargin );
break;
default:
break;
}
linePoints.Insert( 0, startPoint );
linePoints.Add( endPoint );
}
else
{
linePoints.Insert( 0, source.Position );
linePoints.Add( sink.Position );
}
}
private static Rect GetRectWithMargin( ConnectorModel connectorThumb, double margin )
{
var rect = connectorThumb.OwnerItem.GetBoundingRectangle();
rect.Inflate( margin, margin );
return rect;
}
private static Point GetNearestVisibleNeighborSink( Point currentPoint, Point endPoint, ConnectorModel sink, Rect rectSource, Rect rectSink )
{
Point s1, s2; // neighbors on sink side
GetNeighborCorners( sink.Orientation, rectSink, out s1, out s2 );
bool flag1 = IsPointVisible( currentPoint, s1, new Rect[] { rectSource, rectSink } );
bool flag2 = IsPointVisible( currentPoint, s2, new Rect[] { rectSource, rectSink } );
if ( flag1 ) // s1 visible
{
if ( flag2 ) // s1 and s2 visible
{
if ( rectSink.Contains( s1 ) )
{
return s2;
}
if ( rectSink.Contains( s2 ) )
{
return s1;
}
if ( (Distance( s1, endPoint ) <= Distance( s2, endPoint )) )
{
return s1;
}
else
{
return s2;
}
}
else
{
return s1;
}
}
else // s1 not visible
{
if ( flag2 ) // only s2 visible
{
return s2;
}
else // s1 and s2 not visible
{
return new Point( double.NaN, double.NaN );
}
}
}
private static Point GetNearestNeighborSource( ConnectorModel source, Point endPoint, Rect rectSource, out bool flag )
{
Point n1, n2; // neighbors
GetNeighborCorners( source.Orientation, rectSource, out n1, out n2 );
if ( (Distance( n1, endPoint ) <= Distance( n2, endPoint )) )
{
flag = true;
return n1;
}
else
{
flag = false;
return n2;
}
}
internal static List<Point> GetConnectionLine( ConnectorModel source, Point sinkPoint, ConnectorOrientation preferredOrientation )
{
List<Point> linePoints = new List<Point>();
Rect rectSource = GetRectWithMargin( source, ConnectorMargin / 2 );
Point startPoint = GetOffsetPoint( source, rectSource );
Point endPoint = sinkPoint;
linePoints.Add( startPoint );
Point currentPoint = startPoint;
if ( !rectSource.Contains( endPoint ) )
{
while ( true )
{
if ( IsPointVisible( currentPoint, endPoint, new Rect[] { rectSource } ) )
{
linePoints.Add( endPoint );
break;
}
bool sideFlag;
Point n = GetNearestNeighborSource( source, endPoint, rectSource, out sideFlag );
linePoints.Add( n );
currentPoint = n;
if ( IsPointVisible( currentPoint, endPoint, new Rect[] { rectSource } ) )
{
linePoints.Add( endPoint );
break;
}
else
{
Point n1, n2;
GetOppositeCorners( source.Orientation, rectSource, out n1, out n2 );
if ( sideFlag )
linePoints.Add( n1 );
else
linePoints.Add( n2 );
linePoints.Add( endPoint );
break;
}
}
}
else
{
linePoints.Add( endPoint );
}
if ( preferredOrientation != ConnectorOrientation.None )
linePoints = OptimizeLinePoints( linePoints, new Rect[] { rectSource }, source.Orientation, preferredOrientation );
else
linePoints = OptimizeLinePoints( linePoints, new Rect[] { rectSource }, source.Orientation, GetOpositeOrientation( source.Orientation ) );
return linePoints;
}
internal static List<Point> GetConnectionLine( ConnectorModel source, ConnectorModel sink, bool showLastLine )
{
List<Point> linePoints = new List<Point>();
Rect rectSource = GetRectWithMargin( source, ConnectorMargin );
Rect rectSink = GetRectWithMargin( sink, ConnectorMargin );
Point startPoint = GetOffsetPoint( source, rectSource );
Point endPoint = GetOffsetPoint( sink, rectSink );
linePoints.Add( startPoint );
Point currentPoint = startPoint;
if ( !rectSink.Contains( currentPoint ) && !rectSource.Contains( endPoint ) )
{
while ( true )
{
if ( IsPointVisible( currentPoint, endPoint, new Rect[] { rectSource, rectSink } ) )
{
linePoints.Add( endPoint );
currentPoint = endPoint;
break;
}
Point neighbour = GetNearestVisibleNeighborSink( currentPoint, endPoint, sink, rectSource, rectSink );
if ( !double.IsNaN( neighbour.X ) )
{
linePoints.Add( neighbour );
linePoints.Add( endPoint );
currentPoint = endPoint;
break;
}
if ( currentPoint == startPoint )
{
bool flag;
Point n = GetNearestNeighborSource( source, endPoint, rectSource, rectSink, out flag );
linePoints.Add( n );
currentPoint = n;
if ( !IsRectVisible( currentPoint, rectSink, new Rect[] { rectSource } ) )
{
Point n1, n2;
GetOppositeCorners( source.Orientation, rectSource, out n1, out n2 );
if ( flag )
{
linePoints.Add( n1 );
currentPoint = n1;
}
else
{
linePoints.Add( n2 );
currentPoint = n2;
}
if ( !IsRectVisible( currentPoint, rectSink, new Rect[] { rectSource } ) )
{
if ( flag )
{
linePoints.Add( n2 );
currentPoint = n2;
}
else
{
linePoints.Add( n1 );
currentPoint = n1;
}
}
}
}
else // from here on we jump to the sink node
{
Point n1, n2; // neighbour corner
Point s1, s2; // opposite corner
GetNeighborCorners( sink.Orientation, rectSink, out s1, out s2 );
GetOppositeCorners( sink.Orientation, rectSink, out n1, out n2 );
bool n1Visible = IsPointVisible( currentPoint, n1, new Rect[] { rectSource, rectSink } );
bool n2Visible = IsPointVisible( currentPoint, n2, new Rect[] { rectSource, rectSink } );
if ( n1Visible && n2Visible )
{
if ( rectSource.Contains( n1 ) )
{
linePoints.Add( n2 );
if ( rectSource.Contains( s2 ) )
{
linePoints.Add( n1 );
linePoints.Add( s1 );
}
else
linePoints.Add( s2 );
linePoints.Add( endPoint );
currentPoint = endPoint;
break;
}
if ( rectSource.Contains( n2 ) )
{
linePoints.Add( n1 );
if ( rectSource.Contains( s1 ) )
{
linePoints.Add( n2 );
linePoints.Add( s2 );
}
else
linePoints.Add( s1 );
linePoints.Add( endPoint );
currentPoint = endPoint;
break;
}
if ( (Distance( n1, endPoint ) <= Distance( n2, endPoint )) )
{
linePoints.Add( n1 );
if ( rectSource.Contains( s1 ) )
{
linePoints.Add( n2 );
linePoints.Add( s2 );
}
else
linePoints.Add( s1 );
linePoints.Add( endPoint );
currentPoint = endPoint;
break;
}
else
{
linePoints.Add( n2 );
if ( rectSource.Contains( s2 ) )
{
linePoints.Add( n1 );
linePoints.Add( s1 );
}
else
linePoints.Add( s2 );
linePoints.Add( endPoint );
currentPoint = endPoint;
break;
}
}
else if ( n1Visible )
{
linePoints.Add( n1 );
if ( rectSource.Contains( s1 ) )
{
linePoints.Add( n2 );
linePoints.Add( s2 );
}
else
linePoints.Add( s1 );
linePoints.Add( endPoint );
currentPoint = endPoint;
break;
}
else
{
linePoints.Add( n2 );
if ( rectSource.Contains( s2 ) )
{
linePoints.Add( n1 );
linePoints.Add( s1 );
}
else
linePoints.Add( s2 );
linePoints.Add( endPoint );
currentPoint = endPoint;
break;
}
}
}
}
else
{
linePoints.Add( endPoint );
}
linePoints = OptimizeLinePoints( linePoints, new Rect[] { rectSource, rectSink }, source.Orientation, sink.Orientation );
CheckPathEnd( source, sink, showLastLine, linePoints );
return linePoints;
}