public void Draw( EdgeLayout layoutState )
{
var styleState = myPresentation.GetPropertySetFor<EdgeStyle>().Get( Owner.Id );
var stream = new StreamGeometry();
var context = stream.Open();
context.BeginFigure( layoutState.Points.First(), false, false );
context.PolyBezierTo( layoutState.Points.Skip( 1 ).ToList(), true, false );
// draw arrow head
var start = layoutState.Points.Last();
var v = start - layoutState.Points.ElementAt( layoutState.Points.Count() - 2 );
v.Normalize();
start = start - v * 0.15;
context.BeginFigure( start + v * 0.28, true, true );
double t = v.X; v.X = v.Y; v.Y = -t; // Rotate 90°
context.LineTo( start + v * 0.08, true, true );
context.LineTo( start + v * -0.08, true, true );
context.Close();
var pen = new Pen( styleState.Color, 0.016 );
// http://stackoverflow.com/questions/1755520/improve-drawingvisual-renders-speed
Visual = new DrawingVisual();
var dc = Visual.RenderOpen();
dc.DrawGeometry( pen.Brush, pen, stream );
dc.Close();
Visual.SetValue( GraphItemProperty, Owner );
}
public void Draw( EdgeLayout layoutState )
{
var styleState = myPresentation.GetPropertySetFor<EdgeStyle>().Get( Owner.Id );
var label = myPresentation.GetPropertySetFor<Caption>().Get( Owner.Id );
var stream = new StreamGeometry();
var context = stream.Open();
context.BeginFigure( layoutState.Points.First(), false, false );
context.PolyBezierTo( layoutState.Points.Skip( 1 ).ToList(), true, false );
// draw arrow head
var start = layoutState.Points.Last();
var v = start - layoutState.Points.ElementAt( layoutState.Points.Count() - 2 );
v.Normalize();
start = start - v * 0.15;
context.BeginFigure( start + v * 0.28, true, true );
double t = v.X; v.X = v.Y; v.Y = -t; // Rotate 90°
context.LineTo( start + v * 0.08, true, true );
context.LineTo( start + v * -0.08, true, true );
context.Close();
var pen = new Pen( styleState.Color, 0.016 );
// http://stackoverflow.com/questions/1755520/improve-drawingvisual-renders-speed
Visual = new DrawingVisual();
var dc = Visual.RenderOpen();
dc.DrawGeometry( pen.Brush, pen, stream );
if( label.DisplayText != label.OwnerId )
{
var sourceLayoutState = myPresentation.GetModule<IGraphLayoutModule>().GetLayout( Owner.Source );
var tx = new FormattedText( label.DisplayText,
CultureInfo.InvariantCulture,
FlowDirection.LeftToRight,
myFont,
sourceLayoutState.Height * 0.5, Brushes.Black );
dc.DrawText( tx, new Point( layoutState.LabelPosition.X - tx.Width, layoutState.LabelPosition.Y - tx.Height ) );
}
dc.Close();
Visual.SetValue( GraphItemProperty, Owner );
}
public EdgeLayout ReadEdgeLayout( string edgeId )
{
int pointCount = myReader.ReadInt();
var points = new List<Point>();
for( int i = 0; i < pointCount; ++i )
{
points.Add( ReadPoint() );
}
var layout = new EdgeLayout( edgeId );
layout.Points = points;
return layout;
}
public void Add(EdgeLayout layout)
{
myEdgeLayouts.Add(layout.OwnerId, layout);
OnCollectionChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Add, layout));
}