/**
* This is called from OperatorWidget while dragging from OperatorWidget during onDragConnectionDelta
*/
public void UpdateDuringConstruction(Point endPoint)
{
if (Source.Outputs.Count <= 0)
{
return;
}
var sourceUI = Source as UIElement;
if (UIHelper.FindParent <CompositionGraphView>(sourceUI) == null)
{
Logger.Warn("Tried to connect to source that is not in current view (" + Output.Parent.Name + ").");
return;
}
Point sourcePointInMainPanel = Source.PositionOnCanvas;
double targetY = endPoint.Y;
double sourceY = sourcePointInMainPanel.Y;
double targetXmin, targetXmax;
targetXmin = endPoint.X;
targetXmax = endPoint.X;
IsSelected = false;
int outputCount = Source.Outputs.Count;
int outputIndex = Output.Func.EvaluationIndex;
double outputWidth = Source.Width / outputCount;
double sourceXmin = sourcePointInMainPanel.X + (double)outputIndex * outputWidth;
double sourceXmax = sourceXmin + outputWidth;
// Calculate straight factor from overlap
double BLEND_RANGE = 40;
double BLEND_BORDER = 10;
double overlapp = Math.Min(sourceXmax, targetXmax) - Math.Max(sourceXmin, targetXmin);
double straightFactor = Math.Min(BLEND_RANGE, Math.Max(0, overlapp - BLEND_BORDER)) / BLEND_RANGE;
// limit straight connection to a certain y range...
double STRAIGHT_MIN_DISTANCE = 50;
double STRAIGHT_DISTANCE_BLEND = 50;
double dy = sourceY - targetY;
if (dy < -2)
{
straightFactor = 0.0;
}
else
{
straightFactor *= 1 - (Utilities.Clamp(dy, STRAIGHT_MIN_DISTANCE, STRAIGHT_MIN_DISTANCE + STRAIGHT_DISTANCE_BLEND) - STRAIGHT_MIN_DISTANCE) / STRAIGHT_DISTANCE_BLEND;
}
// Calculate curviness
const double MIN_TANGENT_LENGTH = 80.0;
const double MAX_TANGENT_LENGTH = 200.0;
double tangent = Utilities.Clamp(((sourceY - targetY) * 0.4), MIN_TANGENT_LENGTH, MAX_TANGENT_LENGTH) * (1 - straightFactor);
// Blend X depending on straightfactor
double sourceXcenter = sourceXmin + 0.5 * (sourceXmax - sourceXmin);
double targetXcenter = targetXmin + 0.5 * (targetXmax - targetXmin);
double averageX = Math.Max(sourceXmin, targetXmin) + 0.5 * overlapp;
double sourceX = sourceXcenter * (1 - straightFactor) + straightFactor * averageX;
double targetX = targetXcenter * (1 - straightFactor) + straightFactor * averageX;
m_TargetPoint = new Point(targetX, targetY);
m_SourcePoint = new Point(sourceX, sourceY);
m_PathFigure.StartPoint = new Point(sourceX, sourceY);
m_CurveSegment.Point1 = new Point(sourceX, sourceY - tangent);
m_CurveSegment.Point2 = new Point(targetX, targetY + tangent);
m_CurveSegment.Point3 = new Point(targetX, targetY);
m_ArrowHeadPathFigure.StartPoint = new Point(targetX, targetY + 2.02);
m_ArrowHeadLineSegment.Point = new Point(targetX, targetY + 2);
}
private void CreateLineGeometry()
{
//GradientPath = new GradientPath();
//GradientStop s2= new GradientStop(Colors.BrightColorFromType(Source.Type), offset:0.95);
//GradientStop s1= new GradientStop(Colors.ColorFromType(Source.Type), offset: 0.8);
//GradientPath.GradientStops.Add(s1);
//GradientPath.GradientStops.Add(s2);
//GradientPath.GradientMode = GradientMode.Parallel;
//GradientPath.StrokeThickness = 0.5;
//GradientPath.Tolerance= 0.2;
//GradientPath.IsHitTestVisible= false;
ConnectionPath = new Path();
//ConnectionPath.IsHitTestVisible = false;
ConnectionPath.Stroke = new SolidColorBrush(UIHelper.BrightColorFromType(Output.Type));
ConnectionPath.Stroke.Freeze();
ConnectionPath.StrokeThickness = 3;
ConnectionPath.StrokeEndLineCap = PenLineCap.Triangle;
this.Children.Add(ConnectionPath);
ConnectionPath2 = new Path();
//ConnectionPath2.IsHitTestVisible = false;
ConnectionPath2.Stroke = new SolidColorBrush(UIHelper.ColorFromType(Output.Type));
ConnectionPath2.Stroke.Freeze();
ConnectionPath2.StrokeThickness = 2.0;
ConnectionPath2.StrokeEndLineCap = PenLineCap.Triangle;
this.Children.Add(ConnectionPath2);
//this.Children.Add(GradientPath);
PathGeometry pathGeometry = new PathGeometry();
pathGeometry.FillRule = FillRule.Nonzero;
// Spline curve
m_PathFigure = new PathFigure();
m_PathFigure.StartPoint = new Point(10, 10);
pathGeometry.Figures.Add(m_PathFigure);
m_CurveSegment = new BezierSegment();
m_CurveSegment.Point1 = new Point(10, 10);
m_CurveSegment.Point2 = new Point(10, 10);
m_CurveSegment.Point3 = new Point(10, 10);
m_PathFigure.Segments.Add(m_CurveSegment);
ConnectionPath.Data = pathGeometry;
ConnectionPath2.Data = pathGeometry;
//GradientPath.Data = pathGeometry;
// ArrowHead
m_ArrowHeadPath = new Path();
m_ArrowHeadPath.IsHitTestVisible = false;
m_ArrowHeadPath.Stroke = new SolidColorBrush(UIHelper.BrightColorFromType(Output.Type));
m_ArrowHeadPath.Stroke.Freeze();
m_ArrowHeadPath.StrokeThickness = 14;
m_ArrowHeadPath.StrokeEndLineCap = PenLineCap.Triangle;
this.Children.Add(m_ArrowHeadPath);
PathGeometry ArrowHeadPathGeometry = new PathGeometry();
ArrowHeadPathGeometry.FillRule = FillRule.Nonzero;
m_ArrowHeadPathFigure = new PathFigure();
m_ArrowHeadPathFigure.StartPoint = new Point(10, 10);
ArrowHeadPathGeometry.Figures.Add(m_ArrowHeadPathFigure);
m_ArrowHeadLineSegment = new LineSegment();
m_ArrowHeadLineSegment.Point = new Point(10, -10);
m_ArrowHeadPathFigure.Segments.Add(m_ArrowHeadLineSegment);
m_ArrowHeadPath.Data = ArrowHeadPathGeometry;
// Head thumb
_thumb = new Thumb();
_thumb.Opacity = 0;
this.Children.Add(_thumb);
Canvas.SetTop(_thumb, -0.5 * CONNECTION_ARROW_THUMB_SIZE);
_thumb.Width = CONNECTION_ARROW_THUMB_SIZE;
Canvas.SetLeft(_thumb, -0.5 * CONNECTION_ARROW_THUMB_SIZE);
_thumb.Height = CONNECTION_ARROW_THUMB_SIZE;
_thumb.Loaded += Thumb_LoadedHandler;
this.Unloaded += Thumb_UnloadEventHandler;
}
/*
* Calculates connection curve as described in http://streber.pixtur.de/index.php?go=fileDownloadAsImage&file=4964
*/
public void Update()
{
if (Target == null)
{
return;
}
if (Source.Outputs.Count <= 0)
{
return;
}
if (Target.Inputs.Count <= 0)
{
return;
}
var targetUI = Target as UIElement;
if (UIHelper.FindParent <CompositionGraphView>(targetUI) == null)
{
Logger.Warn("Tried to connect to TargetWidget that is not in current view (" + Input.Parent.Name + "). Please report this bug.");
return;
}
var sourceUI = Source as UIElement;
if (UIHelper.FindParent <CompositionGraphView>(sourceUI) == null)
{
Logger.Warn("Tried to connect to source that is not in current view (" + Output.Parent.Name + "). Please report this bug.");
return;
}
Point targetPositionOnCanvas = Target.PositionOnCanvas;
Point sourcePointInMainPanel = Source.PositionOnCanvas;
double targetY = targetPositionOnCanvas.Y + Target.Height + 1.0;
double sourceY = sourcePointInMainPanel.Y + 1.0;
int index = this.GetMultiInputIndex();
Rect range = Target.GetRangeForInputConnectionLine(Input, index, false);
double targetXmin = targetPositionOnCanvas.X + range.Left;
double targetXmax = targetPositionOnCanvas.X + range.Right;
double targetXcenter = targetXmin + 0.5 * (targetXmax - targetXmin);
int outputCount = Source.Outputs.Count;
int outputIndex = Output.Func.EvaluationIndex;
double outputWidth = Source.Width / outputCount;
double sourceXmin = sourcePointInMainPanel.X + (double)outputIndex * outputWidth;
double sourceXmax = sourceXmin + outputWidth;
double sourceXcenter = sourceXmin + 0.5 * (sourceXmax - sourceXmin);
// Calculate straight factor from overlap
const double BLEND_RANGE = 20;
const double BLEND_BORDER = 10;
double overlapp = Math.Min(sourceXmax, targetXmax) - Math.Max(sourceXmin, targetXmin);
double straightFactor = Math.Min(BLEND_RANGE, Math.Max(0, overlapp - BLEND_BORDER)) / BLEND_RANGE;
// limit straight connection to a certain y range...
const double STRAIGHT_MIN_DISTANCE = 80;
const double STRAIGHT_DISTANCE_BLEND = 50;
double dy = sourceY - targetY;
if (dy < -2)
{
straightFactor = 0.0;
}
else
{
straightFactor *= 1 - (Utilities.Clamp(dy, STRAIGHT_MIN_DISTANCE, STRAIGHT_MIN_DISTANCE + STRAIGHT_DISTANCE_BLEND) - STRAIGHT_MIN_DISTANCE) / STRAIGHT_DISTANCE_BLEND;
}
// Calculate curviness
double MIN_TANGENT_LENGTH = 80.0;
double MAX_TANGENT_LENGTH = 200.0;
double tangent = Utilities.Clamp((sourceY - targetY) * 0.4, MIN_TANGENT_LENGTH, MAX_TANGENT_LENGTH) * (1 - straightFactor);
// Blend X depending on straight factor
double averageX = Math.Max(sourceXmin, targetXmin) + 0.5 * overlapp;
double sourceX = sourceXcenter * (1 - straightFactor) + straightFactor * averageX;
double targetX = targetXcenter * (1 - straightFactor) + straightFactor * averageX;
m_PathFigure.StartPoint = new Point(sourceX, sourceY);
m_CurveSegment.Point1 = new Point(sourceX, sourceY - tangent);
m_CurveSegment.Point2 = new Point(targetX, targetY + tangent);
m_CurveSegment.Point3 = new Point(targetX, targetY);
m_ArrowHeadPathFigure.StartPoint = new Point(targetX, targetY + 2.02);
m_ArrowHeadLineSegment.Point = new Point(targetX, targetY + 2);
m_TargetPoint = new Point(targetX, targetY);
m_SourcePoint = new Point(sourceX, sourceY);
Canvas.SetLeft(_thumb, targetX - 0.5 * CONNECTION_ARROW_THUMB_SIZE);
Canvas.SetTop(_thumb, targetY - 0.5 * CONNECTION_ARROW_THUMB_SIZE);
}