Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / NetFx40 / Tools / System.Activities.Core.Presentation / System / Activities / Core / Presentation / ConnectionPoint.cs / 1305376 / ConnectionPoint.cs
//------------------------------------------------------------ // Copyright (c) Microsoft Corporation. All rights reserved. //----------------------------------------------------------- namespace System.Activities.Core.Presentation { using System.Windows; using System.Collections.Generic; using System.Windows.Shapes; using System.Diagnostics.CodeAnalysis; using System.Runtime; class ConnectionPoint : UIElement { //private UIElement visual; public static readonly DependencyProperty LocationProperty = DependencyProperty.Register("Location", typeof(Point), typeof(ConnectionPoint)); private ListattachedConnectors; private Point location; private UIElement parentDesigner; private ConnectionPointType pointType; // Size constants for the rectangle drawn internal const double DrawingSmallSide = 4; internal const double DrawingLargeSide = 10; // Size constants for the hit test area. internal const double HitTestSmallSide = 14; internal const double HitTestLargeSide = 20; public ConnectionPoint() { location = new Point(0, 0); pointType = ConnectionPointType.Default; attachedConnectors = new List (); this.parentDesigner = null; } public List AttachedConnectors { get { return this.attachedConnectors; } } public Point Location { get { return (Point)GetValue(ConnectionPoint.LocationProperty); } set { SetValue(ConnectionPoint.LocationProperty, value); } } // This is the vector from the point on the Edge to the topLeft of the rectangle being drawn. public Vector DrawingOffset { get { return GetOffset(DrawingSmallSide, DrawingLargeSide); } } // This is the vector from the point on the Edge to the topLeft of the rectangle being used for hit test. public Vector HitTestOffset { get { return GetOffset(HitTestSmallSide, HitTestLargeSide); } } // This is the size for the rectangle drawn (size is independent of coordinate system) public Size DrawingSize { get { return this.GetSize(ConnectionPoint.DrawingSmallSide, ConnectionPoint.DrawingLargeSide); } } // This is the size for the hit test area (size is independent of coordinate system) public Size HitTestSize { get { return this.GetSize(ConnectionPoint.HitTestSmallSide, ConnectionPoint.HitTestLargeSide); } } public UIElement ParentDesigner { get { return this.parentDesigner; } set { this.parentDesigner = value; } } public ConnectionPointType PointType { get { return this.pointType; } set { this.pointType = value; } } //Gets the list of Points representing the edge for the current ConnectionPoint with respect to the (0,0) of the FreeFormPanel. public List Edge { get { FrameworkElement parent = this.ParentDesigner as FrameworkElement; Fx.Assert(parent != null, "shape should be a FrameworkElement"); Point topLeft = FreeFormPanel.GetLocation(parent); topLeft.Offset(parent.Margin.Left, parent.Margin.Top); double parentWidth = parent.DesiredSize.Width - parent.Margin.Left - parent.Margin.Right; double parentHeight = parent.DesiredSize.Height - parent.Margin.Top - parent.Margin.Bottom; if (this.Location.X == topLeft.X) {//Left Edge return new List { topLeft, new Point(topLeft.X, topLeft.Y + parentHeight) }; } else if (this.Location.X == topLeft.X + parentWidth) {//Right edge return new List { new Point(topLeft.X + parentWidth, topLeft.Y), new Point(topLeft.X + parentWidth, topLeft.Y + parentHeight) }; } else if (this.Location.Y == topLeft.Y) {//Top Edge return new List { topLeft, new Point(topLeft.X + parentWidth, topLeft.Y) }; } else if (this.Location.Y == topLeft.Y + parentHeight) {//Bottom edge return new List { new Point(topLeft.X, topLeft.Y + parentHeight), new Point(topLeft.X + parentWidth, topLeft.Y + parentHeight) }; } return null; } } public EdgeLocation EdgeLocation { get; set; } // This is the vector from the point on the Edge to the topLeft of a rectangle with a particular (small, large) pair. Vector GetOffset(double small, double large) { return this.EdgeToDrawnMidPointOffset() + this.MidPointToTopLeftOffset(small, large); } // This is the vector from the point on the Edge to the topLeft of the "drawn" rectangle. Vector EdgeToDrawnMidPointOffset() { double small = ConnectionPoint.DrawingSmallSide; switch (this.EdgeLocation) { case EdgeLocation.Left: return new Vector(-small / 2, 0); case EdgeLocation.Right: return new Vector(small / 2, 0); case EdgeLocation.Top: return new Vector(0, -small / 2); case EdgeLocation.Bottom: return new Vector(0, small / 2); } Fx.Assert("There is no other possibilities for EdgeDirections"); // To please compiler return new Vector(); } // This is the vector from the midpoint of the rectangle to the topLeft of the rectangle with a particular (small, large) pair. Vector MidPointToTopLeftOffset(double small, double large) { Size rectSize = GetSize(small, large); return new Vector(-rectSize.Width / 2, -rectSize.Height / 2); } // This is the size for the rectangle with a particular (small, large) pair Size GetSize(double small, double large) { if (this.EdgeLocation == EdgeLocation.Left || this.EdgeLocation == EdgeLocation.Right) { return new Size(small, large); } else { return new Size(large, small); } } } enum EdgeLocation { Left, Right, Top, Bottom } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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