mcs/class/referencesource/System.Activities.Presentation/System.Activities.Presentation/System/Activities/Presentation/FreeFormEditing/ConnectorWithStartDot.xaml.cs

   1 //----------------------------------------------------------------
   2 // <copyright company="Microsoft Corporation">
   3 //     Copyright (c) Microsoft Corporation.  All rights reserved.
   4 // </copyright>
   5 //----------------------------------------------------------------
   6
   7 namespace System.Activities.Presentation.FreeFormEditing
   8 {
   9     using System.Windows;
  10     using System.Windows.Controls;
  11     using System.Windows.Input;
  12     using System.Windows.Media;
  13
  14     internal partial class ConnectorWithStartDot : Connector
  15     {
  16         public ConnectorWithStartDot()
  17         {
  18             this.InitializeComponent();
  19         }
  20
  21         public override FrameworkElement StartDot
  22         {
  23             get
  24             {
  25                 return this.startDotGrid;
  26             }
  27         }
  28
  29         public override void SetLabelToolTip(object toolTip)
  30         {
  31             this.labelTextBlock.ToolTip = toolTip;
  32         }
  33
  34         protected override void OnDragEnter(DragEventArgs e)
  35         {
  36             if (!this.IsMouseOnStartDot(e))
  37             {
  38                 base.OnDragEnter(e);
  39             }
  40         }
  41
  42         protected override void OnMouseEnter(MouseEventArgs e)
  43         {
  44             System.Windows.Controls.Panel.SetZIndex(this, 999);
  45             base.OnMouseEnter(e);
  46         }
  47
  48         protected override void OnMouseLeave(MouseEventArgs e)
  49         {
  50             System.Windows.Controls.Panel.SetZIndex(this, 1);
  51             base.OnMouseLeave(e);
  52         }
  53
  54         private bool IsMouseOnStartDot(DragEventArgs e)
  55         {
  56             HitTestResult result = VisualTreeHelper.HitTest(this, e.GetPosition(this));
  57             if (result != null && this.startDotGrid.IsAncestorOf(result.VisualHit))
  58             {
  59                 return true;
  60             }
  61
  62             return false;
  63         }
  64     }
  65 }