mcs/class/referencesource/System.Activities.Presentation/System.Activities.Presentation/System/Activities/Presentation/VerticalConnector.xaml.cs

   1 //-----------------------------------------------------------------------
   2 // <copyright file="VerticalConnector.xaml.cs" company="Microsoft Corporation">
   3 //      Copyright (c) Microsoft Corporation.  All rights reserved.
   4 // </copyright>
   5 //-----------------------------------------------------------------------
   6
   7 namespace System.Activities.Presentation
   8 {
   9     using System.Activities.Presentation;
  10     using System.Activities.Presentation.Hosting;
  11     using System.Activities.Presentation.Model;
  12     using System.Activities.Statements;
  13     using System.Windows;
  14     using System.Windows.Media.Animation;
  15
  16     internal partial class VerticalConnector
  17     {
  18         public VerticalConnector()
  19         {
  20             this.InitializeComponent();
  21         }
  22
  23         protected override void OnDragEnter(DragEventArgs e)
  24         {
  25             this.CheckAnimate(e, "Expand");
  26             this.dropTarget.Visibility = Visibility.Visible;
  27         }
  28
  29         protected override void OnDragLeave(DragEventArgs e)
  30         {
  31             this.CheckAnimate(e, "Collapse");
  32             this.dropTarget.Visibility = Visibility.Collapsed;
  33         }
  34
  35         protected override void OnDrop(DragEventArgs e)
  36         {
  37             this.dropTarget.Visibility = Visibility.Collapsed;
  38             base.OnDrop(e);
  39         }
  40
  41         private void CheckAnimate(DragEventArgs e, string storyboardResourceName)
  42         {
  43             if (!e.Handled)
  44             {
  45                 BeginStoryboard((Storyboard)this.Resources[storyboardResourceName]);
  46                 return;
  47             }
  48         }
  49     }
  50 }