mcs/class/referencesource/System.Activities.Core.Presentation/System/Activities/Core/Presentation/StateMachineDesigner.xaml.cs

   1 //----------------------------------------------------------------
   2 // Copyright (c) Microsoft Corporation.  All rights reserved.
   3 //----------------------------------------------------------------
   4
   5 namespace System.Activities.Core.Presentation
   6 {
   7     using System.Activities.Presentation;
   8     using System.Activities.Presentation.Metadata;
   9     using System.Activities.Presentation.Model;
  10     using System.Activities.Presentation.View;
  11     using System.Activities.Presentation.View.OutlineView;
  12     using System.Activities.Statements;
  13     using System.ComponentModel;
  14     using System.Windows;
  15     using System.Windows.Input;
  16
  17     [ActivityDesignerOptions(AlwaysCollapseChildren = true)]
  18     partial class StateMachineDesigner
  19     {
  20         const string ExpandViewStateKey = "IsExpanded";
  21         internal const string InitialStatePropertyName = "InitialState";
  22         internal const string VariablesPropertyName = "Variables";
  23         internal const string StatesPropertyName = "States";
  24
  25         StateContainerEditor stateContainerEditor = null;
  26
  27         public StateMachineDesigner()
  28         {
  29             InitializeComponent();
  30         }
  31
  32         internal bool IsResizing { get; set; }
  33
  34         internal StateContainerEditor StateContainerEditor
  35         {
  36             get { return this.stateContainerEditor; }
  37         }
  38
  39         void OnStateContainerLoaded(object sender, RoutedEventArgs e)
  40         {
  41             this.stateContainerEditor = sender as StateContainerEditor;
  42         }
  43
  44         void OnStateContainerUnloaded(object sender, RoutedEventArgs e)
  45         {
  46             this.stateContainerEditor = null;
  47         }
  48
  49         public static void RegisterMetadata(AttributeTableBuilder builder)
  50         {
  51             Type stateMachineType = typeof(StateMachine);
  52             builder.AddCustomAttributes(stateMachineType, new DesignerAttribute(typeof(StateMachineDesigner)));
  53             builder.AddCustomAttributes(stateMachineType, stateMachineType.GetProperty(StateMachineDesigner.StatesPropertyName), BrowsableAttribute.No);
  54             builder.AddCustomAttributes(stateMachineType, stateMachineType.GetProperty(StateMachineDesigner.VariablesPropertyName), BrowsableAttribute.No);
  55             builder.AddCustomAttributes(stateMachineType, stateMachineType.GetProperty(StateMachineDesigner.InitialStatePropertyName), BrowsableAttribute.No);
  56             builder.AddCustomAttributes(stateMachineType, stateMachineType.GetProperty(StateMachineDesigner.InitialStatePropertyName), new ShowPropertyInOutlineViewAttribute() { DuplicatedChildNodesVisible = true });
  57             builder.AddCustomAttributes(stateMachineType, stateMachineType.GetProperty(StateMachineDesigner.StatesPropertyName), new ShowPropertyInOutlineViewAttribute());
  58
  59
  60             builder.AddCustomAttributes(stateMachineType, new FeatureAttribute(typeof(StateMachineValidationErrorSourceLocatorFeature)));
  61         }
  62
  63         protected override void OnModelItemChanged(object newItem)
  64         {
  65             ViewStateService viewStateService = this.Context.Services.GetService<ViewStateService>();
  66             if (viewStateService != null)
  67             {
  68                 // Make StateMachine designer always collapsed by default, but only if the user didn't explicitly specify collapsed or expanded.
  69                 bool? isExpanded = (bool?)viewStateService.RetrieveViewState((ModelItem)newItem, ExpandViewStateKey);
  70                 if (isExpanded == null)
  71                 {
  72                     viewStateService.StoreViewState((ModelItem)newItem, ExpandViewStateKey, false);
  73                 }
  74             }
  75             base.OnModelItemChanged(newItem);
  76         }
  77
  78         // do not proprogate up to StateMachineDesigner, because designer will set selection to itself on GotFocus event.
  79         private void OnAdornerLayerGotFocus(object sender, RoutedEventArgs e)
  80         {
  81             e.Handled = true;
  82         }
  83
  84         private void StateMachineDesignerKeyDown(object sender, KeyEventArgs e)
  85         {
  86             // Ignore KeyBoard input when in resizing mode.
  87             e.Handled = IsResizing;
  88         }
  89
  90         private void StateMachineDesignerPreviewKeyDown(object sender, KeyEventArgs e)
  91         {
  92             // Enter cannot be captured in KeyDown, so handle it in PreviewKeyDown event.
  93             e.Handled = IsResizing && e.Key == Key.Enter;
  94         }
  95     }
  96  }