mcs/class/referencesource/System.Activities.Presentation/System.Activities.Presentation/System/Activities/Presentation/Base/Core/Internal/PropertyEditing/FromExpression/Framework/PropertyInspector/NewItemFactoryTypeModel.cs

   1 // -------------------------------------------------------------------
   2 // Copyright (c) Microsoft Corporation.  All rights reserved.
   3 // -------------------------------------------------------------------
   4 //From \\authoring\Sparkle\Source\1.0.1083.0\Common\Source\Framework\Properties
   5 namespace System.Activities.Presentation.Internal.PropertyEditing.FromExpression.Framework.PropertyInspector
   6 {
   7     using System;
   8     using System.Windows;
   9     using System.Activities.Presentation.PropertyEditing;
  10     using System.ComponentModel;
  11     using System.Windows.Media;
  12     using System.Globalization;
  13
  14     internal class NewItemFactoryTypeModel
  15     {
  16         private Type type;
  17         private NewItemFactory factory;
  18         private Size desiredSize;
  19         private IMessageLogger exceptionLogger;
  20
  21         public NewItemFactoryTypeModel(Type type, NewItemFactory factory)
  22         {
  23             this.type = type;
  24             this.factory = factory;
  25             this.desiredSize = new Size(0, 0);
  26             this.exceptionLogger = null;
  27         }
  28
  29         public NewItemFactoryTypeModel(Type type, NewItemFactory factory, IMessageLogger exceptionLogger) : this(type, factory)
  30         {
  31             this.exceptionLogger = exceptionLogger;
  32         }
  33
  34         public string DisplayName
  35         {
  36             get { return this.factory.GetDisplayName(this.type); }
  37         }
  38
  39         public Type Type
  40         {
  41             get { return this.type; }
  42         }
  43
  44         public object Image
  45         {
  46             get
  47             {
  48                 object image = this.factory.GetImage(this.type, this.desiredSize);
  49                 ImageSource imageSource = image as ImageSource;
  50                 if (imageSource != null && imageSource is ISupportInitialize)
  51                 {
  52                     try
  53                     {
  54                         double dummyHeight = imageSource.Height;
  55                     }
  56                     catch (InvalidOperationException exception)
  57                     {
  58                         this.ReportException(string.Format(CultureInfo.CurrentCulture, ExceptionStringTable.NewItemFactoryIconLoadFailed, this.factory.GetType().Name, exception.Message));
  59                     }
  60                 }
  61                 return image;
  62             }
  63         }
  64
  65         public Size DesiredSize
  66         {
  67             get { return this.desiredSize; }
  68             set { this.desiredSize = value; }
  69         }
  70
  71         public NewItemFactory ItemFactory
  72         {
  73             get { return this.factory; }
  74         }
  75
  76         public object CreateInstance()
  77         {
  78             return this.factory.CreateInstance(this.type);
  79         }
  80
  81         private void ReportException(string message)
  82         {
  83             if (this.exceptionLogger != null)
  84             {
  85                 this.exceptionLogger.WriteLine(message);
  86             }
  87         }
  88
  89         // <summary>
  90         //  Seems like the ComboBoxAutomation peer, calls the object.ToString() to read out
  91         //  the item, if the item doesnt have its content set when queried by AutomationClient.
  92         //  As a result, when this NewItemFactoryTypeModel,
  93         //  is added to the combo-box in a SubPropertyEditor, we need to return the DisplayName
  94         //  property in the ToString() implementation so that that the AutomationClient
  95         //  reads out the correct value instead of the type of the object.
  96         // </summary>
  97         // <returns></returns>
  98         public override string ToString()
  99         {
 100             return DisplayName;
 101         }
 102     }
 103 }