From 03959e785f635697fcdf0f99aad9454fafbf4e2e Mon Sep 17 00:00:00 2001
From: Roy Ben-Shabat <Roy@Twine-s.com>
Date: Thu, 14 Jun 2018 11:57:22 +0300
Subject: Improved UdpDiscoveryClient (I Think...). Improved PPC
 NavigationManager by providing a way to navigate by module/view paths..

---
 .../ExtensionMethods/DependencyObjectExtensions.cs |   2 +
 .../ExtensionMethods/FrameworkElementExtensions.cs | 133 +++++++++++++++++++++
 2 files changed, 135 insertions(+)

(limited to 'Software/Visual_Studio/Tango.Core/ExtensionMethods')

diff --git a/Software/Visual_Studio/Tango.Core/ExtensionMethods/DependencyObjectExtensions.cs b/Software/Visual_Studio/Tango.Core/ExtensionMethods/DependencyObjectExtensions.cs
index a12ca4f7f..12eba6bb3 100644
--- a/Software/Visual_Studio/Tango.Core/ExtensionMethods/DependencyObjectExtensions.cs
+++ b/Software/Visual_Studio/Tango.Core/ExtensionMethods/DependencyObjectExtensions.cs
@@ -2,9 +2,11 @@
 using System.Collections.Generic;
 using System.ComponentModel;
 using System.Linq;
+using System.Reflection;
 using System.Text;
 using System.Threading.Tasks;
 using System.Windows;
+using System.Windows.Controls;
 using System.Windows.Data;
 using System.Windows.Media;
 using System.Windows.Media.Animation;
diff --git a/Software/Visual_Studio/Tango.Core/ExtensionMethods/FrameworkElementExtensions.cs b/Software/Visual_Studio/Tango.Core/ExtensionMethods/FrameworkElementExtensions.cs
index 216f6ae0c..2193127cf 100644
--- a/Software/Visual_Studio/Tango.Core/ExtensionMethods/FrameworkElementExtensions.cs
+++ b/Software/Visual_Studio/Tango.Core/ExtensionMethods/FrameworkElementExtensions.cs
@@ -1,11 +1,14 @@
 using System;
+using System.Collections;
 using System.Collections.Generic;
 using System.Linq;
+using System.Reflection;
 using System.Text;
 using System.Threading.Tasks;
 using System.Windows;
 using System.Windows.Controls;
 using System.Windows.Controls.Primitives;
+using System.Windows.Markup;
 using Tango.Core.EventArguments;
 
 public static class FrameworkElementExtensions
@@ -309,5 +312,135 @@ public static class FrameworkElementExtensions
 
     #endregion
 
+    #region Loaded
 
+    /// <summary>
+    /// Registers for the element loaded event. if the element is already loaded will invoke the handler immediately.
+    /// </summary>
+    /// <param name="element">The element.</param>
+    /// <param name="handler">The handler.</param>
+    public static void RegisterForLoadedOrNow(this FrameworkElement element, EventHandler handler)
+    {
+        if (element.IsLoaded)
+        {
+            handler(element, new EventArgs());
+        }
+        else
+        {
+            bool isLoaded = false;
+
+            element.Loaded += (sender, e) =>
+            {
+                if (!isLoaded)
+                {
+                    isLoaded = true;
+
+                    handler(element, new EventArgs());
+                }
+            };
+        }
+    }
+
+    #endregion
+
+    /// <summary>
+    /// A recursive search for a child of type T in memory and not on logical/visual tree.
+    /// </summary>
+    /// <typeparam name="T"></typeparam>
+    /// <param name="element">The element.</param>
+    /// <returns></returns>
+    public static T FindChildOffline<T>(this FrameworkElement element) where T : DependencyObject
+    {
+        if (element == null) return null;
+
+        PropertyInfo contentProp = element.GetType().GetProperty("Child");
+
+        if (contentProp == null)
+        {
+            contentProp = element.GetType().GetProperty("Content");
+        }
+
+        if (contentProp != null)
+        {
+            var value = contentProp.GetValue(element);
+
+            if (value != null)
+            {
+                if (value.GetType() == typeof(T))
+                {
+                    return (T)value;
+                }
+                else
+                {
+                    return FindChildOffline<T>(value as FrameworkElement);
+                }
+            }
+        }
+
+        if (element is Panel)
+        {
+            foreach (var child in (element as Panel).Children.OfType<FrameworkElement>())
+            {
+                if (child.GetType() == typeof(T))
+                {
+                    return child as T;
+                }
+                else
+                {
+                    var result = FindChildOffline<T>(child);
+
+                    if (result != null)
+                    {
+                        return result;
+                    }
+                }
+            }
+        }
+
+        var contentAtt = element.GetType().GetCustomAttribute<ContentPropertyAttribute>();
+
+        if (contentAtt != null)
+        {
+            contentProp = element.GetType().GetProperty(contentAtt.Name);
+
+            if (contentProp != null)
+            {
+                var content = contentProp.GetValue(element);
+
+                if (content != null)
+                {
+                    if (content is IEnumerable)
+                    {
+                        foreach (var child in (content as IEnumerable))
+                        {
+                            if (child.GetType() == typeof(T))
+                            {
+                                return child as T;
+                            }
+                            else
+                            {
+                                var result = FindChildOffline<T>(child as FrameworkElement);
+
+                                if (result != null)
+                                {
+                                    return result;
+                                }
+                            }
+                        }
+                    }
+                    else
+                    {
+                        var result = FindChildOffline<T>(content as FrameworkElement);
+
+                        if (result != null)
+                        {
+                            return result;
+                        }
+                    }
+                }
+            }
+        }
+
+        return null;
+    }
 }
-- 
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