Resolved PPC CPU usage by events.

2 files changed, 59 insertions, 7 deletions

diff --git a/Software/Visual_Studio/Tango.SharedUI/Controls/NavigationControl.cs b/Software/Visual_Studio/Tango.SharedUI/Controls/NavigationControl.cs
index 5ef543347..1ec273e43 100644
--- a/Software/Visual_Studio/Tango.SharedUI/Controls/NavigationControl.cs
+++ b/Software/Visual_Studio/Tango.SharedUI/Controls/NavigationControl.cs
@@ -6,6 +6,7 @@ using System.Text;
 using System.Threading.Tasks;
 using System.Windows;
 using System.Windows.Controls;
+using System.Windows.Forms.Integration;
 using System.Windows.Markup;
 using System.Windows.Media;
 using System.Windows.Media.Animation;
@@ -294,12 +295,17 @@ namespace Tango.SharedUI.Controls
         {
             if (!_loaded)
             {
+                _loaded = true;
+
                 if (Elements != null)
                 {
+                    //foreach (var element in Elements.Where(x => x != SelectedElement))
+                    //{
+                    //    LoadVisual(element);
+                    //}
+
                     SelectedElement = Elements.FirstOrDefault();
                 }
-
-                _loaded = true;
             }
         }
 
@@ -335,13 +341,35 @@ namespace Tango.SharedUI.Controls
                 var toAdd = Elements.Where(x => !_grid.Children.OfType<NavigationElement>().Select(y => y.Element).ToList().Contains(x)).ToList();
 
                 toRemove.ForEach(x => _grid.Children.Remove(x));
-                toAdd.ForEach(x => _grid.Children.Add(
-                    new NavigationElement()
+
+                foreach (var x in toAdd)
+                {
+                    var navigationElement = new NavigationElement()
                     {
                         RenderTransformOrigin = new Point(0.5, 0.5),
                         Element = x,
-                        Content = KeepElementsAttached ? x : null,
-                    }));
+                        Content = x,
+                    };
+
+                    _grid.Children.Add(navigationElement);
+
+                    if (!KeepElementsAttached)
+                    {
+                        bool loaded = false;
+
+                        navigationElement.Loaded += (_, __) =>
+                        {
+                            if (!loaded)
+                            {
+                                if (x != SelectedElement)
+                                {
+                                    loaded = true;
+                                    navigationElement.Content = null;
+                                }
+                            }
+                        };
+                    }
+                }
             }
 
             if (!Elements.Contains(SelectedElement))
@@ -550,6 +578,29 @@ namespace Tango.SharedUI.Controls
             return element;
         }
 
+        /// <remarks>
+        /// This method needs to be called in order for 
+        //  the element to print visibly at the correct size.
+        /// </remarks>
+        private static void LoadVisual(FrameworkElement element)
+        {
+            if (element.Parent == null)
+            {
+                try
+                {
+                    System.Windows.Forms.UserControl controlContainer = new System.Windows.Forms.UserControl();
+                    controlContainer.Width = 100;
+                    controlContainer.Height = 100;
+                    var host = new ElementHost() { Child = element, Dock = System.Windows.Forms.DockStyle.Fill };
+                    controlContainer.Controls.Add(host);
+                    IntPtr handle = controlContainer.Handle;
+                    host.Child = null;
+                    controlContainer.Dispose();
+                }
+                catch { }
+            }
+        }
+
         #endregion
     }
 }
diff --git a/Software/Visual_Studio/Tango.SharedUI/Tango.SharedUI.csproj b/Software/Visual_Studio/Tango.SharedUI/Tango.SharedUI.csproj
index 53462afbf..4ee00a06e 100644
--- a/Software/Visual_Studio/Tango.SharedUI/Tango.SharedUI.csproj
+++ b/Software/Visual_Studio/Tango.SharedUI/Tango.SharedUI.csproj
@@ -58,6 +58,7 @@
     <Reference Include="WindowsBase" />
     <Reference Include="PresentationCore" />
     <Reference Include="PresentationFramework" />
+    <Reference Include="WindowsFormsIntegration" />
   </ItemGroup>
   <ItemGroup>
     <Compile Include="..\Versioning\GlobalVersionInfo.cs">
@@ -237,7 +238,7 @@
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <ProjectExtensions>
     <VisualStudio>
-      <UserProperties BuildVersion_AssemblyInfoFilename="Properties\AssemblyInfo.cs" BuildVersion_UpdateAssemblyVersion="True" BuildVersion_BuildVersioningStyle="None.None.Increment.TimeStamp" BuildVersion_UseGlobalSettings="False" BuildVersion_StartDate="2000/1/1" />
+      <UserProperties BuildVersion_StartDate="2000/1/1" BuildVersion_UseGlobalSettings="False" BuildVersion_BuildVersioningStyle="None.None.Increment.TimeStamp" BuildVersion_UpdateAssemblyVersion="True" BuildVersion_AssemblyInfoFilename="Properties\AssemblyInfo.cs" />
     </VisualStudio>
   </ProjectExtensions>
 </Project>
\ No newline at end of file