allow transitions to be disabled on dialog host and drawer

Author: ButchersBoy

MaterialDesignThemes.Wpf/DialogHost.cs

@@ -226,7 +226,7 @@ private static void IsOpenPropertyChangedCallback(DependencyObject dependencyObj
         {
             var dialogHost = (DialogHost)dependencyObject;            
 
-            VisualStateManager.GoToState(dialogHost, dialogHost.SelectState(), true);
+            VisualStateManager.GoToState(dialogHost, dialogHost.SelectState(), !TransitionAssist.GetDisableTransitions(dialogHost));
 
             if (!dialogHost.IsOpen)
             {

MaterialDesignThemes.Wpf/DrawerHost.cs

@@ -117,10 +117,10 @@ private void UpdateVisualStates(bool useTransitions)
             var anyOpen = IsLeftDrawerOpen;
 
             VisualStateManager.GoToState(this,
-                !anyOpen ? TemplateAllDrawersAllClosedStateName : TemplateAllDrawersAnyOpenStateName, useTransitions);
+                !anyOpen ? TemplateAllDrawersAllClosedStateName : TemplateAllDrawersAnyOpenStateName, !TransitionAssist.GetDisableTransitions(this));
 
             VisualStateManager.GoToState(this,
-                IsLeftDrawerOpen ? TemplateLeftOpenStateName : TemplateLeftClosedStateName, useTransitions);
+                IsLeftDrawerOpen ? TemplateLeftOpenStateName : TemplateLeftClosedStateName, !TransitionAssist.GetDisableTransitions(this));
         }
 
         private static void IsLeftDrawerOpenPropertyChangedCallback(DependencyObject dependencyObject, DependencyPropertyChangedEventArgs dependencyPropertyChangedEventArgs)

MaterialDesignThemes.Wpf/MaterialDesignThemes.Wpf.csproj

@@ -268,6 +268,7 @@
     <Compile Include="ToolTipAssist.cs" />
     <Compile Include="RippleAssist.cs" />
     <Compile Include="Ripple.cs" />
+    <Compile Include="TransitionAssist.cs" />
     <Compile Include="Underline.cs" />
     <Compile Include="ValidationAssist.cs" />
     <EmbeddedResource Include="Properties\Resources.resx">

MaterialDesignThemes.Wpf/Themes/Generic.xaml

@@ -507,15 +507,19 @@
                                 <VisualState x:Name="Open">
                                     <Storyboard>
                                         <BooleanAnimationUsingKeyFrames Storyboard.TargetName="PART_Popup" Storyboard.TargetProperty="IsOpen">
-                                            <DiscreteBooleanKeyFrame Value="True" />
+                                            <DiscreteBooleanKeyFrame Value="True" KeyTime="0" />
                                         </BooleanAnimationUsingKeyFrames>
                                         <DoubleAnimation Storyboard.TargetName="ContentGrid" Storyboard.TargetProperty="Opacity"
+                                                         Duration="0"
                                                          To=".56" />
                                         <DoubleAnimation Storyboard.TargetName="PART_PopupContentElement" Storyboard.TargetProperty="Opacity"
+                                                         Duration="0"
                                                          To="1" />
                                         <DoubleAnimation Storyboard.TargetName="CardScaleTransform" Storyboard.TargetProperty="ScaleX"
+                                                         Duration="0"
                                                          To="1" />
                                         <DoubleAnimation Storyboard.TargetName="CardScaleTransform" Storyboard.TargetProperty="ScaleY"
+                                                         Duration="0"
                                                          To="1" />
                                     </Storyboard>
                                 </VisualState>

MaterialDesignThemes.Wpf/TransitionAssist.cs

@@ -0,0 +1,32 @@
+using System.Windows;
+
+namespace MaterialDesignThemes.Wpf
+{
+    /// <summary>
+    /// Allows transitions to be disabled where supported.
+    /// </summary>
+    public static class TransitionAssist
+    {
+        /// <summary>
+        /// Allows transitions to be disabled where supported.  Note this is an inheritable property.
+        /// </summary>
+        public static readonly DependencyProperty DisableTransitionsProperty = DependencyProperty.RegisterAttached(
+            "DisableTransitions", typeof (bool), typeof (TransitionAssist), new FrameworkPropertyMetadata(default(bool), FrameworkPropertyMetadataOptions.Inherits));
+
+        /// <summary>
+        /// Allows transitions to be disabled where supported.  Note this is an inheritable property.
+        /// </summary>
+        public static void SetDisableTransitions(DependencyObject element, bool value)
+        {
+            element.SetValue(DisableTransitionsProperty, value);
+        }
+
+        /// <summary>
+        /// Allows transitions to be disabled where supported.  Note this is an inheritable property.
+        /// </summary>
+        public static bool GetDisableTransitions(DependencyObject element)
+        {
+            return (bool) element.GetValue(DisableTransitionsProperty);
+        }
+    }
+}