Centralize Theme Wrapper and fix sandbox to work with previewer (#5495)

* Centralize Theme Wrapper and fix sandbox to work with previewer

* simplify

* Update Xamarin.Forms.Material.Android/MaterialContextThemeWrapper.cs

Co-Authored-By: PureWeen <shane94@hotmail.com>

* Update Xamarin.Forms.Material.Android/MaterialContextThemeWrapper.cs

Co-Authored-By: PureWeen <shane94@hotmail.com>

* Update Xamarin.Forms.Material.Android/MaterialContextThemeWrapper.cs

Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/VisualControlsPage.xaml

@@ -69,6 +69,9 @@
             <Label Text="Custom" Margin="0,0,0,-10" />
             <ProgressBar Progress="0.5" ProgressColor="{StaticResource PrimaryColor}" BackgroundColor="{StaticResource SecondaryColor}" />
 
+            <Label Text="Height 20" Margin="0,0,0,-10" />
+            <ProgressBar Progress="0.5" HeightRequest="20" ProgressColor="{StaticResource PrimaryColor}" BackgroundColor="{StaticResource SecondaryColor}" />
+
 
             <Label Text="Buttons" FontSize="Large" />
 

Xamarin.Forms.Material.Android/MaterialActivityIndicatorRenderer.cs

@@ -29,7 +29,7 @@ namespace Xamarin.Forms.Material.Android
 		public MaterialActivityIndicatorRenderer(Context context)
 			: base(context)
 		{
-			_control = new CircularProgress(new ContextThemeWrapper(context, Resource.Style.XamarinFormsMaterialProgressBarCircular), null, Resource.Style.XamarinFormsMaterialProgressBarCircular)
+			_control = new CircularProgress(MaterialContextThemeWrapper.Create(context), null, Resource.Attribute.materialProgressBarCircularStyle)
 			{
 				// limiting size to compare iOS realization
 				// https://github.com/material-components/material-components-ios/blob/develop/components/ActivityIndicator/src/MDCActivityIndicator.m#L425

Xamarin.Forms.Material.Android/MaterialButtonRenderer.cs

@@ -41,7 +41,7 @@ namespace Xamarin.Forms.Material.Android
 		readonly AutomationPropertiesProvider _automationPropertiesProvider;
 		
 		public MaterialButtonRenderer(Context context)
-			: base(new ContextThemeWrapper(context, Resource.Style.XamarinFormsMaterialTheme))
+			: base(MaterialContextThemeWrapper.Create(context))
 		{
 			_automationPropertiesProvider = new AutomationPropertiesProvider(this);
 			_buttonLayoutManager = new ButtonLayoutManager(this,

Xamarin.Forms.Material.Android/MaterialContextThemeWrapper.cs

@@ -2,23 +2,28 @@
 using Android.Content;
 using Android.Views;
 using Xamarin.Forms.Platform.Android;
+using AndroidAppCompat = Android.Support.V7.Content.Res.AppCompatResources;
 
 namespace Xamarin.Forms.Material.Android
 {
 	public class MaterialContextThemeWrapper : ContextThemeWrapper
 	{
-		public MaterialContextThemeWrapper(Context context) : base(context, Resource.Style.XamarinFormsMaterialTheme)
+		public MaterialContextThemeWrapper(Context context) : this(context, Resource.Style.XamarinFormsMaterialTheme)
 		{
 		}
 
-
-		public static Context Create(Context context)
+		MaterialContextThemeWrapper(Context context, int themeResId) : base(context, themeResId)
 		{
-			if (context is MaterialContextThemeWrapper)
-				return context;
+
+		}
+
+		public static MaterialContextThemeWrapper Create(Context context)
+		{
+			if (context is MaterialContextThemeWrapper materialContext)
+				return materialContext;
 
 			return new MaterialContextThemeWrapper(context);
 		}
 	}
 }
-#endif
+#endif

Xamarin.Forms.Material.Android/MaterialFrameRenderer.cs

@@ -32,7 +32,7 @@ namespace Xamarin.Forms.Material.Android
 		readonly MotionEventHelper _motionEventHelper;
 
 		public MaterialFrameRenderer(Context context)
-			: base(new ContextThemeWrapper(context, Resource.Style.XamarinFormsMaterialTheme))
+			: base(MaterialContextThemeWrapper.Create(context))
 		{
 			_gestureManager = new GestureManager(this);
 			_effectControlProvider = new EffectControlProvider(this);

Xamarin.Forms.Material.Android/MaterialProgressBarRenderer.cs

@@ -26,7 +26,7 @@ namespace Xamarin.Forms.Material.Android
 		MotionEventHelper _motionEventHelper;
 		
 		public MaterialProgressBarRenderer(Context context)
-			: base(new ContextThemeWrapper(context, Resource.Style.XamarinFormsMaterialProgressBarHorizontal), null, Resource.Style.XamarinFormsMaterialProgressBarHorizontal)
+			: base(MaterialContextThemeWrapper.Create(context), null, Resource.Attribute.materialProgressBarHorizontalStyle)
 		{
 			Indeterminate = false;
 			Max = MaximumValue;

Xamarin.Forms.Material.Android/MaterialSliderRenderer.cs

@@ -29,7 +29,7 @@ namespace Xamarin.Forms.Material.Android
 		double _min = 0.0;
 
 		public MaterialSliderRenderer(Context context)
-			: base(new ContextThemeWrapper(context, Resource.Style.XamarinFormsMaterialSlider), null, Resource.Style.XamarinFormsMaterialSlider)
+			: base(MaterialContextThemeWrapper.Create(context), null, Resource.Attribute.materialSliderStyle)
 		{
 			SetOnSeekBarChangeListener(this);
 			Max = (int)MaximumValue;

Xamarin.Forms.Material.Android/Resources/values/styles.xml

@@ -2,11 +2,17 @@
 <resources>
 
   <attr name="materialOutlinedButtonStyle" format="reference"/>
+  <attr name="materialSliderStyle" format="reference"/>
+  <attr name="materialProgressBarHorizontalStyle" format="reference"/>
+  <attr name="materialProgressBarCircularStyle" format="reference"/>
 
   <!-- Material Base Theme -->
   <style name="XamarinFormsMaterialTheme" parent="Theme.MaterialComponents.Light.DarkActionBar">
     <item name="materialButtonStyle">@style/XamarinFormsMaterialButton</item>
     <item name="materialOutlinedButtonStyle">@style/XamarinFormsMaterialButtonOutlined</item>
+    <item name="materialSliderStyle">@style/XamarinFormsMaterialSlider</item>
+    <item name="materialProgressBarHorizontalStyle">@style/XamarinFormsMaterialProgressBarHorizontal</item>
+    <item name="materialProgressBarCircularStyle">@style/XamarinFormsMaterialProgressBarCircular</item>
   </style>
 
   <!-- Material Sliders -->