Added ProgressBarRenderer

* SliderRenderer.Value/Minimum/Maximum are treated as a fixed point value. (1/100)

WinFormsTestApp/Page2.xaml

@@ -8,6 +8,14 @@
             BackgroundColor="Yellow"
             CornerRadius="8">
             <Image Source="https://assets-cdn.github.com/images/modules/logos_page/GitHub-Logo.png" Aspect="AspectFill"/>
+            <!--<Grid>
+                <Grid.RowDefinitions>
+                    <RowDefinition />
+                    <RowDefinition />
+                </Grid.RowDefinitions>
+                <ProgressBar Grid.Row="0" Progress="{Binding Source={x:Reference slider}, Path=Value}" />
+                <Slider Grid.Row="1" Value="0" Minimum="0" Maximum="1" x:Name="slider" />
+            </Grid>-->
         </Frame>
     </ContentPage.Content>
 </ContentPage>

Xamarin.Forms.Platform.WinForms/Properties/AssemblyInfo.cs

@@ -54,6 +54,7 @@ using Xamarin.Forms.Platform.WinForms;
 [assembly: ExportRenderer(typeof(DatePicker), typeof(DatePickerRenderer))]
 [assembly: ExportRenderer(typeof(Frame), typeof(FrameRenderer))]
 [assembly: ExportRenderer(typeof(Image), typeof(ImageRenderer))]
+[assembly: ExportRenderer(typeof(ProgressBar), typeof(ProgressBarRenderer))]
 [assembly: ExportRenderer(typeof(OpenGLView), typeof(OpenGLViewRenderer))]
 [assembly: ExportRenderer(typeof(WebView), typeof(WebViewRenderer))]
 

Xamarin.Forms.Platform.WinForms/Renderers/ProgressBarRenderer.cs

@@ -0,0 +1,37 @@
+using System;
+using System.ComponentModel;
+using WForms = System.Windows.Forms;
+
+namespace Xamarin.Forms.Platform.WinForms
+{
+	public class ProgressBarRenderer : ViewRenderer<ProgressBar, WForms.ProgressBar>
+	{
+		protected override void OnElementChanged(ElementChangedEventArgs<ProgressBar> e)
+		{
+			if (e.NewElement != null)
+			{
+				if (Control == null)
+				{
+					SetNativeControl(new WForms.ProgressBar { Minimum = 0, Maximum = 100 });
+				}
+
+				UpdateProgress();
+			}
+
+			base.OnElementChanged(e);
+		}
+
+		protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
+		{
+			base.OnElementPropertyChanged(sender, e);
+
+			if (e.PropertyName == ProgressBar.ProgressProperty.PropertyName)
+				UpdateProgress();
+		}
+
+		void UpdateProgress()
+		{
+			UpdatePropertyHelper((element, control) => control.Value = (int)(element.Progress * 100.0));
+		}
+	}
+}

Xamarin.Forms.Platform.WinForms/Renderers/SliderRenderer.cs

@@ -6,6 +6,8 @@ namespace Xamarin.Forms.Platform.WinForms
 {
 	public class SliderRenderer : ViewRenderer<Slider, WForms.TrackBar>
 	{
+		public static readonly int Scale = 100;
+
 		/*-----------------------------------------------------------------*/
 		#region Event Handler
 
@@ -56,7 +58,7 @@ namespace Xamarin.Forms.Platform.WinForms
 
 		void OnValueChanged(object sender, EventArgs e)
 		{
-			((IElementController)Element).SetValueFromRenderer(Slider.ValueProperty, Control.Value);
+			((IElementController)Element).SetValueFromRenderer(Slider.ValueProperty, (double)Control.Value / Scale);
 		}
 
 
@@ -67,26 +69,17 @@ namespace Xamarin.Forms.Platform.WinForms
 
 		void UpdateValue()
 		{
-			if (Control != null && Element != null)
-			{
-				Control.Value = (int)Element.Value;
-			}
+			UpdatePropertyHelper((element, control) => control.Value = (int)(element.Value * Scale));
 		}
 
 		void UpdateMinimum()
 		{
-			if (Control != null && Element != null)
-			{
-				Control.Minimum = (int)Element.Minimum;
-			}
+			UpdatePropertyHelper((element, control) => control.Minimum = (int)(element.Minimum * Scale));
 		}
 
 		void UpdateMaximum()
 		{
-			if (Control != null && Element != null)
-			{
-				Control.Maximum = (int)Element.Maximum;
-			}
+			UpdatePropertyHelper((element, control) => control.Maximum = (int)(element.Maximum * Scale));
 		}
 
 		#endregion

Xamarin.Forms.Platform.WinForms/Xamarin.Forms.Platform.WinForms.csproj

@@ -80,6 +80,7 @@
     <Compile Include="Renderers\PageRenderer.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="Renderers\PickerRenderer.cs" />
+    <Compile Include="Renderers\ProgressBarRenderer.cs" />
     <Compile Include="Renderers\SliderRenderer.cs" />
     <Compile Include="Renderers\StepperRenderer.cs" />
     <Compile Include="Renderers\SwitchRenderer.cs" />