From 17fdde66d94155fc62a034fa6658995bef6fd6e5 Mon Sep 17 00:00:00 2001
From: Jason Smith <jason.smith@xamarin.com>
Date: Tue, 22 Mar 2016 13:02:25 -0700
Subject: Initial import

---
 .../Renderers/SliderRenderer.cs                    | 98 ++++++++++++++++++++++
 1 file changed, 98 insertions(+)
 create mode 100644 Xamarin.Forms.Platform.Android/Renderers/SliderRenderer.cs

(limited to 'Xamarin.Forms.Platform.Android/Renderers/SliderRenderer.cs')

diff --git a/Xamarin.Forms.Platform.Android/Renderers/SliderRenderer.cs b/Xamarin.Forms.Platform.Android/Renderers/SliderRenderer.cs
new file mode 100644
index 00000000..694052ef
--- /dev/null
+++ b/Xamarin.Forms.Platform.Android/Renderers/SliderRenderer.cs
@@ -0,0 +1,98 @@
+using System.ComponentModel;
+using Android.Graphics.Drawables;
+using Android.OS;
+using Android.Widget;
+
+namespace Xamarin.Forms.Platform.Android
+{
+	public class SliderRenderer : ViewRenderer<Slider, SeekBar>, SeekBar.IOnSeekBarChangeListener
+	{
+		double _max;
+		double _min;
+
+		public SliderRenderer()
+		{
+			AutoPackage = false;
+		}
+
+		double Value
+		{
+			get { return _min + (_max - _min) * (Control.Progress / 1000.0); }
+			set { Control.Progress = (int)((value - _min) / (_max - _min) * 1000.0); }
+		}
+
+		void SeekBar.IOnSeekBarChangeListener.OnProgressChanged(SeekBar seekBar, int progress, bool fromUser)
+		{
+			((IElementController)Element).SetValueFromRenderer(Slider.ValueProperty, Value);
+		}
+
+		void SeekBar.IOnSeekBarChangeListener.OnStartTrackingTouch(SeekBar seekBar)
+		{
+		}
+
+		void SeekBar.IOnSeekBarChangeListener.OnStopTrackingTouch(SeekBar seekBar)
+		{
+		}
+
+		protected override void OnElementChanged(ElementChangedEventArgs<Slider> e)
+		{
+			base.OnElementChanged(e);
+
+			if (e.OldElement == null)
+			{
+				var seekBar = new SeekBar(Context);
+				SetNativeControl(seekBar);
+
+				seekBar.Max = 1000;
+
+				seekBar.SetOnSeekBarChangeListener(this);
+			}
+
+			Slider slider = e.NewElement;
+			_min = slider.Minimum;
+			_max = slider.Maximum;
+			Value = slider.Value;
+		}
+
+		protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
+		{
+			base.OnElementPropertyChanged(sender, e);
+
+			Slider view = Element;
+			switch (e.PropertyName)
+			{
+				case "Maximum":
+					_max = view.Maximum;
+					break;
+				case "Minimum":
+					_min = view.Minimum;
+					break;
+				case "Value":
+					if (Value != view.Value)
+						Value = view.Value;
+					break;
+			}
+		}
+
+		protected override void OnLayout(bool changed, int l, int t, int r, int b)
+		{
+			base.OnLayout(changed, l, t, r, b);
+
+			BuildVersionCodes androidVersion = Build.VERSION.SdkInt;
+			if (androidVersion >= BuildVersionCodes.JellyBean)
+			{
+				// Thumb only supported JellyBean and higher
+
+				if (Control == null)
+					return;
+
+				SeekBar seekbar = Control;
+
+				Drawable thumb = seekbar.Thumb;
+				int thumbTop = seekbar.Height / 2 - thumb.IntrinsicHeight / 2;
+
+				thumb.SetBounds(thumb.Bounds.Left, thumbTop, thumb.Bounds.Left + thumb.IntrinsicWidth, thumbTop + thumb.IntrinsicHeight);
+			}
+		}
+	}
+}
\ No newline at end of file
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