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Diffstat (limited to 'Xamarin.Forms.Platform.Android/Renderers/SliderRenderer.cs')
-rw-r--r--Xamarin.Forms.Platform.Android/Renderers/SliderRenderer.cs98
1 files changed, 98 insertions, 0 deletions
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