add Android version

2020-05-11 23:18:38 +08:00
parent 9f5685a2f8
commit 4561bc2674
53 changed files with 14716 additions and 63 deletions
--- a/Pixiview.Android/Renderers/CardViewRenderer.cs
+++ b/Pixiview.Android/Renderers/CardViewRenderer.cs
@ -0,0 +1,65 @@
+using Android.Content;
+using Android.Graphics;
+using Android.Views;
+using Pixiview.Droid.Renderers;
+using Pixiview.UI;
+using Xamarin.Forms;
+using Xamarin.Forms.Platform.Android;
+
+[assembly: ExportRenderer(typeof(CardView), typeof(CardViewRenderer))]
+namespace Pixiview.Droid.Renderers
+{
+    public class CardViewRenderer : VisualElementRenderer<CardView>
+    {
+        ViewOutlineProvider original;
+
+        public CardViewRenderer(Context context) : base(context)
+        {
+        }
+
+        protected override void OnElementChanged(ElementChangedEventArgs<CardView> e)
+        {
+            base.OnElementChanged(e);
+
+            var element = e.NewElement;
+            if (element != null)
+            {
+                var radius = element.CornerRadius;
+                if (radius > 0)
+                {
+                    original = OutlineProvider;
+                    OutlineProvider = new CornerRadiusOutlineProvider(element, radius);
+                    ClipToOutline = true;
+                }
+            }
+        }
+
+        protected override void OnDetachedFromWindow()
+        {
+            OutlineProvider = original;
+            base.OnDetachedFromWindow();
+        }
+
+        private class CornerRadiusOutlineProvider : ViewOutlineProvider
+        {
+            private readonly Element element;
+            private readonly float radius;
+
+            public CornerRadiusOutlineProvider(Element from, float r)
+            {
+                element = from;
+                radius = r;
+            }
+
+            public override void GetOutline(Android.Views.View view, Outline outline)
+            {
+                var scale = view.Resources.DisplayMetrics.Density;
+                var width = (double)element.GetValue(VisualElement.WidthProperty) * scale;
+                var height = (double)element.GetValue(VisualElement.HeightProperty) * scale;
+
+                var rect = new Rect(0, 0, (int)width, (int)height);
+                outline.SetRoundRect(rect, radius * scale);
+            }
+        }
+    }
+}