feature: long press to save original illust

2020-05-08 14:27:15 +08:00
parent e2ecabc224
commit 59cc3a77c9
14 changed files with 237 additions and 102 deletions
--- a/Pixiview.iOS/Effects/LongPressEffectImplement.cs
+++ b/Pixiview.iOS/Effects/LongPressEffectImplement.cs
@ -0,0 +1,58 @@
+using System.Threading.Tasks;
+using Pixiview.iOS.Effects;
+using Pixiview.Utils;
+using UIKit;
+using Xamarin.Forms;
+using Xamarin.Forms.Platform.iOS;
+
+[assembly: ResolutionGroupName("Pixiview")]
+[assembly: ExportEffect(typeof(LongPressEffectImplement), "LongPressEffect")]
+namespace Pixiview.iOS.Effects
+{
+    public class LongPressEffectImplement : PlatformEffect
+    {
+        private bool attached;
+        private readonly UILongPressGestureRecognizer longPressGesture;
+
+        public LongPressEffectImplement()
+        {
+            longPressGesture = new UILongPressGestureRecognizer(OnLongPressed);
+        }
+
+        protected override void OnAttached()
+        {
+            if (!attached)
+            {
+                attached = true;
+                Container.AddGestureRecognizer(longPressGesture);
+            }
+        }
+
+        protected override void OnDetached()
+        {
+            if (attached)
+            {
+                attached = false;
+                Container.RemoveGestureRecognizer(longPressGesture);
+            }
+        }
+
+        private void OnLongPressed(UILongPressGestureRecognizer e)
+        {
+            if (e.State != UIGestureRecognizerState.Began)
+            {
+                return;
+            }
+            var element = Element;
+            if (element != null)
+            {
+                var command = LongPressEffect.GetCommand(element);
+                if (command != null)
+                {
+                    var o = LongPressEffect.GetCommandParameter(element);
+                    command.Execute(o);
+                }
+            }
+        }
+    }
+}