adjust UI

Gallery.Share/Views/GalleryPage.xaml.cs

@@ -0,0 +1,66 @@
+using System.Collections.Generic;
+using System.Threading.Tasks;
+using Gallery.Resources.UI;
+using Gallery.Util;
+using Gallery.Util.Interface;
+using Gallery.Util.Model;
+using Xamarin.Forms;
+
+namespace Gallery.Views
+{
+    public partial class GalleryPage : GalleryCollectionPage
+    {
+        private int currentPage;
+
+        public GalleryPage(IGallerySource source) : base(source)
+        {
+            Resources.Add("cardView", GetCardViewTemplate());
+            InitializeComponent();
+
+            currentPage = 1;
+        }
+
+        protected override ActivityIndicator LoadingIndicator => activityLoading;
+
+        protected override void OnAppearing()
+        {
+            if (currentPage != 1 && Gallery == null)
+            {
+                currentPage = 1;
+            }
+            base.OnAppearing();
+        }
+
+        protected override async Task<GalleryItem[]> DoloadGalleryData(bool force)
+        {
+            var result = await source.GetRecentItemsAsync(currentPage);
+            return result;
+        }
+
+        protected override IEnumerable<GalleryItem> DoGetGalleryList(GalleryItem[] data, out int tag)
+        {
+            tag = currentPage;
+            return data;
+        }
+
+        private void FlowLayout_MaxHeightChanged(object sender, HeightEventArgs e)
+        {
+            SetOffset(e.ContentHeight - scrollView.Bounds.Height - SCROLL_OFFSET);
+        }
+
+        protected override bool CheckRefresh()
+        {
+            currentPage++;
+#if DEBUG
+            Log.Print($"loading page: {currentPage}");
+#endif
+            return true;
+        }
+
+        private void ScrollView_Scrolled(object sender, ScrolledEventArgs e)
+        {
+            var y = e.ScrollY;
+            OnScrolled(y);
+        }
+    }
+}