CollectionView completed

2026-01-17 01:18:57 +00:00
parent b1749b1347
commit 868ce1fcae
4 changed files with 789 additions and 0 deletions
--- a/Handlers/RefreshViewHandler.cs
+++ b/Handlers/RefreshViewHandler.cs
@@ -0,0 +1,151 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using Microsoft.Maui.Handlers;
+using Microsoft.Maui.Graphics;
+using Microsoft.Maui.Controls;
+using Microsoft.Maui.Platform;
+using Microsoft.Maui.Platform.Linux.Hosting;
+using SkiaSharp;
+
+namespace Microsoft.Maui.Platform.Linux.Handlers;
+
+/// <summary>
+/// Handler for RefreshView on Linux using Skia rendering.
+/// Maps RefreshView to SkiaRefreshView platform view.
+/// </summary>
+public partial class RefreshViewHandler : ViewHandler<RefreshView, SkiaRefreshView>
+{
+    private bool _isUpdatingRefreshing;
+
+    public static IPropertyMapper<RefreshView, RefreshViewHandler> Mapper =
+        new PropertyMapper<RefreshView, RefreshViewHandler>(ViewHandler.ViewMapper)
+        {
+            [nameof(RefreshView.Content)] = MapContent,
+            [nameof(RefreshView.IsRefreshing)] = MapIsRefreshing,
+            [nameof(RefreshView.RefreshColor)] = MapRefreshColor,
+            [nameof(RefreshView.Command)] = MapCommand,
+            [nameof(RefreshView.CommandParameter)] = MapCommandParameter,
+            [nameof(IView.Background)] = MapBackground,
+        };
+
+    public static CommandMapper<RefreshView, RefreshViewHandler> CommandMapper =
+        new(ViewHandler.ViewCommandMapper)
+        {
+        };
+
+    public RefreshViewHandler() : base(Mapper, CommandMapper)
+    {
+    }
+
+    public RefreshViewHandler(IPropertyMapper? mapper, CommandMapper? commandMapper = null)
+        : base(mapper ?? Mapper, commandMapper ?? CommandMapper)
+    {
+    }
+
+    protected override SkiaRefreshView CreatePlatformView()
+    {
+        return new SkiaRefreshView();
+    }
+
+    protected override void ConnectHandler(SkiaRefreshView platformView)
+    {
+        base.ConnectHandler(platformView);
+        platformView.Refreshing += OnRefreshing;
+    }
+
+    protected override void DisconnectHandler(SkiaRefreshView platformView)
+    {
+        platformView.Refreshing -= OnRefreshing;
+        base.DisconnectHandler(platformView);
+    }
+
+    private void OnRefreshing(object? sender, EventArgs e)
+    {
+        if (VirtualView is null || _isUpdatingRefreshing) return;
+
+        try
+        {
+            _isUpdatingRefreshing = true;
+
+            // Notify the virtual view that refreshing has started
+            VirtualView.IsRefreshing = true;
+
+            // The command will be executed by the platform view
+        }
+        finally
+        {
+            _isUpdatingRefreshing = false;
+        }
+    }
+
+    public static void MapContent(RefreshViewHandler handler, RefreshView refreshView)
+    {
+        if (handler.PlatformView is null || handler.MauiContext is null) return;
+
+        var content = refreshView.Content;
+        if (content == null)
+        {
+            handler.PlatformView.Content = null;
+            return;
+        }
+
+        // Create handler for content
+        if (content.Handler == null)
+        {
+            content.Handler = content.ToViewHandler(handler.MauiContext);
+        }
+
+        if (content.Handler?.PlatformView is SkiaView skiaContent)
+        {
+            handler.PlatformView.Content = skiaContent;
+        }
+    }
+
+    public static void MapIsRefreshing(RefreshViewHandler handler, RefreshView refreshView)
+    {
+        if (handler.PlatformView is null || handler._isUpdatingRefreshing) return;
+
+        try
+        {
+            handler._isUpdatingRefreshing = true;
+            handler.PlatformView.IsRefreshing = refreshView.IsRefreshing;
+        }
+        finally
+        {
+            handler._isUpdatingRefreshing = false;
+        }
+    }
+
+    public static void MapRefreshColor(RefreshViewHandler handler, RefreshView refreshView)
+    {
+        if (handler.PlatformView is null) return;
+
+        if (refreshView.RefreshColor is not null)
+        {
+            handler.PlatformView.RefreshColor = refreshView.RefreshColor.ToSKColor();
+        }
+    }
+
+    public static void MapCommand(RefreshViewHandler handler, RefreshView refreshView)
+    {
+        if (handler.PlatformView is null) return;
+        handler.PlatformView.Command = refreshView.Command;
+    }
+
+    public static void MapCommandParameter(RefreshViewHandler handler, RefreshView refreshView)
+    {
+        if (handler.PlatformView is null) return;
+        handler.PlatformView.CommandParameter = refreshView.CommandParameter;
+    }
+
+    public static void MapBackground(RefreshViewHandler handler, RefreshView refreshView)
+    {
+        if (handler.PlatformView is null) return;
+
+        if (refreshView.Background is SolidColorBrush solidBrush)
+        {
+            handler.PlatformView.RefreshBackgroundColor = solidBrush.Color.ToSKColor();
+        }
+    }
+}