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/IndicatorViewHandler.cs
+++ b/Handlers/IndicatorViewHandler.cs
@@ -0,0 +1,157 @@
+// 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 IndicatorView on Linux using Skia rendering.
+/// Maps IndicatorView to SkiaIndicatorView platform view.
+/// </summary>
+public partial class IndicatorViewHandler : ViewHandler<IndicatorView, SkiaIndicatorView>
+{
+    private bool _isUpdatingPosition;
+
+    public static IPropertyMapper<IndicatorView, IndicatorViewHandler> Mapper =
+        new PropertyMapper<IndicatorView, IndicatorViewHandler>(ViewHandler.ViewMapper)
+        {
+            [nameof(IndicatorView.Count)] = MapCount,
+            [nameof(IndicatorView.Position)] = MapPosition,
+            [nameof(IndicatorView.IndicatorColor)] = MapIndicatorColor,
+            [nameof(IndicatorView.SelectedIndicatorColor)] = MapSelectedIndicatorColor,
+            [nameof(IndicatorView.IndicatorSize)] = MapIndicatorSize,
+            [nameof(IndicatorView.IndicatorsShape)] = MapIndicatorsShape,
+            [nameof(IndicatorView.MaximumVisible)] = MapMaximumVisible,
+            [nameof(IndicatorView.HideSingle)] = MapHideSingle,
+            [nameof(IndicatorView.ItemsSource)] = MapItemsSource,
+        };
+
+    public static CommandMapper<IndicatorView, IndicatorViewHandler> CommandMapper =
+        new(ViewHandler.ViewCommandMapper)
+        {
+        };
+
+    public IndicatorViewHandler() : base(Mapper, CommandMapper)
+    {
+    }
+
+    public IndicatorViewHandler(IPropertyMapper? mapper, CommandMapper? commandMapper = null)
+        : base(mapper ?? Mapper, commandMapper ?? CommandMapper)
+    {
+    }
+
+    protected override SkiaIndicatorView CreatePlatformView()
+    {
+        return new SkiaIndicatorView();
+    }
+
+    protected override void ConnectHandler(SkiaIndicatorView platformView)
+    {
+        base.ConnectHandler(platformView);
+        // SkiaIndicatorView doesn't have position changed event, but we can add one if needed
+    }
+
+    protected override void DisconnectHandler(SkiaIndicatorView platformView)
+    {
+        base.DisconnectHandler(platformView);
+    }
+
+    public static void MapCount(IndicatorViewHandler handler, IndicatorView indicatorView)
+    {
+        if (handler.PlatformView is null) return;
+        handler.PlatformView.Count = indicatorView.Count;
+    }
+
+    public static void MapPosition(IndicatorViewHandler handler, IndicatorView indicatorView)
+    {
+        if (handler.PlatformView is null || handler._isUpdatingPosition) return;
+
+        try
+        {
+            handler._isUpdatingPosition = true;
+            handler.PlatformView.Position = indicatorView.Position;
+        }
+        finally
+        {
+            handler._isUpdatingPosition = false;
+        }
+    }
+
+    public static void MapIndicatorColor(IndicatorViewHandler handler, IndicatorView indicatorView)
+    {
+        if (handler.PlatformView is null) return;
+
+        if (indicatorView.IndicatorColor is not null)
+        {
+            handler.PlatformView.IndicatorColor = indicatorView.IndicatorColor.ToSKColor();
+        }
+    }
+
+    public static void MapSelectedIndicatorColor(IndicatorViewHandler handler, IndicatorView indicatorView)
+    {
+        if (handler.PlatformView is null) return;
+
+        if (indicatorView.SelectedIndicatorColor is not null)
+        {
+            handler.PlatformView.SelectedIndicatorColor = indicatorView.SelectedIndicatorColor.ToSKColor();
+        }
+    }
+
+    public static void MapIndicatorSize(IndicatorViewHandler handler, IndicatorView indicatorView)
+    {
+        if (handler.PlatformView is null) return;
+        handler.PlatformView.IndicatorSize = (float)indicatorView.IndicatorSize;
+        handler.PlatformView.SelectedIndicatorSize = (float)indicatorView.IndicatorSize;
+    }
+
+    public static void MapIndicatorsShape(IndicatorViewHandler handler, IndicatorView indicatorView)
+    {
+        if (handler.PlatformView is null) return;
+
+        handler.PlatformView.IndicatorShape = indicatorView.IndicatorsShape switch
+        {
+            Controls.IndicatorShape.Circle => Platform.IndicatorShape.Circle,
+            Controls.IndicatorShape.Square => Platform.IndicatorShape.Square,
+            _ => Platform.IndicatorShape.Circle
+        };
+    }
+
+    public static void MapMaximumVisible(IndicatorViewHandler handler, IndicatorView indicatorView)
+    {
+        if (handler.PlatformView is null) return;
+        handler.PlatformView.MaximumVisible = indicatorView.MaximumVisible;
+    }
+
+    public static void MapHideSingle(IndicatorViewHandler handler, IndicatorView indicatorView)
+    {
+        if (handler.PlatformView is null) return;
+        handler.PlatformView.HideSingle = indicatorView.HideSingle;
+    }
+
+    public static void MapItemsSource(IndicatorViewHandler handler, IndicatorView indicatorView)
+    {
+        if (handler.PlatformView is null) return;
+
+        // Count items from ItemsSource
+        int count = 0;
+        if (indicatorView.ItemsSource is System.Collections.ICollection collection)
+        {
+            count = collection.Count;
+        }
+        else if (indicatorView.ItemsSource is System.Collections.IEnumerable enumerable)
+        {
+            foreach (var _ in enumerable)
+            {
+                count++;
+            }
+        }
+
+        handler.PlatformView.Count = count;
+    }
+}