251029

FATrace.WPLApp/RegionAdapter/SfNavigationDrawerRegionAdapter.cs

@@ -0,0 +1,93 @@
+using Prism.Regions;
+using Syncfusion.UI.Xaml.NavigationDrawer;
+using System;
+using System.Collections.Generic;
+using System.Collections.Specialized;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+
+namespace FATrace.WPLApp.RegionAdapter
+{
+    public class SfNavigationDrawerRegionAdapter : RegionAdapterBase<SfNavigationDrawer>
+    {
+        public SfNavigationDrawerRegionAdapter(IRegionBehaviorFactory regionBehaviorFactory)
+        : base(regionBehaviorFactory)
+        {
+        }
+
+        protected override void Adapt(IRegion region, SfNavigationDrawer regionTarget)
+        {
+            {
+                //////Old Version
+
+                //if (regionTarget == null)
+                //    throw new ArgumentNullException(nameof(regionTarget));
+
+                //bool contentIsSet = regionTarget.ContentView != null;
+                //contentIsSet = contentIsSet || null != BindingOperations.GetBinding(regionTarget, ContentControl.ContentProperty);
+
+                //if (contentIsSet)
+                //    throw new InvalidOperationException("ContentControlHasContentException");
+
+                //region.ActiveViews.CollectionChanged += delegate
+                //{
+                //    regionTarget.ContentView = region.ActiveViews.FirstOrDefault();
+                //};
+
+                //region.Views.CollectionChanged +=
+                //(sender, e) =>
+                //{
+                //    if (e.Action == NotifyCollectionChangedAction.Add && region.ActiveViews.Count() == 0)
+                //    {
+                //        region.Activate(e.NewItems[0]);
+                //    }
+                //};
+            }
+
+
+            //New Version
+            if (region == null)
+            {
+                throw new ArgumentNullException(nameof(region));
+            }
+
+            if (regionTarget == null)
+            {
+                throw new ArgumentNullException(nameof(regionTarget));
+            }
+
+            // 处理活动视图变化 - 这是界面切换的关键
+            region.ActiveViews.CollectionChanged += (s, e) =>
+            {
+                // 当有视图被激活时，将其设置为ContentView
+                if (e.Action == NotifyCollectionChangedAction.Add && e.NewItems != null && e.NewItems.Count > 0)
+                {
+                    regionTarget.ContentView = e.NewItems[0] as FrameworkElement;
+                }
+            };
+
+            // 处理视图集合变化
+            region.Views.CollectionChanged += (s, e) =>
+            {
+                // 当添加新视图且没有活动视图时，自动激活它
+                if (e.Action == NotifyCollectionChangedAction.Add &&
+                    e.NewItems != null &&
+                    e.NewItems.Count > 0 &&
+                    region.ActiveViews.Count() == 0)
+                {
+                    region.Activate(e.NewItems[0]);
+                }
+            };
+
+
+        }
+
+        protected override IRegion CreateRegion()
+        {
+            return new SingleActiveRegion();
+            //return new Region();
+        }
+    }
+}