feat: 添加对悬停项关联的聚焦显示支持的支持，更新相关绘制逻辑以增强用户体验

Author: heartacker

src/Models/CommitGraph.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Linq;
 
 using Avalonia;
 using Avalonia.Media;
@@ -32,6 +33,8 @@ public class Path(int color, bool isMerged)
             public List<Point> Points { get; } = [];
             public int Color { get; } = color;
             public bool IsMerged { get; } = isMerged;
+
+            public bool IsHoveredRelated { get; set; } = false;
         }
 
         public class Link

src/ViewModels/Histories.cs

@@ -238,22 +238,28 @@ public void Select(IList commits, object selectedCommit)
         public void ProcessHoveredCommit(Models.Commit commit)
         {
             if (commit == null)
+            {
+                _commits.ForEach(c => c.IsHoveredRelated = false);
+                _graph.Paths.ForEach(p => p.IsHoveredRelated = false);
                 return;
+            }
 
             var childrens = this.GetChildrensPathInCurHistory(commit, out _, 0);
-            Console.WriteLine($"=========");
             childrens.Reverse();
 
             _commits.ForEach(c => c.IsHoveredRelated = false);
             childrens.ForEach(c => c.IsHoveredRelated = true);
+
+            _graph.Paths.ForEach(p => p.IsHoveredRelated = false);
+            _graph.Paths[commit.PathIndex].IsHoveredRelated = true;
+            childrens.ForEach(c => _graph.Paths[c.PathIndex].IsHoveredRelated = true);
+
             HoveredCommitIndex = commit.Index;
-            foreach (var c in childrens)
-            {
-                Console.WriteLine($"{c.Index}.{c.Subject}");
-            }
-            System.Console.WriteLine(childrens.Count);
+            // Console.WriteLine($"=========");
+            // foreach (var c in childrens)
+            //     Console.WriteLine($"{c.Index}.{c.Subject}");
+            // System.Console.WriteLine(childrens.Count);
         }
-
         public void MarkLastSelectedCommitsAsSelected(params IList<Models.Commit> commits)
         {
             var availableCommits = Commits.Where(x => commits.Any(y => y.SHA == x.SHA)).ToList();

src/Views/CommitGraph.cs

@@ -84,8 +84,9 @@ public override void Render(DrawingContext context)
 
         private void DrawCurves(DrawingContext context, Models.CommitGraph graph, double top, double bottom, double rowHeight)
         {
+            var hoverBold = 2.0;
             var grayedPen = new Pen(new SolidColorBrush(Colors.Gray, 0.4), Models.CommitGraph.Pens[0].Thickness);
-            var grayedPenHover = new Pen(new SolidColorBrush(Colors.Gray, 0.7), Models.CommitGraph.Pens[0].Thickness);
+            var grayedPenHover = new Pen(grayedPen.Brush, grayedPen.Thickness + hoverBold);
             var onlyHighlightCurrentBranch = OnlyHighlightCurrentBranch;
 
             if (onlyHighlightCurrentBranch)
@@ -127,6 +128,7 @@ private void DrawCurves(DrawingContext context, Models.CommitGraph graph, double
 
                 var geo = new StreamGeometry();
                 var pen = Models.CommitGraph.Pens[line.Color];
+                var penHover = new Pen(pen.Brush, pen.Thickness + hoverBold);
 
                 using (var ctx = geo.Open())
                 {
@@ -182,9 +184,9 @@ private void DrawCurves(DrawingContext context, Models.CommitGraph graph, double
 
 
                 if (!line.IsMerged && onlyHighlightCurrentBranch)
-                    context.DrawGeometry(null, grayedPen, geo);
+                    context.DrawGeometry(null, line.IsHoveredRelated ? grayedPenHover : grayedPen, geo);
                 else
-                    context.DrawGeometry(null, pen, geo);
+                    context.DrawGeometry(null, line.IsHoveredRelated ? penHover : pen, geo);
             }
 
             foreach (var link in graph.Links)