feat: 添加对悬停相关提交的支持，更新图形和视图模型以增强用户交互

Author: heartacker

src/Models/CommitGraph.cs

@@ -57,6 +57,7 @@ public class Dot
             public Point Center;
             public int Color;
             public bool IsMerged;
+            public bool IsHoveredRelated = false;
         }
 
         public List<Path> Paths { get; } = [];

src/ViewModels/Histories.cs

@@ -246,12 +246,13 @@ public void ProcessHoveredCommit(Models.Commit commit)
 
             _commits.ForEach(c => c.IsHoveredRelated = false);
             childrens.ForEach(c => c.IsHoveredRelated = true);
+            Graph.Dots.ForEach(p => p.IsHoveredRelated = false);
+            childrens.ForEach(c => Graph.Dots[c.Index].IsHoveredRelated = true);
+
             HoveredCommitId = commit.Index;
-            foreach (var c in childrens)
-            {
-                Console.WriteLine($"{c.Index}.{c.Subject}");
-            }
-            System.Console.WriteLine(childrens.Count);
+            // foreach (var c in childrens)
+            //     Console.WriteLine($"{c.Index}.{c.Subject}");
+            // System.Console.WriteLine(childrens.Count);
         }
 
         public void MarkLastSelectedCommitsAsSelected(params IList<Models.Commit> commits)

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 = 0.0;
             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)
@@ -217,6 +219,7 @@ private void DrawAnchors(DrawingContext context, Models.CommitGraph graph, doubl
             var dotFillPen = new Pen(dotFill, 2);
             var grayedPen = new Pen(Brushes.Gray, Models.CommitGraph.Pens[0].Thickness);
             var onlyHighlightCurrentBranch = OnlyHighlightCurrentBranch;
+            var hoverBold = 1.0;
 
             foreach (var dot in graph.Dots)
             {
@@ -230,26 +233,27 @@ private void DrawAnchors(DrawingContext context, Models.CommitGraph graph, doubl
                 var pen = Models.CommitGraph.Pens[dot.Color];
                 if (!dot.IsMerged && onlyHighlightCurrentBranch)
                     pen = grayedPen;
+                hoverBold = dot.IsHoveredRelated ? 1 : 0;
 
                 switch (dot.Type)
                 {
                     case Models.CommitGraph.DotType.Head:
-                        context.DrawEllipse(dotFill, pen, center, 6, 6);
+                        context.DrawEllipse(dotFill, pen, center, 6 + hoverBold, 6 + hoverBold);
                         context.DrawEllipse(pen.Brush, null, center, 3, 3);
                         break;
                     case Models.CommitGraph.DotType.Merge:
-                        context.DrawEllipse(pen.Brush, null, center, 6, 6);
+                        context.DrawEllipse(pen.Brush, null, center, 6 + hoverBold, 6 + hoverBold);
                         context.DrawLine(dotFillPen, new Point(center.X, center.Y - 3), new Point(center.X, center.Y + 3));
                         context.DrawLine(dotFillPen, new Point(center.X - 3, center.Y), new Point(center.X + 3, center.Y));
                         break;
                     case Models.CommitGraph.DotType.Filter:
-                        context.DrawEllipse(pen.Brush, null, center, 7, 7);
+                        context.DrawEllipse(pen.Brush, null, center, 7 + hoverBold, 7 + hoverBold);
                         context.DrawLine(dotFillPen, new Point(center.X, center.Y - 5), new Point(center.X, center.Y + 5));
                         context.DrawLine(dotFillPen, new Point(center.X - 4, center.Y - 3), new Point(center.X + 4, center.Y + 3));
                         context.DrawLine(dotFillPen, new Point(center.X + 4, center.Y - 3), new Point(center.X - 4, center.Y + 3));
                         break;
                     default:
-                        context.DrawEllipse(dotFill, pen, center, 3, 3);
+                        context.DrawEllipse(dotFill, pen, center, 3 + hoverBold, 3 + hoverBold);
                         break;
                 }
             }