fix:issue #217

Ink Canvas/MainWindow_cs/MW_FloatingBarIcons.cs

@@ -1866,13 +1866,9 @@ namespace Ink_Canvas
             if (sender == Cursor_Icon && lastBorderMouseDownObject != Cursor_Icon) return;
 
             // 禁用高级橡皮擦系统
-                DisableEraserOverlay();
+            DisableEraserOverlay();
-
-            // 使用集中化的工具模式切换方法，确保快捷键状态正确更新
-            // 鼠标模式下应该禁用快捷键以放行键盘操作
             SetCurrentToolMode(InkCanvasEditingMode.None);
 
-            // 更新模式缓存，确保后续的模式检测正确
             UpdateCurrentToolMode("cursor");
 
             SetFloatingBarHighlightPosition("cursor");
@@ -2312,7 +2308,7 @@ namespace Ink_Canvas
             if (sender == EraserByStrokes_Icon && lastBorderMouseDownObject != EraserByStrokes_Icon) return;
 
             // 禁用高级橡皮擦系统
-                DisableEraserOverlay();
+            DisableEraserOverlay();
 
             forceEraser = true;
             forcePointEraser = false;

Ink Canvas/MainWindow_cs/MW_ShapeDrawing.cs

@@ -491,25 +491,15 @@ namespace Ink_Canvas
 
             if (drawingShapeMode != 0)
             {
-                // 确保几何绘制模式下不切换到Ink模式，避免触摸轨迹被收集
                 inkCanvas.EditingMode = InkCanvasEditingMode.None;
 
                 if (!isTouchDown) return;
 
                 if (isWaitUntilNextTouchDown && dec.Count > 1) return;
-                if (dec.Count > 1)
-                {
-                    if ((drawingShapeMode == 24 || drawingShapeMode == 25) && drawMultiStepShapeCurrentStep == 1)
-                    {
-                        // 第二笔绘制双曲线时，只删除第二笔的临时笔画，保留第一笔的辅助线
-                        try
-                        {
-                            inkCanvas.Strokes.Remove(lastTempStroke);
-                        }
-                        catch { }
-                        return;
-                    }
                 
+                // 对于多笔图形绘制，允许第二笔绘制，即使dec.Count > 1
+                if (dec.Count > 1 && !((drawingShapeMode == 24 || drawingShapeMode == 25) && drawMultiStepShapeCurrentStep == 1))
+                {
                     // 其他情况正常删除临时笔画
                     try
                     {
@@ -523,6 +513,17 @@ namespace Ink_Canvas
                     return;
                 }
                 
+                // 第二笔绘制双曲线时，只删除第二笔的临时笔画，保留第一笔的辅助线
+                if ((drawingShapeMode == 24 || drawingShapeMode == 25) && drawMultiStepShapeCurrentStep == 1)
+                {
+                    try
+                    {
+                        inkCanvas.Strokes.Remove(lastTempStroke);
+                    }
+                    catch { }
+                    // 不直接返回，继续执行绘制逻辑
+                }
+
                 Point touchPoint = e.GetTouchPoint(inkCanvas).Position;
                 if ((drawingShapeMode == 24 || drawingShapeMode == 25) && drawMultiStepShapeCurrentStep == 1)
                 {

Ink Canvas/MainWindow_cs/MW_TouchEvents.cs

@@ -245,7 +245,6 @@ namespace Ink_Canvas
 
             if (drawingShapeMode != 0)
             {
-                // 确保几何绘制模式下不切换到Ink模式，避免触摸轨迹被收集
                 inkCanvas.EditingMode = InkCanvasEditingMode.None;
                 
                 isTouchDown = true;
@@ -538,7 +537,6 @@ namespace Ink_Canvas
             }
             if (drawingShapeMode != 0)
             {
-                // 确保几何绘制模式下不切换到Ink模式，避免触摸轨迹被收集
                 inkCanvas.EditingMode = InkCanvasEditingMode.None;
                 
                 // 设置触摸状态，类似鼠标事件处理
@@ -601,14 +599,14 @@ namespace Ink_Canvas
             }
             if (drawingShapeMode != 0)
             {
-                // 确保几何绘制模式下不切换到Ink模式，避免触摸轨迹收集
                 inkCanvas.EditingMode = InkCanvasEditingMode.None;
-                // 几何绘制模式下不记录触摸点，避免触摸轨迹被收集
                 SetCursorBasedOnEditingMode(inkCanvas);
                 inkCanvas.CaptureTouch(e.TouchDevice);
                 ViewboxFloatingBar.IsHitTestVisible = false;
                 BlackboardUIGridForInkReplay.IsHitTestVisible = false;
                 
+                isTouchDown = true;
+
                 if (dec.Count == 0)
                 {
                     var inkTouchPoint = e.GetTouchPoint(inkCanvas);