From 7ae58e98e6f019426b1fb475ca723b13ff8d4394 Mon Sep 17 00:00:00 2001
From: hailin <hailin.zhao@gdzx.xyz>
Date: Mon, 19 Jan 2026 21:30:41 -0800
Subject: [PATCH] =?UTF-8?q?debug:=20=E6=B7=BB=E5=8A=A0=E5=B9=B3=E7=A7=BB?=
 =?UTF-8?q?=E8=B0=83=E8=AF=95=E4=BF=A1=E6=81=AF?=
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---
 .../presentation/widgets/kline_chart/kline_chart_widget.dart | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/frontend/mining-app/lib/presentation/widgets/kline_chart/kline_chart_widget.dart b/frontend/mining-app/lib/presentation/widgets/kline_chart/kline_chart_widget.dart
index 3c2150cb..ad7d0568 100644
--- a/frontend/mining-app/lib/presentation/widgets/kline_chart/kline_chart_widget.dart
+++ b/frontend/mining-app/lib/presentation/widgets/kline_chart/kline_chart_widget.dart
@@ -537,12 +537,17 @@ class _KlineChartWidgetState extends State<KlineChartWidget> {
         _userHasPanned = true;  // 缩放后也标记为已操作
       } else if (_startFocalPoint != null) {
         // 单指平移
+        // dx > 0 向右滑（看更早历史），dx < 0 向左滑（看更新数据）
         final dx = details.focalPoint.dx - _startFocalPoint!.dx;
         // 最大滚动位置：让最新K线在屏幕中心
         final int halfScreenCount = (_chartWidth / 2 / _candleWidth).ceil();
         final double maxScroll = math.max(0.0, (widget.klines.length - halfScreenCount) * _candleWidth);
+        // 向右滑 dx>0，scrollX 减小，显示更早的数据
         _scrollX = (_startScrollX - dx).clamp(0.0, maxScroll);
         _userHasPanned = true;
+
+        // DEBUG: 打印滚动信息
+        debugPrint('Pan: dx=$dx, scrollX=$_scrollX, maxScroll=$maxScroll, startIndex=${(_scrollX / _candleWidth).floor()}');
       }
     });
   }