From eb1bdc95dc7ef281d12f44991ea928ca0a6a70a0 Mon Sep 17 00:00:00 2001
From: iorebuild <iorebuild@linuxacme.com>
Date: Thu, 30 Apr 2026 13:26:50 +0800
Subject: [PATCH] =?UTF-8?q?refactor:=20=E9=80=9A=E9=81=93=E9=BB=98?=
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- 所有16个通道复选框默认不勾选
- CSV文件直接写原始数据，不加ch0-ch15表头
- 修复autoRangeY在无可见通道时的逻辑
---
 datamanager.cpp | 10 ----------
 plotwidget.cpp  |  6 +++++-
 2 files changed, 5 insertions(+), 11 deletions(-)

diff --git a/datamanager.cpp b/datamanager.cpp
index e759e73..65dddb5 100644
--- a/datamanager.cpp
+++ b/datamanager.cpp
@@ -67,16 +67,6 @@ void DataManager::appendDataPoint(const QVector<int> &values)
 {
     if (!m_recording) return;
 
-    if (!m_headerWritten) {
-        // 写入表头
-        QStringList headers;
-        for (int i = 0; i < 16; ++i) {
-            headers << QString("ch%1").arg(i);
-        }
-        m_stream << headers.join(",") << "\n";
-        m_headerWritten = true;
-    }
-
     QStringList parts;
     for (int v : values) {
         parts << QString::number(v);
diff --git a/plotwidget.cpp b/plotwidget.cpp
index adfb241..af3adaa 100644
--- a/plotwidget.cpp
+++ b/plotwidget.cpp
@@ -26,7 +26,7 @@ PlotWidget::PlotWidget(QWidget *parent)
     , m_dirty(true)
 {
     m_data.resize(16);
-    m_channelVisible.fill(true, 16);
+    m_channelVisible.fill(false, 16);
     m_colors = defaultColors();
 
     setMouseTracking(true);
@@ -149,6 +149,10 @@ void PlotWidget::autoRangeY()
         }
     }
 
+    if (globalMax < globalMin) {
+        // 没有可见通道或没有数据
+        return;
+    }
     if (globalMax - globalMin < 1.0) {
         globalMin -= 50;
         globalMax += 50;