From 0334bcf9a61d43e183c72b57a856368bfb94d8fc Mon Sep 17 00:00:00 2001
From: gongheng <gongheng@uniontech.com>
Date: Fri, 30 Oct 2026 04:39:29 +0800
Subject: [PATCH] fix: resolve content area spacing and alignment issues
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1. Root cause: layout chain sets zero margins (setContentsMargins(0,0,0,0))
   at CentralDocPage, leaving no gap between titlebar and content area;
   SheetBrowser lacks explicit alignment, causing horizontal asymmetry
2. Fix: set top margin to 10px in CentralDocPage layout and add
   setAlignment(Qt::AlignHCenter | Qt::AlignTop) in SheetBrowser
3. Impact: only UI layout parameters changed, no function signatures or
   core rendering logic affected

Log: fix content area zero vertical gap with titlebar and horizontal misalignment

Influence:
1. Test PDF opening with different page sizes for correct spacing and centering
2. Test window resize to verify alignment persists
3. Test multi-page navigation to ensure layout consistency

fix: 修复内容区间距缺失和水平未居中问题

1. 根因：布局链中 CentralDocPage 设置零边距(setContentsMargins(0,0,0,0))，
   标题栏与内容区之间无垂直间距；SheetBrowser 未设置对齐方式，内容区
   在视口中水平未居中
2. 方案：CentralDocPage 布局上边距设为 10px，SheetBrowser 构造函数中
   添加 setAlignment(Qt::AlignHCenter | Qt::AlignTop) 确保水平居中
3. 影响：仅修改 UI 布局参数，不涉及函数签名或核心渲染逻辑

Log: 修复内容区与标题栏零间距及水平未居中问题

Influence:
1. 测试不同页面尺寸的 PDF 打开后的间距和居中效果
2. 测试窗口缩放后对齐是否保持
3. 测试多页翻页后布局一致性

PMS: BUG-193233
---
 reader/browser/SheetBrowser.cpp   | 1 +
 reader/uiframe/CentralDocPage.cpp | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/reader/browser/SheetBrowser.cpp b/reader/browser/SheetBrowser.cpp
index 3677d4f3..020b7a80 100644
--- a/reader/browser/SheetBrowser.cpp
+++ b/reader/browser/SheetBrowser.cpp
@@ -62,6 +62,7 @@ SheetBrowser::SheetBrowser(DocSheet *parent) : DGraphicsView(parent), m_sheet(pa
     // qCDebug(appLog) << "Graphics scene created";
 
     setFrameShape(QFrame::NoFrame);
+    setAlignment(Qt::AlignHCenter | Qt::AlignTop);
 
     scene()->setItemIndexMethod(QGraphicsScene::NoIndex);  // 禁用场景索引（对于静态场景更高效）
 
diff --git a/reader/uiframe/CentralDocPage.cpp b/reader/uiframe/CentralDocPage.cpp
index 94dc67f6..bbb4c6b6 100644
--- a/reader/uiframe/CentralDocPage.cpp
+++ b/reader/uiframe/CentralDocPage.cpp
@@ -107,7 +107,7 @@ CentralDocPage::CentralDocPage(DWidget *parent)
 
     m_mainLayout->addWidget(m_tabBar);
     m_mainLayout->addItem(m_stackedLayout);
-    m_mainLayout->setContentsMargins(0, 0, 0, 0);
+    m_mainLayout->setContentsMargins(0, 10, 0, 0);
     m_mainLayout->setSpacing(0);
 
     this->setLayout(m_mainLayout);