[pengfeixx]

Summary

Qt6 打印引擎使用打印机原生分辨率（setResolution() 已废弃无效），而 pageRect(QPrinter::Point) 返回磅（1/72 英寸）单位，与代码中按设备像素计算的页边距、字号、setPageSize 不一致，导致打印及打印预览排版错乱：文字过大、每行字符极少、总页数异常、页码框宽度为负不显示。

Changes

• src/widgets/window.cpp 三处打印路径（doPrint / doPrintWithLargeDoc / asynPrint）将 pageRect(QPrinter::Point) 改为 pageRect(QPrinter::DevicePixel)，恢复 Qt5 无参 pageRect() 的设备像素语义，与 painter 坐标系及边距/字号计算单位保持一致。

Testing

• Qt 6.8（gcc 13）完整构建通过，window.cpp 编译无警告
• 打印预览（Ctrl+P）检查 2cm 页边距与字号正常
• 导出 PDF（A4）检查总页数与右下角页码
• 大文件（>1MB）大文档打印路径翻页预览排版稳定

PMS: BUG-380145

Summary by Sourcery

Bug Fixes:

• Correct Qt6 print and print-preview layout calculations by using device-pixel page rectangles across all printing paths.

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Updates all Qt6 printing paths to use device-pixel page rectangles, matching the units used for margins, font sizing, page sizing, and painter coordinates; this fixes layout scaling and pagination issues while retaining Qt5 behavior.

Flow diagram for Qt6 print layout coordinate alignment

flowchart LR
    P[QPrinter] --> R[pageRect DevicePixel]
    R --> L[Page layout and margins]
    L --> Q[QPainter coordinates]
    Q --> O[Correct print and preview pagination]

Loading

File-Level Changes

Change	Details	Files
Align Qt6 print page geometry with the painter’s device-pixel coordinate system.	Replace Qt6 point-based page rectangle queries with DevicePixel queries. Apply the unit correction consistently across normal, large-document, and asynchronous print paths. Preserve the Qt5 compatibility branch using the legacy no-argument pageRect() API.	src/widgets/window.cpp

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[sourcery-ai]

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[deepin-ci-robot]

deepin pr auto review

🤖 AI 代码审查报告

总体评分： 100 分 (通过阈值: 70分)

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📊 总体评价

项目	结果
审查结论	代码审查通过
评分详情	本次变更在 Qt6 下将打印页面矩形的单位从 QPrinter::Point 改为 QPrinter::DevicePixel，修复了打印页面矩形计算问题。变更最小化且精准，三处函数修改模式一致，语法正确、逻辑清晰，无安全漏洞，无性能影响。

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🔍 详细分析

1. 语法逻辑 ✅

评价： 语法正确，逻辑清晰 ✅ 通过

潜在问题：
✅ 未发现明显问题

建议： []

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2. 代码质量 ✅

评价： 代码结构清晰，注释完整 ✅ 通过

潜在问题：
✅ 未发现明显问题

建议： []

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3. 代码性能 ✅

评价： 性能良好，资源使用合理 ✅ 通过

潜在问题：
✅ 未发现明显问题

建议： []

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4. 代码安全 🔒

评价： 存在0个安全漏洞 ✅ 通过

🔐 发现 0 个安全漏洞

安全漏洞详情：
✅ 未发现安全漏洞

建议： []

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💡 改进建议代码示例

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本报告由 AI 代码审查工具自动生成

[deepin-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: lzwind, pengfeixx

The full list of commands accepted by this bot can be found here.

Details

Needs approval from an approver in each of these files:

• debian/deepin/OWNERS

Approvers can indicate their approval by writing /approve in a comment
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[pengfeixx]

/merge