张宗平
13b3ebbe14
把川大 wiki「02.Qt方向」课程代码整理为 CMake 管理的可编译运行项目。
Part1 C/C++ 强化 (p01/, 144 目标, host gcc/g++ 构建, 全绿):
- 修复全部编译失败：补 <cstring>/<fstream>/<iomanip>/<vector> 等缺失头
(common_fix + infer_stl_includes 自动检测注入)、修正 pause() 壳注入
(改检测已转换后的 pause 调用)、namespace 提升出函数体、const 成员函数
正确性、dedupe 不再破坏函数重载集、K&R 隐式 int / 动态异常规范等
C++17 移除特性的可编译等价改写。
- 目录采用深缩写 p01/ch04/s03/ (原 part1_cpp/ch04_class_object/03_ctor_dtor)。
Part3 Qt 桌面 (p03/, 29 目标, 隔离 Qt 5.14.2 构建, 全绿):
- gen_part3.py: Qt 外壳模板 (main+QApplication+show, QTimer 自动退出便于
offscreen 验证)、AUTOMOC + .moc include、rewrite_* 处理散文混入/重载/
资源依赖、生成占位 png/gif + .qrc + rundata 样例数据。
- 修正 QLable 笔误、全角分号、.→->、Windows 路径、QApplication 阻塞事件
循环改为 QCoreApplication 等。
任务1 概念/版本验证:
- tools/std_probe.py: 跨 -std= 编译探针 (--pedantic-errors 让已废除特性硬失败)。
- tools/demo_versions/: K&R 隐式 int、三目左值、void* 转换、enum 赋整、
const 经指针、动态异常规范 共 6 个跨版本演示。
- docs/VERSION_NOTES.md: 每条「原文说法→C17/C++17 是否成立→何版本成立→已验证」。
文档: 顶层 README、docs/SOURCE_PAGES.md (页面→目录映射)、
docs/ERRATA.md (Part1 修正)、docs/ERRATA_part3.md (Part3 修正)。
另修复 tools/run.sh / run_qt.sh 的 ${1:?...} 引号语法 bug。
隔离 Qt 验证: ldd 0 系统 Qt 引用; 173/173 目标全绿; p03 offscreen 运行通过。
143 lines
4.2 KiB
Markdown
143 lines
4.2 KiB
Markdown
# p03/ch06 — Qt 示例
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## 可运行示例
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| 目标 | 源文件 | 说明 |
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|---|---|---|
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| `modal_dialog` | `modal_dialog.cpp` | 构建运行见顶层 README；离屏验证 `QT_QPA_PLATFORM=offscreen tools/run_qt.sh modal_dialog` |
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| `modeless_dialog_stack` | `modeless_dialog_stack.cpp` | 构建运行见顶层 README；离屏验证 `QT_QPA_PLATFORM=offscreen tools/run_qt.sh modeless_dialog_stack` |
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| `modeless_dialog_heap` | `modeless_dialog_heap.cpp` | 构建运行见顶层 README；离屏验证 `QT_QPA_PLATFORM=offscreen tools/run_qt.sh modeless_dialog_heap` |
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| `modeless_dialog_deleteonclose` | `modeless_dialog_deleteonclose.cpp` | 构建运行见顶层 README；离屏验证 `QT_QPA_PLATFORM=offscreen tools/run_qt.sh modeless_dialog_deleteonclose` |
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| `message_box_question` | `message_box_question.cpp` | 构建运行见顶层 README；离屏验证 `QT_QPA_PLATFORM=offscreen tools/run_qt.sh message_box_question` |
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| `message_box_custom` | `message_box_custom.cpp` | 构建运行见顶层 README；离屏验证 `QT_QPA_PLATFORM=offscreen tools/run_qt.sh message_box_custom` |
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| `file_dialog` | `file_dialog.cpp` | 构建运行见顶层 README；离屏验证 `QT_QPA_PLATFORM=offscreen tools/run_qt.sh file_dialog` |
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## 参考片段（签名/伪代码，未单独建目标）
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### [block 4] .4 消息对话框
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```cpp
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void about(QWidget * parent, const QString & title, const QString & text)
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```
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### [block 5] .4 消息对话框
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```cpp
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void aboutQt(QWidget * parent, const QString & title = QString())：
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```
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### [block 6] .4 消息对话框
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```cpp
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StandardButton critical(QWidget * parent,
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const QString & title,
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const QString & text,
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StandardButtons buttons = Ok,
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StandardButton defaultButton = NoButton)：
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```
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### [block 7] .4 消息对话框
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```cpp
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StandardButton information(QWidget * parent,
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const QString & title,
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const QString & text,
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StandardButtons buttons = Ok,
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StandardButton defaultButton = NoButton)
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```
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### [block 8] .4 消息对话框
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```cpp
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StandardButton question(QWidget * parent,
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const QString & title,
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const QString & text,
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StandardButtons buttons = StandardButtons( Yes | No ),
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StandardButton defaultButton = NoButton)
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```
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### [block 9] .4 消息对话框
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```cpp
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StandardButton warning(QWidget * parent,
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const QString & title,
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const QString & text,
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StandardButtons buttons = Ok,
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StandardButton defaultButton = NoButton)
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```
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### [block 13] 6.5 标准文件对话框
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```cpp
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connect(openAction, &QAction::triggered,
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this, &MainWindow::openFile);
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connect(saveAction, &QAction::triggered,
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this, &MainWindow::saveFile);
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```
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### [block 14] 6.5 标准文件对话框
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```cpp
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//打开文件
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void MainWindow::openFile()
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{
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QString path = QFileDialog::getOpenFileName(this,
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tr("Open File"), ".", tr("Text Files(*.txt)"));
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if(!path.isEmpty())
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{
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QFile file(path);
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if (!file.open(QIODevice::ReadOnly | QIODevice::Text))
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{
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QMessageBox::warning(this, tr("Read File"),
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tr("Cannot open file:\n%1").arg(path));
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return;
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}
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QTextStream in(&file);
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textEdit->setText(in.readAll());
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file.close();
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}
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else
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{
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QMessageBox::warning(this, tr("Path"),
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tr("You did not select any file."));
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}
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}
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//保存文件
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void MainWindow::saveFile()
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{
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QString path = QFileDialog::getSaveFileName(this,
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tr("Open File"), ".", tr("Text Files(*.txt)"));
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if(!path.isEmpty())
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{
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QFile file(path);
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if (!file.open(QIODevice::WriteOnly | QIODevice::Text))
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{
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QMessageBox::warning(this, tr("Write File"),
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tr("Cannot open file:\n%1").arg(path));
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return;
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}
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QTextStream out(&file);
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out << textEdit->toPlainText();
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file.close();
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}
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else
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{
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QMessageBox::warning(this, tr("Path"),
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tr("You did not select any file."));
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}
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}
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```
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### [block 15] 6.5 标准文件对话框
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```cpp
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QString getOpenFileName(QWidget * parent = 0,
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const QString & caption = QString(),
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const QString & dir = QString(),
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const QString & filter = QString(),
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QString * selectedFilter = 0,
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Options options = 0)
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```
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