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Day4 教学示例补三个：QDialog 综合 / QLineEdit 小眼睛 / 文件 IO（+顶层构建注册）

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- qdialog_showcase：wiki「6 对话框 QDialog」6.2–6.5 综合演示。含两套实现：
  · Designer 表单版（dialog.{h,cpp,ui} + resources.qrc + source.gif，QMovie 播 GIF）
  · 纯代码版（qt_dialog_showcase.cpp，单文件，QWidget 布满按钮逐个演示 QDialog 行为）
- lineedit_eye_toggle：子类化 QLineEdit，paintEvent 自绘小眼睛、mouseEvent 命中切换
  echoMode，并与内置 clear button 动态避让（读 objectName=="clearButton" 子 widget 几何）。
  含独立子目录 CMakeLists.txt 供单独打开（顶层 add_subdirectory 不递归）。
- file_io_demo：QFile/QTextStream/QDataStream/QFileInfo/QDir/QTextCodec/QJson 五主题
  综合示例，每个按钮产出一个文件落到 demo_output/ 便于课堂手动查看。

构建注册：examples/CMakeLists.txt 用 add_teaching_example 注册前两个纯代码示例，
mandelbrot 多源文件单独 add_executable；calculator_mainwindow_qss 加 themes.qrc 与
AUTORCC；all_teaching_examples 依赖列表同步补齐。

附 lineedit_eye_toggle 设计文档（docs/superpowers/specs）。

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
张宗平
2026-07-09 16:51:09 +08:00
parent 993aa30a1c
commit 01b264fe97
16 changed files with 1694 additions and 3 deletions
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docs/teaching/examples/qdialog_showcase/dialog.ui
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<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
<class>Dialog</class>
<widget class="QDialog" name="Dialog">
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>640</width>
<height>480</height>
</rect>
</property>
<property name="windowTitle">
<string>Dialog</string>
</property>
<widget class="QDialogButtonBox" name="buttonBox">
<property name="geometry">
<rect>
<x>10</x>
<y>440</y>
<width>621</width>
<height>32</height>
</rect>
</property>
<property name="orientation">
<enum>Qt::Horizontal</enum>
</property>
<property name="standardButtons">
<set>QDialogButtonBox::Cancel|QDialogButtonBox::Ok</set>
</property>
</widget>
<widget class="QLabel" name="label2">
<property name="geometry">
<rect>
<x>120</x>
<y>70</y>
<width>100</width>
<height>100</height>
</rect>
</property>
<property name="minimumSize">
<size>
<width>100</width>
<height>100</height>
</size>
</property>
<property name="frameShape">
<enum>QFrame::NoFrame</enum>
</property>
<property name="text">
<string/>
</property>
<property name="pixmap">
<pixmap resource="resources.qrc">:/source.gif</pixmap>
</property>
<property name="scaledContents">
<bool>true</bool>
</property>
</widget>
<widget class="QLabel" name="label">
<property name="geometry">
<rect>
<x>140</x>
<y>190</y>
<width>200</width>
<height>241</height>
</rect>
</property>
<property name="minimumSize">
<size>
<width>200</width>
<height>200</height>
</size>
</property>
<property name="text">
<string>MarioGif</string>
</property>
<property name="textFormat">
<enum>Qt::PlainText</enum>
</property>
<property name="scaledContents">
<bool>true</bool>
</property>
</widget>
</widget>
<resources>
<include location="resources.qrc"/>
</resources>
<connections>
<connection>
<sender>buttonBox</sender>
<signal>accepted()</signal>
<receiver>Dialog</receiver>
<slot>accept()</slot>
<hints>
<hint type="sourcelabel">
<x>248</x>
<y>254</y>
</hint>
<hint type="destinationlabel">
<x>157</x>
<y>274</y>
</hint>
</hints>
</connection>
<connection>
<sender>buttonBox</sender>
<signal>rejected()</signal>
<receiver>Dialog</receiver>
<slot>reject()</slot>
<hints>
<hint type="sourcelabel">
<x>316</x>
<y>260</y>
</hint>
<hint type="destinationlabel">
<x>286</x>
<y>274</y>
</hint>
</hints>
</connection>
</connections>
</ui>