初始化：图形化界面骨架（文件选择、语法高亮、自动缩进、查找/替换）

mainwindow.cpp

@@ -0,0 +1,175 @@
+#include "mainwindow.h"
+
+#include <QMenuBar>
+#include <QMenu>
+#include <QAction>
+#include <QSplitter>
+#include <QMessageBox>
+#include <QFileDialog>
+
+#include "ui/filebrowserwidget.h"
+#include "ui/codeeditorwidget.h"
+#include "backend/compileprocessmanager.h"
+
+MainWindow::MainWindow(QWidget *parent)
+    : QMainWindow(parent)
+{
+    createActions();
+    createMenus();
+    setupCentralWidgets();
+
+    m_compileManager = new CompileProcessManager(this);
+
+    connectSignals();
+
+    setWindowTitle(tr("My Compiler IDE"));
+    resize(1200, 800);
+}
+
+MainWindow::~MainWindow()
+{
+}
+
+void MainWindow::createActions()
+{
+    // File
+    m_actNew  = new QAction(tr("&New"), this);
+    m_actOpen = new QAction(tr("&Open..."), this);
+    m_actSave = new QAction(tr("&Save"), this);
+    m_actExit = new QAction(tr("E&xit"), this);
+
+    // Build / Run
+    m_actBuild = new QAction(tr("&Build"), this);
+    m_actRun   = new QAction(tr("&Run"), this);
+
+    // 可以设置快捷键
+    m_actNew->setShortcut(QKeySequence::New);
+    m_actOpen->setShortcut(QKeySequence::Open);
+    m_actSave->setShortcut(QKeySequence::Save);
+    m_actExit->setShortcut(QKeySequence::Quit);
+
+    m_actBuild->setShortcut(Qt::Key_F5);
+    m_actRun->setShortcut(Qt::Key_F6);
+}
+
+void MainWindow::createMenus()
+{
+    // File 菜单
+    QMenu *fileMenu = menuBar()->addMenu(tr("&File"));
+    fileMenu->addAction(m_actNew);
+    fileMenu->addAction(m_actOpen);
+    fileMenu->addAction(m_actSave);
+    fileMenu->addSeparator();
+    fileMenu->addAction(m_actExit);
+
+    // Edit 菜单（先占位，之后可以加撤销/重做/查找等）
+    QMenu *editMenu = menuBar()->addMenu(tr("&Edit"));
+    Q_UNUSED(editMenu);
+
+    // Build 菜单
+    QMenu *buildMenu = menuBar()->addMenu(tr("&Build"));
+    buildMenu->addAction(m_actBuild);
+    buildMenu->addAction(m_actRun);
+
+    // Help 菜单（占位）
+    QMenu *helpMenu = menuBar()->addMenu(tr("&Help"));
+    Q_UNUSED(helpMenu);
+}
+
+void MainWindow::setupCentralWidgets()
+{
+    // 左右分割：左文件列表、右代码编辑区
+    QSplitter *splitter = new QSplitter(Qt::Horizontal, this);
+
+    m_fileBrowser = new FileBrowserWidget(splitter);
+    m_codeEditor  = new CodeEditorWidget(splitter);
+
+    splitter->setStretchFactor(0, 1); // 文件列表
+    splitter->setStretchFactor(1, 3); // 代码编辑
+
+    setCentralWidget(splitter);
+}
+
+void MainWindow::connectSignals()
+{
+    // 菜单动作
+    connect(m_actNew,  &QAction::triggered, this, &MainWindow::onActionNewFile);
+    connect(m_actOpen, &QAction::triggered, this, &MainWindow::onActionOpenFile);
+    connect(m_actSave, &QAction::triggered, this, &MainWindow::onActionSaveFile);
+    connect(m_actExit, &QAction::triggered, this, &MainWindow::onActionExit);
+
+    connect(m_actBuild, &QAction::triggered, this, &MainWindow::onActionBuild);
+    connect(m_actRun,   &QAction::triggered, this, &MainWindow::onActionRun);
+
+    // 编译完成信号
+    connect(m_compileManager, &CompileProcessManager::compileFinished,
+            this, &MainWindow::onCompileFinished);
+
+    // 文件列表点击打开文件（后面可以在 FileBrowserWidget 里发信号）
+    connect(m_fileBrowser, &FileBrowserWidget::fileOpenRequested,
+            m_codeEditor,  &CodeEditorWidget::loadFromFile);
+}
+
+// ========== 菜单槽函数（先简单占位） ==========
+
+void MainWindow::onActionNewFile()
+{
+    m_codeEditor->clearEditor();
+}
+
+void MainWindow::onActionOpenFile()
+{
+    QString filePath = QFileDialog::getOpenFileName(this, tr("Open File"));
+    if (filePath.isEmpty())
+        return;
+
+    m_codeEditor->loadFromFile(filePath);
+}
+
+void MainWindow::onActionSaveFile()
+{
+    // 简单实现：如果 CodeEditor 里自己记录了当前文件路径，就直接保存
+    // 否则先弹出另存为。这里先调用一个占位接口，具体实现之后我们再做。
+    if (!m_codeEditor->save())
+    {
+        QString filePath = QFileDialog::getSaveFileName(this, tr("Save File"));
+        if (!filePath.isEmpty())
+        {
+            m_codeEditor->saveAs(filePath);
+        }
+    }
+}
+
+void MainWindow::onActionExit()
+{
+    close();
+}
+
+void MainWindow::onActionBuild()
+{
+    // 获取当前编辑器中的代码文本
+    QString code = m_codeEditor->currentText();
+
+    // TODO: 这里可以根据 code / 当前选中的编译选项，生成指令、参数等
+    // 目前先简单把 code 直接发给后端，后面你告诉我后端协议，我们再细化
+    m_compileManager->runCompile(code);
+}
+
+void MainWindow::onActionRun()
+{
+    // TODO: 之后可以根据编译结果调用可执行文件运行，或者编译+运行
+    QMessageBox::information(this, tr("Run"), tr("Run action triggered (TODO)."));
+}
+
+void MainWindow::onCompileFinished(const QString &stdoutText,
+                                   const QString &stderrText,
+                                   int exitCode)
+{
+    // 这里先简单弹个窗口，后面我们可以加“底部控制台”面板输出
+    QString msg = tr("Exit code: %1\n\nSTDOUT:\n%2\n\nSTDERR:\n%3")
+                      .arg(exitCode)
+                      .arg(stdoutText)
+                      .arg(stderrText);
+
+    QMessageBox::information(this, tr("Build Result"), msg);
+}