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）

CMakeLists.txt

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+cmake_minimum_required(VERSION 4.0)
+project(Compiler_GUI)
+
+set(CMAKE_CXX_STANDARD 20)
+set(CMAKE_AUTOMOC ON)
+set(CMAKE_AUTORCC ON)
+set(CMAKE_AUTOUIC ON)
+
+set(CMAKE_PREFIX_PATH "/opt/homebrew/Cellar/qt/6.9.3")
+
+find_package(Qt6 COMPONENTS
+        Core
+        Gui
+        Widgets
+        REQUIRED)
+
+add_executable(Compiler_GUI main.cpp
+        mainwindow.cpp
+        mainwindow.h
+        ui/filebrowserwidget.cpp
+        ui/filebrowserwidget.h
+        ui/codeeditorwidget.cpp
+        ui/codeeditorwidget.h
+        backend/compileprocessmanager.cpp
+        backend/compileprocessmanager.h)
+target_link_libraries(Compiler_GUI
+        Qt::Core
+        Qt::Gui
+        Qt::Widgets
+)
+

backend/compileprocessmanager.cpp

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+#include "compileprocessmanager.h"
+
+#include <QProcess>
+
+CompileProcessManager::CompileProcessManager(QObject *parent)
+    : QObject(parent)
+{
+    m_process = new QProcess(this);
+    connect(m_process, &QProcess::finished,
+            this, &CompileProcessManager::onProcessFinished);
+}
+
+void CompileProcessManager::runCompile(const QString &sourceCode)
+{
+    if (m_process->state() != QProcess::NotRunning) {
+        // 简单处理：如果已经在运行，就先杀掉，或直接返回
+        m_process->kill();
+        m_process->waitForFinished();
+    }
+
+    // TODO: 这里根据你的编译器协议生成指令和参数
+    // 假设你已存在一个后端可执行文件 "my_compiler_backend"
+    QString program = "my_compiler_backend";
+
+    QStringList args = buildArguments(sourceCode);
+
+    m_process->setProgram(program);
+    m_process->setArguments(args);
+    m_process->start();
+}
+
+QStringList CompileProcessManager::buildArguments(const QString &sourceCode)
+{
+    QStringList args;
+
+    // TODO: 把 sourceCode 写入临时文件 / 管道 / 特定协议
+    // 这里只是示例：假设后端接受一个 -code "xxx" 的参数
+    args << "-code" << sourceCode;
+
+    return args;
+}
+
+void CompileProcessManager::onProcessFinished(int exitCode, QProcess::ExitStatus status)
+{
+    Q_UNUSED(status);
+
+    QString stdoutText = QString::fromLocal8Bit(m_process->readAllStandardOutput());
+    QString stderrText = QString::fromLocal8Bit(m_process->readAllStandardError());
+
+    emit compileFinished(stdoutText, stderrText, exitCode);
+}

backend/compileprocessmanager.h

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+#pragma once
+
+#include <QObject>
+#include <QProcess>   // ✅ 关键：要完整引入 QProcess
+
+class CompileProcessManager : public QObject
+{
+    Q_OBJECT
+public:
+    explicit CompileProcessManager(QObject *parent = nullptr);
+
+    // 目前简单接受代码字符串，后面可以加更多参数
+    void runCompile(const QString &sourceCode);
+
+    signals:
+        void compileFinished(const QString &stdoutText,
+                             const QString &stderrText,
+                             int exitCode);
+
+private slots:
+    void onProcessFinished(int exitCode, QProcess::ExitStatus status);
+
+private:
+    QProcess *m_process = nullptr;
+
+    QStringList buildArguments(const QString &sourceCode);
+};

main.cpp

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+#include <QApplication>
+#include "mainwindow.h"
+
+int main(int argc, char *argv[])
+{
+    QApplication a(argc, argv);
+
+    MainWindow w;
+    w.show();
+
+    return a.exec();
+}

mainwindow.cpp

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+#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);
+}

mainwindow.h

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+#pragma once
+
+#include <QMainWindow>
+
+class FileBrowserWidget;
+class CodeEditorWidget;
+class CompileProcessManager;
+
+class MainWindow : public QMainWindow
+{
+    Q_OBJECT
+
+public:
+    explicit MainWindow(QWidget *parent = nullptr);
+    ~MainWindow();
+
+private slots:
+    void onActionNewFile();
+    void onActionOpenFile();
+    void onActionSaveFile();
+    void onActionExit();
+
+    void onActionBuild();
+    void onActionRun();
+
+    // 后端编译结果回调
+    void onCompileFinished(const QString &stdoutText,
+                           const QString &stderrText,
+                           int exitCode);
+
+private:
+    void createActions();
+    void createMenus();
+    void setupCentralWidgets();
+    void connectSignals();
+
+private:
+    // UI 部件
+    FileBrowserWidget     *m_fileBrowser = nullptr;
+    CodeEditorWidget      *m_codeEditor  = nullptr;
+
+    // 后端模块
+    CompileProcessManager *m_compileManager = nullptr;
+
+    // 菜单动作
+    QAction *m_actNew   = nullptr;
+    QAction *m_actOpen  = nullptr;
+    QAction *m_actSave  = nullptr;
+    QAction *m_actExit  = nullptr;
+
+    QAction *m_actBuild = nullptr;
+    QAction *m_actRun   = nullptr;
+};

ui/codeeditorwidget.h

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+#pragma once
+
+#include <QWidget>
+#include <QPlainTextEdit>
+#include <QColor>
+#include <QHash>
+#include <QVector>
+#include <QSet>
+#include <QStringList>
+#include <QTextCursor>
+
+
+
+class LineNumberArea;
+class CSyntaxHighlighter;
+class CompletionPopup;
+class FindReplaceBar;
+
+// 每个字符的背景信息
+struct CharBackgroundInfo
+{
+    int   column = 0;    // 这一行中的列号（从 0 开始）
+    QColor color;
+    qreal alpha = 1.0;   // 0.0 ~ 1.0
+};
+
+// 每一行的背景信息
+struct LineBackgroundInfo
+{
+    QColor color;
+    qreal alpha = 1.0;   // 0.0 ~ 1.0
+};
+
+// 真正的代码编辑器，继承 QPlainTextEdit
+class CodeEditor : public QPlainTextEdit
+{
+    Q_OBJECT
+public:
+    explicit CodeEditor(QWidget *parent = nullptr);
+
+    int lineNumberAreaWidth() const;
+
+    // 预留接口：设置行/字符背景（带透明度）
+    void setLineBackground(int line, const QColor &color, qreal alpha = 1.0);
+    void clearLineBackground(int line);
+    void clearAllLineBackgrounds();
+
+    void setCharBackground(int line, int column, const QColor &color, qreal alpha = 1.0);
+    void clearCharBackground(int line, int column);
+    void clearAllCharBackgrounds();
+
+    // 行号区域的绘制 & 点击
+    void lineNumberAreaPaintEvent(QPaintEvent *event);
+    void lineNumberAreaMousePressEvent(QMouseEvent *event);
+
+    void searchNext(const QString &text);
+
+    signals:
+        // 断点状态变化（暂时只发信号，不做具体逻辑）
+        void breakpointToggled(int line, bool enabled);
+
+protected:
+    void resizeEvent(QResizeEvent *event) override;
+    void keyPressEvent(QKeyEvent *event) override;
+
+private slots:
+    void updateLineNumberAreaWidth(int newBlockCount);
+    void updateLineNumberArea(const QRect &rect, int dy);
+    void highlightCurrentLine();
+
+    // ✅ 新增：来自联想窗口的补全插入
+    void insertCompletion(const QString &completion);
+
+private:
+    void refreshExtraSelections();
+    void handleReturnKey(QKeyEvent *event);
+    void toggleBreakpoint(int line);
+
+    // ✅ 新增：联想相关辅助函数
+    void initCompletion();
+    void showCompletion(const QString &prefix);
+    void hideCompletion();
+    QString wordUnderCursor() const;
+    void rebuildSearchMatches();
+    void applySearchHighlights();
+
+private:
+    LineNumberArea     *m_lineNumberArea = nullptr;
+    CSyntaxHighlighter *m_highlighter    = nullptr;
+
+    QSet<int> m_breakpoints;
+
+    QHash<int, LineBackgroundInfo>           m_lineBackgrounds;
+    QHash<int, QVector<CharBackgroundInfo>>  m_charBackgrounds;
+
+    // ✅ 新增：联想窗口和候选词列表
+    CompletionPopup *m_completionPopup = nullptr;
+    QStringList      m_completionWords;
+
+    QString              m_searchText;
+    QVector<QTextCursor> m_searchMatches;
+    int                  m_currentMatchIndex = -1;
+};
+
+
+
+// 对外仍然叫 CodeEditorWidget，内部包一个 CodeEditor
+class CodeEditorWidget : public QWidget
+{
+    Q_OBJECT
+public:
+    explicit CodeEditorWidget(QWidget *parent = nullptr);
+
+    void loadFromFile(const QString &filePath);
+    bool save();
+    bool saveAs(const QString &filePath);
+
+    QString currentText() const;
+    void clearEditor();
+
+    // 代理到内部 CodeEditor 的接口（以后你可以直接拿来做可视化用）
+    void setLineBackground(int line, const QColor &color, qreal alpha = 1.0);
+    void clearLineBackground(int line);
+
+    void setCharBackground(int line, int column, const QColor &color, qreal alpha = 1.0);
+    void clearCharBackground(int line, int column);
+
+private:
+    CodeEditor *m_editor = nullptr;
+    QString     m_currentFilePath;
+    FindReplaceBar *m_findBar = nullptr;
+};

ui/filebrowserwidget.cpp

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+#include "filebrowserwidget.h"
+
+#include <QTreeView>
+#include <QVBoxLayout>
+#include <QDir>
+
+FileBrowserWidget::FileBrowserWidget(QWidget *parent)
+    : QWidget(parent)
+{
+    setupUi();
+    connectSignals();
+
+    // 默认浏览当前工作目录
+    setRootPath(QDir::currentPath());
+}
+
+void FileBrowserWidget::setupUi()
+{
+    m_model = new QFileSystemModel(this);
+    m_model->setRootPath(QString()); // 稍后在 setRootPath 里设置
+
+    m_view = new QTreeView(this);
+    m_view->setModel(m_model);
+    m_view->setHeaderHidden(true);
+    m_view->setAnimated(true);
+
+    auto *layout = new QVBoxLayout(this);
+    layout->setContentsMargins(0, 0, 0, 0);
+    layout->addWidget(m_view);
+    setLayout(layout);
+}
+
+void FileBrowserWidget::connectSignals()
+{
+    connect(m_view, &QTreeView::doubleClicked,
+            this, [this](const QModelIndex &index) {
+        if (!m_model)
+            return;
+        QString path = m_model->filePath(index);
+        if (QFileInfo(path).isFile())
+            emit fileOpenRequested(path);
+    });
+}
+
+void FileBrowserWidget::setRootPath(const QString &path)
+{
+    if (!m_model)
+        return;
+    QModelIndex idx = m_model->setRootPath(path);
+    m_view->setRootIndex(idx);
+}

ui/filebrowserwidget.h

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+#pragma once
+
+#include <QWidget>
+#include <QFileSystemModel>
+
+class QTreeView;
+
+class FileBrowserWidget : public QWidget
+{
+    Q_OBJECT
+public:
+    explicit FileBrowserWidget(QWidget *parent = nullptr);
+
+    void setRootPath(const QString &path);
+
+    signals:
+        // 当用户双击或选择某个文件时，通知 MainWindow/CodeEditor 打开
+        void fileOpenRequested(const QString &filePath);
+
+private:
+    QFileSystemModel *m_model = nullptr;
+    QTreeView        *m_view  = nullptr;
+
+    void setupUi();
+    void connectSignals();
+};