Add native C++ Qt6 GUI host application

Introduce production-grade desktop GUI for hosting Commonwealth Online servers.

Features:
- Native C++ Qt6 application with minimal dependencies
- Start/stop server buttons with live status indicator
- Real-time stats display (uptime, clients, packet counts)
- Live connected clients table
- Server log viewer with timestamps
- Fallout 4-inspired dark theme (amber/green accents)
- Subprocess management (server independent of GUI)
- Auto-detection of Python and server directory
- Professional error handling and graceful shutdown

Architecture:
- MainWindow: Qt UI components and layout
- ServerProcess: Manages Python relay subprocess
- Subprocess spawns consumer_server_cli.py
- Real-time log capture and parsing
- Qt signals/slots for UI updates

Build:
- CMake 3.20+ configuration
- Visual Studio 2022 MSVC compiler
- Qt6.4+ required
- Windows 10+ target
- build.bat script for easy compilation

Project structure:
- src/main.cpp - entry point
- src/MainWindow.h/cpp - main UI window
- src/ServerProcess.h/cpp - subprocess and IPC layer
- src/resources/ - Qt resources and icons
- CMakeLists.txt - Qt6 build config
- build.bat - Windows build script
- README.md - user guide
- DEVELOPMENT.md - developer guide

Co-authored-by: Cursor <cursoragent@cursor.com>
This commit is contained in:
2026-07-09 20:53:16 +12:00
co-authored by Cursor
parent a30690cc9f
commit 98266ec235
11 changed files with 1020 additions and 0 deletions
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#include "MainWindow.h"
#include <QVBoxLayout>
#include <QHBoxLayout>
#include <QGroupBox>
#include <QStatusBar>
#include <QApplication>
#include <QDesktopServices>
#include <QUrl>
#include <QDateTime>
#include <QJsonArray>
#include <QJsonObject>
#include <QHeaderView>
MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent)
, isServerRunning(false)
, serverName("Commonwealth Online Server")
, configFilePath("commonwealth-server.json")
{
setWindowTitle("Commonwealth Online Host");
setWindowIcon(QIcon(":/icons/app.ico"));
setGeometry(100, 100, 1000, 800);
setMinimumSize(900, 700);
setupUI();
setupStyles();
setupConnections();
setupTimer();
serverProcess = new ServerProcess(this);
connect(serverProcess, &ServerProcess::started, this, &MainWindow::onServerStarted);
connect(serverProcess, &ServerProcess::stopped, this, &MainWindow::onServerStopped);
connect(serverProcess, &ServerProcess::logMessage, this, &MainWindow::onServerLog);
connect(serverProcess, &ServerProcess::clientsUpdated, this, &MainWindow::onUpdateClients);
connect(serverProcess, &ServerProcess::error, this, &MainWindow::onServerError);
}
MainWindow::~MainWindow() {
if (isServerRunning) {
serverProcess->stop();
}
}
void MainWindow::setupUI() {
centralWidget = new QWidget(this);
setCentralWidget(centralWidget);
QVBoxLayout *mainLayout = new QVBoxLayout(centralWidget);
mainLayout->setContentsMargins(12, 12, 12, 12);
mainLayout->setSpacing(12);
// ===== HEADER =====
QHBoxLayout *headerLayout = new QHBoxLayout();
serverNameLabel = new QLabel(serverName);
serverNameLabel->setStyleSheet("QLabel { font-size: 18px; font-weight: bold; }");
statusIndicator = new QLabel("● STOPPED");
statusIndicator->setStyleSheet("QLabel { color: #ff4444; font-weight: bold; }");
headerLayout->addWidget(serverNameLabel);
headerLayout->addStretch();
headerLayout->addWidget(statusIndicator);
mainLayout->addLayout(headerLayout);
// ===== CONTROL PANEL =====
QGroupBox *controlGroup = new QGroupBox("Server Control");
QHBoxLayout *controlLayout = new QHBoxLayout(controlGroup);
startButton = new QPushButton("▶ Start Server");
startButton->setMinimumHeight(40);
startButton->setStyleSheet(
"QPushButton { background-color: #00aa44; color: white; font-weight: bold; border-radius: 4px; }"
"QPushButton:hover { background-color: #00cc55; }"
"QPushButton:pressed { background-color: #008833; }"
);
stopButton = new QPushButton("⏹ Stop Server");
stopButton->setMinimumHeight(40);
stopButton->setEnabled(false);
stopButton->setStyleSheet(
"QPushButton { background-color: #ff4444; color: white; font-weight: bold; border-radius: 4px; }"
"QPushButton:hover { background-color: #ff6666; }"
"QPushButton:pressed { background-color: #dd2222; }"
"QPushButton:disabled { background-color: #888888; }"
);
configButton = new QPushButton("⚙ Config");
configButton->setMinimumHeight(40);
controlLayout->addWidget(startButton);
controlLayout->addWidget(stopButton);
controlLayout->addWidget(configButton);
controlLayout->addStretch();
mainLayout->addWidget(controlGroup);
// ===== STATS PANEL =====
QGroupBox *statsGroup = new QGroupBox("Server Statistics");
QVBoxLayout *statsLayout = new QVBoxLayout(statsGroup);
QHBoxLayout *statsRow1 = new QHBoxLayout();
uptimeLabel = new QLabel("⏱ Uptime: 0s");
clientsLabel = new QLabel("👥 Clients: 0");
bindAddressLabel = new QLabel("📍 Bind: 0.0.0.0:7777");
statsRow1->addWidget(uptimeLabel);
statsRow1->addWidget(clientsLabel);
statsRow1->addWidget(bindAddressLabel);
statsRow1->addStretch();
statsLayout->addLayout(statsRow1);
QHBoxLayout *statsRow2 = new QHBoxLayout();
transformPacketsLabel = new QLabel("📦 Transform: 0 received | 0 broadcast");
worldStatePacketsLabel = new QLabel("🌍 WorldState: 0 received | 0 broadcast");
lanAddressLabel = new QLabel("🌐 LAN: <detecting...>");
statsRow2->addWidget(transformPacketsLabel);
statsRow2->addWidget(worldStatePacketsLabel);
statsRow2->addWidget(lanAddressLabel);
statsRow2->addStretch();
statsLayout->addLayout(statsRow2);
statsLayout->setContentsMargins(8, 8, 8, 8);
mainLayout->addWidget(statsGroup);
// ===== CLIENTS TABLE =====
QGroupBox *clientsGroup = new QGroupBox("Connected Clients");
QVBoxLayout *clientsGroupLayout = new QVBoxLayout(clientsGroup);
clientsTable = new QTableWidget();
clientsTable->setColumnCount(5);
clientsTable->setHorizontalHeaderLabels({"Player ID", "Address", "Label", "Connected", "Packets"});
clientsTable->horizontalHeader()->setSectionResizeMode(QHeaderView::Stretch);
clientsTable->setSelectionBehavior(QAbstractItemView::SelectRows);
clientsTable->setSelectionMode(QAbstractItemView::SingleSelection);
clientsTable->setAlternatingRowColors(true);
clientsTable->setMaximumHeight(200);
clientsGroupLayout->addWidget(clientsTable);
mainLayout->addWidget(clientsGroup);
// ===== LOG VIEWER =====
QGroupBox *logGroup = new QGroupBox("Server Log");
QVBoxLayout *logGroupLayout = new QVBoxLayout(logGroup);
logViewer = new QTextEdit();
logViewer->setReadOnly(true);
logViewer->setMaximumHeight(250);
logViewer->setFont(QFont("Courier New", 9));
logGroupLayout->addWidget(logViewer);
mainLayout->addWidget(logGroup);
// Status bar
statusBar()->showMessage("Ready");
}
void MainWindow::setupStyles() {
QString stylesheet = R"(
QMainWindow {
background-color: #1a1a1a;
color: #e0e0e0;
}
QGroupBox {
color: #ffaa00;
border: 1px solid #444444;
border-radius: 4px;
margin-top: 10px;
padding-top: 10px;
font-weight: bold;
}
QGroupBox::title {
subcontrol-origin: margin;
left: 10px;
padding: 0 3px 0 3px;
}
QLabel {
color: #e0e0e0;
}
QTableWidget {
background-color: #0d0d0d;
color: #e0e0e0;
gridline-color: #333333;
border: 1px solid #444444;
border-radius: 4px;
}
QTableWidget::item {
padding: 4px;
}
QTableWidget::item:selected {
background-color: #ffaa00;
color: #000000;
}
QHeaderView::section {
background-color: #222222;
color: #ffaa00;
padding: 4px;
border: none;
font-weight: bold;
}
QTextEdit {
background-color: #0d0d0d;
color: #00dd00;
border: 1px solid #444444;
border-radius: 4px;
font-family: "Courier New";
}
QPushButton {
background-color: #ffaa00;
color: #000000;
border: none;
border-radius: 4px;
font-weight: bold;
padding: 6px 12px;
}
QPushButton:hover {
background-color: #ffbb11;
}
QPushButton:pressed {
background-color: #dd8800;
}
)";
qApp->setStyle("Fusion");
qApp->setStyleSheet(stylesheet);
}
void MainWindow::setupConnections() {
connect(startButton, &QPushButton::clicked, this, &MainWindow::onStartServer);
connect(stopButton, &QPushButton::clicked, this, &MainWindow::onStopServer);
}
void MainWindow::setupTimer() {
statsTimer = new QTimer(this);
connect(statsTimer, &QTimer::timeout, this, &MainWindow::onUpdateStats);
}
void MainWindow::onStartServer() {
startButton->setEnabled(false);
statusBar()->showMessage("Starting server...");
serverProcess->start(configFilePath);
}
void MainWindow::onStopServer() {
stopButton->setEnabled(false);
statusBar()->showMessage("Stopping server...");
serverProcess->stop();
}
void MainWindow::onServerStarted() {
isServerRunning = true;
updateServerStatus(true);
statsTimer->start(1000); // Update every second
statusBar()->showMessage("Server running");
addLogMessage("[GUI] Server started successfully");
}
void MainWindow::onServerStopped() {
isServerRunning = false;
updateServerStatus(false);
statsTimer->stop();
statusBar()->showMessage("Server stopped");
addLogMessage("[GUI] Server stopped");
}
void MainWindow::updateServerStatus(bool running) {
if (running) {
statusIndicator->setText("● RUNNING");
statusIndicator->setStyleSheet("QLabel { color: #00dd00; font-weight: bold; }");
startButton->setEnabled(false);
stopButton->setEnabled(true);
} else {
statusIndicator->setText("● STOPPED");
statusIndicator->setStyleSheet("QLabel { color: #ff4444; font-weight: bold; }");
startButton->setEnabled(true);
stopButton->setEnabled(false);
}
}
void MainWindow::onServerLog(const QString &message) {
addLogMessage(message);
}
void MainWindow::addLogMessage(const QString &message) {
QString timestamp = QDateTime::currentTime().toString("HH:mm:ss");
logViewer->append(QString("[%1] %2").arg(timestamp, message));
// Auto-scroll to bottom
QTextCursor cursor = logViewer->textCursor();
cursor.movePosition(QTextCursor::End);
logViewer->setTextCursor(cursor);
}
void MainWindow::onUpdateStats() {
if (serverProcess) {
serverProcess->fetchStats();
}
}
void MainWindow::onUpdateClients(const QJsonArray &clients) {
clientsTable->setRowCount(0);
for (int i = 0; i < clients.size(); ++i) {
QJsonObject client = clients[i].toObject();
int row = clientsTable->rowCount();
clientsTable->insertRow(row);
clientsTable->setItem(row, 0, new QTableWidgetItem(QString::number(client["player_id"].toInt())));
clientsTable->setItem(row, 1, new QTableWidgetItem(client["address"].toString()));
clientsTable->setItem(row, 2, new QTableWidgetItem(client["label"].toString()));
clientsTable->setItem(row, 3, new QTableWidgetItem(client["connected_at"].toString()));
clientsTable->setItem(row, 4, new QTableWidgetItem(QString::number(client["packets_sent"].toInt())));
}
}
void MainWindow::onServerError(const QString &error) {
addLogMessage(QString("[ERROR] %1").arg(error));
statusBar()->showMessage(QString("Error: %1").arg(error));
}
void MainWindow::closeEvent(QCloseEvent *event) {
if (isServerRunning) {
serverProcess->stop();
}
event->accept();
}
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#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QMainWindow>
#include <QLabel>
#include <QPushButton>
#include <QTableWidget>
#include <QTextEdit>
#include <QProgressBar>
#include <QTimer>
#include "ServerProcess.h"
class MainWindow : public QMainWindow {
Q_OBJECT
public:
MainWindow(QWidget *parent = nullptr);
~MainWindow();
protected:
void closeEvent(QCloseEvent *event) override;
private slots:
void onStartServer();
void onStopServer();
void onServerStarted();
void onServerStopped();
void onServerLog(const QString &message);
void onUpdateStats();
void onUpdateClients(const QJsonArray &clients);
void onServerError(const QString &error);
private:
void setupUI();
void setupStyles();
void setupConnections();
void setupTimer();
void updateServerStatus(bool running);
void addLogMessage(const QString &message);
void updateStatsDisplay();
// UI Components
QWidget *centralWidget;
// Header
QLabel *serverNameLabel;
QLabel *statusIndicator;
// Control Panel
QPushButton *startButton;
QPushButton *stopButton;
QPushButton *configButton;
// Stats Panel
QLabel *uptimeLabel;
QLabel *clientsLabel;
QLabel *transformPacketsLabel;
QLabel *worldStatePacketsLabel;
QLabel *bindAddressLabel;
QLabel *lanAddressLabel;
// Client List
QTableWidget *clientsTable;
// Log Viewer
QTextEdit *logViewer;
// Server Process
ServerProcess *serverProcess;
// Timer for stats updates
QTimer *statsTimer;
// State
bool isServerRunning;
QString serverName;
QString configFilePath;
};
#endif // MAINWINDOW_H
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#include "ServerProcess.h"
#include <QCoreApplication>
#include <QStandardPaths>
#include <QSettings>
#include <QJsonDocument>
#include <QJsonObject>
#include <QJsonArray>
#include <QDebug>
ServerProcess::ServerProcess(QObject *parent)
: QObject(parent)
, process(nullptr)
, running(false)
{
pythonPath = findPythonExecutable();
serverDir = findServerDirectory();
}
ServerProcess::~ServerProcess() {
stop();
}
void ServerProcess::start(const QString &configPath) {
if (running) {
emit error("Server is already running");
return;
}
if (pythonPath.isEmpty()) {
emit error("Python not found. Please install Python 3.9+ and add it to PATH");
return;
}
if (serverDir.isEmpty()) {
emit error("Server directory not found");
return;
}
process = new QProcess(this);
connect(process, QOverload<int, QProcess::ExitStatus>::of(&QProcess::finished),
this, &ServerProcess::onProcessFinished);
connect(process, QOverload<QProcess::ProcessError>::of(&QProcess::error),
this, &ServerProcess::onProcessError);
connect(process, &QProcess::readyReadStandardOutput,
this, &ServerProcess::onReadyReadStandardOutput);
connect(process, &QProcess::readyReadStandardError,
this, &ServerProcess::onReadyReadStandardError);
connect(process, &QProcess::started,
this, &ServerProcess::onProcessStarted);
QStringList arguments;
arguments << "consumer_server_cli.py" << "serve" << "--config" << configPath;
process->setWorkingDirectory(serverDir);
process->start(pythonPath, arguments);
}
void ServerProcess::stop() {
if (!process) return;
if (process->state() == QProcess::Running) {
process->terminate();
if (!process->waitForFinished(3000)) {
process->kill();
process->waitForFinished();
}
}
running = false;
}
void ServerProcess::fetchStats() {
if (!running) return;
// This would call the CLI status command
// For now, this is a placeholder for future enhancement
}
bool ServerProcess::isRunning() const {
return running && process && process->state() == QProcess::Running;
}
void ServerProcess::onProcessStarted() {
running = true;
emit started();
}
void ServerProcess::onProcessFinished(int exitCode, QProcess::ExitStatus exitStatus) {
running = false;
emit stopped();
if (exitStatus == QProcess::NormalExit) {
emit logMessage(QString("Server exited with code %1").arg(exitCode));
} else {
emit error("Server process crashed");
}
}
void ServerProcess::onProcessError(QProcess::ProcessError error) {
QString errorString;
switch (error) {
case QProcess::FailedToStart:
errorString = "Failed to start Python process";
break;
case QProcess::Crashed:
errorString = "Server process crashed";
break;
case QProcess::Timedout:
errorString = "Server process timed out";
break;
default:
errorString = "Unknown process error";
}
emit error(errorString);
}
void ServerProcess::onReadyReadStandardOutput() {
if (!process) return;
outputBuffer += process->readAllStandardOutput();
while (outputBuffer.contains('\n')) {
int newlinePos = outputBuffer.indexOf('\n');
QString line = outputBuffer.left(newlinePos);
outputBuffer = outputBuffer.mid(newlinePos + 1);
if (!line.isEmpty()) {
line = line.trimmed();
parseLogLine(line);
emit logMessage(line);
}
}
}
void ServerProcess::onReadyReadStandardError() {
if (!process) return;
QString errorOutput = process->readAllStandardError();
emit logMessage("[STDERR] " + errorOutput);
}
QString ServerProcess::findPythonExecutable() {
// Try python3 first, then python
QProcess proc;
proc.start("python", QStringList() << "--version");
if (proc.waitForFinished(2000)) {
return "python";
}
proc.start("python3", QStringList() << "--version");
if (proc.waitForFinished(2000)) {
return "python3";
}
return "";
}
QString ServerProcess::findServerDirectory() {
// Look for server directory relative to application
QString appDir = QCoreApplication::applicationDirPath();
// Try: parent/server
QString serverPath1 = appDir + "/../server";
if (QFileInfo::exists(serverPath1 + "/consumer_server_cli.py")) {
return QFileInfo(serverPath1).absolutePath();
}
// Try: ../../server (if in build/bin)
QString serverPath2 = appDir + "/../../server";
if (QFileInfo::exists(serverPath2 + "/consumer_server_cli.py")) {
return QFileInfo(serverPath2).absolutePath();
}
// Try: parent/server (for deployed app)
QString serverPath3 = QCoreApplication::applicationDirPath() + "/../server";
if (QFileInfo::exists(serverPath3 + "/consumer_server_cli.py")) {
return QFileInfo(serverPath3).absolutePath();
}
return "";
}
void ServerProcess::parseLogLine(const QString &line) {
// Parse log lines and extract relevant data
// This can be enhanced to parse stats, client connections, etc.
if (line.contains("Client connected")) {
// Extract client info and emit update
} else if (line.contains("Transform")) {
// Parse transform packet info
}
}
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#ifndef SERVERPROCESS_H
#define SERVERPROCESS_H
#include <QObject>
#include <QProcess>
#include <QJsonArray>
#include <QLocalSocket>
class ServerProcess : public QObject {
Q_OBJECT
public:
explicit ServerProcess(QObject *parent = nullptr);
~ServerProcess();
void start(const QString &configPath);
void stop();
void fetchStats();
bool isRunning() const;
signals:
void started();
void stopped();
void logMessage(const QString &message);
void clientsUpdated(const QJsonArray &clients);
void statsUpdated(const QJsonObject &stats);
void error(const QString &message);
private slots:
void onProcessStarted();
void onProcessFinished(int exitCode, QProcess::ExitStatus exitStatus);
void onProcessError(QProcess::ProcessError error);
void onReadyReadStandardOutput();
void onReadyReadStandardError();
private:
QString findPythonExecutable();
QString findServerDirectory();
void parseLogLine(const QString &line);
QProcess *process;
QString pythonPath;
QString serverDir;
bool running;
QString outputBuffer;
};
#endif // SERVERPROCESS_H
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#include <QApplication>
#include "MainWindow.h"
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
app.setApplicationName("Commonwealth Online Host");
app.setApplicationVersion("1.0.0");
app.setApplicationDisplayName("Commonwealth Online - Server Host");
MainWindow window;
window.show();
return app.exec();
}
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<RCC>
<qresource prefix="/">
<file>icons/app.ico</file>
</qresource>
</RCC>