tools/chatgui: Qt5 GUI chat app stub with tray, channel list, message bubbles

tools/chatgui/src/mainwindow.cpp

@@ -0,0 +1,83 @@
+#include "mainwindow.h"
+#include "channellist.h"
+#include "messagelist.h"
+#include "accountlist.h"
+#include <QSplitter>
+#include <QCloseEvent>
+#include <QApplication>
+#include <QStyle>
+
+MainWindow::MainWindow(QWidget *parent)
+    : QMainWindow(parent)
+    , m_channelList(nullptr)
+    , m_messageList(nullptr)
+    , m_accountList(nullptr)
+    , m_trayIcon(nullptr)
+    , m_trayMenu(nullptr)
+{
+    setWindowTitle("Chat");
+    resize(900, 600);
+
+    setupUi();
+    setupTray();
+}
+
+void MainWindow::setupUi() {
+    auto *splitter = new QSplitter(Qt::Horizontal, this);
+
+    m_channelList = new ChannelList(splitter);
+    m_messageList = new MessageList(splitter);
+    m_accountList = new AccountList(splitter);
+
+    splitter->addWidget(m_channelList);
+    splitter->addWidget(m_messageList);
+    splitter->addWidget(m_accountList);
+
+    splitter->setStretchFactor(0, 2);
+    splitter->setStretchFactor(1, 5);
+    splitter->setStretchFactor(2, 1);
+
+    splitter->setSizes({220, 480, 180});
+
+    setCentralWidget(splitter);
+}
+
+void MainWindow::setupTray() {
+    m_trayIcon = new QSystemTrayIcon(this);
+    m_trayIcon->setIcon(style()->standardIcon(QStyle::SP_ComputerIcon));
+    m_trayIcon->setToolTip("Chat");
+
+    m_trayMenu = new QMenu(this);
+    QAction *showAction = m_trayMenu->addAction("Show");
+    connect(showAction, &QAction::triggered, this, [this]() {
+        show();
+        raise();
+        activateWindow();
+    });
+
+    QAction *quitAction = m_trayMenu->addAction("Quit");
+    connect(quitAction, &QAction::triggered, qApp, &QApplication::quit);
+
+    m_trayIcon->setContextMenu(m_trayMenu);
+
+    connect(m_trayIcon, &QSystemTrayIcon::activated,
+            this, &MainWindow::onTrayActivated);
+
+    m_trayIcon->show();
+}
+
+void MainWindow::closeEvent(QCloseEvent *event) {
+    hide();
+    m_trayIcon->showMessage("Chat", "Application minimized to tray.",
+                            QSystemTrayIcon::Information, 2000);
+    event->ignore();
+}
+
+void MainWindow::onTrayActivated(QSystemTrayIcon::ActivationReason reason) {
+    if (reason == QSystemTrayIcon::Trigger ||
+        reason == QSystemTrayIcon::DoubleClick) {
+        show();
+        raise();
+        activateWindow();
+    }
+}