Extract the system tray functionality to its own class

LibraryWindow is already a monster, so we'll try to not make it bigger.

YACReaderLibrary/YACReaderLibrary.pro

@@ -13,6 +13,7 @@ INCLUDEPATH += . \
               ./comic_vine/model
 
 DEFINES += SERVER_RELEASE NOMINMAX YACREADER_LIBRARY
+QMAKE_MAC_SDK = macosx10.15
 
 # load default build flags
 include (../config.pri)
@@ -115,6 +116,7 @@ HEADERS += comic_flow.h \
   ../common/pdf_comic.h \
   no_libraries_widget.h \
   import_widget.h \
+  trayicon_controller.h \
   yacreader_local_server.h \
   yacreader_main_toolbar.h \
   comics_remover.h \
@@ -184,6 +186,7 @@ SOURCES += comic_flow.cpp \
     ../common/onstart_flow_selection_dialog.cpp \
     no_libraries_widget.cpp \
     import_widget.cpp \
+    trayicon_controller.cpp \
     yacreader_local_server.cpp \
     yacreader_main_toolbar.cpp \
     comics_remover.cpp \

YACReaderLibrary/library_window.cpp

@@ -81,14 +81,15 @@
 
 #include "yacreader_comics_views_manager.h"
 
+#include "trayicon_controller.h"
+
 #include "QsLog.h"
 
 #ifdef Q_OS_WIN
 #include <shellapi.h>
 #endif
-#ifdef Q_OS_MACOS
-#include "trayhandler.h"
-#endif
+
+using namespace YACReader;
 
 LibraryWindow::LibraryWindow()
     : QMainWindow(), fullscreen(false), previousFilter(""), fetching(false), status(LibraryWindow::Normal), removeError(false)
@@ -140,50 +141,26 @@ void LibraryWindow::setupUI()
         //if(settings->value(USE_OPEN_GL).toBool() == false)
         showMaximized();
 
-    // If a window icon was set in main() we reuse it for the tray too.
-    // This allows support for third party icon themes on Freedesktop(Linux/Unix)
-    // systems.
-    if (!QApplication::windowIcon().isNull()) {
-        trayIcon.setIcon(QApplication::windowIcon());
-    } else {
-#ifdef Q_OS_WIN
-        trayIcon.setIcon(QIcon(":/icon.ico"));
-#else
-#ifdef Q_OS_MACOS
-        auto icon = QIcon(":/macostrayicon.svg");
-        icon.setIsMask(true);
-        trayIcon.setIcon(icon);
-#else
-        trayIcon.setIcon(QIcon(":/images/iconLibrary.png"));
-#endif
-#endif
+    trayIconController = new TrayIconController(settings, this);
 }
 
-    connect(&trayIcon, &QSystemTrayIcon::activated,
-            [=](QSystemTrayIcon::ActivationReason reason) {
-                if (reason == QSystemTrayIcon::Trigger) {
-#ifdef Q_OS_MACOS
-                    OSXShowDockIcon();
-#endif
-                    setWindowState((windowState() & ~Qt::WindowMinimized) | Qt::WindowActive);
-                    show();
-                }
-            });
-    trayIcon.setVisible(settings->value(MINIMIZE_TO_TRAY, true).toBool());
-}
-
-void LibraryWindow::changeEvent(QEvent *event)
+/*void LibraryWindow::changeEvent(QEvent *event)
 {
+    QMainWindow::changeEvent(event);
+
     if (event->type() == QEvent::WindowStateChange && isMinimized() &&
         trayIcon.isVisible()) {
 #ifdef Q_OS_MACOS
         OSXHideDockIcon();
 #endif
         hide();
-        return;
-    }
-    QMainWindow::changeEvent(event);
+    } else if (event->type() == QEvent::WindowStateChange) {
+#ifdef Q_OS_MACOS
+        OSXShowDockIcon();
+#endif
+        show();
     }
+}*/
 
 void LibraryWindow::doLayout()
 {
@@ -2297,8 +2274,9 @@ void LibraryWindow::importLibrary(QString clc, QString destPath, QString name)
 
 void LibraryWindow::reloadOptions()
 {
-    //comicFlow->setFlowType(flowType);
     comicsViewsManager->comicsView->updateConfig(settings);
+
+    trayIconController->updateIconVisibility();
 }
 
 QString LibraryWindow::currentPath()
@@ -2334,6 +2312,13 @@ void LibraryWindow::showImportComicsInfo()
 #include "startup.h"
 extern Startup *s;
 void LibraryWindow::closeEvent(QCloseEvent *event)
+{
+    if (!trayIconController->handleCloseToTrayIcon(event)) {
+        closeApp(event);
+    }
+}
+
+void LibraryWindow::closeApp(QCloseEvent *event)
 {
     s->stop();
     settings->setValue(MAIN_WINDOW_GEOMETRY, saveGeometry());

YACReaderLibrary/library_window.h

@@ -5,7 +5,6 @@
 #include <QMap>
 #include <QModelIndex>
 #include <QFileInfo>
-#include <QSystemTrayIcon>
 
 #include "yacreader_global_gui.h"
 #include "yacreader_libraries.h"
@@ -77,6 +76,10 @@ class EmptySpecialListWidget;
 class EmptyReadingListWidget;
 class YACReaderComicsViewsManager;
 
+namespace YACReader {
+class TrayIconController;
+}
+
 #include "comic_db.h"
 
 using namespace YACReader;
@@ -385,7 +388,7 @@ public slots:
     void checkMaxNumLibraries();
     void showErrorUpgradingLibrary(const QString &path);
 
-    void changeEvent(QEvent *event);
+    void closeApp(QCloseEvent *event);
 
 private:
     //fullscreen mode in Windows for preventing this bug: QTBUG-41309 https://bugreports.qt.io/browse/QTBUG-41309
@@ -393,7 +396,8 @@ private:
     QPoint previousPos;
     QSize previousSize;
     std::future<void> upgradeLibraryFuture;
-    QSystemTrayIcon trayIcon;
+
+    TrayIconController *trayIconController;
 };
 
 #endif

YACReaderLibrary/trayicon_controller.cpp

@@ -0,0 +1,100 @@
+#include "trayicon_controller.h"
+
+#include "yacreader_global_gui.h"
+
+#include <QtWidgets>
+#include <QMessageBox>
+
+#ifdef Q_OS_MACOS
+#include "trayhandler.h"
+#endif
+
+using namespace YACReader;
+
+TrayIconController::TrayIconController(QSettings *settings, QMainWindow *window)
+    : QObject(nullptr), settings(settings), window(window)
+{
+
+    // If a window icon was set in main() we reuse it for the tray too.
+    // This allows support for third party icon themes on Freedesktop(Linux/Unix)
+    // systems.
+    if (!QApplication::windowIcon().isNull()) {
+        trayIcon.setIcon(QApplication::windowIcon());
+    } else {
+#ifdef Q_OS_WIN
+        trayIcon.setIcon(QIcon(":/icon.ico"));
+#else
+#ifdef Q_OS_MACOS
+        auto icon = QIcon(":/macostrayicon.svg");
+        icon.setIsMask(true);
+        trayIcon.setIcon(icon);
+#else
+        trayIcon.setIcon(QIcon(":/images/iconLibrary.png"));
+#endif
+#endif
+    }
+
+    connect(&trayIcon, &QSystemTrayIcon::activated,
+            [=](QSystemTrayIcon::ActivationReason reason) {
+                if (reason == QSystemTrayIcon::DoubleClick) {
+                    showWindow();
+                }
+            });
+
+    updateIconVisibility();
+
+    auto restoreAction = new QAction(tr("&Restore"), this);
+    connect(restoreAction, &QAction::triggered, this, &TrayIconController::showWindow);
+
+    auto quitAction = new QAction(tr("&Quit"), this);
+    connect(quitAction, &QAction::triggered, window, &QMainWindow::close);
+
+    trayIconMenu = new QMenu(this->window);
+    trayIconMenu->addAction(restoreAction);
+    trayIconMenu->addSeparator();
+    trayIconMenu->addAction(quitAction);
+
+    trayIcon.setContextMenu(trayIconMenu);
+}
+
+void TrayIconController::updateIconVisibility()
+{
+    trayIcon.setVisible(settings->value(CLOSE_TO_TRAY, false).toBool());
+}
+
+bool TrayIconController::handleCloseToTrayIcon(QCloseEvent *event)
+{
+#ifdef Q_OS_OSX
+    if (!event->spontaneous() || !window->isVisible()) {
+        return false;
+    }
+#endif
+    if (trayIcon.isVisible()) {
+        if (!settings->value(CLOSE_TO_TRAY_NOTIFIED, false).toBool()) {
+            QMessageBox::information(window, tr("Systray"),
+                                     tr("YACReaderLibrary will keep running in the "
+                                        "system tray. To terminate the program, "
+                                        "choose <b>Quit</b> in the context menu "
+                                        "of the system tray icon."));
+            settings->setValue(CLOSE_TO_TRAY_NOTIFIED, true);
+        }
+#ifdef Q_OS_OSX
+        OSXHideDockIcon();
+#endif
+        window->hide();
+        event->ignore();
+        return true;
+    } else {
+        return false;
+    }
+}
+
+void TrayIconController::showWindow()
+{
+#ifdef Q_OS_MACOS
+    OSXShowDockIcon();
+#endif
+    window->showNormal();
+    window->raise(); // for MacOS
+    window->activateWindow(); // for Windows
+}

YACReaderLibrary/trayicon_controller.h

@@ -0,0 +1,34 @@
+#ifndef TRAYICON_CONTROLLER_H
+#define TRAYICON_CONTROLLER_H
+
+#include <QtWidgets>
+#include <QSystemTrayIcon>
+
+namespace YACReader {
+
+class TrayIconController : public QObject
+{
+    Q_OBJECT
+public:
+    TrayIconController(QSettings *settings,
+                       QMainWindow *window);
+
+    void updateIconVisibility();
+
+    bool handleCloseToTrayIcon(QCloseEvent *event);
+
+    QSystemTrayIcon trayIcon;
+
+public slots:
+    void showWindow();
+
+private:
+    QSettings *settings;
+    QMainWindow *window;
+
+    QMenu *trayIconMenu;
+};
+
+}
+
+#endif // TRAYICON_CONTROLLER_H