Neater system tray initialisation.

src/ui/mainwindow.cpp

@@ -102,11 +102,7 @@ const char* MainWindow::kAllFilesFilterSpec =
 MainWindow::MainWindow(NetworkAccessManager* network, Engine::Type engine, QWidget *parent)
   : QMainWindow(parent),
     ui_(new Ui_MainWindow),
-#ifdef Q_OS_DARWIN
+    tray_icon_(SystemTrayIcon::CreateSystemTrayIcon(this)),
-    tray_icon_(new MacSystemTrayIcon(this)),
-#else
-    tray_icon_(new QtSystemTrayIcon(this)),
-#endif
     osd_(new OSD(tray_icon_, network, this)),
     edit_tag_dialog_(new EditTagDialog),
     about_dialog_(new About),

src/ui/systemtrayicon.cpp

@@ -16,6 +16,9 @@
 
 #include "systemtrayicon.h"
 
+#include "macsystemtrayicon.h"
+#include "qtsystemtrayicon.h"
+
 #include <QApplication>
 #include <QEvent>
 #include <QWheelEvent>
@@ -94,3 +97,11 @@ void SystemTrayIcon::SetStopped() {
   current_state_icon_ = QPixmap();
   UpdateIcon();
 }
+
+SystemTrayIcon* SystemTrayIcon::CreateSystemTrayIcon(QObject* parent) {
+#ifdef Q_OS_DARWIN
+  return new MacSystemTrayIcon(parent);
+#else
+  return new QtSystemTrayIcon(parent);
+#endif
+}

src/ui/systemtrayicon.h

@@ -40,6 +40,8 @@ class SystemTrayIcon : public QObject {
   virtual void ShowPopup(const QString& summary, const QString& message,
                          int timeout) {}
 
+  static SystemTrayIcon* CreateSystemTrayIcon(QObject* parent = 0);
+
  public slots:
   void SetProgress(int percentage);
   void SetPaused();