OS X: Restore main window when clicking on the docker icon.

Apparently this worked previously. Maybe a regression in Qt?

Refs #326

src/gui/Application.cpp

@@ -24,9 +24,15 @@
 
 Application::Application(int& argc, char** argv)
     : QApplication(argc, argv)
+    , m_mainWindow(Q_NULLPTR)
 {
 }
 
+void Application::setMainWindow(QWidget* mainWindow)
+{
+    m_mainWindow = mainWindow;
+}
+
 bool Application::event(QEvent* event)
 {
     // Handle Apple QFileOpenEvent from finder (double click on .kdbx file)
@@ -34,6 +40,16 @@ bool Application::event(QEvent* event)
         Q_EMIT openFile(static_cast<QFileOpenEvent*>(event)->file());
         return true;
     }
+#ifdef Q_OS_MAC
+    // restore main window when clicking on the docker icon
+    else if ((event->type() == QEvent::ApplicationActivate) && m_mainWindow) {
+        m_mainWindow->ensurePolished();
+        m_mainWindow->setWindowState(m_mainWindow->windowState() & ~Qt::WindowMinimized);
+        m_mainWindow->show();
+        m_mainWindow->raise();
+        m_mainWindow->activateWindow();
+    }
+#endif
 
     return QApplication::event(event);
 }

src/gui/Application.h

@@ -29,6 +29,7 @@ class Application : public QApplication
 
 public:
     Application(int& argc, char** argv);
+    void setMainWindow(QWidget* mainWindow);
 
     bool event(QEvent* event) Q_DECL_OVERRIDE;
 #ifdef Q_WS_X11
@@ -37,6 +38,9 @@ public:
 
 Q_SIGNALS:
     void openFile(const QString& filename);
+
+private:
+    QWidget* m_mainWindow;
 };
 
 #endif // KEEPASSX_APPLICATION_H

src/main.cpp

@@ -82,6 +82,7 @@ int main(int argc, char** argv)
 
     MainWindow mainWindow;
     mainWindow.show();
+    app.setMainWindow(&mainWindow);
 
     QObject::connect(&app, SIGNAL(openFile(QString)), &mainWindow, SLOT(openDatabase(QString)));