OS X: Add action for closing external windows

E.g. editor windows and help windows. There is no automatic system
shortcut for this on OS X.

Change-Id: I27f1208cde0a6f4b1a6952a7988d00a8481a08a4
Reviewed-by: Daniel Teske <daniel.teske@digia.com>

src/plugins/coreplugin/coreconstants.h

@@ -103,6 +103,7 @@ const char TOGGLE_FULLSCREEN[]     = "QtCreator.ToggleFullScreen";
 
 const char MINIMIZE_WINDOW[]       = "QtCreator.MinimizeWindow";
 const char ZOOM_WINDOW[]           = "QtCreator.ZoomWindow";
+const char CLOSE_WINDOW[]           = "QtCreator.CloseWindow";
 
 const char SPLIT[]                 = "QtCreator.Split";
 const char SPLIT_SIDE_BY_SIDE[]    = "QtCreator.SplitSideBySide";

src/plugins/coreplugin/mainwindow.cpp

@@ -330,6 +330,7 @@ bool MainWindow::init(QString *errorMessage)
 void MainWindow::extensionsInitialized()
 {
     m_windowSupport = new WindowSupport(this, Context("Core.MainWindow"));
+    m_windowSupport->setCloseActionEnabled(false);
     m_editorManager->init();
     m_statusBarManager->extensionsInitalized();
     OutputPaneManager::instance()->init();
@@ -654,8 +655,17 @@ void MainWindow::registerDefaultActions()
         cmd->setAttribute(Command::CA_UpdateText);
     mwindow->addAction(cmd, Constants::G_WINDOW_SIZE);
 
-    if (UseMacShortcuts)
+    if (UseMacShortcuts) {
+        mwindow->addSeparator(globalContext, Constants::G_WINDOW_SIZE);
+
+        QAction *closeAction = new QAction(tr("Close Window"), this);
+        closeAction->setEnabled(false);
+        cmd = ActionManager::registerAction(closeAction, Constants::CLOSE_WINDOW, globalContext);
+        cmd->setDefaultKeySequence(QKeySequence(tr("Ctrl+Meta+W")));
+        mwindow->addAction(cmd, Constants::G_WINDOW_SIZE);
+
         mwindow->addSeparator(globalContext, Constants::G_WINDOW_SIZE);
+    }
 
     // Show Sidebar Action
     m_toggleSideBarAction = new QAction(QIcon(QLatin1String(Constants::ICON_TOGGLE_SIDEBAR)),

src/plugins/coreplugin/windowsupport.cpp

@@ -61,6 +61,10 @@ WindowSupport::WindowSupport(QWidget *window, const Context &context)
         m_zoomAction = new QAction(this);
         ActionManager::registerAction(m_zoomAction, Constants::ZOOM_WINDOW, context);
         connect(m_zoomAction, SIGNAL(triggered()), m_window, SLOT(showMaximized()));
+
+        m_closeAction = new QAction(this);
+        ActionManager::registerAction(m_closeAction, Constants::CLOSE_WINDOW, context);
+        connect(m_closeAction, SIGNAL(triggered()), m_window, SLOT(close()), Qt::QueuedConnection);
     }
 
     m_toggleFullScreenAction = new QAction(this);
@@ -74,6 +78,12 @@ WindowSupport::~WindowSupport()
     ICore::removeContextObject(m_contextObject);
 }
 
+void WindowSupport::setCloseActionEnabled(bool enabled)
+{
+    if (UseMacShortcuts)
+        m_closeAction->setEnabled(enabled);
+}
+
 bool WindowSupport::eventFilter(QObject *obj, QEvent *event)
 {
     if (obj != m_window)

src/plugins/coreplugin/windowsupport.h

@@ -49,6 +49,8 @@ public:
     WindowSupport(QWidget *window, const Context &context);
     ~WindowSupport();
 
+    void setCloseActionEnabled(bool enabled);
+
 protected:
     bool eventFilter(QObject *obj, QEvent *event);
 
@@ -61,6 +63,7 @@ private:
     IContext *m_contextObject;
     QAction *m_minimizeAction;
     QAction *m_zoomAction;
+    QAction *m_closeAction;
     QAction *m_toggleFullScreenAction;
 };