diff -r 56cd8111b7f7 -r 41300fa6a67c examples/mainwindows/mdi/mainwindow.cpp
--- a/examples/mainwindows/mdi/mainwindow.cpp	Tue Jan 26 12:42:25 2010 +0200
+++ b/examples/mainwindows/mdi/mainwindow.cpp	Tue Feb 02 00:43:10 2010 +0200
@@ -50,11 +50,11 @@
     mdiArea->setHorizontalScrollBarPolicy(Qt::ScrollBarAsNeeded);
     mdiArea->setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);
     setCentralWidget(mdiArea);
-    connect(mdiArea, SIGNAL(subWindowActivated(QMdiSubWindow *)),
+    connect(mdiArea, SIGNAL(subWindowActivated(QMdiSubWindow*)),
             this, SLOT(updateMenus()));
     windowMapper = new QSignalMapper(this);
-    connect(windowMapper, SIGNAL(mapped(QWidget *)),
-            this, SLOT(setActiveSubWindow(QWidget *)));
+    connect(windowMapper, SIGNAL(mapped(QWidget*)),
+            this, SLOT(setActiveSubWindow(QWidget*)));
 
     createActions();
     createMenus();
@@ -71,7 +71,7 @@
 void MainWindow::closeEvent(QCloseEvent *event)
 {
     mdiArea->closeAllSubWindows();
-    if (activeMdiChild()) {
+    if (mdiArea->currentSubWindow()) {
         event->ignore();
     } else {
         writeSettings();