Don't quit the program if the last window gets closed.

From: Christian Prochaska <christian.prochaska@genode-labs.com>


---
 src/gui/kernel/qwidget.cpp |   20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/src/gui/kernel/qwidget.cpp b/src/gui/kernel/qwidget.cpp
index 3a0261e..8667688 100644
--- a/src/gui/kernel/qwidget.cpp
+++ b/src/gui/kernel/qwidget.cpp
@@ -7929,6 +7929,26 @@ bool QWidgetPrivate::close_helper(CloseMode mode)
     QPointer<QWidget> that = q;
     QPointer<QWidget> parentWidget = q->parentWidget();
 
+#ifdef Q_OS_GENODE
+    /* prevent closing of the last window in the demo */
+    if (parentWidget.isNull() || !parentWidget->isVisible() || parentWidget->testAttribute(Qt::WA_DontShowOnScreen)) {
+		QWidgetList list = QApplication::topLevelWidgets();
+		bool lastWindowClosed = true;
+		for (int i = 0; i < list.size(); ++i) {
+			QWidget *w = list.at(i);
+			if ((w != q) && (w->isVisible() && !w->testAttribute(Qt::WA_DontShowOnScreen))
+					&& !w->parentWidget()) {
+				lastWindowClosed = false;
+				break;
+			}
+		}
+		if (lastWindowClosed) {
+			data.is_closing = 0;
+			return false;
+		}
+    }
+#endif
+
 #ifdef QT3_SUPPORT
     bool isMain = (QApplicationPrivate::main_widget == q);
 #endif