Add QPlatformWindow::setWindowModified(bool)

Mac OS X provided a platform API for marking a window/document as
modified. This previously worked in Qt 4, so we need to have an
interface to keep this working in Qt 5. If the platform window does not
provide an implementation, fallback to setting the window title.

Note that this does not add any QWindow API, it's only in
QPlatformWindow.

Change-Id: I84c5a5df8536859157f2b1fa9e4cc647a09fd06d
Reviewed-by: Gunnar Sletta <gunnar.sletta@nokia.com>

2 files changed, 13 insertions, 0 deletions

diff --git a/src/gui/kernel/qplatformwindow_qpa.cpp b/src/gui/kernel/qplatformwindow_qpa.cpp
index b36a2771f3..e07ed78615 100644
--- a/src/gui/kernel/qplatformwindow_qpa.cpp
+++ b/src/gui/kernel/qplatformwindow_qpa.cpp
@@ -311,6 +311,17 @@ bool QPlatformWindow::setMouseGrabEnabled(bool grab)
 }
 
 /*!
+    Reimplement to be able to let Qt indicate that the window has been
+    modified. Return true if the native window supports setting the modified
+    flag, false otherwise.
+*/
+bool QPlatformWindow::setWindowModified(bool modified)
+{
+    Q_UNUSED(modified);
+    return false;
+}
+
+/*!
     Reimplement this method to be able to do any platform specific event
     handling. All events for window() are passed to this function before being
     sent to QWindow::event().
diff --git a/src/gui/kernel/qplatformwindow_qpa.h b/src/gui/kernel/qplatformwindow_qpa.h
index 31b14ca97d..aa4d7f5054 100644
--- a/src/gui/kernel/qplatformwindow_qpa.h
+++ b/src/gui/kernel/qplatformwindow_qpa.h
@@ -113,6 +113,8 @@ public:
     virtual bool setKeyboardGrabEnabled(bool grab);
     virtual bool setMouseGrabEnabled(bool grab);
 
+    virtual bool setWindowModified(bool modified);
+
     virtual void windowEvent(QEvent *event);
 
 protected: