Fix cancel on quit

* src/lyxfunc.C
	(LyXFunc::dispatch): Move to GuiView::closeEvent the session code
	for lastpos in LFUN_LYX_QUIT. Check for unsaved changes before
	initiating the quit procedure in LFUN_LYX_QUIT and LFUN_WINDOW_CLOSE. 

	* src/frontends/qt4/GuiView.h
	(class GuiView): New boolean member quitting_by_menu_.

	* src/frontends/qt4/GuiView.C
	(GuiView::GuiView): Initialize quitting_by_menu_.
	(GuiView::close): Set to true quitting_by_menu_ before calling
	the quit procedure and reset it afterwards.
	(GuiView::closeEvent): Account for the close window button.
	Save last positions to the session file. Remove wrongly placed
	call to quitWriteAll.


git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@16248 a592a061-630c-0410-9148-cb99ea01b6c8

Status.15x

@@ -40,9 +40,6 @@ FILE
 
 * Non-ascii filenames do not work at all and result in an assertion or garbage.
 
-* open lyx, create a new document, enter a few chars, quit, click cancel, lyx
-  still quits.
-
 * Change Tools->Preferences->User interface->User interface to something like
   "kornel.default.ui"; save prefs; exit LyX; restart LyX; => crash; 
   in the preferences file, there is an entry \bind_file "/Something/kornel.default"
@@ -553,3 +550,7 @@ CREDITS:
   MSVC 2005 Prof., Scons) 
   FIXED (JSpitzm 2006-12-11)
 
+* open lyx, create a new document, enter a few chars, quit, click cancel, lyx
+  still quits.
+  FIXED (Enrico 2006-12-12)
+

src/frontends/qt4/GuiView.C

@@ -156,7 +156,8 @@ unsigned int GuiView::GuiViewPrivate::lastIconSize = 0;
 
 
 GuiView::GuiView(int id)
-	: QMainWindow(), LyXView(id), commandbuffer_(0), d(*new GuiViewPrivate)
+	: QMainWindow(), LyXView(id), commandbuffer_(0), d(*new GuiViewPrivate),
+	  quitting_by_menu_(false)
 {
 	// Qt bug? signal lastWindowClosed does not work
 	setAttribute(Qt::WA_QuitOnClose, false);
@@ -186,7 +187,9 @@ GuiView::~GuiView()
 
 void GuiView::close()
 {
+	quitting_by_menu_ = true;
 	QMainWindow::close();
+	quitting_by_menu_ = false;
 }
 
 
@@ -240,13 +243,27 @@ void GuiView::macQuit()
 
 void GuiView::closeEvent(QCloseEvent * close_event)
 {
+	// we may have been called through the close window button
+	// which bypasses the LFUN machinery.
+	if (!quitting_by_menu_) {
+		if (!theBufferList().quitWriteAll()) {
+			close_event->ignore();
+			return;
+		}
+	}
+	if (view()->buffer()) {
+		// save cursor position for opened files to .lyx/session
+		LyX::ref().session().lastFilePos().save(
+			FileName(buffer()->fileName()),
+			boost::tie(view()->cursor().pit(),
+			view()->cursor().pos()));
+	}
 	theApp()->gui().unregisterView(id());	
 	if (theApp()->gui().viewIds().empty())
 	{
 		// this is the place where we leave the frontend.
 		// it is the only point at which we start quitting.
 		saveGeometry();
-		theBufferList().quitWriteAll();
 		close_event->accept();
 		// quit the event loop
 		qApp->quit();

src/frontends/qt4/GuiView.h

@@ -132,6 +132,9 @@ private:
 	/// command buffer
 	QCommandBuffer * commandbuffer_;
 
+	/// are we quitting by the menu?
+	bool quitting_by_menu_;
+
 	///
 	void updateFloatingGeometry();
 	///

src/lyxfunc.C

@@ -1034,19 +1034,10 @@ void LyXFunc::dispatch(FuncRequest const & cmd)
 			break;
 
 		case LFUN_LYX_QUIT:
-			// FIXME: this code needs to be transfered somewhere else
-			// as lyx_view_ will most certainly be null and a same buffer
-			// might be visible in more than one LyXView.
-			if (lyx_view_ && lyx_view_->view()->buffer()) {
-				// save cursor Position for opened files to .lyx/session
-				LyX::ref().session().lastFilePos().save(FileName(lyx_view_->buffer()->fileName()),
-					boost::tie(view()->cursor().pit(), view()->cursor().pos()) );
-			}
-			
-			// save the geometry of the current view 
-			lyx_view_->saveGeometry();
-			// quitting is triggered by the gui code (leaving the event loop)
-			theApp()->gui().closeAllViews();
+			// quitting is triggered by the gui code
+			// (leaving the event loop).
+			if (theBufferList().quitWriteAll())
+				theApp()->gui().closeAllViews();
 			break;
 
 		case LFUN_TOC_VIEW: {
@@ -1666,6 +1657,9 @@ void LyXFunc::dispatch(FuncRequest const & cmd)
 		case LFUN_WINDOW_CLOSE:
 			BOOST_ASSERT(lyx_view_);
 			BOOST_ASSERT(theApp());
+			// ask the user for saving changes or cancel quit
+			if (!theBufferList().quitWriteAll())
+				break;
 			lyx_view_->close();
 			return;