Fix for ticket #64.

When quitting with a modified state the user is
prompted as to whether they want to save the project.
Qgis now also captures the window close event and treats it like a
File:Quit menu item.


git-svn-id: http://svn.osgeo.org/qgis/trunk@5445 c8812cc2-4d05-0410-92ff-de0c093fc19c

Author: g_j_m

src/gui/qgisapp.cpp

@@ -2271,8 +2271,11 @@ findLayers_( QString const & fileFilters, list<QDomNode> const & layerNodes )
 
 void QgisApp::fileExit()
 {
-  removeAllLayers();
-  qApp->exit(0);
+  if (saveDirty() != QMessageBox::Cancel)
+  {
+    removeAllLayers();
+    qApp->exit(0);
+  }
 }
 
 
@@ -2662,7 +2665,7 @@ bool QgisApp::addProject(QString projectFile)
 
 
 
-void QgisApp::fileSave()
+bool QgisApp::fileSave()
 {
   // if we don't have a filename, then obviously we need to get one; note
   // that the project file name is reset to null in fileNew()
@@ -2697,7 +2700,7 @@ void QgisApp::fileSave()
     {
       // if they didn't select anything, just return
       // delete saveFileDialog; auto_ptr auto destroys
-      return;
+      return false;
     }
 
     // make sure we have the .qgs extension in the file name
@@ -2746,7 +2749,7 @@ void QgisApp::fileSave()
         Qt::NoButton );
 
   }
-
+  return true;
 } // QgisApp::fileSave
 
 
@@ -4319,7 +4322,8 @@ int QgisApp::saveDirty()
         QMessageBox::Cancel | QMessageBox::Escape);
     if (QMessageBox::Yes == answer )
     {
-      fileSave();
+      if (!fileSave())
+	answer = QMessageBox::Cancel;
     }
   }
 
@@ -4330,6 +4334,15 @@ int QgisApp::saveDirty()
 } // QgisApp::saveDirty()
 
 
+void QgisApp::closeEvent(QCloseEvent* event)
+{
+  // We'll close in our own good time, thank you very much
+  event->ignore();
+  // Do the usual checks and ask if they want to save, etc
+  fileExit();
+}
+
+
 void QgisApp::whatsThis()
 {
   QWhatsThis::enterWhatsThisMode();

src/gui/qgisapp.h

@@ -212,8 +212,8 @@ public slots:
   void saveWindowState();
   //! Restore the window and toolbar state
   void restoreWindowState();
-  //! Save project
-  void fileSave();
+  //! Save project. Returns true if the user selected a file to save to, false if not.
+  bool fileSave();
   //! Save project as
   void fileSaveAs();
   //! Open the project file corresponding to the
@@ -396,8 +396,8 @@ public slots:
   void pasteTransformations();
   //! check to see if file is dirty and if so, prompt the user th save it
   int saveDirty();
-  //! Set the pointer to the splash screen so status messages can be
-
+  //! Have some control over closing of the application
+  virtual void closeEvent(QCloseEvent* event);
 
   /// QgisApp aren't copyable
   QgisApp( QgisApp const & );