"Maybe save" message.

--HG--
branch : feature

src/app/tape/tmainwindow.cpp

@@ -120,6 +120,19 @@ void TMainWindow::FileOpen()
     }
 }
 
+//---------------------------------------------------------------------------------------------------------------------
+void TMainWindow::closeEvent(QCloseEvent *event)
+{
+    if (MaybeSave())
+    {
+        event->accept();
+    }
+    else
+    {
+        event->ignore();
+    }
+}
+
 //---------------------------------------------------------------------------------------------------------------------
 void TMainWindow::FileSave()
 {
@@ -495,3 +508,24 @@ bool TMainWindow::SaveMeasurements(const QString &fileName, QString &error)
     }
     return result;
 }
+
+//---------------------------------------------------------------------------------------------------------------------
+bool TMainWindow::MaybeSave()
+{
+    if (this->isWindowModified())
+    {
+        QMessageBox::StandardButton ret;
+        ret = QMessageBox::warning(this, tr("Unsaved changes"), tr("Measurements have been modified.\n"
+                                                             "Do you want to save your changes?"),
+                                   QMessageBox::Save | QMessageBox::Discard | QMessageBox::Cancel);
+        if (ret == QMessageBox::Save)
+        {
+            FileSave();
+        }
+        else if (ret == QMessageBox::Cancel)
+        {
+            return false;
+        }
+    }
+    return true;
+}

src/app/tape/tmainwindow.h

@@ -52,6 +52,9 @@ public slots:
     void FileNew();
     void FileOpen();
 
+protected:
+    virtual void closeEvent(QCloseEvent *event) Q_DECL_OVERRIDE;
+
 private slots:
     void FileSave();
     void FileSaveAs();
@@ -82,6 +85,8 @@ private:
     void MeasurementsWasSaved(bool saved);
     void SetCurrentFile(const QString &fileName);
     bool SaveMeasurements(const QString &fileName, QString &error);
+
+    bool MaybeSave();
 };
 
 #endif // TMAINWINDOW_H

src/app/valentina/mainwindow.cpp

@@ -2437,7 +2437,7 @@ bool MainWindow::MaybeSave()
     if (this->isWindowModified() && guiEnabled)
     {
         QMessageBox::StandardButton ret;
-        ret = QMessageBox::warning(this, tr("Unsaved change"), tr("The pattern has been modified.\n"
+        ret = QMessageBox::warning(this, tr("Unsaved changes"), tr("The pattern has been modified.\n"
                                                              "Do you want to save your changes?"),
                                    QMessageBox::Save | QMessageBox::Discard | QMessageBox::Cancel);
         if (ret == QMessageBox::Save)