MainWindow: Add progress dialog for save process.

src/View/MainWindow.py

@@ -28,12 +28,12 @@ from PyQt5.QtGui import (
 )
 
 from PyQt5.QtCore import (
-    QTranslator, QEvent, QUrl,
+    Qt, QTranslator, QEvent, QUrl,
 )
 from PyQt5.QtWidgets import (
     QMainWindow, QApplication, QAction,
     QFileDialog, QShortcut, QMenu, QToolBar,
-    QMessageBox,
+    QMessageBox, QProgressDialog,
 )
 from PyQt5.uic import loadUi
 
@@ -406,8 +406,21 @@ class ApplicationWindow(QMainWindow, ListedSubWindow, WindowToolKit):
         if self._study.is_saved:
             return
 
+        sql_request_count = self._study.sql_save_request_count()
+        progress = QProgressDialog(
+            "Saving...", "Cancel",
+            0, sql_request_count,
+            parent=self
+        )
+        progress.setWindowModality(Qt.WindowModal)
+
+        progress.setValue(0)
+
         logger.info("Save...")
-        self._study.save()
+        self._study.save(
+            progress=lambda: progress.setValue(progress.value() + 1)
+        )
+        logger.info("Done")
 
     def save_as_study(self):
         """Save current study as new file