Changed the blur thing with a simple label

It was a bit buggy and was not blurring all the widgets, or
not reverting the blur properly. Probably best to just show a
label instead.

Still, the proper solution would probably be to do the processing
in a separate thread.

CHANGELOG

@@ -1,7 +1,7 @@
 2.2
 - Added again make install target
 - Ctrl+C in the terminal will terminate the GUI
-- Blurs UI while processing
+- UI indicates ongoing processing with a label
 - Added new optimization
 
 2.1

relational_gui/guihandler.py

@@ -151,8 +151,7 @@ class relForm(QtWidgets.QMainWindow):
 
     def execute(self):
 
-        blur = QtWidgets.QGraphicsBlurEffect()
-        self.setGraphicsEffect(blur)
+        self.ui.stackedWidget.setCurrentIndex(2)
         QtCore.QCoreApplication.processEvents()
 
         try:
@@ -185,7 +184,7 @@ class relForm(QtWidgets.QMainWindow):
             # Sets the result relation name to none
             self.ui.txtResult.setText(u"_last%d" % self.qcounter)
         finally:
-            blur.setBlurRadius(0)
+            self.setMultiline(self.multiline)
 
 
     def showRelation(self, rel):

relational_gui/maingui.ui

@@ -326,6 +326,17 @@
          </item>
         </layout>
        </widget>
+       <widget class="QWidget" name="processing">
+        <layout class="QVBoxLayout" name="verticalLayout_6">
+         <item>
+          <widget class="QLabel" name="label_2">
+           <property name="text">
+            <string>Processing…</string>
+           </property>
+          </widget>
+         </item>
+        </layout>
+       </widget>
       </widget>
      </widget>
     </item>