[processing] fix app freeze when closing options dialog (fixes #15550)

nirvn · alexbruy · commit 787fecb7a286 · 2017-01-24T15:42:28.000+02:00
(cherry picked from commit 3dcf487)
diff --git a/python/plugins/processing/core/ProcessingConfig.py b/python/plugins/processing/core/ProcessingConfig.py
@@ -293,16 +293,15 @@ def setValue(self, value):
         self.validator(value)
         self.value = value
 
-    def read(self):
-        qsettings = QSettings()
+    def read(self, qsettings=QSettings()):
         value = qsettings.value(self.qname, None)
         if value is not None:
             if isinstance(self.value, bool):
                 value = unicode(value).lower() == unicode(True).lower()
             self.value = value
 
-    def save(self):
-        QSettings().setValue(self.qname, self.value)
+    def save(self, qsettings=QSettings()):
+        qsettings.setValue(self.qname, self.value)
 
     def __str__(self):
         return self.name + '=' + unicode(self.value)
diff --git a/python/plugins/processing/gui/ConfigDialog.py b/python/plugins/processing/gui/ConfigDialog.py
@@ -28,8 +28,7 @@
 import os
 
 from qgis.PyQt import uic
-from qgis.PyQt.QtCore import (Qt,
-                              QEvent)
+from qgis.PyQt.QtCore import Qt, QEvent, QSettings
 from qgis.PyQt.QtWidgets import (QFileDialog,
                                  QDialog,
                                  QStyle,
@@ -264,6 +263,7 @@ def resetMenusToDefaults(self):
 
     def accept(self):
         QApplication.setOverrideCursor(QCursor(Qt.WaitCursor))
+        qsettings = QSettings()
         for setting in self.items.keys():
             if setting.group != menusSettingsGroup or self.saveMenus:
                 if isinstance(setting.value, bool):
@@ -275,7 +275,7 @@ def accept(self):
                         QMessageBox.warning(self, self.tr('Wrong value'),
                                             self.tr('Wrong value for parameter "%s":\n\n%s' % (setting.description, unicode(e))))
                         return
-                setting.save()
+                setting.save(qsettings)
         Processing.updateAlgsList()
         settingsWatcher.settingsChanged.emit()
         updateMenus()
