Gui: add function to observe before changing a property

2020-01-13 02:17:39 +01:00
parent 127ae92e61
commit e5d23469f7
6 changed files with 38 additions and 0 deletions
--- a/src/Gui/ViewProvider.cpp
+++ b/src/Gui/ViewProvider.cpp
@@ -514,6 +514,13 @@ int ViewProvider::getDefaultMode() const {
    return viewOverrideMode>=0?viewOverrideMode:_iActualMode;
 }

+void ViewProvider::onBeforeChange(const App::Property* prop)
+{
+    Application::Instance->signalBeforeChangeObject(*this, *prop);
+
+    App::TransactionalObject::onBeforeChange(prop);
+}
+
 void ViewProvider::onChanged(const App::Property* prop)
 {
    Application::Instance->signalChangedObject(*this, *prop);