Don't clear lineedit in non normal echo mode when validation is invalid

This fixes a regression introduced with
c09e9f71173a698670d6c728291ee24f53d50800 which caused the lineedit to
clear the whole text when an invalid character was entered into a lineedit
with an echo mode that was not Normal and a validator was set.

Now if undo() is called directly then it will still clear the text as it
is considered to be called as a user. Whereas the validation will take
care of the invalid entry by using internalUndo() as before which avoids
the clearing of the entire text.

Task-number: QTBUG-29318
Change-Id: I5ff5777a75ab864de2217441b5f518f50646bd8f
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@theqtcompany.com>
Reviewed-by: Giuseppe D'Angelo <giuseppe.dangelo@kdab.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/widgets/widgets/qwidgetlinecontrol_p.h b/src/widgets/widgets/qwidgetlinecontrol_p.h
index f21d88177c..49d9413fc0 100644
--- a/src/widgets/widgets/qwidgetlinecontrol_p.h
+++ b/src/widgets/widgets/qwidgetlinecontrol_p.h
@@ -245,7 +245,7 @@ public:
 
     void insert(const QString &);
     void clear();
-    void undo() { internalUndo(); finishChange(-1, true); }
+    void undo();
     void redo() { internalRedo(); finishChange(); }
     void selectWordAtPos(int);