Qt: fix UI artifacts seen in UAT window on Linux or OSX

The QLabel::clear() method call does not seem to repaint the area on those platforms.
Let's force an update of the widget.

Bug: 11695
Change-Id: I9c708c8537140b26582e4365ceee3271eac23259
Reviewed-on: https://code.wireshark.org/review/11782
Reviewed-by: Pascal Quantin <pascal.quantin@gmail.com>
Petri-Dish: Pascal Quantin <pascal.quantin@gmail.com>
Reviewed-by: Gerald Combs <gerald@wireshark.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/ui/qt/uat_dialog.cpp b/ui/qt/uat_dialog.cpp
index 141e20bfac..157635d50a 100644
--- a/ui/qt/uat_dialog.cpp
+++ b/ui/qt/uat_dialog.cpp
@@ -387,6 +387,7 @@ void UatDialog::enumPrefCurrentIndexChanged(int index)
         ok_button_->setEnabled(true);
         uat_update_record(uat_, rec, TRUE);
     }
+    this->update();
     uat_->changed = TRUE;
 }
 
@@ -440,6 +441,7 @@ void UatDialog::stringPrefTextChanged(const QString &text)
             uat_update_record(uat_, rec, TRUE);
         }
     }
+    this->update();
 
     ok_button_->setEnabled(enable_ok);
     cur_line_edit_->setSyntaxState(ss);
@@ -465,6 +467,7 @@ void UatDialog::stringPrefEditingFinished()
         } else {
             ui->hintLabel->clear();
         }
+        this->update();
     }
 
     updateItem(*item);