Backport 217ef5bf3 (#81380

src/frontends/qt4/GuiThesaurus.cpp

@@ -28,6 +28,7 @@
 #include "support/lstrings.h"
 
 #include <QAbstractItemModel>
+#include <QCompleter>
 #include <QHeaderView>
 #include <QLineEdit>
 #include <QPushButton>
@@ -79,6 +80,10 @@ GuiThesaurus::GuiThesaurus(GuiView & lv)
 	languageCO->setModel(language_model);
 	languageCO->setModelColumn(2);
 
+	//bug #8138
+	if (entryCO->completer())
+		entryCO->completer()->setCompletionMode(QCompleter::PopupCompletion);
+
 	bc().setCancel(closePB);
 	bc().setApply(replacePB);
 	bc().addReadOnly(replaceED);

status.20x

@@ -151,6 +151,8 @@ What's new
   The missing screen update could cause either a failure in executing the
   command or could even crash LyX (bugs 6871 and 8119).
 
+- Improve thesaurus dialog completion (bug 8138)
+
 
 * DOCUMENTATION AND LOCALIZATION