Always redraw the complete control when an input event comes in.

The problem here is that a pre-edit string won't be detected by
updateDisplayText(), so the control thinks nothing has changed when
a new pre-edit string is set.

Reviewed-By: Simon Hausmann
(cherry picked from commit 16f30906f6eea3e00351478555f153697a6e186d)

2 files changed, 4 insertions, 4 deletions

diff --git a/src/gui/widgets/qlinecontrol.cpp b/src/gui/widgets/qlinecontrol.cpp
index db099e8a5b..9ec0feb851 100644
--- a/src/gui/widgets/qlinecontrol.cpp
+++ b/src/gui/widgets/qlinecontrol.cpp
@@ -65,7 +65,7 @@ QT_BEGIN_NAMESPACE
     Updates the display text based of the current edit text
     If the text has changed will emit displayTextChanged()
 */
-void QLineControl::updateDisplayText()
+void QLineControl::updateDisplayText(bool forceUpdate)
 {
     QString orig = m_textLayout.text();
     QString str;
@@ -102,7 +102,7 @@ void QLineControl::updateDisplayText()
     m_textLayout.endLayout();
     m_ascent = qRound(l.ascent());
 
-    if (str != orig)
+    if (str != orig || forceUpdate)
         emit displayTextChanged(str);
 }
 
@@ -476,7 +476,7 @@ void QLineControl::processInputMethodEvent(QInputMethodEvent *event)
         }
     }
     m_textLayout.setAdditionalFormats(formats);
-    updateDisplayText();
+    updateDisplayText(/*force*/ true);
     if (cursorPositionChanged)
         emitCursorPositionChanged();
     if (isGettingInput)
diff --git a/src/gui/widgets/qlinecontrol_p.h b/src/gui/widgets/qlinecontrol_p.h
index d6f270541e..3f1bc2c605 100644
--- a/src/gui/widgets/qlinecontrol_p.h
+++ b/src/gui/widgets/qlinecontrol_p.h
@@ -239,7 +239,7 @@ private:
     void init(const QString &txt);
     void removeSelectedText();
     void internalSetText(const QString &txt, int pos = -1, bool edited = true);
-    void updateDisplayText();
+    void updateDisplayText(bool forceUpdate = false);
 
     void internalInsert(const QString &s);
     void internalDelete(bool wasBackspace = false);