Change searchbar background color to red(ish) when no match found

lib/HistorySearch.cpp

@@ -48,12 +48,13 @@ void HistorySearch::search() {
         } else {
             found = search(0, 0, m_startColumn, m_startLine) || search(m_startColumn, m_startLine, -1, m_emulation->lineCount());
         }
-    }
-
-    if (found) {
-        emit matchFound(m_foundStartColumn, m_foundStartLine, m_foundEndColumn, m_foundEndLine);
-    } else {
-        emit noMatchFound();
+   
+        if (found) {
+            emit matchFound(m_foundStartColumn, m_foundStartLine, m_foundEndColumn, m_foundEndLine);
+        } 
+        else {
+            emit noMatchFound();
+        }
     }
 
     deleteLater();

lib/SearchBar.cpp

@@ -67,6 +67,13 @@ void SearchBar::toggleShown()
     isHidden() ? show() : hide();
 }
 
+void SearchBar::noMatchFound()
+{
+    QPalette palette;
+    palette.setColor(widget.searchTextEdit->backgroundRole(), QColor(255, 128, 128));
+    widget.searchTextEdit->setPalette(palette);
+}
+
 void SearchBar::searchTextChanged()
 {
     m_regExp = QRegExp(widget.searchTextEdit->text());
@@ -77,8 +84,13 @@ void SearchBar::searchTextChanged()
     if (! m_matchCaseMenuEntry->isChecked()) {
         m_regExp.setCaseSensitivity(Qt::CaseInsensitive);
     }
-
-    emit search(m_regExp, true, false);
+    
+    clearBackgroundColor();
+    
+    if (!m_regExp.isEmpty()) 
+    {
+        emit search(m_regExp, true, false);
+    }
 }
 
 void SearchBar::keyReleaseEvent(QKeyEvent* keyEvent)
@@ -102,10 +114,20 @@ void SearchBar::keyReleaseEvent(QKeyEvent* keyEvent)
 
 void SearchBar::findNext()
 {
+    clearBackgroundColor();
     emit search(m_regExp, true, true);
 }
 
 void SearchBar::findPrevious()
 {
+    clearBackgroundColor();
     emit search(m_regExp, false, false);
 }
+
+void SearchBar::clearBackgroundColor()
+{
+    QPalette p;
+    p.setColor(QPalette::Base, Qt::white);
+    widget.searchTextEdit->setPalette(p);
+
+}

lib/SearchBar.h

@@ -34,6 +34,7 @@ public:
 
 public slots:
     void toggleShown();
+    void noMatchFound();
 
 signals:
     void search(QRegExp regexp, bool forwards, bool skip);
@@ -45,6 +46,7 @@ private slots:
     void searchTextChanged(); 
     void findNext();
     void findPrevious();
+    void clearBackgroundColor();
 
 private:
     QRegExp m_regExp;

lib/qtermwidget.cpp

@@ -148,6 +148,7 @@ void QTermWidget::search(QRegExp regexp, bool forwards, bool next)
             new HistorySearch(m_impl->m_session->emulation(), regexp, forwards, startColumn, startLine, this);
     connect(historySearch, SIGNAL(matchFound(int, int, int, int)), this, SLOT(matchFound(int, int, int, int)));
     connect(historySearch, SIGNAL(noMatchFound()), this, SLOT(noMatchFound()));
+    connect(historySearch, SIGNAL(noMatchFound()), m_searchBar, SLOT(noMatchFound()));
     historySearch->search();
 }