Fix #455 (Recheck is enabled when no previous results available)

http://sourceforge.net/apps/trac/cppcheck/ticket/455

gui/mainwindow.cpp

@@ -89,6 +89,7 @@ MainWindow::MainWindow() :
 
     mUI.mActionClearResults->setEnabled(false);
     mUI.mActionSave->setEnabled(false);
+    mUI.mActionRecheck->setEnabled(false);
 
 
 
@@ -419,7 +420,10 @@ void MainWindow::EnableCheckButtons(bool enable)
 {
     mUI.mActionStop->setEnabled(!enable);
     mUI.mActionCheckFiles->setEnabled(enable);
+
+    if (!enable || mThread->HasPreviousFiles())
         mUI.mActionRecheck->setEnabled(enable);
+
     mUI.mActionCheckDirectory->setEnabled(enable);
 }
 

gui/threadhandler.cpp

@@ -166,3 +166,10 @@ void ThreadHandler::SaveSettings(QSettings &settings)
     settings.setValue(SETTINGS_CHECK_THREADS, mThreads.size());
 }
 
+bool ThreadHandler::HasPreviousFiles() const
+{
+    if (mLastFiles.size() > 0)
+        return true;
+
+    return false;
+}

gui/threadhandler.h

@@ -96,6 +96,13 @@ public:
     */
     bool IsChecking() const;
 
+    /**
+    * @brief Have we checked files already?
+    *
+    * @return true check has been previously run and recheck can be done
+    */
+    bool HasPreviousFiles() const;
+
 signals:
     /**
     * @brief Signal that all threads are done