Added output panel (for debug info, etc.)

src/qtviewer/ParseIfcFile.h

@@ -1,10 +1,20 @@
 #ifndef PARSEIFCFILE_H
 #define PARSEIFCFILE_H
 
+#include <QObject>
+#include <QString>
 #include <string>
 
-class ParseIfcFile
+class ParseIfcFile : public QObject
 {
+    Q_OBJECT
+
+signals:
+    void parsingInfo(const QString& info);
+
+private:
+    void outputMsg(const std::string& msg);
+
 public:
     ParseIfcFile();
     ~ParseIfcFile();