diff --git a/codeeditor.h b/codeeditor.h
new file mode 100644
index 0000000000000000000000000000000000000000..a00c5498672acf76664e60d9967eccf11fb53131
--- /dev/null
+++ b/codeeditor.h
@@ -0,0 +1,28 @@
+#ifndef CODEEDITOR_H
+#define CODEEDITOR_H
+
+#include <QWidget>
+#include <QPlainTextEdit>
+
+class CodeEditor : public QPlainTextEdit
+{
+    Q_OBJECT
+public:
+   CodeEditor(QWidget *parent = 0);
+
+   void lineNumberAreaPaintEvent(QPaintEvent* event);
+   int lineNumberAreaWidth();
+
+protected:
+   void resizeEvent(QResizeEvent* event) override;
+
+private slots:
+   void updateLineNumberAreaWidth(int newBlockCount);
+   void highlightCurrentLine();
+   void updateLineNumberArea(const QRect& rect, int dy);
+
+private:
+   QWidget *lineNumberArea;
+};
+
+#endif // CODEEDITOR_H
\ No newline at end of file