codeeditorwidget.h

#ifndef CODEEDITOR_H
#define CODEEDITOR_H

#include <QPlainTextEdit>
#include <QObject>

class QPaintEvent;
class QResizeEvent;
class QSize;

#include <QWidget>

class CodeEditorWidget : public QWidget, public QPlainTextEdit
{
    Q_OBJECT
public:
    explicit CodeEditorWidget(QWidget *parent = 0);
    void lineNumberAreaPaintEvent(QPaintEvent *event);
    int lineNumberAreaWidth();

protected:
    void resizeEvent(QResizeEvent *event) Q_DECL_OVERRIDE;

private slots:
    void updateLineNumberAreaWidth(int newBlockCount);
    void highlightCurrentLine();
    void updateLineNumberArea(const QRect &, int);

private:
    QWidget *lineNumberArea;

signals:

public slots:
};

#endif // CODEEDITORWIDGET_H