codeeditor.h

/*
 * This file is part of ShaderWorkshop (https://github.com/VladimirMakeev/ShaderWorkshop).
 * Copyright (C) 2019 Vladimir Makeev.
 *
 * ShaderWorkshop is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.

 * ShaderWorkshop is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.

 * You should have received a copy of the GNU Lesser General Public License
 * along with ShaderWorkshop.  If not, see <https://www.gnu.org/licenses/>.
 */

#ifndef CODEEDITOR_H
#define CODEEDITOR_H

#include <QPlainTextEdit>

class CodeEditor : public QPlainTextEdit
{
    Q_OBJECT

public:
    explicit CodeEditor(QWidget *parent = Q_NULLPTR);

    void lineNumberAreaPaintEvent(QPaintEvent *event);
    int lineNumberAreaWidth();

    void highlightLine(int line);

protected:
    void resizeEvent(QResizeEvent *e) Q_DECL_OVERRIDE;
    void keyPressEvent(QKeyEvent *e) Q_DECL_OVERRIDE;

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

private:
    QWidget *lineNumberArea;
    QColor lineHighlightColor;
};

#endif // CODEEDITOR_H