falkonOfficial/src/lib/tools/plaineditwithlines.h

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/* ============================================================
* QupZilla - WebKit based browser
* Copyright (C) 2010-2012  David Rosca <nowrep@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program.  If not, see <http://www.gnu.org/licenses/>.
* ============================================================ */
#ifndef PLAINEDITWITHLINES_H
#define PLAINEDITWITHLINES_H

#include <QPlainTextEdit>

#include "qz_namespace.h"

class QPaintEvent;
class QResizeEvent;
class QSize;
class QWidget;

class LineNumberArea;


class QT_QUPZILLA_EXPORT PlainEditWithLines : public QPlainTextEdit
{
    Q_OBJECT

public:
    explicit PlainEditWithLines(QWidget* parent = 0);

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

    void setShowingCursor(bool show);
    bool isShowingCursor() const;

    void setReadOnly(bool ro);

public slots:
    void goToLine(int line);

protected:
    void resizeEvent(QResizeEvent* event);

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

private:
    QWidget* m_lineNumberArea;

    bool m_isShowingCursor;
    QPair<int, int> m_countCache;
};


class QT_QUPZILLA_EXPORT LineNumberArea : public QWidget
{
public:
    explicit LineNumberArea(PlainEditWithLines* editor);

    QSize sizeHint() const;

protected:
    void paintEvent(QPaintEvent* event);

private:
    PlainEditWithLines* m_codeEditor;
};

#endif // PLAINEDITWITHLINES_H