// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0

#ifndef QPIXELTOOL_H
#define QPIXELTOOL_H

#include <qwidget.h>
#include <qpixmap.h>

QT_BEGIN_NAMESPACE

class QPixelTool : public QWidget
{
    Q_OBJECT
public:
    explicit QPixelTool(QWidget *parent = nullptr);
    ~QPixelTool();

    void setPreviewImage(const QImage &image);

    QSize sizeHint() const override;

public slots:
    void setZoom(int zoom);
    void setGridSize(int gridSize);
    void toggleGrid();
    void toggleFreeze();
    void setZoomVisible(bool visible);
#if QT_CONFIG(clipboard)
    void copyToClipboard();
    void copyColorToClipboard();
#endif
    void saveToFile();
    void increaseGridSize() { setGridSize(m_gridSize + 1); }
    void decreaseGridSize() { setGridSize(m_gridSize - 1); }
    void increaseZoom();
    void decreaseZoom();
    void aboutPixelTool();

protected:
    void timerEvent(QTimerEvent *event) override;
    void paintEvent(QPaintEvent *event) override;
    void keyPressEvent(QKeyEvent *event) override;
    void keyReleaseEvent(QKeyEvent *event) override;
    void resizeEvent(QResizeEvent *event) override;
    void mouseMoveEvent(QMouseEvent *event) override;
    void mousePressEvent(QMouseEvent *event) override;
    void mouseReleaseEvent(QMouseEvent *event) override;
    void contextMenuEvent(QContextMenuEvent *event) override;

private:
    void grabScreen();
    void startZoomVisibleTimer();
    void startGridSizeVisibleTimer();
    QString aboutText() const;

    bool m_freeze = false;
    bool m_displayZoom = false;
    bool m_displayGridSize = false;
    bool m_mouseDown = false;
    bool m_autoUpdate;
    bool m_preview_mode = false;

    int m_gridActive;
    int m_zoom;
    int m_gridSize;
    int m_lcdMode;

    int m_updateId = 0;
    int m_displayZoomId = 0;
    int m_displayGridSizeId = 0;

    QRgb m_currentColor = 0;

    QPoint m_lastMousePos;
    QPoint m_dragStart;
    QPoint m_dragCurrent;
    QPixmap m_buffer;

    QSize m_initialSize;

    QImage m_preview_image;
};

QT_END_NAMESPACE

#endif // QPIXELTOOL_H
