#ifndef BRUSHPAD_H
#define BRUSHPAD_H

#include <QGroupBox>
#include <QPixmap>
#include <QImage>

class BrushPad : public QGroupBox
{
    Q_OBJECT
public:
    explicit BrushPad(QWidget *parent = nullptr);

    void setBrushImage(const QImage &img);   // 实时换笔刷
    void moveBrush(const QPoint &pos);       // 实时移动笔刷
protected:
    void paintEvent(QPaintEvent *) override;
    void resizeEvent(QResizeEvent *) override;
private:
    QPixmap m_canvas;   // 双缓冲画布
    QImage  m_brush;    // 当前笔刷
    QPoint  m_brushPos; // 仅记录最后一次笔刷位置（调试用）
};

#endif // BRUSHPAD_H