drawingWidget.h

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#ifndef NSBACI_UI_DRAWINGWIDGET_H
#define NSBACI_UI_DRAWINGWIDGET_H
 
#include <QWidget>
#include <QPainter>
#include <QPixmap>
#include <QColor>
#include <QPoint>
#include <vector>
 
#include "drawingTypes.h"

namespace nsbaci::ui {

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

  ~DrawingWidget() override = default;

  nsbaci::types::Size getCanvasSize() const;

  QSize minimumSizeHint() const override;

  QSize sizeHint() const override;
 
 public slots:
  // ============== Drawing Command Slots ==============

  void onDrawCommand(const nsbaci::types::DrawCommand& command);

  void onDrawRequested(const nsbaci::types::Drawable& drawable);

  void onClearRequested(const nsbaci::types::Color& color);

  void onRefreshRequested();

  void onCanvasSizeChanged(const nsbaci::types::Size& size);
 
  // ============== Direct Drawing Slots ==============

  void setColor(uint8_t r, uint8_t g, uint8_t b, uint8_t a = 255);

  void clear();

  void drawCircle(int32_t centerX, int32_t centerY, int32_t radius,
                  bool filled = false);

  void drawRectangle(int32_t x, int32_t y, int32_t width, int32_t height,
                     bool filled = false);

  void drawTriangle(int32_t x1, int32_t y1, int32_t x2, int32_t y2,
                    int32_t x3, int32_t y3, bool filled = false);

  void drawLine(int32_t x1, int32_t y1, int32_t x2, int32_t y2);

  void drawEllipse(int32_t centerX, int32_t centerY, int32_t radiusX,
                   int32_t radiusY, bool filled = false);

  void drawPixel(int32_t x, int32_t y);

  void drawText(int32_t x, int32_t y, const QString& text,
                int32_t fontSize = 12);

  void setLineWidth(int32_t width);

  void reset();
 
 protected:
  void paintEvent(QPaintEvent* event) override;

  void resizeEvent(QResizeEvent* event) override;
 
 private:
  void drawShapeInternal(const nsbaci::types::Shape& shape,
                         const nsbaci::types::Color& color);

  static QColor toQColor(const nsbaci::types::Color& color);

  void ensureCanvas();
 
  QPixmap canvas_;                        // The drawing buffer
  QColor currentColor_{Qt::black};        // Current drawing color
  QColor backgroundColor_{Qt::white};     // Background color
  int lineWidth_ = 1;                     // Current line width
  nsbaci::types::Size canvasSize_{800, 600};  // Canvas dimensions
};
 
}  // namespace nsbaci::ui
 
#endif  // NSBACI_UI_DRAWINGWIDGET_H