#pragma once

#include "CurveEditorBase.h"
#include "HandleDrawer.h"

/**
 * @brief 样条编辑器绘制器
 *
 * 负责控制点、选中高亮、拖拽预览线及 Handle 区域计算。
 */
class SplineEditorRenderer
{
public:
	SplineEditorRenderer(CSigmaDoc* pDoc, HandleDrawer* pHandleDrawer);

	/**
	 * @brief 使用 CDC 绘制所有控制点
	 */
	void DrawHandlesByCDC(CDC* pDC, CCurveEx* pCurve) const;

	/**
	 * @brief 绘制单个 Handle 或高亮当前选中
	 */
	void DrawHandle(CXyDC* pDC, CDC* pScreenDC, CCurveEx* pCurve, int currentHandleIndex) const;

	/**
	 * @brief 绘制指定索引的选中态 Handle
	 */
	void DrawSelectHandle(CDC* pScreenDC, CXyDC* pXyDC, CCurveEx* pCurve, int nHandle, DWORD handleDrawMode) const;

	/**
	 * @brief 绘制拖拽预览线（R2_NOTXORPEN 擦除）
	 */
	void DrawDragPreview(CDC* pScreenDC, CXyDC* pXyDC, const CPointList& newPointList) const;

	/**
	 * @brief 获取指定 Handle 的刷新区域
	 */
	CRect GetRangeWidthIndex(CCurveEx* pCurve, int nIndex, CXyDC* pDC, CSize handleSize) const;

	/**
	 * @brief 首节点使用稍大命中区域
	 */
	CRect GetFirstNodeHandleRectFocus(CPoint point) const;

private:
	CSigmaDoc* m_pDoc;
	HandleDrawer* m_pHandleDrawer;
};