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97 lines
2.0 KiB
C++
97 lines
2.0 KiB
C++
#pragma once
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#include "Item.h"
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#include "SpatialIndex.h"
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namespace NItem
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{
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class CItemMeasure
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: public CItem
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{
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public:
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CItemMeasure(CSigmaDoc* ppDoc);
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~CItemMeasure();
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void OnLButtonDblClk(UINT nFlags, CPoint point) override;
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void OnLButtonDown(CDC* pDC, UINT nFlags, CPoint point, int vk) override;
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void OnLButtonUp(CDC* pDC, UINT nFlags, CPoint point, int vk) override;
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int OnMouseMove(CDC* pDC, UINT nFlags, CPoint point) override;
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void OnMouseMoveStatus(CDC* pDC, UINT nFlags, CPoint point, BYTE*& destBuffer, int& destLen) override;
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BOOL OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags) override;
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BOOL OnKeyUp(UINT nChar, UINT nRepCnt, UINT nFlags) override;
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BOOL OnSetCursor(CWnd* pWnd, UINT nHitTest, UINT message) override;
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void OnDraw(CXyDC* pDC) override;
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void OnDraw(CXyDC* pXyDC, CDC* pDC) override;
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void DrawAssistant(CDC* pDC, int mouseX, int mouseY) override;
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void OnOK(void) override;
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void OnCancel(void) override;
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CString GetCurrentInfo() const;
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/**
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* 开启吸附功能
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*
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*/
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void EnableSnap();
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/**
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* 关闭吸附功能
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*
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*/
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void DisableSnap();
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bool IsSnapEnabled() const;
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private:
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void DrawCross(Gdiplus::Graphics& graphics, Gdiplus::PointF center, int length, const Gdiplus::Pen& pen) const;
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/**
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* 将真实坐标转换为屏幕坐标
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*
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* \param realPoint 真实坐标
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* \return 屏幕坐标
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*/
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CPoint GetScreenPoint(const CPoint2D& realPoint) const;
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/**
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* 获取吸附点
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*
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* \param point 当前光标位置，屏幕坐标
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* \return 如果吸附点存在，返回屏幕坐标，否则返回 std::nullopt;
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*/
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std::optional<CPoint2D> GetSnapPoint(const CPoint& point) const;
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/**
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* 当前状态
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*/
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enum class MeasureState { Idle, SelectingStart, SelectingEnd };
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bool m_isSnapEnabled = true;
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// 吸附的正方形范围，这个是屏幕坐标系，不是实际坐标系
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double m_snapRange = 30.0;
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MeasureState m_state = MeasureState::Idle;
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CPoint2D m_startPoint;
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CPoint2D m_endPoint;
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CPoint2D m_prevPoint;
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COLORREF m_penColor = RGB(0, 0, 0);
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int m_penWidth = 1; // 线宽
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std::unique_ptr<CSpatialIndex> m_pSpatialIndex;
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};
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}
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