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#include "stdafx.h"
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#include "ActionRotationItem.h"
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#include "Util.h"
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#include "BlobSerializer.h"
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#include "SigmaDoc.h"
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CActionRotationItem::CActionRotationItem()
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: CActionItem(nullptr, 0)
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{
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}
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CActionRotationItem::CActionRotationItem(CSigmaDoc* ppDoc, UINT actionType, double x, double y, double angle)
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: CActionItem(ppDoc, actionType),
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m_x(x), m_y(y), m_angle(angle)
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{
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}
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CActionRotationItem::CActionRotationItem(CSigmaDoc* ppDoc, UINT actionType, double x, double y, double angle, const CPositionList &elements)
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: CActionItem(ppDoc, actionType),
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m_x(x), m_y(y), m_angle(angle)
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{
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CListAddRange(m_elements, elements);
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}
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void CActionRotationItem::Undo()
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{
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Rotation(-m_angle);
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}
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void CActionRotationItem::Redo()
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{
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Rotation(m_angle);
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}
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void CActionRotationItem::Do()
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{
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Rotation(m_angle);
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}
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void CActionRotationItem::Rotation(double angle)
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{
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// 如果角度为 0，则不需要进行任何旋转
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if (fabs(angle) < std::numeric_limits<double>::epsilon())
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{
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return;
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}
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if (!m_elements.IsEmpty()) // 要旋转的是指定图元
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{
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CPtrList* pValues = GetDoc()->GetDraw()->GetValueList();
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POSITION pos = m_elements.GetHeadPosition();
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while (pos != nullptr)
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{
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POSITION pt = m_elements.GetNext(pos);
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COne* pOne = reinterpret_cast<COne*>(pValues->GetAt(pt));
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if (pOne != nullptr)
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{
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pOne->Rotate(m_x, m_y, angle);
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}
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}
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}
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else // 要旋转的是整个图件的图元
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{
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GetDoc()->GetDraw()->Rotate(m_x, m_y, angle);
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}
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}
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void CActionRotationItem::accept(CActionVisitor& visitor)
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{
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visitor.visit(*this);
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}
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