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#include "StdAfx.h"
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#include "MouseToolCut.h"
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#include "GlobalDrawMgr.h"
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#include "Layer.h"
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#include "GlobalFunction.h"
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#include "LogMgr.h"
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#include "ObjPline.h"
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#include "CommandCut.h"
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#include "CommandMgr.h"
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#if 1//排序用比较函数
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//相等返回0， 如果第一个参数优先，返回>0的值， 否则返回小于0的值
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bool CompareDbPointX(Dbxy pt1,Dbxy pt2)
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{
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return pt1.x>pt2.x;
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}
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bool CompareDbPointY(Dbxy pt1,Dbxy pt2)
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{
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return pt1.y>pt2.y;
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}
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#endif
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CMouseToolCut::CMouseToolCut(void)
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{
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}
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CMouseToolCut::~CMouseToolCut(void)
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{
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}
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void CMouseToolCut::OnLButtonDown(UINT nFlags, CPoint point,CClientDC &dc)
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{
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Dbxy pt = gDraw->CPoint2Dbxy(point);
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DbRect rect = gDraw->GetCurPointRect(pt);
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CutLineInRect(rect);
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}
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//剪切rect 中的line
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void CMouseToolCut::CutLineInRect(DbRect &rect)
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{
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CLayer &layer = gLayer;
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if(!layer.HasObjectInRect(rect))
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return;
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//先找到第一个在rect 的obj -----------------------------------------------
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Sptr<CObjBase> pObj = layer.GetFirstObjInRect(rect);
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//获得obj 在rect 中的第一条line -----------------------------------------------
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Dbxy LinePt1,LinePt2;
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GetFirstLineInRect(pObj,rect,LinePt1,LinePt2);
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if(LinePt1.Equal(LinePt2))
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return;
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//获得line 形成的矩形中所有的线段到LineVec -----------------------------------------------
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vector<DbLine> LineVec;
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DbRect LineRect = GetLineRect(LinePt1,LinePt2);
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layer.GetLineInRect(LineRect,LineVec,false);
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//计算所有的交点到PointVec -----------------------------------------------
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vector<Dbxy> PointVec;
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CalAllIntersection(LinePt1,LinePt2,LineRect,LineVec,PointVec);
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//如果一个交点没有则只剩最后一个线段了, 不能修剪
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if(PointVec.empty())
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return;
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//根据交点情况处理obj -----------------------------------------------
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CutObj(LinePt1,LinePt2,pObj,PointVec,rect);
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}
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//获得被切割线段形成的矩形
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DbRect CMouseToolCut::GetLineRect(const Dbxy &LinePt1,const Dbxy &LinePt2)
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{
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double MixGap = 0.01;
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//避免水平或垂直的情况
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Dbxy RectPt1 = LinePt1;
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Dbxy RectPt2 = LinePt2;
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if(IsTwoDbEqual(LinePt1.x,LinePt2.x))
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{
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RectPt1.x -= MixGap;
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RectPt2.x += MixGap;
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}
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if(IsTwoDbEqual(LinePt1.y,LinePt2.y))
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{
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RectPt1.y += MixGap;
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RectPt2.y -= MixGap;
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}
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DbRect LineRect(RectPt1,RectPt2);
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return LineRect;
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}
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//获得obj 在rect 中的第一条line
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void CMouseToolCut::GetFirstLineInRect(Sptr<CObjBase> &pObj,DbRect &rect,Dbxy &LinePt1,Dbxy &LinePt2)
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{
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vector<DbLine> LineVec;
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pObj->GetLineInRect(rect,LineVec);
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LinePt1 = LineVec[0].m_pt1.GetPt();
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LinePt2 = LineVec[0].m_pt2.GetPt();
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}
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//计算所有交点,保存到PointVec 中
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void CMouseToolCut::CalAllIntersection(Dbxy LinePt1,Dbxy LinePt2,DbRect &LineRect,vector<DbLine> &LineVec,vector<Dbxy> &PointVec)
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{
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vector<DbLine>::iterator iter = LineVec.begin();
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vector<DbLine>::iterator iter_end = LineVec.end();
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for(;iter!=iter_end;iter++)
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{
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Dbxy pt3 = (*iter).m_pt1.GetPt();
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Dbxy pt4 = (*iter).m_pt2.GetPt();
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if(pt3.Equal(pt4))//不要处理两个点在一起的线段
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{
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continue;
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}
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if(IsTwoLineIntersect(LinePt1,LinePt2,pt3,pt4))
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{
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//如果相交求出交点
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Dbxy pt = CalIntersection(LinePt1,LinePt2,pt3,pt4);
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//交点在rect 内则加入捕捉点
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if(IsPointInRect(pt,LineRect))
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{
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PointVec.push_back(pt);
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}
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}
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}
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}
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//根据交点来修剪obj
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//rect 是鼠标点的rect 范围
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//pObj 是当前剪切的对象
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//PointVec 是线段交点的容器
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void CMouseToolCut::CutObj(Dbxy LinePt1,Dbxy LinePt2,Sptr<CObjBase> pObj,vector<Dbxy> &PointVec,DbRect &rect)
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{
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//获取离鼠标最近的剪切点-------------------------------------
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Dbxy CutPt1,CutPt2;
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if(GetCutPoint(LinePt1,LinePt2,PointVec,rect,CutPt1,CutPt2)==false)
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{
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return;
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}
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//将obj 剪切为两个部分------------------------------------------
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CObjPline *pObj1 = NULL;
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CObjPline *pObj2 = NULL;
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CutObjExt(LinePt1,LinePt2,pObj,CutPt1,CutPt2,pObj1,pObj2);
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//创建撤销指令-----------------------------------
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m_TmpObjContainer.Clear();
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CreatCommandCut(pObj,pObj1,pObj2);
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GetCurViewPtr()->RefreshView();
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}
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//创建修剪指令
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//pObj 时修剪前obj
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//pObj1，pObj2 是修剪后的obj
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void CMouseToolCut::CreatCommandCut(Sptr<CObjBase> pObj,CObjPline *&pObj1,CObjPline *&pObj2)
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{
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CCommandCut *p = new CCommandCut;
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p->AddOpObj(pObj);
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AddToCmd(pObj1,p);
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AddToCmd(pObj2,p);
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m_TmpObjContainer.AllObjAddToLayer();
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gCommandMgr.AddUndoCommand(p);
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gLayer.DelObj(pObj);
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}
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void CMouseToolCut::AddToCmd(CObjPline *&pObj,CCommandCut *&pCommandCut)
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{
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if(pObj)
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{
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//保存到智能指针
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Sptr<CObjBase> sPtr(pObj);
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m_TmpObjContainer.AddObject(sPtr);
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pCommandCut->AddOpObj(sPtr);
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}
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else
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{
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delete pObj;
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}
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}
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//将obj 剪切为两个部分
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bool CMouseToolCut::CutObjExt(Dbxy LinePt1,Dbxy LinePt2,Sptr<CObjBase> pObj,Dbxy CutPt1,Dbxy CutPt2,CObjPline *&pObj1,CObjPline *&pObj2)
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{
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vector<CDataPoint>&Container = pObj->GetPtContainer();
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int size = Container.size();
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Dbxy NearPt;//第一部分最后的点
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Dbxy FarPt;//第二部分第一个点
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//分割第一部分------------------------------------------------------------
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int i=0;
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for(;i<size;i++)
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{
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Dbxy pt = Container[i].GetPt();
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Dbxy Nextpt = Container[i+1].GetPt();
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//检查是否为当前操作的线段
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if(IsSelLine(LinePt1,LinePt2,pt,Nextpt))
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{
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GetNearFarPoint(CutPt1,CutPt2,pt,NearPt,FarPt);
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//如果剪切点是obj 的端点, 则没有第一部分
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if(i==0 && (pt.Equal(CutPt1) || pt.Equal(CutPt2)))
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{
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i++;//break 了以后i 不会自增
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break;
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}
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}
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if(i==0)//创建第一部分
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{
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pObj1 = new CObjPline;
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//当前点加入第一部分
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CDataPoint DataPoint(Container[i].GetPt());
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DataPoint.SetIsNode(true);
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pObj1->AddDataPoint(DataPoint);
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}
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else
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{
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pObj1->AddDataPoint(Container[i]);
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}
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//如果当前线段为操作线段，结束第一部分
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if(IsSelLine(LinePt1,LinePt2,pt,Nextpt))
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{
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GetNearFarPoint(CutPt1,CutPt2,pt,NearPt,FarPt);
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Dbxy pt = Container[i].GetPt();
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if(!(pt == NearPt))//避免结尾重复的点2015-12-10
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{
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CDataPoint DataPoint(NearPt);
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DataPoint.SetIsNode(true);
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pObj1->AddDataPoint(DataPoint);
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}
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i++;//break 了以后i 不会自增
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break;
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}
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}
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//分割第二部分--------------------------------------------------------------
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if(!(i==size-1 && FarPt.Equal(Container[i].GetPt())))
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{
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bool bflg = true;
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for(;i<size;i++)
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{
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if(bflg)//分割点的第二个点为第二段的起点
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{
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pObj2 = new CObjPline;
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CDataPoint DataPoint(FarPt);
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DataPoint.SetIsNode(true);
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pObj2->AddDataPoint(DataPoint);
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}
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//当前点加入第二部分
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if(i==size-1)//最后一个点是节点
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{
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CDataPoint DataPoint(Container[i].GetPt());
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DataPoint.SetIsNode(true);
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pObj2->AddDataPoint(DataPoint);
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}
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else
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{
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//如果FarPt 等于第一个点则不要重复加入
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if(!(bflg && FarPt.Equal(Container[i].GetPt())))
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{
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pObj2->AddDataPoint(Container[i]);
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}
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}
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bflg = false;
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}
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}
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return true;
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}
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//获取离鼠标最近的剪切点
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bool CMouseToolCut::GetCutPoint(Dbxy LinePt1,Dbxy LinePt2,vector<Dbxy> &PointVec,DbRect &rect,Dbxy &CutPt1,Dbxy &CutPt2)
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{
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//先得到鼠标rect 线段的交点--------------------------------------------------
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Dbxy MousePt = IntersectionOfRectAndLine(LinePt1,LinePt2,rect);
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//计算和MousePt 最近的两个交点----------------------------------------------
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PointVec.push_back(MousePt);
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PointVec.push_back(LinePt1);
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PointVec.push_back(LinePt2);
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if(IsTwoDbEqual(LinePt1.x,LinePt2.x))//垂直的情况单独处理
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{
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//按y 排序
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sort(PointVec.begin(),PointVec.end(),CompareDbPointY);
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}
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else//不垂直
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{
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//按x 排序
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sort(PointVec.begin(),PointVec.end(),CompareDbPointX);
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}
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vector<Dbxy>::iterator MousePtIter = find(PointVec.begin(),PointVec.end(),MousePt);
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//只处理MousePtIter 在中间的情况
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if(MousePtIter==PointVec.end() || MousePtIter==PointVec.end()-1 || MousePtIter==PointVec.begin())
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return false;
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CutPt1 = (*(MousePtIter-1));
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CutPt2 = (*(MousePtIter+1));
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if(CutPt1.Equal(CutPt2))
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return false;
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return true;
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}
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//检查是否为当前操作的线段
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bool CMouseToolCut::IsSelLine(Dbxy LinePt1,Dbxy LinePt2,Dbxy pt,Dbxy Nextpt)
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{
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return ((LinePt1.Equal(pt) && LinePt2.Equal(Nextpt))||(LinePt1.Equal(Nextpt) && LinePt2.Equal(pt)));
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}
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//获得两个点中离pt 较近的点
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void CMouseToolCut::GetNearFarPoint(Dbxy pt1,Dbxy pt2,Dbxy pt,Dbxy &NearPt,Dbxy &FarPt)
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{
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if(CalDistance(pt1,pt)<CalDistance(pt2,pt))
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{
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NearPt = pt1;
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FarPt = pt2;
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}
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else
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{
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NearPt = pt2;
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FarPt = pt1;
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}
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}
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