我要写一个类似CAD的软件

曾经有过累似想法，但是没有实施。
当时我想的通过GDI绘图实现，不论是器件也好，连接线也好都是用基本的GDI函数来画的，针对每个器件记录好位置、线宽、颜色及作图步骤，这样可以保存到文件中，也可从文件读取。
比较重要是如何处理好缩放及拖动，以及各个器件的同步。原则上来说这个方法可行。

我现在用的是一套SDI单文档的框架,自己加了一套可自动缩动的窗口,实现为使用者提供器件选择,然View里在OnDraw里面调用自己写的一个绘制点阵的方法,但是点阵坐标暂时还没有存储起来,毕竟写这个我还只花了十五天左右的时间,没时间太完善,项目又催得紧,大虾帮忙啊

我也是考虑到缩放的问题才没想到有什么好的方法去解决,我目前是用的是vector,做为器件的容器,然后使用多态的方式来存储器件对象指针,结果用vector也遇到了问题,用push_back方法追回成员的时候,竟然只能加32个,加多了就报错

不可能啊，vector怎么会有这种限制？

//===父类的声明==============================================================
class CShape  //器件形状  父类
{
public:
//virtual int  CheckAfoul();///检测碰撞
void SetEndPoint(const int x, const int y);
void SetEndPoint(const CPoint * p);
CPoint * GetCoord2();
void SetCoord(const CPoint *p);
CPoint * GetCoord();
void SetCoord(const int  m_x, const int m_y);
int GetType();
void SetType(int Type);
BOOL m_DrawOrNot ;//是否绘制
CShape();
virtual ~CShape();
protected:
CPoint P_Star; // 记忆的点应为器件点表中相对坐标点  起始点
CPoint P_End;// 记忆的点应为器件点表中相对坐标点  结束点
int m_Type;
};
//====出错的地方============================================================
vector <CShape *> m_spArr;
void CUIView::drawToCanvas( CShape *pShape)
{
ASSERT(pShape   !=   NULL);

m_spArr.push_back(pShape);
}

//===完整的声明代码================================================
#include <vector>
using namespace std;
class CShape  //器件形状  父类
{
public:
//virtual int  CheckAfoul();///检测碰撞
void SetEndPoint(const int x, const int y);
void SetEndPoint(const CPoint * p);
CPoint * GetCoord2();
void SetCoord(const CPoint *p);
CPoint * GetCoord();
void SetCoord(const int  m_x, const int m_y);
int GetType();
void SetType(int Type);
BOOL m_DrawOrNot ;//是否绘制
CShape();
virtual ~CShape();
protected:
CPoint P_Star; // 记忆的点应为器件点表中相对坐标点  起始点
CPoint P_End;// 记忆的点应为器件点表中相对坐标点  结束点
int m_Type;
};class CLine :public CShape   //连接线对象
{
public:
int x_Star;
int y_Star;
int x_End;
int y_End;
int m_x1;
int m_x2;
int m_y1;
int m_y2;
int x1;
int y1;
int x2;
int y2; void DrawLine(CDC *pDC, int m_Unit , int nChar, int Val);
CLine();
virtual ~CLine();
};class CControl :public CShape  //控制器对象
{
public:
void  GetFrame(CPoint * pStar, CPoint * pEnd);
int m_x1;
int m_x2;
int m_y1;
int m_y2;
int x1;
int y1; void DrawControl(CDC *pDC, int m_Unit, int nChar, int Val);
CControl();
virtual ~CControl();
};
class CPointRay :public CShape   //灯点对象   //灯点必需有连接线连接控制器端口才可以被点亮
{
public:
typedef struct _conn {
  BOOL b_Conn;
  DWORD m_Number;
  DWORD m_port;
public:
void SetUpLine(CLine * pLine);
} CONN;
CLine * LineToUp;
CLine * LineToDown;

void SetUpLine(CLine * pLine);
CLine * GetUpLine();
void SetDownLine(CLine * pLine);
CLine * GetDownLine(); int m_x1;
int m_x2;
int m_y1;
int m_y2;
int x1;
int y1;
CONN  type_conn;
void DrawPoint(CDC * pDC, int m_Unit, int nChar, int Val);
CPointRay();
virtual ~CPointRay();};//==完整CShape及子类实现代码============================
CShape::CShape():m_DrawOrNot(true)
{
P_Star.x = -1;
P_Star.y = -1;
}CShape::~CShape()
{}void CShape::SetType(int Type)
{
m_Type = Type;
}int CShape::GetType()
{
return m_Type;
}void CShape::SetCoord(const int m_x, const int m_y)
{
P_Star.x = m_x;}CPoint * CShape::GetCoord()
{
return &P_Star;
}void CShape::SetCoord(const  CPoint * p)
{
P_Star = *p;
}CPoint * CShape::GetCoord2()
{
return &P_End;
}
//==============================================================================================================CPointRay::CPointRay()
{
m_x1 = 0;
m_x2 = 0;
m_y1 = 0;
m_y2 = 0;
x1 = 0;
y1 = 0;
type_conn.b_Conn = FALSE;
type_conn.m_Number = -1;
type_conn.m_port = -1;
LineToUp = NULL;
LineToDown = NULL;
}CPointRay::~CPointRay()
{}void CPointRay::DrawPoint(CDC *pDC, int m_Unit, int nChar, int Val)//m_Unit  点与点之间的单位值
{
switch(nChar)
{
case 37:
x1 = P_Star.x + Val;
break;
case 38:
y1 = P_Star.y + Val;
break;
case 39:
x1 = P_Star.x + Val;
break;
case 40:
y1 = P_Star.y + Val;
break;
default:
x1 = P_Star.x;
y1 = P_Star.y; } int m_x1 = x1*m_Unit  - (int)((m_Unit) / 5);
int m_y1 = y1*m_Unit - (int)((m_Unit) / 5);
int m_x2 = x1*m_Unit + (int)((m_Unit) / 5);
int m_y2 = y1*m_Unit + (int)((m_Unit) / 5);
CPen pen;//(PS_SOLID, 2, RGB(255,255,128));
pen.CreatePen(PS_SOLID, (int)((m_Unit + 1 )), RGB(255,255,128));

HPEN poldPen = (HPEN)pDC->SelectObject (&pen);// pDC->SetPixel(P_Star , RGB(255,255,128));
//pDC->FillSolidRect(m_x1, m_y1, m_x2, m_y2, RGB(10,10,10));
pDC->Arc(m_x1, m_y1, m_x2, m_y2, m_x2, P_Star.y, m_x2, P_Star.y);

pDC->SelectObject(&poldPen);
// //pDC->DrawEdge(
}void CPointRay::SetUpLine(CLine * pLine)
{
LineToUp = pLine;
}void CPointRay::SetDownLine(CLine * pLine)
{
LineToDown = pLine;
}CLine * CPointRay::GetUpLine()
{
return LineToUp;
}CLine * CPointRay::GetDownLine()
{
return LineToDown;
}//================================================================================================================CLine::CLine()
{
m_x1 = 0;
m_x2 = 0;
m_y1 = 0;
m_y2 = 0;
x1 = 0;
y1 = 0;}CLine::~CLine()
{}
/*
void CLine::GetFrame(CPoint *pStar, CPoint *pEnd)
{
pStar = NULL;
pEnd  = NULL;
}
*/
void CLine::DrawLine(CDC *pDC, int m_Unit, int nChar, int Val)//m_Unit  点与点之间的单位值
{
switch(nChar)
{
case 37:
x1 = P_Star.x + Val;
x2 = P_End.x + Val;
break;
case 38:
y1 = P_Star.y + Val;
y2 = P_End.y + Val;
break;
case 39:
x1 = P_Star.x + Val;
x2 = P_End.x + Val;
break;
case 40:
y1 = P_Star.y + Val;
y2 = P_End.y + Val;
break;
default:
x1 = P_Star.x;
y1 = P_Star.y;
x2 = P_End.x;
y2 = P_End.y; }
CPen pen;//(PS_SOLID, 2, RGB(255,255,128));
pen.CreatePen(PS_SOLID, 1, RGB(255,255,128));

HPEN poldPen = (HPEN)pDC->SelectObject (&pen); pDC->MoveTo(x1*m_Unit, y1*m_Unit);
pDC->LineTo(x2*m_Unit,  y2*m_Unit); pDC->SelectObject(&poldPen);
//pDC->DrawEdge(
}//================================================================================================================CControl::CControl()
{
m_x1 = 0;
m_x2 = 0;
m_y1 = 0;
m_y2 = 0;
x1 = 0;
y1 = 0;}CControl::~CControl()
{}void CControl::DrawControl(CDC *pDC, int m_Unit, int nChar, int Val)//m_Unit  点与点之间的单位值
{
///////////////////////////////////////////////////////////////////////////////////

switch(nChar)
{
case 37:
x1 = P_Star.x + Val;
break;
case 38:
y1 = P_Star.y + Val;
break;
case 39:
x1 = P_Star.x + Val;
break;
case 40:
y1 = P_Star.y + Val;
break;
default:
x1 = P_Star.x;
y1 = P_Star.y; } m_x1 = x1*m_Unit - ( 8 * m_Unit + (m_Unit / 2) );
m_y1 = y1*m_Unit - m_Unit  ;
m_x2 = x1*m_Unit + ( 7 * m_Unit + (m_Unit / 2) );
m_y2 = y1*m_Unit + m_Unit ;
pDC->Rectangle(m_x1, m_y1, m_x2, m_y2);
CBrush m_brushBackground;
m_brushBackground.CreateSolidBrush(RGB(250, 250, 250)); ///创建位图画刷
CRect   rect;
rect.bottom = m_y2;
rect.right  = m_x2;
rect.top = m_y1;
rect.left = m_x1; pDC->Rectangle(&rect);
pDC->FillRect(&rect , &m_brushBackground);
////////////////////////////////////////////////////////////////////////////////
CPointRay  m_pointRay;
m_y1 = m_y2 + m_Unit;
for(int i = 0; i < 16;i++)
{
CPen pen(PS_SOLID, 1, RGB(255,255,128));
//pen.CreatePen(PS_SOLID, 1, RGB(255,255,128));

HPEN poldPen = (HPEN)pDC->SelectObject (&pen); m_x2 = m_x1 + i * (m_Unit);
pDC->MoveTo(m_x2, m_y1);
pDC->LineTo(m_x2, m_y2);
pDC->SelectObject(&poldPen); m_pointRay.SetCoord(m_x1, m_y1);
//m_pointRay.SetCoord_Y(m_y1);
m_pointRay.DrawPoint(pDC,m_Unit, nChar , Val);
} //pDC->DrawEdge(
}void  CControl::GetFrame(CPoint * pStar, CPoint * pEnd)
{ pStar->x = P_Star.x - 8;
pStar->y = P_Star.y - 1; pEnd->x = P_Star.x + 7;
pEnd->y = P_Star.y + 2;
return;
}void CShape::SetEndPoint(const int x, const int y)
{
P_End.x = x;
P_End.y = y;
}void CShape::SetEndPoint(const CPoint * p)
{
P_End = *p;
}
void CPointRay::_conn::SetUpLine(CLine *pLine)
{}

我在网上查的,一般是说指针没有初始化,但我每个指针都有初始化,至于指针越界,我也是这样怀疑的,但始终找不到相关代码,因为我的每一个即将压入的对象指针都是在push_back前才new的

我调试到系统库里,竟然是这里出的错,
文件名:AFXMEM.CPP函数名:void* __cdecl operator new(size_t nSize)出错代码行:pResult = _malloc_dbg(nSize, _NORMAL_BLOCK, NULL, 0);

release版,放第一个器件就报错了

我检查了,错误一直只出现在push_back这个函数上

快点阿最好跨平台、开源，支持linux我现在就等这个出来
每次使用autoCAD都要切换到瘟到死windows server2003

m_spArr还有其他的相关操作吗

CShape *pSP = NULL; for(vector<CShape *>::const_iterator it=m_spArr.begin(); it!=m_spArr.end(); ++it)
{ pSP = (CShape *)(* it);
if(pSP->m_DrawOrNot)
{
switch(pSP->GetType())
{
case 1:
((CPointRay *)(pSP))->DrawPoint(pDC, m_nDefaultThickness *10, m_nChar, nChangVal);
break;
case 2:
((CControl *)(pSP))->DrawControl(pDC, m_nDefaultThickness *10, m_nChar, nChangVal);
break;
case 3:
((CLine *)(pSP))->DrawLine(pDC, m_nDefaultThickness *10, m_nChar, nChangVal);
break; }
} }
pSP = NULL;
这是读取以后绘制操作
m_spArr.clear();
删除操作
还有一个删除操作跟读取类似
然后就是push_back
再没有别的操作了

调试易

我要写一个类似CAD的软件

解决方案 »