标签：des style blog http color 使用 io 文件
完善绘图例子（day06中的），加上保存功能RegisterShellFileTypes();//注册自定义文件类型，双击可直接打开
示例:
新建单文档MFC程序；
添加菜单：
修改字符串表：
ctrl+w 添加消息映射：
在视图类中，加菜单按钮的COMMAND和UPDATE_COMMAND_UI事件，然后视图类添加 WM_LBUTTONDOWN、WM_LBUTTONUP 、M_MOUSEMOVE消息事件。
主要核心代码：
//view的头文件中添加 成员变量和函数声明
public:
CMFCdraw2Doc* GetDocument();
CPoint m_ptBegin;//起点坐标
CPoint m_ptEnd;//终点坐标
UINT m_nType;//类型：1-直线，2-距形，3-圆
BOOL m_bFlag;//是否开始画线
void DrawShape(CDC *pDC, CPoint p1, CPoint p2);
// CMFCdraw2View construction/destruction
CMFCdraw2View::CMFCdraw2View()
{
// TODO: add construction code here
m_nType=0;
m_bFlag=FALSE;
m_ptBegin=m_ptEnd=0;
}
// CMFCdraw2View drawing
void CMFCdraw2View::OnDraw(CDC* pDC)
{
CMFCdraw2Doc* pDoc = GetDocument();
ASSERT_VALID(pDoc);
CBrush *pOldBrush=(CBrush *)
pDC->SelectStockObject(NULL_BRUSH);
for(int i=0;i<pDoc->m_arrShapes.GetSize();i++)
{
CShape *pshape=(CShape*)pDoc->m_arrShapes[i];
switch(pshape->m_nType)
{
case 1:
pDC->MoveTo(pshape->m_ptBegin);
pDC->LineTo(pshape->m_ptEnd);
break;
case 2:
pDC->Rectangle(pshape->m_ptBegin.x,pshape->m_ptBegin.y,
pshape->m_ptEnd.x,pshape->m_ptEnd.y);
break;
case 3:
pDC->Ellipse(pshape->m_ptBegin.x,pshape->m_ptBegin.y,
pshape->m_ptEnd.x,pshape->m_ptEnd.y);
break;
}
}
pDC->SelectObject(pOldBrush);
// TODO: add draw code for native data here
}
void CMFCdraw2View::OnDrawElipse()
{
// TODO: Add your command handler code here
m_nType=3;
}
void CMFCdraw2View::OnDrawLine()
{
// TODO: Add your command handler code here
m_nType=1;
}
void CMFCdraw2View::OnDrawRect()
{
// TODO: Add your command handler code here
m_nType=2;
}
void CMFCdraw2View::OnLButtonDown(UINT nFlags, CPoint point)
{
// TODO: Add your message handler code here and/or call default
// TODO: Add your message handler code here and/or call default
m_bFlag=TRUE;//开始绘图
m_ptBegin=m_ptEnd=point; //确定起点位置
CView::OnLButtonDown(nFlags,point);
}
void CMFCdraw2View::OnLButtonUp(UINT nFlags, CPoint point)
{
// TODO: Add your message handler code here and/or call default
m_bFlag=FALSE;//结束画线
CShape * pshape=new CShape;
pshape->m_ptBegin=m_ptBegin;
pshape->m_ptEnd=m_ptEnd;
pshape->m_nType=m_nType;
CMFCdraw2Doc *pDoc=(CMFCdraw2Doc*)GetDocument();
pDoc->m_arrShapes.Add(pshape);//保存到文档的图形集合中
CView::OnLButtonUp(nFlags, point);
}
void CMFCdraw2View::OnMouseMove(UINT nFlags, CPoint point)
{
// TODO: Add your message handler code here and/or call default
CClientDC dc(this);
if(m_bFlag)
{
//擦线
DrawShape(&dc,m_ptBegin,m_ptEnd);
//画线
DrawShape(&dc,m_ptBegin,point);
//保存终点位置，为擦线准备
m_ptEnd=point;
}
CView::OnMouseMove(nFlags, point);
}
void CMFCdraw2View::DrawShape(CDC *pDC, CPoint p1, CPoint p2)
{
//设置绘图模式，R2_NOT与当前画线处颜色相反
pDC->SetROP2(R2_NOT);
//设置画刷为透明画刷
CBrush *pOldBrush=
(CBrush*)pDC->SelectStockObject(NULL_BRUSH);
switch (m_nType)
{
case 1://直线
pDC->MoveTo(p1);
pDC->LineTo(p2);
break;
case 2://矩形
pDC->Rectangle(p1.x,p1.y,p2.x,p2.y);
break;
case 3://椭圆
pDC->Ellipse(p1.x,p1.y,p2.x,p2.y);
break;
}
//恢复默认画刷
pDC->SelectObject(pOldBrush);
}
void CMFCdraw2View::OnUpdateDrawElipse(CCmdUI* pCmdUI)
{
// TODO: Add your command update UI handler code here
pCmdUI->SetRadio(m_nType==3);//更改选中的状态
}
void CMFCdraw2View::OnUpdateDrawLine(CCmdUI* pCmdUI)
{
// TODO: Add your command update UI handler code here
pCmdUI->SetRadio(m_nType==1);
}
void CMFCdraw2View::OnUpdateDrawRect(CCmdUI* pCmdUI)
{
// TODO: Add your command update UI handler code here
pCmdUI->SetRadio(m_nType==2);
}
//doc头文件添加成员变量和函数声明
public:
CObArray m_arrShapes;
UINT m_nShapeCount;//图形数量
void releaseShapes();
//Doc类cpp中
CMFCdraw2Doc::CMFCdraw2Doc()
{
// TODO: add one-time construction code here
releaseShapes();
}
CMFCdraw2Doc::~CMFCdraw2Doc()
{
releaseShapes();
}
BOOL CMFCdraw2Doc::OnNewDocument()
{
if (!CDocument::OnNewDocument())
return FALSE;
releaseShapes();
// TODO: add reinitialization code here
// (SDI documents will reuse this document)
return TRUE;
}
/////////////////////////////////////////////////////////////////////////////
// CMFCdraw2Doc serialization
void CMFCdraw2Doc::Serialize(CArchive& ar)
{
if (ar.IsStoring())
{
//存储图形数据前，先存储图形数量
ar<<m_arrShapes.GetSize();
for (int i=0;i<m_arrShapes.GetSize();i++)
{
CShape *pShape=(CShape *)m_arrShapes[i];
ar<<pShape;
}
}
else
{
//读取时，先要读取图形数量
ar>>m_nShapeCount;
for (int i=0;i<m_nShapeCount;i++)
{
CShape *pShape=NULL;
ar>>pShape;
m_arrShapes.Add(pShape);
}
}
}
/////////////////////////////////////////////////////////////////////////////
// CMFCdraw2Doc commands
void CMFCdraw2Doc::releaseShapes()
{
for (int i=0;i<m_arrShapes.GetSize();i++)
{
delete m_arrShapes[i];
}
m_arrShapes.RemoveAll();
}
// Shape.h: interface for the CShape class.
//
//////////////////////////////////////////////////////////////////////
#if !defined(CSHAPE_H)
#define CSHAPE_H
#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000
//记录一个形状的类
class CShape : public CObject
{
public:
CShape();
virtual ~CShape();
virtual void Serialize( CArchive& ar );//序列化用的虚函数
public:
CPoint m_ptBegin;//起点
CPoint m_ptEnd;//终点
UINT m_nType;//图形类型
DECLARE_SERIAL(CShape)
};
#endif // !defined(CSHAPE_H)
//CShape.cpp
#include "stdafx.h"
#include "MFCdraw2.h"
#include "CShape.h"
#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif
//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////
IMPLEMENT_SERIAL(CShape,CObject,1)
CShape::CShape()
{
m_ptBegin=m_ptEnd=0;
m_nType=1;//直线
}
CShape::~CShape()
{
}
void CShape::Serialize( CArchive& ar )
{
CObject::Serialize(ar);
if (ar.IsStoring())
{
ar<<m_ptBegin<<m_ptEnd<<m_nType;
}
else
{
ar>>m_ptBegin>>m_ptEnd>>m_nType;
}
}
的单击位置，判断单元格，然后使用当前颜色填充该单元格
【示例稍后补充】
C++MFC编程笔记day07 MFC单文档绘图保存、多文档绘图保存,布布扣,bubuko.com
C++MFC编程笔记day07 MFC单文档绘图保存、多文档绘图保存
标签：des style blog http color 使用 io 文件
原文地址：http://blog.csdn.net/pukuimin1226/article/details/38434063
