1.
新建项目，命名为Fill
2.
在FillView.h中声明多边形数组，颜色
与绘制多边形函数DrawPolygon()
并在FillView.cpp中完成对函数的定义
FillView.cpp初始化多边形坐标与颜色
然后在FillView.cpp的OnDraw中添加如下代码，使其在开始时绘制出多边形
写完后的FillView.cpp,FillView.h代码如下
// FillView.cpp : implementation of the CFillView class
//
#include "stdafx.h"
#include "Fill.h"
#include "FillDoc.h"
#include "FillView.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
/
// CFillView
IMPLEMENT_DYNCREATE(CFillView, CView)
BEGIN_MESSAGE_MAP(CFillView, CView)
//{
{AFX_MSG_MAP(CFillView)
// NOTE - the ClassWizard will add and remove mapping macros here.
// DO NOT EDIT what you see in these blocks of generated code!
//}}AFX_MSG_MAP
// Standard printing commands
ON_COMMAND(ID_FILE_PRINT, CView::OnFilePrint)
ON_COMMAND(ID_FILE_PRINT_DIRECT, CView::OnFilePrint)
ON_COMMAND(ID_FILE_PRINT_PREVIEW, CView::OnFilePrintPreview)
END_MESSAGE_MAP()
/
// CFillView construction/destruction
CFillView::CFillView()
{
// TODO: add construction code here
FillColor=RGB(0,0,0);
Point[0]=CPoint(550,400);
Point[1]=CPoint(350,600);
Point[2]=CPoint(250,350);
Point[3]=CPoint(350,50);
Point[4]=CPoint(500,250);
Point[5]=CPoint(600,50);
Point[6]=CPoint(800,450);
}
CFillView::~CFillView()
{
}
BOOL CFillView::PreCreateWindow(CREATESTRUCT& cs)
{
// TODO: Modify the Window class or styles here by modifying
// the CREATESTRUCT cs
return CView::PreCreateWindow(cs);
}
/
// CFillView drawing
void CFillView::OnDraw(CDC* pDC)
{
CFillDoc* pDoc = GetDocument();
ASSERT_VALID(pDoc);
// TODO: add draw code for native data here
DrawPolygon();
}
/
// CFillView printing
BOOL CFillView::OnPreparePrinting(CPrintInfo* pInfo)
{
// default preparation
return DoPreparePrinting(pInfo);
}
void CFillView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
// TODO: add extra initialization before printing
}
void CFillView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
// TODO: add cleanup after printing
}
/
// CFillView diagnostics
#ifdef _DEBUG
void CFillView::AssertValid() const
{
CView::AssertValid();
}
void CFillView::Dump(CDumpContext& dc) const
{
CView::Dump(dc);
}
CFillDoc* CFillView::GetDocument() // non-debug version is inline
{
ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CFillDoc)));
return (CFillDoc*)m_pDocument;
}
#endif //_DEBUG
/
// CFillView message handlers
void CFillView::DrawPolygon()
{
CClientDC dc(this);
int m,n;
for(int j=0;j<=6;j++)
{
m=j,n=j+1;
if(7==n) n=0;
dc.MoveTo(Point[m]);
dc.LineTo(Point[n]);
}
}
// FillView.h : interface of the CFillView class
//
/
#if !defined(AFX_FILLVIEW_H__8D88FCC0_6E53_4D6E_9EBA_CC16041FDEA5__INCLUDED_)
#define AFX_FILLVIEW_H__8D88FCC0_6E53_4D6E_9EBA_CC16041FDEA5__INCLUDED_
#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000
class CFillView : public CView
{
protected: // create from serialization only
CFillView();
DECLARE_DYNCREATE(CFillView)
// Attributes
public:
CFillDoc* GetDocument();
// Operations
public:
void DrawPolygon();
// Overrides
// ClassWizard generated virtual function overrides
//{
{AFX_VIRTUAL(CFillView)
public:
virtual void OnDraw(CDC* pDC); // overridden to draw this view
virtual BOOL PreCreateWindow(CREATESTRUCT& cs);
protected:
virtual BOOL OnPreparePrinting(CPrintInfo* pInfo);
virtual void OnBeginPrinting(CDC* pDC, CPrintInfo* pInfo);
virtual void OnEndPrinting(CDC* pDC, CPrintInfo* pInfo);
//}}AFX_VIRTUAL
// Implementation
public:
virtual ~CFillView();
#ifdef _DEBUG
virtual void AssertValid() const;
virtual void Dump(CDumpContext& dc) const;
#endif
protected:
CPoint Point[7];
COLORREF FillColor;
// Generated message map functions
protected:
//{
{AFX_MSG(CFillView)
// NOTE - the ClassWizard will add and remove member functions here.
// DO NOT EDIT what you see in these blocks of generated code !
//}}AFX_MSG
DECLARE_MESSAGE_MAP()
};
#ifndef _DEBUG // debug version in FillView.cpp
inline CFillDoc* CFillView::GetDocument()
{ return (CFillDoc*)m_pDocument; }
#endif
/
//{
{AFX_INSERT_LOCATION}}
// Microsoft Visual C++ will insert additional declarations immediately before the previous line.
#endif // !defined(AFX_FILLVIEW_H__8D88FCC0_6E53_4D6E_9EBA_CC16041FDEA5__INCLUDED_)
到此可以初步编译运行
3.
添加菜单项目：ID_MENUFillColor
FillColor
声名其对应的函数
FillView.cpp为其添加代码
尝试编译运行，成功
4.
FillView.h添加有关屏幕空间最大坐标的定义
FillView.h声明函数，获取屏幕最大X，Y坐标
在FillView.Cpp中添加其实现
5.
实现核心功能函数：Draw()函数
即多边形边缘填充
首先，在FillView.cpp的代码中
添加如下语句,实现四舍五入
然后在FillView.h中声明函数Draw（）
然后在FillView.cpp中添加对其的实现
void CFillView::Draw()
{
COLORREF CBackColor=RGB(255,255,255);
CClientDC dc(this);
int m,n,ymin,ymax;
double x,y,k;
for(int i=0;i<=6;i++)
{
m=i,n=i+1;
if(7==n) n=0;
k=(double(Point[m].x-Point[n].x))/(Point[m].y-Point[n].y);
if(Point[m].y<Point[n].y)
{
ymin=Point[m].y;
ymax=Point[n].y;
x=Point[m].x;
}
else
{
ymin=Point[n].y;
ymax=Point[m].y;
x=Point[n].x;
}
for(y=ymin;y<ymax;y++)
{
for(int j=ROUND(x);j<MaxX;j++)
{
if(dc.GetPixel(j,ROUND(y))==FillColor)
{
dc.SetPixel(j,ROUND(y),CBackColor);
}
else
{
dc.SetPixel(j,ROUND(y),FillColor);
}
}
x+=k;
}
}
}
6.
整合功能进入菜单项目
添加菜单项目
EdgeFill
ID_MENUEdgeFill
建立其对应的函数
在FillView.cpp中添加其实现
顺利运行
最终FillView.cpp与FileView.h如下
// FillView.cpp : implementation of the CFillView class
//
#include "stdafx.h"
#include "Fill.h"
#include "FillDoc.h"
#include "FillView.h"
#define ROUND(a) int(a+0.5)
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
/
// CFillView
IMPLEMENT_DYNCREATE(CFillView, CView)
BEGIN_MESSAGE_MAP(CFillView, CView)
//{
{AFX_MSG_MAP(CFillView)
ON_COMMAND(ID_MENUFillColor, OnMENUFillColor)
ON_COMMAND(ID_MENUEdgeFill, OnMENUEdgeFill)
//}}AFX_MSG_MAP
// Standard printing commands
ON_COMMAND(ID_FILE_PRINT, CView::OnFilePrint)
ON_COMMAND(ID_FILE_PRINT_DIRECT, CView::OnFilePrint)
ON_COMMAND(ID_FILE_PRINT_PREVIEW, CView::OnFilePrintPreview)
END_MESSAGE_MAP()
/
// CFillView construction/destruction
CFillView::CFillView()
{
// TODO: add construction code here
FillColor=RGB(0,0,0);
Point[0]=CPoint(550,400);
Point[1]=CPoint(350,600);
Point[2]=CPoint(250,350);
Point[3]=CPoint(350,50);
Point[4]=CPoint(500,250);
Point[5]=CPoint(600,50);
Point[6]=CPoint(800,450);
}
CFillView::~CFillView()
{
}
BOOL CFillView::PreCreateWindow(CREATESTRUCT& cs)
{
// TODO: Modify the Window class or styles here by modifying
// the CREATESTRUCT cs
return CView::PreCreateWindow(cs);
}
/
// CFillView drawing
void CFillView::OnDraw(CDC* pDC)
{
CFillDoc* pDoc = GetDocument();
ASSERT_VALID(pDoc);
// TODO: add draw code for native data here
DrawPolygon();
}
/
// CFillView printing
BOOL CFillView::OnPreparePrinting(CPrintInfo* pInfo)
{
// default preparation
return DoPreparePrinting(pInfo);
}
void CFillView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
// TODO: add extra initialization before printing
}
void CFillView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
// TODO: add cleanup after printing
}
/
// CFillView diagnostics
#ifdef _DEBUG
void CFillView::AssertValid() const
{
CView::AssertValid();
}
void CFillView::Dump(CDumpContext& dc) const
{
CView::Dump(dc);
}
CFillDoc* CFillView::GetDocument() // non-debug version is inline
{
ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CFillDoc)));
return (CFillDoc*)m_pDocument;
}
#endif //_DEBUG
/
// CFillView message handlers
void CFillView::GetMaxX()
{
CRect rect;
GetClientRect(rect);
MaxX=rect.right;
}
void CFillView::GetMaxY()
{
CRect rect;
GetClientRect(rect);
MaxY=rect.bottom;
}
void CFillView::Draw()
{
COLORREF CBackColor=RGB(255,255,255);
CClientDC dc(this);
int m,n,ymin,ymax;
double x,y,k;
for(int i=0;i<=6;i++)
{
m=i,n=i+1;
if(7==n) n=0;
k=(double(Point[m].x-Point[n].x))/(Point[m].y-Point[n].y);
if(Point[m].y<Point[n].y)
{
ymin=Point[m].y;
ymax=Point[n].y;
x=Point[m].x;
}
else
{
ymin=Point[n].y;
ymax=Point[m].y;
x=Point[n].x;
}
for(y=ymin;y<ymax;y++)
{
for(int j=ROUND(x);j<MaxX;j++)
{
if(dc.GetPixel(j,ROUND(y))==FillColor)
{
dc.SetPixel(j,ROUND(y),CBackColor);
}
else
{
dc.SetPixel(j,ROUND(y),FillColor);
}
}
x+=k;
}
}
}
void CFillView::DrawPolygon()
{
CClientDC dc(this);
int m,n;
for(int j=0;j<=6;j++)
{
m=j,n=j+1;
if(7==n) n=0;
dc.MoveTo(Point[m]);
dc.LineTo(Point[n]);
}
}
void CFillView::OnMENUFillColor()
{
// TODO: Add your command handler code here
CColorDialog ccd(FillColor);
if(ccd.DoModal()==IDOK)
{
FillColor=ccd.GetColor();
}
}
void CFillView::OnMENUEdgeFill()
{
// TODO: Add your command handler code here
RedrawWindow();
GetMaxX();GetMaxY();
Draw();
}
// FillView.h : interface of the CFillView class
//
/
#if !defined(AFX_FILLVIEW_H__8D88FCC0_6E53_4D6E_9EBA_CC16041FDEA5__INCLUDED_)
#define AFX_FILLVIEW_H__8D88FCC0_6E53_4D6E_9EBA_CC16041FDEA5__INCLUDED_
#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000
class CFillView : public CView
{
protected: // create from serialization only
CFillView();
DECLARE_DYNCREATE(CFillView)
// Attributes
public:
CFillDoc* GetDocument();
// Operations
public:
void DrawPolygon();
void GetMaxX();
void GetMaxY();
void Draw();
// Overrides
// ClassWizard generated virtual function overrides
//{
{AFX_VIRTUAL(CFillView)
public:
virtual void OnDraw(CDC* pDC); // overridden to draw this view
virtual BOOL PreCreateWindow(CREATESTRUCT& cs);
protected:
virtual BOOL OnPreparePrinting(CPrintInfo* pInfo);
virtual void OnBeginPrinting(CDC* pDC, CPrintInfo* pInfo);
virtual void OnEndPrinting(CDC* pDC, CPrintInfo* pInfo);
//}}AFX_VIRTUAL
// Implementation
public:
virtual ~CFillView();
#ifdef _DEBUG
virtual void AssertValid() const;
virtual void Dump(CDumpContext& dc) const;
#endif
protected:
int MaxX,MaxY;
CPoint Point[7];
COLORREF FillColor;
// Generated message map functions
protected:
//{
{AFX_MSG(CFillView)
afx_msg void OnMENUFillColor();
afx_msg void OnMENUEdgeFill();
//}}AFX_MSG
DECLARE_MESSAGE_MAP()
};
#ifndef _DEBUG // debug version in FillView.cpp
inline CFillDoc* CFillView::GetDocument()
{ return (CFillDoc*)m_pDocument; }
#endif
/
//{
{AFX_INSERT_LOCATION}}
// Microsoft Visual C++ will insert additional declarations immediately before the previous line.
#endif // !defined(AFX_FILLVIEW_H__8D88FCC0_6E53_4D6E_9EBA_CC16041FDEA5__INCLUDED_)