绘图程序

开发平台：
Visual C++

GraphicView.cpp：源码内容
							// GraphicView.cpp : implementation of the CGraphicView class
//
#include "stdafx.h"
#include "Graphic.h"
#include "GraphicDoc.h"
#include "GraphicView.h"
#include "SettingDlg.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
/////////////////////////////////////////////////////////////////////////////
// CGraphicView
IMPLEMENT_DYNCREATE(CGraphicView, CView)
BEGIN_MESSAGE_MAP(CGraphicView, CView)
	//{{AFX_MSG_MAP(CGraphicView)
	ON_COMMAND(IDM_DOT, OnDot)
	ON_COMMAND(IDM_LINE, OnLine)
	ON_COMMAND(IDM_RECTANGLE, OnRectangle)
	ON_COMMAND(IDM_ELLIPSE, OnEllipse)
	ON_WM_LBUTTONDOWN()
	ON_WM_LBUTTONUP()
	ON_COMMAND(IDM_SETTING, OnSetting)
	ON_COMMAND(IDM_COLOR, OnColor)
	ON_COMMAND(IDM_FONT, OnFont)
	ON_WM_ERASEBKGND()
	//}}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()
/////////////////////////////////////////////////////////////////////////////
// CGraphicView construction/destruction
CGraphicView::CGraphicView()
{
	// TODO: add construction code here
	m_nDrawType=0;
	m_ptOrigin=0;
	m_nLineWidth=0;
	m_nLineStyle=0;
	m_clr=RGB(255,0,0);
	m_strFontName="";
}
CGraphicView::~CGraphicView()
{
}
BOOL CGraphicView::PreCreateWindow(CREATESTRUCT& cs)
{
	// TODO: Modify the Window class or styles here by modifying
	//  the CREATESTRUCT cs
	return CView::PreCreateWindow(cs);
}
/////////////////////////////////////////////////////////////////////////////
// CGraphicView drawing
void CGraphicView::OnDraw(CDC* pDC)
{
	CGraphicDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);
	// TODO: add draw code for native data here
/*	CBitmap bitmap;
	bitmap.LoadBitmap(IDB_BITMAP1);
	BITMAP bmp;
	bitmap.GetBitmap(&bmp);
	CDC dcCompatible;
	dcCompatible.CreateCompatibleDC(pDC);
	dcCompatible.SelectObject(&bitmap);
	CRect rect;
	GetClientRect(&rect);
//	pDC->BitBlt(0,0,rect.Width(),rect.Height(),&dcCompatible,0,0,SRCCOPY);
	pDC->StretchBlt(0,0,rect.Width(),rect.Height(),&dcCompatible,
		0,0,bmp.bmWidth,bmp.bmHeight,SRCCOPY);*/
	CFont *pOldFont=pDC->SelectObject(&m_font);
	pDC->TextOut(0,0,m_strFontName);
	pDC->SelectObject(pOldFont);
}
/////////////////////////////////////////////////////////////////////////////
// CGraphicView printing
BOOL CGraphicView::OnPreparePrinting(CPrintInfo* pInfo)
{
	// default preparation
	return DoPreparePrinting(pInfo);
}
void CGraphicView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: add extra initialization before printing
}
void CGraphicView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: add cleanup after printing
}
/////////////////////////////////////////////////////////////////////////////
// CGraphicView diagnostics
#ifdef _DEBUG
void CGraphicView::AssertValid() const
{
	CView::AssertValid();
}
void CGraphicView::Dump(CDumpContext& dc) const
{
	CView::Dump(dc);
}
CGraphicDoc* CGraphicView::GetDocument() // non-debug version is inline
{
	ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CGraphicDoc)));
	return (CGraphicDoc*)m_pDocument;
}
#endif //_DEBUG
/////////////////////////////////////////////////////////////////////////////
// CGraphicView message handlers
void CGraphicView::OnDot() 
{
	// TODO: Add your command handler code here
	m_nDrawType=1;
}
void CGraphicView::OnLine() 
{
	// TODO: Add your command handler code here
	m_nDrawType=2;
}
void CGraphicView::OnRectangle() 
{
	// TODO: Add your command handler code here
	m_nDrawType=3;
}
void CGraphicView::OnEllipse() 
{
	// TODO: Add your command handler code here
	m_nDrawType=4;
}
void CGraphicView::OnLButtonDown(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default
	m_ptOrigin=point;
	CView::OnLButtonDown(nFlags, point);
}
void CGraphicView::OnLButtonUp(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default
	CClientDC dc(this);
	CPen pen(m_nLineStyle,m_nLineWidth,m_clr);
	dc.SelectObject(&pen);
	CBrush *pBrush=CBrush::FromHandle((HBRUSH)GetStockObject(NULL_BRUSH));
	dc.SelectObject(pBrush);
	switch(m_nDrawType)
	{
	case 1:
		dc.SetPixel(point,m_clr);
		break;
	case 2:
		dc.MoveTo(m_ptOrigin);
		dc.LineTo(point);
		break;
	case 3:
		dc.Rectangle(CRect(m_ptOrigin,point));
		break;
	case 4:
		dc.Ellipse(CRect(m_ptOrigin,point));
		break;
	}
	CView::OnLButtonUp(nFlags, point);
}
void CGraphicView::OnSetting() 
{
	// TODO: Add your command handler code here
	CSettingDlg dlg;
	dlg.m_nLineWidth=m_nLineWidth;
	dlg.m_nLineStyle=m_nLineStyle;
	dlg.m_clr=m_clr;
	if(IDOK==dlg.DoModal())
	{
		m_nLineWidth=dlg.m_nLineWidth;
		m_nLineStyle=dlg.m_nLineStyle;
	}
}
void CGraphicView::OnColor() 
{
	// TODO: Add your command handler code here
	CColorDialog dlg;
	dlg.m_cc.Flags|=CC_RGBINIT | CC_FULLOPEN;
	dlg.m_cc.rgbResult=m_clr;
	if(IDOK==dlg.DoModal())
	{
		m_clr=dlg.m_cc.rgbResult;
	}
}
void CGraphicView::OnFont() 
{
	// TODO: Add your command handler code here
	CFontDialog dlg;
	if(IDOK==dlg.DoModal())
	{
		if(m_font.m_hObject)
			m_font.DeleteObject();
		m_font.CreateFontIndirect(dlg.m_cf.lpLogFont);
		m_strFontName=dlg.m_cf.lpLogFont->lfFaceName;
		Invalidate();
	}
}
BOOL CGraphicView::OnEraseBkgnd(CDC* pDC) 
{
	// TODO: Add your message handler code here and/or call default
	CBitmap bitmap;
	bitmap.LoadBitmap(IDB_BITMAP1);
	BITMAP bmp;
	bitmap.GetBitmap(&bmp);
	CDC dcCompatible;
	dcCompatible.CreateCompatibleDC(pDC);
	dcCompatible.SelectObject(&bitmap);
	CRect rect;
	GetClientRect(&rect);
//	pDC->BitBlt(0,0,rect.Width(),rect.Height(),&dcCompatible,0,0,SRCCOPY);
	pDC->StretchBlt(0,0,rect.Width(),rect.Height(),&dcCompatible,
		0,0,bmp.bmWidth,bmp.bmHeight,SRCCOPY);
	return TRUE;
//	return CView::OnEraseBkgnd(pDC);
}

						