mydrawview.cpp

经典C++书籍钱能C++书籍例子代码实例

// MyDrawView.cpp : implementation of the CMyDrawView class
//

#include "stdafx.h"
#include "MyDraw.h"

#include "MyDrawDoc.h"
#include "MyDrawView.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CMyDrawView

IMPLEMENT_DYNCREATE(CMyDrawView, CView)

BEGIN_MESSAGE_MAP(CMyDrawView, CView)
	//{{AFX_MSG_MAP(CMyDrawView)
	ON_COMMAND(ID_COLOR, OnColor)
	ON_COMMAND(ID_ELLIPSE, OnEllipse)
	ON_UPDATE_COMMAND_UI(ID_ELLIPSE, OnUpdateEllipse)
	ON_COMMAND(ID_ELLIRECT, OnEllirect)
	ON_UPDATE_COMMAND_UI(ID_ELLIRECT, OnUpdateEllirect)
	ON_COMMAND(ID_FILL, OnFill)
	ON_UPDATE_COMMAND_UI(ID_FILL, OnUpdateFill)
	ON_COMMAND(ID_LINE, OnLine)
	ON_UPDATE_COMMAND_UI(ID_LINE, OnUpdateLine)
	ON_COMMAND(ID_RECT, OnRect)
	ON_UPDATE_COMMAND_UI(ID_RECT, OnUpdateRect)
	ON_COMMAND(ID_WIDTH1, OnWidth1)
	ON_UPDATE_COMMAND_UI(ID_WIDTH1, OnUpdateWidth1)
	ON_COMMAND(ID_WIDTH2, OnWidth2)
	ON_UPDATE_COMMAND_UI(ID_WIDTH2, OnUpdateWidth2)
	ON_COMMAND(ID_WIDTH3, OnWidth3)
	ON_UPDATE_COMMAND_UI(ID_WIDTH3, OnUpdateWidth3)
	ON_WM_CREATE()
	ON_WM_LBUTTONDOWN()
	ON_WM_MOUSEMOVE()
	ON_WM_LBUTTONUP()
	ON_WM_SETCURSOR()
	//}}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()

/////////////////////////////////////////////////////////////////////////////
// CMyDrawView construction/destruction

CMyDrawView::CMyDrawView()
{
	// TODO: add construction code here
	m_bdoing=FALSE;
	m_type=0;
	m_width=1;
	m_color=RGB(0,0,255);
	m_pmdc=new CDC;
	m_pbmp=new CBitmap;
}

CMyDrawView::~CMyDrawView()
{	delete m_pmdc;
	delete m_pbmp;
}

BOOL CMyDrawView::PreCreateWindow(CREATESTRUCT& cs)
{
	// TODO: Modify the Window class or styles here by modifying
	//  the CREATESTRUCT cs

	return CView::PreCreateWindow(cs);
}

/////////////////////////////////////////////////////////////////////////////
// CMyDrawView drawing

void CMyDrawView::OnDraw(CDC* pDC)
{
	CMyDrawDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);
	// TODO: add draw code for native data here
	CBitmap* poldbmp=m_pmdc->SelectObject(m_pbmp);
	pDC->BitBlt(0,0,m_nmx,m_nmy,m_pmdc,0,0,SRCCOPY);
	m_pmdc->SelectObject(poldbmp);
  
}

/////////////////////////////////////////////////////////////////////////////
// CMyDrawView printing

BOOL CMyDrawView::OnPreparePrinting(CPrintInfo* pInfo)
{
	// default preparation
	return DoPreparePrinting(pInfo);
}

void CMyDrawView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: add extra initialization before printing
}

void CMyDrawView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: add cleanup after printing
}

/////////////////////////////////////////////////////////////////////////////
// CMyDrawView diagnostics

#ifdef _DEBUG
void CMyDrawView::AssertValid() const
{
	CView::AssertValid();
}

void CMyDrawView::Dump(CDumpContext& dc) const
{
	CView::Dump(dc);
}

CMyDrawDoc* CMyDrawView::GetDocument() // non-debug version is inline
{
	ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CMyDrawDoc)));
	return (CMyDrawDoc*)m_pDocument;
}
#endif //_DEBUG

/////////////////////////////////////////////////////////////////////////////
// CMyDrawView message handlers

void CMyDrawView::OnColor() 
{
	CColorDialog dlg;
	dlg.m_cc.Flags |=CC_PREVENTFULLOPEN | CC_RGBINIT;
	dlg.m_cc.rgbResult = m_color;
	if(dlg.DoModal()==IDOK)
	{
		m_color=dlg.GetColor();
	}
}

void CMyDrawView::OnEllipse() 
{
m_type=4;
	
}

void CMyDrawView::OnUpdateEllipse(CCmdUI* pCmdUI) 
{
	pCmdUI->SetCheck(m_type==4);
	
}

void CMyDrawView::OnEllirect() 
{
m_type=3;
	
}

void CMyDrawView::OnUpdateEllirect(CCmdUI* pCmdUI) 
{
	pCmdUI->SetCheck(m_type==3);
	
}

void CMyDrawView::OnFill() 
{
	m_type=0;
	
}

void CMyDrawView::OnUpdateFill(CCmdUI* pCmdUI) 
{
	pCmdUI->SetCheck(m_type==0);
	
}

void CMyDrawView::OnLine() 
{
	m_type=1;
	
}

void CMyDrawView::OnUpdateLine(CCmdUI* pCmdUI) 
{
	pCmdUI->SetCheck(m_type==1);
	
}

void CMyDrawView::OnRect() 
{
m_type=2;
	
}

void CMyDrawView::OnUpdateRect(CCmdUI* pCmdUI) 
{
	pCmdUI->SetCheck(m_type==2);
	
}

void CMyDrawView::OnWidth1() 
{
m_width=1;	// TODO: Add your command handler code here
	
}

void CMyDrawView::OnUpdateWidth1(CCmdUI* pCmdUI) 
{
	pCmdUI->SetCheck(m_width==1);
	
}

void CMyDrawView::OnWidth2() 
{
	m_width=2;// TODO: Add your command handler code here
	
}

void CMyDrawView::OnUpdateWidth2(CCmdUI* pCmdUI) 
{
	pCmdUI->SetCheck(m_width==2);
	
}

void CMyDrawView::OnWidth3() 
{
	m_width=3;// TODO: Add your command handler code here
	
}

void CMyDrawView::OnUpdateWidth3(CCmdUI* pCmdUI) 
{
	pCmdUI->SetCheck(m_width==3);
}

int CMyDrawView::OnCreate(LPCREATESTRUCT lpCreateStruct) 
{
	if (CView::OnCreate(lpCreateStruct) == -1)
		return -1;

	// TODO: Add your specialized creation code here
	m_nmx=GetSystemMetrics(SM_CXSCREEN);
	m_nmy=GetSystemMetrics(SM_CYSCREEN);

	CDC* pDC=GetDC();
	m_pmdc->CreateCompatibleDC(pDC);
	m_pbmp->CreateCompatibleBitmap(pDC,m_nmx,m_nmy);

	CBitmap* pOldbitmap=m_pmdc->SelectObject(m_pbmp);

	CBrush brush;
	brush.CreateStockObject(WHITE_BRUSH);
	CRect rect(-1,-1,m_nmx,m_nmy);
	m_pmdc->FillRect(rect,&brush);
	m_pmdc->SelectObject(pOldbitmap);
	ReleaseDC(pDC);

	return 0;

}

void CMyDrawView::OnLButtonDown(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default
	 if(m_bdoing)	 //如果正在画图，则返回
		return;

	SetCapture();	 //捕获鼠标信息
	m_bdoing=true;	 //画图标识
	m_pnew=point;	 //将当前鼠标点赋给画图的起点m_pnew
	m_pold=point;	 //将当前鼠标点赋给临时点m_pold
	if(m_type==0)	 //如果是填充，则作如下处理
	{
		CBrush* poldbrush;	 //定义保存内存DC中原画刷的指针
		CBitmap* poldbmp;
		CBrush bfill;
		bfill.CreateSolidBrush(m_color);
		poldbrush=m_pmdc->SelectObject(&bfill);
		poldbmp=m_pmdc->SelectObject(m_pbmp);
		m_pmdc->ExtFloodFill(point.x,point.y,m_pmdc->GetPixel(point),FLOODFILLSURFACE);
		Invalidate(FALSE);
		m_pmdc->SelectObject(poldbrush);
		m_pmdc->SelectObject(poldbmp);
		m_bdoing=FALSE;
	}

//	CView::OnLButtonDown(nFlags, point);
}

void CMyDrawView::OnMouseMove(UINT nFlags, CPoint point) 
{
		if(m_bdoing)
	{
		CDC* pDC=GetDC();
		CBitmap* poldbmp=m_pmdc->SelectObject(m_pbmp);
		CPen pen;
		pen.CreatePen(PS_SOLID,m_width,m_color);
		CPen* poldpen=pDC->SelectObject(&pen);
		CBrush* poldbrush=(CBrush*)pDC->SelectStockObject(NULL_BRUSH);
		CRect rectold(m_pold,m_pnew);
		rectold.NormalizeRect();
		rectold.InflateRect(m_width,m_width);
		pDC->BitBlt(rectold.left,rectold.top,rectold.Width(),rectold.Height(),
			m_pmdc,rectold.left,rectold.top,SRCCOPY);
		CRect rectnew(m_pold,point);
		switch(m_type)
		{
		case 1:
			pDC->MoveTo(m_pold);
			pDC->LineTo(point);
			break;
		case 2:
			pDC->Rectangle(rectnew);
			break;
		case 3:
			pDC->RoundRect(m_pold.x,m_pold.y,point.x,point.y,10,10);
			break;
		case 4:
			pDC->Ellipse(rectnew);
			break;
		default:
			break;
		}
		m_pmdc->SelectObject(poldbmp);
		pDC->SelectObject(poldpen);
		pDC->SelectObject(poldbrush);
		ReleaseDC(pDC);
		m_pnew=point;
	}

	
//	CView::OnMouseMove(nFlags, point);
}

void CMyDrawView::OnLButtonUp(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default
		if(m_bdoing)
	{
		m_bdoing=FALSE;
		CBitmap* poldbmp=m_pmdc->SelectObject(m_pbmp);
		CPen pen;
		pen.CreatePen(PS_SOLID,m_width,m_color);
		CPen* poldpen=m_pmdc->SelectObject(&pen);
		CBrush* poldbrush=(CBrush*)m_pmdc->SelectStockObject(NULL_BRUSH);
		CRect rect(m_pnew,m_pold);
		switch(m_type)
		{
		case 1:
			m_pmdc->MoveTo(m_pold);
			m_pmdc->LineTo(point);
			break;
		case 2:
			m_pmdc->Rectangle(rect);
			break;
		case 3:
			m_pmdc->RoundRect(m_pnew.x,m_pnew.y,m_pold.x,m_pold.y,10,10);
			break;
		case 4:
			m_pmdc->Ellipse(rect);
			break;
		default:
			break;
		}
		Invalidate(FALSE);
		m_pmdc->SelectObject(poldbmp);
		m_pmdc->SelectObject(poldpen);
		m_pmdc->SelectObject(poldbrush);
	}
	ReleaseCapture();
	
	//CView::OnLButtonUp(nFlags, point);
}

BOOL CMyDrawView::OnSetCursor(CWnd* pWnd, UINT nHitTest, UINT message) 
{
	// TODO: Add your message handler code here and/or call default
	 switch(m_type)
	{
	case 0:
		::SetCursor(AfxGetApp()->LoadCursor(IDC_CURSOR0));
		break;

	case 1:
		::SetCursor(AfxGetApp()->LoadCursor(IDC_CURSOR1));
		break;

	case 2:
		::SetCursor(AfxGetApp()->LoadCursor(IDC_CURSOR2));
		break;

	case 3:
		::SetCursor(AfxGetApp()->LoadCursor(IDC_CURSOR3));
		break;

	case 4:
		::SetCursor(AfxGetApp()->LoadCursor(IDC_CURSOR4));
		break;

	default:
		CView::OnSetCursor(pWnd, nHitTest, message);
		//::SetCursor(AfxGetApp()->LoadCursor(IDC_ARROW));
		break;
	}
	return TRUE;

//	return CView::OnSetCursor(pWnd, nHitTest, message);
}