drawtestview.cpp

用vc编写的简单的画图程序

// DrawTestView.cpp : implementation of the CDrawTestView class
//

#include "stdafx.h"
#include "DrawTest.h"

#include "DrawTestDoc.h"
#include "DrawTestView.h"

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

/////////////////////////////////////////////////////////////////////////////
// CDrawTestView

IMPLEMENT_DYNCREATE(CDrawTestView, CView)

BEGIN_MESSAGE_MAP(CDrawTestView, CView)
	//{{AFX_MSG_MAP(CDrawTestView)
	ON_COMMAND(IDM_LINTTYPE, OnLinttype)
	ON_COMMAND(IDM_LINEWIDTH, OnLinewidth)
	ON_COMMAND(IDM_LINECOLOR, OnLinecolor)
	ON_WM_LBUTTONDOWN()
	ON_WM_LBUTTONUP()
	//}}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()

/////////////////////////////////////////////////////////////////////////////
// CDrawTestView construction/destruction

CDrawTestView::CDrawTestView()
{
	// TODO: add construction code here
	m_lineType=2;
	m_lineColor=RGB(0,0,255);
	m_lineWidth=1;
	m_fill=FALSE;
}

CDrawTestView::~CDrawTestView()
{
}

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

	return CView::PreCreateWindow(cs);
}

/////////////////////////////////////////////////////////////////////////////
// CDrawTestView drawing

void CDrawTestView::OnDraw(CDC* pDC)
{
	CDrawTestDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);
	// TODO: add draw code for native data here
	int n;
	n=m_obArray.GetSize();
	for(int i=0;i<n;i++)
	{
		((CGraph*)m_obArray.GetAt(i))->Draw(pDC);
	}
}

/////////////////////////////////////////////////////////////////////////////
// CDrawTestView printing

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

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

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

/////////////////////////////////////////////////////////////////////////////
// CDrawTestView diagnostics

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

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

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

/////////////////////////////////////////////////////////////////////////////
// CDrawTestView message handlers

void CDrawTestView::OnLinttype() 
{
	// TODO: Add your command handler code here
	CDlgLinetype dlg;
	m_fill=FALSE;
	if(IDOK==dlg.DoModal())
	{
		m_lineType=dlg.m_lineType;
		switch(m_lineType)
		{
		case 3:
			if(IDOK==MessageBox("需要填充矩形么?","填充矩形?",MB_OKCANCEL))
				m_fill=TRUE;
			break;
		case 4:
			if(IDOK==MessageBox("需要填充椭圆么?","填充椭圆?",MB_OKCANCEL))
				m_fill=TRUE;
			break;
		}
	}
}

void CDrawTestView::OnLinewidth() 
{
	// TODO: Add your command handler code here
	CDlgLinewidth dlg;
	if(IDOK==dlg.DoModal())
		m_lineWidth=dlg.m_lineWidth;
}

void CDrawTestView::OnLinecolor() 
{
	// TODO: Add your command handler code here
	CColorDialog dlg;
	if(IDOK==dlg.DoModal())
	{
		m_lineColor=dlg.GetColor();
	}
}

void CDrawTestView::OnLButtonDown(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default
	m_ptOrg=point;
	CView::OnLButtonDown(nFlags, point);
}

void CDrawTestView::OnLButtonUp(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default
	CClientDC dc(this);
	CBrush* pOldbrush=(CBrush*)dc.SelectStockObject(NULL_BRUSH);
	CPen pen;
	pen.CreatePen(PS_SOLID,m_lineWidth,m_lineColor);
	CPen* pOldpen=dc.SelectObject(&pen);

	switch(m_lineType)
	{
	case 1:
		dc.SetPixel(point,m_lineColor);
		break;
	case 2:
		dc.MoveTo(m_ptOrg);
		dc.LineTo(point);
		break;
	case 3:
		dc.Rectangle(CRect(m_ptOrg,point));
		if(m_fill)
		{
			dc.FillSolidRect(CRect(m_ptOrg,point),m_lineColor);
		}
		break;
	case 4:
		dc.Ellipse(CRect(m_ptOrg,point));
		if(m_fill)
		{
			CBrush pBrush(m_lineColor);
			CRgn rgn;
			rgn.CreateEllipticRgn(m_ptOrg.x,m_ptOrg.y,point.x,point.y);
			dc.FillRgn(&rgn,&pBrush);
		}
		break;
//	default:
//		break;
	}

	dc.SelectObject(pOldpen);
	dc.SelectObject(pOldbrush);
	
	m_ptEnd=point;

	CGraph *pGraph=new CGraph(m_lineType,m_ptOrg,m_ptEnd,m_lineColor,m_lineWidth,m_fill);
	m_obArray.Add(pGraph);
	CView::OnLButtonUp(nFlags, point);
}