barsdemoview.cpp

VC++ 编程宝典,电子工业出版社,源代码,第三部分

// BarsDemoView.cpp : implementation of the CBarsDemoView class
//

#include "stdafx.h"
#include "BarsDemo.h"

#include "BarsDemoDoc.h"
#include "BarsDemoView.h"

#include "MainFrm.h"

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

/////////////////////////////////////////////////////////////////////////////
// CBarsDemoView

IMPLEMENT_DYNCREATE(CBarsDemoView, CView)

BEGIN_MESSAGE_MAP(CBarsDemoView, CView)
	//{{AFX_MSG_MAP(CBarsDemoView)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CBarsDemoView construction/destruction

CBarsDemoView::CBarsDemoView()
{
}

CBarsDemoView::~CBarsDemoView()
{
}

BOOL CBarsDemoView::PreCreateWindow(CREATESTRUCT& cs)
{
	return CView::PreCreateWindow(cs);
}

/////////////////////////////////////////////////////////////////////////////
// CBarsDemoView drawing

void CBarsDemoView::OnDraw(CDC* pDC)
{
	CBarsDemoDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);

	CWnd *pWnd = pDC->GetWindow();

	// Get a pointer to the frame window.
	CMainFrame *pFrame =
		(CMainFrame *) AfxGetMainWnd();

	// Loop through the list of draw events.
	for( int i=0; i<pFrame->m_nCurrentDrawEvent; i++ ){

		// Copy structure members into local variables
		// for clearer code.
		COLORREF cColor = pFrame->m_DrawEvent[i].cColor;
		int nX1 = pFrame->m_DrawEvent[i].nX1;
		int nY1 = pFrame->m_DrawEvent[i].nY1;
		int nX2 = pFrame->m_DrawEvent[i].nX2;
		int nY2 = pFrame->m_DrawEvent[i].nY2;

		// Create a new brush and pen. Select them
		// into the dc and remember the old
		// pen and brush.
		CBrush *pOldBrush, Brush( cColor );
		CPen *pOldPen, Pen( PS_SOLID, 1, cColor );
		pOldBrush = pDC->SelectObject( &Brush );
		pOldPen = pDC->SelectObject( &Pen );

		// Create a rect object for the
		// rectangle and ellipse operations.
		CRect Rect( nX1, nY1, nX2, nY2 );

		switch( pFrame->m_DrawEvent[i].nOperation ){
			case OPERATION_LINE:
				// Draw a line.
				pDC->MoveTo( nX1, nY1 );
				pDC->LineTo( nX2, nY2 );
				break;
			case OPERATION_RECTANGLE:
				// Draw a rectangle.
				pDC->Rectangle( Rect );
				break;
			case OPERATION_ELLIPSE:
				// Draw an ellipse.
				pDC->Ellipse( Rect );
				break;
			}

		// Select the old pen and brush back
		// into the dc.
		pDC->SelectObject( pOldBrush );
		pDC->SelectObject( pOldPen );

		}

}

/////////////////////////////////////////////////////////////////////////////
// CBarsDemoView diagnostics

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

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

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

/////////////////////////////////////////////////////////////////////////////
// CBarsDemoView message handlers