www.pudn.com > Chap09.zip > SquaresView.cpp

// SquaresView.cpp : implementation of the CSquaresView class 
// 
 
#include "stdafx.h" 
#include "SdiSquares.h" 
 
#include "SquaresDoc.h" 
#include "SquaresView.h" 
 
#ifdef _DEBUG 
#define new DEBUG_NEW 
#undef THIS_FILE 
static char THIS_FILE[] = __FILE__; 
#endif 
 
///////////////////////////////////////////////////////////////////////////// 
// CSquaresView 
 
IMPLEMENT_DYNCREATE(CSquaresView, CView) 
 
BEGIN_MESSAGE_MAP(CSquaresView, CView) 
	//{{AFX_MSG_MAP(CSquaresView) 
	ON_WM_LBUTTONDOWN() 
	//}}AFX_MSG_MAP 
END_MESSAGE_MAP() 
 
///////////////////////////////////////////////////////////////////////////// 
// CSquaresView construction/destruction 
 
CSquaresView::CSquaresView() 
{ 
	// TODO: add construction code here 
 
} 
 
CSquaresView::~CSquaresView() 
{ 
} 
 
BOOL CSquaresView::PreCreateWindow(CREATESTRUCT& cs) 
{ 
	// TODO: Modify the Window class or styles here by modifying 
	//  the CREATESTRUCT cs 
 
	return CView::PreCreateWindow(cs); 
} 
 
///////////////////////////////////////////////////////////////////////////// 
// CSquaresView drawing 
 
void CSquaresView::OnDraw(CDC* pDC) 
{ 
	CSquaresDoc* pDoc = GetDocument(); 
	ASSERT_VALID(pDoc); 
 
	// 
	// Set the mapping mode to MM_LOENGLISH. 
	// 
	pDC->SetMapMode (MM_LOENGLISH); 
 
	// 
	// Draw the 16 squares. 
	// 
	for (int i=0; i<4; i++) { 
		for (int j=0; j<4; j++) { 
			COLORREF color = pDoc->GetSquare (i, j); 
			CBrush brush (color); 
			int x1 = (j * 100) + 50; 
			int y1 = (i * -100) - 50; 
			int x2 = x1 + 100; 
			int y2 = y1 - 100; 
			CRect rect (x1, y1, x2, y2); 
			pDC->FillRect (rect, &brush); 
		} 
	} 
 
	// 
	// Then the draw the grid lines surrounding them. 
	// 
	for (int x=50; x<=450; x+=100) { 
		pDC->MoveTo (x, -50); 
		pDC->LineTo (x, -450); 
	} 
 
	for (int y=-50; y>=-450; y-=100) { 
		pDC->MoveTo (50, y); 
		pDC->LineTo (450, y); 
	} 
} 
 
///////////////////////////////////////////////////////////////////////////// 
// CSquaresView diagnostics 
 
#ifdef _DEBUG 
void CSquaresView::AssertValid() const 
{ 
	CView::AssertValid(); 
} 
 
void CSquaresView::Dump(CDumpContext& dc) const 
{ 
	CView::Dump(dc); 
} 
 
CSquaresDoc* CSquaresView::GetDocument() // non-debug version is inline 
{ 
	ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CSquaresDoc))); 
	return (CSquaresDoc*)m_pDocument; 
} 
#endif //_DEBUG 
 
///////////////////////////////////////////////////////////////////////////// 
// CSquaresView message handlers 
 
void CSquaresView::OnLButtonDown(UINT nFlags, CPoint point)  
{ 
	CView::OnLButtonDown(nFlags, point); 
 
	// 
	// Convert to click coordinates to MM_LOENGLISH units. 
	// 
	CClientDC dc (this); 
	dc.SetMapMode (MM_LOENGLISH); 
	CPoint pos = point; 
	dc.DPtoLP (&pos); 
 
	// 
	// If a square was clicked, set its color to the current color. 
	// 
	if (pos.x >= 50 && pos.x <= 450 && pos.y <= -50 && pos.y >= -450) { 
		int i = (-pos.y - 50) / 100; 
		int j = (pos.x - 50) / 100; 
		CSquaresDoc* pDoc = GetDocument (); 
		COLORREF clrCurrentColor = pDoc->GetCurrentColor (); 
		pDoc->SetSquare (i, j, clrCurrentColor); 
	} 
}