Visual C++ and MFC Programming 2nd Edition

Visual C++ and MFC Fundamentals Chapter 9: Strings

pDC->SelectObject(pnOld);

pDC->SelectObject(brOld);

}

To control your own unit system, the orientation of the axes or how the application

converts the units used on your application, use either the MM_ISOTROPIC or the

MM_ANISOTROPIC mapping modes. The first thing you should do is to call the

CDC::SetMapMode() member function and specify one of these two constants (either

MM_ISOTROPIC or MM_ANISOTROPIC). Here is an example:

void CExoView::OnDraw(CDC* pDC)

{

CExoDoc* pDoc = GetDocument();

ASSERT_VALID(pDoc);

CPen PenRed(PS_SOLID, 1, RGB(255, 0, 0));

CBrush BrushAqua(RGB(0, 255, 255));

CBrush *brOld;

CPen *pnOld;

pnOld = pDC->SelectObject(&PenRed);

brOld = pDC->SelectObject(&BrushAqua);

pDC->SetMapMode(MM_ISOTROPIC);

pDC->SetViewportOrg(220, 150);

// Draw a square with a red border and an aqua background

pDC->Rectangle(-100, -100, 100, 100);

CPen BluePen(PS_SOLID, 1, RGB(0, 0, 255));

pnOld = pDC->SelectObject(&BluePen);

// Diagonal line at 45 degrees starting at the origin (0, 0)

pDC->MoveTo(0, 0);

pDC->LineTo(120, 120);

pDC->SelectObject(pnOld);

pDC->SelectObject(brOld);

}