Paint back color of CScrollView derived class.

[MikeB]

I am using a memory dc to do the drawing, therefore, I override OnEraseBkgnd(...) and return FALSE. In the Ondraw(...) function for my
CScrollView class, I attempt to repaint the background color to gray.

Why does it not get painted.

void CTaskPlan::OnDraw(CDC* pDC)
{
	QBufferDC dc(pDC, SRCCOPY);

	CRect rcClient;
	GetClientRect(&rcClient);
	dc.FillSolidRect(&rcClient, RGB(128,128,128));
	m_Pages[0].OnDraw(&dc);
 }

The page gets drawn so I know the dc is good. But the background color is not set.

Any ideas?

Mike B

[kuphryn]

inside QBufferDC constructor?

select object brush

Kuphryn

[MikeB]

inside QBufferDC constructor?

select object brush

Kuphryn

Sheeesh, always something really dumb. I had to normalize rcClient CRect object. Whoops, forgot to add, also had to convert from device to logical units.

Mike B

[bhushan1980]

Or you can add an handler fucntion into your view class <OnEraseBkgnd>
as under:

BOOL CMHSDProjectView::OnEraseBkgnd(CDC* pDC)
{
// TODO: Add your message handler code here and/or call default

// This code is added for the colored background of the document view

CBrush brNew(RGB(192,192,255)); //Creates a blue brush
CBrush* pOldBrush = (CBrush*)pDC->SelectObject(&brNew);

CRect rc;
pDC->GetClipBox(rc); // Gets the co-ordinates of the client
// area to repaint.
pDC->PatBlt(0,0,rc.Width(),rc.Height(),PATCOPY);
// Repaints client area with current brush.
pDC->SelectObject(pOldBrush);

return TRUE; // Prevents the execution of return
// CView::OnEraseBkgnd(pDC) statement

return CView::OnEraseBkgnd(pDC);
}

Regards,
Bhushan.

[JohnCz]

Use SetClassLong(m_hWnd, GCL_HBRBACKGROUND, (LONG)(HBRUSH)m_Brush)
in OnInitialUpdate or anywhere you want to set new color for view’s background.

Use your own CBrush object or any predefined system brushes (COLOR_xxx).