Re: Cursor Control in MFC

From:

"Ajay Kalra" <ajaykalra@yahoo.com>

Newsgroups:

microsoft.public.vc.mfc

Date:

Fri, 16 Mar 2007 07:36:24 -0500

Message-ID:

<eu08287ZHHA.808@TK2MSFTNGP04.phx.gbl>

Change your cursor in OnSetCursor instead of handling it in OnLButtonDown.
Here are more details:

http://support.microsoft.com/kb/131991

You can also use CWaitCursor, if that suits your needs.

--
Ajay Kalra [MVP - VC++]
ajaykalra@yahoo.com

"C Hill MBSC" <CHillMBSC@discussions.microsoft.com> wrote in message
news:2D10BD5C-7381-42B8-97C3-5E2D3380C20A@microsoft.com...

In 1994 I used the code from Kruglinski to change the cursor to an hour
glass (see below). This does not seem to work in Visual C++ 2003.NET using
MFC. The cursor changes back to what it was, immediately, unless you put a
delay in it! Not very good! Any suggestions from the Visual C++ Team?

// CursorControlView.cpp : implementation of the CCursorControlView class
//

#include "stdafx.h"
#include "CursorControl.h"

#include "CursorControlDoc.h"
#include "CursorControlView.h"
#include ".\cursorcontrolview.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#endif

// CCursorControlView

IMPLEMENT_DYNCREATE(CCursorControlView, CView)

BEGIN_MESSAGE_MAP(CCursorControlView, CView)
// 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)
ON_WM_LBUTTONDOWN()
END_MESSAGE_MAP()

// CCursorControlView construction/destruction

CCursorControlView::CCursorControlView()
{
// TODO: add construction code here

}

CCursorControlView::~CCursorControlView()
{
}

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

return CView::PreCreateWindow(cs);
}

// CCursorControlView drawing

void CCursorControlView::OnDraw(CDC* /*pDC*/)
{
CCursorControlDoc* pDoc = GetDocument();
ASSERT_VALID(pDoc);
if (!pDoc)
return;

// TODO: add draw code for native data here
}

// CCursorControlView printing

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

void CCursorControlView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo*

/*pInfo*/)

{
// TODO: add extra initialization before printing
}

void CCursorControlView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo*

/*pInfo*/)

{
// TODO: add cleanup after printing
}

// CCursorControlView diagnostics

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

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

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

// CCursorControlView message handlers

void CCursorControlView::OnLButtonDown(UINT nFlags, CPoint point)
{
// TODO: Add your message handler code here and/or call default

// The next line is code taken from Inside Visual C++ (Kruglinski)
::SetCursor(::LoadCursor(NULL, IDC_WAIT));

// This stop the cursor going back to what it was!
Sleep(1000);

// P.S. Why does the cursor revert to an arrow ?

CView::OnLButtonDown(nFlags, point);
}

--
Engineering