RE: Cursor Control in MFC

From:

=?Utf-8?B?QyBIaWxsIE1CU0M=?= <CHillMBSC@discussions.microsoft.com>

Newsgroups:

microsoft.public.vc.mfc

Date:

Fri, 16 Mar 2007 05:44:33 -0700

Message-ID:

<5B9E6F61-7FDE-41AA-B897-0CF6CD32923B@microsoft.com>

Thank you for your response.

I have overridden OnSetCursor() and have inserted the following code, but
unfortunately m_ChangeCursor is undeclared, do you know where, or what it is,
because I can not find it in help, but getting there!

The Output Window:

c:\Data\Visual\CursorControl\CursorControlView.cpp(127): error C2065:
'm_ChangeCursor' : undeclared identifier

// Message WM_SET_CURSOR

BOOL CCursorControlView::OnSetCursor(CWnd* pWnd, UINT nHitTest, UINT message)
{
    // TODO: Add your message handler code here and/or call default
    if ( m_ChangeCursor )
    {
        ::SetCursor(AfxGetApp()->LoadStandardCursor(IDC_WAIT));
        return TRUE;
    }

    return CView::OnSetCursor(pWnd, nHitTest, message);
}

--
Engineering

"C Hill MBSC" wrote:

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