Re: Cursor Control in MFC

From:
=?Utf-8?B?QyBIaWxsIE1CU0M=?= <CHillMBSC@discussions.microsoft.com>
Newsgroups:
microsoft.public.vc.mfc
Date:
Fri, 16 Mar 2007 06:49:18 -0700
Message-ID:
<841DE7BF-514C-428D-9C82-209F2CEC758A@microsoft.com>
I think that I???ve sussed it out!!! I have declared my own member variable
m_ChangeCursor in my View Class and have sent a message (WM_SETCURSOR) using
the function OnLButtonDown() to call OnSetCursor(), and have changed the
cursor depending on the value of m_ChangeCursor.

Thanks.

--
Engineering

"Ajay Kalra" wrote:

m_ChangeCursor should be a member variable of your class (bool/BOOL). For
testing purposes, if you take that line of code out (if(m_changeCursor), you
will see that cursor is changed. Follow the insrtuction in the article about
what it needs to be and when.

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

"C Hill MBSC" <CHillMBSC@discussions.microsoft.com> wrote in message
news: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

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