How do I use a "dynamic" tool tip in a CView?

[hiltonc]

I have a standard doc-view app, and i want to display a tool tip whenever the mouse moves on the view. the tip is going to display the coordinates of the mouse. what is the best way to do this?

[Harvey Hawes]

Hi,

There is an excellent article in the back issues of Microsoft System Journal (MSJ). I think it's either in MSJ April 97 or 98. There is a picture on the cover. You can download the source from microsoft. Works well.

HTH,

Harvey

Harvey Hawes

Software Engineer
BioScience Analysis Software Ltd.

Masters Candidate
Cardiovascular/Respiratory Sciences
Faculty of Medicine
University of Calgary
Calgary, Alberta, Canada

[Mallik Bulusu]

In the view class declare following variables (i declared it as public, you can decide on that):

class CMyView : public CView
{
.....
....
public:
CRect toolRect;
CToolTipCtrl m_ToolTip;
CPoint oldPt;
....
...
};

void CMyView::OnInitialUpdate()
{

.....
....
....

//initialize oldPt to (0,0)
oldPt.x = 0;
oldPt.y = 0;

//create the tooltipctrl
m_ToolTip.Create(this,TTS_ALWAYSTIP);
this->GetWindowRect(&toolRect);
ScreenToClient(&toolRect);
}


BOOL CMyView::PreTranslateMessage(MSG* pMsg)
{
POINT pTemp = pMsg->pt;
CString cstrToolTip;
switch (pMsg->message)
{
case WM_MOUSEMOVE:
if((oldPt.x != pMsg->pt.x) ||(oldPt.y != pMsg->pt.y))
{
m_ToolTip.DelTool(this, IDD_VIEW_ID);

cstrToolTip.Format("[%d ,%d]",pTemp.x, pTemp.y);




//id of the form view in resource is needed for addtool call below.

m_ToolTip.AddTool(this, (LPCTSTR)cstrToolTip, &toolRect, IDD_VIEW_ID);
m_ToolTip.Activate(TRUE);
m_ToolTip.SetDelayTime(1000);
m_ToolTip.RelayEvent(pMsg);

oldPt.x = pMsg->pt.x;
oldPt.y = pMsg->pt.y;
}
default:
break;
}
return

//depends on the view you derive from, call its pretranslatemessage....
CFormView::PreTranslateMessage(pMsg);

}