How to update the view?

[zhiwen]

Hi,
I use MDI App. I input data by a dialog of mainframe, then, open a new file to show the graph. It does work. However, when
I changed the input data, it still showed the previous graph, even I closed the view and reopened it. What's wrong?

Please give me some tips.
Thanks.

zhiwen
Following is the excerpt:

BOOL CMainFrame::inputParameters()
{
// input data dialog
...
}

void CMainFrame::ShowGraph()
{
AfxGetMainWnd()->PostMessage(WM_COMMAND,ID_FILE_NEW);
}

void CVpsView::OnDraw(CDC* pDC)
{
CVpsDoc* pDoc = GetDocument();
ASSERT_VALID(pDoc);
// get data from member of mainFrame
CMainFrame* pf = (CMainFrame*)AfxGetMainWnd();
CPoint pCP = pf->m_drawingData();

// Draw the curve
…
}

[Alexandra]

Try Invalidate()( pView = pointer to current CVpsView) .
May be you can move inputParameters() to CVpsView?

BOOL CMainFrame::inputParameters()
{
// input data dialog
pView->Invalidate();
}



Good Luck!

[zhiwen]

It still doesn't work. This project was created by Appwizard. The data input and drawing never involve in the Document. is this the reason?
Before I finish the data input, I don't want to open the view. This is why I put inputparameters() under MainFrame.

I'm not really understand the mechanism of updating view. under what conditions it will refresh? could you give me some more explains?

regards

zhiwen

[Alexandra]

Hi, zhiwen!
I think MSDN will explain this more better than me , becouse I have very baaad english.
I don't now what reason, becouse may be something wrong in the other code.

But my small test with your code works.
I use OnPaint() instead OnDraw(), but think, it does not matter
If you want , you can send me more code details to [email protected] (attach code)
Good luck!

void CTtestView::OnPaint()
{
CPaintDC dc(this);
OnPrepareDC(&dc);

CMainFrame* pf = (CMainFrame*)AfxGetMainWnd();
CString str = pf->m_drawingData();
int sv = dc.SaveDC();

CRect rect;

dc.SetTextColor(RGB(255,0,0));
dc.SetBkColor(::GetSysColor(COLOR_WINDOW));
GetClientRect(rect);
dc.DrawText(str, -1, rect,
DT_SINGLELINE | DT_CENTER | DT_VCENTER);

dc.RestoreDC(sv);

}