CODEWITHSUNDEEP
c++visual-c++refresh
MrX
MrX

Reputation:

Refresh Window in Visual C++

I've a Visual C++ project but I don't be able to refresh the window and redraw itself. I've used 

RedrawWindow();
m_ProgressDlg->RedrawWindow();

and also

UpdateData(false);
m_ProgressDlg->UpdateData(false);

but never seems go well.

How can I do?

Upvotes: 0

Views: 17160

Answers (6)

JulieC
JulieC

Reputation: 193

You might also be trying to call Invalidate() and RedrawWindow() while m_hWnd is NULL, if by "not going well" means crashing. Try:

if (m_hWnd)
{
   Invalidate();
   RedrawWindow();
}

(I know this is old, but some of us still have one foot stuck in the MFC muck.)

Upvotes: 0

Alex Jenter
Alex Jenter

Reputation: 4432

For client area use InvalidateRect + UpdateWindow. If you want to redraw the non-client area of the window, try calling SetWindowPos with SWP_DRAWFRAME | SWP_NOSIZE | SWP_NOMOVE | SWP_NOACTIVATE.

Upvotes: 2

MrX
MrX

Reputation:

But in release version it doesn't function correctly also if with openeed worspace it seem to go

Upvotes: 0

lx.
lx.

Reputation: 2317

You could use UpdateWindow in conjunction with InvalidateRect to get an immediate redraw.

Upvotes: 5

user106014
user106014

Reputation:

::InvalidateRect(hwnd, NULL, TRUE) WinAPI function (or wnd->InvalidateRect(NULL) method) should do the trick: it invalidates client area and causes the system to send WM_PAINT to the window to redraw it. If you want immediate redraw, you should also call UpdateWindow() just after invalidation.

Upvotes: 1

Mark Ransom
Mark Ransom

Reputation: 308206

Looks like you're using MFC.

I believe your app is busy and not processing messages from the queue, so it's not processing the WM_PAINT that would update the window.

Use the RDW_UPDATENOW parameter with RedrawWindow to force the repaint, even when your window is busy.

Upvotes: 1

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