CWaitCursor is not working for MFC-MDI application

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Hi Friends,

I have a MFC-MDI application, in which I want to use CWaitCursor while loading data on active form view. When I open a form, it loads data and till the data loading complete I don't want to allow user to access another forms or other functionality.

Can anyone tell me solution on it.

Thanks in advance.

Posted 14-Apr-11 23:42pm

aamswe

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aamswe 15-Apr-11 5:52am

I have tried few methods CWaitCursor, SetCursor(), BeginWaitCursor(), but all are not working.
MFC-MDI application does not support wait cursor?

2 solutions

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#realJSOP · Answer 1 · 2011-04-14T23:44:00

Solution 1

In the designer, make all of the controls in the form disabled. In the code, after the data is loaded, enumerate all of the controls on the form, and enable them. Here's an article I wrote that shows how to enumerate controls in a form:

Enumerate Controls In a Dialog Box or FormView[^]

Posted 14-Apr-11 23:44pm

#realJSOP

Olivier Levrey · Answer 2 · 2011-04-15T00:03:00

CWaitCursor doesn't prevent user from clicking, it just displays the wait cursor.

You can disable your main window while your are loading your data (or the current modal dialog box if you are using a modal dialog box):

//disable the main window
AfxGetMainWnd()->EnableWindow(FALSE);
...
//re-enable the main window
AfxGetMainWnd()->EnableWindow(TRUE);

You must ensure that you will always reach the EnableWindow(TRUE) (even if an error happens during your loading process for example), otherwise your application will be blocked.

Or from a modal dialog box:

//disable the dialog box
EnableWindow(FALSE);
...
//re-enable the dialog box
EnableWindow(TRUE);

Same remark for that one: make sure you will always reach EnableWindow(TRUE).

aamswe wrote:
This solution is usefull but getting memory error on //re-enable the main window AfxGetMainWnd()->EnableWindow(TRUE); what could be the reason?

Check that the pointer returned by AfxGetMainWnd is valid. Usually, this function returns the first window created by your application. If the first window is destroyed, the function can return an old pointer on that destroyed window.

Actually, AfxGetMainWnd returns m_pMainWnd from your CWinApp-derived object. You can update this member from InitInstance for example.

Or you can just store the pointer by yourself and not use AfxGetMainWnd.