Re: update status in main frame window

From:
"AliR \(VC++ MVP\)" <AliR@online.nospam>
Newsgroups:
microsoft.public.vc.mfc
Date:
Wed, 3 Dec 2008 10:04:40 -0600
Message-ID:
<X4yZk.8804$Ei5.4942@flpi143.ffdc.sbc.com>
The OnUpdatePage gets called automatically when the item ID_INDICATOR_TEST
needs to update its display, you can't call it directly.

What I was proposing was to send a custom message from your dialog to your
main frame and in the handler of the custom message set the text of the
status bar panel.

BEGIN_MESSAGE_MAP(CMainFrame, CFrameWnd)
        ...
ON_UPDATE_COMMAND_UI(ID_INDICATOR_TEST, OnUpdatePage)
ON_MESSAGE(UWM_UPDATESTATUS,OnUpdateStatus) //per joes suggestion
END_MESSAGE_MAP()
//you can define UWM_UPDATESTATUS using #define or using
RegisterWindowMessage
//if you use a registered window message then you will need to use
//ON_REGISTERED_MESSAGE instead of ON_MESSAGE

void CMainFrame::OnUpdatePage(CCmdUI *pCmdUI)
{
    pCmdUI->Enable(m_bEnabled);
}

LRESULT CMainFrame::OnUpdateStatus(WPARAM wParam,LPARAM lParam)
{
    m_wndStatusBar.SetPanelText(wParam,(LPCTSTR)lParam);
}

/in your button handler
void CMyDialog::ButtonHandler()
{
    AfxGetMainWnd()->SendMessage(UWM_UPDATESTATUS,1,(LPARAM)"This is a
test");
}

Just a side note, In your OnUpdatePage you were calling Enable without any
parameter. That really doesn't do much unless you don't have a handler for
the item id in your active view or the frame. Typically when someone
handles the Update UI message of a menu item they have a flag that indicates
whether the item should be enabled or not (unless of course they want to
turn it on all the time when don't have a ON_COMMAND entry for that menu
item).

AliR.

<aloha826@gmail.com> wrote in message
news:9a20249e-ff68-43e5-b453-7bb3f0824bb5@e1g2000pra.googlegroups.com...
Thanks AIR.

I followed the MSDN documentation
msdn.microsoft.com/en-us/library/a9ys3wsb.aspx

, and I created a handler

BEGIN_MESSAGE_MAP(CMainFrame, CFrameWnd)
        ...
ON_UPDATE_COMMAND_UI(ID_INDICATOR_TEST, OnUpdatePage)
END_MESSAGE_MAP()

static UINT indicators[] =
{
ID_SEPARATOR, // status line indicator
ID_INDICATOR_CONNECTSTATUS,
};

void CMainFrame::OnUpdatePage(CCmdUI *pCmdUI)
{
    pCmdUI->Enable();
    CString strPage;
    strPage.Format(_T("TEST1)"));
    pCmdUI->SetText(strPage);
}

Then in my child dialog, how can I call this handler to replace TEST1
with TEST2 at the status pane ?
in child function, I set
CMainFrame *pMain = (CMainFrame*) AfxGetMainWnd();
pMain->OnUpdatePage ...?

Thanks.

Regards,
Kenji

On Dec 3, 1:54 am, "AliR \(VC++ MVP\)" <A...@online.nospam> wrote:

1. WM_SETSTATUS is an example of a custom message. You will have to define
it somewhere. (I typically put them in a file called messages.h)

#define WM_SETSTATUS WM_APP+1

Then you need to put a handler for WM_SETSTATUS in your CMainFrame window
and there do the m_wndStatusBar.SetPaneText

2. You will accomplish this the same way you change the status window
text.
You tell the main frame which menu to disable, and it has to keep track of
this information and when the OnUpdateUI handler of the menu item is
called
you are able to disable it there. If you have any questions on how the
ON_UPDATE_COMMAND_UI works let me know.

AliR.

<aloha...@gmail.com> wrote in message

news:17302485-3f24-4ad6-9534-1e1e272c4e98@u18g2000pro.googlegroups.com...
Hi,

1. ok. I used the AfxGetMainWnd()->SendMessage(WM_SETSTATUS,0,pStr);
but I got:
error C2065: 'WM_SETSTATUS' : undeclared identifier
how to declare it ?

2. One more thing is how can I SendMessage to disable certain menu in
main frame window ?

Many thank to your kind help.

Regards.

On Dec 3, 1:21 am, "AliR \(VC++ MVP\)" <A...@online.nospam> wrote:

There are several ways.

From you button handler you can either do this:

CMainFrame *pWnd = (CMainFrame *)AfxGetMainWnd();
ASSERT(pWnd);
pWnd->GetStatusBar().SetPaneText(0,"Test 123");

note that you need to write a method for GetStatusBar in your CMainFrame
class
CStatusBar &GetStatusBar();

Or you can send a message to the main window
AfxGetMainWnd()->SendMessage(WM_SETSTATUS,0,pStr);

AliR.

<aloha...@gmail.com> wrote in message

news:66d2d089-60c1-453a-8f4e-c0e052ad0e71@z6g2000pre.googlegroups.com...

Hi Expert,

I'm using SDI application

In Mainfrm.cpp, i have

static UINT indicators[] =
{
ID_SEPARATOR, // status line indicator
ID_INDICATOR_TEST,
};

I added a child dialog with one test button on it.
The child dialog is triggered via menu in main frame windows. the
class of child dialog is CDialog base.

class CChildDlg : public CDialog
{
public:
CChildDlg();
...
}

void CMainApp::OnEditDialog()
{
CChildDlg childDlg;
childDlg.DoModal();

}

void CChildDlg::OnBtnTest()
{
// how can I update the status bar in main frame windows ?
// the following code will trigger exception...!!!
CStatusBar m_wndStatusBar;
m_wndStatusBar.CommandToIndex(ID_INDICATOR_TEST);

m_wndStatusBar.SetPaneText(0, "TEST 123", TRUE);
m_wndStatusBar.UpdateWindow();

}

How can I update the status bar in main frame windows, upon clicking
Test button.

Thanks in advance.

Regards,
Kenji

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