Re: Toolbar doesn't react on first click.

From:

"Tom Serface" <tom.nospam@camaswood.com>

Newsgroups:

microsoft.public.vc.mfc

Date:

Tue, 7 Aug 2007 07:51:58 -0700

Message-ID:

<550BD701-C773-45AD-93B7-4452BA988B38@microsoft.com>

It could be when you show the window it is not actually the program with the
focus and click on the toolbar the first time gets the focus, the second
time it clicks the button. I see this with lots of programs. Try this, if
you click on the title bar (anywhere on the bar), then click on the toolbar
button, does it work the first time?

Tom

"borrow_me" <borrow@ddd.ddd> wrote in message
news:f99jvl$5qp$1@news.onet.pl...

Hello everyone. I create program with one toolbar and few CWnd objects in
CFrameWnd. Only one window (CWnd) is shown at time. When I start some
action on this window (OnLButtonUp and OnlButtonDown) program makes few
expensive calculation, next he hides window (SW_HIDE), and shows another
(SW_SHOW). But sometimes when I make double-click on window, everything
show OK, but toolbar freeze (doesn't react on first click and I must click
him once more). I try to override OnLButtonDblClk but my application never
goes in to. I thing the problem are messages that are pushed to queue when
program makes this calculation. I must fix this bug as fast as possible,
so I try to override Run method. Before program start calculation I set
semaphore up, then I start calculation, clear message queue, and after
calculations semaphore goes down. I don't know it is good solution anyway
I probably making something wrong because i.e. WM_SETFOCUS messages are
still received by window even when semaphore is up. Any help will be
great. This is my override Run method:

volatile bool someFocus = false;
// semaphore
volatile bool youCanPump = true;

int CDodaApp::Run()
{
  youCanPump = true;
  someFocus = false;

  if (m_pMainWnd == NULL && AfxOleGetUserCtrl())
  {
    // Not launched /Embedding or /Automation, but has
    no main window!
      TRACE0("Warning: m_pMainWnd is NULL in CWinApp::Run
          - quitting application.\n");
    AfxPostQuitMessage(0);
  }
  ASSERT_VALID(this);

  // for tracking the idle time state
  BOOL bIdle = TRUE;
  LONG lIdleCount = 0;

  // acquire and dispatch messages until a WM_QUIT message
  is received.
    for (;;)
    {
      if(youCanPump == true)
      {
        // phase1: check to see if we can do idle work
        while (bIdle && !::PeekMessage(&m_msgCur, NULL,
              NULL, NULL, PM_NOREMOVE))
        {
          // call OnIdle while in bIdle state
          if (!OnIdle(lIdleCount++))
            bIdle = FALSE; // assume "no idle" state
        }

        // phase2: pump messages while available
        do
        {
          if(m_msgCur.message == WM_SETFOCUS ||
              m_msgCur.message == WM_KILLFOCUS)
            someFocus = true;

          // pump message, but quit on WM_QUIT
          if (!PumpMessage())
            return ExitInstance();

          // reset "no idle" state after pumping
          "normal" message
            if (IsIdleMessage(&m_msgCur))
            {
              bIdle = TRUE;
              lIdleCount = 0;
            }

        } while (::PeekMessage(&m_msgCur, NULL, NULL,
              NULL, PM_NOREMOVE));
      }
      else
      {
        while(::PeekMessage(&m_msgCur, NULL, NULL, NULL,
              PM_REMOVE))
          if(m_msgCur.message == WM_SETFOCUS ||
              m_msgCur.message == WM_KILLFOCUS)
            someFocus = true;
      }
    }
  ASSERT(FALSE); // not reachable
}