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Dear support,

This is a bug I reported a couple of months ago in 2.83, which was not there in 2.82, even sent you a clip showing how in 2.83, you can get to a scenario in which you resize a flating bar, the mouse cursor and the the dragged window frame are not at the same location, which is very confusing.

I will send you via mail two things:

1. The clip to refresh your memory

2. A sample application that reproduce this problem

After compiling (in debug) and running the application do this:

1. Open 10 documents (each one moves a blue square on a red background)

2. Tile them

3. Group the 3 floating dialogs together into one tab.

4. Detach one of the dialog from the tab

5. Quickly resize it’s bottom frame to make it higher.

You’ll see that the frame of the bar and the mouse are not at the same position.

Please let me know if you have any problems reproducing it, and please fix for 2.84, this bug prevented us from swithcing to 2.83

Thanks

Ron.

This is a screenshot from the application when the bug happens:

It looks like we fixed this problem. Thank you. Please update the source code for the following method:

void CExtMiniDockFrameWnd::_ResizingStart(
      UINT nHitTest,
      const CPoint & point
      )
{
      ASSERT( m_nResizingMode == HTNOWHERE );
      ASSERT( IsWindowVisible() );
CPoint pointCurrentCursorPos = point;
      ScreenToClient( &pointCurrentCursorPos );
      CExtPopupMenuWnd::CancelMenuTracking();
      CWnd::CancelToolTips();
CExtControlBar * pExtBar = GetControlBarExt();
      ASSERT_VALID( pExtBar );
      if( ! pExtBar->_FloatStateChangingIsEnabled( pExtBar ) )
            return;
      if( ( ! pExtBar->_IsShowContentWhenDragging() ) && pExtBar->IsFixedMode() )
      {
            m_nResizingMode = HTNOWHERE;
            pExtBar->m_pDockContext->StartResize(nHitTest, point);
            return;
      }
      switch( nHitTest )
      {
      case HTLEFT:
      case HTRIGHT:
      case HTTOP:
      case HTTOPLEFT:
      case HTTOPRIGHT:
      case HTBOTTOM:
      case HTBOTTOMLEFT:
      case HTBOTTOMRIGHT:
            m_nResizingMode = nHitTest;
      break;
      default:
            return;
      }
#ifdef _DEBUG
int nPos = 1;
CControlBar * pDebugDummyBar = NULL;
      while( pDebugDummyBar == NULL && nPos < m_wndDockBar.m_arrBars.GetSize() )
            pDebugDummyBar = reinterpret_cast < CExtDockBar & > ( m_wndDockBar ) . GetDockedControlBar( nPos++ );
      ASSERT( pDebugDummyBar != NULL );
      ASSERT_KINDOF( CExtControlBar, pDebugDummyBar );
      ASSERT( pDebugDummyBar->m_pDockContext != NULL );
      ASSERT( (m_wndDockBar.m_dwStyle & CBRS_FLOAT_MULTI) == 0 );
#endif
      ASSERT( pExtBar == pDebugDummyBar );
      ASSERT( pExtBar->m_pDockContext != NULL );
      if( ! pExtBar->IsFixedMode() )
            ModifyStyle( __REMOVED_NONFIXMODE_STYLES, 0 );
      BringWindowToTop();
      CExtMouseCaptureSink::SetCapture( GetSafeHwnd() );
      GetWindowRect( &m_rcWndResizingStart );
HWND hWndExtBar = pExtBar->m_hWnd;
      pExtBar->OnControlBarPositionChange( pExtBar, CExtControlBar::__ECBPC_FLOATING_FRAME_RESIZING, true, false );
      _ResizingUpdateState( pointCurrentCursorPos );
      pExtBar->OnControlBarPositionChange( pExtBar, CExtControlBar::__ECBPC_FLOATING_FRAME_RESIZING, false, false );
      while( m_nResizingMode != HTNOWHERE )
      {
            ::WaitMessage();
            MSG msg;
            while( PeekMessage(&msg, NULL, 0, 0, PM_NOREMOVE) )
            {
                  bool bStop = false;
                  switch( msg.message )
                  {
                  case WM_ACTIVATEAPP:
                  case WM_COMMAND:
                        bStop = true;
                  break;
                  default:
                        if( WM_KEYFIRST <= msg.message && msg.message <= WM_KEYLAST )
                              bStop = true;
                  break;
                  case WM_MOUSEMOVE:
                        if( _ResizingIsInProgress() )
                        {
                              PeekMessage(&msg, NULL, WM_MOUSEMOVE, WM_MOUSEMOVE, PM_REMOVE);
                              for( ; PeekMessage(&msg, NULL, WM_MOUSEMOVE, WM_MOUSEMOVE, PM_NOREMOVE); )
                                    PeekMessage(&msg, NULL, WM_MOUSEMOVE, WM_MOUSEMOVE, PM_REMOVE);
                              if( ::GetCursorPos( &pointCurrentCursorPos ) )
                              {
                                    _ResizingUpdateState( pointCurrentCursorPos );
                                    pExtBar->OnControlBarPositionChange( pExtBar, CExtControlBar::__ECBPC_FLOATING_FRAME_RESIZING, false, false );
                              }
                              continue;
                        }
                        break;
                  }
                  if( (!bStop) && CExtMouseCaptureSink::GetCapture() != GetSafeHwnd() )
                        bStop = true;
                  if( bStop )
                  {
                        _ResizingEnd();
                        if( ::IsWindow( hWndExtBar ) )
                              pExtBar->OnControlBarPositionChange( pExtBar, CExtControlBar::__ECBPC_FLOATING_FRAME_RESIZING, false, true );
                        return;
                  }
                  if( !AfxGetThread()->PumpMessage() )
                  {
                        PostQuitMessage(0);
                        return;
                  }
            }
            if( CExtControlBar::g_bEnableOnIdleCalls )
            {
                  for( LONG nIdleCounter = 0L; ::AfxGetThread()->OnIdle(nIdleCounter); nIdleCounter ++ );
            }
      }
      if( ::IsWindow( hWndExtBar ) )
            pExtBar->OnControlBarPositionChange( pExtBar, CExtControlBar::__ECBPC_FLOATING_FRAME_RESIZING, false, true );
}

Problem solved!

Thanks.