appcmn.cpp

来自「A*算法 A*算法 A*算法 A*算法A*算法A*算法」· C++ 代码 · 共 613 行 · 第 1/2 页

    wxEventLoop * const loop = wxEventLoop::GetActive();

    return loop && loop->Dispatch();
#else // wxUSE_EVTLOOP_IN_APP
    return true;
#endif // wxUSE_EVTLOOP_IN_APP/!wxUSE_EVTLOOP_IN_APP
}

// ----------------------------------------------------------------------------
// OnXXX() hooks
// ----------------------------------------------------------------------------

bool wxAppBase::OnInitGui()
{
#ifdef __WXUNIVERSAL__
    if ( !wxTheme::Get() && !wxTheme::CreateDefault() )
        return false;
#endif // __WXUNIVERSAL__

    return true;
}

int wxAppBase::OnRun()
{
    // see the comment in ctor: if the initial value hasn't been changed, use
    // the default Yes from now on
    if ( m_exitOnFrameDelete == Later )
    {
        m_exitOnFrameDelete = Yes;
    }
    //else: it has been changed, assume the user knows what he is doing

    return MainLoop();
}

int wxAppBase::OnExit()
{
#ifdef __WXUNIVERSAL__
    delete wxTheme::Set(NULL);
#endif // __WXUNIVERSAL__

    return wxAppConsole::OnExit();
}

void wxAppBase::Exit()
{
    ExitMainLoop();
}

wxAppTraits *wxAppBase::CreateTraits()
{
    return new wxGUIAppTraits;
}

// ----------------------------------------------------------------------------
// misc
// ----------------------------------------------------------------------------

void wxAppBase::SetActive(bool active, wxWindow * WXUNUSED(lastFocus))
{
    if ( active == m_isActive )
        return;

    m_isActive = active;

    wxActivateEvent event(wxEVT_ACTIVATE_APP, active);
    event.SetEventObject(this);

    (void)ProcessEvent(event);
}

void wxAppBase::DeletePendingObjects()
{
    wxList::compatibility_iterator node = wxPendingDelete.GetFirst();
    while (node)
    {
        wxObject *obj = node->GetData();

        delete obj;

        if (wxPendingDelete.Member(obj))
            wxPendingDelete.Erase(node);

        // Deleting one object may have deleted other pending
        // objects, so start from beginning of list again.
        node = wxPendingDelete.GetFirst();
    }
}

// Returns true if more time is needed.
bool wxAppBase::ProcessIdle()
{
    wxIdleEvent event;
    bool needMore = false;
    wxWindowList::compatibility_iterator node = wxTopLevelWindows.GetFirst();
    while (node)
    {
        wxWindow* win = node->GetData();
        if (SendIdleEvents(win, event))
            needMore = true;
        node = node->GetNext();
    }

    event.SetEventObject(this);
    (void) ProcessEvent(event);
    if (event.MoreRequested())
        needMore = true;

    wxUpdateUIEvent::ResetUpdateTime();

    return needMore;
}

// Send idle event to window and all subwindows
bool wxAppBase::SendIdleEvents(wxWindow* win, wxIdleEvent& event)
{
    bool needMore = false;

    win->OnInternalIdle();

    if (wxIdleEvent::CanSend(win))
    {
        event.SetEventObject(win);
        win->GetEventHandler()->ProcessEvent(event);

        if (event.MoreRequested())
            needMore = true;
    }
    wxWindowList::compatibility_iterator node = win->GetChildren().GetFirst();
    while ( node )
    {
        wxWindow *child = node->GetData();
        if (SendIdleEvents(child, event))
            needMore = true;

        node = node->GetNext();
    }

    return needMore;
}

void wxAppBase::OnIdle(wxIdleEvent& WXUNUSED(event))
{
    // If there are pending events, we must process them: pending events
    // are either events to the threads other than main or events posted
    // with wxPostEvent() functions
    // GRG: I have moved this here so that all pending events are processed
    //   before starting to delete any objects. This behaves better (in
    //   particular, wrt wxPostEvent) and is coherent with wxGTK's current
    //   behaviour. Changed Feb/2000 before 2.1.14
    ProcessPendingEvents();

    // 'Garbage' collection of windows deleted with Close().
    DeletePendingObjects();

#if wxUSE_LOG
    // flush the logged messages if any
    wxLog::FlushActive();
#endif // wxUSE_LOG

}

// ----------------------------------------------------------------------------
// wxGUIAppTraitsBase
// ----------------------------------------------------------------------------

#if wxUSE_LOG

wxLog *wxGUIAppTraitsBase::CreateLogTarget()
{
#if wxUSE_LOGGUI
    return new wxLogGui;
#else
    // we must have something!
    return new wxLogStderr;
#endif
}

#endif // wxUSE_LOG

wxMessageOutput *wxGUIAppTraitsBase::CreateMessageOutput()
{
    // The standard way of printing help on command line arguments (app --help)
    // is (according to common practice):
    //     - console apps: to stderr (on any platform)
    //     - GUI apps: stderr on Unix platforms (!)
    //                 message box under Windows and others
#ifdef __UNIX__
    return new wxMessageOutputStderr;
#else // !__UNIX__
    // wxMessageOutputMessageBox doesn't work under Motif
    #ifdef __WXMOTIF__
        return new wxMessageOutputLog;
    #else
        return new wxMessageOutputMessageBox;
    #endif
#endif // __UNIX__/!__UNIX__
}

#if wxUSE_FONTMAP

wxFontMapper *wxGUIAppTraitsBase::CreateFontMapper()
{
    return new wxFontMapper;
}

#endif // wxUSE_FONTMAP

wxRendererNative *wxGUIAppTraitsBase::CreateRenderer()
{
    // use the default native renderer by default
    return NULL;
}

#ifdef __WXDEBUG__

bool wxGUIAppTraitsBase::ShowAssertDialog(const wxString& msg)
{
    // under MSW we prefer to use the base class version using ::MessageBox()
    // even if wxMessageBox() is available because it has less chances to
    // double fault our app than our wxMessageBox()
#if defined(__WXMSW__) || !wxUSE_MSGDLG
    return wxAppTraitsBase::ShowAssertDialog(msg);
#else // wxUSE_MSGDLG
    // this message is intentionally not translated -- it is for
    // developpers only
    wxString msgDlg(msg);
    msgDlg += wxT("\nDo you want to stop the program?\n")
              wxT("You can also choose [Cancel] to suppress ")
              wxT("further warnings.");

    switch ( wxMessageBox(msgDlg, wxT("wxWidgets Debug Alert"),
                          wxYES_NO | wxCANCEL | wxICON_STOP ) )
    {
        case wxYES:
            wxTrap();
            break;

        case wxCANCEL:
            // no more asserts
            return true;

        //case wxNO: nothing to do
    }

    return false;
#endif // !wxUSE_MSGDLG/wxUSE_MSGDLG
}

#endif // __WXDEBUG__

bool wxGUIAppTraitsBase::HasStderr()
{
    // we consider that under Unix stderr always goes somewhere, even if the
    // user doesn't always see it under GUI desktops
#ifdef __UNIX__
    return true;
#else
    return false;
#endif
}

void wxGUIAppTraitsBase::ScheduleForDestroy(wxObject *object)
{
    if ( !wxPendingDelete.Member(object) )
        wxPendingDelete.Append(object);
}

void wxGUIAppTraitsBase::RemoveFromPendingDelete(wxObject *object)
{
    wxPendingDelete.DeleteObject(object);
}

#if wxUSE_SOCKETS

#if defined(__WINDOWS__)
    #include "wx/msw/gsockmsw.h"
#elif defined(__UNIX__) || defined(__DARWIN__) || defined(__OS2__)
    #include "wx/unix/gsockunx.h"
#elif defined(__WXMAC__)
  #include <MacHeaders.c>
  #define OTUNIXERRORS 1
  #include <OpenTransport.h>
  #include <OpenTransportProviders.h>
  #include <OpenTptInternet.h>

  #include "wx/mac/gsockmac.h"
#else
    #error "Must include correct GSocket header here"
#endif

GSocketGUIFunctionsTable* wxGUIAppTraitsBase::GetSocketGUIFunctionsTable()
{
#if defined(__WXMAC__) && !defined(__DARWIN__)
    // NB: wxMac CFM does not have any GUI-specific functions in gsocket.c and
    //     so it doesn't need this table at all
    return NULL;
#else // !__WXMAC__ || __DARWIN__
    static GSocketGUIFunctionsTableConcrete table;
    return &table;
#endif // !__WXMAC__ || __DARWIN__
}

#endif