bool wxAppTraitsBase::ShowAssertDialog(const wxString& msgOriginal)
{
#if wxDEBUG_LEVEL
wxString msg = msgOriginal;
#if wxUSE_STACKWALKER
#if !defined(__WXMSW__)
// on Unix stack frame generation may take some time, depending on the
// size of the executable mainly... warn the user that we are working
wxFprintf(stderr, wxT("[Debug] Generating a stack trace... please wait"));
fflush(stderr);
#endif
const wxString stackTrace = GetAssertStackTrace();
if ( !stackTrace.empty() )
msg << _T("\n\nCall stack:\n") << stackTrace;
#endif // wxUSE_STACKWALKER
return DoShowAssertDialog(msg);
#else // !wxDEBUG_LEVEL
wxUnusedVar(msgOriginal);
return false;
#endif // wxDEBUG_LEVEL/!wxDEBUG_LEVEL
}
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()
//
// under DFB the message dialog is not always functional right now
//
// and finally we can't use wxMessageBox() if it wasn't compiled in, of
// course
#if defined(__WXMSW__) || defined(__WXDFB__) || !wxUSE_MSGDLG
return wxAppTraitsBase::ShowAssertDialog(msg);
#else // wxUSE_MSGDLG
#if wxDEBUG_LEVEL
wxString msgDlg = msg;
#if wxUSE_STACKWALKER
// on Unix stack frame generation may take some time, depending on the
// size of the executable mainly... warn the user that we are working
wxFprintf(stderr, wxT("[Debug] Generating a stack trace... please wait"));
fflush(stderr);
const wxString stackTrace = GetAssertStackTrace();
if ( !stackTrace.empty() )
msgDlg << _T("\n\nCall stack:\n") << stackTrace;
#endif // wxUSE_STACKWALKER
// this message is intentionally not translated -- it is for
// developpers only
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
}
#else // !wxDEBUG_LEVEL
// this function always exists (for ABI compatibility) but is never called
// if debug level is 0 and so can simply do nothing then
wxUnusedVar(msg);
#endif // wxDEBUG_LEVEL/!wxDEBUG_LEVEL
return false;
#endif // !wxUSE_MSGDLG/wxUSE_MSGDLG
}
bool wxGUIAppTraitsBase::ShowAssertDialog(const wxString& msg)
{
#if wxDEBUG_LEVEL
// 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()
//
// under DFB the message dialog is not always functional right now
//
// and finally we can't use wxMessageBox() if it wasn't compiled in, of
// course
#if !defined(__WXMSW__) && !defined(__WXDFB__) && wxUSE_MSGDLG
// we can't (safely) show the GUI dialog from another thread, only do it
// for the asserts in the main thread
if ( wxIsMainThread() )
{
wxString msgDlg = msg;
#if wxUSE_STACKWALKER
const wxString stackTrace = GetAssertStackTrace();
if ( !stackTrace.empty() )
msgDlg << wxT("\n\nCall stack:\n") << stackTrace;
#endif // wxUSE_STACKWALKER
// this message is intentionally not translated -- it is for
// developpers only
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
#endif // wxDEBUG_LEVEL
return wxAppTraitsBase::ShowAssertDialog(msg);
}
bool wxAppTraitsBase::ShowAssertDialog(const wxString& msgOriginal)
{
#if wxDEBUG_LEVEL
wxString msg;
#if wxUSE_STACKWALKER
const wxString stackTrace = GetAssertStackTrace();
if ( !stackTrace.empty() )
{
msg << wxT("\n\nCall stack:\n") << stackTrace;
wxMessageOutputDebug().Output(msg);
}
#endif // wxUSE_STACKWALKER
return DoShowAssertDialog(msgOriginal + msg);
#else // !wxDEBUG_LEVEL
wxUnusedVar(msgOriginal);
return false;
#endif // wxDEBUG_LEVEL/!wxDEBUG_LEVEL
}
// show the assert modal dialog
static
void ShowAssertDialog(const wxChar *szFile,
int nLine,
const wxChar *szCond,
const wxChar *szMsg,
wxAppTraits *traits)
{
// this variable can be set to true to suppress "assert failure" messages
static bool s_bNoAsserts = false;
wxString msg;
msg.reserve(2048);
// make life easier for people using VC++ IDE by using this format: like
// this, clicking on the message will take us immediately to the place of
// the failed assert
msg.Printf(wxT("%s(%d): assert \"%s\" failed"), szFile, nLine, szCond);
if ( szMsg )
{
msg << _T(": ") << szMsg;
}
else // no message given
{
msg << _T('.');
}
#if wxUSE_STACKWALKER
const wxString stackTrace = GetAssertStackTrace();
if ( !stackTrace.empty() )
{
msg << _T("\n\nCall stack:\n") << stackTrace;
}
#endif // wxUSE_STACKWALKER
#if wxUSE_THREADS
// if we are not in the main thread, output the assert directly and trap
// since dialogs cannot be displayed
if ( !wxThread::IsMain() )
{
msg += wxT(" [in child thread]");
#if defined(__WXMSW__) && !defined(__WXMICROWIN__)
msg << wxT("\r\n");
OutputDebugString(msg );
#else
// send to stderr
wxFprintf(stderr, wxT("%s\n"), msg.c_str());
fflush(stderr);
#endif
// He-e-e-e-elp!! we're asserting in a child thread
wxTrap();
}
else
#endif // wxUSE_THREADS
if ( !s_bNoAsserts )
{
// send it to the normal log destination
wxLogDebug(_T("%s"), msg.c_str());
if ( traits )
{
// delegate showing assert dialog (if possible) to that class
s_bNoAsserts = traits->ShowAssertDialog(msg);
}
else // no traits object
{
// fall back to the function of last resort
s_bNoAsserts = DoShowAssertDialog(msg);
}
}
}
bool wxGUIAppTraitsBase::ShowAssertDialog(const wxString& msg)
{
#if defined(__WXMSW__) || !wxUSE_MSGDLG
// 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()
return wxAppTraitsBase::ShowAssertDialog(msg);
#else // wxUSE_MSGDLG
wxString msgDlg = msg;
#if wxUSE_STACKWALKER
// on Unix stack frame generation may take some time, depending on the
// size of the executable mainly... warn the user that we are working
wxFprintf(stderr, wxT("[Debug] Generating a stack trace... please wait"));
fflush(stderr);
const wxString stackTrace = GetAssertStackTrace();
if ( !stackTrace.empty() )
msgDlg << _T("\n\nCall stack:\n") << stackTrace;
#endif // wxUSE_STACKWALKER
// this message is intentionally not translated -- it is for
// developpers only
msgDlg += wxT("\nDo you want to stop the program?\n")
wxT("You can also choose [Cancel] to suppress ")
wxT("further warnings.");
#ifdef __WXMAC__
// in order to avoid reentrancy problems, use the lowest alert API available
CFOptionFlags exitButton;
wxMacCFStringHolder cfText(msgDlg);
OSStatus err = CFUserNotificationDisplayAlert(
0, kAlertStopAlert, NULL, NULL, NULL, CFSTR("wxWidgets Debug Alert"), cfText,
CFSTR("Yes"), CFSTR("No"), CFSTR("Cancel"), &exitButton );
if ( err == noErr )
{
switch( exitButton )
{
case 0 : // yes
wxTrap();
break;
case 2 : // cancel
// no more asserts
return true;
case 1 : // no -> nothing to do
break ;
}
}
#else
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
}
#endif
return false;
#endif // !wxUSE_MSGDLG/wxUSE_MSGDLG
}
