don't crash when loading images with verbose==false (patch 1449823)

[wxWidgets.git] / src / common / appcmn.cpp

diff --git a/src/common/appcmn.cpp b/src/common/appcmn.cpp
index 0b7b957dc3378b6a0e91230cbd03ef92db631b75..747e7e2ecdcee8f21f316742f156b07786e9fd62 100644 (file)
--- a/src/common/appcmn.cpp
+++ b/src/common/appcmn.cpp
@@ -1,6 +1,6 @@
 /////////////////////////////////////////////////////////////////////////////
 /////////////////////////////////////////////////////////////////////////////

-// Name:        common/appcmn.cpp
-// Purpose:     wxAppBase methods common to all platforms
+// Name:        src/common/appcmn.cpp
+// Purpose:     wxAppConsole and wxAppBase methods common to all platforms

 // Author:      Vadim Zeitlin
 // Modified by:
 // Created:     18.10.99
 // Author:      Vadim Zeitlin
 // Modified by:
 // Created:     18.10.99


@@ -17,10 +17,6 @@
 // headers
 // ---------------------------------------------------------------------------
 
 // headers
 // ---------------------------------------------------------------------------
 

-#ifdef __GNUG__
-    #pragma implementation "appbase.h"
-#endif
-

 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 


@@ -30,109 +26,588 @@
 
 #ifndef WX_PRECOMP
     #include "wx/app.h"
 
 #ifndef WX_PRECOMP
     #include "wx/app.h"

+    #include "wx/bitmap.h"
+    #include "wx/intl.h"

     #include "wx/list.h"
     #include "wx/list.h"

+    #include "wx/log.h"
+    #include "wx/msgdlg.h"
+    #include "wx/bitmap.h"
+    #include "wx/confbase.h"

 #endif
 
 #endif
 

+#include "wx/apptrait.h"
+#include "wx/cmdline.h"
+#include "wx/evtloop.h"
+#include "wx/msgout.h"

 #include "wx/thread.h"
 #include "wx/thread.h"

-#include "wx/confbase.h"
+#include "wx/utils.h"
+#include "wx/ptr_scpd.h"
+
+#if defined(__WXMSW__)
+    #include  "wx/msw/private.h"  // includes windows.h for LOGFONT
+#endif
+
+#if wxUSE_FONTMAP
+    #include "wx/fontmap.h"
+#endif // wxUSE_FONTMAP
+
+// DLL options compatibility check:
+#include "wx/build.h"
+WX_CHECK_BUILD_OPTIONS("wxCore")
+
+
+// ----------------------------------------------------------------------------
+// wxEventLoopPtr
+// ----------------------------------------------------------------------------
+
+// this defines wxEventLoopPtr
+wxDEFINE_TIED_SCOPED_PTR_TYPE(wxEventLoop)
+
+// ============================================================================
+// wxAppBase implementation
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// initialization
+// ----------------------------------------------------------------------------
+
+wxAppBase::wxAppBase()
+{
+    m_topWindow = (wxWindow *)NULL;
+    m_useBestVisual = false;
+    m_isActive = true;
+
+    m_mainLoop = NULL;
+
+    // We don't want to exit the app if the user code shows a dialog from its
+    // OnInit() -- but this is what would happen if we set m_exitOnFrameDelete
+    // to Yes initially as this dialog would be the last top level window.
+    // OTOH, if we set it to No initially we'll have to overwrite it with Yes
+    // when we enter our OnRun() because we do want the default behaviour from
+    // then on. But this would be a problem if the user code calls
+    // SetExitOnFrameDelete(false) from OnInit().
+    //
+    // So we use the special "Later" value which is such that
+    // GetExitOnFrameDelete() returns false for it but which we know we can
+    // safely (i.e. without losing the effect of the users SetExitOnFrameDelete
+    // call) overwrite in OnRun()
+    m_exitOnFrameDelete = Later;
+}
+
+bool wxAppBase::Initialize(int& argcOrig, wxChar **argvOrig)
+{
+    if ( !wxAppConsole::Initialize(argcOrig, argvOrig) )
+        return false;
+
+#if wxUSE_THREADS
+    wxPendingEventsLocker = new wxCriticalSection;
+#endif
+
+    wxInitializeStockLists();
+    wxInitializeStockObjects();
+
+    wxBitmap::InitStandardHandlers();
+
+    return true;
+}
+
+// ----------------------------------------------------------------------------
+// cleanup
+// ----------------------------------------------------------------------------
+
+wxAppBase::~wxAppBase()
+{
+    // this destructor is required for Darwin
+}
+
+void wxAppBase::CleanUp()
+{
+    // clean up all the pending objects
+    DeletePendingObjects();
+
+    // and any remaining TLWs (they remove themselves from wxTopLevelWindows
+    // when destroyed, so iterate until none are left)
+    while ( !wxTopLevelWindows.empty() )
+    {
+        // do not use Destroy() here as it only puts the TLW in pending list
+        // but we want to delete them now
+        delete wxTopLevelWindows.GetFirst()->GetData();
+    }
+
+    // undo everything we did in Initialize() above
+    wxBitmap::CleanUpHandlers();
+
+    wxDeleteStockObjects();
+
+    wxDeleteStockLists();
+
+    delete wxTheColourDatabase;
+    wxTheColourDatabase = NULL;
+
+    delete wxPendingEvents;
+    wxPendingEvents = NULL;
+
+#if wxUSE_THREADS
+    delete wxPendingEventsLocker;
+    wxPendingEventsLocker = NULL;
+
+    #if wxUSE_VALIDATORS
+        // If we don't do the following, we get an apparent memory leak.
+        ((wxEvtHandler&) wxDefaultValidator).ClearEventLocker();
+    #endif // wxUSE_VALIDATORS
+#endif // wxUSE_THREADS
+}
+
+#if wxUSE_CMDLINE_PARSER

 
 

+// ----------------------------------------------------------------------------
+// GUI-specific command line options handling
+// ----------------------------------------------------------------------------
+
+#define OPTION_THEME   _T("theme")
+#define OPTION_MODE    _T("mode")
+
+void wxAppBase::OnInitCmdLine(wxCmdLineParser& parser)
+{
+    // first add the standard non GUI options
+    wxAppConsole::OnInitCmdLine(parser);
+
+    // the standard command line options
+    static const wxCmdLineEntryDesc cmdLineGUIDesc[] =
+    {

 #ifdef __WXUNIVERSAL__
 #ifdef __WXUNIVERSAL__

-    #include "wx/univ/theme.h"
+        {
+            wxCMD_LINE_OPTION,
+            wxEmptyString,
+            OPTION_THEME,
+            gettext_noop("specify the theme to use"),
+            wxCMD_LINE_VAL_STRING,
+            0x0
+        },

 #endif // __WXUNIVERSAL__
 
 #endif // __WXUNIVERSAL__
 

-// ===========================================================================
-// implementation
-// ===========================================================================
+#if defined(__WXMGL__)
+        // VS: this is not specific to wxMGL, all fullscreen (framebuffer) ports
+        //     should provide this option. That's why it is in common/appcmn.cpp
+        //     and not mgl/app.cpp
+        {
+            wxCMD_LINE_OPTION,
+            wxEmptyString,
+            OPTION_MODE,
+            gettext_noop("specify display mode to use (e.g. 640x480-16)"),
+            wxCMD_LINE_VAL_STRING,
+            0x0
+        },
+#endif // __WXMGL__

 
 

-wxAppBase::wxAppBase()
+        // terminator
+        {
+            wxCMD_LINE_NONE,
+            wxEmptyString,
+            wxEmptyString,
+            wxEmptyString,
+            wxCMD_LINE_VAL_NONE,
+            0x0
+        }
+    };
+
+    parser.SetDesc(cmdLineGUIDesc);
+}
+
+bool wxAppBase::OnCmdLineParsed(wxCmdLineParser& parser)

 {
 {

-    wxTheApp = (wxApp *)this;
+#ifdef __WXUNIVERSAL__
+    wxString themeName;
+    if ( parser.Found(OPTION_THEME, &themeName) )
+    {
+        wxTheme *theme = wxTheme::Create(themeName);
+        if ( !theme )
+        {
+            wxLogError(_("Unsupported theme '%s'."), themeName.c_str());
+            return false;
+        }

 
 

-    // VZ: what's this? is it obsolete?
-    m_wantDebugOutput = FALSE;
+        // Delete the defaultly created theme and set the new theme.
+        delete wxTheme::Get();
+        wxTheme::Set(theme);
+    }
+#endif // __WXUNIVERSAL__

 
 

-#if wxUSE_GUI
-    m_topWindow = (wxWindow *)NULL;
-    m_useBestVisual = FALSE;
-    m_exitOnFrameDelete = TRUE;
-    m_isActive = TRUE;
-#endif // wxUSE_GUI
+#if defined(__WXMGL__)
+    wxString modeDesc;
+    if ( parser.Found(OPTION_MODE, &modeDesc) )
+    {
+        unsigned w, h, bpp;
+        if ( wxSscanf(modeDesc.c_str(), _T("%ux%u-%u"), &w, &h, &bpp) != 3 )
+        {
+            wxLogError(_("Invalid display mode specification '%s'."), modeDesc.c_str());
+            return false;
+        }
+
+        if ( !SetDisplayMode(wxVideoMode(w, h, bpp)) )
+            return false;
+    }
+#endif // __WXMGL__
+
+    return wxAppConsole::OnCmdLineParsed(parser);
+}
+
+#endif // wxUSE_CMDLINE_PARSER
+
+// ----------------------------------------------------------------------------
+// main event loop implementation
+// ----------------------------------------------------------------------------
+
+int wxAppBase::MainLoop()
+{
+    wxEventLoopTiedPtr mainLoop(&m_mainLoop, new wxEventLoop);
+
+    return m_mainLoop->Run();
+}
+
+void wxAppBase::ExitMainLoop()
+{
+    // we should exit from the main event loop, not just any currently active
+    // (e.g. modal dialog) event loop
+    if ( m_mainLoop && m_mainLoop->IsRunning() )
+    {
+        m_mainLoop->Exit(0);
+    }
+}
+
+bool wxAppBase::Pending()
+{
+    // use the currently active message loop here, not m_mainLoop, because if
+    // we're showing a modal dialog (with its own event loop) currently the
+    // main event loop is not running anyhow
+    wxEventLoop * const loop = wxEventLoop::GetActive();
+
+    return loop && loop->Pending();
+}
+
+bool wxAppBase::Dispatch()
+{
+    // see comment in Pending()
+    wxEventLoop * const loop = wxEventLoop::GetActive();
+
+    return loop && loop->Dispatch();

 }
 
 // ----------------------------------------------------------------------------
 }
 
 // ----------------------------------------------------------------------------

-// initialization and termination
+// OnXXX() hooks

 // ----------------------------------------------------------------------------
 
 // ----------------------------------------------------------------------------
 

-#if wxUSE_GUI

 bool wxAppBase::OnInitGui()
 {
 #ifdef __WXUNIVERSAL__
 bool wxAppBase::OnInitGui()
 {
 #ifdef __WXUNIVERSAL__

-    if ( !wxTheme::CreateDefault() )
-        return FALSE;
+    if ( !wxTheme::Get() && !wxTheme::CreateDefault() )
+        return false;

 #endif // __WXUNIVERSAL__
 
 #endif // __WXUNIVERSAL__
 

-    return TRUE;
+    return true;

 }
 }

-#endif // wxUSE_GUI

 
 

-int wxAppBase::OnExit()
+int wxAppBase::OnRun()

 {
 {

-#if wxUSE_CONFIG
-    // delete the config object if any (don't use Get() here, but Set()
-    // because Get() could create a new config object)
-    delete wxConfigBase::Set((wxConfigBase *) NULL);
-#endif // wxUSE_CONFIG
+    // 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__
 
 #ifdef __WXUNIVERSAL__
     delete wxTheme::Set(NULL);
 #endif // __WXUNIVERSAL__
 

-    return 0;
+    return wxAppConsole::OnExit();
+}
+
+void wxAppBase::Exit()
+{
+    ExitMainLoop();
+}
+
+wxAppTraits *wxAppBase::CreateTraits()
+{
+    return new wxGUIAppTraits;

 }
 
 }
 

-// ---------------------------------------------------------------------------
-// wxAppBase
+// ----------------------------------------------------------------------------
+// misc

 // ----------------------------------------------------------------------------
 
 // ----------------------------------------------------------------------------
 

-void wxAppBase::ProcessPendingEvents()
+void wxAppBase::SetActive(bool active, wxWindow * WXUNUSED(lastFocus))

 {
 {

-    // ensure that we're the only thread to modify the pending events list
-    wxENTER_CRIT_SECT( *wxPendingEventsLocker );
+    if ( active == m_isActive )
+        return;
+
+    m_isActive = active;

 
 

-    if ( !wxPendingEvents )
+    wxActivateEvent event(wxEVT_ACTIVATE_APP, active);
+    event.SetEventObject(this);
+
+    (void)ProcessEvent(event);
+}
+
+// ----------------------------------------------------------------------------
+// idle handling
+// ----------------------------------------------------------------------------
+
+void wxAppBase::DeletePendingObjects()
+{
+    wxList::compatibility_iterator node = wxPendingDelete.GetFirst();
+    while (node)

     {
     {

-        wxLEAVE_CRIT_SECT( *wxPendingEventsLocker );
-        return;
+        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();

     }
     }

+}

 
 

-    // iterate until the list becomes empty
-    wxNode *node = wxPendingEvents->First();
+// Returns true if more time is needed.
+bool wxAppBase::ProcessIdle()
+{
+    wxIdleEvent event;
+    bool needMore = false;
+    wxWindowList::compatibility_iterator node = wxTopLevelWindows.GetFirst();

     while (node)
     {
     while (node)
     {

-        wxEvtHandler *handler = (wxEvtHandler *)node->Data();
-        delete 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;

 
 

-        // In ProcessPendingEvents(), new handlers might be add
-        // and we can safely leave the critical section here.
-        wxLEAVE_CRIT_SECT( *wxPendingEventsLocker );
-        handler->ProcessPendingEvents();
-        wxENTER_CRIT_SECT( *wxPendingEventsLocker );
+    wxUpdateUIEvent::ResetUpdateTime();

 
 

-        node = wxPendingEvents->First();
+    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

 
 

-    wxLEAVE_CRIT_SECT( *wxPendingEventsLocker );

 }
 
 // ----------------------------------------------------------------------------
 }
 
 // ----------------------------------------------------------------------------

-// misc
+// exceptions support

 // ----------------------------------------------------------------------------
 
 // ----------------------------------------------------------------------------
 

-#if wxUSE_GUI
+#if wxUSE_EXCEPTIONS

 
 

-void wxAppBase::SetActive(bool active, wxWindow * WXUNUSED(lastFocus))
+bool wxAppBase::OnExceptionInMainLoop()

 {
 {

-    m_isActive = active;
+    throw;
+
+    // some compilers are too stupid to know that we never return after throw
+#if defined(__DMC__) || (defined(_MSC_VER) && _MSC_VER < 1200)
+    return false;
+#endif

 }
 
 }
 

-#endif // wxUSE_GUI
+#endif // wxUSE_EXCEPTIONS
+
+// ----------------------------------------------------------------------------
+// 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