Version 0.4 of wxPython for MSW.

[wxWidgets.git] / src / gtk1 / app.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        app.cpp
// Purpose:
// Author:      Robert Roebling
// Created:     01/02/97
// Id:
// Copyright:   (c) 1998 Robert Roebling, Julian Smart and Markus Holzem
// Licence:   	wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#ifdef __GNUG__
#pragma implementation "app.h"
#endif

#include "wx/app.h"
#include "wx/gdicmn.h"
#include "wx/utils.h"
#include "wx/postscrp.h"
#include "wx/intl.h"
#include "wx/log.h"
#include "wx/memory.h"
#include "wx/font.h"
#include "wx/settings.h"
#include "wx/resource.h"

#include "unistd.h"

#ifdef wxUSE_GDK_IMLIB
#include "../gdk_imlib/gdk_imlib.h"
#endif

//-----------------------------------------------------------------------------
// global data
//-----------------------------------------------------------------------------

wxApp *wxTheApp = (wxApp *)  NULL;
wxAppInitializerFunction wxApp::m_appInitFn = (wxAppInitializerFunction) NULL;

extern wxList wxPendingDelete;
extern wxResourceCache *wxTheResourceCache;

//-----------------------------------------------------------------------------
// local functions
//-----------------------------------------------------------------------------

extern void wxFlushResources(void);

//-----------------------------------------------------------------------------
// global functions
//-----------------------------------------------------------------------------

void wxExit(void)
{
  gtk_main_quit();
}

bool wxYield(void)
{
  while (gtk_events_pending() > 0) gtk_main_iteration();
  return TRUE;
}

//-----------------------------------------------------------------------------
// wxApp
//-----------------------------------------------------------------------------

IMPLEMENT_DYNAMIC_CLASS(wxApp,wxEvtHandler)

BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
    EVT_IDLE(wxApp::OnIdle)
END_EVENT_TABLE()

gint wxapp_idle_callback( gpointer WXUNUSED(data) )
{
  if (wxTheApp) while (wxTheApp->ProcessIdle()) {}
  usleep( 10000 );
  return TRUE;
}

wxApp::wxApp()
{
  m_idleTag = 0;
  m_topWindow = (wxWindow *) NULL;
  m_exitOnFrameDelete = TRUE;
  wxTheApp = this;
}

wxApp::~wxApp(void)
{
  gtk_idle_remove( m_idleTag );
}

bool wxApp::OnInit(void)
{
  return TRUE;
}

bool wxApp::OnInitGui(void)
{
  m_idleTag = gtk_idle_add( wxapp_idle_callback, NULL );
  return TRUE;
}

int wxApp::OnRun(void)
{
  return MainLoop();
}

bool wxApp::ProcessIdle(void)
{
  wxIdleEvent event;
  event.SetEventObject( this );
  ProcessEvent( event );

  return event.MoreRequested();
}

void wxApp::OnIdle( wxIdleEvent &event )
{
  static bool inOnIdle = FALSE;

  // Avoid recursion (via ProcessEvent default case)
  if (inOnIdle)
    return;

  inOnIdle = TRUE;

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

  // flush the logged messages if any
  wxLog *pLog = wxLog::GetActiveTarget();
  if ( pLog != NULL && pLog->HasPendingMessages() )
    pLog->Flush();

  // Send OnIdle events to all windows
  bool needMore = SendIdleEvents();

  if (needMore)
    event.RequestMore(TRUE);

  inOnIdle = FALSE;
}

bool wxApp::SendIdleEvents(void)
{
    bool needMore = FALSE;
	wxNode* node = wxTopLevelWindows.First();
	while (node)
	{
		wxWindow* win = (wxWindow*) node->Data();
		if (SendIdleEvents(win))
            needMore = TRUE;

		node = node->Next();
	}
    return needMore;
}

bool wxApp::SendIdleEvents( wxWindow* win )
{
    bool needMore = FALSE;

	wxIdleEvent event;
	event.SetEventObject(win);
	win->ProcessEvent(event);

    if (event.MoreRequested())
        needMore = TRUE;

	wxNode* node = win->GetChildren()->First();
	while (node)
	{
		wxWindow* win = (wxWindow*) node->Data();
		if (SendIdleEvents(win))
            needMore = TRUE;

		node = node->Next();
	}
    return needMore ;
}

int wxApp::OnExit(void)
{
  return 0;
}

int wxApp::MainLoop(void)
{
  gtk_main();
  return 0;
}

void wxApp::ExitMainLoop(void)
{
  gtk_main_quit();
}

bool wxApp::Initialized(void)
{
  return m_initialized;
}

bool wxApp::Pending(void)
{
  return FALSE;
}

void wxApp::Dispatch(void)
{
}

void wxApp::DeletePendingObjects(void)
{
  wxNode *node = wxPendingDelete.First();
  while (node)
  {
    wxObject *obj = (wxObject *)node->Data();

    delete obj;

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

    node = wxPendingDelete.First();
  }
}

wxWindow *wxApp::GetTopWindow(void)
{
  if (m_topWindow) return m_topWindow;
  wxNode *node = wxTopLevelWindows.First();
  if (!node) return (wxWindow *) NULL;
  return (wxWindow*)node->Data();
}

void wxApp::SetTopWindow( wxWindow *win )
{
  m_topWindow = win;
}

void wxApp::CommonInit(void)
{

/*
#if wxUSE_RESOURCES
  (void) wxGetResource("wxWindows", "OsVersion", &wxOsVersion);
#endif
*/
  wxSystemSettings::Init();
  wxTheResourceCache = new wxResourceCache(wxKEY_STRING);

  wxTheFontNameDirectory =  new wxFontNameDirectory;
  wxTheFontNameDirectory->Initialize();

  wxTheColourDatabase = new wxColourDatabase(wxKEY_STRING);
  wxTheColourDatabase->Initialize();

  wxInitializeStockLists();
  wxInitializeStockObjects();

  wxInitializeResourceSystem();

  // For PostScript printing
#if wxUSE_POSTSCRIPT
  wxInitializePrintSetupData();
  wxThePrintPaperDatabase = new wxPrintPaperDatabase;
  wxThePrintPaperDatabase->CreateDatabase();
#endif


/*
  wxBitmap::InitStandardHandlers();

  g_globalCursor = new wxCursor;
*/
}

void wxApp::CommonCleanUp(void)
{
  wxDELETE(wxTheColourDatabase);
  wxDELETE(wxThePrintPaperDatabase);
  wxDELETE(wxThePrintSetupData);
  wxDELETE(wxTheFontNameDirectory);
  wxDeleteStockObjects();

  wxFlushResources();

  wxDELETE(wxTheResourceCache);

  wxDeleteStockLists();

  wxCleanUpResourceSystem();

  wxSystemSettings::Done();
}

wxLog *wxApp::CreateLogTarget()
{
  return new wxLogGui;
}

//-----------------------------------------------------------------------------
// wxEntry
//-----------------------------------------------------------------------------

int wxEntry( int argc, char *argv[] )
{
  wxBuffer = new char[BUFSIZ + 512];

  wxClassInfo::InitializeClasses();

#if (WXDEBUG && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT

  streambuf* sBuf = new wxDebugStreamBuf;
  ostream* oStr = new ostream(sBuf) ;
  wxDebugContext::SetStream(oStr, sBuf);

#endif

  if (!wxTheApp)
  {
    if (!wxApp::GetInitializerFunction())
    {
      printf( "wxWindows error: No initializer - use IMPLEMENT_APP macro.\n" );
      return 0;
    }

    wxAppInitializerFunction app_ini = wxApp::GetInitializerFunction();

    wxObject *test_app = app_ini();

    wxTheApp = (wxApp*) test_app;
  }

  if (!wxTheApp)
  {
    printf( "wxWindows error: wxTheApp == NULL\n" );
    return 0;
  }

  wxTheApp->argc = argc;
  wxTheApp->argv = argv;

  char name[200];
  strcpy( name, argv[0] );
  strcpy( name, wxFileNameFromPath(name) );
  wxStripExtension( name );
  wxTheApp->SetAppName( name );
  
  gtk_set_locale();
  
  gtk_init( &argc, &argv );

#ifdef wxUSE_GDK_IMLIB

  gdk_imlib_init();

  gtk_widget_push_visual(gdk_imlib_get_visual());

  gtk_widget_push_colormap(gdk_imlib_get_colormap());

#endif

  wxApp::CommonInit();

  wxTheApp->OnInitGui();

  // Here frames insert themselves automatically
  // into wxTopLevelWindows by getting created
  // in OnInit().

  if (!wxTheApp->OnInit()) return 0;

  wxTheApp->m_initialized = (wxTopLevelWindows.Number() > 0);

  int retValue = 0;

  if (wxTheApp->Initialized()) retValue = wxTheApp->OnRun();

  wxTheApp->DeletePendingObjects();

  wxTheApp->OnExit();

  wxApp::CommonCleanUp();

  wxDELETE(wxTheApp);

  wxLog *oldLog = wxLog::SetActiveTarget( NULL );
  if (oldLog) delete oldLog;
  
  wxClassInfo::CleanUpClasses();
  
  delete[] wxBuffer;
  
#if (WXDEBUG && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
  
  if (wxDebugContext::CountObjectsLeft() > 0)
  {
    wxTrace("There were memory leaks.\n");
    wxDebugContext::Dump();
    wxDebugContext::PrintStatistics();
  }
  wxDebugContext::SetStream(NULL, NULL);
  
#endif

  return retValue;
}

//-----------------------------------------------------------------------------
// main()
//-----------------------------------------------------------------------------

#if defined(AIX) || defined(AIX4) || defined(____HPUX__) || defined(NOMAIN)

 // main in IMPLEMENT_WX_MAIN in IMPLEMENT_APP in app.h

#else

  int main(int argc, char *argv[]) { return wxEntry(argc, argv); }

#endif