src/gtk/app.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        app.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Created:     01/02/97
   6 // Id:
   7 // Copyright:   (c) 1998 Robert Roebling, Julian Smart and Markus Holzem
   8 // Licence:     wxWindows licence
   9 /////////////////////////////////////////////////////////////////////////////
  10
  11 #ifdef __GNUG__
  12 #pragma implementation "app.h"
  13 #endif
  14
  15 #include "wx/app.h"
  16 #include "wx/gdicmn.h"
  17 #include "wx/utils.h"
  18 #include "wx/postscrp.h"
  19 #include "wx/intl.h"
  20 #include "wx/log.h"
  21 #include "wx/memory.h"
  22 #include "wx/font.h"
  23 #include "wx/settings.h"
  24 #include "wx/resource.h"
  25
  26 #include "unistd.h"
  27
  28 #ifdef USE_GDK_IMLIB
  29 #include "../gdk_imlib/gdk_imlib.h"
  30 #endif
  31
  32 //-----------------------------------------------------------------------------
  33 // global data
  34 //-----------------------------------------------------------------------------
  35
  36 wxApp *wxTheApp = (wxApp *)  NULL;
  37 wxAppInitializerFunction wxApp::m_appInitFn = (wxAppInitializerFunction) NULL;
  38
  39 extern wxList wxPendingDelete;
  40 extern wxResourceCache *wxTheResourceCache;
  41
  42 //-----------------------------------------------------------------------------
  43 // local functions
  44 //-----------------------------------------------------------------------------
  45
  46 extern void wxFlushResources(void);
  47
  48 //-----------------------------------------------------------------------------
  49 // global functions
  50 //-----------------------------------------------------------------------------
  51
  52 void wxExit(void)
  53 {
  54   gtk_main_quit();
  55 }
  56
  57 bool wxYield(void)
  58 {
  59   while (gtk_events_pending() > 0) gtk_main_iteration();
  60   return TRUE;
  61 }
  62
  63 //-----------------------------------------------------------------------------
  64 // wxApp
  65 //-----------------------------------------------------------------------------
  66
  67 IMPLEMENT_DYNAMIC_CLASS(wxApp,wxEvtHandler)
  68
  69 BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
  70     EVT_IDLE(wxApp::OnIdle)
  71 END_EVENT_TABLE()
  72
  73 gint wxapp_idle_callback( gpointer WXUNUSED(data) )
  74 {
  75   if (wxTheApp) while (wxTheApp->ProcessIdle()) {}
  76   usleep( 10000 );
  77   return TRUE;
  78 }
  79
  80 wxApp::wxApp()
  81 {
  82   m_idleTag = 0;
  83   m_topWindow = (wxWindow *) NULL;
  84   m_exitOnFrameDelete = TRUE;
  85   wxTheApp = this;
  86 }
  87
  88 wxApp::~wxApp(void)
  89 {
  90   gtk_idle_remove( m_idleTag );
  91 }
  92
  93 bool wxApp::OnInit(void)
  94 {
  95   return TRUE;
  96 }
  97
  98 bool wxApp::OnInitGui(void)
  99 {
 100   m_idleTag = gtk_idle_add( wxapp_idle_callback, NULL );
 101   return TRUE;
 102 }
 103
 104 int wxApp::OnRun(void)
 105 {
 106   return MainLoop();
 107 }
 108
 109 bool wxApp::ProcessIdle(void)
 110 {
 111   wxIdleEvent event;
 112   event.SetEventObject( this );
 113   ProcessEvent( event );
 114
 115   return event.MoreRequested();
 116 }
 117
 118 void wxApp::OnIdle( wxIdleEvent &event )
 119 {
 120   static bool inOnIdle = FALSE;
 121
 122   // Avoid recursion (via ProcessEvent default case)
 123   if (inOnIdle)
 124     return;
 125
 126   inOnIdle = TRUE;
 127
 128   // 'Garbage' collection of windows deleted with Close().
 129   DeletePendingObjects();
 130
 131   // flush the logged messages if any
 132   wxLog *pLog = wxLog::GetActiveTarget();
 133   if ( pLog != NULL && pLog->HasPendingMessages() )
 134     pLog->Flush();
 135
 136   // Send OnIdle events to all windows
 137   bool needMore = SendIdleEvents();
 138
 139   if (needMore)
 140     event.RequestMore(TRUE);
 141
 142   inOnIdle = FALSE;
 143 }
 144
 145 bool wxApp::SendIdleEvents(void)
 146 {
 147     bool needMore = FALSE;
 148         wxNode* node = wxTopLevelWindows.First();
 149         while (node)
 150         {
 151                 wxWindow* win = (wxWindow*) node->Data();
 152                 if (SendIdleEvents(win))
 153             needMore = TRUE;
 154
 155                 node = node->Next();
 156         }
 157     return needMore;
 158 }
 159
 160 bool wxApp::SendIdleEvents( wxWindow* win )
 161 {
 162     bool needMore = FALSE;
 163
 164         wxIdleEvent event;
 165         event.SetEventObject(win);
 166         win->ProcessEvent(event);
 167
 168     if (event.MoreRequested())
 169         needMore = TRUE;
 170
 171         wxNode* node = win->GetChildren()->First();
 172         while (node)
 173         {
 174                 wxWindow* win = (wxWindow*) node->Data();
 175                 if (SendIdleEvents(win))
 176             needMore = TRUE;
 177
 178                 node = node->Next();
 179         }
 180     return needMore ;
 181 }
 182
 183 int wxApp::OnExit(void)
 184 {
 185   return 0;
 186 }
 187
 188 int wxApp::MainLoop(void)
 189 {
 190   gtk_main();
 191   return 0;
 192 }
 193
 194 void wxApp::ExitMainLoop(void)
 195 {
 196   gtk_main_quit();
 197 }
 198
 199 bool wxApp::Initialized(void)
 200 {
 201   return m_initialized;
 202 }
 203
 204 bool wxApp::Pending(void)
 205 {
 206   return FALSE;
 207 }
 208
 209 void wxApp::Dispatch(void)
 210 {
 211 }
 212
 213 void wxApp::DeletePendingObjects(void)
 214 {
 215   wxNode *node = wxPendingDelete.First();
 216   while (node)
 217   {
 218     wxObject *obj = (wxObject *)node->Data();
 219
 220     delete obj;
 221
 222     if (wxPendingDelete.Member(obj))
 223       delete node;
 224
 225     node = wxPendingDelete.First();
 226   }
 227 }
 228
 229 wxWindow *wxApp::GetTopWindow(void)
 230 {
 231   if (m_topWindow) return m_topWindow;
 232   wxNode *node = wxTopLevelWindows.First();
 233   if (!node) return (wxWindow *) NULL;
 234   return (wxWindow*)node->Data();
 235 }
 236
 237 void wxApp::SetTopWindow( wxWindow *win )
 238 {
 239   m_topWindow = win;
 240 }
 241
 242 void wxApp::CommonInit(void)
 243 {
 244
 245 /*
 246 #if USE_RESOURCES
 247   (void) wxGetResource("wxWindows", "OsVersion", &wxOsVersion);
 248 #endif
 249 */
 250   wxSystemSettings::Init();
 251   wxTheResourceCache = new wxResourceCache(wxKEY_STRING);
 252
 253   wxTheFontNameDirectory =  new wxFontNameDirectory;
 254   wxTheFontNameDirectory->Initialize();
 255
 256   wxTheColourDatabase = new wxColourDatabase(wxKEY_STRING);
 257   wxTheColourDatabase->Initialize();
 258
 259   wxInitializeStockLists();
 260   wxInitializeStockObjects();
 261
 262   wxInitializeResourceSystem();
 263
 264   // For PostScript printing
 265 #if USE_POSTSCRIPT
 266   wxInitializePrintSetupData();
 267   wxThePrintPaperDatabase = new wxPrintPaperDatabase;
 268   wxThePrintPaperDatabase->CreateDatabase();
 269 #endif
 270
 271
 272 /*
 273   wxBitmap::InitStandardHandlers();
 274
 275   g_globalCursor = new wxCursor;
 276 */
 277 }
 278
 279 void wxApp::CommonCleanUp(void)
 280 {
 281   wxDELETE(wxTheColourDatabase);
 282   wxDELETE(wxThePrintPaperDatabase);
 283   wxDELETE(wxThePrintSetupData);
 284   wxDELETE(wxTheFontNameDirectory);
 285   wxDeleteStockObjects();
 286
 287   wxFlushResources();
 288
 289   wxDELETE(wxTheResourceCache);
 290
 291   wxDeleteStockLists();
 292
 293   wxCleanUpResourceSystem();
 294
 295   wxSystemSettings::Done();
 296 }
 297
 298 wxLog *wxApp::CreateLogTarget()
 299 {
 300   return new wxLogGui;
 301 }
 302
 303 //-----------------------------------------------------------------------------
 304 // wxEntry
 305 //-----------------------------------------------------------------------------
 306
 307 int wxEntry( int argc, char *argv[] )
 308 {
 309   wxBuffer = new char[BUFSIZ + 512];
 310
 311   wxClassInfo::InitializeClasses();
 312
 313 #if (WXDEBUG && USE_MEMORY_TRACING) || USE_DEBUG_CONTEXT
 314
 315 #if !defined(_WINDLL)
 316   streambuf* sBuf = new wxDebugStreamBuf;
 317 #else
 318   streambuf* sBuf = NULL;
 319 #endif
 320   ostream* oStr = new ostream(sBuf) ;
 321   wxDebugContext::SetStream(oStr, sBuf);
 322
 323 #endif
 324
 325   if (!wxTheApp)
 326   {
 327     if (!wxApp::GetInitializerFunction())
 328     {
 329       printf( "wxWindows error: No initializer - use IMPLEMENT_APP macro.\n" );
 330       return 0;
 331     }
 332
 333     wxAppInitializerFunction app_ini = wxApp::GetInitializerFunction();
 334
 335     wxObject *test_app = app_ini();
 336
 337     wxTheApp = (wxApp*) test_app;
 338   }
 339
 340   if (!wxTheApp)
 341   {
 342     printf( "wxWindows error: wxTheApp == NULL\n" );
 343     return 0;
 344   }
 345
 346   wxTheApp->argc = argc;
 347   wxTheApp->argv = argv;
 348
 349   gtk_set_locale();
 350
 351   gtk_init( &argc, &argv );
 352
 353 #ifdef USE_GDK_IMLIB
 354
 355   gdk_imlib_init();
 356
 357   gtk_widget_push_visual(gdk_imlib_get_visual());
 358
 359   gtk_widget_push_colormap(gdk_imlib_get_colormap());
 360
 361 #endif
 362
 363   wxApp::CommonInit();
 364
 365   wxTheApp->OnInitGui();
 366
 367   // Here frames insert themselves automatically
 368   // into wxTopLevelWindows by getting created
 369   // in OnInit().
 370
 371   if (!wxTheApp->OnInit()) return 0;
 372
 373   wxTheApp->m_initialized = (wxTopLevelWindows.Number() > 0);
 374
 375   int retValue = 0;
 376
 377   if (wxTheApp->Initialized()) retValue = wxTheApp->OnRun();
 378
 379   wxTheApp->DeletePendingObjects();
 380
 381   wxTheApp->OnExit();
 382
 383   wxApp::CommonCleanUp();
 384
 385   wxDELETE(wxTheApp);
 386
 387 #if (WXDEBUG && USE_MEMORY_TRACING) || USE_DEBUG_CONTEXT
 388   // At this point we want to check if there are any memory
 389   // blocks that aren't part of the wxDebugContext itself,
 390   // as a special case. Then when dumping we need to ignore
 391   // wxDebugContext, too.
 392   if (wxDebugContext::CountObjectsLeft() > 0)
 393   {
 394     wxTrace("There were memory leaks.\n");
 395     wxDebugContext::Dump();
 396     wxDebugContext::PrintStatistics();
 397   }
 398   wxDebugContext::SetStream(NULL, NULL);
 399 #endif
 400
 401   return retValue;
 402 }
 403
 404 //-----------------------------------------------------------------------------
 405 // main()
 406 //-----------------------------------------------------------------------------
 407
 408 #if defined(AIX) || defined(AIX4) || defined(____HPUX__) || defined(NOMAIN)
 409
 410  // main in IMPLEMENT_WX_MAIN in IMPLEMENT_APP in app.h
 411
 412 #else
 413
 414   int main(int argc, char *argv[]) { return wxEntry(argc, argv); }
 415
 416 #endif
 417
 418