src/stubs/app.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        app.cpp
   3 // Purpose:     wxApp
   4 // Author:      AUTHOR
   5 // Modified by:
   6 // Created:     ??/??/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) AUTHOR
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13 #pragma implementation "app.h"
  14 #endif
  15
  16 #include "wx/frame.h"
  17 #include "wx/app.h"
  18 #include "wx/utils.h"
  19 #include "wx/gdicmn.h"
  20 #include "wx/pen.h"
  21 #include "wx/brush.h"
  22 #include "wx/cursor.h"
  23 #include "wx/icon.h"
  24 #include "wx/palette.h"
  25 #include "wx/dc.h"
  26 #include "wx/dialog.h"
  27 #include "wx/msgdlg.h"
  28 #include "wx/log.h"
  29 #include "wx/module.h"
  30 #include "wx/memory.h"
  31
  32 #if wxUSE_WX_RESOURCES
  33 #include "wx/resource.h"
  34 #endif
  35
  36 #if wxUSE_POSTSCRIPT
  37 #include "wx/postscrp.h"
  38 #endif
  39
  40 #include <string.h>
  41
  42 extern char *wxBuffer;
  43 extern wxList wxPendingDelete;
  44
  45 wxApp *wxTheApp = NULL;
  46
  47 #if !USE_SHARED_LIBRARY
  48 IMPLEMENT_DYNAMIC_CLASS(wxApp, wxEvtHandler)
  49 BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
  50     EVT_IDLE(wxApp::OnIdle)
  51 END_EVENT_TABLE()
  52 #endif
  53
  54 long wxApp::sm_lastMessageTime = 0;
  55
  56 bool wxApp::Initialize()
  57 {
  58 #ifdef __WXMSW__
  59   wxBuffer = new char[1500];
  60 #else
  61   wxBuffer = new char[BUFSIZ + 512];
  62 #endif
  63
  64 #if (WXDEBUG && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
  65
  66   streambuf* sBuf = new wxDebugStreamBuf;
  67   ostream* oStr = new ostream(sBuf) ;
  68   wxDebugContext::SetStream(oStr, sBuf);
  69
  70 #endif
  71
  72   wxClassInfo::InitializeClasses();
  73
  74   wxTheColourDatabase = new wxColourDatabase(wxKEY_STRING);
  75   wxTheColourDatabase->Initialize();
  76   wxInitializeStockObjects();
  77
  78 #if wxUSE_WX_RESOURCES
  79   wxInitializeResourceSystem();
  80 #endif
  81
  82   // For PostScript printing
  83 #if wxUSE_POSTSCRIPT
  84   wxInitializePrintSetupData();
  85   wxThePrintPaperDatabase = new wxPrintPaperDatabase;
  86   wxThePrintPaperDatabase->CreateDatabase();
  87 #endif
  88
  89   wxBitmap::InitStandardHandlers();
  90
  91   wxModule::RegisterModules();
  92   wxASSERT( wxModule::InitializeModules() == TRUE );
  93
  94   return TRUE;
  95 }
  96
  97 void wxApp::CleanUp()
  98 {
  99   wxModule::CleanUpModules();
 100
 101 #if wxUSE_WX_RESOURCES
 102   wxCleanUpResourceSystem();
 103 #endif
 104
 105   wxDeleteStockObjects() ;
 106
 107   // Destroy all GDI lists, etc.
 108
 109   delete wxTheBrushList;
 110   wxTheBrushList = NULL;
 111
 112   delete wxThePenList;
 113   wxThePenList = NULL;
 114
 115   delete wxTheFontList;
 116   wxTheFontList = NULL;
 117
 118   delete wxTheBitmapList;
 119   wxTheBitmapList = NULL;
 120
 121   delete wxTheColourDatabase;
 122   wxTheColourDatabase = NULL;
 123
 124 #if wxUSE_POSTSCRIPT
 125   wxInitializePrintSetupData(FALSE);
 126   delete wxThePrintPaperDatabase;
 127   wxThePrintPaperDatabase = NULL;
 128 #endif
 129
 130   wxBitmap::CleanUpHandlers();
 131
 132   delete[] wxBuffer;
 133   wxBuffer = NULL;
 134
 135   wxClassInfo::CleanUpClasses();
 136
 137   // do it as the very last thing because everything else can log messages
 138   wxLog::DontCreateOnDemand();
 139   // do it as the very last thing because everything else can log messages
 140   delete wxLog::SetActiveTarget(NULL);
 141 }
 142
 143 int wxEntry( int argc, char *argv[] )
 144 {
 145   if (!wxApp::Initialize())
 146     return FALSE;
 147   if (!wxTheApp)
 148   {
 149     if (!wxApp::GetInitializerFunction())
 150     {
 151       printf( "wxWindows error: No initializer - use IMPLEMENT_APP macro.\n" );
 152       return 0;
 153     };
 154
 155         wxTheApp = (wxApp*) (* wxApp::GetInitializerFunction()) ();
 156   };
 157
 158   if (!wxTheApp)
 159   {
 160     printf( "wxWindows error: wxTheApp == NULL\n" );
 161     return 0;
 162   };
 163
 164   wxTheApp->argc = argc;
 165   wxTheApp->argv = argv;
 166
 167   // GUI-specific initialization, such as creating an app context.
 168   wxTheApp->OnInitGui();
 169
 170   // Here frames insert themselves automatically
 171   // into wxTopLevelWindows by getting created
 172   // in OnInit().
 173
 174   if (!wxTheApp->OnInit()) return 0;
 175
 176   int retValue = 0;
 177
 178   if (wxTheApp->Initialized()) retValue = wxTheApp->OnRun();
 179
 180   if (wxTheApp->GetTopWindow())
 181   {
 182     delete wxTheApp->GetTopWindow();
 183     wxTheApp->SetTopWindow(NULL);
 184   }
 185
 186   wxTheApp->DeletePendingObjects();
 187
 188   wxTheApp->OnExit();
 189
 190   wxApp::CleanUp();
 191
 192   delete wxTheApp;
 193   wxTheApp = NULL;
 194
 195 #if (WXDEBUG && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 196   // At this point we want to check if there are any memory
 197   // blocks that aren't part of the wxDebugContext itself,
 198   // as a special case. Then when dumping we need to ignore
 199   // wxDebugContext, too.
 200   if (wxDebugContext::CountObjectsLeft() > 0)
 201   {
 202     wxTrace("There were memory leaks.\n");
 203     wxDebugContext::Dump();
 204     wxDebugContext::PrintStatistics();
 205   }
 206   wxDebugContext::SetStream(NULL, NULL);
 207 #endif
 208
 209   return retValue;
 210 };
 211
 212 // Static member initialization
 213 wxAppInitializerFunction wxApp::m_appInitFn = (wxAppInitializerFunction) NULL;
 214
 215 wxApp::wxApp()
 216 {
 217   m_topWindow = NULL;
 218   wxTheApp = this;
 219   m_className = "";
 220   m_wantDebugOutput = TRUE ;
 221   m_appName = "";
 222   argc = 0;
 223   argv = NULL;
 224 #ifdef __WXMSW__
 225   m_printMode = wxPRINT_WINDOWS;
 226 #else
 227   m_printMode = wxPRINT_POSTSCRIPT;
 228 #endif
 229   m_exitOnFrameDelete = TRUE;
 230   m_auto3D = TRUE;
 231 }
 232
 233 bool wxApp::Initialized()
 234 {
 235   if (GetTopWindow())
 236     return TRUE;
 237   else
 238     return FALSE;
 239 }
 240
 241 int wxApp::MainLoop()
 242 {
 243   m_keepGoing = TRUE;
 244
 245 /* TODO: implement your main loop here, calling ProcessIdle in idle time.
 246   while (m_keepGoing)
 247   {
 248     while (!::PeekMessage(&s_currentMsg, 0, 0, 0, PM_NOREMOVE) &&
 249            ProcessIdle()) {}
 250     if (!DoMessage())
 251       m_keepGoing = FALSE;
 252   }
 253 */
 254
 255   return 0;
 256 }
 257
 258 // Returns TRUE if more time is needed.
 259 bool wxApp::ProcessIdle()
 260 {
 261     wxIdleEvent event;
 262     event.SetEventObject(this);
 263     ProcessEvent(event);
 264
 265     return event.MoreRequested();
 266 }
 267
 268 void wxApp::ExitMainLoop()
 269 {
 270   m_keepGoing = FALSE;
 271 }
 272
 273 // Is a message/event pending?
 274 bool wxApp::Pending()
 275 {
 276 /* TODO.
 277  */
 278   return FALSE;
 279 }
 280
 281 // Dispatch a message.
 282 void wxApp::Dispatch()
 283 {
 284 /* TODO.
 285  */
 286 }
 287
 288 void wxApp::OnIdle(wxIdleEvent& event)
 289 {
 290   static bool inOnIdle = FALSE;
 291
 292   // Avoid recursion (via ProcessEvent default case)
 293   if (inOnIdle)
 294     return;
 295
 296   inOnIdle = TRUE;
 297
 298   // 'Garbage' collection of windows deleted with Close().
 299   DeletePendingObjects();
 300
 301   // flush the logged messages if any
 302   wxLog *pLog = wxLog::GetActiveTarget();
 303   if ( pLog != NULL && pLog->HasPendingMessages() )
 304     pLog->Flush();
 305
 306   // Send OnIdle events to all windows
 307   bool needMore = SendIdleEvents();
 308
 309   if (needMore)
 310     event.RequestMore(TRUE);
 311
 312   inOnIdle = FALSE;
 313 }
 314
 315 // Send idle event to all top-level windows
 316 bool wxApp::SendIdleEvents()
 317 {
 318     bool needMore = FALSE;
 319         wxNode* node = wxTopLevelWindows.First();
 320         while (node)
 321         {
 322                 wxWindow* win = (wxWindow*) node->Data();
 323                 if (SendIdleEvents(win))
 324             needMore = TRUE;
 325
 326                 node = node->Next();
 327         }
 328     return needMore;
 329 }
 330
 331 // Send idle event to window and all subwindows
 332 bool wxApp::SendIdleEvents(wxWindow* win)
 333 {
 334     bool needMore = FALSE;
 335
 336         wxIdleEvent event;
 337         event.SetEventObject(win);
 338         win->ProcessEvent(event);
 339
 340     if (event.MoreRequested())
 341         needMore = TRUE;
 342
 343         wxNode* node = win->GetChildren()->First();
 344         while (node)
 345         {
 346                 wxWindow* win = (wxWindow*) node->Data();
 347                 if (SendIdleEvents(win))
 348             needMore = TRUE;
 349
 350                 node = node->Next();
 351         }
 352     return needMore ;
 353 }
 354
 355 void wxApp::DeletePendingObjects()
 356 {
 357   wxNode *node = wxPendingDelete.First();
 358   while (node)
 359   {
 360     wxObject *obj = (wxObject *)node->Data();
 361
 362     delete obj;
 363
 364     if (wxPendingDelete.Member(obj))
 365       delete node;
 366
 367     // Deleting one object may have deleted other pending
 368     // objects, so start from beginning of list again.
 369     node = wxPendingDelete.First();
 370   }
 371 }
 372
 373 wxLog* wxApp::CreateLogTarget()
 374 {
 375     return new wxLogGui;
 376 }
 377
 378 wxWindow* wxApp::GetTopWindow() const
 379 {
 380     if (m_topWindow)
 381         return m_topWindow;
 382     else if (wxTopLevelWindows.Number() > 0)
 383         return (wxWindow*) wxTopLevelWindows.First()->Data();
 384     else
 385         return NULL;
 386 }
 387
 388 void wxExit()
 389 {
 390   wxApp::CleanUp();
 391 /*
 392  * TODO: Exit in some platform-specific way. Not recommended that the app calls this:
 393  * only for emergencies.
 394  */
 395 }
 396
 397 // Yield to other processes
 398 bool wxYield()
 399 {
 400   /*
 401    * TODO
 402    */
 403   return TRUE;
 404 }
 405