src/motif/app.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        app.cpp
   3 // Purpose:     wxApp
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     17/09/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   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 USE_WX_RESOURCES
  33 #include "wx/resource.h"
  34 #endif
  35
  36 #if USE_POSTSCRIPT
  37 #include "wx/postscrp.h"
  38 #endif
  39
  40 #include <Xm/Xm.h>
  41 #include <X11/Xlib.h>
  42 #include <X11/Xutil.h>
  43 #include <X11/Xresource.h>
  44 #include <X11/Xatom.h>
  45
  46 #include "wx/motif/private.h"
  47
  48 #include <string.h>
  49
  50 extern char *wxBuffer;
  51 extern wxList wxPendingDelete;
  52
  53 wxApp *wxTheApp = NULL;
  54
  55 wxHashTable *wxWidgetHashTable = NULL;
  56
  57 #if !USE_SHARED_LIBRARY
  58 IMPLEMENT_DYNAMIC_CLASS(wxApp, wxEvtHandler)
  59 BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
  60     EVT_IDLE(wxApp::OnIdle)
  61 END_EVENT_TABLE()
  62 #endif
  63
  64 long wxApp::sm_lastMessageTime = 0;
  65
  66 bool wxApp::Initialize()
  67 {
  68 #ifdef __WXMSW__
  69     wxBuffer = new char[1500];
  70 #else
  71     wxBuffer = new char[BUFSIZ + 512];
  72 #endif
  73
  74 #if (WXDEBUG && USE_MEMORY_TRACING) || USE_DEBUG_CONTEXT
  75
  76     streambuf* sBuf = new wxDebugStreamBuf;
  77     ostream* oStr = new ostream(sBuf) ;
  78     wxDebugContext::SetStream(oStr, sBuf);
  79
  80 #endif
  81
  82     wxClassInfo::InitializeClasses();
  83
  84     wxTheColourDatabase = new wxColourDatabase(wxKEY_STRING);
  85     wxTheColourDatabase->Initialize();
  86     wxInitializeStockObjects();
  87
  88 #if USE_WX_RESOURCES
  89     wxInitializeResourceSystem();
  90 #endif
  91
  92   // For PostScript printing
  93 #if USE_POSTSCRIPT
  94     wxInitializePrintSetupData();
  95     wxThePrintPaperDatabase = new wxPrintPaperDatabase;
  96     wxThePrintPaperDatabase->CreateDatabase();
  97 #endif
  98
  99     wxBitmap::InitStandardHandlers();
 100
 101     wxWidgetHashTable = new wxHashTable(wxKEY_INTEGER);
 102
 103     wxModule::RegisterModules();
 104     wxASSERT( wxModule::InitializeModules() == TRUE );
 105
 106     return TRUE;
 107 }
 108
 109 void wxApp::CleanUp()
 110 {
 111     delete wxWidgetHashTable;
 112     wxWidgetHashTable = NULL;
 113
 114     wxModule::CleanUpModules();
 115
 116 #if USE_WX_RESOURCES
 117     wxCleanUpResourceSystem();
 118 #endif
 119
 120     wxDeleteStockObjects() ;
 121
 122     // Destroy all GDI lists, etc.
 123
 124     delete wxTheBrushList;
 125     wxTheBrushList = NULL;
 126
 127     delete wxThePenList;
 128     wxThePenList = NULL;
 129
 130     delete wxTheFontList;
 131     wxTheFontList = NULL;
 132
 133     delete wxTheBitmapList;
 134     wxTheBitmapList = NULL;
 135
 136     delete wxTheColourDatabase;
 137     wxTheColourDatabase = NULL;
 138
 139 #if USE_POSTSCRIPT
 140     wxInitializePrintSetupData(FALSE);
 141     delete wxThePrintPaperDatabase;
 142     wxThePrintPaperDatabase = NULL;
 143 #endif
 144
 145     wxBitmap::CleanUpHandlers();
 146
 147     delete[] wxBuffer;
 148     wxBuffer = NULL;
 149
 150     wxClassInfo::CleanUpClasses();
 151
 152     // do it as the very last thing because everything else can log messages
 153     wxLog::DontCreateOnDemand();
 154     // do it as the very last thing because everything else can log messages
 155     delete wxLog::SetActiveTarget(NULL);
 156 }
 157
 158 int wxEntry( int argc, char *argv[] )
 159 {
 160     if (!wxApp::Initialize())
 161       return FALSE;
 162     if (!wxTheApp)
 163     {
 164       if (!wxApp::GetInitializerFunction())
 165       {
 166         printf( "wxWindows error: No initializer - use IMPLEMENT_APP macro.\n" );
 167         return 0;
 168       };
 169
 170         wxTheApp = (wxApp*) (* wxApp::GetInitializerFunction()) ();
 171     };
 172
 173     if (!wxTheApp)
 174     {
 175       printf( "wxWindows error: wxTheApp == NULL\n" );
 176       return 0;
 177     };
 178
 179     wxTheApp->SetClassName(wxFileNameFromPath(argv[0]));
 180     wxTheApp->SetAppName(wxFileNameFromPath(argv[0]));
 181
 182     wxTheApp->argc = argc;
 183     wxTheApp->argv = argv;
 184
 185     // GUI-specific initialization, such as creating an app context.
 186     wxTheApp->OnInitGui();
 187
 188     // Here frames insert themselves automatically
 189     // into wxTopLevelWindows by getting created
 190     // in OnInit().
 191
 192     if (!wxTheApp->OnInit()) return 0;
 193
 194     int retValue = 0;
 195
 196     if (wxTheApp->Initialized()) retValue = wxTheApp->OnRun();
 197
 198     if (wxTheApp->GetTopWindow())
 199     {
 200       delete wxTheApp->GetTopWindow();
 201       wxTheApp->SetTopWindow(NULL);
 202     }
 203
 204     wxTheApp->DeletePendingObjects();
 205
 206     wxTheApp->OnExit();
 207
 208     wxApp::CleanUp();
 209
 210     delete wxTheApp;
 211     wxTheApp = NULL;
 212
 213 #if (WXDEBUG && USE_MEMORY_TRACING) || USE_DEBUG_CONTEXT
 214     // At this point we want to check if there are any memory
 215     // blocks that aren't part of the wxDebugContext itself,
 216     // as a special case. Then when dumping we need to ignore
 217     // wxDebugContext, too.
 218     if (wxDebugContext::CountObjectsLeft() > 0)
 219     {
 220       wxTrace("There were memory leaks.\n");
 221       wxDebugContext::Dump();
 222       wxDebugContext::PrintStatistics();
 223     }
 224     wxDebugContext::SetStream(NULL, NULL);
 225 #endif
 226
 227     return retValue;
 228 };
 229
 230 // Static member initialization
 231 wxAppInitializerFunction wxApp::m_appInitFn = (wxAppInitializerFunction) NULL;
 232
 233 wxApp::wxApp()
 234 {
 235     m_topWindow = NULL;
 236     wxTheApp = this;
 237     m_className = "";
 238     m_wantDebugOutput = TRUE ;
 239     m_appName = "";
 240     argc = 0;
 241     argv = NULL;
 242     m_printMode = wxPRINT_POSTSCRIPT;
 243     m_exitOnFrameDelete = TRUE;
 244     m_auto3D = TRUE;
 245
 246     m_mainColormap = (WXColormap) NULL;
 247     m_appContext = (WXAppContext) NULL;
 248     m_topLevelWidget = (WXWidget) NULL;
 249     m_maxRequestSize = 0;
 250 }
 251
 252 bool wxApp::Initialized()
 253 {
 254     if (GetTopWindow())
 255       return TRUE;
 256     else
 257       return FALSE;
 258 }
 259
 260 int wxApp::MainLoop()
 261 {
 262     m_keepGoing = TRUE;
 263
 264    /*
 265     * Sit around forever waiting to process X-events. Property Change
 266     * event are handled special, because they have to refer to
 267     * the root window rather than to a widget. therefore we can't
 268     * use an Xt-eventhandler.
 269     */
 270
 271     XSelectInput(XtDisplay((Widget) wxTheApp->GetTopLevelWidget()),
 272                  XDefaultRootWindow(XtDisplay((Widget) wxTheApp->GetTopLevelWidget())),
 273                  PropertyChangeMask);
 274
 275     XEvent event;
 276
 277     // Use this flag to allow breaking the loop via wxApp::ExitMainLoop()
 278     while (m_keepGoing)
 279     {
 280       XtAppNextEvent( (XtAppContext) wxTheApp->GetAppContext(), &event);
 281       if(event.type == PropertyNotify)
 282       {
 283         HandlePropertyChange((WXEvent*) &event);
 284       } else
 285       {
 286         // Terry Gitnick <terryg@scientech.com> - 1/21/98
 287          /* if resize event, don't resize until the last resize event for this
 288             window is recieved. Prevents flicker as windows are resized. */
 289         if (event.type == ResizeRequest)
 290         {
 291            Display *disp = XtDisplay((Widget) wxTheApp->GetTopLevelWidget());
 292            Window win = event.xany.window;
 293            XEvent report;
 294
 295            //  to avoid flicker
 296            report = event;
 297            while( XCheckTypedWindowEvent (disp, win, ResizeRequest, &report));
 298         }
 299
 300         XtDispatchEvent(&event);
 301
 302         DeletePendingObjects();
 303       }
 304     }
 305
 306     return 0;
 307 }
 308
 309 // Returns TRUE if more time is needed.
 310 bool wxApp::ProcessIdle()
 311 {
 312     wxIdleEvent event;
 313     event.SetEventObject(this);
 314     ProcessEvent(event);
 315
 316     return event.MoreRequested();
 317 }
 318
 319 void wxApp::ExitMainLoop()
 320 {
 321     m_keepGoing = FALSE;
 322 }
 323
 324 // Is a message/event pending?
 325 bool wxApp::Pending()
 326 {
 327     XFlush(XtDisplay( (Widget) wxTheApp->GetTopLevelWidget() ));
 328     return (XtAppPending( (XtAppContext) wxTheApp->GetAppContext() ) != 0) ;
 329 }
 330
 331 // Dispatch a message.
 332 void wxApp::Dispatch()
 333 {
 334     XtAppProcessEvent( (XtAppContext) wxTheApp->GetAppContext(), XtIMAll);
 335 }
 336
 337 // This should be redefined in a derived class for
 338 // handling property change events for XAtom IPC.
 339 void wxApp::HandlePropertyChange(WXEvent *event)
 340 {
 341     // by default do nothing special
 342     XtDispatchEvent((XEvent*) event); /* let Motif do the work */
 343 }
 344
 345 void wxApp::OnIdle(wxIdleEvent& event)
 346 {
 347     static bool inOnIdle = FALSE;
 348
 349     // Avoid recursion (via ProcessEvent default case)
 350     if (inOnIdle)
 351       return;
 352
 353     inOnIdle = TRUE;
 354
 355     // 'Garbage' collection of windows deleted with Close().
 356     DeletePendingObjects();
 357
 358     // flush the logged messages if any
 359     wxLog *pLog = wxLog::GetActiveTarget();
 360     if ( pLog != NULL && pLog->HasPendingMessages() )
 361       pLog->Flush();
 362
 363     // Send OnIdle events to all windows
 364     bool needMore = SendIdleEvents();
 365
 366     if (needMore)
 367       event.RequestMore(TRUE);
 368
 369     inOnIdle = FALSE;
 370 }
 371
 372 // Send idle event to all top-level windows
 373 bool wxApp::SendIdleEvents()
 374 {
 375     bool needMore = FALSE;
 376         wxNode* node = wxTopLevelWindows.First();
 377         while (node)
 378         {
 379                 wxWindow* win = (wxWindow*) node->Data();
 380                 if (SendIdleEvents(win))
 381             needMore = TRUE;
 382
 383                 node = node->Next();
 384         }
 385     return needMore;
 386 }
 387
 388 // Send idle event to window and all subwindows
 389 bool wxApp::SendIdleEvents(wxWindow* win)
 390 {
 391     bool needMore = FALSE;
 392
 393         wxIdleEvent event;
 394         event.SetEventObject(win);
 395         win->ProcessEvent(event);
 396
 397     if (event.MoreRequested())
 398         needMore = TRUE;
 399
 400         wxNode* node = win->GetChildren()->First();
 401         while (node)
 402         {
 403                 wxWindow* win = (wxWindow*) node->Data();
 404                 if (SendIdleEvents(win))
 405             needMore = TRUE;
 406
 407                 node = node->Next();
 408         }
 409     return needMore ;
 410 }
 411
 412 void wxApp::DeletePendingObjects()
 413 {
 414     wxNode *node = wxPendingDelete.First();
 415     while (node)
 416     {
 417       wxObject *obj = (wxObject *)node->Data();
 418
 419       delete obj;
 420
 421       if (wxPendingDelete.Member(obj))
 422         delete node;
 423
 424       // Deleting one object may have deleted other pending
 425       // objects, so start from beginning of list again.
 426       node = wxPendingDelete.First();
 427     }
 428 }
 429
 430 wxLog* wxApp::CreateLogTarget()
 431 {
 432     return new wxLogGui;
 433 }
 434
 435 wxWindow* wxApp::GetTopWindow() const
 436 {
 437     if (m_topWindow)
 438         return m_topWindow;
 439     else if (wxTopLevelWindows.Number() > 0)
 440         return (wxWindow*) wxTopLevelWindows.First()->Data();
 441     else
 442         return NULL;
 443 }
 444
 445 // Create an application context
 446 bool wxApp::OnInitGui()
 447 {
 448     XtToolkitInitialize() ;
 449     wxTheApp->m_appContext = (WXAppContext) XtCreateApplicationContext() ;
 450     Display *dpy = XtOpenDisplay((XtAppContext) wxTheApp->m_appContext,(String)NULL,NULL,
 451                             (const char*) wxTheApp->GetClassName(), NULL,
 452 # if XtSpecificationRelease < 5
 453                             0,(Cardinal*) &argc,argv) ;
 454 # else
 455                             0,&argc,argv) ;
 456 # endif
 457     if (!dpy) {
 458       cerr << "wxWindows could not open display for " << wxTheApp->GetClassName() << ": exiting.\n";
 459       exit(-1);
 460     }
 461     wxTheApp->m_topLevelWidget = (WXWidget) XtAppCreateShell((String)NULL, (const char*) wxTheApp->GetClassName(),
 462                                      applicationShellWidgetClass,dpy,
 463                                      NULL,0) ;
 464
 465     // Add general resize proc
 466     XtActionsRec rec;
 467     rec.string = "resize";
 468     rec.proc = (XtActionProc)wxWidgetResizeProc;
 469     XtAppAddActions((XtAppContext) wxTheApp->m_appContext, &rec, 1);
 470
 471     GetMainColormap(dpy);
 472     m_maxRequestSize = XMaxRequestSize((Display*) dpy);
 473
 474     return TRUE;
 475 }
 476
 477 WXColormap wxApp::GetMainColormap(WXDisplay* display)
 478 {
 479     if (!display) /* Must be called first with non-NULL display */
 480       return m_mainColormap;
 481
 482     Colormap c =
 483       DefaultColormapOfScreen(XScreenOfDisplay((Display*) display,
 484                                              DefaultScreen((Display*) display)));
 485
 486     if (!m_mainColormap)
 487       m_mainColormap = (WXColormap) c;
 488
 489     return (WXColormap) c;
 490 }
 491
 492 void wxExit()
 493 {
 494     int retValue = 0;
 495     if (wxTheApp)
 496       retValue = wxTheApp->OnExit();
 497
 498     wxApp::CleanUp();
 499     /*
 500      * Exit in some platform-specific way. Not recommended that the app calls this:
 501      * only for emergencies.
 502      */
 503     exit(retValue);
 504 }
 505
 506 // Yield to other processes
 507 bool wxYield()
 508 {
 509     while (wxTheApp && wxTheApp->Pending())
 510       wxTheApp->Dispatch();
 511     return TRUE;
 512 }
 513