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 wxUSE_WX_RESOURCES
  33 #include "wx/resource.h"
  34 #endif
  35
  36 #include <Xm/Xm.h>
  37 #include <X11/Xlib.h>
  38 #include <X11/Xutil.h>
  39 #include <X11/Xresource.h>
  40 #include <X11/Xatom.h>
  41
  42 #include "wx/motif/private.h"
  43
  44 #include <string.h>
  45
  46 extern char *wxBuffer;
  47 extern wxList wxPendingDelete;
  48
  49 wxApp *wxTheApp = NULL;
  50
  51 wxHashTable *wxWidgetHashTable = NULL;
  52
  53 #if !USE_SHARED_LIBRARY
  54 IMPLEMENT_DYNAMIC_CLASS(wxApp, wxEvtHandler)
  55 BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
  56     EVT_IDLE(wxApp::OnIdle)
  57 END_EVENT_TABLE()
  58 #endif
  59
  60 long wxApp::sm_lastMessageTime = 0;
  61
  62 bool wxApp::Initialize()
  63 {
  64 #ifdef __WXMSW__
  65     wxBuffer = new char[1500];
  66 #else
  67     wxBuffer = new char[BUFSIZ + 512];
  68 #endif
  69
  70 #if (WXDEBUG && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
  71
  72     streambuf* sBuf = new wxDebugStreamBuf;
  73     ostream* oStr = new ostream(sBuf) ;
  74     wxDebugContext::SetStream(oStr, sBuf);
  75
  76 #endif
  77
  78     wxClassInfo::InitializeClasses();
  79
  80     wxTheColourDatabase = new wxColourDatabase(wxKEY_STRING);
  81     wxTheColourDatabase->Initialize();
  82
  83     wxInitializeStockLists();
  84     wxInitializeStockObjects();
  85
  86 #if wxUSE_WX_RESOURCES
  87     wxInitializeResourceSystem();
  88 #endif
  89
  90   // For PostScript printing
  91 #if wxUSE_POSTSCRIPT
  92 /* Done using wxModule now
  93     wxInitializePrintSetupData();
  94     wxThePrintPaperDatabase = new wxPrintPaperDatabase;
  95     wxThePrintPaperDatabase->CreateDatabase();
  96 */
  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 wxUSE_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 wxUSE_POSTSCRIPT
 140 /* Done using wxModule now
 141     wxInitializePrintSetupData(FALSE);
 142     delete wxThePrintPaperDatabase;
 143     wxThePrintPaperDatabase = NULL;
 144 */
 145 #endif
 146
 147     wxBitmap::CleanUpHandlers();
 148
 149     delete[] wxBuffer;
 150     wxBuffer = NULL;
 151
 152     wxClassInfo::CleanUpClasses();
 153
 154     // do it as the very last thing because everything else can log messages
 155     wxLog::DontCreateOnDemand();
 156     // do it as the very last thing because everything else can log messages
 157     delete wxLog::SetActiveTarget(NULL);
 158 }
 159
 160 int wxEntry( int argc, char *argv[] )
 161 {
 162     if (!wxApp::Initialize())
 163       return FALSE;
 164     if (!wxTheApp)
 165     {
 166       if (!wxApp::GetInitializerFunction())
 167       {
 168         printf( "wxWindows error: No initializer - use IMPLEMENT_APP macro.\n" );
 169         return 0;
 170       };
 171
 172         wxTheApp = (wxApp*) (* wxApp::GetInitializerFunction()) ();
 173     };
 174
 175     if (!wxTheApp)
 176     {
 177       printf( "wxWindows error: wxTheApp == NULL\n" );
 178       return 0;
 179     };
 180
 181     wxTheApp->SetClassName(wxFileNameFromPath(argv[0]));
 182     wxTheApp->SetAppName(wxFileNameFromPath(argv[0]));
 183
 184     wxTheApp->argc = argc;
 185     wxTheApp->argv = argv;
 186
 187     // GUI-specific initialization, such as creating an app context.
 188     wxTheApp->OnInitGui();
 189
 190     // Here frames insert themselves automatically
 191     // into wxTopLevelWindows by getting created
 192     // in OnInit().
 193
 194     if (!wxTheApp->OnInit()) return 0;
 195
 196     int retValue = 0;
 197
 198     if (wxTheApp->Initialized()) retValue = wxTheApp->OnRun();
 199
 200     if (wxTheApp->GetTopWindow())
 201     {
 202       delete wxTheApp->GetTopWindow();
 203       wxTheApp->SetTopWindow(NULL);
 204     }
 205
 206     wxTheApp->DeletePendingObjects();
 207
 208     wxTheApp->OnExit();
 209
 210     wxApp::CleanUp();
 211
 212     delete wxTheApp;
 213     wxTheApp = NULL;
 214
 215 #if (WXDEBUG && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 216     // At this point we want to check if there are any memory
 217     // blocks that aren't part of the wxDebugContext itself,
 218     // as a special case. Then when dumping we need to ignore
 219     // wxDebugContext, too.
 220     if (wxDebugContext::CountObjectsLeft() > 0)
 221     {
 222       wxTrace("There were memory leaks.\n");
 223       wxDebugContext::Dump();
 224       wxDebugContext::PrintStatistics();
 225     }
 226     wxDebugContext::SetStream(NULL, NULL);
 227 #endif
 228
 229     return retValue;
 230 };
 231
 232 // Static member initialization
 233 wxAppInitializerFunction wxApp::m_appInitFn = (wxAppInitializerFunction) NULL;
 234
 235 wxApp::wxApp()
 236 {
 237     m_topWindow = NULL;
 238     wxTheApp = this;
 239     m_className = "";
 240     m_wantDebugOutput = TRUE ;
 241     m_appName = "";
 242     argc = 0;
 243     argv = NULL;
 244     m_printMode = wxPRINT_POSTSCRIPT;
 245     m_exitOnFrameDelete = TRUE;
 246     m_auto3D = TRUE;
 247
 248     m_mainColormap = (WXColormap) NULL;
 249     m_appContext = (WXAppContext) NULL;
 250     m_topLevelWidget = (WXWidget) NULL;
 251     m_maxRequestSize = 0;
 252     m_initialDisplay = (WXDisplay*) 0;
 253 }
 254
 255 bool wxApp::Initialized()
 256 {
 257     if (GetTopWindow())
 258       return TRUE;
 259     else
 260       return FALSE;
 261 }
 262
 263 int wxApp::MainLoop()
 264 {
 265     m_keepGoing = TRUE;
 266
 267    /*
 268     * Sit around forever waiting to process X-events. Property Change
 269     * event are handled special, because they have to refer to
 270     * the root window rather than to a widget. therefore we can't
 271     * use an Xt-eventhandler.
 272     */
 273
 274     XSelectInput(XtDisplay((Widget) wxTheApp->GetTopLevelWidget()),
 275                  XDefaultRootWindow(XtDisplay((Widget) wxTheApp->GetTopLevelWidget())),
 276                  PropertyChangeMask);
 277
 278     XEvent event;
 279
 280     // Use this flag to allow breaking the loop via wxApp::ExitMainLoop()
 281     while (m_keepGoing)
 282     {
 283       XtAppNextEvent( (XtAppContext) wxTheApp->GetAppContext(), &event);
 284       if(event.type == PropertyNotify)
 285       {
 286         HandlePropertyChange((WXEvent*) &event);
 287       } else
 288       {
 289         // Terry Gitnick <terryg@scientech.com> - 1/21/98
 290          /* if resize event, don't resize until the last resize event for this
 291             window is recieved. Prevents flicker as windows are resized. */
 292         if (event.type == ResizeRequest)
 293         {
 294            Display *disp = XtDisplay((Widget) wxTheApp->GetTopLevelWidget());
 295            Window win = event.xany.window;
 296            XEvent report;
 297
 298            //  to avoid flicker
 299            report = event;
 300            while( XCheckTypedWindowEvent (disp, win, ResizeRequest, &report));
 301         }
 302         // TODO: when implementing refresh optimization, we can use
 303         // XtAddExposureToRegion to expand the window's paint region.
 304
 305         XtDispatchEvent(&event);
 306
 307         ProcessIdle();
 308       }
 309     }
 310
 311     return 0;
 312 }
 313
 314 // Returns TRUE if more time is needed.
 315 bool wxApp::ProcessIdle()
 316 {
 317     wxIdleEvent event;
 318     event.SetEventObject(this);
 319     ProcessEvent(event);
 320
 321     return event.MoreRequested();
 322 }
 323
 324 void wxApp::ExitMainLoop()
 325 {
 326     m_keepGoing = FALSE;
 327 }
 328
 329 // Is a message/event pending?
 330 bool wxApp::Pending()
 331 {
 332     XFlush(XtDisplay( (Widget) wxTheApp->GetTopLevelWidget() ));
 333     return (XtAppPending( (XtAppContext) wxTheApp->GetAppContext() ) != 0) ;
 334 }
 335
 336 // Dispatch a message.
 337 void wxApp::Dispatch()
 338 {
 339     XtAppProcessEvent( (XtAppContext) wxTheApp->GetAppContext(), XtIMAll);
 340 }
 341
 342 // This should be redefined in a derived class for
 343 // handling property change events for XAtom IPC.
 344 void wxApp::HandlePropertyChange(WXEvent *event)
 345 {
 346     // by default do nothing special
 347     XtDispatchEvent((XEvent*) event); /* let Motif do the work */
 348 }
 349
 350 void wxApp::OnIdle(wxIdleEvent& event)
 351 {
 352     static bool inOnIdle = FALSE;
 353
 354     // Avoid recursion (via ProcessEvent default case)
 355     if (inOnIdle)
 356       return;
 357
 358     inOnIdle = TRUE;
 359
 360     // 'Garbage' collection of windows deleted with Close().
 361     DeletePendingObjects();
 362
 363     // flush the logged messages if any
 364     wxLog *pLog = wxLog::GetActiveTarget();
 365     if ( pLog != NULL && pLog->HasPendingMessages() )
 366       pLog->Flush();
 367
 368     // Send OnIdle events to all windows
 369     bool needMore = SendIdleEvents();
 370
 371     if (needMore)
 372       event.RequestMore(TRUE);
 373
 374     inOnIdle = FALSE;
 375 }
 376
 377 // Send idle event to all top-level windows
 378 bool wxApp::SendIdleEvents()
 379 {
 380     bool needMore = FALSE;
 381         wxNode* node = wxTopLevelWindows.First();
 382         while (node)
 383         {
 384                 wxWindow* win = (wxWindow*) node->Data();
 385                 if (SendIdleEvents(win))
 386             needMore = TRUE;
 387
 388                 node = node->Next();
 389         }
 390     return needMore;
 391 }
 392
 393 // Send idle event to window and all subwindows
 394 bool wxApp::SendIdleEvents(wxWindow* win)
 395 {
 396     bool needMore = FALSE;
 397
 398         wxIdleEvent event;
 399         event.SetEventObject(win);
 400         win->ProcessEvent(event);
 401
 402     if (event.MoreRequested())
 403         needMore = TRUE;
 404
 405         wxNode* node = win->GetChildren()->First();
 406         while (node)
 407         {
 408                 wxWindow* win = (wxWindow*) node->Data();
 409                 if (SendIdleEvents(win))
 410             needMore = TRUE;
 411
 412                 node = node->Next();
 413         }
 414     return needMore ;
 415 }
 416
 417 void wxApp::DeletePendingObjects()
 418 {
 419     wxNode *node = wxPendingDelete.First();
 420     while (node)
 421     {
 422       wxObject *obj = (wxObject *)node->Data();
 423
 424       delete obj;
 425
 426       if (wxPendingDelete.Member(obj))
 427         delete node;
 428
 429       // Deleting one object may have deleted other pending
 430       // objects, so start from beginning of list again.
 431       node = wxPendingDelete.First();
 432     }
 433 }
 434
 435 wxLog* wxApp::CreateLogTarget()
 436 {
 437     return new wxLogGui;
 438 }
 439
 440 wxWindow* wxApp::GetTopWindow() const
 441 {
 442     if (m_topWindow)
 443         return m_topWindow;
 444     else if (wxTopLevelWindows.Number() > 0)
 445         return (wxWindow*) wxTopLevelWindows.First()->Data();
 446     else
 447         return NULL;
 448 }
 449
 450 // Create an application context
 451 bool wxApp::OnInitGui()
 452 {
 453     XtToolkitInitialize() ;
 454     wxTheApp->m_appContext = (WXAppContext) XtCreateApplicationContext() ;
 455     Display *dpy = XtOpenDisplay((XtAppContext) wxTheApp->m_appContext,(String)NULL,NULL,
 456                             (const char*) wxTheApp->GetClassName(), NULL,
 457 # if XtSpecificationRelease < 5
 458                             0,(Cardinal*) &argc,argv) ;
 459 # else
 460                             0,&argc,argv) ;
 461 # endif
 462     if (!dpy) {
 463       cerr << "wxWindows could not open display for " << wxTheApp->GetClassName() << ": exiting.\n";
 464       exit(-1);
 465     }
 466     m_initialDisplay = (WXDisplay*) dpy;
 467
 468     wxTheApp->m_topLevelWidget = (WXWidget) XtAppCreateShell((String)NULL, (const char*) wxTheApp->GetClassName(),
 469                                      applicationShellWidgetClass,dpy,
 470                                      NULL,0) ;
 471
 472     // Add general resize proc
 473     XtActionsRec rec;
 474     rec.string = "resize";
 475     rec.proc = (XtActionProc)wxWidgetResizeProc;
 476     XtAppAddActions((XtAppContext) wxTheApp->m_appContext, &rec, 1);
 477
 478     GetMainColormap(dpy);
 479     m_maxRequestSize = XMaxRequestSize((Display*) dpy);
 480
 481     return TRUE;
 482 }
 483
 484 WXColormap wxApp::GetMainColormap(WXDisplay* display)
 485 {
 486     if (!display) /* Must be called first with non-NULL display */
 487       return m_mainColormap;
 488
 489     Colormap c =
 490       DefaultColormapOfScreen(XScreenOfDisplay((Display*) display,
 491                                              DefaultScreen((Display*) display)));
 492
 493     if (!m_mainColormap)
 494       m_mainColormap = (WXColormap) c;
 495
 496     return (WXColormap) c;
 497 }
 498
 499 void wxExit()
 500 {
 501     int retValue = 0;
 502     if (wxTheApp)
 503       retValue = wxTheApp->OnExit();
 504
 505     wxApp::CleanUp();
 506     /*
 507      * Exit in some platform-specific way. Not recommended that the app calls this:
 508      * only for emergencies.
 509      */
 510     exit(retValue);
 511 }
 512
 513 // Yield to other processes
 514 bool wxYield()
 515 {
 516     while (wxTheApp && wxTheApp->Pending())
 517       wxTheApp->Dispatch();
 518     return TRUE;
 519 }
 520