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 #include "wx/thread.h"
  32
  33 #if wxUSE_WX_RESOURCES
  34 #include "wx/resource.h"
  35 #endif
  36
  37 #include <Xm/Xm.h>
  38 #include <X11/Xlib.h>
  39 #include <X11/Xutil.h>
  40 #include <X11/Xresource.h>
  41 #include <X11/Xatom.h>
  42
  43 #include "wx/motif/private.h"
  44
  45 #include <string.h>
  46
  47 extern char *wxBuffer;
  48 extern wxList wxPendingDelete;
  49
  50 wxApp *wxTheApp = NULL;
  51
  52 wxHashTable *wxWidgetHashTable = NULL;
  53
  54 #if !USE_SHARED_LIBRARY
  55 IMPLEMENT_DYNAMIC_CLASS(wxApp, wxEvtHandler)
  56 BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
  57     EVT_IDLE(wxApp::OnIdle)
  58 END_EVENT_TABLE()
  59 #endif
  60
  61 long wxApp::sm_lastMessageTime = 0;
  62
  63 bool wxApp::Initialize()
  64 {
  65 #ifdef __WXMSW__
  66     wxBuffer = new char[1500];
  67 #else
  68     wxBuffer = new char[BUFSIZ + 512];
  69 #endif
  70
  71     wxClassInfo::InitializeClasses();
  72
  73     wxTheColourDatabase = new wxColourDatabase(wxKEY_STRING);
  74     wxTheColourDatabase->Initialize();
  75
  76     wxInitializeStockLists();
  77     wxInitializeStockObjects();
  78
  79 #if wxUSE_WX_RESOURCES
  80     wxInitializeResourceSystem();
  81 #endif
  82
  83   // For PostScript printing
  84 #if wxUSE_POSTSCRIPT
  85 /* Done using wxModule now
  86     wxInitializePrintSetupData();
  87     wxThePrintPaperDatabase = new wxPrintPaperDatabase;
  88     wxThePrintPaperDatabase->CreateDatabase();
  89 */
  90 #endif
  91
  92     wxBitmap::InitStandardHandlers();
  93
  94     wxWidgetHashTable = new wxHashTable(wxKEY_INTEGER);
  95
  96     wxModule::RegisterModules();
  97     if (!wxModule::InitializeModules()) return FALSE;
  98
  99     return TRUE;
 100 }
 101
 102 void wxApp::CleanUp()
 103 {
 104     delete wxWidgetHashTable;
 105     wxWidgetHashTable = NULL;
 106
 107     wxModule::CleanUpModules();
 108
 109 #if wxUSE_WX_RESOURCES
 110     wxCleanUpResourceSystem();
 111 #endif
 112
 113     wxDeleteStockObjects() ;
 114
 115     // Destroy all GDI lists, etc.
 116
 117     delete wxTheBrushList;
 118     wxTheBrushList = NULL;
 119
 120     delete wxThePenList;
 121     wxThePenList = NULL;
 122
 123     delete wxTheFontList;
 124     wxTheFontList = NULL;
 125
 126     delete wxTheBitmapList;
 127     wxTheBitmapList = NULL;
 128
 129     delete wxTheColourDatabase;
 130     wxTheColourDatabase = NULL;
 131
 132 #if wxUSE_POSTSCRIPT
 133 /* Done using wxModule now
 134     wxInitializePrintSetupData(FALSE);
 135     delete wxThePrintPaperDatabase;
 136     wxThePrintPaperDatabase = NULL;
 137 */
 138 #endif
 139
 140     wxBitmap::CleanUpHandlers();
 141
 142     delete[] wxBuffer;
 143     wxBuffer = NULL;
 144
 145     wxClassInfo::CleanUpClasses();
 146
 147     delete wxTheApp;
 148     wxTheApp = NULL;
 149
 150 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 151     // At this point we want to check if there are any memory
 152     // blocks that aren't part of the wxDebugContext itself,
 153     // as a special case. Then when dumping we need to ignore
 154     // wxDebugContext, too.
 155     if (wxDebugContext::CountObjectsLeft(TRUE) > 0)
 156     {
 157       wxLogDebug("There were memory leaks.\n");
 158       wxDebugContext::Dump();
 159       wxDebugContext::PrintStatistics();
 160     }
 161 #endif
 162
 163     // do it as the very last thing because everything else can log messages
 164     wxLog::DontCreateOnDemand();
 165     // do it as the very last thing because everything else can log messages
 166     delete wxLog::SetActiveTarget(NULL);
 167 }
 168
 169 int wxEntry( int argc, char *argv[] )
 170 {
 171 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 172     // This seems to be necessary since there are 'rogue'
 173     // objects present at this point (perhaps global objects?)
 174     // Setting a checkpoint will ignore them as far as the
 175     // memory checking facility is concerned.
 176     // Of course you may argue that memory allocated in globals should be
 177     // checked, but this is a reasonable compromise.
 178     wxDebugContext::SetCheckpoint();
 179 #endif
 180
 181     if (!wxApp::Initialize())
 182       return FALSE;
 183
 184     if (!wxTheApp)
 185     {
 186       if (!wxApp::GetInitializerFunction())
 187       {
 188         printf( "wxWindows error: No initializer - use IMPLEMENT_APP macro.\n" );
 189         return 0;
 190       };
 191
 192         wxTheApp = (wxApp*) (* wxApp::GetInitializerFunction()) ();
 193     };
 194
 195     if (!wxTheApp)
 196     {
 197       printf( "wxWindows error: wxTheApp == NULL\n" );
 198       return 0;
 199     };
 200
 201     wxTheApp->SetClassName(wxFileNameFromPath(argv[0]));
 202     wxTheApp->SetAppName(wxFileNameFromPath(argv[0]));
 203
 204     wxTheApp->argc = argc;
 205     wxTheApp->argv = argv;
 206
 207     // GUI-specific initialization, such as creating an app context.
 208     wxTheApp->OnInitGui();
 209
 210     // Here frames insert themselves automatically
 211     // into wxTopLevelWindows by getting created
 212     // in OnInit().
 213
 214     int retValue = 0;
 215     if (wxTheApp->OnInit())
 216     {
 217       if (wxTheApp->Initialized()) retValue = wxTheApp->OnRun();
 218     }
 219
 220     // flush the logged messages if any
 221     wxLog *pLog = wxLog::GetActiveTarget();
 222     if ( pLog != NULL && pLog->HasPendingMessages() )
 223       pLog->Flush();
 224
 225     delete wxLog::SetActiveTarget(new wxLogStderr); // So dialog boxes aren't used
 226                                    // for further messages
 227
 228     if (wxTheApp->GetTopWindow())
 229     {
 230       delete wxTheApp->GetTopWindow();
 231       wxTheApp->SetTopWindow(NULL);
 232     }
 233
 234     wxTheApp->DeletePendingObjects();
 235
 236     wxTheApp->OnExit();
 237
 238     wxApp::CleanUp();
 239
 240     return retValue;
 241 };
 242
 243 // Static member initialization
 244 wxAppInitializerFunction wxApp::m_appInitFn = (wxAppInitializerFunction) NULL;
 245
 246 wxApp::wxApp()
 247 {
 248     m_topWindow = NULL;
 249     wxTheApp = this;
 250     m_className = "";
 251     m_wantDebugOutput = TRUE ;
 252     m_appName = "";
 253     argc = 0;
 254     argv = NULL;
 255     m_printMode = wxPRINT_POSTSCRIPT;
 256     m_exitOnFrameDelete = TRUE;
 257     m_auto3D = TRUE;
 258
 259     m_mainColormap = (WXColormap) NULL;
 260     m_appContext = (WXAppContext) NULL;
 261     m_topLevelWidget = (WXWidget) NULL;
 262     m_maxRequestSize = 0;
 263     m_initialDisplay = (WXDisplay*) 0;
 264 }
 265
 266 bool wxApp::Initialized()
 267 {
 268     if (GetTopWindow())
 269       return TRUE;
 270     else
 271       return FALSE;
 272 }
 273
 274 int wxApp::MainLoop()
 275 {
 276     m_keepGoing = TRUE;
 277
 278    /*
 279     * Sit around forever waiting to process X-events. Property Change
 280     * event are handled special, because they have to refer to
 281     * the root window rather than to a widget. therefore we can't
 282     * use an Xt-eventhandler.
 283     */
 284
 285     XSelectInput(XtDisplay((Widget) wxTheApp->GetTopLevelWidget()),
 286                  XDefaultRootWindow(XtDisplay((Widget) wxTheApp->GetTopLevelWidget())),
 287                  PropertyChangeMask);
 288
 289     XEvent event;
 290
 291     // Use this flag to allow breaking the loop via wxApp::ExitMainLoop()
 292     while (m_keepGoing)
 293     {
 294       XtAppNextEvent( (XtAppContext) wxTheApp->GetAppContext(), &event);
 295
 296       ProcessXEvent((WXEvent*) & event);
 297
 298       if (XtAppPending( (XtAppContext) wxTheApp->GetAppContext() ) == 0)
 299       {
 300         if (!ProcessIdle())
 301         {
 302           wxMutexGuiLeave();
 303           usleep(20);
 304           wxMutexGuiEnter();
 305         }
 306       }
 307
 308     }
 309
 310     return 0;
 311 }
 312
 313 // Processes an X event.
 314 void wxApp::ProcessXEvent(WXEvent* _event)
 315 {
 316     XEvent* event = (XEvent*) _event;
 317
 318     if ((event->type == KeyPress) && CheckForAccelerator(_event))
 319     {
 320         // Do nothing! We intercepted and processed the event as an accelerator.
 321         return;
 322     }
 323     else if (event->type == PropertyNotify)
 324     {
 325         HandlePropertyChange(_event);
 326         return;
 327     }
 328     else if (event->type == ResizeRequest)
 329     {
 330         /* Terry Gitnick <terryg@scientech.com> - 1/21/98
 331          * If resize event, don't resize until the last resize event for this
 332          * window is recieved. Prevents flicker as windows are resized.
 333          */
 334
 335         Display *disp = XtDisplay((Widget) wxTheApp->GetTopLevelWidget());
 336         Window win = event->xany.window;
 337         XEvent report;
 338
 339         //  to avoid flicker
 340         report = * event;
 341         while( XCheckTypedWindowEvent (disp, win, ResizeRequest, &report));
 342
 343         // TODO: when implementing refresh optimization, we can use
 344         // XtAddExposureToRegion to expand the window's paint region.
 345
 346         XtDispatchEvent(event);
 347     }
 348     else
 349     {
 350         XtDispatchEvent(event);
 351     }
 352 }
 353
 354 // Returns TRUE if more time is needed.
 355 bool wxApp::ProcessIdle()
 356 {
 357     wxIdleEvent event;
 358     event.SetEventObject(this);
 359     ProcessEvent(event);
 360
 361     return event.MoreRequested();
 362 }
 363
 364 void wxApp::ExitMainLoop()
 365 {
 366     m_keepGoing = FALSE;
 367 }
 368
 369 // Is a message/event pending?
 370 bool wxApp::Pending()
 371 {
 372     XFlush(XtDisplay( (Widget) wxTheApp->GetTopLevelWidget() ));
 373
 374     // Fix by Doug from STI, to prevent a stall if non-X event
 375     // is found.
 376     return ((XtAppPending( (XtAppContext) GetAppContext() ) & XtIMXEvent) != 0) ;
 377 }
 378
 379 // Dispatch a message.
 380 void wxApp::Dispatch()
 381 {
 382 //    XtAppProcessEvent( (XtAppContext) wxTheApp->GetAppContext(), XtIMAll);
 383
 384     XEvent event;
 385     XtAppNextEvent((XtAppContext) GetAppContext(), &event);
 386     ProcessXEvent((WXEvent*) & event);
 387 }
 388
 389 // This should be redefined in a derived class for
 390 // handling property change events for XAtom IPC.
 391 void wxApp::HandlePropertyChange(WXEvent *event)
 392 {
 393     // by default do nothing special
 394     XtDispatchEvent((XEvent*) event); /* let Motif do the work */
 395 }
 396
 397 void wxApp::OnIdle(wxIdleEvent& event)
 398 {
 399     static bool inOnIdle = FALSE;
 400
 401     // Avoid recursion (via ProcessEvent default case)
 402     if (inOnIdle)
 403       return;
 404
 405     inOnIdle = TRUE;
 406
 407     // 'Garbage' collection of windows deleted with Close().
 408     DeletePendingObjects();
 409
 410     // flush the logged messages if any
 411     wxLog *pLog = wxLog::GetActiveTarget();
 412     if ( pLog != NULL && pLog->HasPendingMessages() )
 413       pLog->Flush();
 414
 415     // Send OnIdle events to all windows
 416     bool needMore = SendIdleEvents();
 417
 418     if (needMore)
 419       event.RequestMore(TRUE);
 420
 421     inOnIdle = FALSE;
 422 }
 423
 424 // Send idle event to all top-level windows
 425 bool wxApp::SendIdleEvents()
 426 {
 427     bool needMore = FALSE;
 428         wxNode* node = wxTopLevelWindows.First();
 429         while (node)
 430         {
 431                 wxWindow* win = (wxWindow*) node->Data();
 432                 if (SendIdleEvents(win))
 433             needMore = TRUE;
 434
 435                 node = node->Next();
 436         }
 437     return needMore;
 438 }
 439
 440 // Send idle event to window and all subwindows
 441 bool wxApp::SendIdleEvents(wxWindow* win)
 442 {
 443     bool needMore = FALSE;
 444
 445         wxIdleEvent event;
 446         event.SetEventObject(win);
 447         win->ProcessEvent(event);
 448
 449     if (event.MoreRequested())
 450         needMore = TRUE;
 451
 452         wxNode* node = win->GetChildren().First();
 453         while (node)
 454         {
 455                 wxWindow* win = (wxWindow*) node->Data();
 456                 if (SendIdleEvents(win))
 457             needMore = TRUE;
 458
 459                 node = node->Next();
 460         }
 461     return needMore ;
 462 }
 463
 464 void wxApp::DeletePendingObjects()
 465 {
 466     wxNode *node = wxPendingDelete.First();
 467     while (node)
 468     {
 469       wxObject *obj = (wxObject *)node->Data();
 470
 471       delete obj;
 472
 473       if (wxPendingDelete.Member(obj))
 474         delete node;
 475
 476       // Deleting one object may have deleted other pending
 477       // objects, so start from beginning of list again.
 478       node = wxPendingDelete.First();
 479     }
 480 }
 481
 482 wxLog* wxApp::CreateLogTarget()
 483 {
 484     return new wxLogGui;
 485 }
 486
 487 wxWindow* wxApp::GetTopWindow() const
 488 {
 489     if (m_topWindow)
 490         return m_topWindow;
 491     else if (wxTopLevelWindows.Number() > 0)
 492         return (wxWindow*) wxTopLevelWindows.First()->Data();
 493     else
 494         return NULL;
 495 }
 496
 497 // Create an application context
 498 bool wxApp::OnInitGui()
 499 {
 500     XtToolkitInitialize() ;
 501     wxTheApp->m_appContext = (WXAppContext) XtCreateApplicationContext() ;
 502     Display *dpy = XtOpenDisplay((XtAppContext) wxTheApp->m_appContext,(String)NULL,NULL,
 503                             (const char*) wxTheApp->GetClassName(), NULL,
 504 # if XtSpecificationRelease < 5
 505                             0,(Cardinal*) &argc,argv) ;
 506 # else
 507                             0,&argc,argv) ;
 508 # endif
 509     if (!dpy) {
 510       cerr << "wxWindows could not open display for " << wxTheApp->GetClassName() << ": exiting.\n";
 511       exit(-1);
 512     }
 513     m_initialDisplay = (WXDisplay*) dpy;
 514
 515     wxTheApp->m_topLevelWidget = (WXWidget) XtAppCreateShell((String)NULL, (const char*) wxTheApp->GetClassName(),
 516                                      applicationShellWidgetClass,dpy,
 517                                      NULL,0) ;
 518
 519     // Add general resize proc
 520     XtActionsRec rec;
 521     rec.string = "resize";
 522     rec.proc = (XtActionProc)wxWidgetResizeProc;
 523     XtAppAddActions((XtAppContext) wxTheApp->m_appContext, &rec, 1);
 524
 525     GetMainColormap(dpy);
 526     m_maxRequestSize = XMaxRequestSize((Display*) dpy);
 527
 528     return TRUE;
 529 }
 530
 531 WXColormap wxApp::GetMainColormap(WXDisplay* display)
 532 {
 533     if (!display) /* Must be called first with non-NULL display */
 534       return m_mainColormap;
 535
 536     Colormap c =
 537       DefaultColormapOfScreen(XScreenOfDisplay((Display*) display,
 538                                              DefaultScreen((Display*) display)));
 539
 540     if (!m_mainColormap)
 541       m_mainColormap = (WXColormap) c;
 542
 543     return (WXColormap) c;
 544 }
 545
 546 // Returns TRUE if an accelerator has been processed
 547 bool wxApp::CheckForAccelerator(WXEvent* event)
 548 {
 549     XEvent* xEvent = (XEvent*) event;
 550     if (xEvent->xany.type == KeyPress)
 551     {
 552         // Find a wxWindow for this window
 553         // TODO: should get display for the window, not the current display
 554         Widget widget = XtWindowToWidget((Display*) wxGetDisplay(), xEvent->xany.window);
 555         wxWindow* win = NULL;
 556
 557         // Find the first wxWindow that corresponds to this event window
 558         while (widget && !(win = wxGetWindowFromTable(widget)))
 559             widget = XtParent(widget);
 560
 561         if (!widget || !win)
 562             return FALSE;
 563
 564         wxKeyEvent keyEvent(wxEVT_CHAR);
 565         wxTranslateKeyEvent(keyEvent, win, (Widget) 0, xEvent);
 566
 567         // Now we have a wxKeyEvent and we have a wxWindow.
 568         // Go up the hierarchy until we find a matching accelerator,
 569         // or we get to the top.
 570         while (win)
 571         {
 572             if (win->ProcessAccelerator(keyEvent))
 573                 return TRUE;
 574             win = win->GetParent();
 575         }
 576         return FALSE;
 577     }
 578     return FALSE;
 579 }
 580
 581 void wxExit()
 582 {
 583     int retValue = 0;
 584     if (wxTheApp)
 585       retValue = wxTheApp->OnExit();
 586
 587     wxApp::CleanUp();
 588     /*
 589      * Exit in some platform-specific way. Not recommended that the app calls this:
 590      * only for emergencies.
 591      */
 592     exit(retValue);
 593 }
 594
 595 // Yield to other processes
 596 bool wxYield()
 597 {
 598     while (wxTheApp && wxTheApp->Pending())
 599       wxTheApp->Dispatch();
 600     return TRUE;
 601 }
 602