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 (defined(__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     // flush the logged messages if any
 201     wxLog *pLog = wxLog::GetActiveTarget();
 202     if ( pLog != NULL && pLog->HasPendingMessages() )
 203       pLog->Flush();
 204
 205     delete wxLog::SetActiveTarget(new wxLogStderr); // So dialog boxes aren't used
 206                                    // for further messages
 207
 208     if (wxTheApp->GetTopWindow())
 209     {
 210       delete wxTheApp->GetTopWindow();
 211       wxTheApp->SetTopWindow(NULL);
 212     }
 213
 214     wxTheApp->DeletePendingObjects();
 215
 216     wxTheApp->OnExit();
 217
 218
 219     wxApp::CleanUp();
 220
 221     delete wxTheApp;
 222     wxTheApp = NULL;
 223
 224 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 225     // At this point we want to check if there are any memory
 226     // blocks that aren't part of the wxDebugContext itself,
 227     // as a special case. Then when dumping we need to ignore
 228     // wxDebugContext, too.
 229     if (wxDebugContext::CountObjectsLeft() > 0)
 230     {
 231       wxTrace("There were memory leaks.\n");
 232       wxDebugContext::Dump();
 233       wxDebugContext::PrintStatistics();
 234     }
 235     wxDebugContext::SetStream(NULL, NULL);
 236 #endif
 237
 238     return retValue;
 239 };
 240
 241 // Static member initialization
 242 wxAppInitializerFunction wxApp::m_appInitFn = (wxAppInitializerFunction) NULL;
 243
 244 wxApp::wxApp()
 245 {
 246     m_topWindow = NULL;
 247     wxTheApp = this;
 248     m_className = "";
 249     m_wantDebugOutput = TRUE ;
 250     m_appName = "";
 251     argc = 0;
 252     argv = NULL;
 253     m_printMode = wxPRINT_POSTSCRIPT;
 254     m_exitOnFrameDelete = TRUE;
 255     m_auto3D = TRUE;
 256
 257     m_mainColormap = (WXColormap) NULL;
 258     m_appContext = (WXAppContext) NULL;
 259     m_topLevelWidget = (WXWidget) NULL;
 260     m_maxRequestSize = 0;
 261     m_initialDisplay = (WXDisplay*) 0;
 262 }
 263
 264 bool wxApp::Initialized()
 265 {
 266     if (GetTopWindow())
 267       return TRUE;
 268     else
 269       return FALSE;
 270 }
 271
 272 int wxApp::MainLoop()
 273 {
 274     m_keepGoing = TRUE;
 275
 276    /*
 277     * Sit around forever waiting to process X-events. Property Change
 278     * event are handled special, because they have to refer to
 279     * the root window rather than to a widget. therefore we can't
 280     * use an Xt-eventhandler.
 281     */
 282
 283     XSelectInput(XtDisplay((Widget) wxTheApp->GetTopLevelWidget()),
 284                  XDefaultRootWindow(XtDisplay((Widget) wxTheApp->GetTopLevelWidget())),
 285                  PropertyChangeMask);
 286
 287     XEvent event;
 288
 289     // Use this flag to allow breaking the loop via wxApp::ExitMainLoop()
 290     while (m_keepGoing)
 291     {
 292       XtAppNextEvent( (XtAppContext) wxTheApp->GetAppContext(), &event);
 293
 294       ProcessXEvent((WXEvent*) & event);
 295       ProcessIdle();
 296     }
 297
 298     return 0;
 299 }
 300
 301 // Processes an X event.
 302 void wxApp::ProcessXEvent(WXEvent* _event)
 303 {
 304     XEvent* event = (XEvent*) _event;
 305
 306     if ((event->type == KeyPress) && CheckForAccelerator(_event))
 307     {
 308         // Do nothing! We intercepted and processed the event as an accelerator.
 309         return;
 310     }
 311     else if (event->type == PropertyNotify)
 312     {
 313         HandlePropertyChange(_event);
 314         return;
 315     }
 316     else if (event->type == ResizeRequest)
 317     {
 318         /* Terry Gitnick <terryg@scientech.com> - 1/21/98
 319          * If resize event, don't resize until the last resize event for this
 320          * window is recieved. Prevents flicker as windows are resized.
 321          */
 322
 323         Display *disp = XtDisplay((Widget) wxTheApp->GetTopLevelWidget());
 324         Window win = event->xany.window;
 325         XEvent report;
 326
 327         //  to avoid flicker
 328         report = * event;
 329         while( XCheckTypedWindowEvent (disp, win, ResizeRequest, &report));
 330
 331         // TODO: when implementing refresh optimization, we can use
 332         // XtAddExposureToRegion to expand the window's paint region.
 333
 334         XtDispatchEvent(event);
 335     }
 336     else
 337     {
 338         XtDispatchEvent(event);
 339     }
 340 }
 341
 342 // Returns TRUE if more time is needed.
 343 bool wxApp::ProcessIdle()
 344 {
 345     wxIdleEvent event;
 346     event.SetEventObject(this);
 347     ProcessEvent(event);
 348
 349     return event.MoreRequested();
 350 }
 351
 352 void wxApp::ExitMainLoop()
 353 {
 354     m_keepGoing = FALSE;
 355 }
 356
 357 // Is a message/event pending?
 358 bool wxApp::Pending()
 359 {
 360     XFlush(XtDisplay( (Widget) wxTheApp->GetTopLevelWidget() ));
 361
 362     // Fix by Doug from STI, to prevent a stall if non-X event
 363     // is found.
 364     return ((XtAppPending( (XtAppContext) GetAppContext() ) & XtIMXEvent) != 0) ;
 365 }
 366
 367 // Dispatch a message.
 368 void wxApp::Dispatch()
 369 {
 370 //    XtAppProcessEvent( (XtAppContext) wxTheApp->GetAppContext(), XtIMAll);
 371
 372     XEvent event;
 373     XtAppNextEvent((XtAppContext) GetAppContext(), &event);
 374     ProcessXEvent((WXEvent*) & event);
 375 }
 376
 377 // This should be redefined in a derived class for
 378 // handling property change events for XAtom IPC.
 379 void wxApp::HandlePropertyChange(WXEvent *event)
 380 {
 381     // by default do nothing special
 382     XtDispatchEvent((XEvent*) event); /* let Motif do the work */
 383 }
 384
 385 void wxApp::OnIdle(wxIdleEvent& event)
 386 {
 387     static bool inOnIdle = FALSE;
 388
 389     // Avoid recursion (via ProcessEvent default case)
 390     if (inOnIdle)
 391       return;
 392
 393     inOnIdle = TRUE;
 394
 395     // 'Garbage' collection of windows deleted with Close().
 396     DeletePendingObjects();
 397
 398     // flush the logged messages if any
 399     wxLog *pLog = wxLog::GetActiveTarget();
 400     if ( pLog != NULL && pLog->HasPendingMessages() )
 401       pLog->Flush();
 402
 403     // Send OnIdle events to all windows
 404     bool needMore = SendIdleEvents();
 405
 406     if (needMore)
 407       event.RequestMore(TRUE);
 408
 409     inOnIdle = FALSE;
 410 }
 411
 412 // Send idle event to all top-level windows
 413 bool wxApp::SendIdleEvents()
 414 {
 415     bool needMore = FALSE;
 416         wxNode* node = wxTopLevelWindows.First();
 417         while (node)
 418         {
 419                 wxWindow* win = (wxWindow*) node->Data();
 420                 if (SendIdleEvents(win))
 421             needMore = TRUE;
 422
 423                 node = node->Next();
 424         }
 425     return needMore;
 426 }
 427
 428 // Send idle event to window and all subwindows
 429 bool wxApp::SendIdleEvents(wxWindow* win)
 430 {
 431     bool needMore = FALSE;
 432
 433         wxIdleEvent event;
 434         event.SetEventObject(win);
 435         win->ProcessEvent(event);
 436
 437     if (event.MoreRequested())
 438         needMore = TRUE;
 439
 440         wxNode* node = win->GetChildren()->First();
 441         while (node)
 442         {
 443                 wxWindow* win = (wxWindow*) node->Data();
 444                 if (SendIdleEvents(win))
 445             needMore = TRUE;
 446
 447                 node = node->Next();
 448         }
 449     return needMore ;
 450 }
 451
 452 void wxApp::DeletePendingObjects()
 453 {
 454     wxNode *node = wxPendingDelete.First();
 455     while (node)
 456     {
 457       wxObject *obj = (wxObject *)node->Data();
 458
 459       delete obj;
 460
 461       if (wxPendingDelete.Member(obj))
 462         delete node;
 463
 464       // Deleting one object may have deleted other pending
 465       // objects, so start from beginning of list again.
 466       node = wxPendingDelete.First();
 467     }
 468 }
 469
 470 wxLog* wxApp::CreateLogTarget()
 471 {
 472     return new wxLogGui;
 473 }
 474
 475 wxWindow* wxApp::GetTopWindow() const
 476 {
 477     if (m_topWindow)
 478         return m_topWindow;
 479     else if (wxTopLevelWindows.Number() > 0)
 480         return (wxWindow*) wxTopLevelWindows.First()->Data();
 481     else
 482         return NULL;
 483 }
 484
 485 // Create an application context
 486 bool wxApp::OnInitGui()
 487 {
 488     XtToolkitInitialize() ;
 489     wxTheApp->m_appContext = (WXAppContext) XtCreateApplicationContext() ;
 490     Display *dpy = XtOpenDisplay((XtAppContext) wxTheApp->m_appContext,(String)NULL,NULL,
 491                             (const char*) wxTheApp->GetClassName(), NULL,
 492 # if XtSpecificationRelease < 5
 493                             0,(Cardinal*) &argc,argv) ;
 494 # else
 495                             0,&argc,argv) ;
 496 # endif
 497     if (!dpy) {
 498       cerr << "wxWindows could not open display for " << wxTheApp->GetClassName() << ": exiting.\n";
 499       exit(-1);
 500     }
 501     m_initialDisplay = (WXDisplay*) dpy;
 502
 503     wxTheApp->m_topLevelWidget = (WXWidget) XtAppCreateShell((String)NULL, (const char*) wxTheApp->GetClassName(),
 504                                      applicationShellWidgetClass,dpy,
 505                                      NULL,0) ;
 506
 507     // Add general resize proc
 508     XtActionsRec rec;
 509     rec.string = "resize";
 510     rec.proc = (XtActionProc)wxWidgetResizeProc;
 511     XtAppAddActions((XtAppContext) wxTheApp->m_appContext, &rec, 1);
 512
 513     GetMainColormap(dpy);
 514     m_maxRequestSize = XMaxRequestSize((Display*) dpy);
 515
 516     return TRUE;
 517 }
 518
 519 WXColormap wxApp::GetMainColormap(WXDisplay* display)
 520 {
 521     if (!display) /* Must be called first with non-NULL display */
 522       return m_mainColormap;
 523
 524     Colormap c =
 525       DefaultColormapOfScreen(XScreenOfDisplay((Display*) display,
 526                                              DefaultScreen((Display*) display)));
 527
 528     if (!m_mainColormap)
 529       m_mainColormap = (WXColormap) c;
 530
 531     return (WXColormap) c;
 532 }
 533
 534 // Returns TRUE if an accelerator has been processed
 535 bool wxApp::CheckForAccelerator(WXEvent* event)
 536 {
 537     XEvent* xEvent = (XEvent*) event;
 538     if (xEvent->xany.type == KeyPress)
 539     {
 540         // Find a wxWindow for this window
 541         // TODO: should get display for the window, not the current display
 542         Widget widget = XtWindowToWidget((Display*) wxGetDisplay(), xEvent->xany.window);
 543         wxWindow* win = NULL;
 544
 545         // Find the first wxWindow that corresponds to this event window
 546         while (widget && !(win = wxGetWindowFromTable(widget)))
 547             widget = XtParent(widget);
 548
 549         if (!widget || !win)
 550             return FALSE;
 551
 552         wxKeyEvent keyEvent(wxEVT_CHAR);
 553         wxTranslateKeyEvent(keyEvent, win, (Widget) 0, xEvent);
 554
 555         // Now we have a wxKeyEvent and we have a wxWindow.
 556         // Go up the hierarchy until we find a matching accelerator,
 557         // or we get to the top.
 558         while (win)
 559         {
 560             if (win->ProcessAccelerator(keyEvent))
 561                 return TRUE;
 562             win = win->GetParent();
 563         }
 564         return FALSE;
 565     }
 566     return FALSE;
 567 }
 568
 569 void wxExit()
 570 {
 571     int retValue = 0;
 572     if (wxTheApp)
 573       retValue = wxTheApp->OnExit();
 574
 575     wxApp::CleanUp();
 576     /*
 577      * Exit in some platform-specific way. Not recommended that the app calls this:
 578      * only for emergencies.
 579      */
 580     exit(retValue);
 581 }
 582
 583 // Yield to other processes
 584 bool wxYield()
 585 {
 586     while (wxTheApp && wxTheApp->Pending())
 587       wxTheApp->Dispatch();
 588     return TRUE;
 589 }
 590