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 #include "wx/thread.h"
  33
  34 #if wxUSE_WX_RESOURCES
  35     #include "wx/resource.h"
  36 #endif
  37
  38 #include <Xm/Xm.h>
  39 #include <X11/Xlib.h>
  40 #include <X11/Xutil.h>
  41 #include <X11/Xresource.h>
  42 #include <X11/Xatom.h>
  43
  44 #include "wx/motif/private.h"
  45
  46 #include <string.h>
  47
  48 extern char *wxBuffer;
  49 extern wxList wxPendingDelete;
  50
  51 wxApp *wxTheApp = NULL;
  52
  53 wxHashTable *wxWidgetHashTable = NULL;
  54
  55 #if !USE_SHARED_LIBRARY
  56 IMPLEMENT_DYNAMIC_CLASS(wxApp, wxEvtHandler)
  57
  58 BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
  59     EVT_IDLE(wxApp::OnIdle)
  60 END_EVENT_TABLE()
  61 #endif
  62
  63 long wxApp::sm_lastMessageTime = 0;
  64
  65 bool wxApp::Initialize()
  66 {
  67     wxBuffer = new char[BUFSIZ + 512];
  68
  69     wxClassInfo::InitializeClasses();
  70
  71     wxTheColourDatabase = new wxColourDatabase(wxKEY_STRING);
  72     wxTheColourDatabase->Initialize();
  73
  74     wxInitializeStockLists();
  75     wxInitializeStockObjects();
  76
  77 #if wxUSE_WX_RESOURCES
  78     wxInitializeResourceSystem();
  79 #endif
  80
  81     // For PostScript printing
  82 #if wxUSE_POSTSCRIPT
  83     /* Done using wxModule now
  84     wxInitializePrintSetupData();
  85     wxThePrintPaperDatabase = new wxPrintPaperDatabase;
  86     wxThePrintPaperDatabase->CreateDatabase();
  87     */
  88 #endif
  89
  90     wxBitmap::InitStandardHandlers();
  91
  92     wxWidgetHashTable = new wxHashTable(wxKEY_INTEGER);
  93
  94     wxModule::RegisterModules();
  95     if (!wxModule::InitializeModules()) return FALSE;
  96
  97     return TRUE;
  98 }
  99
 100 void wxApp::CleanUp()
 101 {
 102     delete wxWidgetHashTable;
 103     wxWidgetHashTable = NULL;
 104
 105     wxModule::CleanUpModules();
 106
 107 #if wxUSE_WX_RESOURCES
 108     wxCleanUpResourceSystem();
 109 #endif
 110
 111     wxDeleteStockObjects() ;
 112
 113     // Destroy all GDI lists, etc.
 114
 115     delete wxTheBrushList;
 116     wxTheBrushList = NULL;
 117
 118     delete wxThePenList;
 119     wxThePenList = NULL;
 120
 121     delete wxTheFontList;
 122     wxTheFontList = NULL;
 123
 124     delete wxTheBitmapList;
 125     wxTheBitmapList = NULL;
 126
 127     delete wxTheColourDatabase;
 128     wxTheColourDatabase = NULL;
 129
 130 #if wxUSE_POSTSCRIPT
 131     /* Done using wxModule now
 132     wxInitializePrintSetupData(FALSE);
 133     delete wxThePrintPaperDatabase;
 134     wxThePrintPaperDatabase = NULL;
 135     */
 136 #endif
 137
 138     wxBitmap::CleanUpHandlers();
 139
 140     delete[] wxBuffer;
 141     wxBuffer = NULL;
 142
 143     wxClassInfo::CleanUpClasses();
 144
 145     delete wxTheApp;
 146     wxTheApp = NULL;
 147
 148 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 149     // At this point we want to check if there are any memory
 150     // blocks that aren't part of the wxDebugContext itself,
 151     // as a special case. Then when dumping we need to ignore
 152     // wxDebugContext, too.
 153     if (wxDebugContext::CountObjectsLeft(TRUE) > 0)
 154     {
 155         wxLogDebug("There were memory leaks.\n");
 156         wxDebugContext::Dump();
 157         wxDebugContext::PrintStatistics();
 158     }
 159 #endif
 160
 161     // do it as the very last thing because everything else can log messages
 162     wxLog::DontCreateOnDemand();
 163     // do it as the very last thing because everything else can log messages
 164     delete wxLog::SetActiveTarget(NULL);
 165 }
 166
 167 int wxEntry( int argc, char *argv[] )
 168 {
 169 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 170     // This seems to be necessary since there are 'rogue'
 171     // objects present at this point (perhaps global objects?)
 172     // Setting a checkpoint will ignore them as far as the
 173     // memory checking facility is concerned.
 174     // Of course you may argue that memory allocated in globals should be
 175     // checked, but this is a reasonable compromise.
 176     wxDebugContext::SetCheckpoint();
 177 #endif
 178
 179     if (!wxApp::Initialize())
 180         return FALSE;
 181
 182     if (!wxTheApp)
 183     {
 184         if (!wxApp::GetInitializerFunction())
 185         {
 186             printf( "wxWindows error: No initializer - use IMPLEMENT_APP macro.\n" );
 187             return 0;
 188         };
 189
 190         wxTheApp = (wxApp*) (* wxApp::GetInitializerFunction()) ();
 191     };
 192
 193     if (!wxTheApp)
 194     {
 195         printf( "wxWindows error: wxTheApp == NULL\n" );
 196         return 0;
 197     };
 198
 199     wxTheApp->SetClassName(wxFileNameFromPath(argv[0]));
 200     wxTheApp->SetAppName(wxFileNameFromPath(argv[0]));
 201
 202     wxTheApp->argc = argc;
 203     wxTheApp->argv = argv;
 204
 205     // GUI-specific initialization, such as creating an app context.
 206     wxTheApp->OnInitGui();
 207
 208     // Here frames insert themselves automatically
 209     // into wxTopLevelWindows by getting created
 210     // in OnInit().
 211
 212     int retValue = 0;
 213     if (wxTheApp->OnInit())
 214     {
 215         if (wxTheApp->Initialized()) retValue = wxTheApp->OnRun();
 216     }
 217
 218     // flush the logged messages if any
 219     wxLog *pLog = wxLog::GetActiveTarget();
 220     if ( pLog != NULL && pLog->HasPendingMessages() )
 221         pLog->Flush();
 222
 223     delete wxLog::SetActiveTarget(new wxLogStderr); // So dialog boxes aren't used
 224     // for further messages
 225
 226     if (wxTheApp->GetTopWindow())
 227     {
 228         delete wxTheApp->GetTopWindow();
 229         wxTheApp->SetTopWindow(NULL);
 230     }
 231
 232     wxTheApp->DeletePendingObjects();
 233
 234     wxTheApp->OnExit();
 235
 236     wxApp::CleanUp();
 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
 296         if (XtAppPending( (XtAppContext) wxTheApp->GetAppContext() ) == 0)
 297         {
 298             if (!ProcessIdle())
 299             {
 300                 // leave the main loop to give other threads a chance to
 301                 // perform their GUI work
 302                 wxMutexGuiLeave();
 303                 wxUsleep(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, 0,
 504 # if XtSpecificationRelease < 5
 505         (Cardinal*) &argc,
 506 # else
 507         &argc,
 508 # endif
 509         argv);
 510
 511     if (!dpy) {
 512         wxLogError(_("wxWindows could not open display for '%s': exiting."),
 513                    wxTheApp->GetClassName());
 514         exit(-1);
 515     }
 516     m_initialDisplay = (WXDisplay*) dpy;
 517
 518     wxTheApp->m_topLevelWidget = (WXWidget) XtAppCreateShell((String)NULL, (const char*) wxTheApp->GetClassName(),
 519         applicationShellWidgetClass,dpy,
 520         NULL,0) ;
 521
 522     // Add general resize proc
 523     XtActionsRec rec;
 524     rec.string = "resize";
 525     rec.proc = (XtActionProc)wxWidgetResizeProc;
 526     XtAppAddActions((XtAppContext) wxTheApp->m_appContext, &rec, 1);
 527
 528     GetMainColormap(dpy);
 529     m_maxRequestSize = XMaxRequestSize((Display*) dpy);
 530
 531     return TRUE;
 532 }
 533
 534 WXColormap wxApp::GetMainColormap(WXDisplay* display)
 535 {
 536     if (!display) /* Must be called first with non-NULL display */
 537         return m_mainColormap;
 538
 539     int defaultScreen = DefaultScreen((Display*) display);
 540     Screen* screen = XScreenOfDisplay((Display*) display, defaultScreen);
 541
 542     Colormap c = DefaultColormapOfScreen(screen);
 543
 544     if (!m_mainColormap)
 545         m_mainColormap = (WXColormap) c;
 546
 547     return (WXColormap) c;
 548 }
 549
 550 // Returns TRUE if an accelerator has been processed
 551 bool wxApp::CheckForAccelerator(WXEvent* event)
 552 {
 553     XEvent* xEvent = (XEvent*) event;
 554     if (xEvent->xany.type == KeyPress)
 555     {
 556         // Find a wxWindow for this window
 557         // TODO: should get display for the window, not the current display
 558         Widget widget = XtWindowToWidget((Display*) wxGetDisplay(), xEvent->xany.window);
 559         wxWindow* win = NULL;
 560
 561         // Find the first wxWindow that corresponds to this event window
 562         while (widget && !(win = wxGetWindowFromTable(widget)))
 563             widget = XtParent(widget);
 564
 565         if (!widget || !win)
 566             return FALSE;
 567
 568         wxKeyEvent keyEvent(wxEVT_CHAR);
 569         wxTranslateKeyEvent(keyEvent, win, (Widget) 0, xEvent);
 570
 571         // Now we have a wxKeyEvent and we have a wxWindow.
 572         // Go up the hierarchy until we find a matching accelerator,
 573         // or we get to the top.
 574         while (win)
 575         {
 576             if (win->ProcessAccelerator(keyEvent))
 577                 return TRUE;
 578             win = win->GetParent();
 579         }
 580         return FALSE;
 581     }
 582     return FALSE;
 583 }
 584
 585 void wxExit()
 586 {
 587     int retValue = 0;
 588     if (wxTheApp)
 589         retValue = wxTheApp->OnExit();
 590
 591     wxApp::CleanUp();
 592     /*
 593     * Exit in some platform-specific way. Not recommended that the app calls this:
 594     * only for emergencies.
 595     */
 596     exit(retValue);
 597 }
 598
 599 // Yield to other processes
 600 bool wxYield()
 601 {
 602     while (wxTheApp && wxTheApp->Pending())
 603         wxTheApp->Dispatch();
 604
 605     // VZ: is it the same as this (taken from old wxExecute)?
 606 #if 0
 607     XtAppProcessEvent((XtAppContext) wxTheApp->GetAppContext(), XtIMAll);
 608 #endif
 609
 610     return TRUE;
 611 }
 612