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_THREADS
  33 #include "wx/thread.h"
  34 #endif
  35
  36 #if wxUSE_WX_RESOURCES
  37     #include "wx/resource.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
  60 BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
  61     EVT_IDLE(wxApp::OnIdle)
  62 END_EVENT_TABLE()
  63 #endif
  64
  65 long wxApp::sm_lastMessageTime = 0;
  66
  67 bool wxApp::Initialize()
  68 {
  69     wxBuffer = new char[BUFSIZ + 512];
  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 #if wxUSE_THREADS
 303                 // leave the main loop to give other threads a chance to
 304                 // perform their GUI work
 305                 wxMutexGuiLeave();
 306                 wxUsleep(20);
 307                 wxMutexGuiEnter();
 308 #endif
 309             }
 310         }
 311
 312     }
 313
 314     return 0;
 315 }
 316
 317 // Processes an X event.
 318 void wxApp::ProcessXEvent(WXEvent* _event)
 319 {
 320     XEvent* event = (XEvent*) _event;
 321
 322     if ((event->type == KeyPress) && CheckForAccelerator(_event))
 323     {
 324         // Do nothing! We intercepted and processed the event as an accelerator.
 325         return;
 326     }
 327     else if (event->type == PropertyNotify)
 328     {
 329         HandlePropertyChange(_event);
 330         return;
 331     }
 332     else if (event->type == ResizeRequest)
 333     {
 334     /* Terry Gitnick <terryg@scientech.com> - 1/21/98
 335     * If resize event, don't resize until the last resize event for this
 336     * window is recieved. Prevents flicker as windows are resized.
 337         */
 338
 339         Display *disp = XtDisplay((Widget) wxTheApp->GetTopLevelWidget());
 340         Window win = event->xany.window;
 341         XEvent report;
 342
 343         //  to avoid flicker
 344         report = * event;
 345         while( XCheckTypedWindowEvent (disp, win, ResizeRequest, &report));
 346
 347         // TODO: when implementing refresh optimization, we can use
 348         // XtAddExposureToRegion to expand the window's paint region.
 349
 350         XtDispatchEvent(event);
 351     }
 352     else
 353     {
 354         XtDispatchEvent(event);
 355     }
 356 }
 357
 358 // Returns TRUE if more time is needed.
 359 bool wxApp::ProcessIdle()
 360 {
 361     wxIdleEvent event;
 362     event.SetEventObject(this);
 363     ProcessEvent(event);
 364
 365     return event.MoreRequested();
 366 }
 367
 368 void wxApp::ExitMainLoop()
 369 {
 370     m_keepGoing = FALSE;
 371 }
 372
 373 // Is a message/event pending?
 374 bool wxApp::Pending()
 375 {
 376     XFlush(XtDisplay( (Widget) wxTheApp->GetTopLevelWidget() ));
 377
 378     // Fix by Doug from STI, to prevent a stall if non-X event
 379     // is found.
 380     return ((XtAppPending( (XtAppContext) GetAppContext() ) & XtIMXEvent) != 0) ;
 381 }
 382
 383 // Dispatch a message.
 384 void wxApp::Dispatch()
 385 {
 386     //    XtAppProcessEvent( (XtAppContext) wxTheApp->GetAppContext(), XtIMAll);
 387
 388     XEvent event;
 389     XtAppNextEvent((XtAppContext) GetAppContext(), &event);
 390     ProcessXEvent((WXEvent*) & event);
 391 }
 392
 393 // This should be redefined in a derived class for
 394 // handling property change events for XAtom IPC.
 395 void wxApp::HandlePropertyChange(WXEvent *event)
 396 {
 397     // by default do nothing special
 398     XtDispatchEvent((XEvent*) event); /* let Motif do the work */
 399 }
 400
 401 void wxApp::OnIdle(wxIdleEvent& event)
 402 {
 403     static bool inOnIdle = FALSE;
 404
 405     // Avoid recursion (via ProcessEvent default case)
 406     if (inOnIdle)
 407         return;
 408
 409     inOnIdle = TRUE;
 410
 411     // 'Garbage' collection of windows deleted with Close().
 412     DeletePendingObjects();
 413
 414     // flush the logged messages if any
 415     wxLog *pLog = wxLog::GetActiveTarget();
 416     if ( pLog != NULL && pLog->HasPendingMessages() )
 417         pLog->Flush();
 418
 419     // Send OnIdle events to all windows
 420     bool needMore = SendIdleEvents();
 421
 422     if (needMore)
 423         event.RequestMore(TRUE);
 424
 425     inOnIdle = FALSE;
 426 }
 427
 428 // Send idle event to all top-level windows
 429 bool wxApp::SendIdleEvents()
 430 {
 431     bool needMore = FALSE;
 432     wxNode* node = wxTopLevelWindows.First();
 433     while (node)
 434     {
 435         wxWindow* win = (wxWindow*) node->Data();
 436         if (SendIdleEvents(win))
 437             needMore = TRUE;
 438
 439         node = node->Next();
 440     }
 441     return needMore;
 442 }
 443
 444 // Send idle event to window and all subwindows
 445 bool wxApp::SendIdleEvents(wxWindow* win)
 446 {
 447     bool needMore = FALSE;
 448
 449     wxIdleEvent event;
 450     event.SetEventObject(win);
 451     win->ProcessEvent(event);
 452
 453     if (event.MoreRequested())
 454         needMore = TRUE;
 455
 456     wxNode* node = win->GetChildren().First();
 457     while (node)
 458     {
 459         wxWindow* win = (wxWindow*) node->Data();
 460         if (SendIdleEvents(win))
 461             needMore = TRUE;
 462
 463         node = node->Next();
 464     }
 465     return needMore ;
 466 }
 467
 468 void wxApp::DeletePendingObjects()
 469 {
 470     wxNode *node = wxPendingDelete.First();
 471     while (node)
 472     {
 473         wxObject *obj = (wxObject *)node->Data();
 474
 475         delete obj;
 476
 477         if (wxPendingDelete.Member(obj))
 478             delete node;
 479
 480         // Deleting one object may have deleted other pending
 481         // objects, so start from beginning of list again.
 482         node = wxPendingDelete.First();
 483     }
 484 }
 485
 486 wxLog* wxApp::CreateLogTarget()
 487 {
 488     return new wxLogGui;
 489 }
 490
 491 wxWindow* wxApp::GetTopWindow() const
 492 {
 493     if (m_topWindow)
 494         return m_topWindow;
 495     else if (wxTopLevelWindows.Number() > 0)
 496         return (wxWindow*) wxTopLevelWindows.First()->Data();
 497     else
 498         return NULL;
 499 }
 500
 501 // Create an application context
 502 bool wxApp::OnInitGui()
 503 {
 504     XtToolkitInitialize() ;
 505     wxTheApp->m_appContext = (WXAppContext) XtCreateApplicationContext() ;
 506     Display *dpy = XtOpenDisplay((XtAppContext) wxTheApp->m_appContext,(String)NULL,NULL,
 507         (const char*) wxTheApp->GetClassName(), NULL, 0,
 508 # if XtSpecificationRelease < 5
 509         (Cardinal*) &argc,
 510 # else
 511         &argc,
 512 # endif
 513         argv);
 514
 515     if (!dpy) {
 516         wxString className(wxTheApp->GetClassName());
 517         wxLogError(_("wxWindows could not open display for '%s': exiting."),
 518                    (const char*) className);
 519         exit(-1);
 520     }
 521     m_initialDisplay = (WXDisplay*) dpy;
 522
 523     wxTheApp->m_topLevelWidget = (WXWidget) XtAppCreateShell((String)NULL, (const char*) wxTheApp->GetClassName(),
 524         applicationShellWidgetClass,dpy,
 525         NULL,0) ;
 526
 527     // Add general resize proc
 528     XtActionsRec rec;
 529     rec.string = "resize";
 530     rec.proc = (XtActionProc)wxWidgetResizeProc;
 531     XtAppAddActions((XtAppContext) wxTheApp->m_appContext, &rec, 1);
 532
 533     GetMainColormap(dpy);
 534     m_maxRequestSize = XMaxRequestSize((Display*) dpy);
 535
 536     return TRUE;
 537 }
 538
 539 WXColormap wxApp::GetMainColormap(WXDisplay* display)
 540 {
 541     if (!display) /* Must be called first with non-NULL display */
 542         return m_mainColormap;
 543
 544     int defaultScreen = DefaultScreen((Display*) display);
 545     Screen* screen = XScreenOfDisplay((Display*) display, defaultScreen);
 546
 547     Colormap c = DefaultColormapOfScreen(screen);
 548
 549     if (!m_mainColormap)
 550         m_mainColormap = (WXColormap) c;
 551
 552     return (WXColormap) c;
 553 }
 554
 555 // Returns TRUE if an accelerator has been processed
 556 bool wxApp::CheckForAccelerator(WXEvent* event)
 557 {
 558     XEvent* xEvent = (XEvent*) event;
 559     if (xEvent->xany.type == KeyPress)
 560     {
 561         // Find a wxWindow for this window
 562         // TODO: should get display for the window, not the current display
 563         Widget widget = XtWindowToWidget((Display*) wxGetDisplay(), xEvent->xany.window);
 564         wxWindow* win = NULL;
 565
 566         // Find the first wxWindow that corresponds to this event window
 567         while (widget && !(win = wxGetWindowFromTable(widget)))
 568             widget = XtParent(widget);
 569
 570         if (!widget || !win)
 571             return FALSE;
 572
 573         wxKeyEvent keyEvent(wxEVT_CHAR);
 574         wxTranslateKeyEvent(keyEvent, win, (Widget) 0, xEvent);
 575
 576         // Now we have a wxKeyEvent and we have a wxWindow.
 577         // Go up the hierarchy until we find a matching accelerator,
 578         // or we get to the top.
 579         while (win)
 580         {
 581             if (win->ProcessAccelerator(keyEvent))
 582                 return TRUE;
 583             win = win->GetParent();
 584         }
 585         return FALSE;
 586     }
 587     return FALSE;
 588 }
 589
 590 void wxExit()
 591 {
 592     int retValue = 0;
 593     if (wxTheApp)
 594         retValue = wxTheApp->OnExit();
 595
 596     wxApp::CleanUp();
 597     /*
 598     * Exit in some platform-specific way. Not recommended that the app calls this:
 599     * only for emergencies.
 600     */
 601     exit(retValue);
 602 }
 603
 604 // Yield to other processes
 605 bool wxYield()
 606 {
 607     while (wxTheApp && wxTheApp->Pending())
 608         wxTheApp->Dispatch();
 609
 610     // VZ: is it the same as this (taken from old wxExecute)?
 611 #if 0
 612     XtAppProcessEvent((XtAppContext) wxTheApp->GetAppContext(), XtIMAll);
 613 #endif
 614
 615     return TRUE;
 616 }
 617