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     #pragma implementation "appbase.h"
  15 #endif
  16
  17 #include "wx/frame.h"
  18 #include "wx/app.h"
  19 #include "wx/utils.h"
  20 #include "wx/gdicmn.h"
  21 #include "wx/pen.h"
  22 #include "wx/brush.h"
  23 #include "wx/cursor.h"
  24 #include "wx/icon.h"
  25 #include "wx/palette.h"
  26 #include "wx/dc.h"
  27 #include "wx/dialog.h"
  28 #include "wx/msgdlg.h"
  29 #include "wx/log.h"
  30 #include "wx/module.h"
  31 #include "wx/memory.h"
  32 #include "wx/log.h"
  33 #include "wx/intl.h"
  34
  35 #if wxUSE_THREADS
  36     #include "wx/thread.h"
  37 #endif
  38
  39 #if wxUSE_WX_RESOURCES
  40     #include "wx/resource.h"
  41 #endif
  42
  43 #include <Xm/Xm.h>
  44 #include <X11/Xlib.h>
  45 #include <X11/Xutil.h>
  46 #include <X11/Xresource.h>
  47 #include <X11/Xatom.h>
  48
  49 #include "wx/motif/private.h"
  50
  51 #include <string.h>
  52
  53 extern char *wxBuffer;
  54 extern wxList wxPendingDelete;
  55
  56 wxApp *wxTheApp = NULL;
  57
  58 wxHashTable *wxWidgetHashTable = NULL;
  59
  60 #if !USE_SHARED_LIBRARY
  61 IMPLEMENT_DYNAMIC_CLASS(wxApp, wxEvtHandler)
  62
  63 BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
  64     EVT_IDLE(wxApp::OnIdle)
  65 END_EVENT_TABLE()
  66 #endif
  67
  68 long wxApp::sm_lastMessageTime = 0;
  69
  70 bool wxApp::Initialize()
  71 {
  72     wxBuffer = new char[BUFSIZ + 512];
  73
  74     wxClassInfo::InitializeClasses();
  75
  76     // GL: I'm annoyed ... I don't know where to put this and I don't want to
  77     // create a module for that as it's part of the core.
  78 #if wxUSE_THREADS
  79     wxPendingEventsLocker = new wxCriticalSection();
  80 #endif
  81
  82     wxTheColourDatabase = new wxColourDatabase(wxKEY_STRING);
  83     wxTheColourDatabase->Initialize();
  84
  85     wxInitializeStockLists();
  86     wxInitializeStockObjects();
  87
  88 #if wxUSE_WX_RESOURCES
  89     wxInitializeResourceSystem();
  90 #endif
  91
  92     // For PostScript printing
  93 #if wxUSE_POSTSCRIPT
  94     /* Done using wxModule now
  95     wxInitializePrintSetupData();
  96     wxThePrintPaperDatabase = new wxPrintPaperDatabase;
  97     wxThePrintPaperDatabase->CreateDatabase();
  98     */
  99 #endif
 100
 101     wxBitmap::InitStandardHandlers();
 102
 103     wxWidgetHashTable = new wxHashTable(wxKEY_INTEGER);
 104
 105     wxModule::RegisterModules();
 106     if (!wxModule::InitializeModules()) return FALSE;
 107
 108     return TRUE;
 109 }
 110
 111 void wxApp::CleanUp()
 112 {
 113     delete wxWidgetHashTable;
 114     wxWidgetHashTable = NULL;
 115
 116     wxModule::CleanUpModules();
 117
 118 #if wxUSE_WX_RESOURCES
 119     wxCleanUpResourceSystem();
 120 #endif
 121
 122     wxDeleteStockObjects() ;
 123
 124     // Destroy all GDI lists, etc.
 125
 126     delete wxTheBrushList;
 127     wxTheBrushList = NULL;
 128
 129     delete wxThePenList;
 130     wxThePenList = NULL;
 131
 132     delete wxTheFontList;
 133     wxTheFontList = NULL;
 134
 135     delete wxTheBitmapList;
 136     wxTheBitmapList = NULL;
 137
 138     delete wxTheColourDatabase;
 139     wxTheColourDatabase = NULL;
 140
 141 #if wxUSE_POSTSCRIPT
 142     /* Done using wxModule now
 143     wxInitializePrintSetupData(FALSE);
 144     delete wxThePrintPaperDatabase;
 145     wxThePrintPaperDatabase = NULL;
 146     */
 147 #endif
 148
 149     wxBitmap::CleanUpHandlers();
 150
 151     delete[] wxBuffer;
 152     wxBuffer = NULL;
 153
 154     wxClassInfo::CleanUpClasses();
 155
 156     delete wxTheApp;
 157     wxTheApp = NULL;
 158
 159     // GL: I'm annoyed ... I don't know where to put this and I don't want to
 160     // create a module for that as it's part of the core.
 161 #if wxUSE_THREADS
 162     delete wxPendingEvents;
 163     delete wxPendingEventsLocker;
 164 #endif
 165
 166 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 167     // At this point we want to check if there are any memory
 168     // blocks that aren't part of the wxDebugContext itself,
 169     // as a special case. Then when dumping we need to ignore
 170     // wxDebugContext, too.
 171     if (wxDebugContext::CountObjectsLeft(TRUE) > 0)
 172     {
 173         wxLogDebug("There were memory leaks.\n");
 174         wxDebugContext::Dump();
 175         wxDebugContext::PrintStatistics();
 176     }
 177 #endif
 178
 179     // do it as the very last thing because everything else can log messages
 180     wxLog::DontCreateOnDemand();
 181     // do it as the very last thing because everything else can log messages
 182     delete wxLog::SetActiveTarget(NULL);
 183 }
 184
 185 int wxEntry( int argc, char *argv[] )
 186 {
 187 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 188     // This seems to be necessary since there are 'rogue'
 189     // objects present at this point (perhaps global objects?)
 190     // Setting a checkpoint will ignore them as far as the
 191     // memory checking facility is concerned.
 192     // Of course you may argue that memory allocated in globals should be
 193     // checked, but this is a reasonable compromise.
 194     wxDebugContext::SetCheckpoint();
 195 #endif
 196
 197     if (!wxApp::Initialize())
 198         return FALSE;
 199
 200     if (!wxTheApp)
 201     {
 202         if (!wxApp::GetInitializerFunction())
 203         {
 204             printf( "wxWindows error: No initializer - use IMPLEMENT_APP macro.\n" );
 205             return 0;
 206         };
 207
 208         wxTheApp = (wxApp*) (* wxApp::GetInitializerFunction()) ();
 209     };
 210
 211     if (!wxTheApp)
 212     {
 213         printf( "wxWindows error: wxTheApp == NULL\n" );
 214         return 0;
 215     };
 216
 217     wxTheApp->SetClassName(wxFileNameFromPath(argv[0]));
 218     wxTheApp->SetAppName(wxFileNameFromPath(argv[0]));
 219
 220     wxTheApp->argc = argc;
 221     wxTheApp->argv = argv;
 222
 223     // GUI-specific initialization, such as creating an app context.
 224     wxTheApp->OnInitGui();
 225
 226     // Here frames insert themselves automatically into wxTopLevelWindows by
 227     // getting created in OnInit().
 228
 229     int retValue = 0;
 230     if (wxTheApp->OnInit())
 231     {
 232         if (wxTheApp->Initialized()) retValue = wxTheApp->OnRun();
 233     }
 234
 235     // flush the logged messages if any
 236     wxLog *pLog = wxLog::GetActiveTarget();
 237     if ( pLog != NULL && pLog->HasPendingMessages() )
 238         pLog->Flush();
 239
 240     delete wxLog::SetActiveTarget(new wxLogStderr); // So dialog boxes aren't used
 241     // for further messages
 242
 243     if (wxTheApp->GetTopWindow())
 244     {
 245         delete wxTheApp->GetTopWindow();
 246         wxTheApp->SetTopWindow(NULL);
 247     }
 248
 249     wxTheApp->DeletePendingObjects();
 250
 251     wxTheApp->OnExit();
 252
 253     wxApp::CleanUp();
 254
 255     return retValue;
 256 };
 257
 258 // Static member initialization
 259 wxAppInitializerFunction wxAppBase::m_appInitFn = (wxAppInitializerFunction) NULL;
 260
 261 wxApp::wxApp()
 262 {
 263     m_topWindow = NULL;
 264     wxTheApp = this;
 265     m_className = "";
 266     m_wantDebugOutput = TRUE ;
 267     m_appName = "";
 268     argc = 0;
 269     argv = NULL;
 270     m_exitOnFrameDelete = TRUE;
 271
 272     m_mainColormap = (WXColormap) NULL;
 273     m_appContext = (WXAppContext) NULL;
 274     m_topLevelWidget = (WXWidget) NULL;
 275     m_maxRequestSize = 0;
 276     m_initialDisplay = (WXDisplay*) 0;
 277 }
 278
 279 bool wxApp::Initialized()
 280 {
 281     if (GetTopWindow())
 282         return TRUE;
 283     else
 284         return FALSE;
 285 }
 286
 287 int wxApp::MainLoop()
 288 {
 289     m_keepGoing = TRUE;
 290
 291     /*
 292     * Sit around forever waiting to process X-events. Property Change
 293     * event are handled special, because they have to refer to
 294     * the root window rather than to a widget. therefore we can't
 295     * use an Xt-eventhandler.
 296     */
 297
 298     XSelectInput(XtDisplay((Widget) wxTheApp->GetTopLevelWidget()),
 299         XDefaultRootWindow(XtDisplay((Widget) wxTheApp->GetTopLevelWidget())),
 300         PropertyChangeMask);
 301
 302     XEvent event;
 303
 304     // Use this flag to allow breaking the loop via wxApp::ExitMainLoop()
 305     while (m_keepGoing)
 306     {
 307         XtAppNextEvent( (XtAppContext) wxTheApp->GetAppContext(), &event);
 308
 309         ProcessXEvent((WXEvent*) & event);
 310
 311         if (XtAppPending( (XtAppContext) wxTheApp->GetAppContext() ) == 0)
 312         {
 313             if (!ProcessIdle())
 314             {
 315 #if wxUSE_THREADS
 316                 // leave the main loop to give other threads a chance to
 317                 // perform their GUI work
 318                 wxMutexGuiLeave();
 319                 wxUsleep(20);
 320                 wxMutexGuiEnter();
 321 #endif
 322             }
 323         }
 324
 325     }
 326
 327     return 0;
 328 }
 329
 330 // Processes an X event.
 331 void wxApp::ProcessXEvent(WXEvent* _event)
 332 {
 333     XEvent* event = (XEvent*) _event;
 334
 335     if (event->type == KeyPress)
 336     {
 337 #ifdef __WXDEBUG__
 338         Widget widget = XtWindowToWidget(event->xany.display, event->xany.window);
 339         wxLogDebug("Got key press event for 0x%08x (parent = 0x%08x)",
 340                    widget, XtParent(widget));
 341 #endif // DEBUG
 342
 343         if (CheckForAccelerator(_event))
 344         {
 345             // Do nothing! We intercepted and processed the event as an
 346             // accelerator.
 347             return;
 348         }
 349 #if 1
 350         // It seemed before that this hack was redundant and
 351         // key down events were being generated by wxCanvasInputEvent.
 352         // But no longer - why ???
 353         //
 354         else if (CheckForKeyDown(_event))
 355         {
 356             // We intercepted and processed the key down event
 357             return;
 358         }
 359 #endif
 360         else
 361         {
 362             XtDispatchEvent(event);
 363             return;
 364         }
 365     }
 366     else if (event->type == KeyRelease)
 367     {
 368         // TODO: work out why we still need this !  -michael
 369         //
 370         if (CheckForKeyUp(_event))
 371         {
 372             // We intercepted and processed the key up event
 373             return;
 374         }
 375         else
 376         {
 377             XtDispatchEvent(event);
 378             return;
 379         }
 380     }
 381     else if (event->type == PropertyNotify)
 382     {
 383         HandlePropertyChange(_event);
 384         return;
 385     }
 386     else if (event->type == ResizeRequest)
 387     {
 388         /* Terry Gitnick <terryg@scientech.com> - 1/21/98
 389          * If resize event, don't resize until the last resize event for this
 390          * window is recieved. Prevents flicker as windows are resized.
 391          */
 392
 393         Display *disp = XtDisplay((Widget) wxTheApp->GetTopLevelWidget());
 394         Window win = event->xany.window;
 395         XEvent report;
 396
 397         //  to avoid flicker
 398         report = * event;
 399         while( XCheckTypedWindowEvent (disp, win, ResizeRequest, &report));
 400
 401         // TODO: when implementing refresh optimization, we can use
 402         // XtAddExposureToRegion to expand the window's paint region.
 403
 404         XtDispatchEvent(event);
 405     }
 406     else
 407     {
 408         XtDispatchEvent(event);
 409     }
 410 }
 411
 412 // Returns TRUE if more time is needed.
 413 bool wxApp::ProcessIdle()
 414 {
 415     wxIdleEvent event;
 416     event.SetEventObject(this);
 417     ProcessEvent(event);
 418
 419     return event.MoreRequested();
 420 }
 421
 422 void wxApp::ExitMainLoop()
 423 {
 424     m_keepGoing = FALSE;
 425 }
 426
 427 // Is a message/event pending?
 428 bool wxApp::Pending()
 429 {
 430     XFlush(XtDisplay( (Widget) wxTheApp->GetTopLevelWidget() ));
 431
 432     // Fix by Doug from STI, to prevent a stall if non-X event
 433     // is found.
 434     return ((XtAppPending( (XtAppContext) GetAppContext() ) & XtIMXEvent) != 0) ;
 435 }
 436
 437 // Dispatch a message.
 438 void wxApp::Dispatch()
 439 {
 440     //    XtAppProcessEvent( (XtAppContext) wxTheApp->GetAppContext(), XtIMAll);
 441
 442     XEvent event;
 443     XtAppNextEvent((XtAppContext) GetAppContext(), &event);
 444     ProcessXEvent((WXEvent*) & event);
 445 }
 446
 447 // This should be redefined in a derived class for
 448 // handling property change events for XAtom IPC.
 449 void wxApp::HandlePropertyChange(WXEvent *event)
 450 {
 451     // by default do nothing special
 452     XtDispatchEvent((XEvent*) event); /* let Motif do the work */
 453 }
 454
 455 void wxApp::OnIdle(wxIdleEvent& event)
 456 {
 457     static bool inOnIdle = FALSE;
 458
 459     // Avoid recursion (via ProcessEvent default case)
 460     if (inOnIdle)
 461         return;
 462
 463     inOnIdle = TRUE;
 464
 465     // 'Garbage' collection of windows deleted with Close().
 466     DeletePendingObjects();
 467
 468 #if wxUSE_THREADS
 469     // Flush pending events.
 470     ProcessPendingEvents();
 471 #endif
 472
 473     // flush the logged messages if any
 474     wxLog *pLog = wxLog::GetActiveTarget();
 475     if ( pLog != NULL && pLog->HasPendingMessages() )
 476         pLog->Flush();
 477
 478     // Send OnIdle events to all windows
 479     bool needMore = SendIdleEvents();
 480
 481     if (needMore)
 482         event.RequestMore(TRUE);
 483
 484     inOnIdle = FALSE;
 485 }
 486
 487 // Send idle event to all top-level windows
 488 bool wxApp::SendIdleEvents()
 489 {
 490     bool needMore = FALSE;
 491
 492     wxWindowList::Node* node = wxTopLevelWindows.GetFirst();
 493     while (node)
 494     {
 495         wxWindow* win = node->GetData();
 496         if (SendIdleEvents(win))
 497             needMore = TRUE;
 498         node = node->GetNext();
 499     }
 500
 501     return needMore;
 502 }
 503
 504 // Send idle event to window and all subwindows
 505 bool wxApp::SendIdleEvents(wxWindow* win)
 506 {
 507     bool needMore = FALSE;
 508
 509     wxIdleEvent event;
 510     event.SetEventObject(win);
 511     win->ProcessEvent(event);
 512
 513     if (event.MoreRequested())
 514         needMore = TRUE;
 515
 516     wxNode* node = win->GetChildren().First();
 517     while (node)
 518     {
 519         wxWindow* win = (wxWindow*) node->Data();
 520         if (SendIdleEvents(win))
 521             needMore = TRUE;
 522
 523         node = node->Next();
 524     }
 525     return needMore ;
 526 }
 527
 528 void wxApp::DeletePendingObjects()
 529 {
 530     wxNode *node = wxPendingDelete.First();
 531     while (node)
 532     {
 533         wxObject *obj = (wxObject *)node->Data();
 534
 535         delete obj;
 536
 537         if (wxPendingDelete.Member(obj))
 538             delete node;
 539
 540         // Deleting one object may have deleted other pending
 541         // objects, so start from beginning of list again.
 542         node = wxPendingDelete.First();
 543     }
 544 }
 545
 546 // Create an application context
 547 bool wxApp::OnInitGui()
 548 {
 549     XtToolkitInitialize() ;
 550     wxTheApp->m_appContext = (WXAppContext) XtCreateApplicationContext() ;
 551     Display *dpy = XtOpenDisplay((XtAppContext) wxTheApp->m_appContext,(String)NULL,NULL,
 552         (const char*) wxTheApp->GetClassName(), NULL, 0,
 553 # if XtSpecificationRelease < 5
 554         (Cardinal*) &argc,
 555 # else
 556         &argc,
 557 # endif
 558         argv);
 559
 560     if (!dpy) {
 561         wxString className(wxTheApp->GetClassName());
 562         wxLogError(_("wxWindows could not open display for '%s': exiting."),
 563                    (const char*) className);
 564         exit(-1);
 565     }
 566     m_initialDisplay = (WXDisplay*) dpy;
 567
 568     wxTheApp->m_topLevelWidget = (WXWidget) XtAppCreateShell((String)NULL, (const char*) wxTheApp->GetClassName(),
 569         applicationShellWidgetClass,dpy,
 570         NULL,0) ;
 571
 572     // Add general resize proc
 573     XtActionsRec rec;
 574     rec.string = "resize";
 575     rec.proc = (XtActionProc)wxWidgetResizeProc;
 576     XtAppAddActions((XtAppContext) wxTheApp->m_appContext, &rec, 1);
 577
 578     GetMainColormap(dpy);
 579     m_maxRequestSize = XMaxRequestSize((Display*) dpy);
 580
 581     return TRUE;
 582 }
 583
 584 WXColormap wxApp::GetMainColormap(WXDisplay* display)
 585 {
 586     if (!display) /* Must be called first with non-NULL display */
 587         return m_mainColormap;
 588
 589     int defaultScreen = DefaultScreen((Display*) display);
 590     Screen* screen = XScreenOfDisplay((Display*) display, defaultScreen);
 591
 592     Colormap c = DefaultColormapOfScreen(screen);
 593
 594     if (!m_mainColormap)
 595         m_mainColormap = (WXColormap) c;
 596
 597     return (WXColormap) c;
 598 }
 599
 600 // Returns TRUE if an accelerator has been processed
 601 bool wxApp::CheckForAccelerator(WXEvent* event)
 602 {
 603     XEvent* xEvent = (XEvent*) event;
 604     if (xEvent->xany.type == KeyPress)
 605     {
 606         // Find a wxWindow for this window
 607         // TODO: should get display for the window, not the current display
 608         Widget widget = XtWindowToWidget((Display*) wxGetDisplay(), xEvent->xany.window);
 609         wxWindow* win = NULL;
 610
 611         // Find the first wxWindow that corresponds to this event window
 612         while (widget && !(win = wxGetWindowFromTable(widget)))
 613             widget = XtParent(widget);
 614
 615         if (!widget || !win)
 616             return FALSE;
 617
 618         wxKeyEvent keyEvent(wxEVT_CHAR);
 619         wxTranslateKeyEvent(keyEvent, win, (Widget) 0, xEvent);
 620
 621         // Now we have a wxKeyEvent and we have a wxWindow.
 622         // Go up the hierarchy until we find a matching accelerator,
 623         // or we get to the top.
 624         while (win)
 625         {
 626             if (win->ProcessAccelerator(keyEvent))
 627                 return TRUE;
 628             win = win->GetParent();
 629         }
 630         return FALSE;
 631     }
 632     return FALSE;
 633 }
 634
 635 bool wxApp::CheckForKeyDown(WXEvent* event)
 636 {
 637     XEvent* xEvent = (XEvent*) event;
 638     if (xEvent->xany.type == KeyPress)
 639     {
 640         Widget widget = XtWindowToWidget((Display*) wxGetDisplay(),
 641                                          xEvent->xany.window);
 642         wxWindow* win = NULL;
 643
 644         // Find the first wxWindow that corresponds to this event window
 645         while (widget && !(win = wxGetWindowFromTable(widget)))
 646             widget = XtParent(widget);
 647
 648         if (!widget || !win)
 649             return FALSE;
 650
 651         wxKeyEvent keyEvent(wxEVT_KEY_DOWN);
 652         wxTranslateKeyEvent(keyEvent, win, (Widget) 0, xEvent);
 653
 654         return win->ProcessEvent( keyEvent );
 655     }
 656
 657     return FALSE;
 658 }
 659
 660 bool wxApp::CheckForKeyUp(WXEvent* event)
 661 {
 662     XEvent* xEvent = (XEvent*) event;
 663     if (xEvent->xany.type == KeyRelease)
 664     {
 665         Widget widget = XtWindowToWidget((Display*) wxGetDisplay(),
 666                                          xEvent->xany.window);
 667         wxWindow* win = NULL;
 668
 669         // Find the first wxWindow that corresponds to this event window
 670         while (widget && !(win = wxGetWindowFromTable(widget)))
 671             widget = XtParent(widget);
 672
 673         if (!widget || !win)
 674             return FALSE;
 675
 676         wxKeyEvent keyEvent(wxEVT_KEY_UP);
 677         wxTranslateKeyEvent(keyEvent, win, (Widget) 0, xEvent);
 678
 679         return win->ProcessEvent( keyEvent );
 680     }
 681
 682     return FALSE;
 683 }
 684
 685 void wxExit()
 686 {
 687     int retValue = 0;
 688     if (wxTheApp)
 689         retValue = wxTheApp->OnExit();
 690
 691     wxApp::CleanUp();
 692     /*
 693     * Exit in some platform-specific way. Not recommended that the app calls this:
 694     * only for emergencies.
 695     */
 696     exit(retValue);
 697 }
 698
 699 // Yield to other processes
 700 bool wxYield()
 701 {
 702     while (wxTheApp && wxTheApp->Pending())
 703         wxTheApp->Dispatch();
 704
 705     // VZ: is it the same as this (taken from old wxExecute)?
 706 #if 0
 707     XtAppProcessEvent((XtAppContext) wxTheApp->GetAppContext(), XtIMAll);
 708 #endif
 709
 710     return TRUE;
 711 }
 712
 713 // TODO use XmGetPixmap (?) to get the really standard icons!
 714
 715 #include "wx/generic/info.xpm"
 716 #include "wx/generic/error.xpm"
 717 #include "wx/generic/question.xpm"
 718 #include "wx/generic/warning.xpm"
 719
 720 wxIcon
 721 wxApp::GetStdIcon(int which) const
 722 {
 723     switch(which)
 724     {
 725         case wxICON_INFORMATION:
 726             return wxIcon(info_xpm);
 727
 728         case wxICON_QUESTION:
 729             return wxIcon(question_xpm);
 730
 731         case wxICON_EXCLAMATION:
 732             return wxIcon(warning_xpm);
 733
 734         default:
 735             wxFAIL_MSG("requested non existent standard icon");
 736             // still fall through
 737
 738         case wxICON_HAND:
 739             return wxIcon(error_xpm);
 740     }
 741 }
 742
 743 // ----------------------------------------------------------------------------
 744 // accessors for C modules
 745 // ----------------------------------------------------------------------------
 746
 747 extern "C" XtAppContext wxGetAppContext()
 748 {
 749     return (XtAppContext)wxTheApp->GetAppContext();
 750 }