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