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 (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     wxInitializeStockObjects();
  83
  84 #if wxUSE_WX_RESOURCES
  85     wxInitializeResourceSystem();
  86 #endif
  87
  88   // For PostScript printing
  89 #if wxUSE_POSTSCRIPT
  90 /* Done using wxModule now
  91     wxInitializePrintSetupData();
  92     wxThePrintPaperDatabase = new wxPrintPaperDatabase;
  93     wxThePrintPaperDatabase->CreateDatabase();
  94 */
  95 #endif
  96
  97     wxBitmap::InitStandardHandlers();
  98
  99     wxWidgetHashTable = new wxHashTable(wxKEY_INTEGER);
 100
 101     wxModule::RegisterModules();
 102     wxASSERT( wxModule::InitializeModules() == TRUE );
 103
 104     return TRUE;
 105 }
 106
 107 void wxApp::CleanUp()
 108 {
 109     delete wxWidgetHashTable;
 110     wxWidgetHashTable = NULL;
 111
 112     wxModule::CleanUpModules();
 113
 114 #if wxUSE_WX_RESOURCES
 115     wxCleanUpResourceSystem();
 116 #endif
 117
 118     wxDeleteStockObjects() ;
 119
 120     // Destroy all GDI lists, etc.
 121
 122     delete wxTheBrushList;
 123     wxTheBrushList = NULL;
 124
 125     delete wxThePenList;
 126     wxThePenList = NULL;
 127
 128     delete wxTheFontList;
 129     wxTheFontList = NULL;
 130
 131     delete wxTheBitmapList;
 132     wxTheBitmapList = NULL;
 133
 134     delete wxTheColourDatabase;
 135     wxTheColourDatabase = NULL;
 136
 137 #if wxUSE_POSTSCRIPT
 138 /* Done using wxModule now
 139     wxInitializePrintSetupData(FALSE);
 140     delete wxThePrintPaperDatabase;
 141     wxThePrintPaperDatabase = NULL;
 142 */
 143 #endif
 144
 145     wxBitmap::CleanUpHandlers();
 146
 147     delete[] wxBuffer;
 148     wxBuffer = NULL;
 149
 150     wxClassInfo::CleanUpClasses();
 151
 152     // do it as the very last thing because everything else can log messages
 153     wxLog::DontCreateOnDemand();
 154     // do it as the very last thing because everything else can log messages
 155     delete wxLog::SetActiveTarget(NULL);
 156 }
 157
 158 int wxEntry( int argc, char *argv[] )
 159 {
 160     if (!wxApp::Initialize())
 161       return FALSE;
 162     if (!wxTheApp)
 163     {
 164       if (!wxApp::GetInitializerFunction())
 165       {
 166         printf( "wxWindows error: No initializer - use IMPLEMENT_APP macro.\n" );
 167         return 0;
 168       };
 169
 170         wxTheApp = (wxApp*) (* wxApp::GetInitializerFunction()) ();
 171     };
 172
 173     if (!wxTheApp)
 174     {
 175       printf( "wxWindows error: wxTheApp == NULL\n" );
 176       return 0;
 177     };
 178
 179     wxTheApp->SetClassName(wxFileNameFromPath(argv[0]));
 180     wxTheApp->SetAppName(wxFileNameFromPath(argv[0]));
 181
 182     wxTheApp->argc = argc;
 183     wxTheApp->argv = argv;
 184
 185     // GUI-specific initialization, such as creating an app context.
 186     wxTheApp->OnInitGui();
 187
 188     // Here frames insert themselves automatically
 189     // into wxTopLevelWindows by getting created
 190     // in OnInit().
 191
 192     if (!wxTheApp->OnInit()) return 0;
 193
 194     int retValue = 0;
 195
 196     if (wxTheApp->Initialized()) retValue = wxTheApp->OnRun();
 197
 198     if (wxTheApp->GetTopWindow())
 199     {
 200       delete wxTheApp->GetTopWindow();
 201       wxTheApp->SetTopWindow(NULL);
 202     }
 203
 204     wxTheApp->DeletePendingObjects();
 205
 206     wxTheApp->OnExit();
 207
 208     wxApp::CleanUp();
 209
 210     delete wxTheApp;
 211     wxTheApp = NULL;
 212
 213 #if (WXDEBUG && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 214     // At this point we want to check if there are any memory
 215     // blocks that aren't part of the wxDebugContext itself,
 216     // as a special case. Then when dumping we need to ignore
 217     // wxDebugContext, too.
 218     if (wxDebugContext::CountObjectsLeft() > 0)
 219     {
 220       wxTrace("There were memory leaks.\n");
 221       wxDebugContext::Dump();
 222       wxDebugContext::PrintStatistics();
 223     }
 224     wxDebugContext::SetStream(NULL, NULL);
 225 #endif
 226
 227     return retValue;
 228 };
 229
 230 // Static member initialization
 231 wxAppInitializerFunction wxApp::m_appInitFn = (wxAppInitializerFunction) NULL;
 232
 233 wxApp::wxApp()
 234 {
 235     m_topWindow = NULL;
 236     wxTheApp = this;
 237     m_className = "";
 238     m_wantDebugOutput = TRUE ;
 239     m_appName = "";
 240     argc = 0;
 241     argv = NULL;
 242     m_printMode = wxPRINT_POSTSCRIPT;
 243     m_exitOnFrameDelete = TRUE;
 244     m_auto3D = TRUE;
 245
 246     m_mainColormap = (WXColormap) NULL;
 247     m_appContext = (WXAppContext) NULL;
 248     m_topLevelWidget = (WXWidget) NULL;
 249     m_maxRequestSize = 0;
 250     m_initialDisplay = (WXDisplay*) 0;
 251 }
 252
 253 bool wxApp::Initialized()
 254 {
 255     if (GetTopWindow())
 256       return TRUE;
 257     else
 258       return FALSE;
 259 }
 260
 261 int wxApp::MainLoop()
 262 {
 263     m_keepGoing = TRUE;
 264
 265    /*
 266     * Sit around forever waiting to process X-events. Property Change
 267     * event are handled special, because they have to refer to
 268     * the root window rather than to a widget. therefore we can't
 269     * use an Xt-eventhandler.
 270     */
 271
 272     XSelectInput(XtDisplay((Widget) wxTheApp->GetTopLevelWidget()),
 273                  XDefaultRootWindow(XtDisplay((Widget) wxTheApp->GetTopLevelWidget())),
 274                  PropertyChangeMask);
 275
 276     XEvent event;
 277
 278     // Use this flag to allow breaking the loop via wxApp::ExitMainLoop()
 279     while (m_keepGoing)
 280     {
 281       XtAppNextEvent( (XtAppContext) wxTheApp->GetAppContext(), &event);
 282       if(event.type == PropertyNotify)
 283       {
 284         HandlePropertyChange((WXEvent*) &event);
 285       } else
 286       {
 287         // Terry Gitnick <terryg@scientech.com> - 1/21/98
 288          /* if resize event, don't resize until the last resize event for this
 289             window is recieved. Prevents flicker as windows are resized. */
 290         if (event.type == ResizeRequest)
 291         {
 292            Display *disp = XtDisplay((Widget) wxTheApp->GetTopLevelWidget());
 293            Window win = event.xany.window;
 294            XEvent report;
 295
 296            //  to avoid flicker
 297            report = event;
 298            while( XCheckTypedWindowEvent (disp, win, ResizeRequest, &report));
 299         }
 300         // TODO: when implementing refresh optimization, we can use
 301         // XtAddExposureToRegion to expand the window's paint region.
 302
 303         XtDispatchEvent(&event);
 304
 305         ProcessIdle();
 306       }
 307     }
 308
 309     return 0;
 310 }
 311
 312 // Returns TRUE if more time is needed.
 313 bool wxApp::ProcessIdle()
 314 {
 315     wxIdleEvent event;
 316     event.SetEventObject(this);
 317     ProcessEvent(event);
 318
 319     return event.MoreRequested();
 320 }
 321
 322 void wxApp::ExitMainLoop()
 323 {
 324     m_keepGoing = FALSE;
 325 }
 326
 327 // Is a message/event pending?
 328 bool wxApp::Pending()
 329 {
 330     XFlush(XtDisplay( (Widget) wxTheApp->GetTopLevelWidget() ));
 331     return (XtAppPending( (XtAppContext) wxTheApp->GetAppContext() ) != 0) ;
 332 }
 333
 334 // Dispatch a message.
 335 void wxApp::Dispatch()
 336 {
 337     XtAppProcessEvent( (XtAppContext) wxTheApp->GetAppContext(), XtIMAll);
 338 }
 339
 340 // This should be redefined in a derived class for
 341 // handling property change events for XAtom IPC.
 342 void wxApp::HandlePropertyChange(WXEvent *event)
 343 {
 344     // by default do nothing special
 345     XtDispatchEvent((XEvent*) event); /* let Motif do the work */
 346 }
 347
 348 void wxApp::OnIdle(wxIdleEvent& event)
 349 {
 350     static bool inOnIdle = FALSE;
 351
 352     // Avoid recursion (via ProcessEvent default case)
 353     if (inOnIdle)
 354       return;
 355
 356     inOnIdle = TRUE;
 357
 358     // 'Garbage' collection of windows deleted with Close().
 359     DeletePendingObjects();
 360
 361     // flush the logged messages if any
 362     wxLog *pLog = wxLog::GetActiveTarget();
 363     if ( pLog != NULL && pLog->HasPendingMessages() )
 364       pLog->Flush();
 365
 366     // Send OnIdle events to all windows
 367     bool needMore = SendIdleEvents();
 368
 369     if (needMore)
 370       event.RequestMore(TRUE);
 371
 372     inOnIdle = FALSE;
 373 }
 374
 375 // Send idle event to all top-level windows
 376 bool wxApp::SendIdleEvents()
 377 {
 378     bool needMore = FALSE;
 379         wxNode* node = wxTopLevelWindows.First();
 380         while (node)
 381         {
 382                 wxWindow* win = (wxWindow*) node->Data();
 383                 if (SendIdleEvents(win))
 384             needMore = TRUE;
 385
 386                 node = node->Next();
 387         }
 388     return needMore;
 389 }
 390
 391 // Send idle event to window and all subwindows
 392 bool wxApp::SendIdleEvents(wxWindow* win)
 393 {
 394     bool needMore = FALSE;
 395
 396         wxIdleEvent event;
 397         event.SetEventObject(win);
 398         win->ProcessEvent(event);
 399
 400     if (event.MoreRequested())
 401         needMore = TRUE;
 402
 403         wxNode* node = win->GetChildren()->First();
 404         while (node)
 405         {
 406                 wxWindow* win = (wxWindow*) node->Data();
 407                 if (SendIdleEvents(win))
 408             needMore = TRUE;
 409
 410                 node = node->Next();
 411         }
 412     return needMore ;
 413 }
 414
 415 void wxApp::DeletePendingObjects()
 416 {
 417     wxNode *node = wxPendingDelete.First();
 418     while (node)
 419     {
 420       wxObject *obj = (wxObject *)node->Data();
 421
 422       delete obj;
 423
 424       if (wxPendingDelete.Member(obj))
 425         delete node;
 426
 427       // Deleting one object may have deleted other pending
 428       // objects, so start from beginning of list again.
 429       node = wxPendingDelete.First();
 430     }
 431 }
 432
 433 wxLog* wxApp::CreateLogTarget()
 434 {
 435     return new wxLogGui;
 436 }
 437
 438 wxWindow* wxApp::GetTopWindow() const
 439 {
 440     if (m_topWindow)
 441         return m_topWindow;
 442     else if (wxTopLevelWindows.Number() > 0)
 443         return (wxWindow*) wxTopLevelWindows.First()->Data();
 444     else
 445         return NULL;
 446 }
 447
 448 // Create an application context
 449 bool wxApp::OnInitGui()
 450 {
 451     XtToolkitInitialize() ;
 452     wxTheApp->m_appContext = (WXAppContext) XtCreateApplicationContext() ;
 453     Display *dpy = XtOpenDisplay((XtAppContext) wxTheApp->m_appContext,(String)NULL,NULL,
 454                             (const char*) wxTheApp->GetClassName(), NULL,
 455 # if XtSpecificationRelease < 5
 456                             0,(Cardinal*) &argc,argv) ;
 457 # else
 458                             0,&argc,argv) ;
 459 # endif
 460     if (!dpy) {
 461       cerr << "wxWindows could not open display for " << wxTheApp->GetClassName() << ": exiting.\n";
 462       exit(-1);
 463     }
 464     m_initialDisplay = (WXDisplay*) dpy;
 465
 466     wxTheApp->m_topLevelWidget = (WXWidget) XtAppCreateShell((String)NULL, (const char*) wxTheApp->GetClassName(),
 467                                      applicationShellWidgetClass,dpy,
 468                                      NULL,0) ;
 469
 470     // Add general resize proc
 471     XtActionsRec rec;
 472     rec.string = "resize";
 473     rec.proc = (XtActionProc)wxWidgetResizeProc;
 474     XtAppAddActions((XtAppContext) wxTheApp->m_appContext, &rec, 1);
 475
 476     GetMainColormap(dpy);
 477     m_maxRequestSize = XMaxRequestSize((Display*) dpy);
 478
 479     return TRUE;
 480 }
 481
 482 WXColormap wxApp::GetMainColormap(WXDisplay* display)
 483 {
 484     if (!display) /* Must be called first with non-NULL display */
 485       return m_mainColormap;
 486
 487     Colormap c =
 488       DefaultColormapOfScreen(XScreenOfDisplay((Display*) display,
 489                                              DefaultScreen((Display*) display)));
 490
 491     if (!m_mainColormap)
 492       m_mainColormap = (WXColormap) c;
 493
 494     return (WXColormap) c;
 495 }
 496
 497 void wxExit()
 498 {
 499     int retValue = 0;
 500     if (wxTheApp)
 501       retValue = wxTheApp->OnExit();
 502
 503     wxApp::CleanUp();
 504     /*
 505      * Exit in some platform-specific way. Not recommended that the app calls this:
 506      * only for emergencies.
 507      */
 508     exit(retValue);
 509 }
 510
 511 // Yield to other processes
 512 bool wxYield()
 513 {
 514     while (wxTheApp && wxTheApp->Pending())
 515       wxTheApp->Dispatch();
 516     return TRUE;
 517 }
 518