src/gtk/app.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk/app.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Id:          $Id$
   6 // Copyright:   (c) 1998 Robert Roebling, Julian Smart
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 #ifdef __VMS
  11 // vms_jackets.h should for proper working be included before anything else
  12 # include <vms_jackets.h>
  13 #undef ConnectionNumber
  14 #endif
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #include "wx/app.h"
  20
  21 #ifndef WX_PRECOMP
  22     #include "wx/intl.h"
  23     #include "wx/log.h"
  24     #include "wx/utils.h"
  25     #include "wx/memory.h"
  26     #include "wx/font.h"
  27 #endif
  28
  29 #include "wx/file.h"
  30 #include "wx/filename.h"
  31 #include "wx/thread.h"
  32
  33 #ifdef __WXGPE__
  34     #include <gpe/init.h>
  35 #endif
  36
  37 #ifdef __WXUNIVERSAL__
  38     #include "wx/univ/theme.h"
  39     #include "wx/univ/renderer.h"
  40 #endif
  41
  42 #include <unistd.h>
  43
  44 #ifdef HAVE_POLL
  45     #if defined(__VMS)
  46         #include <poll.h>
  47     #else
  48         // bug in the OpenBSD headers: at least in 3.1 there is no extern "C"
  49         // in neither poll.h nor sys/poll.h which results in link errors later
  50         #ifdef __OPENBSD__
  51             extern "C"
  52             {
  53         #endif
  54
  55         #include <sys/poll.h>
  56
  57         #ifdef __OPENBSD__
  58             };
  59         #endif
  60     #endif // platform
  61 #else // !HAVE_POLL
  62     // we implement poll() ourselves using select() which is supposed exist in
  63     // all modern Unices
  64     #include <sys/types.h>
  65     #include <sys/time.h>
  66     #include <unistd.h>
  67     #ifdef HAVE_SYS_SELECT_H
  68         #include <sys/select.h>
  69     #endif
  70 #endif // HAVE_POLL/!HAVE_POLL
  71
  72 #include "wx/unix/private.h"
  73 #include "wx/gtk/win_gtk.h"
  74 #include "wx/gtk/private.h"
  75
  76 #include <gdk/gdkx.h>
  77
  78 //-----------------------------------------------------------------------------
  79 // link GnomeVFS
  80 //-----------------------------------------------------------------------------
  81
  82 #if wxUSE_LIBGNOMEVFS
  83 #include "wx/html/forcelnk.h"
  84 FORCE_LINK(gnome_vfs)
  85 #endif
  86
  87 //-----------------------------------------------------------------------------
  88 // global data
  89 //-----------------------------------------------------------------------------
  90
  91 bool   g_mainThreadLocked = false;
  92
  93 static GtkWidget *gs_RootWindow = (GtkWidget*) NULL;
  94
  95 //-----------------------------------------------------------------------------
  96 // idle system
  97 //-----------------------------------------------------------------------------
  98
  99 void wxapp_install_idle_handler();
 100
 101 #if wxUSE_THREADS
 102 static wxMutex gs_idleTagsMutex;
 103 #endif
 104
 105 //-----------------------------------------------------------------------------
 106 // wxYield
 107 //-----------------------------------------------------------------------------
 108
 109 // not static because used by textctrl.cpp
 110 //
 111 // MT-FIXME
 112 bool wxIsInsideYield = false;
 113
 114 bool wxApp::Yield(bool onlyIfNeeded)
 115 {
 116     if ( wxIsInsideYield )
 117     {
 118         if ( !onlyIfNeeded )
 119         {
 120             wxFAIL_MSG( wxT("wxYield called recursively" ) );
 121         }
 122
 123         return false;
 124     }
 125
 126 #if wxUSE_THREADS
 127     if ( !wxThread::IsMain() )
 128     {
 129         // can't call gtk_main_iteration() from other threads like this
 130         return true;
 131     }
 132 #endif // wxUSE_THREADS
 133
 134     wxIsInsideYield = true;
 135
 136     // We need to remove idle callbacks or the loop will
 137     // never finish.
 138     wxTheApp->RemoveIdleTag();
 139
 140 #if wxUSE_LOG
 141     // disable log flushing from here because a call to wxYield() shouldn't
 142     // normally result in message boxes popping up &c
 143     wxLog::Suspend();
 144 #endif
 145
 146     while (gtk_events_pending())
 147         gtk_main_iteration();
 148
 149     // It's necessary to call ProcessIdle() to update the frames sizes which
 150     // might have been changed (it also will update other things set from
 151     // OnUpdateUI() which is a nice (and desired) side effect). But we
 152     // call ProcessIdle() only once since this is not meant for longish
 153     // background jobs (controlled by wxIdleEvent::RequestMore() and the
 154     // return value of Processidle().
 155     ProcessIdle();
 156
 157 #if wxUSE_LOG
 158     // let the logs be flashed again
 159     wxLog::Resume();
 160 #endif
 161
 162     wxIsInsideYield = false;
 163
 164     return true;
 165 }
 166
 167 //-----------------------------------------------------------------------------
 168 // wxWakeUpIdle
 169 //-----------------------------------------------------------------------------
 170
 171 // RR/KH: No wxMutexGui calls are needed here according to the GTK faq,
 172 // http://www.gtk.org/faq/#AEN500 - this caused problems for wxPostEvent.
 173
 174 void wxApp::WakeUpIdle()
 175 {
 176     wxapp_install_idle_handler();
 177 }
 178
 179 //-----------------------------------------------------------------------------
 180 // local functions
 181 //-----------------------------------------------------------------------------
 182
 183 // the callback functions must be extern "C" to comply with GTK+ declarations
 184 extern "C"
 185 {
 186
 187 static gint wxapp_idle_callback( gpointer WXUNUSED(data) )
 188 {
 189     if (!wxTheApp)
 190         return false;
 191
 192 #ifdef __WXDEBUG__
 193     // don't generate the idle events while the assert modal dialog is shown,
 194     // this completely confuses the apps which don't expect to be reentered
 195     // from some safely-looking functions
 196     if ( wxTheApp->IsInAssert() )
 197         return false;
 198 #endif // __WXDEBUG__
 199
 200     // When getting called from GDK's time-out handler
 201     // we are no longer within GDK's grab on the GUI
 202     // thread so we must lock it here ourselves.
 203     gdk_threads_enter();
 204
 205     // Indicate that we are now in idle mode and event handlers
 206     // will have to reinstall the idle handler again.
 207     {
 208 #if wxUSE_THREADS
 209         wxMutexLocker lock(gs_idleTagsMutex);
 210 #endif
 211         g_isIdle = true;
 212         wxTheApp->m_idleTag = 0;
 213     }
 214
 215     bool moreIdles;
 216
 217     // Send idle event to all who request them as long as
 218     // no events have popped up in the event queue.
 219     while ( (moreIdles = wxTheApp->ProcessIdle()) && gtk_events_pending() == 0)
 220         ;
 221
 222     // Release lock again
 223     gdk_threads_leave();
 224
 225     // Return FALSE if no more idle events are to be sent
 226     return moreIdles;
 227 }
 228
 229 #if wxUSE_THREADS
 230
 231 #ifdef HAVE_POLL
 232     #define wxPoll poll
 233     #define wxPollFd pollfd
 234 #else // !HAVE_POLL
 235
 236 typedef GPollFD wxPollFd;
 237
 238 int wxPoll(wxPollFd *ufds, unsigned int nfds, int timeout)
 239 {
 240     // convert timeout from ms to struct timeval (s/us)
 241     timeval tv_timeout;
 242     tv_timeout.tv_sec = timeout/1000;
 243     tv_timeout.tv_usec = (timeout%1000)*1000;
 244
 245     // remember the highest fd used here
 246     int fdMax = -1;
 247
 248     // and fill the sets for select()
 249     fd_set readfds;
 250     fd_set writefds;
 251     fd_set exceptfds;
 252     wxFD_ZERO(&readfds);
 253     wxFD_ZERO(&writefds);
 254     wxFD_ZERO(&exceptfds);
 255
 256     unsigned int i;
 257     for ( i = 0; i < nfds; i++ )
 258     {
 259         wxASSERT_MSG( ufds[i].fd < wxFD_SETSIZE, _T("fd out of range") );
 260
 261         if ( ufds[i].events & G_IO_IN )
 262             wxFD_SET(ufds[i].fd, &readfds);
 263
 264         if ( ufds[i].events & G_IO_PRI )
 265             wxFD_SET(ufds[i].fd, &exceptfds);
 266
 267         if ( ufds[i].events & G_IO_OUT )
 268             wxFD_SET(ufds[i].fd, &writefds);
 269
 270         if ( ufds[i].fd > fdMax )
 271             fdMax = ufds[i].fd;
 272     }
 273
 274     fdMax++;
 275     int res = select(fdMax, &readfds, &writefds, &exceptfds, &tv_timeout);
 276
 277     // translate the results back
 278     for ( i = 0; i < nfds; i++ )
 279     {
 280         ufds[i].revents = 0;
 281
 282         if ( wxFD_ISSET(ufds[i].fd, &readfds ) )
 283             ufds[i].revents |= G_IO_IN;
 284
 285         if ( wxFD_ISSET(ufds[i].fd, &exceptfds ) )
 286             ufds[i].revents |= G_IO_PRI;
 287
 288         if ( wxFD_ISSET(ufds[i].fd, &writefds ) )
 289             ufds[i].revents |= G_IO_OUT;
 290     }
 291
 292     return res;
 293 }
 294
 295 #endif // HAVE_POLL/!HAVE_POLL
 296
 297 static gint wxapp_poll_func( GPollFD *ufds, guint nfds, gint timeout )
 298 {
 299     gdk_threads_enter();
 300
 301     wxMutexGuiLeave();
 302     g_mainThreadLocked = true;
 303
 304     // we rely on the fact that glib GPollFD struct is really just pollfd but
 305     // I wonder how wise is this in the long term (VZ)
 306     gint res = wxPoll( (wxPollFd *) ufds, nfds, timeout );
 307
 308     wxMutexGuiEnter();
 309     g_mainThreadLocked = false;
 310
 311     gdk_threads_leave();
 312
 313     return res;
 314 }
 315
 316 #endif // wxUSE_THREADS
 317
 318 } // extern "C"
 319
 320 void wxapp_install_idle_handler()
 321 {
 322 #if wxUSE_THREADS
 323     wxMutexLocker lock(gs_idleTagsMutex);
 324 #endif
 325
 326     // Don't install the handler if it's already installed. This test *MUST*
 327     // be done when gs_idleTagsMutex is locked!
 328     if (!g_isIdle)
 329         return;
 330
 331     // GD: this assert is raised when using the thread sample (which works)
 332     //     so the test is probably not so easy. Can widget callbacks be
 333     //     triggered from child threads and, if so, for which widgets?
 334     // wxASSERT_MSG( wxThread::IsMain() || gs_WakeUpIdle, wxT("attempt to install idle handler from widget callback in child thread (should be exclusively from wxWakeUpIdle)") );
 335
 336     wxASSERT_MSG( wxTheApp->m_idleTag == 0, wxT("attempt to install idle handler twice") );
 337
 338     g_isIdle = false;
 339
 340     // This routine gets called by all event handlers
 341     // indicating that the idle is over. It may also
 342     // get called from other thread for sending events
 343     // to the main thread (and processing these in
 344     // idle time). Very low priority.
 345     wxTheApp->m_idleTag = g_idle_add_full(G_PRIORITY_LOW, wxapp_idle_callback, NULL, NULL);
 346 }
 347
 348 //-----------------------------------------------------------------------------
 349 // Access to the root window global
 350 //-----------------------------------------------------------------------------
 351
 352 GtkWidget* wxGetRootWindow()
 353 {
 354     if (gs_RootWindow == NULL)
 355     {
 356         gs_RootWindow = gtk_window_new( GTK_WINDOW_TOPLEVEL );
 357         gtk_widget_realize( gs_RootWindow );
 358     }
 359     return gs_RootWindow;
 360 }
 361
 362 //-----------------------------------------------------------------------------
 363 // wxApp
 364 //-----------------------------------------------------------------------------
 365
 366 IMPLEMENT_DYNAMIC_CLASS(wxApp,wxEvtHandler)
 367
 368 BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
 369     EVT_IDLE(wxAppBase::OnIdle)
 370 END_EVENT_TABLE()
 371
 372 wxApp::wxApp()
 373 {
 374 #ifdef __WXDEBUG__
 375     m_isInAssert = false;
 376 #endif // __WXDEBUG__
 377
 378     m_idleTag = 0;
 379     g_isIdle = true;
 380     wxapp_install_idle_handler();
 381
 382 #if wxUSE_THREADS
 383     g_main_context_set_poll_func( NULL, wxapp_poll_func );
 384 #endif
 385
 386     // this is NULL for a "regular" wxApp, but is set (and freed) by a wxGLApp
 387     m_glVisualInfo = (void *) NULL;
 388     m_glFBCInfo = (void *) NULL;
 389 }
 390
 391 wxApp::~wxApp()
 392 {
 393     if (m_idleTag)
 394         g_source_remove( m_idleTag );
 395 }
 396
 397 bool wxApp::OnInitGui()
 398 {
 399     if ( !wxAppBase::OnInitGui() )
 400         return false;
 401
 402     // if this is a wxGLApp (derived from wxApp), and we've already
 403     // chosen a specific visual, then derive the GdkVisual from that
 404     if (m_glVisualInfo != NULL)
 405     {
 406         // seems gtk_widget_set_default_visual no longer exists?
 407         GdkVisual* vis = gtk_widget_get_default_visual();
 408
 409         GdkColormap *colormap = gdk_colormap_new( vis, FALSE );
 410         gtk_widget_set_default_colormap( colormap );
 411     }
 412
 413     // On some machines, the default visual is just 256 colours, so
 414     // we make sure we get the best. This can sometimes be wasteful.
 415
 416     else
 417     if ((gdk_visual_get_best() != gdk_visual_get_system()) && (m_useBestVisual))
 418     {
 419         /* seems gtk_widget_set_default_visual no longer exists? */
 420         GdkVisual* vis = gtk_widget_get_default_visual();
 421
 422         GdkColormap *colormap = gdk_colormap_new( vis, FALSE );
 423         gtk_widget_set_default_colormap( colormap );
 424     }
 425
 426     return true;
 427 }
 428
 429 GdkVisual *wxApp::GetGdkVisual()
 430 {
 431     GdkVisual *visual = NULL;
 432
 433     if (m_glVisualInfo)
 434         visual = gdkx_visual_get( ((XVisualInfo *) m_glVisualInfo)->visualid );
 435     else
 436         visual = gdk_drawable_get_visual( wxGetRootWindow()->window );
 437
 438     wxASSERT( visual );
 439
 440     return visual;
 441 }
 442
 443 bool wxApp::Initialize(int& argc, wxChar **argv)
 444 {
 445     bool init_result;
 446
 447 #if wxUSE_THREADS
 448     if (!g_thread_supported())
 449         g_thread_init(NULL);
 450 #endif // wxUSE_THREADS
 451
 452     gtk_set_locale();
 453
 454     // We should have the wxUSE_WCHAR_T test on the _outside_
 455 #if wxUSE_WCHAR_T
 456     // gtk+ 2.0 supports Unicode through UTF-8 strings
 457     wxConvCurrent = &wxConvUTF8;
 458 #else // !wxUSE_WCHAR_T
 459     if (!wxOKlibc())
 460         wxConvCurrent = (wxMBConv*) NULL;
 461 #endif // wxUSE_WCHAR_T/!wxUSE_WCHAR_T
 462
 463     // decide which conversion to use for the file names
 464
 465     // (1) this variable exists for the sole purpose of specifying the encoding
 466     //     of the filenames for GTK+ programs, so use it if it is set
 467     wxString encName(wxGetenv(_T("G_FILENAME_ENCODING")));
 468     encName = encName.BeforeFirst(_T(','));
 469     if (encName == _T("@locale"))
 470         encName.clear();
 471     encName.MakeUpper();
 472 #if wxUSE_INTL
 473     if (encName.empty())
 474     {
 475         // (2) if a non default locale is set, assume that the user wants his
 476         //     filenames in this locale too
 477         encName = wxLocale::GetSystemEncodingName().Upper();
 478         // (3) finally use UTF-8 by default
 479         if (encName.empty() || encName == _T("US-ASCII"))
 480             encName = _T("UTF-8");
 481         wxSetEnv(_T("G_FILENAME_ENCODING"), encName);
 482     }
 483 #else
 484     if (encName.empty())
 485         encName = _T("UTF-8");
 486 #endif // wxUSE_INTL
 487     static wxConvBrokenFileNames fileconv(encName);
 488     wxConvFileName = &fileconv;
 489
 490 #if wxUSE_UNICODE
 491     // gtk_init() wants UTF-8, not wchar_t, so convert
 492     int i;
 493     char **argvGTK = new char *[argc + 1];
 494     for ( i = 0; i < argc; i++ )
 495     {
 496         argvGTK[i] = wxStrdupA(wxConvUTF8.cWX2MB(argv[i]));
 497     }
 498
 499     argvGTK[argc] = NULL;
 500
 501     int argcGTK = argc;
 502
 503 #ifdef __WXGPE__
 504     init_result = true;  // is there a _check() version of this?
 505     gpe_application_init( &argcGTK, &argvGTK );
 506 #else
 507     init_result = gtk_init_check( &argcGTK, &argvGTK );
 508 #endif
 509
 510     if ( argcGTK != argc )
 511     {
 512         // we have to drop the parameters which were consumed by GTK+
 513         for ( i = 0; i < argcGTK; i++ )
 514         {
 515             while ( strcmp(wxConvUTF8.cWX2MB(argv[i]), argvGTK[i]) != 0 )
 516             {
 517                 memmove(argv + i, argv + i + 1, argc - i);
 518             }
 519         }
 520
 521         argc = argcGTK;
 522     }
 523     //else: gtk_init() didn't modify our parameters
 524
 525     // free our copy
 526     for ( i = 0; i < argcGTK; i++ )
 527     {
 528         free(argvGTK[i]);
 529     }
 530
 531     delete [] argvGTK;
 532 #else // !wxUSE_UNICODE
 533     // gtk_init() shouldn't actually change argv itself (just its contents) so
 534     // it's ok to pass pointer to it
 535     init_result = gtk_init_check( &argc, &argv );
 536 #endif // wxUSE_UNICODE/!wxUSE_UNICODE
 537
 538     if (!init_result) {
 539         wxLogError(wxT("Unable to initialize gtk, is DISPLAY set properly?"));
 540         return false;
 541     }
 542
 543     // we can not enter threads before gtk_init is done
 544     gdk_threads_enter();
 545
 546     if ( !wxAppBase::Initialize(argc, argv) )
 547     {
 548         gdk_threads_leave();
 549
 550         return false;
 551     }
 552
 553     wxSetDetectableAutoRepeat( true );
 554
 555 #if wxUSE_INTL
 556     wxFont::SetDefaultEncoding(wxLocale::GetSystemEncoding());
 557 #endif
 558
 559     return true;
 560 }
 561
 562 void wxApp::CleanUp()
 563 {
 564     gdk_threads_leave();
 565
 566     wxAppBase::CleanUp();
 567 }
 568
 569 #ifdef __WXDEBUG__
 570
 571 void wxApp::OnAssertFailure(const wxChar *file,
 572                             int line,
 573                             const wxChar* func,
 574                             const wxChar* cond,
 575                             const wxChar *msg)
 576 {
 577     m_isInAssert = true;
 578
 579     wxAppBase::OnAssertFailure(file, line, func, cond, msg);
 580
 581     m_isInAssert = false;
 582 }
 583
 584 #endif // __WXDEBUG__
 585
 586 void wxApp::RemoveIdleTag()
 587 {
 588 #if wxUSE_THREADS
 589     wxMutexLocker lock(gs_idleTagsMutex);
 590 #endif
 591     if (!g_isIdle)
 592     {
 593         g_source_remove( wxTheApp->m_idleTag );
 594         wxTheApp->m_idleTag = 0;
 595         g_isIdle = true;
 596     }
 597 }