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/dialog.h"
  26     #include "wx/settings.h"
  27     #include "wx/msgdlg.h"
  28     #include "wx/memory.h"
  29     #include "wx/font.h"
  30     #include "wx/gdicmn.h"
  31     #include "wx/image.h"
  32 #endif
  33
  34 #include "wx/file.h"
  35 #include "wx/filename.h"
  36 #include "wx/module.h"
  37 #include "wx/thread.h"
  38
  39 #ifdef __WXGPE__
  40     #include <gpe/init.h>
  41 #endif
  42
  43 #ifdef __WXUNIVERSAL__
  44     #include "wx/univ/theme.h"
  45     #include "wx/univ/renderer.h"
  46 #endif
  47
  48 #include <unistd.h>
  49
  50 #ifdef HAVE_POLL
  51     #if defined(__VMS)
  52         #include <poll.h>
  53     #else
  54         // bug in the OpenBSD headers: at least in 3.1 there is no extern "C"
  55         // in neither poll.h nor sys/poll.h which results in link errors later
  56         #ifdef __OPENBSD__
  57             extern "C"
  58             {
  59         #endif
  60
  61         #include <sys/poll.h>
  62
  63         #ifdef __OPENBSD__
  64             };
  65         #endif
  66     #endif // platform
  67 #else // !HAVE_POLL
  68     // we implement poll() ourselves using select() which is supposed exist in
  69     // all modern Unices
  70     #include <sys/types.h>
  71     #include <sys/time.h>
  72     #include <unistd.h>
  73     #ifdef HAVE_SYS_SELECT_H
  74         #include <sys/select.h>
  75     #endif
  76 #endif // HAVE_POLL/!HAVE_POLL
  77
  78 #include "wx/unix/private.h"
  79 #include "wx/gtk/win_gtk.h"
  80 #include "wx/gtk/private.h"
  81
  82 #include <gdk/gdkx.h>
  83
  84 //-----------------------------------------------------------------------------
  85 // link GnomeVFS
  86 //-----------------------------------------------------------------------------
  87
  88 #if wxUSE_LIBGNOMEVFS
  89 #include "wx/html/forcelnk.h"
  90 FORCE_LINK(gnome_vfs)
  91 #endif
  92
  93 //-----------------------------------------------------------------------------
  94 // global data
  95 //-----------------------------------------------------------------------------
  96
  97 bool   g_mainThreadLocked = false;
  98 gint   g_pendingTag = 0;
  99
 100 static GtkWidget *gs_RootWindow = (GtkWidget*) NULL;
 101
 102 //-----------------------------------------------------------------------------
 103 // idle system
 104 //-----------------------------------------------------------------------------
 105
 106 void wxapp_install_idle_handler();
 107
 108 #if wxUSE_THREADS
 109 static wxMutex gs_idleTagsMutex;
 110 #endif
 111
 112 //-----------------------------------------------------------------------------
 113 // wxYield
 114 //-----------------------------------------------------------------------------
 115
 116 // not static because used by textctrl.cpp
 117 //
 118 // MT-FIXME
 119 bool wxIsInsideYield = false;
 120
 121 bool wxApp::Yield(bool onlyIfNeeded)
 122 {
 123     if ( wxIsInsideYield )
 124     {
 125         if ( !onlyIfNeeded )
 126         {
 127             wxFAIL_MSG( wxT("wxYield called recursively" ) );
 128         }
 129
 130         return false;
 131     }
 132
 133 #if wxUSE_THREADS
 134     if ( !wxThread::IsMain() )
 135     {
 136         // can't call gtk_main_iteration() from other threads like this
 137         return true;
 138     }
 139 #endif // wxUSE_THREADS
 140
 141     wxIsInsideYield = true;
 142
 143     // We need to remove idle callbacks or the loop will
 144     // never finish.
 145     wxTheApp->RemoveIdleTag();
 146
 147 #if wxUSE_LOG
 148     // disable log flushing from here because a call to wxYield() shouldn't
 149     // normally result in message boxes popping up &c
 150     wxLog::Suspend();
 151 #endif
 152
 153     while (gtk_events_pending())
 154         gtk_main_iteration();
 155
 156     // It's necessary to call ProcessIdle() to update the frames sizes which
 157     // might have been changed (it also will update other things set from
 158     // OnUpdateUI() which is a nice (and desired) side effect). But we
 159     // call ProcessIdle() only once since this is not meant for longish
 160     // background jobs (controlled by wxIdleEvent::RequestMore() and the
 161     // return value of Processidle().
 162     ProcessIdle();
 163
 164 #if wxUSE_LOG
 165     // let the logs be flashed again
 166     wxLog::Resume();
 167 #endif
 168
 169     wxIsInsideYield = false;
 170
 171     return true;
 172 }
 173
 174 //-----------------------------------------------------------------------------
 175 // wxWakeUpIdle
 176 //-----------------------------------------------------------------------------
 177
 178 // RR/KH: No wxMutexGui calls are needed here according to the GTK faq,
 179 // http://www.gtk.org/faq/#AEN500 - this caused problems for wxPostEvent.
 180
 181 void wxApp::WakeUpIdle()
 182 {
 183     wxapp_install_idle_handler();
 184 }
 185
 186 //-----------------------------------------------------------------------------
 187 // local functions
 188 //-----------------------------------------------------------------------------
 189
 190 // the callback functions must be extern "C" to comply with GTK+ declarations
 191 extern "C"
 192 {
 193
 194 static gint wxapp_pending_callback( gpointer WXUNUSED(data) )
 195 {
 196     if (!wxTheApp) return TRUE;
 197
 198     // When getting called from GDK's time-out handler
 199     // we are no longer within GDK's grab on the GUI
 200     // thread so we must lock it here ourselves.
 201     gdk_threads_enter();
 202
 203     // Sent idle event to all who request them.
 204     wxTheApp->ProcessPendingEvents();
 205
 206     {
 207 #if wxUSE_THREADS
 208         wxMutexLocker lock(gs_idleTagsMutex);
 209 #endif
 210         g_pendingTag = 0;
 211     }
 212
 213     // Flush the logged messages if any.
 214 #if wxUSE_LOG
 215     wxLog::FlushActive();
 216 #endif // wxUSE_LOG
 217
 218     // Release lock again
 219     gdk_threads_leave();
 220
 221     // Return FALSE to indicate that no more idle events are
 222     // to be sent (single shot instead of continuous stream)
 223     return FALSE;
 224 }
 225
 226 static gint wxapp_idle_callback( gpointer WXUNUSED(data) )
 227 {
 228     if (!wxTheApp)
 229         return TRUE;
 230
 231 #ifdef __WXDEBUG__
 232     // don't generate the idle events while the assert modal dialog is shown,
 233     // this completely confuses the apps which don't expect to be reentered
 234     // from some safely-looking functions
 235     if ( wxTheApp->IsInAssert() )
 236     {
 237         // But repaint the assertion message if necessary
 238         if (wxTopLevelWindows.GetCount() > 0)
 239         {
 240             wxWindow* win = (wxWindow*) wxTopLevelWindows.GetLast()->GetData();
 241             if (win->IsKindOf(CLASSINFO(wxMessageDialog)))
 242                 win->OnInternalIdle();
 243         }
 244         return TRUE;
 245     }
 246 #endif // __WXDEBUG__
 247
 248     // When getting called from GDK's time-out handler
 249     // we are no longer within GDK's grab on the GUI
 250     // thread so we must lock it here ourselves.
 251     gdk_threads_enter();
 252
 253     // Indicate that we are now in idle mode and event handlers
 254     // will have to reinstall the idle handler again.
 255     {
 256 #if wxUSE_THREADS
 257         wxMutexLocker lock(gs_idleTagsMutex);
 258 #endif
 259         g_isIdle = true;
 260         wxTheApp->m_idleTag = 0;
 261     }
 262
 263     bool moreIdles;
 264
 265     // Send idle event to all who request them as long as
 266     // no events have popped up in the event queue.
 267     while ( (moreIdles = wxTheApp->ProcessIdle()) && gtk_events_pending() == 0)
 268         ;
 269
 270     // Release lock again
 271     gdk_threads_leave();
 272
 273     // Return FALSE if no more idle events are to be sent
 274     return moreIdles;
 275 }
 276
 277 #if wxUSE_THREADS
 278
 279 #ifdef HAVE_POLL
 280     #define wxPoll poll
 281     #define wxPollFd pollfd
 282 #else // !HAVE_POLL
 283
 284 typedef GPollFD wxPollFd;
 285
 286 int wxPoll(wxPollFd *ufds, unsigned int nfds, int timeout)
 287 {
 288     // convert timeout from ms to struct timeval (s/us)
 289     timeval tv_timeout;
 290     tv_timeout.tv_sec = timeout/1000;
 291     tv_timeout.tv_usec = (timeout%1000)*1000;
 292
 293     // remember the highest fd used here
 294     int fdMax = -1;
 295
 296     // and fill the sets for select()
 297     fd_set readfds;
 298     fd_set writefds;
 299     fd_set exceptfds;
 300     wxFD_ZERO(&readfds);
 301     wxFD_ZERO(&writefds);
 302     wxFD_ZERO(&exceptfds);
 303
 304     unsigned int i;
 305     for ( i = 0; i < nfds; i++ )
 306     {
 307         wxASSERT_MSG( ufds[i].fd < wxFD_SETSIZE, _T("fd out of range") );
 308
 309         if ( ufds[i].events & G_IO_IN )
 310             wxFD_SET(ufds[i].fd, &readfds);
 311
 312         if ( ufds[i].events & G_IO_PRI )
 313             wxFD_SET(ufds[i].fd, &exceptfds);
 314
 315         if ( ufds[i].events & G_IO_OUT )
 316             wxFD_SET(ufds[i].fd, &writefds);
 317
 318         if ( ufds[i].fd > fdMax )
 319             fdMax = ufds[i].fd;
 320     }
 321
 322     fdMax++;
 323     int res = select(fdMax, &readfds, &writefds, &exceptfds, &tv_timeout);
 324
 325     // translate the results back
 326     for ( i = 0; i < nfds; i++ )
 327     {
 328         ufds[i].revents = 0;
 329
 330         if ( wxFD_ISSET(ufds[i].fd, &readfds ) )
 331             ufds[i].revents |= G_IO_IN;
 332
 333         if ( wxFD_ISSET(ufds[i].fd, &exceptfds ) )
 334             ufds[i].revents |= G_IO_PRI;
 335
 336         if ( wxFD_ISSET(ufds[i].fd, &writefds ) )
 337             ufds[i].revents |= G_IO_OUT;
 338     }
 339
 340     return res;
 341 }
 342
 343 #endif // HAVE_POLL/!HAVE_POLL
 344
 345 static gint wxapp_poll_func( GPollFD *ufds, guint nfds, gint timeout )
 346 {
 347     gdk_threads_enter();
 348
 349     wxMutexGuiLeave();
 350     g_mainThreadLocked = true;
 351
 352     // we rely on the fact that glib GPollFD struct is really just pollfd but
 353     // I wonder how wise is this in the long term (VZ)
 354     gint res = wxPoll( (wxPollFd *) ufds, nfds, timeout );
 355
 356     wxMutexGuiEnter();
 357     g_mainThreadLocked = false;
 358
 359     gdk_threads_leave();
 360
 361     return res;
 362 }
 363
 364 #endif // wxUSE_THREADS
 365
 366 } // extern "C"
 367
 368 void wxapp_install_idle_handler()
 369 {
 370 #if wxUSE_THREADS
 371     wxMutexLocker lock(gs_idleTagsMutex);
 372 #endif
 373
 374     // Don't install the handler if it's already installed. This test *MUST*
 375     // be done when gs_idleTagsMutex is locked!
 376     if (!g_isIdle)
 377         return;
 378
 379     // GD: this assert is raised when using the thread sample (which works)
 380     //     so the test is probably not so easy. Can widget callbacks be
 381     //     triggered from child threads and, if so, for which widgets?
 382     // wxASSERT_MSG( wxThread::IsMain() || gs_WakeUpIdle, wxT("attempt to install idle handler from widget callback in child thread (should be exclusively from wxWakeUpIdle)") );
 383
 384     wxASSERT_MSG( wxTheApp->m_idleTag == 0, wxT("attempt to install idle handler twice") );
 385
 386     g_isIdle = false;
 387
 388     if (g_pendingTag == 0)
 389         g_pendingTag = g_idle_add_full( 900, wxapp_pending_callback, NULL, NULL );
 390
 391     // This routine gets called by all event handlers
 392     // indicating that the idle is over. It may also
 393     // get called from other thread for sending events
 394     // to the main thread (and processing these in
 395     // idle time). Very low priority.
 396     wxTheApp->m_idleTag = g_idle_add_full( 1000, wxapp_idle_callback, NULL, NULL );
 397 }
 398
 399 //-----------------------------------------------------------------------------
 400 // Access to the root window global
 401 //-----------------------------------------------------------------------------
 402
 403 GtkWidget* wxGetRootWindow()
 404 {
 405     if (gs_RootWindow == NULL)
 406     {
 407         gs_RootWindow = gtk_window_new( GTK_WINDOW_TOPLEVEL );
 408         gtk_widget_realize( gs_RootWindow );
 409     }
 410     return gs_RootWindow;
 411 }
 412
 413 //-----------------------------------------------------------------------------
 414 // wxApp
 415 //-----------------------------------------------------------------------------
 416
 417 IMPLEMENT_DYNAMIC_CLASS(wxApp,wxEvtHandler)
 418
 419 BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
 420     EVT_IDLE(wxAppBase::OnIdle)
 421 END_EVENT_TABLE()
 422
 423 wxApp::wxApp()
 424 {
 425 #ifdef __WXDEBUG__
 426     m_isInAssert = false;
 427 #endif // __WXDEBUG__
 428
 429     m_idleTag = 0;
 430     g_isIdle = true;
 431     wxapp_install_idle_handler();
 432
 433 #if wxUSE_THREADS
 434     g_main_context_set_poll_func( NULL, wxapp_poll_func );
 435 #endif
 436
 437     // this is NULL for a "regular" wxApp, but is set (and freed) by a wxGLApp
 438     m_glVisualInfo = (void *) NULL;
 439     m_glFBCInfo = (void *) NULL;
 440 }
 441
 442 wxApp::~wxApp()
 443 {
 444     if (m_idleTag)
 445         g_source_remove( m_idleTag );
 446 }
 447
 448 bool wxApp::OnInitGui()
 449 {
 450     if ( !wxAppBase::OnInitGui() )
 451         return false;
 452
 453     // if this is a wxGLApp (derived from wxApp), and we've already
 454     // chosen a specific visual, then derive the GdkVisual from that
 455     if (m_glVisualInfo != NULL)
 456     {
 457         // seems gtk_widget_set_default_visual no longer exists?
 458         GdkVisual* vis = gtk_widget_get_default_visual();
 459
 460         GdkColormap *colormap = gdk_colormap_new( vis, FALSE );
 461         gtk_widget_set_default_colormap( colormap );
 462     }
 463
 464     // On some machines, the default visual is just 256 colours, so
 465     // we make sure we get the best. This can sometimes be wasteful.
 466
 467     else
 468     if ((gdk_visual_get_best() != gdk_visual_get_system()) && (m_useBestVisual))
 469     {
 470         /* seems gtk_widget_set_default_visual no longer exists? */
 471         GdkVisual* vis = gtk_widget_get_default_visual();
 472
 473         GdkColormap *colormap = gdk_colormap_new( vis, FALSE );
 474         gtk_widget_set_default_colormap( colormap );
 475     }
 476
 477     return true;
 478 }
 479
 480 GdkVisual *wxApp::GetGdkVisual()
 481 {
 482     GdkVisual *visual = NULL;
 483
 484     if (m_glVisualInfo)
 485         visual = gdkx_visual_get( ((XVisualInfo *) m_glVisualInfo)->visualid );
 486     else
 487         visual = gdk_drawable_get_visual( wxGetRootWindow()->window );
 488
 489     wxASSERT( visual );
 490
 491     return visual;
 492 }
 493
 494 bool wxApp::Initialize(int& argc, wxChar **argv)
 495 {
 496     bool init_result;
 497
 498 #if wxUSE_THREADS
 499     if (!g_thread_supported())
 500         g_thread_init(NULL);
 501 #endif // wxUSE_THREADS
 502
 503     gtk_set_locale();
 504
 505     // We should have the wxUSE_WCHAR_T test on the _outside_
 506 #if wxUSE_WCHAR_T
 507     // gtk+ 2.0 supports Unicode through UTF-8 strings
 508     wxConvCurrent = &wxConvUTF8;
 509 #else // !wxUSE_WCHAR_T
 510     if (!wxOKlibc())
 511         wxConvCurrent = (wxMBConv*) NULL;
 512 #endif // wxUSE_WCHAR_T/!wxUSE_WCHAR_T
 513
 514     // decide which conversion to use for the file names
 515
 516     // (1) this variable exists for the sole purpose of specifying the encoding
 517     //     of the filenames for GTK+ programs, so use it if it is set
 518     wxString encName(wxGetenv(_T("G_FILENAME_ENCODING")));
 519     encName = encName.BeforeFirst(_T(','));
 520     if (encName == _T("@locale"))
 521         encName.clear();
 522     encName.MakeUpper();
 523 #if wxUSE_INTL
 524     if (encName.empty())
 525     {
 526         // (2) if a non default locale is set, assume that the user wants his
 527         //     filenames in this locale too
 528         encName = wxLocale::GetSystemEncodingName().Upper();
 529         // (3) finally use UTF-8 by default
 530         if (encName.empty() || encName == _T("US-ASCII"))
 531             encName = _T("UTF-8");
 532         wxSetEnv(_T("G_FILENAME_ENCODING"), encName);
 533     }
 534 #else
 535     if (encName.empty())
 536         encName = _T("UTF-8");
 537 #endif // wxUSE_INTL
 538     static wxConvBrokenFileNames fileconv(encName);
 539     wxConvFileName = &fileconv;
 540
 541 #if wxUSE_UNICODE
 542     // gtk_init() wants UTF-8, not wchar_t, so convert
 543     int i;
 544     char **argvGTK = new char *[argc + 1];
 545     for ( i = 0; i < argc; i++ )
 546     {
 547         argvGTK[i] = wxStrdupA(wxConvUTF8.cWX2MB(argv[i]));
 548     }
 549
 550     argvGTK[argc] = NULL;
 551
 552     int argcGTK = argc;
 553
 554 #ifdef __WXGPE__
 555     init_result = true;  // is there a _check() version of this?
 556     gpe_application_init( &argcGTK, &argvGTK );
 557 #else
 558     init_result = gtk_init_check( &argcGTK, &argvGTK );
 559 #endif
 560
 561     if ( argcGTK != argc )
 562     {
 563         // we have to drop the parameters which were consumed by GTK+
 564         for ( i = 0; i < argcGTK; i++ )
 565         {
 566             while ( strcmp(wxConvUTF8.cWX2MB(argv[i]), argvGTK[i]) != 0 )
 567             {
 568                 memmove(argv + i, argv + i + 1, argc - i);
 569             }
 570         }
 571
 572         argc = argcGTK;
 573     }
 574     //else: gtk_init() didn't modify our parameters
 575
 576     // free our copy
 577     for ( i = 0; i < argcGTK; i++ )
 578     {
 579         free(argvGTK[i]);
 580     }
 581
 582     delete [] argvGTK;
 583 #else // !wxUSE_UNICODE
 584     // gtk_init() shouldn't actually change argv itself (just its contents) so
 585     // it's ok to pass pointer to it
 586     init_result = gtk_init_check( &argc, &argv );
 587 #endif // wxUSE_UNICODE/!wxUSE_UNICODE
 588
 589     if (!init_result) {
 590         wxLogError(wxT("Unable to initialize gtk, is DISPLAY set properly?"));
 591         return false;
 592     }
 593
 594     // we can not enter threads before gtk_init is done
 595     gdk_threads_enter();
 596
 597     if ( !wxAppBase::Initialize(argc, argv) )
 598     {
 599         gdk_threads_leave();
 600
 601         return false;
 602     }
 603
 604     wxSetDetectableAutoRepeat( true );
 605
 606 #if wxUSE_INTL
 607     wxFont::SetDefaultEncoding(wxLocale::GetSystemEncoding());
 608 #endif
 609
 610     return true;
 611 }
 612
 613 void wxApp::CleanUp()
 614 {
 615     gdk_threads_leave();
 616
 617     wxAppBase::CleanUp();
 618 }
 619
 620 #ifdef __WXDEBUG__
 621
 622 void wxApp::OnAssert(const wxChar *file, int line, const wxChar* cond, const wxChar *msg)
 623 {
 624     m_isInAssert = true;
 625
 626     wxAppBase::OnAssert(file, line, cond, msg);
 627
 628     m_isInAssert = false;
 629 }
 630
 631 #endif // __WXDEBUG__
 632
 633 void wxApp::RemoveIdleTag()
 634 {
 635 #if wxUSE_THREADS
 636     wxMutexLocker lock(gs_idleTagsMutex);
 637 #endif
 638     if (!g_isIdle)
 639     {
 640         g_source_remove( wxTheApp->m_idleTag );
 641         wxTheApp->m_idleTag = 0;
 642         g_isIdle = true;
 643     }
 644 }