src/gtk/app.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        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 __GNUG__
  11     #pragma implementation "app.h"
  12 #endif
  13
  14 #ifdef __VMS
  15 #include <vms_jackets.h>
  16 #undef ConnectionNumber
  17 #endif
  18
  19 #include "wx/app.h"
  20 #include "wx/gdicmn.h"
  21 #include "wx/utils.h"
  22 #include "wx/intl.h"
  23 #include "wx/log.h"
  24 #include "wx/memory.h"
  25 #include "wx/font.h"
  26 #include "wx/settings.h"
  27 #include "wx/dialog.h"
  28 #include "wx/msgdlg.h"
  29 #include "wx/file.h"
  30 #include "wx/filename.h"
  31 #include "wx/module.h"
  32 #include "wx/image.h"
  33
  34 #ifdef __WXUNIVERSAL__
  35     #include "wx/univ/theme.h"
  36     #include "wx/univ/renderer.h"
  37 #endif
  38
  39 #if wxUSE_THREADS
  40     #include "wx/thread.h"
  41 #endif
  42
  43 #include <unistd.h>
  44
  45 #ifdef HAVE_POLL
  46     #if defined(__VMS)
  47         #include <poll.h>
  48     #else
  49         // bug in the OpenBSD headers: at least in 3.1 there is no extern "C"
  50         // in neither poll.h nor sys/poll.h which results in link errors later
  51         #ifdef __OPENBSD__
  52             extern "C"
  53             {
  54         #endif
  55
  56         #include <sys/poll.h>
  57
  58         #ifdef __OPENBSD__
  59             };
  60         #endif
  61     #endif // platform
  62 #else // !HAVE_POLL
  63     // we implement poll() ourselves using select() which is supposed exist in
  64     // all modern Unices
  65     #include <sys/types.h>
  66     #include <sys/time.h>
  67     #include <unistd.h>
  68 #endif // HAVE_POLL/!HAVE_POLL
  69
  70 #include "wx/gtk/win_gtk.h"
  71
  72 #include <gtk/gtk.h>
  73
  74
  75 //-----------------------------------------------------------------------------
  76 // global data
  77 //-----------------------------------------------------------------------------
  78
  79 bool   g_mainThreadLocked = FALSE;
  80 gint   g_pendingTag = 0;
  81
  82 static GtkWidget *gs_RootWindow = (GtkWidget*) NULL;
  83
  84 //-----------------------------------------------------------------------------
  85 // idle system
  86 //-----------------------------------------------------------------------------
  87
  88 extern bool g_isIdle;
  89
  90 void wxapp_install_idle_handler();
  91
  92 //-----------------------------------------------------------------------------
  93 // wxYield
  94 //-----------------------------------------------------------------------------
  95
  96 // not static because used by textctrl.cpp
  97 //
  98 // MT-FIXME
  99 bool wxIsInsideYield = FALSE;
 100
 101 bool wxApp::Yield(bool onlyIfNeeded)
 102 {
 103     if ( wxIsInsideYield )
 104     {
 105         if ( !onlyIfNeeded )
 106         {
 107             wxFAIL_MSG( wxT("wxYield called recursively" ) );
 108         }
 109
 110         return FALSE;
 111     }
 112
 113 #if wxUSE_THREADS
 114     if ( !wxThread::IsMain() )
 115     {
 116         // can't call gtk_main_iteration() from other threads like this
 117         return TRUE;
 118     }
 119 #endif // wxUSE_THREADS
 120
 121     wxIsInsideYield = TRUE;
 122
 123     if (!g_isIdle)
 124     {
 125         // We need to remove idle callbacks or the loop will
 126         // never finish.
 127         gtk_idle_remove( m_idleTag );
 128         m_idleTag = 0;
 129         g_isIdle = TRUE;
 130     }
 131
 132     // disable log flushing from here because a call to wxYield() shouldn't
 133     // normally result in message boxes popping up &c
 134     wxLog::Suspend();
 135
 136     while (gtk_events_pending())
 137         gtk_main_iteration();
 138
 139     // It's necessary to call ProcessIdle() to update the frames sizes which
 140     // might have been changed (it also will update other things set from
 141     // OnUpdateUI() which is a nice (and desired) side effect). But we
 142     // call ProcessIdle() only once since this is not meant for longish
 143     // background jobs (controlled by wxIdleEvent::RequestMore() and the
 144     // return value of Processidle().
 145     ProcessIdle();
 146
 147     // let the logs be flashed again
 148     wxLog::Resume();
 149
 150     wxIsInsideYield = FALSE;
 151
 152     return TRUE;
 153 }
 154
 155 //-----------------------------------------------------------------------------
 156 // wxWakeUpIdle
 157 //-----------------------------------------------------------------------------
 158
 159 void wxApp::WakeUpIdle()
 160 {
 161 #if wxUSE_THREADS
 162     if (!wxThread::IsMain())
 163         wxMutexGuiEnter();
 164 #endif
 165
 166     if (g_isIdle)
 167         wxapp_install_idle_handler();
 168
 169 #if wxUSE_THREADS
 170     if (!wxThread::IsMain())
 171         wxMutexGuiLeave();
 172 #endif
 173 }
 174
 175 //-----------------------------------------------------------------------------
 176 // local functions
 177 //-----------------------------------------------------------------------------
 178
 179 // the callback functions must be extern "C" to comply with GTK+ declarations
 180 extern "C"
 181 {
 182
 183 static gint wxapp_pending_callback( gpointer WXUNUSED(data) )
 184 {
 185     if (!wxTheApp) return TRUE;
 186
 187     // When getting called from GDK's time-out handler
 188     // we are no longer within GDK's grab on the GUI
 189     // thread so we must lock it here ourselves.
 190     gdk_threads_enter();
 191
 192     // Sent idle event to all who request them.
 193     wxTheApp->ProcessPendingEvents();
 194
 195     g_pendingTag = 0;
 196
 197     // Flush the logged messages if any.
 198 #if wxUSE_LOG
 199     wxLog::FlushActive();
 200 #endif // wxUSE_LOG
 201
 202     // Release lock again
 203     gdk_threads_leave();
 204
 205     // Return FALSE to indicate that no more idle events are
 206     // to be sent (single shot instead of continuous stream)
 207     return FALSE;
 208 }
 209
 210 static gint wxapp_idle_callback( gpointer WXUNUSED(data) )
 211 {
 212     if (!wxTheApp)
 213         return TRUE;
 214
 215 #ifdef __WXDEBUG__
 216     // don't generate the idle events while the assert modal dialog is shown,
 217     // this completely confuses the apps which don't expect to be reentered
 218     // from some safely-looking functions
 219     if ( wxTheApp->IsInAssert() )
 220     {
 221         // But repaint the assertion message if necessary
 222         if (wxTopLevelWindows.GetCount() > 0)
 223         {
 224             wxWindow* win = (wxWindow*) wxTopLevelWindows.GetLast()->GetData();
 225 #ifdef __WXGTK20__
 226             if (win->IsKindOf(CLASSINFO(wxMessageDialog)))
 227 #else
 228             if (win->IsKindOf(CLASSINFO(wxGenericMessageDialog)))
 229 #endif
 230                 win->OnInternalIdle();
 231         }
 232         return TRUE;
 233     }
 234 #endif // __WXDEBUG__
 235
 236     // When getting called from GDK's time-out handler
 237     // we are no longer within GDK's grab on the GUI
 238     // thread so we must lock it here ourselves.
 239     gdk_threads_enter();
 240
 241     // Indicate that we are now in idle mode and event handlers
 242     // will have to reinstall the idle handler again.
 243     g_isIdle = TRUE;
 244     wxTheApp->m_idleTag = 0;
 245
 246     // Send idle event to all who request them as long as
 247     // no events have popped up in the event queue.
 248     while (wxTheApp->ProcessIdle() && (gtk_events_pending() == 0))
 249         ;
 250
 251     // Release lock again
 252     gdk_threads_leave();
 253
 254     // Return FALSE to indicate that no more idle events are
 255     // to be sent (single shot instead of continuous stream).
 256     return FALSE;
 257 }
 258
 259 #if wxUSE_THREADS
 260
 261 #ifdef HAVE_POLL
 262     #define wxPoll poll
 263     #define wxPollFd pollfd
 264 #else // !HAVE_POLL
 265
 266 typedef GPollFD wxPollFd;
 267
 268 int wxPoll(wxPollFd *ufds, unsigned int nfds, int timeout)
 269 {
 270     // convert timeout from ms to struct timeval (s/us)
 271     timeval tv_timeout;
 272     tv_timeout.tv_sec = timeout/1000;
 273     tv_timeout.tv_usec = (timeout%1000)*1000;
 274
 275     // remember the highest fd used here
 276     int fdMax = -1;
 277
 278     // and fill the sets for select()
 279     fd_set readfds;
 280     fd_set writefds;
 281     fd_set exceptfds;
 282     FD_ZERO(&readfds);
 283     FD_ZERO(&writefds);
 284     FD_ZERO(&exceptfds);
 285
 286     unsigned int i;
 287     for ( i = 0; i < nfds; i++ )
 288     {
 289         wxASSERT_MSG( ufds[i].fd < FD_SETSIZE, _T("fd out of range") );
 290
 291         if ( ufds[i].events & G_IO_IN )
 292             FD_SET(ufds[i].fd, &readfds);
 293
 294         if ( ufds[i].events & G_IO_PRI )
 295             FD_SET(ufds[i].fd, &exceptfds);
 296
 297         if ( ufds[i].events & G_IO_OUT )
 298             FD_SET(ufds[i].fd, &writefds);
 299
 300         if ( ufds[i].fd > fdMax )
 301             fdMax = ufds[i].fd;
 302     }
 303
 304     fdMax++;
 305     int res = select(fdMax, &readfds, &writefds, &exceptfds, &tv_timeout);
 306
 307     // translate the results back
 308     for ( i = 0; i < nfds; i++ )
 309     {
 310         ufds[i].revents = 0;
 311
 312         if ( FD_ISSET(ufds[i].fd, &readfds ) )
 313             ufds[i].revents |= G_IO_IN;
 314
 315         if ( FD_ISSET(ufds[i].fd, &exceptfds ) )
 316             ufds[i].revents |= G_IO_PRI;
 317
 318         if ( FD_ISSET(ufds[i].fd, &writefds ) )
 319             ufds[i].revents |= G_IO_OUT;
 320     }
 321
 322     return res;
 323 }
 324
 325 #endif // HAVE_POLL/!HAVE_POLL
 326
 327 static gint wxapp_poll_func( GPollFD *ufds, guint nfds, gint timeout )
 328 {
 329     gdk_threads_enter();
 330
 331     wxMutexGuiLeave();
 332     g_mainThreadLocked = TRUE;
 333
 334     // we rely on the fact that glib GPollFD struct is really just pollfd but
 335     // I wonder how wise is this in the long term (VZ)
 336     gint res = wxPoll( (wxPollFd *) ufds, nfds, timeout );
 337
 338     wxMutexGuiEnter();
 339     g_mainThreadLocked = FALSE;
 340
 341     gdk_threads_leave();
 342
 343     return res;
 344 }
 345
 346 #endif // wxUSE_THREADS
 347
 348 } // extern "C"
 349
 350 void wxapp_install_idle_handler()
 351 {
 352     // GD: this assert is raised when using the thread sample (which works)
 353     //     so the test is probably not so easy. Can widget callbacks be
 354     //     triggered from child threads and, if so, for which widgets?
 355     // wxASSERT_MSG( wxThread::IsMain() || gs_WakeUpIdle, wxT("attempt to install idle handler from widget callback in child thread (should be exclusively from wxWakeUpIdle)") );
 356
 357     wxASSERT_MSG( wxTheApp->m_idleTag == 0, wxT("attempt to install idle handler twice") );
 358
 359     g_isIdle = FALSE;
 360
 361     if (g_pendingTag == 0)
 362         g_pendingTag = gtk_idle_add_priority( 900, wxapp_pending_callback, (gpointer) NULL );
 363
 364     // This routine gets called by all event handlers
 365     // indicating that the idle is over. It may also
 366     // get called from other thread for sending events
 367     // to the main thread (and processing these in
 368     // idle time). Very low priority.
 369     wxTheApp->m_idleTag = gtk_idle_add_priority( 1000, wxapp_idle_callback, (gpointer) NULL );
 370 }
 371
 372 //-----------------------------------------------------------------------------
 373 // Access to the root window global
 374 //-----------------------------------------------------------------------------
 375
 376 GtkWidget* wxGetRootWindow()
 377 {
 378     if (gs_RootWindow == NULL)
 379     {
 380         gs_RootWindow = gtk_window_new( GTK_WINDOW_TOPLEVEL );
 381         gtk_widget_realize( gs_RootWindow );
 382     }
 383     return gs_RootWindow;
 384 }
 385
 386 //-----------------------------------------------------------------------------
 387 // wxApp
 388 //-----------------------------------------------------------------------------
 389
 390 IMPLEMENT_DYNAMIC_CLASS(wxApp,wxEvtHandler)
 391
 392 BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
 393     EVT_IDLE(wxAppBase::OnIdle)
 394 END_EVENT_TABLE()
 395
 396 wxApp::wxApp()
 397 {
 398     m_initialized = FALSE;
 399 #ifdef __WXDEBUG__
 400     m_isInAssert = FALSE;
 401 #endif // __WXDEBUG__
 402
 403     m_idleTag = 0;
 404     wxapp_install_idle_handler();
 405
 406 #if wxUSE_THREADS
 407     g_main_set_poll_func( wxapp_poll_func );
 408 #endif
 409
 410     m_colorCube = (unsigned char*) NULL;
 411
 412     // this is NULL for a "regular" wxApp, but is set (and freed) by a wxGLApp
 413     m_glVisualInfo = (void *) NULL;
 414 }
 415
 416 wxApp::~wxApp()
 417 {
 418     if (m_idleTag) gtk_idle_remove( m_idleTag );
 419
 420     if (m_colorCube) free(m_colorCube);
 421 }
 422
 423 bool wxApp::OnInitGui()
 424 {
 425     if ( !wxAppBase::OnInitGui() )
 426         return FALSE;
 427
 428     GdkVisual *visual = gdk_visual_get_system();
 429
 430     // if this is a wxGLApp (derived from wxApp), and we've already
 431     // chosen a specific visual, then derive the GdkVisual from that
 432     if (m_glVisualInfo != NULL)
 433     {
 434 #ifdef __WXGTK20__
 435         // seems gtk_widget_set_default_visual no longer exists?
 436         GdkVisual* vis = gtk_widget_get_default_visual();
 437 #else
 438         GdkVisual* vis = gdkx_visual_get(
 439             ((XVisualInfo *) m_glVisualInfo) ->visualid );
 440         gtk_widget_set_default_visual( vis );
 441 #endif
 442
 443         GdkColormap *colormap = gdk_colormap_new( vis, FALSE );
 444         gtk_widget_set_default_colormap( colormap );
 445
 446         visual = vis;
 447     }
 448
 449     // On some machines, the default visual is just 256 colours, so
 450     // we make sure we get the best. This can sometimes be wasteful.
 451
 452     else
 453     if ((gdk_visual_get_best() != gdk_visual_get_system()) && (m_useBestVisual))
 454     {
 455 #ifdef __WXGTK20__
 456         /* seems gtk_widget_set_default_visual no longer exists? */
 457         GdkVisual* vis = gtk_widget_get_default_visual();
 458 #else
 459         GdkVisual* vis = gdk_visual_get_best();
 460         gtk_widget_set_default_visual( vis );
 461 #endif
 462
 463         GdkColormap *colormap = gdk_colormap_new( vis, FALSE );
 464         gtk_widget_set_default_colormap( colormap );
 465
 466         visual = vis;
 467     }
 468
 469     // Nothing to do for 15, 16, 24, 32 bit displays
 470     if (visual->depth > 8) return TRUE;
 471
 472     // initialize color cube for 8-bit color reduction dithering
 473
 474     GdkColormap *cmap = gtk_widget_get_default_colormap();
 475
 476     m_colorCube = (unsigned char*)malloc(32 * 32 * 32);
 477
 478     for (int r = 0; r < 32; r++)
 479     {
 480         for (int g = 0; g < 32; g++)
 481         {
 482             for (int b = 0; b < 32; b++)
 483             {
 484                 int rr = (r << 3) | (r >> 2);
 485                 int gg = (g << 3) | (g >> 2);
 486                 int bb = (b << 3) | (b >> 2);
 487
 488                 int index = -1;
 489
 490                 GdkColor *colors = cmap->colors;
 491                 if (colors)
 492                 {
 493                     int max = 3 * 65536;
 494
 495                     for (int i = 0; i < cmap->size; i++)
 496                     {
 497                         int rdiff = ((rr << 8) - colors[i].red);
 498                         int gdiff = ((gg << 8) - colors[i].green);
 499                         int bdiff = ((bb << 8) - colors[i].blue);
 500                         int sum = ABS (rdiff) + ABS (gdiff) + ABS (bdiff);
 501                         if (sum < max)
 502                         {
 503                             index = i; max = sum;
 504                         }
 505                     }
 506                 }
 507                 else
 508                 {
 509                     // assume 8-bit true or static colors. this really exists
 510                     GdkVisual* vis = gdk_colormap_get_visual( cmap );
 511                     index = (r >> (5 - vis->red_prec)) << vis->red_shift;
 512                     index |= (g >> (5 - vis->green_prec)) << vis->green_shift;
 513                     index |= (b >> (5 - vis->blue_prec)) << vis->blue_shift;
 514                 }
 515                 m_colorCube[ (r*1024) + (g*32) + b ] = index;
 516             }
 517         }
 518     }
 519
 520     return TRUE;
 521 }
 522
 523 GdkVisual *wxApp::GetGdkVisual()
 524 {
 525     GdkVisual *visual = NULL;
 526
 527     if (m_glVisualInfo)
 528         visual = gdkx_visual_get( ((XVisualInfo *) m_glVisualInfo)->visualid );
 529     else
 530         visual = gdk_window_get_visual( wxGetRootWindow()->window );
 531
 532     wxASSERT( visual );
 533
 534     return visual;
 535 }
 536
 537 int wxApp::MainLoop()
 538 {
 539     gtk_main();
 540     return 0;
 541 }
 542
 543 void wxApp::Exit()
 544 {
 545     // VZ: no idea why is it different from ExitMainLoop() but this is what
 546     //     wxExit() used to do
 547     gtk_main_quit();
 548 }
 549
 550 void wxApp::ExitMainLoop()
 551 {
 552     if (gtk_main_level() > 0)
 553         gtk_main_quit();
 554 }
 555
 556 bool wxApp::Initialized()
 557 {
 558     return m_initialized;
 559 }
 560
 561 bool wxApp::Pending()
 562 {
 563     return (gtk_events_pending() > 0);
 564 }
 565
 566 void wxApp::Dispatch()
 567 {
 568     gtk_main_iteration();
 569 }
 570
 571 bool wxApp::Initialize(int& argc, wxChar **argv)
 572 {
 573 #if wxUSE_THREADS
 574     // GTK 1.2 up to version 1.2.3 has broken threads
 575     if ((gtk_major_version == 1) &&
 576         (gtk_minor_version == 2) &&
 577         (gtk_micro_version < 4))
 578     {
 579         printf( "wxWindows warning: GUI threading disabled due to outdated GTK version\n" );
 580     }
 581     else
 582     {
 583         g_thread_init(NULL);
 584     }
 585 #endif // wxUSE_THREADS
 586
 587     gtk_set_locale();
 588
 589     // We should have the wxUSE_WCHAR_T test on the _outside_
 590 #if wxUSE_WCHAR_T
 591     #if defined(__WXGTK20__)
 592         // gtk+ 2.0 supports Unicode through UTF-8 strings
 593         wxConvCurrent = &wxConvUTF8;
 594     #else // GTK 1.x
 595         if (!wxOKlibc())
 596             wxConvCurrent = &wxConvLocal;
 597     #endif
 598 #else // !wxUSE_WCHAR_T
 599     if (!wxOKlibc())
 600         wxConvCurrent = (wxMBConv*) NULL;
 601 #endif // wxUSE_WCHAR_T/!wxUSE_WCHAR_T
 602
 603 #if wxUSE_UNICODE
 604     // gtk_init() wants UTF-8, not wchar_t, so convert
 605     int i;
 606     char **argvGTK = new char *[argc + 1];
 607     for ( i = 0; i < argc; i++ )
 608     {
 609         argvGTK[i] = wxStrdupA(wxConvUTF8.cWX2MB(argv[i]));
 610     }
 611
 612     argvGTK[argc] = NULL;
 613
 614     int argcGTK = argc;
 615     gtk_init( &argcGTK, &argvGTK );
 616
 617     if ( argcGTK != argc )
 618     {
 619         // we have to drop the parameters which were consumed by GTK+
 620         for ( i = 0; i < argcGTK; i++ )
 621         {
 622             while ( strcmp(wxConvUTF8.cWX2MB(argv[i]), argvGTK[i]) != 0 )
 623             {
 624                 memmove(argv + i, argv + i + 1, argc - i);
 625             }
 626         }
 627
 628         argc = argcGTK;
 629     }
 630     //else: gtk_init() didn't modify our parameters
 631
 632     // free our copy
 633     for ( i = 0; i < argcGTK; i++ )
 634     {
 635         free(argvGTK[i]);
 636     }
 637
 638     delete [] argvGTK;
 639 #else // !wxUSE_UNICODE
 640     // gtk_init() shouldn't actually change argv itself (just its contents) so
 641     // it's ok to pass pointer to it
 642     gtk_init( &argc, &argv );
 643 #endif // wxUSE_UNICODE/!wxUSE_UNICODE
 644
 645     // we can not enter threads before gtk_init is done
 646     gdk_threads_enter();
 647
 648     if ( !wxAppBase::Initialize(argc, argv) )
 649     {
 650         gdk_threads_leave();
 651
 652         return false;
 653     }
 654
 655     wxSetDetectableAutoRepeat( TRUE );
 656
 657 #if wxUSE_INTL
 658     wxFont::SetDefaultEncoding(wxLocale::GetSystemEncoding());
 659 #endif
 660
 661     wxGetRootWindow();
 662
 663     return true;
 664 }
 665
 666 void wxApp::CleanUp()
 667 {
 668     gdk_threads_leave();
 669
 670     wxAppBase::CleanUp();
 671 }
 672
 673 #ifdef __WXDEBUG__
 674
 675 void wxApp::OnAssert(const wxChar *file, int line, const wxChar* cond, const wxChar *msg)
 676 {
 677     m_isInAssert = TRUE;
 678
 679     wxAppBase::OnAssert(file, line, cond, msg);
 680
 681     m_isInAssert = FALSE;
 682 }
 683
 684 #endif // __WXDEBUG__
 685