src/gtk1/app.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk1/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 #endif
  29
  30 #include "wx/gdicmn.h"
  31 #include "wx/memory.h"
  32 #include "wx/font.h"
  33 #include "wx/file.h"
  34 #include "wx/filename.h"
  35 #include "wx/module.h"
  36 #include "wx/image.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 #if wxUSE_THREADS
  49     #include "wx/thread.h"
  50 #endif
  51
  52 #include <unistd.h>
  53
  54 #ifdef HAVE_POLL
  55     #if defined(__VMS)
  56         #include <poll.h>
  57     #else
  58         // bug in the OpenBSD headers: at least in 3.1 there is no extern "C"
  59         // in neither poll.h nor sys/poll.h which results in link errors later
  60         #ifdef __OPENBSD__
  61             extern "C"
  62             {
  63         #endif
  64
  65         #include <sys/poll.h>
  66
  67         #ifdef __OPENBSD__
  68             };
  69         #endif
  70     #endif // platform
  71 #else // !HAVE_POLL
  72     // we implement poll() ourselves using select() which is supposed exist in
  73     // all modern Unices
  74     #include <sys/types.h>
  75     #include <sys/time.h>
  76     #include <unistd.h>
  77 #endif // HAVE_POLL/!HAVE_POLL
  78
  79 #include "wx/unix/private.h"
  80 #include "wx/gtk1/win_gtk.h"
  81
  82 #include <gtk/gtk.h>
  83
  84 //-----------------------------------------------------------------------------
  85 // global data
  86 //-----------------------------------------------------------------------------
  87
  88 bool   g_mainThreadLocked = false;
  89 gint   g_pendingTag = 0;
  90
  91 static GtkWidget *gs_RootWindow = (GtkWidget*) NULL;
  92
  93 //-----------------------------------------------------------------------------
  94 // idle system
  95 //-----------------------------------------------------------------------------
  96
  97 extern bool g_isIdle;
  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: The wxMutexGui calls are not needed on GTK2 according to
 172 // the GTK faq, http://www.gtk.org/faq/#AEN500
 173 // The calls to gdk_threads_enter() and leave() are specifically noted
 174 // as not being necessary.  The MutexGui calls are still left in for GTK1.
 175 // Eliminating the MutexGui calls fixes the long-standing "random" lockup
 176 // when using wxPostEvent (which calls WakeUpIdle) from a thread.
 177
 178 void wxApp::WakeUpIdle()
 179 {
 180 #if wxUSE_THREADS
 181     if (!wxThread::IsMain())
 182         wxMutexGuiEnter();
 183 #endif // wxUSE_THREADS_
 184
 185     wxapp_install_idle_handler();
 186
 187 #if wxUSE_THREADS
 188     if (!wxThread::IsMain())
 189         wxMutexGuiLeave();
 190 #endif // wxUSE_THREADS_
 191 }
 192
 193 //-----------------------------------------------------------------------------
 194 // local functions
 195 //-----------------------------------------------------------------------------
 196
 197 // the callback functions must be extern "C" to comply with GTK+ declarations
 198 extern "C"
 199 {
 200
 201 static gint wxapp_pending_callback( gpointer WXUNUSED(data) )
 202 {
 203     if (!wxTheApp) return TRUE;
 204
 205     // When getting called from GDK's time-out handler
 206     // we are no longer within GDK's grab on the GUI
 207     // thread so we must lock it here ourselves.
 208     gdk_threads_enter();
 209
 210     // Sent idle event to all who request them.
 211     wxTheApp->ProcessPendingEvents();
 212
 213     {
 214 #if wxUSE_THREADS
 215         wxMutexLocker lock(gs_idleTagsMutex);
 216 #endif
 217         g_pendingTag = 0;
 218     }
 219
 220     // Flush the logged messages if any.
 221 #if wxUSE_LOG
 222     wxLog::FlushActive();
 223 #endif // wxUSE_LOG
 224
 225     // Release lock again
 226     gdk_threads_leave();
 227
 228     // Return FALSE to indicate that no more idle events are
 229     // to be sent (single shot instead of continuous stream)
 230     return FALSE;
 231 }
 232
 233 static gint wxapp_idle_callback( gpointer WXUNUSED(data) )
 234 {
 235     if (!wxTheApp)
 236         return TRUE;
 237
 238 #ifdef __WXDEBUG__
 239     // don't generate the idle events while the assert modal dialog is shown,
 240     // this completely confuses the apps which don't expect to be reentered
 241     // from some safely-looking functions
 242     if ( wxTheApp->IsInAssert() )
 243     {
 244         // But repaint the assertion message if necessary
 245         if (wxTopLevelWindows.GetCount() > 0)
 246         {
 247             wxWindow* win = (wxWindow*) wxTopLevelWindows.GetLast()->GetData();
 248             if (win->IsKindOf(CLASSINFO(wxGenericMessageDialog)))
 249                 win->OnInternalIdle();
 250         }
 251         return TRUE;
 252     }
 253 #endif // __WXDEBUG__
 254
 255     // When getting called from GDK's time-out handler
 256     // we are no longer within GDK's grab on the GUI
 257     // thread so we must lock it here ourselves.
 258     gdk_threads_enter();
 259
 260     // Indicate that we are now in idle mode and event handlers
 261     // will have to reinstall the idle handler again.
 262     {
 263 #if wxUSE_THREADS
 264         wxMutexLocker lock(gs_idleTagsMutex);
 265 #endif
 266         g_isIdle = TRUE;
 267         wxTheApp->m_idleTag = 0;
 268     }
 269
 270     // Send idle event to all who request them as long as
 271     // no events have popped up in the event queue.
 272     while (wxTheApp->ProcessIdle() && (gtk_events_pending() == 0))
 273         ;
 274
 275     // Release lock again
 276     gdk_threads_leave();
 277
 278     // Return FALSE to indicate that no more idle events are
 279     // to be sent (single shot instead of continuous stream).
 280     return FALSE;
 281 }
 282
 283 #if wxUSE_THREADS
 284
 285 #ifdef HAVE_POLL
 286     #define wxPoll poll
 287     #define wxPollFd pollfd
 288 #else // !HAVE_POLL
 289
 290 typedef GPollFD wxPollFd;
 291
 292 int wxPoll(wxPollFd *ufds, unsigned int nfds, int timeout)
 293 {
 294     // convert timeout from ms to struct timeval (s/us)
 295     timeval tv_timeout;
 296     tv_timeout.tv_sec = timeout/1000;
 297     tv_timeout.tv_usec = (timeout%1000)*1000;
 298
 299     // remember the highest fd used here
 300     int fdMax = -1;
 301
 302     // and fill the sets for select()
 303     fd_set readfds;
 304     fd_set writefds;
 305     fd_set exceptfds;
 306     wxFD_ZERO(&readfds);
 307     wxFD_ZERO(&writefds);
 308     wxFD_ZERO(&exceptfds);
 309
 310     unsigned int i;
 311     for ( i = 0; i < nfds; i++ )
 312     {
 313         wxASSERT_MSG( ufds[i].fd < wxFD_SETSIZE, _T("fd out of range") );
 314
 315         if ( ufds[i].events & G_IO_IN )
 316             wxFD_SET(ufds[i].fd, &readfds);
 317
 318         if ( ufds[i].events & G_IO_PRI )
 319             wxFD_SET(ufds[i].fd, &exceptfds);
 320
 321         if ( ufds[i].events & G_IO_OUT )
 322             wxFD_SET(ufds[i].fd, &writefds);
 323
 324         if ( ufds[i].fd > fdMax )
 325             fdMax = ufds[i].fd;
 326     }
 327
 328     fdMax++;
 329     int res = select(fdMax, &readfds, &writefds, &exceptfds, &tv_timeout);
 330
 331     // translate the results back
 332     for ( i = 0; i < nfds; i++ )
 333     {
 334         ufds[i].revents = 0;
 335
 336         if ( wxFD_ISSET(ufds[i].fd, &readfds ) )
 337             ufds[i].revents |= G_IO_IN;
 338
 339         if ( wxFD_ISSET(ufds[i].fd, &exceptfds ) )
 340             ufds[i].revents |= G_IO_PRI;
 341
 342         if ( wxFD_ISSET(ufds[i].fd, &writefds ) )
 343             ufds[i].revents |= G_IO_OUT;
 344     }
 345
 346     return res;
 347 }
 348
 349 #endif // HAVE_POLL/!HAVE_POLL
 350
 351 static gint wxapp_poll_func( GPollFD *ufds, guint nfds, gint timeout )
 352 {
 353     gdk_threads_enter();
 354
 355     wxMutexGuiLeave();
 356     g_mainThreadLocked = true;
 357
 358     // we rely on the fact that glib GPollFD struct is really just pollfd but
 359     // I wonder how wise is this in the long term (VZ)
 360     gint res = wxPoll( (wxPollFd *) ufds, nfds, timeout );
 361
 362     wxMutexGuiEnter();
 363     g_mainThreadLocked = false;
 364
 365     gdk_threads_leave();
 366
 367     return res;
 368 }
 369
 370 #endif // wxUSE_THREADS
 371
 372 } // extern "C"
 373
 374 void wxapp_install_idle_handler()
 375 {
 376 #if wxUSE_THREADS
 377     wxMutexLocker lock(gs_idleTagsMutex);
 378 #endif
 379
 380     // Don't install the handler if it's already installed. This test *MUST*
 381     // be done when gs_idleTagsMutex is locked!
 382     if (!g_isIdle)
 383         return;
 384
 385     // GD: this assert is raised when using the thread sample (which works)
 386     //     so the test is probably not so easy. Can widget callbacks be
 387     //     triggered from child threads and, if so, for which widgets?
 388     // wxASSERT_MSG( wxThread::IsMain() || gs_WakeUpIdle, wxT("attempt to install idle handler from widget callback in child thread (should be exclusively from wxWakeUpIdle)") );
 389
 390     wxASSERT_MSG( wxTheApp->m_idleTag == 0, wxT("attempt to install idle handler twice") );
 391
 392     g_isIdle = false;
 393
 394     if (g_pendingTag == 0)
 395         g_pendingTag = gtk_idle_add_priority( 900, wxapp_pending_callback, (gpointer) NULL );
 396
 397     // This routine gets called by all event handlers
 398     // indicating that the idle is over. It may also
 399     // get called from other thread for sending events
 400     // to the main thread (and processing these in
 401     // idle time). Very low priority.
 402     wxTheApp->m_idleTag = gtk_idle_add_priority( 1000, wxapp_idle_callback, (gpointer) NULL );
 403 }
 404
 405 //-----------------------------------------------------------------------------
 406 // Access to the root window global
 407 //-----------------------------------------------------------------------------
 408
 409 GtkWidget* wxGetRootWindow()
 410 {
 411     if (gs_RootWindow == NULL)
 412     {
 413         gs_RootWindow = gtk_window_new( GTK_WINDOW_TOPLEVEL );
 414         gtk_widget_realize( gs_RootWindow );
 415     }
 416     return gs_RootWindow;
 417 }
 418
 419 //-----------------------------------------------------------------------------
 420 // wxApp
 421 //-----------------------------------------------------------------------------
 422
 423 IMPLEMENT_DYNAMIC_CLASS(wxApp,wxEvtHandler)
 424
 425 BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
 426     EVT_IDLE(wxAppBase::OnIdle)
 427 END_EVENT_TABLE()
 428
 429 wxApp::wxApp()
 430 {
 431 #ifdef __WXDEBUG__
 432     m_isInAssert = false;
 433 #endif // __WXDEBUG__
 434
 435     m_idleTag = 0;
 436     g_isIdle = TRUE;
 437     wxapp_install_idle_handler();
 438
 439 #if wxUSE_THREADS
 440     g_main_set_poll_func( wxapp_poll_func );
 441 #endif
 442
 443     m_colorCube = (unsigned char*) NULL;
 444
 445     // this is NULL for a "regular" wxApp, but is set (and freed) by a wxGLApp
 446     m_glVisualInfo = (void *) NULL;
 447     m_glFBCInfo = (void *) NULL;
 448 }
 449
 450 wxApp::~wxApp()
 451 {
 452     if (m_idleTag) gtk_idle_remove( m_idleTag );
 453
 454     if (m_colorCube) free(m_colorCube);
 455 }
 456
 457 bool wxApp::OnInitGui()
 458 {
 459     if ( !wxAppBase::OnInitGui() )
 460         return false;
 461
 462     GdkVisual *visual = gdk_visual_get_system();
 463
 464     // if this is a wxGLApp (derived from wxApp), and we've already
 465     // chosen a specific visual, then derive the GdkVisual from that
 466     if (m_glVisualInfo != NULL)
 467     {
 468         GdkVisual* vis = gdkx_visual_get(
 469             ((XVisualInfo *) m_glVisualInfo) ->visualid );
 470         gtk_widget_set_default_visual( vis );
 471
 472         GdkColormap *colormap = gdk_colormap_new( vis, FALSE );
 473         gtk_widget_set_default_colormap( colormap );
 474
 475         visual = vis;
 476     }
 477
 478     // On some machines, the default visual is just 256 colours, so
 479     // we make sure we get the best. This can sometimes be wasteful.
 480
 481     else
 482     if ((gdk_visual_get_best() != gdk_visual_get_system()) && (m_useBestVisual))
 483     {
 484         GdkVisual* vis = gdk_visual_get_best();
 485         gtk_widget_set_default_visual( vis );
 486
 487         GdkColormap *colormap = gdk_colormap_new( vis, FALSE );
 488         gtk_widget_set_default_colormap( colormap );
 489
 490         visual = vis;
 491     }
 492
 493     // Nothing to do for 15, 16, 24, 32 bit displays
 494     if (visual->depth > 8) return TRUE;
 495
 496     // initialize color cube for 8-bit color reduction dithering
 497
 498     GdkColormap *cmap = gtk_widget_get_default_colormap();
 499
 500     m_colorCube = (unsigned char*)malloc(32 * 32 * 32);
 501
 502     for (int r = 0; r < 32; r++)
 503     {
 504         for (int g = 0; g < 32; g++)
 505         {
 506             for (int b = 0; b < 32; b++)
 507             {
 508                 int rr = (r << 3) | (r >> 2);
 509                 int gg = (g << 3) | (g >> 2);
 510                 int bb = (b << 3) | (b >> 2);
 511
 512                 int index = -1;
 513
 514                 GdkColor *colors = cmap->colors;
 515                 if (colors)
 516                 {
 517                     int max = 3 * 65536;
 518
 519                     for (int i = 0; i < cmap->size; i++)
 520                     {
 521                         int rdiff = ((rr << 8) - colors[i].red);
 522                         int gdiff = ((gg << 8) - colors[i].green);
 523                         int bdiff = ((bb << 8) - colors[i].blue);
 524                         int sum = ABS (rdiff) + ABS (gdiff) + ABS (bdiff);
 525                         if (sum < max)
 526                         {
 527                             index = i; max = sum;
 528                         }
 529                     }
 530                 }
 531                 else
 532                 {
 533                     // assume 8-bit true or static colors. this really exists
 534                     GdkVisual* vis = gdk_colormap_get_visual( cmap );
 535                     index = (r >> (5 - vis->red_prec)) << vis->red_shift;
 536                     index |= (g >> (5 - vis->green_prec)) << vis->green_shift;
 537                     index |= (b >> (5 - vis->blue_prec)) << vis->blue_shift;
 538                 }
 539                 m_colorCube[ (r*1024) + (g*32) + b ] = index;
 540             }
 541         }
 542     }
 543
 544     return true;
 545 }
 546
 547 GdkVisual *wxApp::GetGdkVisual()
 548 {
 549     GdkVisual *visual = NULL;
 550
 551     if (m_glVisualInfo)
 552         visual = gdkx_visual_get( ((XVisualInfo *) m_glVisualInfo)->visualid );
 553     else
 554         visual = gdk_window_get_visual( wxGetRootWindow()->window );
 555
 556     wxASSERT( visual );
 557
 558     return visual;
 559 }
 560
 561 bool wxApp::Initialize(int& argc, wxChar **argv)
 562 {
 563     bool init_result;
 564
 565 #if wxUSE_THREADS
 566     // GTK 1.2 up to version 1.2.3 has broken threads
 567     if ((gtk_major_version == 1) &&
 568         (gtk_minor_version == 2) &&
 569         (gtk_micro_version < 4))
 570     {
 571         printf( "wxWidgets warning: GUI threading disabled due to outdated GTK version\n" );
 572     }
 573     else
 574     {
 575         if (!g_thread_supported())
 576             g_thread_init(NULL);
 577     }
 578 #endif // wxUSE_THREADS
 579
 580     gtk_set_locale();
 581
 582     // We should have the wxUSE_WCHAR_T test on the _outside_
 583 #if wxUSE_WCHAR_T
 584         if (!wxOKlibc())
 585             wxConvCurrent = &wxConvLocal;
 586 #else // !wxUSE_WCHAR_T
 587     if (!wxOKlibc())
 588         wxConvCurrent = (wxMBConv*) NULL;
 589 #endif // wxUSE_WCHAR_T/!wxUSE_WCHAR_T
 590
 591 #if wxUSE_UNICODE
 592     // gtk_init() wants UTF-8, not wchar_t, so convert
 593     int i;
 594     char **argvGTK = new char *[argc + 1];
 595     for ( i = 0; i < argc; i++ )
 596     {
 597         argvGTK[i] = wxStrdupA(wxConvUTF8.cWX2MB(argv[i]));
 598     }
 599
 600     argvGTK[argc] = NULL;
 601
 602     int argcGTK = argc;
 603
 604 #ifdef __WXGPE__
 605     init_result = true;  // is there a _check() version of this?
 606     gpe_application_init( &argcGTK, &argvGTK );
 607 #else
 608     init_result = gtk_init_check( &argcGTK, &argvGTK );
 609 #endif
 610
 611     if ( argcGTK != argc )
 612     {
 613         // we have to drop the parameters which were consumed by GTK+
 614         for ( i = 0; i < argcGTK; i++ )
 615         {
 616             while ( strcmp(wxConvUTF8.cWX2MB(argv[i]), argvGTK[i]) != 0 )
 617             {
 618                 memmove(argv + i, argv + i + 1, argc - i);
 619             }
 620         }
 621
 622         argc = argcGTK;
 623     }
 624     //else: gtk_init() didn't modify our parameters
 625
 626     // free our copy
 627     for ( i = 0; i < argcGTK; i++ )
 628     {
 629         free(argvGTK[i]);
 630     }
 631
 632     delete [] argvGTK;
 633 #else // !wxUSE_UNICODE
 634     // gtk_init() shouldn't actually change argv itself (just its contents) so
 635     // it's ok to pass pointer to it
 636     init_result = gtk_init_check( &argc, &argv );
 637 #endif // wxUSE_UNICODE/!wxUSE_UNICODE
 638
 639     if (!init_result) {
 640         wxLogError(wxT("Unable to initialize gtk, is DISPLAY set properly?"));
 641         return false;
 642     }
 643
 644     // we can not enter threads before gtk_init is done
 645     gdk_threads_enter();
 646
 647     if ( !wxAppBase::Initialize(argc, argv) )
 648     {
 649         gdk_threads_leave();
 650
 651         return false;
 652     }
 653
 654     wxSetDetectableAutoRepeat( TRUE );
 655
 656 #if wxUSE_INTL
 657     wxFont::SetDefaultEncoding(wxLocale::GetSystemEncoding());
 658 #endif
 659
 660     return true;
 661 }
 662
 663 void wxApp::CleanUp()
 664 {
 665     gdk_threads_leave();
 666
 667     wxAppBase::CleanUp();
 668 }
 669
 670 #ifdef __WXDEBUG__
 671
 672 void wxApp::OnAssert(const wxChar *file, int line, const wxChar* cond, const wxChar *msg)
 673 {
 674     m_isInAssert = true;
 675
 676     wxAppBase::OnAssert(file, line, cond, msg);
 677
 678     m_isInAssert = false;
 679 }
 680
 681 #endif // __WXDEBUG__
 682
 683 void wxApp::RemoveIdleTag()
 684 {
 685 #if wxUSE_THREADS
 686     wxMutexLocker lock(gs_idleTagsMutex);
 687 #endif
 688     if (!g_isIdle)
 689     {
 690         gtk_idle_remove( wxTheApp->m_idleTag );
 691         wxTheApp->m_idleTag = 0;
 692         g_isIdle = true;
 693     }
 694 }