1 /////////////////////////////////////////////////////////////////////////////
2 // Name: src/gtk/app.cpp
3 // Purpose:
4 // Author: Robert Roebling
5 // Copyright: (c) 1998 Robert Roebling, Julian Smart
6 // Licence: wxWindows licence
7 /////////////////////////////////////////////////////////////////////////////
8
9 // For compilers that support precompilation, includes "wx.h".
10 #include "wx/wxprec.h"
11
12 #include "wx/app.h"
13
14 #ifndef WX_PRECOMP
15 #include "wx/intl.h"
16 #include "wx/log.h"
17 #include "wx/utils.h"
18 #include "wx/memory.h"
19 #include "wx/font.h"
20 #endif
21
22 #include "wx/thread.h"
23
24 #ifdef __WXGPE__
25 #include <gpe/init.h>
26 #endif
27
28 #include "wx/apptrait.h"
29 #include "wx/fontmap.h"
30
31 #if wxUSE_LIBHILDON
32 #include <hildon-widgets/hildon-program.h>
33 #endif // wxUSE_LIBHILDON
34
35 #if wxUSE_LIBHILDON2
36 #include <hildon/hildon.h>
37 #endif // wxUSE_LIBHILDON2
38
39 #include <gtk/gtk.h>
40 #include "wx/gtk/private.h"
41
42 //-----------------------------------------------------------------------------
43 // link GnomeVFS
44 //-----------------------------------------------------------------------------
45
46 #if wxUSE_MIMETYPE && wxUSE_LIBGNOMEVFS
47 #include "wx/link.h"
wxFORCE_LINK_MODULE(gnome_vfs)48 wxFORCE_LINK_MODULE(gnome_vfs)
49 #endif
50
51 //-----------------------------------------------------------------------------
52 // local functions
53 //-----------------------------------------------------------------------------
54
55 // One-shot signal emission hook, to install idle handler.
56 extern "C" {
57 static gboolean
58 wx_emission_hook(GSignalInvocationHint*, guint, const GValue*, gpointer data)
59 {
60 wxApp* app = wxTheApp;
61 if (app != NULL)
62 app->WakeUpIdle();
63 bool* hook_installed = (bool*)data;
64 // record that hook is not installed
65 *hook_installed = false;
66 // remove hook
67 return false;
68 }
69 }
70
71 // Add signal emission hooks, to re-install idle handler when needed.
wx_add_idle_hooks()72 static void wx_add_idle_hooks()
73 {
74 // "event" hook
75 {
76 static bool hook_installed;
77 if (!hook_installed)
78 {
79 static guint sig_id;
80 if (sig_id == 0)
81 sig_id = g_signal_lookup("event", GTK_TYPE_WIDGET);
82 hook_installed = true;
83 g_signal_add_emission_hook(
84 sig_id, 0, wx_emission_hook, &hook_installed, NULL);
85 }
86 }
87 // "size_allocate" hook
88 // Needed to match the behaviour of the old idle system,
89 // but probably not necessary.
90 {
91 static bool hook_installed;
92 if (!hook_installed)
93 {
94 static guint sig_id;
95 if (sig_id == 0)
96 sig_id = g_signal_lookup("size_allocate", GTK_TYPE_WIDGET);
97 hook_installed = true;
98 g_signal_add_emission_hook(
99 sig_id, 0, wx_emission_hook, &hook_installed, NULL);
100 }
101 }
102 }
103
104 extern "C" {
wxapp_idle_callback(gpointer)105 static gboolean wxapp_idle_callback(gpointer)
106 {
107 return wxTheApp->DoIdle();
108 }
109 }
110
111 // 0: no change, 1: focus in, 2: focus out
112 static int gs_focusChange;
113
114 extern "C" {
115 static gboolean
wx_focus_event_hook(GSignalInvocationHint *,unsigned,const GValue * param_values,void * data)116 wx_focus_event_hook(GSignalInvocationHint*, unsigned, const GValue* param_values, void* data)
117 {
118 // If focus change on TLW
119 if (GTK_IS_WINDOW(g_value_peek_pointer(param_values)))
120 gs_focusChange = GPOINTER_TO_INT(data);
121
122 return true;
123 }
124 }
125
DoIdle()126 bool wxApp::DoIdle()
127 {
128 guint id_save;
129 {
130 // Allow another idle source to be added while this one is busy.
131 // Needed if an idle event handler runs a new event loop,
132 // for example by showing a dialog.
133 #if wxUSE_THREADS
134 wxMutexLocker lock(m_idleMutex);
135 #endif
136 id_save = m_idleSourceId;
137 m_idleSourceId = 0;
138 wx_add_idle_hooks();
139
140 #if wxDEBUG_LEVEL
141 // don't generate the idle events while the assert modal dialog is shown,
142 // this matches the behaviour of wxMSW
143 if (m_isInAssert)
144 return false;
145 #endif
146 }
147
148 gdk_threads_enter();
149
150 if (gs_focusChange) {
151 SetActive(gs_focusChange == 1, NULL);
152 gs_focusChange = 0;
153 }
154
155 bool needMore;
156 do {
157 ProcessPendingEvents();
158
159 needMore = ProcessIdle();
160 } while (needMore && gtk_events_pending() == 0);
161 gdk_threads_leave();
162
163 #if wxUSE_THREADS
164 wxMutexLocker lock(m_idleMutex);
165 #endif
166
167 bool keepSource = false;
168 // if a new idle source has not been added, either as a result of idle
169 // processing above or by another thread calling WakeUpIdle()
170 if (m_idleSourceId == 0)
171 {
172 // if more idle processing was requested or pending events have appeared
173 if (needMore || HasPendingEvents())
174 {
175 // keep this source installed
176 m_idleSourceId = id_save;
177 keepSource = true;
178 }
179 else // add hooks and remove this source
180 wx_add_idle_hooks();
181 }
182 // else remove this source, leave new one installed
183 // we must keep an idle source, otherwise a wakeup could be lost
184
185 return keepSource;
186 }
187
188 //-----------------------------------------------------------------------------
189 // Access to the root window global
190 //-----------------------------------------------------------------------------
191
wxGetRootWindow()192 GtkWidget* wxGetRootWindow()
193 {
194 static GtkWidget *s_RootWindow = NULL;
195
196 if (s_RootWindow == NULL)
197 {
198 s_RootWindow = gtk_window_new( GTK_WINDOW_TOPLEVEL );
199 gtk_widget_realize( s_RootWindow );
200 }
201 return s_RootWindow;
202 }
203
204 //-----------------------------------------------------------------------------
205 // wxApp
206 //-----------------------------------------------------------------------------
207
IMPLEMENT_DYNAMIC_CLASS(wxApp,wxEvtHandler)208 IMPLEMENT_DYNAMIC_CLASS(wxApp,wxEvtHandler)
209
210 wxApp::wxApp()
211 {
212 m_isInAssert = false;
213 m_idleSourceId = 0;
214 }
215
~wxApp()216 wxApp::~wxApp()
217 {
218 }
219
SetNativeTheme(const wxString & theme)220 bool wxApp::SetNativeTheme(const wxString& theme)
221 {
222 #ifdef __WXGTK3__
223 wxUnusedVar(theme);
224 return false;
225 #else
226 wxString path;
227 path = gtk_rc_get_theme_dir();
228 path += "/";
229 path += theme.utf8_str();
230 path += "/gtk-2.0/gtkrc";
231
232 if ( wxFileExists(path.utf8_str()) )
233 gtk_rc_add_default_file(path.utf8_str());
234 else if ( wxFileExists(theme.utf8_str()) )
235 gtk_rc_add_default_file(theme.utf8_str());
236 else
237 {
238 wxLogWarning("Theme \"%s\" not available.", theme);
239
240 return false;
241 }
242
243 gtk_rc_reparse_all_for_settings(gtk_settings_get_default(), TRUE);
244
245 return true;
246 #endif
247 }
248
OnInitGui()249 bool wxApp::OnInitGui()
250 {
251 if ( !wxAppBase::OnInitGui() )
252 return false;
253
254 #ifndef __WXGTK3__
255 // if this is a wxGLApp (derived from wxApp), and we've already
256 // chosen a specific visual, then derive the GdkVisual from that
257 if ( GetXVisualInfo() )
258 {
259 GdkVisual* vis = gtk_widget_get_default_visual();
260
261 GdkColormap *colormap = gdk_colormap_new( vis, FALSE );
262 gtk_widget_set_default_colormap( colormap );
263 }
264 else
265 {
266 // On some machines, the default visual is just 256 colours, so
267 // we make sure we get the best. This can sometimes be wasteful.
268 if (m_useBestVisual)
269 {
270 if (m_forceTrueColour)
271 {
272 GdkVisual* visual = gdk_visual_get_best_with_both( 24, GDK_VISUAL_TRUE_COLOR );
273 if (!visual)
274 {
275 wxLogError(wxT("Unable to initialize TrueColor visual."));
276 return false;
277 }
278 GdkColormap *colormap = gdk_colormap_new( visual, FALSE );
279 gtk_widget_set_default_colormap( colormap );
280 }
281 else
282 {
283 if (gdk_visual_get_best() != gdk_visual_get_system())
284 {
285 GdkVisual* visual = gdk_visual_get_best();
286 GdkColormap *colormap = gdk_colormap_new( visual, FALSE );
287 gtk_widget_set_default_colormap( colormap );
288 }
289 }
290 }
291 }
292 #endif
293
294 #if wxUSE_LIBHILDON || wxUSE_LIBHILDON2
295 if ( !GetHildonProgram() )
296 {
297 wxLogError(_("Unable to initialize Hildon program"));
298 return false;
299 }
300 #endif // wxUSE_LIBHILDON || wxUSE_LIBHILDON2
301
302 return true;
303 }
304
305 // use unusual names for the parameters to avoid conflict with wxApp::arg[cv]
Initialize(int & argc_,wxChar ** argv_)306 bool wxApp::Initialize(int& argc_, wxChar **argv_)
307 {
308 if ( !wxAppBase::Initialize(argc_, argv_) )
309 return false;
310
311 #if wxUSE_THREADS
312 if (!g_thread_supported())
313 {
314 g_thread_init(NULL);
315 gdk_threads_init();
316 }
317 #endif // wxUSE_THREADS
318
319 // gtk+ 2.0 supports Unicode through UTF-8 strings
320 wxConvCurrent = &wxConvUTF8;
321
322 #ifdef __UNIX__
323 // decide which conversion to use for the file names
324
325 // (1) this variable exists for the sole purpose of specifying the encoding
326 // of the filenames for GTK+ programs, so use it if it is set
327 wxString encName(wxGetenv(wxT("G_FILENAME_ENCODING")));
328 encName = encName.BeforeFirst(wxT(','));
329 if (encName.CmpNoCase(wxT("@locale")) == 0)
330 encName.clear();
331 encName.MakeUpper();
332 if (encName.empty())
333 {
334 #if wxUSE_INTL
335 // (2) if a non default locale is set, assume that the user wants his
336 // filenames in this locale too
337 encName = wxLocale::GetSystemEncodingName().Upper();
338
339 // But don't consider ASCII in this case.
340 if ( !encName.empty() )
341 {
342 #if wxUSE_FONTMAP
343 wxFontEncoding enc = wxFontMapperBase::GetEncodingFromName(encName);
344 if ( enc == wxFONTENCODING_DEFAULT )
345 #else // !wxUSE_FONTMAP
346 if ( encName == wxT("US-ASCII") )
347 #endif // wxUSE_FONTMAP/!wxUSE_FONTMAP
348 {
349 // This means US-ASCII when returned from GetEncodingFromName().
350 encName.clear();
351 }
352 }
353 #endif // wxUSE_INTL
354
355 // (3) finally use UTF-8 by default
356 if ( encName.empty() )
357 encName = wxT("UTF-8");
358 wxSetEnv(wxT("G_FILENAME_ENCODING"), encName);
359 }
360
361 static wxConvBrokenFileNames fileconv(encName);
362 wxConvFileName = &fileconv;
363 #endif // __UNIX__
364
365
366 bool init_result;
367 int i;
368
369 #if wxUSE_UNICODE
370 // gtk_init() wants UTF-8, not wchar_t, so convert
371 char **argvGTK = new char *[argc_ + 1];
372 for ( i = 0; i < argc_; i++ )
373 {
374 argvGTK[i] = wxStrdupA(wxConvUTF8.cWX2MB(argv_[i]));
375 }
376
377 argvGTK[argc_] = NULL;
378
379 int argcGTK = argc_;
380
381 // Prevent gtk_init_check() from changing the locale automatically for
382 // consistency with the other ports that don't do it. If necessary,
383 // wxApp::SetCLocale() may be explicitly called.
384 gtk_disable_setlocale();
385
386 #ifdef __WXGPE__
387 init_result = true; // is there a _check() version of this?
388 gpe_application_init( &argcGTK, &argvGTK );
389 #else
390 init_result = gtk_init_check( &argcGTK, &argvGTK ) != 0;
391 #endif
392
393 if ( argcGTK != argc_ )
394 {
395 // we have to drop the parameters which were consumed by GTK+
396 for ( i = 0; i < argcGTK; i++ )
397 {
398 while ( strcmp(wxConvUTF8.cWX2MB(argv_[i]), argvGTK[i]) != 0 )
399 {
400 memmove(argv_ + i, argv_ + i + 1, (argc_ - i)*sizeof(*argv_));
401 }
402 }
403
404 argc_ = argcGTK;
405 argv_[argc_] = NULL;
406 }
407 //else: gtk_init() didn't modify our parameters
408
409 // free our copy
410 for ( i = 0; i < argcGTK; i++ )
411 {
412 free(argvGTK[i]);
413 }
414
415 delete [] argvGTK;
416 #else // !wxUSE_UNICODE
417 // gtk_init() shouldn't actually change argv_ itself (just its contents) so
418 // it's ok to pass pointer to it
419 init_result = gtk_init_check( &argc_, &argv_ );
420 #endif // wxUSE_UNICODE/!wxUSE_UNICODE
421
422 // update internal arg[cv] as GTK+ may have removed processed options:
423 this->argc = argc_;
424 this->argv = argv_;
425
426 if ( m_traits )
427 {
428 // if there are still GTK+ standard options unparsed in the command
429 // line, it means that they were not syntactically correct and GTK+
430 // already printed a warning on the command line and we should now
431 // exit:
432 wxArrayString opt, desc;
433 m_traits->GetStandardCmdLineOptions(opt, desc);
434
435 for ( i = 0; i < argc_; i++ )
436 {
437 // leave just the names of the options with values
438 const wxString str = wxString(argv_[i]).BeforeFirst('=');
439
440 for ( size_t j = 0; j < opt.size(); j++ )
441 {
442 // remove the leading spaces from the option string as it does
443 // have them
444 if ( opt[j].Trim(false).BeforeFirst('=') == str )
445 {
446 // a GTK+ option can be left on the command line only if
447 // there was an error in (or before, in another standard
448 // options) it, so abort, just as we do if incorrect
449 // program option is given
450 wxLogError(_("Invalid GTK+ command line option, use \"%s --help\""),
451 argv_[0]);
452 return false;
453 }
454 }
455 }
456 }
457
458 if ( !init_result )
459 {
460 wxLogError(_("Unable to initialize GTK+, is DISPLAY set properly?"));
461 return false;
462 }
463
464 // we cannot enter threads before gtk_init is done
465 gdk_threads_enter();
466
467 #if wxUSE_INTL
468 wxFont::SetDefaultEncoding(wxLocale::GetSystemEncoding());
469 #endif
470
471 // make sure GtkWidget type is loaded, signal emission hooks need it
472 const GType widgetType = GTK_TYPE_WIDGET;
473 g_type_class_ref(widgetType);
474
475 // focus in/out hooks used for generating wxEVT_ACTIVATE_APP
476 g_signal_add_emission_hook(
477 g_signal_lookup("focus_in_event", widgetType),
478 0, wx_focus_event_hook, GINT_TO_POINTER(1), NULL);
479 g_signal_add_emission_hook(
480 g_signal_lookup("focus_out_event", widgetType),
481 0, wx_focus_event_hook, GINT_TO_POINTER(2), NULL);
482
483 WakeUpIdle();
484
485 return true;
486 }
487
CleanUp()488 void wxApp::CleanUp()
489 {
490 if (m_idleSourceId != 0)
491 g_source_remove(m_idleSourceId);
492
493 // release reference acquired by Initialize()
494 gpointer gt = g_type_class_peek(GTK_TYPE_WIDGET);
495 if (gt != NULL)
496 g_type_class_unref(gt);
497
498 gdk_threads_leave();
499
500 wxAppBase::CleanUp();
501 }
502
WakeUpIdle()503 void wxApp::WakeUpIdle()
504 {
505 #if wxUSE_THREADS
506 wxMutexLocker lock(m_idleMutex);
507 #endif
508 if (m_idleSourceId == 0)
509 m_idleSourceId = g_idle_add_full(G_PRIORITY_LOW, wxapp_idle_callback, NULL, NULL);
510 }
511
512 // Checking for pending events requires first removing our idle source,
513 // otherwise it will cause the check to always return true.
EventsPending()514 bool wxApp::EventsPending()
515 {
516 #if wxUSE_THREADS
517 wxMutexLocker lock(m_idleMutex);
518 #endif
519 if (m_idleSourceId != 0)
520 {
521 g_source_remove(m_idleSourceId);
522 m_idleSourceId = 0;
523 wx_add_idle_hooks();
524 }
525 return gtk_events_pending() != 0;
526 }
527
OnAssertFailure(const wxChar * file,int line,const wxChar * func,const wxChar * cond,const wxChar * msg)528 void wxApp::OnAssertFailure(const wxChar *file,
529 int line,
530 const wxChar* func,
531 const wxChar* cond,
532 const wxChar *msg)
533 {
534 // there is no need to do anything if asserts are disabled in this build
535 // anyhow
536 #if wxDEBUG_LEVEL
537 // block wx idle events while assert dialog is showing
538 m_isInAssert = true;
539
540 wxAppBase::OnAssertFailure(file, line, func, cond, msg);
541
542 m_isInAssert = false;
543 #else // !wxDEBUG_LEVEL
544 wxUnusedVar(file);
545 wxUnusedVar(line);
546 wxUnusedVar(func);
547 wxUnusedVar(cond);
548 wxUnusedVar(msg);
549 #endif // wxDEBUG_LEVEL/!wxDEBUG_LEVEL
550 }
551
552 #if wxUSE_THREADS
MutexGuiEnter()553 void wxGUIAppTraits::MutexGuiEnter()
554 {
555 gdk_threads_enter();
556 }
557
MutexGuiLeave()558 void wxGUIAppTraits::MutexGuiLeave()
559 {
560 gdk_threads_leave();
561 }
562 #endif // wxUSE_THREADS
563
564 /* static */
GTKIsUsingGlobalMenu()565 bool wxApp::GTKIsUsingGlobalMenu()
566 {
567 static int s_isUsingGlobalMenu = -1;
568 if ( s_isUsingGlobalMenu == -1 )
569 {
570 // Currently we just check for this environment variable because this
571 // is how support for the global menu is implemented under Ubuntu.
572 //
573 // If we ever get false positives, we could also check for
574 // XDG_CURRENT_DESKTOP env var being set to "Unity".
575 wxString proxy;
576 s_isUsingGlobalMenu = wxGetEnv("UBUNTU_MENUPROXY", &proxy) &&
577 !proxy.empty() && proxy != "0";
578 }
579
580 return s_isUsingGlobalMenu == 1;
581 }
582
583 #if wxUSE_LIBHILDON || wxUSE_LIBHILDON2
584 // Maemo-specific method: get the main program object
GetHildonProgram()585 HildonProgram *wxApp::GetHildonProgram()
586 {
587 return hildon_program_get_instance();
588 }
589
590 #endif // wxUSE_LIBHILDON || wxUSE_LIBHILDON2
591