src/motif/app.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/motif/app.cpp
   3 // Purpose:     wxApp
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     17/09/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // For compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #include "wx/app.h"
  16
  17 #ifndef WX_PRECOMP
  18     #include "wx/hash.h"
  19     #include "wx/intl.h"
  20     #include "wx/log.h"
  21     #include "wx/utils.h"
  22     #include "wx/memory.h"
  23     #include "wx/font.h"
  24 #endif
  25
  26 #include "wx/evtloop.h"
  27
  28 #if wxUSE_THREADS
  29     #include "wx/thread.h"
  30 #endif
  31
  32 #ifdef __VMS__
  33     #pragma message disable nosimpint
  34 #endif
  35 #include <Xm/Xm.h>
  36 #include <X11/Xlib.h>
  37 #include <X11/Xutil.h>
  38 #include <X11/Xresource.h>
  39 #include <X11/Xatom.h>
  40 #ifdef __VMS__
  41     #pragma message enable nosimpint
  42 #endif
  43
  44 #include "wx/motif/private.h"
  45
  46 #include <string.h>
  47
  48 struct wxPerDisplayData
  49 {
  50     wxPerDisplayData()
  51     {
  52         m_visualInfo = NULL;
  53         m_topLevelWidget = NULL;
  54         m_topLevelRealizedWidget = NULL;
  55     }
  56
  57     wxXVisualInfo* m_visualInfo;
  58     Widget         m_topLevelWidget, m_topLevelRealizedWidget;
  59 };
  60
  61 static void wxTLWidgetDestroyCallback(Widget w, XtPointer clientData,
  62                                       XtPointer ptr);
  63 static WXWidget wxCreateTopLevelWidget( WXDisplay* display );
  64
  65 extern bool wxAddIdleCallback();
  66
  67 wxHashTable *wxWidgetHashTable = NULL;
  68
  69 IMPLEMENT_DYNAMIC_CLASS(wxApp, wxEvtHandler)
  70
  71 extern "C"
  72 {
  73     typedef int (*XErrorHandlerFunc)(Display *, XErrorEvent *);
  74 }
  75
  76 XErrorHandlerFunc gs_pfnXErrorHandler = 0;
  77
  78 extern "C"
  79 {
  80
  81 static int wxXErrorHandler(Display *dpy, XErrorEvent *xevent)
  82 {
  83     // just forward to the default handler for now
  84     return gs_pfnXErrorHandler(dpy, xevent);
  85 }
  86
  87 }
  88
  89 bool wxApp::Initialize(int& argc_, wxChar **argv_)
  90 {
  91 #if wxUSE_INTL
  92     wxFont::SetDefaultEncoding(wxLocale::GetSystemEncoding());
  93 #endif
  94
  95     if ( !wxAppBase::Initialize(argc_, argv_) )
  96         return false;
  97
  98     wxWidgetHashTable = new wxHashTable(wxKEY_INTEGER);
  99
 100 #ifdef __HPUX__
 101     // under HP-UX creating XmFontSet fails when the system locale is C and
 102     // we're using a remote DISPLAY, presumably because HP-UX uses its own
 103     // names for C and ISO locales (roman8 and iso8859n respectively) and so
 104     // its Motif libraries have troubles with non-HP X server
 105     //
 106     // whatever the reason, the fact is that without this hack any wxMotif
 107     // program crashes on startup because it can't create any font (HP programs
 108     // still work but they do spit out messages about failing to create font
 109     // sets and failing back on "fixed" font too)
 110     //
 111     // notice that calling setlocale() here is not enough because X(m) init
 112     // functions call setlocale() later so we really have to change environment
 113     bool fixAll = false; // tweak LC_ALL (or just LC_CTYPE)?
 114     const char *loc = getenv("LC_CTYPE");
 115     if ( !loc )
 116     {
 117         loc = getenv("LC_ALL");
 118         if ( loc )
 119             fixAll = true;
 120     }
 121
 122     if ( !loc ||
 123             (loc[0] == 'C' && loc[1] == '\0') ||
 124                 strcmp(loc, "POSIX") == 0 )
 125     {
 126         // we're using C locale, "fix" it
 127         wxLogDebug(wxT("HP-UX fontset hack: forcing locale to en_US.iso88591"));
 128         putenv(fixAll ? "LC_ALL=en_US.iso88591" : "LC_CTYPE=en_US.iso88591");
 129     }
 130 #endif // __HPUX__
 131
 132     XtSetLanguageProc(NULL, NULL, NULL);
 133     XtToolkitInitialize() ;
 134     wxTheApp->m_appContext = (WXAppContext) XtCreateApplicationContext();
 135
 136     static char *fallbackResources[] = {
 137         // better defaults for CDE under Irix
 138         //
 139         // TODO: do something similar for the other systems, the hardcoded defaults
 140         //       below are ugly
 141 #ifdef __SGI__
 142         wxMOTIF_STR("*sgiMode: True"),
 143         wxMOTIF_STR("*useSchemes: all"),
 144 #else // !__SGI__
 145 #if !wxMOTIF_USE_RENDER_TABLE
 146         wxMOTIF_STR("*.fontList: -*-helvetica-medium-r-normal-*-*-120-*-*-*-*-*-*"),
 147 #else
 148         wxMOTIF_STR("*wxDefaultRendition.fontName: -*-helvetica-medium-r-normal-*-*-120-*-*-*-*-*-*"),
 149         wxMOTIF_STR("*wxDefaultRendition.fontType: FONT_IS_FONTSET"),
 150         wxMOTIF_STR("*.renderTable: wxDefaultRendition"),
 151 #endif
 152         wxMOTIF_STR("*listBox.background: white"),
 153         wxMOTIF_STR("*text.background: white"),
 154         wxMOTIF_STR("*comboBox.Text.background: white"),
 155         wxMOTIF_STR("*comboBox.List.background: white"),
 156 #endif // __SGI__/!__SGI__
 157         NULL
 158     };
 159     XtAppSetFallbackResources((XtAppContext) wxTheApp->m_appContext, fallbackResources);
 160
 161     // we shouldn't pass empty application/class name as it results in
 162     // immediate crash inside XOpenIM() (if XIM is used) under IRIX
 163     wxString appname = wxTheApp->GetAppName();
 164     if ( appname.empty() )
 165         appname = wxT("wxapp");
 166     wxString clsname = wxTheApp->GetClassName();
 167     if ( clsname.empty() )
 168         clsname = wxT("wx");
 169
 170     // FIXME-UTF8: This code is taken from wxGTK and duplicated here. This
 171     //             is just a temporary fix to make wxX11 compile in Unicode
 172     //             build, the real fix is to change Initialize()'s signature
 173     //             to use char* on Unix.
 174 #if wxUSE_UNICODE
 175     // XtOpenDisplay() wants char*, not wchar_t*, so convert
 176     int i;
 177     char **argvX11 = new char *[argc + 1];
 178     for ( i = 0; i < argc; i++ )
 179     {
 180         argvX11[i] = strdup(wxConvLibc.cWX2MB(argv_[i]));
 181     }
 182
 183     argvX11[argc] = NULL;
 184
 185     int argcX11 = argc;
 186
 187     Display *dpy = XtOpenDisplay((XtAppContext) wxTheApp->m_appContext,
 188         (String)NULL,
 189         appname.c_str(),
 190         clsname.c_str(),
 191         NULL, 0,    // no options
 192 # if XtSpecificationRelease < 5
 193         (Cardinal*) &argcX11,
 194 # else
 195         &argcX11,
 196 # endif
 197         argvX11);
 198
 199     if ( argcX11 != argc )
 200     {
 201         // we have to drop the parameters which were consumed by X11+
 202         for ( i = 0; i < argcX11; i++ )
 203         {
 204             while ( strcmp(wxConvLibc.cWX2MB(argv_[i]), argvX11[i]) != 0 )
 205             {
 206                 memmove(argv_ + i, argv_ + i + 1, (argc - i)*sizeof(*argv_));
 207             }
 208         }
 209
 210         argc = argcX11;
 211
 212         // update internal arg[cv] as X11 may have removed processed options:
 213         argc = argc_;
 214         argv = argv_;
 215     }
 216     //else: XtOpenDisplay() didn't modify our parameters
 217
 218     // free our copy
 219     for ( i = 0; i < argcX11; i++ )
 220     {
 221         free(argvX11[i]);
 222     }
 223
 224     delete [] argvX11;
 225
 226 #else // ANSI
 227
 228     Display *dpy = XtOpenDisplay((XtAppContext) wxTheApp->m_appContext,
 229         (String)NULL,
 230         appname.c_str(),
 231         clsname.c_str(),
 232         NULL, 0,    // no options
 233 # if XtSpecificationRelease < 5
 234         (Cardinal*) &argc,
 235 # else
 236         &argc,
 237 # endif
 238         argv);
 239
 240 #endif // Unicode/ANSI
 241
 242     if (!dpy) {
 243          // if you don't log to stderr, nothing will be shown...
 244         delete wxLog::SetActiveTarget(new wxLogStderr);
 245         wxString className(wxTheApp->GetClassName());
 246         wxLogError(_("wxWidgets could not open display for '%s': exiting."),
 247                    className.c_str());
 248         exit(-1);
 249     }
 250     m_initialDisplay = (WXDisplay*) dpy;
 251
 252     // install the X error handler
 253     gs_pfnXErrorHandler = XSetErrorHandler(wxXErrorHandler);
 254
 255     // Add general resize proc
 256     XtActionsRec rec;
 257     rec.string = wxMOTIF_STR("resize");
 258     rec.proc = (XtActionProc)wxWidgetResizeProc;
 259     XtAppAddActions((XtAppContext) wxTheApp->m_appContext, &rec, 1);
 260
 261     GetMainColormap(dpy);
 262
 263     wxAddIdleCallback();
 264
 265     return true;
 266 }
 267
 268 void wxApp::CleanUp()
 269 {
 270     wxAppBase::CleanUp();
 271
 272     wxDELETE(wxWidgetHashTable);
 273
 274     delete m_mainLoop;
 275
 276     for( wxPerDisplayDataMap::iterator it  = m_perDisplayData->begin(),
 277                                        end = m_perDisplayData->end();
 278          it != end; ++it )
 279     {
 280         delete it->second->m_visualInfo;
 281         // On Solaris 10 calling XtDestroyWidget on the top level widget
 282         // dumps core if the locale is set to something other than "C"
 283 #ifndef __SUN__
 284         XtDestroyWidget( it->second->m_topLevelWidget );
 285 #endif
 286         delete it->second;
 287     }
 288 }
 289
 290 void wxApp::Exit()
 291 {
 292     wxApp::CleanUp();
 293
 294     wxAppConsole::Exit();
 295 }
 296
 297 // ============================================================================
 298 // wxApp
 299 // ============================================================================
 300
 301 wxApp::wxApp()
 302 {
 303     m_mainLoop = new wxEventLoop;
 304     m_mainColormap = (WXColormap) NULL;
 305     m_appContext = (WXAppContext) NULL;
 306     m_initialDisplay = (WXDisplay*) 0;
 307     m_perDisplayData = new wxPerDisplayDataMap;
 308 }
 309
 310 wxApp::~wxApp()
 311 {
 312     delete m_perDisplayData;
 313 }
 314
 315 int wxApp::MainLoop()
 316 {
 317     /*
 318     * Sit around forever waiting to process X-events. Property Change
 319     * event are handled special, because they have to refer to
 320     * the root window rather than to a widget. therefore we can't
 321     * use an Xt-eventhandler.
 322     */
 323
 324     XSelectInput(XtDisplay((Widget) wxTheApp->GetTopLevelWidget()),
 325         XDefaultRootWindow(XtDisplay((Widget) wxTheApp->GetTopLevelWidget())),
 326         PropertyChangeMask);
 327
 328     m_mainLoop->Run();
 329
 330     return 0;
 331 }
 332
 333 // This should be redefined in a derived class for
 334 // handling property change events for XAtom IPC.
 335 void wxApp::HandlePropertyChange(WXEvent *event)
 336 {
 337     // by default do nothing special
 338     XtDispatchEvent((XEvent*) event); /* let Motif do the work */
 339 }
 340
 341 WXColormap wxApp::GetMainColormap(WXDisplay* display)
 342 {
 343     if (!display) /* Must be called first with non-NULL display */
 344         return m_mainColormap;
 345
 346     int defaultScreen = DefaultScreen((Display*) display);
 347     Screen* screen = XScreenOfDisplay((Display*) display, defaultScreen);
 348
 349     Colormap c = DefaultColormapOfScreen(screen);
 350
 351     if (!m_mainColormap)
 352         m_mainColormap = (WXColormap) c;
 353
 354     return (WXColormap) c;
 355 }
 356
 357 static inline wxPerDisplayData& GetOrCreatePerDisplayData
 358     ( wxPerDisplayDataMap& m, WXDisplay* display )
 359 {
 360     wxPerDisplayDataMap::iterator it = m.find( display );
 361     if( it != m.end() && it->second != NULL )
 362         return *(it->second);
 363
 364     wxPerDisplayData* nData = new wxPerDisplayData();
 365     m[display] = nData;
 366
 367     return *nData;
 368 }
 369
 370 wxXVisualInfo* wxApp::GetVisualInfo( WXDisplay* display )
 371 {
 372     wxPerDisplayData& data = GetOrCreatePerDisplayData( *m_perDisplayData,
 373                                                         display );
 374     if( data.m_visualInfo )
 375         return data.m_visualInfo;
 376
 377     wxXVisualInfo* vi = new wxXVisualInfo;
 378     wxFillXVisualInfo( vi, (Display*)display );
 379
 380     data.m_visualInfo = vi;
 381
 382     return vi;
 383 }
 384
 385 static void wxTLWidgetDestroyCallback(Widget w, XtPointer WXUNUSED(clientData),
 386                                       XtPointer WXUNUSED(ptr))
 387 {
 388     if( wxTheApp )
 389     {
 390         wxTheApp->SetTopLevelWidget( (WXDisplay*)XtDisplay(w),
 391                                      (WXWidget)NULL );
 392         wxTheApp->SetTopLevelRealizedWidget( (WXDisplay*)XtDisplay(w),
 393                                              (WXWidget)NULL );
 394     }
 395 }
 396
 397 WXWidget wxCreateTopLevelWidget( WXDisplay* display )
 398 {
 399     Widget tlw = XtAppCreateShell( (String)NULL,
 400                                    wxTheApp->GetClassName().c_str(),
 401                                    applicationShellWidgetClass,
 402                                    (Display*)display,
 403                                    NULL, 0 );
 404     XtVaSetValues( tlw,
 405                    XmNoverrideRedirect, True,
 406                    NULL );
 407
 408     XtAddCallback( tlw, XmNdestroyCallback,
 409                    (XtCallbackProc)wxTLWidgetDestroyCallback,
 410                    (XtPointer)NULL );
 411
 412     return (WXWidget)tlw;
 413 }
 414
 415 WXWidget wxCreateTopLevelRealizedWidget( WXDisplay* WXUNUSED(display) )
 416 {
 417     Widget rTlw = XtVaCreateWidget( "dummy_widget", topLevelShellWidgetClass,
 418                                     (Widget)wxTheApp->GetTopLevelWidget(),
 419                                      NULL );
 420     XtSetMappedWhenManaged( rTlw, False );
 421     XtRealizeWidget( rTlw );
 422
 423     return (WXWidget)rTlw;
 424 }
 425
 426 WXWidget wxApp::GetTopLevelWidget()
 427 {
 428     WXDisplay* display = wxGetDisplay();
 429     wxPerDisplayData& data = GetOrCreatePerDisplayData( *m_perDisplayData,
 430                                                         display );
 431     if( data.m_topLevelWidget )
 432         return (WXWidget)data.m_topLevelWidget;
 433
 434     WXWidget tlw = wxCreateTopLevelWidget( display );
 435     SetTopLevelWidget( display, tlw );
 436
 437     return tlw;
 438 }
 439
 440 WXWidget wxApp::GetTopLevelRealizedWidget()
 441 {
 442     WXDisplay* display = wxGetDisplay();
 443     wxPerDisplayDataMap::iterator it = m_perDisplayData->find( display );
 444
 445     if( it != m_perDisplayData->end() && it->second->m_topLevelRealizedWidget )
 446         return (WXWidget)it->second->m_topLevelRealizedWidget;
 447
 448     WXWidget rTlw = wxCreateTopLevelRealizedWidget( display );
 449     SetTopLevelRealizedWidget( display, rTlw );
 450
 451     return rTlw;
 452 }
 453
 454 void wxApp::SetTopLevelWidget(WXDisplay* display, WXWidget widget)
 455 {
 456     GetOrCreatePerDisplayData( *m_perDisplayData, display )
 457         .m_topLevelWidget = (Widget)widget;
 458 }
 459
 460 void wxApp::SetTopLevelRealizedWidget(WXDisplay* display, WXWidget widget)
 461 {
 462     GetOrCreatePerDisplayData( *m_perDisplayData, display )
 463         .m_topLevelRealizedWidget = (Widget)widget;
 464 }
 465
 466
 467 // ----------------------------------------------------------------------------
 468 // accessors for C modules
 469 // ----------------------------------------------------------------------------
 470
 471 extern "C" XtAppContext wxGetAppContext()
 472 {
 473     return (XtAppContext)wxTheApp->GetAppContext();
 474 }