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 #ifdef __VMS
  16 #define XtParent XTPARENT
  17 #define XtDisplay XTDISPLAY
  18 #endif
  19
  20 #include "wx/app.h"
  21 #include "wx/utils.h"
  22 #include "wx/module.h"
  23 #include "wx/memory.h"
  24 #include "wx/log.h"
  25 #include "wx/intl.h"
  26 #include "wx/evtloop.h"
  27 #include "wx/hash.h"
  28
  29 #if wxUSE_THREADS
  30     #include "wx/thread.h"
  31 #endif
  32
  33 #ifdef __VMS__
  34 #pragma message disable nosimpint
  35 #endif
  36 #include <Xm/Xm.h>
  37 #include <X11/Xlib.h>
  38 #include <X11/Xutil.h>
  39 #include <X11/Xresource.h>
  40 #include <X11/Xatom.h>
  41 #ifdef __VMS__
  42 #pragma message enable nosimpint
  43 #endif
  44
  45 #include "wx/motif/private.h"
  46
  47 #include <string.h>
  48
  49 struct wxPerDisplayData
  50 {
  51     wxPerDisplayData()
  52     {
  53         m_visualInfo = NULL;
  54         m_topLevelWidget = NULL;
  55         m_topLevelRealizedWidget = NULL;
  56     }
  57
  58     wxXVisualInfo* m_visualInfo;
  59     Widget         m_topLevelWidget, m_topLevelRealizedWidget;
  60 };
  61
  62 static void wxTLWidgetDestroyCallback(Widget w, XtPointer clientData,
  63                                       XtPointer ptr);
  64 static WXWidget wxCreateTopLevelWidget( WXDisplay* display );
  65
  66 extern wxList wxPendingDelete;
  67 extern bool wxAddIdleCallback();
  68
  69 wxHashTable *wxWidgetHashTable = NULL;
  70
  71 IMPLEMENT_DYNAMIC_CLASS(wxApp, wxEvtHandler)
  72
  73 BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
  74     EVT_IDLE(wxAppBase::OnIdle)
  75 END_EVENT_TABLE()
  76
  77 #ifdef __WXDEBUG__
  78 extern "C"
  79 {
  80     typedef int (*XErrorHandlerFunc)(Display *, XErrorEvent *);
  81 }
  82
  83 XErrorHandlerFunc gs_pfnXErrorHandler = 0;
  84
  85 extern "C"
  86 {
  87
  88 static int wxXErrorHandler(Display *dpy, XErrorEvent *xevent)
  89 {
  90     // just forward to the default handler for now
  91     return gs_pfnXErrorHandler(dpy, xevent);
  92 }
  93
  94 }
  95 #endif // __WXDEBUG__
  96
  97 bool wxApp::Initialize(int& argcOrig, wxChar **argvOrig)
  98 {
  99     if ( !wxAppBase::Initialize(argcOrig, argvOrig) )
 100         return false;
 101
 102     wxWidgetHashTable = new wxHashTable(wxKEY_INTEGER);
 103
 104 #if wxUSE_INTL
 105     wxFont::SetDefaultEncoding(wxLocale::GetSystemEncoding());
 106 #endif
 107
 108     return true;
 109 }
 110
 111 void wxApp::CleanUp()
 112 {
 113     wxAppBase::CleanUp();
 114
 115     delete wxWidgetHashTable;
 116     wxWidgetHashTable = NULL;
 117
 118     delete m_mainLoop;
 119
 120     for( wxPerDisplayDataMap::iterator it  = m_perDisplayData->begin(),
 121                                        end = m_perDisplayData->end();
 122          it != end; ++it )
 123     {
 124         delete it->second->m_visualInfo;
 125         // On Solaris 10 calling XtDestroyWidget on the top level widget
 126         // dumps core if the locale is set to something other than "C"
 127 #ifndef __SUN__
 128         XtDestroyWidget( it->second->m_topLevelWidget );
 129 #endif
 130         delete it->second;
 131     }
 132
 133     delete m_perDisplayData;
 134 }
 135
 136 void wxApp::Exit()
 137 {
 138     wxApp::CleanUp();
 139
 140     wxAppConsole::Exit();
 141 }
 142
 143 // ============================================================================
 144 // wxApp
 145 // ============================================================================
 146
 147 wxApp::wxApp()
 148 {
 149     argc = 0;
 150     argv = NULL;
 151
 152     m_mainLoop = new wxEventLoop;
 153     m_mainColormap = (WXColormap) NULL;
 154     m_appContext = (WXAppContext) NULL;
 155     m_initialDisplay = (WXDisplay*) 0;
 156     m_perDisplayData = new wxPerDisplayDataMap;
 157 }
 158
 159 wxApp::~wxApp()
 160 {
 161     wxApp::SetInstance(NULL);
 162 }
 163
 164 int wxApp::MainLoop()
 165 {
 166     /*
 167     * Sit around forever waiting to process X-events. Property Change
 168     * event are handled special, because they have to refer to
 169     * the root window rather than to a widget. therefore we can't
 170     * use an Xt-eventhandler.
 171     */
 172
 173     XSelectInput(XtDisplay((Widget) wxTheApp->GetTopLevelWidget()),
 174         XDefaultRootWindow(XtDisplay((Widget) wxTheApp->GetTopLevelWidget())),
 175         PropertyChangeMask);
 176
 177     m_mainLoop->Run();
 178
 179     return 0;
 180 }
 181
 182 // This should be redefined in a derived class for
 183 // handling property change events for XAtom IPC.
 184 void wxApp::HandlePropertyChange(WXEvent *event)
 185 {
 186     // by default do nothing special
 187     XtDispatchEvent((XEvent*) event); /* let Motif do the work */
 188 }
 189
 190 static char *fallbackResources[] = {
 191     // better defaults for CDE under Irix
 192     //
 193     // TODO: do something similar for the other systems, the hardcoded defaults
 194     //       below are ugly
 195 #ifdef __SGI__
 196     wxMOTIF_STR("*sgiMode: True"),
 197     wxMOTIF_STR("*useSchemes: all"),
 198 #else // !__SGI__
 199     wxMOTIF_STR("*menuBar.marginHeight: 0"),
 200     wxMOTIF_STR("*menuBar.shadowThickness: 1"),
 201     wxMOTIF_STR("*background: #c0c0c0"),
 202     wxMOTIF_STR("*foreground: black"),
 203 #endif // __SGI__/!__SGI__
 204     NULL
 205 };
 206
 207 // Create an application context
 208 bool wxApp::OnInitGui()
 209 {
 210     if( !wxAppBase::OnInitGui() )
 211         return false;
 212
 213 #ifdef __HPUX__
 214     // under HP-UX creating XmFontSet fails when the system locale is C and
 215     // we're using a remote DISPLAY, presumably because HP-UX uses its own
 216     // names for C and ISO locales (roman8 and iso8859n respectively) and so
 217     // its Motif libraries have troubles with non-HP X server
 218     //
 219     // whatever the reason, the fact is that without this hack any wxMotif
 220     // program crashes on startup because it can't create any font (HP programs
 221     // still work but they do spit out messages about failing to create font
 222     // sets and failing back on "fixed" font too)
 223     //
 224     // notice that calling setlocale() here is not enough because X(m) init
 225     // functions call setlocale() later so we really have to change environment
 226     bool fixAll = false; // tweak LC_ALL (or just LC_CTYPE)?
 227     const char *loc = getenv("LC_CTYPE");
 228     if ( !loc )
 229     {
 230         loc = getenv("LC_ALL");
 231         if ( loc )
 232             fixAll = true;
 233     }
 234
 235     if ( !loc ||
 236             (loc[0] == 'C' && loc[1] == '\0') ||
 237                 strcmp(loc, "POSIX") == 0 )
 238     {
 239         // we're using C locale, "fix" it
 240         wxLogDebug(_T("HP-UX fontset hack: forcing locale to en_US.iso88591"));
 241         putenv(fixAll ? "LC_ALL=en_US.iso88591" : "LC_CTYPE=en_US.iso88591");
 242     }
 243 #endif // __HPUX__
 244
 245     XtSetLanguageProc(NULL, NULL, NULL);
 246     XtToolkitInitialize() ;
 247     wxTheApp->m_appContext = (WXAppContext) XtCreateApplicationContext();
 248     XtAppSetFallbackResources((XtAppContext) wxTheApp->m_appContext, fallbackResources);
 249
 250     Display *dpy = XtOpenDisplay((XtAppContext) wxTheApp->m_appContext,(String)NULL,NULL,
 251         wxTheApp->GetClassName().c_str(), NULL, 0,
 252 # if XtSpecificationRelease < 5
 253         (Cardinal*) &argc,
 254 # else
 255         &argc,
 256 # endif
 257         argv);
 258
 259     if (!dpy) {
 260          // if you don't log to stderr, nothing will be shown...
 261         delete wxLog::SetActiveTarget(new wxLogStderr);
 262         wxString className(wxTheApp->GetClassName());
 263         wxLogError(_("wxWidgets could not open display for '%s': exiting."),
 264                    className.c_str());
 265         exit(-1);
 266     }
 267     m_initialDisplay = (WXDisplay*) dpy;
 268
 269 #ifdef __WXDEBUG__
 270     // install the X error handler
 271     gs_pfnXErrorHandler = XSetErrorHandler(wxXErrorHandler);
 272 #endif // __WXDEBUG__
 273
 274     // Add general resize proc
 275     XtActionsRec rec;
 276     rec.string = wxMOTIF_STR("resize");
 277     rec.proc = (XtActionProc)wxWidgetResizeProc;
 278     XtAppAddActions((XtAppContext) wxTheApp->m_appContext, &rec, 1);
 279
 280     GetMainColormap(dpy);
 281
 282     wxAddIdleCallback();
 283
 284     return true;
 285 }
 286
 287 WXColormap wxApp::GetMainColormap(WXDisplay* display)
 288 {
 289     if (!display) /* Must be called first with non-NULL display */
 290         return m_mainColormap;
 291
 292     int defaultScreen = DefaultScreen((Display*) display);
 293     Screen* screen = XScreenOfDisplay((Display*) display, defaultScreen);
 294
 295     Colormap c = DefaultColormapOfScreen(screen);
 296
 297     if (!m_mainColormap)
 298         m_mainColormap = (WXColormap) c;
 299
 300     return (WXColormap) c;
 301 }
 302
 303 static inline wxPerDisplayData& GetOrCreatePerDisplayData
 304     ( wxPerDisplayDataMap& m, WXDisplay* display )
 305 {
 306     wxPerDisplayDataMap::iterator it = m.find( display );
 307     if( it != m.end() && it->second != NULL )
 308         return *(it->second);
 309
 310     wxPerDisplayData* nData = new wxPerDisplayData();
 311     m[display] = nData;
 312
 313     return *nData;
 314 }
 315
 316 wxXVisualInfo* wxApp::GetVisualInfo( WXDisplay* display )
 317 {
 318     wxPerDisplayData& data = GetOrCreatePerDisplayData( *m_perDisplayData,
 319                                                         display );
 320     if( data.m_visualInfo )
 321         return data.m_visualInfo;
 322
 323     wxXVisualInfo* vi = new wxXVisualInfo;
 324     wxFillXVisualInfo( vi, (Display*)display );
 325
 326     data.m_visualInfo = vi;
 327
 328     return vi;
 329 }
 330
 331 static void wxTLWidgetDestroyCallback(Widget w, XtPointer WXUNUSED(clientData),
 332                                       XtPointer WXUNUSED(ptr))
 333 {
 334     if( wxTheApp )
 335     {
 336         wxTheApp->SetTopLevelWidget( (WXDisplay*)XtDisplay(w),
 337                                      (WXWidget)NULL );
 338         wxTheApp->SetTopLevelRealizedWidget( (WXDisplay*)XtDisplay(w),
 339                                              (WXWidget)NULL );
 340     }
 341 }
 342
 343 WXWidget wxCreateTopLevelWidget( WXDisplay* display )
 344 {
 345     Widget tlw = XtAppCreateShell( (String)NULL,
 346                                    wxTheApp->GetClassName().c_str(),
 347                                    applicationShellWidgetClass,
 348                                    (Display*)display,
 349                                    NULL, 0 );
 350     XtVaSetValues( tlw,
 351                    XmNoverrideRedirect, True,
 352                    NULL );
 353
 354     XtAddCallback( tlw, XmNdestroyCallback,
 355                    (XtCallbackProc)wxTLWidgetDestroyCallback,
 356                    (XtPointer)NULL );
 357
 358     return (WXWidget)tlw;
 359 }
 360
 361 WXWidget wxCreateTopLevelRealizedWidget( WXDisplay* WXUNUSED(display) )
 362 {
 363     Widget rTlw = XtVaCreateWidget( "dummy_widget", topLevelShellWidgetClass,
 364                                     (Widget)wxTheApp->GetTopLevelWidget(),
 365                                      NULL, 0 );
 366     XtSetMappedWhenManaged( rTlw, False );
 367     XtRealizeWidget( rTlw );
 368
 369     return (WXWidget)rTlw;
 370 }
 371
 372 WXWidget wxApp::GetTopLevelWidget()
 373 {
 374     WXDisplay* display = wxGetDisplay();
 375     wxPerDisplayData& data = GetOrCreatePerDisplayData( *m_perDisplayData,
 376                                                         display );
 377     if( data.m_topLevelWidget )
 378         return (WXWidget)data.m_topLevelWidget;
 379
 380     WXWidget tlw = wxCreateTopLevelWidget( display );
 381     SetTopLevelWidget( display, tlw );
 382
 383     return tlw;
 384 }
 385
 386 WXWidget wxApp::GetTopLevelRealizedWidget()
 387 {
 388     WXDisplay* display = wxGetDisplay();
 389     wxPerDisplayDataMap::iterator it = m_perDisplayData->find( display );
 390
 391     if( it != m_perDisplayData->end() && it->second->m_topLevelRealizedWidget )
 392         return (WXWidget)it->second->m_topLevelRealizedWidget;
 393
 394     WXWidget rTlw = wxCreateTopLevelRealizedWidget( display );
 395     SetTopLevelRealizedWidget( display, rTlw );
 396
 397     return rTlw;
 398 }
 399
 400 void wxApp::SetTopLevelWidget(WXDisplay* display, WXWidget widget)
 401 {
 402     GetOrCreatePerDisplayData( *m_perDisplayData, display )
 403         .m_topLevelWidget = (Widget)widget;
 404 }
 405
 406 void wxApp::SetTopLevelRealizedWidget(WXDisplay* display, WXWidget widget)
 407 {
 408     GetOrCreatePerDisplayData( *m_perDisplayData, display )
 409         .m_topLevelRealizedWidget = (Widget)widget;
 410 }
 411
 412 // Yield to other processes
 413
 414 bool wxApp::Yield(bool onlyIfNeeded)
 415 {
 416     static bool s_inYield = false;
 417
 418     if ( s_inYield )
 419     {
 420         if ( !onlyIfNeeded )
 421         {
 422             wxFAIL_MSG( wxT("wxYield called recursively" ) );
 423         }
 424
 425         return false;
 426     }
 427
 428     s_inYield = true;
 429
 430     while (wxTheApp && wxTheApp->Pending())
 431         wxTheApp->Dispatch();
 432
 433     s_inYield = false;
 434
 435     return true;
 436 }
 437
 438 // ----------------------------------------------------------------------------
 439 // accessors for C modules
 440 // ----------------------------------------------------------------------------
 441
 442 extern "C" XtAppContext wxGetAppContext()
 443 {
 444     return (XtAppContext)wxTheApp->GetAppContext();
 445 }