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
  22 #ifndef WX_PRECOMP
  23     #include "wx/hash.h"
  24     #include "wx/intl.h"
  25     #include "wx/log.h"
  26     #include "wx/utils.h"
  27     #include "wx/memory.h"
  28     #include "wx/module.h"
  29 #endif
  30
  31 #include "wx/evtloop.h"
  32
  33 #if wxUSE_THREADS
  34     #include "wx/thread.h"
  35 #endif
  36
  37 #ifdef __VMS__
  38     #pragma message disable nosimpint
  39 #endif
  40 #include <Xm/Xm.h>
  41 #include <X11/Xlib.h>
  42 #include <X11/Xutil.h>
  43 #include <X11/Xresource.h>
  44 #include <X11/Xatom.h>
  45 #ifdef __VMS__
  46     #pragma message enable nosimpint
  47 #endif
  48
  49 #include "wx/motif/private.h"
  50
  51 #include <string.h>
  52
  53 struct wxPerDisplayData
  54 {
  55     wxPerDisplayData()
  56     {
  57         m_visualInfo = NULL;
  58         m_topLevelWidget = NULL;
  59         m_topLevelRealizedWidget = NULL;
  60     }
  61
  62     wxXVisualInfo* m_visualInfo;
  63     Widget         m_topLevelWidget, m_topLevelRealizedWidget;
  64 };
  65
  66 static void wxTLWidgetDestroyCallback(Widget w, XtPointer clientData,
  67                                       XtPointer ptr);
  68 static WXWidget wxCreateTopLevelWidget( WXDisplay* display );
  69
  70 extern bool wxAddIdleCallback();
  71
  72 wxHashTable *wxWidgetHashTable = NULL;
  73
  74 IMPLEMENT_DYNAMIC_CLASS(wxApp, wxEvtHandler)
  75
  76 BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
  77     EVT_IDLE(wxAppBase::OnIdle)
  78 END_EVENT_TABLE()
  79
  80 #ifdef __WXDEBUG__
  81 extern "C"
  82 {
  83     typedef int (*XErrorHandlerFunc)(Display *, XErrorEvent *);
  84 }
  85
  86 XErrorHandlerFunc gs_pfnXErrorHandler = 0;
  87
  88 extern "C"
  89 {
  90
  91 static int wxXErrorHandler(Display *dpy, XErrorEvent *xevent)
  92 {
  93     // just forward to the default handler for now
  94     return gs_pfnXErrorHandler(dpy, xevent);
  95 }
  96
  97 }
  98 #endif // __WXDEBUG__
  99
 100 bool wxApp::Initialize(int& argcOrig, wxChar **argvOrig)
 101 {
 102     if ( !wxAppBase::Initialize(argcOrig, argvOrig) )
 103         return false;
 104
 105     wxWidgetHashTable = new wxHashTable(wxKEY_INTEGER);
 106
 107 #if wxUSE_INTL
 108     wxFont::SetDefaultEncoding(wxLocale::GetSystemEncoding());
 109 #endif
 110
 111     return true;
 112 }
 113
 114 void wxApp::CleanUp()
 115 {
 116     wxAppBase::CleanUp();
 117
 118     delete wxWidgetHashTable;
 119     wxWidgetHashTable = NULL;
 120
 121     delete m_mainLoop;
 122
 123     for( wxPerDisplayDataMap::iterator it  = m_perDisplayData->begin(),
 124                                        end = m_perDisplayData->end();
 125          it != end; ++it )
 126     {
 127         delete it->second->m_visualInfo;
 128         // On Solaris 10 calling XtDestroyWidget on the top level widget
 129         // dumps core if the locale is set to something other than "C"
 130 #ifndef __SUN__
 131         XtDestroyWidget( it->second->m_topLevelWidget );
 132 #endif
 133         delete it->second;
 134     }
 135
 136     delete m_perDisplayData;
 137 }
 138
 139 void wxApp::Exit()
 140 {
 141     wxApp::CleanUp();
 142
 143     wxAppConsole::Exit();
 144 }
 145
 146 // ============================================================================
 147 // wxApp
 148 // ============================================================================
 149
 150 wxApp::wxApp()
 151 {
 152     argc = 0;
 153     argv = NULL;
 154
 155     m_mainLoop = new wxEventLoop;
 156     m_mainColormap = (WXColormap) NULL;
 157     m_appContext = (WXAppContext) NULL;
 158     m_initialDisplay = (WXDisplay*) 0;
 159     m_perDisplayData = new wxPerDisplayDataMap;
 160 }
 161
 162 wxApp::~wxApp()
 163 {
 164     wxApp::SetInstance(NULL);
 165 }
 166
 167 int wxApp::MainLoop()
 168 {
 169     /*
 170     * Sit around forever waiting to process X-events. Property Change
 171     * event are handled special, because they have to refer to
 172     * the root window rather than to a widget. therefore we can't
 173     * use an Xt-eventhandler.
 174     */
 175
 176     XSelectInput(XtDisplay((Widget) wxTheApp->GetTopLevelWidget()),
 177         XDefaultRootWindow(XtDisplay((Widget) wxTheApp->GetTopLevelWidget())),
 178         PropertyChangeMask);
 179
 180     m_mainLoop->Run();
 181
 182     return 0;
 183 }
 184
 185 // This should be redefined in a derived class for
 186 // handling property change events for XAtom IPC.
 187 void wxApp::HandlePropertyChange(WXEvent *event)
 188 {
 189     // by default do nothing special
 190     XtDispatchEvent((XEvent*) event); /* let Motif do the work */
 191 }
 192
 193 static char *fallbackResources[] = {
 194     // better defaults for CDE under Irix
 195     //
 196     // TODO: do something similar for the other systems, the hardcoded defaults
 197     //       below are ugly
 198 #ifdef __SGI__
 199     wxMOTIF_STR("*sgiMode: True"),
 200     wxMOTIF_STR("*useSchemes: all"),
 201 #else // !__SGI__
 202     wxMOTIF_STR("*menuBar.marginHeight: 0"),
 203     wxMOTIF_STR("*menuBar.shadowThickness: 1"),
 204     wxMOTIF_STR("*background: #c0c0c0"),
 205     wxMOTIF_STR("*foreground: black"),
 206 #endif // __SGI__/!__SGI__
 207     NULL
 208 };
 209
 210 // Create an application context
 211 bool wxApp::OnInitGui()
 212 {
 213     if( !wxAppBase::OnInitGui() )
 214         return false;
 215
 216 #ifdef __HPUX__
 217     // under HP-UX creating XmFontSet fails when the system locale is C and
 218     // we're using a remote DISPLAY, presumably because HP-UX uses its own
 219     // names for C and ISO locales (roman8 and iso8859n respectively) and so
 220     // its Motif libraries have troubles with non-HP X server
 221     //
 222     // whatever the reason, the fact is that without this hack any wxMotif
 223     // program crashes on startup because it can't create any font (HP programs
 224     // still work but they do spit out messages about failing to create font
 225     // sets and failing back on "fixed" font too)
 226     //
 227     // notice that calling setlocale() here is not enough because X(m) init
 228     // functions call setlocale() later so we really have to change environment
 229     bool fixAll = false; // tweak LC_ALL (or just LC_CTYPE)?
 230     const char *loc = getenv("LC_CTYPE");
 231     if ( !loc )
 232     {
 233         loc = getenv("LC_ALL");
 234         if ( loc )
 235             fixAll = true;
 236     }
 237
 238     if ( !loc ||
 239             (loc[0] == 'C' && loc[1] == '\0') ||
 240                 strcmp(loc, "POSIX") == 0 )
 241     {
 242         // we're using C locale, "fix" it
 243         wxLogDebug(_T("HP-UX fontset hack: forcing locale to en_US.iso88591"));
 244         putenv(fixAll ? "LC_ALL=en_US.iso88591" : "LC_CTYPE=en_US.iso88591");
 245     }
 246 #endif // __HPUX__
 247
 248     XtSetLanguageProc(NULL, NULL, NULL);
 249     XtToolkitInitialize() ;
 250     wxTheApp->m_appContext = (WXAppContext) XtCreateApplicationContext();
 251     XtAppSetFallbackResources((XtAppContext) wxTheApp->m_appContext, fallbackResources);
 252
 253     // we shouldn't pass empty application/class name as it results in
 254     // immediate crash inside XOpenIM() (if XIM is used) under IRIX
 255     wxString appname = wxTheApp->GetAppName();
 256     if ( appname.empty() )
 257         appname = _T("wxapp");
 258     wxString clsname = wxTheApp->GetClassName();
 259     if ( clsname.empty() )
 260         clsname = _T("wx");
 261
 262     Display *dpy = XtOpenDisplay((XtAppContext) wxTheApp->m_appContext,
 263         (String)NULL,
 264         appname.c_str(),
 265         clsname.c_str(),
 266         NULL, 0,    // no options
 267 # if XtSpecificationRelease < 5
 268         (Cardinal*) &argc,
 269 # else
 270         &argc,
 271 # endif
 272         argv);
 273
 274     if (!dpy) {
 275          // if you don't log to stderr, nothing will be shown...
 276         delete wxLog::SetActiveTarget(new wxLogStderr);
 277         wxString className(wxTheApp->GetClassName());
 278         wxLogError(_("wxWidgets could not open display for '%s': exiting."),
 279                    className.c_str());
 280         exit(-1);
 281     }
 282     m_initialDisplay = (WXDisplay*) dpy;
 283
 284 #ifdef __WXDEBUG__
 285     // install the X error handler
 286     gs_pfnXErrorHandler = XSetErrorHandler(wxXErrorHandler);
 287 #endif // __WXDEBUG__
 288
 289     // Add general resize proc
 290     XtActionsRec rec;
 291     rec.string = wxMOTIF_STR("resize");
 292     rec.proc = (XtActionProc)wxWidgetResizeProc;
 293     XtAppAddActions((XtAppContext) wxTheApp->m_appContext, &rec, 1);
 294
 295     GetMainColormap(dpy);
 296
 297     wxAddIdleCallback();
 298
 299     return true;
 300 }
 301
 302 WXColormap wxApp::GetMainColormap(WXDisplay* display)
 303 {
 304     if (!display) /* Must be called first with non-NULL display */
 305         return m_mainColormap;
 306
 307     int defaultScreen = DefaultScreen((Display*) display);
 308     Screen* screen = XScreenOfDisplay((Display*) display, defaultScreen);
 309
 310     Colormap c = DefaultColormapOfScreen(screen);
 311
 312     if (!m_mainColormap)
 313         m_mainColormap = (WXColormap) c;
 314
 315     return (WXColormap) c;
 316 }
 317
 318 static inline wxPerDisplayData& GetOrCreatePerDisplayData
 319     ( wxPerDisplayDataMap& m, WXDisplay* display )
 320 {
 321     wxPerDisplayDataMap::iterator it = m.find( display );
 322     if( it != m.end() && it->second != NULL )
 323         return *(it->second);
 324
 325     wxPerDisplayData* nData = new wxPerDisplayData();
 326     m[display] = nData;
 327
 328     return *nData;
 329 }
 330
 331 wxXVisualInfo* wxApp::GetVisualInfo( WXDisplay* display )
 332 {
 333     wxPerDisplayData& data = GetOrCreatePerDisplayData( *m_perDisplayData,
 334                                                         display );
 335     if( data.m_visualInfo )
 336         return data.m_visualInfo;
 337
 338     wxXVisualInfo* vi = new wxXVisualInfo;
 339     wxFillXVisualInfo( vi, (Display*)display );
 340
 341     data.m_visualInfo = vi;
 342
 343     return vi;
 344 }
 345
 346 static void wxTLWidgetDestroyCallback(Widget w, XtPointer WXUNUSED(clientData),
 347                                       XtPointer WXUNUSED(ptr))
 348 {
 349     if( wxTheApp )
 350     {
 351         wxTheApp->SetTopLevelWidget( (WXDisplay*)XtDisplay(w),
 352                                      (WXWidget)NULL );
 353         wxTheApp->SetTopLevelRealizedWidget( (WXDisplay*)XtDisplay(w),
 354                                              (WXWidget)NULL );
 355     }
 356 }
 357
 358 WXWidget wxCreateTopLevelWidget( WXDisplay* display )
 359 {
 360     Widget tlw = XtAppCreateShell( (String)NULL,
 361                                    wxTheApp->GetClassName().c_str(),
 362                                    applicationShellWidgetClass,
 363                                    (Display*)display,
 364                                    NULL, 0 );
 365     XtVaSetValues( tlw,
 366                    XmNoverrideRedirect, True,
 367                    NULL );
 368
 369     XtAddCallback( tlw, XmNdestroyCallback,
 370                    (XtCallbackProc)wxTLWidgetDestroyCallback,
 371                    (XtPointer)NULL );
 372
 373     return (WXWidget)tlw;
 374 }
 375
 376 WXWidget wxCreateTopLevelRealizedWidget( WXDisplay* WXUNUSED(display) )
 377 {
 378     Widget rTlw = XtVaCreateWidget( "dummy_widget", topLevelShellWidgetClass,
 379                                     (Widget)wxTheApp->GetTopLevelWidget(),
 380                                      NULL );
 381     XtSetMappedWhenManaged( rTlw, False );
 382     XtRealizeWidget( rTlw );
 383
 384     return (WXWidget)rTlw;
 385 }
 386
 387 WXWidget wxApp::GetTopLevelWidget()
 388 {
 389     WXDisplay* display = wxGetDisplay();
 390     wxPerDisplayData& data = GetOrCreatePerDisplayData( *m_perDisplayData,
 391                                                         display );
 392     if( data.m_topLevelWidget )
 393         return (WXWidget)data.m_topLevelWidget;
 394
 395     WXWidget tlw = wxCreateTopLevelWidget( display );
 396     SetTopLevelWidget( display, tlw );
 397
 398     return tlw;
 399 }
 400
 401 WXWidget wxApp::GetTopLevelRealizedWidget()
 402 {
 403     WXDisplay* display = wxGetDisplay();
 404     wxPerDisplayDataMap::iterator it = m_perDisplayData->find( display );
 405
 406     if( it != m_perDisplayData->end() && it->second->m_topLevelRealizedWidget )
 407         return (WXWidget)it->second->m_topLevelRealizedWidget;
 408
 409     WXWidget rTlw = wxCreateTopLevelRealizedWidget( display );
 410     SetTopLevelRealizedWidget( display, rTlw );
 411
 412     return rTlw;
 413 }
 414
 415 void wxApp::SetTopLevelWidget(WXDisplay* display, WXWidget widget)
 416 {
 417     GetOrCreatePerDisplayData( *m_perDisplayData, display )
 418         .m_topLevelWidget = (Widget)widget;
 419 }
 420
 421 void wxApp::SetTopLevelRealizedWidget(WXDisplay* display, WXWidget widget)
 422 {
 423     GetOrCreatePerDisplayData( *m_perDisplayData, display )
 424         .m_topLevelRealizedWidget = (Widget)widget;
 425 }
 426
 427 // Yield to other processes
 428
 429 bool wxApp::Yield(bool onlyIfNeeded)
 430 {
 431     static bool s_inYield = false;
 432
 433     if ( s_inYield )
 434     {
 435         if ( !onlyIfNeeded )
 436         {
 437             wxFAIL_MSG( wxT("wxYield called recursively" ) );
 438         }
 439
 440         return false;
 441     }
 442
 443     s_inYield = true;
 444
 445     while (wxTheApp && wxTheApp->Pending())
 446         wxTheApp->Dispatch();
 447
 448     s_inYield = false;
 449
 450     return true;
 451 }
 452
 453 // ----------------------------------------------------------------------------
 454 // accessors for C modules
 455 // ----------------------------------------------------------------------------
 456
 457 extern "C" XtAppContext wxGetAppContext()
 458 {
 459     return (XtAppContext)wxTheApp->GetAppContext();
 460 }