src/motif/app.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        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 #ifdef __GNUG__
  13     #pragma implementation "app.h"
  14 #endif
  15
  16 #ifdef __VMS
  17 #define XtParent XTPARENT
  18 #define XtDisplay XTDISPLAY
  19 #endif
  20
  21 #include "wx/app.h"
  22 #include "wx/utils.h"
  23 #include "wx/module.h"
  24 #include "wx/memory.h"
  25 #include "wx/log.h"
  26 #include "wx/intl.h"
  27 #include "wx/evtloop.h"
  28 #include "wx/hash.h"
  29 #include "wx/hashmap.h"
  30
  31 #if wxUSE_THREADS
  32     #include "wx/thread.h"
  33 #endif
  34
  35 #ifdef __VMS__
  36 #pragma message disable nosimpint
  37 #endif
  38 #include <Xm/Xm.h>
  39 #include <X11/Xlib.h>
  40 #include <X11/Xutil.h>
  41 #include <X11/Xresource.h>
  42 #include <X11/Xatom.h>
  43 #ifdef __VMS__
  44 #pragma message enable nosimpint
  45 #endif
  46
  47 #include "wx/motif/private.h"
  48
  49 #include <string.h>
  50
  51 struct wxPerDisplayData
  52 {
  53     wxPerDisplayData()
  54         { m_visualInfo = NULL; m_topLevelWidget = NULL; }
  55
  56     wxXVisualInfo* m_visualInfo;
  57     Widget         m_topLevelWidget;
  58 };
  59
  60 WX_DECLARE_VOIDPTR_HASH_MAP( wxPerDisplayData, wxPerDisplayDataMap );
  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(wxApp::OnIdle)
  75 END_EVENT_TABLE()
  76
  77 #ifdef __WXDEBUG__
  78     typedef int (*XErrorHandlerFunc)(Display *, XErrorEvent *);
  79
  80     XErrorHandlerFunc gs_pfnXErrorHandler = 0;
  81
  82     static int wxXErrorHandler(Display *dpy, XErrorEvent *xevent)
  83     {
  84         // just forward to the default handler for now
  85         return gs_pfnXErrorHandler(dpy, xevent);
  86     }
  87 #endif // __WXDEBUG__
  88
  89 bool wxApp::Initialize(int& argc, wxChar **argv)
  90 {
  91     if ( !wxAppBase::Initialize(argc, argv) )
  92         return false;
  93
  94     wxWidgetHashTable = new wxHashTable(wxKEY_INTEGER);
  95
  96     return true;
  97 }
  98
  99 void wxApp::CleanUp()
 100 {
 101     delete wxWidgetHashTable;
 102     wxWidgetHashTable = NULL;
 103
 104     wxAppBase::CleanUp();
 105 }
 106
 107 void wxApp::Exit()
 108 {
 109     wxApp::CleanUp();
 110
 111     wxAppConsole::Exit();
 112 }
 113
 114 // ============================================================================
 115 // wxApp
 116 // ============================================================================
 117
 118 wxApp::wxApp()
 119 {
 120     argc = 0;
 121     argv = NULL;
 122
 123     m_eventLoop = new wxEventLoop;
 124     m_mainColormap = (WXColormap) NULL;
 125     m_appContext = (WXAppContext) NULL;
 126     m_initialDisplay = (WXDisplay*) 0;
 127     m_perDisplayData = new wxPerDisplayDataMap;
 128 }
 129
 130 wxApp::~wxApp()
 131 {
 132     delete m_eventLoop;
 133
 134     for( wxPerDisplayDataMap::iterator it  = m_perDisplayData->begin(),
 135                                        end = m_perDisplayData->end();
 136          it != end; ++it )
 137     {
 138         delete it->second.m_visualInfo;
 139         XtDestroyWidget( it->second.m_topLevelWidget );
 140     }
 141
 142     delete m_perDisplayData;
 143
 144     wxTheApp = NULL;
 145 }
 146
 147 bool wxApp::Initialized()
 148 {
 149     if (GetTopWindow())
 150         return TRUE;
 151     else
 152         return FALSE;
 153 }
 154
 155 int wxApp::MainLoop()
 156 {
 157     /*
 158     * Sit around forever waiting to process X-events. Property Change
 159     * event are handled special, because they have to refer to
 160     * the root window rather than to a widget. therefore we can't
 161     * use an Xt-eventhandler.
 162     */
 163
 164     XSelectInput(XtDisplay((Widget) wxTheApp->GetTopLevelWidget()),
 165         XDefaultRootWindow(XtDisplay((Widget) wxTheApp->GetTopLevelWidget())),
 166         PropertyChangeMask);
 167
 168     m_eventLoop->Run();
 169
 170     return 0;
 171 }
 172
 173 // Processes an idle event.
 174 // Returns TRUE if more time is needed.
 175 bool wxApp::ProcessIdle()
 176 {
 177     wxIdleEvent event;
 178
 179     return ProcessEvent(event) && event.MoreRequested();
 180 }
 181
 182 void wxApp::ExitMainLoop()
 183 {
 184     if( m_eventLoop->IsRunning() )
 185         m_eventLoop->Exit();
 186 }
 187
 188 // Is a message/event pending?
 189 bool wxApp::Pending()
 190 {
 191     return m_eventLoop->Pending();
 192 #if 0
 193     XFlush(XtDisplay( (Widget) wxTheApp->GetTopLevelWidget() ));
 194
 195     // Fix by Doug from STI, to prevent a stall if non-X event
 196     // is found.
 197     return ((XtAppPending( (XtAppContext) GetAppContext() ) & XtIMXEvent) != 0) ;
 198 #endif
 199 }
 200
 201 // Dispatch a message.
 202 void wxApp::Dispatch()
 203 {
 204     m_eventLoop->Dispatch();
 205 }
 206
 207 // This should be redefined in a derived class for
 208 // handling property change events for XAtom IPC.
 209 void wxApp::HandlePropertyChange(WXEvent *event)
 210 {
 211     // by default do nothing special
 212     XtDispatchEvent((XEvent*) event); /* let Motif do the work */
 213 }
 214
 215 void wxApp::OnIdle(wxIdleEvent& event)
 216 {
 217     static bool inOnIdle = FALSE;
 218
 219     // Avoid recursion (via ProcessEvent default case)
 220     if (inOnIdle)
 221         return;
 222
 223     inOnIdle = TRUE;
 224
 225     // If there are pending events, we must process them: pending events
 226     // are either events to the threads other than main or events posted
 227     // with wxPostEvent() functions
 228     // GRG: I have moved this here so that all pending events are processed
 229     //   before starting to delete any objects. This behaves better (in
 230     //   particular, wrt wxPostEvent) and is coherent with wxGTK's current
 231     //   behaviour. Also removed the '#if wxUSE_THREADS' around it.
 232     //  Changed Mar/2000 before 2.1.14
 233
 234     // Flush pending events.
 235     ProcessPendingEvents();
 236
 237     // 'Garbage' collection of windows deleted with Close().
 238     DeletePendingObjects();
 239
 240     // flush the logged messages if any
 241     wxLog *pLog = wxLog::GetActiveTarget();
 242     if ( pLog != NULL && pLog->HasPendingMessages() )
 243         pLog->Flush();
 244
 245     // Send OnIdle events to all windows
 246     bool needMore = SendIdleEvents();
 247
 248     if (needMore)
 249         event.RequestMore(TRUE);
 250
 251     inOnIdle = FALSE;
 252 }
 253
 254 // Send idle event to all top-level windows
 255 bool wxApp::SendIdleEvents()
 256 {
 257     bool needMore = FALSE;
 258
 259     wxWindowList::Node* node = wxTopLevelWindows.GetFirst();
 260     while (node)
 261     {
 262         wxWindow* win = node->GetData();
 263         if (SendIdleEvents(win))
 264             needMore = TRUE;
 265         node = node->GetNext();
 266     }
 267
 268     return needMore;
 269 }
 270
 271 // Send idle event to window and all subwindows
 272 bool wxApp::SendIdleEvents(wxWindow* win)
 273 {
 274     bool needMore = FALSE;
 275
 276     wxIdleEvent event;
 277     event.SetEventObject(win);
 278     win->GetEventHandler()->ProcessEvent(event);
 279
 280     if (event.MoreRequested())
 281         needMore = TRUE;
 282
 283     wxWindowList::Node* node = win->GetChildren().GetFirst();
 284     while (node)
 285     {
 286         wxWindow* win = node->GetData();
 287         if (SendIdleEvents(win))
 288             needMore = TRUE;
 289
 290         node = node->GetNext();
 291     }
 292     return needMore ;
 293 }
 294
 295 static char *fallbackResources[] = {
 296     "*menuBar.marginHeight: 0",
 297     "*menuBar.shadowThickness: 1",
 298     "*background: #c0c0c0",
 299     "*foreground: black",
 300     NULL
 301 };
 302
 303 // Create an application context
 304 bool wxApp::OnInitGui()
 305 {
 306     if( !wxAppBase::OnInitGui() )
 307         return FALSE;
 308
 309     XtToolkitInitialize() ;
 310     wxTheApp->m_appContext = (WXAppContext) XtCreateApplicationContext();
 311     XtAppSetFallbackResources((XtAppContext) wxTheApp->m_appContext, fallbackResources);
 312
 313     Display *dpy = XtOpenDisplay((XtAppContext) wxTheApp->m_appContext,(String)NULL,NULL,
 314         wxTheApp->GetClassName().c_str(), NULL, 0,
 315 # if XtSpecificationRelease < 5
 316         (Cardinal*) &argc,
 317 # else
 318         &argc,
 319 # endif
 320         argv);
 321
 322     if (!dpy) {
 323          // if you don't log to stderr, nothing will be shown...
 324         delete wxLog::SetActiveTarget(new wxLogStderr);
 325         wxString className(wxTheApp->GetClassName());
 326         wxLogError(_("wxWindows could not open display for '%s': exiting."),
 327                    className.c_str());
 328         exit(-1);
 329     }
 330     m_initialDisplay = (WXDisplay*) dpy;
 331
 332 #ifdef __WXDEBUG__
 333     // install the X error handler
 334     gs_pfnXErrorHandler = XSetErrorHandler(wxXErrorHandler);
 335 #endif // __WXDEBUG__
 336
 337     // Add general resize proc
 338     XtActionsRec rec;
 339     rec.string = "resize";
 340     rec.proc = (XtActionProc)wxWidgetResizeProc;
 341     XtAppAddActions((XtAppContext) wxTheApp->m_appContext, &rec, 1);
 342
 343     GetMainColormap(dpy);
 344
 345     wxAddIdleCallback();
 346
 347     return TRUE;
 348 }
 349
 350 WXColormap wxApp::GetMainColormap(WXDisplay* display)
 351 {
 352     if (!display) /* Must be called first with non-NULL display */
 353         return m_mainColormap;
 354
 355     int defaultScreen = DefaultScreen((Display*) display);
 356     Screen* screen = XScreenOfDisplay((Display*) display, defaultScreen);
 357
 358     Colormap c = DefaultColormapOfScreen(screen);
 359
 360     if (!m_mainColormap)
 361         m_mainColormap = (WXColormap) c;
 362
 363     return (WXColormap) c;
 364 }
 365
 366 wxXVisualInfo* wxApp::GetVisualInfo( WXDisplay* display )
 367 {
 368     wxPerDisplayDataMap::iterator it = m_perDisplayData->find( display );
 369
 370     if( it != m_perDisplayData->end() && it->second.m_visualInfo )
 371         return it->second.m_visualInfo;
 372
 373     wxXVisualInfo* vi = new wxXVisualInfo;
 374     wxFillXVisualInfo( vi, (Display*)display );
 375
 376     (*m_perDisplayData)[display].m_visualInfo = vi;
 377
 378     return vi;
 379 }
 380
 381 static void wxTLWidgetDestroyCallback(Widget w, XtPointer clientData,
 382                                       XtPointer ptr)
 383 {
 384     if( wxTheApp )
 385         wxTheApp->SetTopLevelWidget( (WXDisplay*)XtDisplay(w),
 386                                      (WXWidget)NULL );
 387 }
 388
 389 WXWidget wxCreateTopLevelWidget( WXDisplay* display )
 390 {
 391     Widget tlw = XtAppCreateShell( (String)NULL,
 392                                    wxTheApp->GetClassName().c_str(),
 393                                    applicationShellWidgetClass,
 394                                    (Display*)display,
 395                                    NULL, 0 );
 396     XtSetMappedWhenManaged( tlw, False );
 397     XtRealizeWidget( tlw );
 398
 399     XtAddCallback( tlw, XmNdestroyCallback,
 400                    (XtCallbackProc)wxTLWidgetDestroyCallback,
 401                    (XtPointer)NULL );
 402
 403     return (WXWidget)tlw;
 404 }
 405
 406 WXWidget wxApp::GetTopLevelWidget()
 407 {
 408     WXDisplay* display = wxGetDisplay();
 409     wxPerDisplayDataMap::iterator it = m_perDisplayData->find( display );
 410
 411     if( it != m_perDisplayData->end() && it->second.m_topLevelWidget )
 412         return (WXWidget)it->second.m_topLevelWidget;
 413
 414     WXWidget tlw = wxCreateTopLevelWidget( display );
 415     SetTopLevelWidget( display, tlw );
 416
 417     return tlw;
 418 }
 419
 420 void wxApp::SetTopLevelWidget(WXDisplay* display, WXWidget widget)
 421 {
 422     (*m_perDisplayData)[display].m_topLevelWidget = (Widget)widget;
 423 }
 424
 425 // Yield to other processes
 426
 427 bool wxApp::Yield(bool onlyIfNeeded)
 428 {
 429     bool s_inYield = FALSE;
 430
 431     if ( s_inYield )
 432     {
 433         if ( !onlyIfNeeded )
 434         {
 435             wxFAIL_MSG( wxT("wxYield called recursively" ) );
 436         }
 437
 438         return FALSE;
 439     }
 440
 441     s_inYield = TRUE;
 442
 443     while (wxTheApp && wxTheApp->Pending())
 444         wxTheApp->Dispatch();
 445
 446     s_inYield = FALSE;
 447
 448     return TRUE;
 449 }
 450
 451 // ----------------------------------------------------------------------------
 452 // accessors for C modules
 453 // ----------------------------------------------------------------------------
 454
 455 extern "C" XtAppContext wxGetAppContext()
 456 {
 457     return (XtAppContext)wxTheApp->GetAppContext();
 458 }