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 void wxApp::ExitMainLoop()
 174 {
 175     if( m_eventLoop->IsRunning() )
 176         m_eventLoop->Exit();
 177 }
 178
 179 // Is a message/event pending?
 180 bool wxApp::Pending()
 181 {
 182     return m_eventLoop->Pending();
 183 #if 0
 184     XFlush(XtDisplay( (Widget) wxTheApp->GetTopLevelWidget() ));
 185
 186     // Fix by Doug from STI, to prevent a stall if non-X event
 187     // is found.
 188     return ((XtAppPending( (XtAppContext) GetAppContext() ) & XtIMXEvent) != 0) ;
 189 #endif
 190 }
 191
 192 // Dispatch a message.
 193 void wxApp::Dispatch()
 194 {
 195     m_eventLoop->Dispatch();
 196 }
 197
 198 // This should be redefined in a derived class for
 199 // handling property change events for XAtom IPC.
 200 void wxApp::HandlePropertyChange(WXEvent *event)
 201 {
 202     // by default do nothing special
 203     XtDispatchEvent((XEvent*) event); /* let Motif do the work */
 204 }
 205
 206 void wxApp::OnIdle(wxIdleEvent& event)
 207 {
 208     static bool inOnIdle = FALSE;
 209
 210     // Avoid recursion (via ProcessEvent default case)
 211     if (inOnIdle)
 212         return;
 213
 214     inOnIdle = TRUE;
 215
 216     // If there are pending events, we must process them: pending events
 217     // are either events to the threads other than main or events posted
 218     // with wxPostEvent() functions
 219     // GRG: I have moved this here so that all pending events are processed
 220     //   before starting to delete any objects. This behaves better (in
 221     //   particular, wrt wxPostEvent) and is coherent with wxGTK's current
 222     //   behaviour. Also removed the '#if wxUSE_THREADS' around it.
 223     //  Changed Mar/2000 before 2.1.14
 224
 225     // Flush pending events.
 226     ProcessPendingEvents();
 227
 228     // 'Garbage' collection of windows deleted with Close().
 229     DeletePendingObjects();
 230
 231     // flush the logged messages if any
 232     wxLog *pLog = wxLog::GetActiveTarget();
 233     if ( pLog != NULL && pLog->HasPendingMessages() )
 234         pLog->Flush();
 235
 236     // Send OnIdle events to all windows
 237     bool needMore = SendIdleEvents();
 238
 239     if (needMore)
 240         event.RequestMore(TRUE);
 241
 242     inOnIdle = FALSE;
 243 }
 244
 245 static char *fallbackResources[] = {
 246     "*menuBar.marginHeight: 0",
 247     "*menuBar.shadowThickness: 1",
 248     "*background: #c0c0c0",
 249     "*foreground: black",
 250     NULL
 251 };
 252
 253 // Create an application context
 254 bool wxApp::OnInitGui()
 255 {
 256     if( !wxAppBase::OnInitGui() )
 257         return FALSE;
 258
 259     XtToolkitInitialize() ;
 260     wxTheApp->m_appContext = (WXAppContext) XtCreateApplicationContext();
 261     XtAppSetFallbackResources((XtAppContext) wxTheApp->m_appContext, fallbackResources);
 262
 263     Display *dpy = XtOpenDisplay((XtAppContext) wxTheApp->m_appContext,(String)NULL,NULL,
 264         wxTheApp->GetClassName().c_str(), NULL, 0,
 265 # if XtSpecificationRelease < 5
 266         (Cardinal*) &argc,
 267 # else
 268         &argc,
 269 # endif
 270         argv);
 271
 272     if (!dpy) {
 273          // if you don't log to stderr, nothing will be shown...
 274         delete wxLog::SetActiveTarget(new wxLogStderr);
 275         wxString className(wxTheApp->GetClassName());
 276         wxLogError(_("wxWindows could not open display for '%s': exiting."),
 277                    className.c_str());
 278         exit(-1);
 279     }
 280     m_initialDisplay = (WXDisplay*) dpy;
 281
 282 #ifdef __WXDEBUG__
 283     // install the X error handler
 284     gs_pfnXErrorHandler = XSetErrorHandler(wxXErrorHandler);
 285 #endif // __WXDEBUG__
 286
 287     // Add general resize proc
 288     XtActionsRec rec;
 289     rec.string = "resize";
 290     rec.proc = (XtActionProc)wxWidgetResizeProc;
 291     XtAppAddActions((XtAppContext) wxTheApp->m_appContext, &rec, 1);
 292
 293     GetMainColormap(dpy);
 294
 295     wxAddIdleCallback();
 296
 297     return TRUE;
 298 }
 299
 300 WXColormap wxApp::GetMainColormap(WXDisplay* display)
 301 {
 302     if (!display) /* Must be called first with non-NULL display */
 303         return m_mainColormap;
 304
 305     int defaultScreen = DefaultScreen((Display*) display);
 306     Screen* screen = XScreenOfDisplay((Display*) display, defaultScreen);
 307
 308     Colormap c = DefaultColormapOfScreen(screen);
 309
 310     if (!m_mainColormap)
 311         m_mainColormap = (WXColormap) c;
 312
 313     return (WXColormap) c;
 314 }
 315
 316 wxXVisualInfo* wxApp::GetVisualInfo( WXDisplay* display )
 317 {
 318     wxPerDisplayDataMap::iterator it = m_perDisplayData->find( display );
 319
 320     if( it != m_perDisplayData->end() && it->second.m_visualInfo )
 321         return it->second.m_visualInfo;
 322
 323     wxXVisualInfo* vi = new wxXVisualInfo;
 324     wxFillXVisualInfo( vi, (Display*)display );
 325
 326     (*m_perDisplayData)[display].m_visualInfo = vi;
 327
 328     return vi;
 329 }
 330
 331 static void wxTLWidgetDestroyCallback(Widget w, XtPointer clientData,
 332                                       XtPointer ptr)
 333 {
 334     if( wxTheApp )
 335         wxTheApp->SetTopLevelWidget( (WXDisplay*)XtDisplay(w),
 336                                      (WXWidget)NULL );
 337 }
 338
 339 WXWidget wxCreateTopLevelWidget( WXDisplay* display )
 340 {
 341     Widget tlw = XtAppCreateShell( (String)NULL,
 342                                    wxTheApp->GetClassName().c_str(),
 343                                    applicationShellWidgetClass,
 344                                    (Display*)display,
 345                                    NULL, 0 );
 346     XtSetMappedWhenManaged( tlw, False );
 347     XtRealizeWidget( tlw );
 348
 349     XtAddCallback( tlw, XmNdestroyCallback,
 350                    (XtCallbackProc)wxTLWidgetDestroyCallback,
 351                    (XtPointer)NULL );
 352
 353     return (WXWidget)tlw;
 354 }
 355
 356 WXWidget wxApp::GetTopLevelWidget()
 357 {
 358     WXDisplay* display = wxGetDisplay();
 359     wxPerDisplayDataMap::iterator it = m_perDisplayData->find( display );
 360
 361     if( it != m_perDisplayData->end() && it->second.m_topLevelWidget )
 362         return (WXWidget)it->second.m_topLevelWidget;
 363
 364     WXWidget tlw = wxCreateTopLevelWidget( display );
 365     SetTopLevelWidget( display, tlw );
 366
 367     return tlw;
 368 }
 369
 370 void wxApp::SetTopLevelWidget(WXDisplay* display, WXWidget widget)
 371 {
 372     (*m_perDisplayData)[display].m_topLevelWidget = (Widget)widget;
 373 }
 374
 375 // Yield to other processes
 376
 377 bool wxApp::Yield(bool onlyIfNeeded)
 378 {
 379     bool s_inYield = FALSE;
 380
 381     if ( s_inYield )
 382     {
 383         if ( !onlyIfNeeded )
 384         {
 385             wxFAIL_MSG( wxT("wxYield called recursively" ) );
 386         }
 387
 388         return FALSE;
 389     }
 390
 391     s_inYield = TRUE;
 392
 393     while (wxTheApp && wxTheApp->Pending())
 394         wxTheApp->Dispatch();
 395
 396     s_inYield = FALSE;
 397
 398     return TRUE;
 399 }
 400
 401 // ----------------------------------------------------------------------------
 402 // accessors for C modules
 403 // ----------------------------------------------------------------------------
 404
 405 extern "C" XtAppContext wxGetAppContext()
 406 {
 407     return (XtAppContext)wxTheApp->GetAppContext();
 408 }