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 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  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(wxAppBase::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     wxApp::SetInstance(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 static char *fallbackResources[] = {
 207     "*menuBar.marginHeight: 0",
 208     "*menuBar.shadowThickness: 1",
 209     "*background: #c0c0c0",
 210     "*foreground: black",
 211     NULL
 212 };
 213
 214 // Create an application context
 215 bool wxApp::OnInitGui()
 216 {
 217     if( !wxAppBase::OnInitGui() )
 218         return FALSE;
 219
 220     XtToolkitInitialize() ;
 221     wxTheApp->m_appContext = (WXAppContext) XtCreateApplicationContext();
 222     XtAppSetFallbackResources((XtAppContext) wxTheApp->m_appContext, fallbackResources);
 223
 224     Display *dpy = XtOpenDisplay((XtAppContext) wxTheApp->m_appContext,(String)NULL,NULL,
 225         wxTheApp->GetClassName().c_str(), NULL, 0,
 226 # if XtSpecificationRelease < 5
 227         (Cardinal*) &argc,
 228 # else
 229         &argc,
 230 # endif
 231         argv);
 232
 233     if (!dpy) {
 234          // if you don't log to stderr, nothing will be shown...
 235         delete wxLog::SetActiveTarget(new wxLogStderr);
 236         wxString className(wxTheApp->GetClassName());
 237         wxLogError(_("wxWindows could not open display for '%s': exiting."),
 238                    className.c_str());
 239         exit(-1);
 240     }
 241     m_initialDisplay = (WXDisplay*) dpy;
 242
 243 #ifdef __WXDEBUG__
 244     // install the X error handler
 245     gs_pfnXErrorHandler = XSetErrorHandler(wxXErrorHandler);
 246 #endif // __WXDEBUG__
 247
 248     // Add general resize proc
 249     XtActionsRec rec;
 250     rec.string = "resize";
 251     rec.proc = (XtActionProc)wxWidgetResizeProc;
 252     XtAppAddActions((XtAppContext) wxTheApp->m_appContext, &rec, 1);
 253
 254     GetMainColormap(dpy);
 255
 256     wxAddIdleCallback();
 257
 258     return TRUE;
 259 }
 260
 261 WXColormap wxApp::GetMainColormap(WXDisplay* display)
 262 {
 263     if (!display) /* Must be called first with non-NULL display */
 264         return m_mainColormap;
 265
 266     int defaultScreen = DefaultScreen((Display*) display);
 267     Screen* screen = XScreenOfDisplay((Display*) display, defaultScreen);
 268
 269     Colormap c = DefaultColormapOfScreen(screen);
 270
 271     if (!m_mainColormap)
 272         m_mainColormap = (WXColormap) c;
 273
 274     return (WXColormap) c;
 275 }
 276
 277 wxXVisualInfo* wxApp::GetVisualInfo( WXDisplay* display )
 278 {
 279     wxPerDisplayDataMap::iterator it = m_perDisplayData->find( display );
 280
 281     if( it != m_perDisplayData->end() && it->second.m_visualInfo )
 282         return it->second.m_visualInfo;
 283
 284     wxXVisualInfo* vi = new wxXVisualInfo;
 285     wxFillXVisualInfo( vi, (Display*)display );
 286
 287     (*m_perDisplayData)[display].m_visualInfo = vi;
 288
 289     return vi;
 290 }
 291
 292 static void wxTLWidgetDestroyCallback(Widget w, XtPointer clientData,
 293                                       XtPointer ptr)
 294 {
 295     if( wxTheApp )
 296         wxTheApp->SetTopLevelWidget( (WXDisplay*)XtDisplay(w),
 297                                      (WXWidget)NULL );
 298 }
 299
 300 WXWidget wxCreateTopLevelWidget( WXDisplay* display )
 301 {
 302     Widget tlw = XtAppCreateShell( (String)NULL,
 303                                    wxTheApp->GetClassName().c_str(),
 304                                    applicationShellWidgetClass,
 305                                    (Display*)display,
 306                                    NULL, 0 );
 307     XtSetMappedWhenManaged( tlw, False );
 308     XtRealizeWidget( tlw );
 309
 310     XtAddCallback( tlw, XmNdestroyCallback,
 311                    (XtCallbackProc)wxTLWidgetDestroyCallback,
 312                    (XtPointer)NULL );
 313
 314     return (WXWidget)tlw;
 315 }
 316
 317 WXWidget wxApp::GetTopLevelWidget()
 318 {
 319     WXDisplay* display = wxGetDisplay();
 320     wxPerDisplayDataMap::iterator it = m_perDisplayData->find( display );
 321
 322     if( it != m_perDisplayData->end() && it->second.m_topLevelWidget )
 323         return (WXWidget)it->second.m_topLevelWidget;
 324
 325     WXWidget tlw = wxCreateTopLevelWidget( display );
 326     SetTopLevelWidget( display, tlw );
 327
 328     return tlw;
 329 }
 330
 331 void wxApp::SetTopLevelWidget(WXDisplay* display, WXWidget widget)
 332 {
 333     (*m_perDisplayData)[display].m_topLevelWidget = (Widget)widget;
 334 }
 335
 336 // Yield to other processes
 337
 338 bool wxApp::Yield(bool onlyIfNeeded)
 339 {
 340     bool s_inYield = FALSE;
 341
 342     if ( s_inYield )
 343     {
 344         if ( !onlyIfNeeded )
 345         {
 346             wxFAIL_MSG( wxT("wxYield called recursively" ) );
 347         }
 348
 349         return FALSE;
 350     }
 351
 352     s_inYield = TRUE;
 353
 354     while (wxTheApp && wxTheApp->Pending())
 355         wxTheApp->Dispatch();
 356
 357     s_inYield = FALSE;
 358
 359     return TRUE;
 360 }
 361
 362 // ----------------------------------------------------------------------------
 363 // accessors for C modules
 364 // ----------------------------------------------------------------------------
 365
 366 extern "C" XtAppContext wxGetAppContext()
 367 {
 368     return (XtAppContext)wxTheApp->GetAppContext();
 369 }