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 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #ifdef __VMS
  20 #define XtParent XTPARENT
  21 #define XtDisplay XTDISPLAY
  22 #endif
  23
  24 #include "wx/app.h"
  25 #include "wx/utils.h"
  26 #include "wx/module.h"
  27 #include "wx/memory.h"
  28 #include "wx/log.h"
  29 #include "wx/intl.h"
  30 #include "wx/evtloop.h"
  31 #include "wx/hash.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 <Xm/Label.h>
  42 #include <X11/Xlib.h>
  43 #include <X11/Xutil.h>
  44 #include <X11/Xresource.h>
  45 #include <X11/Xatom.h>
  46 #ifdef __VMS__
  47 #pragma message enable nosimpint
  48 #endif
  49
  50 #include "wx/motif/private.h"
  51
  52 #include <string.h>
  53
  54 struct wxPerDisplayData
  55 {
  56     wxPerDisplayData()
  57     {
  58         m_visualInfo = NULL;
  59         m_topLevelWidget = NULL;
  60         m_topLevelRealizedWidget = NULL;
  61     }
  62
  63     wxXVisualInfo* m_visualInfo;
  64     Widget         m_topLevelWidget, m_topLevelRealizedWidget;
  65 };
  66
  67 static void wxTLWidgetDestroyCallback(Widget w, XtPointer clientData,
  68                                       XtPointer ptr);
  69 static WXWidget wxCreateTopLevelWidget( WXDisplay* display );
  70
  71 extern wxList wxPendingDelete;
  72 extern bool wxAddIdleCallback();
  73
  74 wxHashTable *wxWidgetHashTable = NULL;
  75
  76 IMPLEMENT_DYNAMIC_CLASS(wxApp, wxEvtHandler)
  77
  78 BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
  79     EVT_IDLE(wxAppBase::OnIdle)
  80 END_EVENT_TABLE()
  81
  82 #ifdef __WXDEBUG__
  83     typedef int (*XErrorHandlerFunc)(Display *, XErrorEvent *);
  84
  85     XErrorHandlerFunc gs_pfnXErrorHandler = 0;
  86
  87     static int wxXErrorHandler(Display *dpy, XErrorEvent *xevent)
  88     {
  89         // just forward to the default handler for now
  90         return gs_pfnXErrorHandler(dpy, xevent);
  91     }
  92 #endif // __WXDEBUG__
  93
  94 bool wxApp::Initialize(int& argc, wxChar **argv)
  95 {
  96     if ( !wxAppBase::Initialize(argc, argv) )
  97         return false;
  98
  99     wxWidgetHashTable = new wxHashTable(wxKEY_INTEGER);
 100
 101     return true;
 102 }
 103
 104 void wxApp::CleanUp()
 105 {
 106     delete wxWidgetHashTable;
 107     wxWidgetHashTable = NULL;
 108
 109     wxAppBase::CleanUp();
 110 }
 111
 112 void wxApp::Exit()
 113 {
 114     wxApp::CleanUp();
 115
 116     wxAppConsole::Exit();
 117 }
 118
 119 // ============================================================================
 120 // wxApp
 121 // ============================================================================
 122
 123 wxApp::wxApp()
 124 {
 125     argc = 0;
 126     argv = NULL;
 127
 128     m_mainLoop = new wxEventLoop;
 129     m_mainColormap = (WXColormap) NULL;
 130     m_appContext = (WXAppContext) NULL;
 131     m_initialDisplay = (WXDisplay*) 0;
 132     m_perDisplayData = new wxPerDisplayDataMap;
 133 }
 134
 135 wxApp::~wxApp()
 136 {
 137     delete m_mainLoop;
 138
 139     for( wxPerDisplayDataMap::iterator it  = m_perDisplayData->begin(),
 140                                        end = m_perDisplayData->end();
 141          it != end; ++it )
 142     {
 143         delete it->second->m_visualInfo;
 144         XtDestroyWidget( it->second->m_topLevelWidget );
 145         delete it->second;
 146     }
 147
 148     delete m_perDisplayData;
 149
 150     wxApp::SetInstance(NULL);
 151 }
 152
 153 int wxApp::MainLoop()
 154 {
 155     /*
 156     * Sit around forever waiting to process X-events. Property Change
 157     * event are handled special, because they have to refer to
 158     * the root window rather than to a widget. therefore we can't
 159     * use an Xt-eventhandler.
 160     */
 161
 162     XSelectInput(XtDisplay((Widget) wxTheApp->GetTopLevelWidget()),
 163         XDefaultRootWindow(XtDisplay((Widget) wxTheApp->GetTopLevelWidget())),
 164         PropertyChangeMask);
 165
 166     m_mainLoop->Run();
 167
 168     return 0;
 169 }
 170
 171 // This should be redefined in a derived class for
 172 // handling property change events for XAtom IPC.
 173 void wxApp::HandlePropertyChange(WXEvent *event)
 174 {
 175     // by default do nothing special
 176     XtDispatchEvent((XEvent*) event); /* let Motif do the work */
 177 }
 178
 179 static char *fallbackResources[] = {
 180     "*menuBar.marginHeight: 0",
 181     "*menuBar.shadowThickness: 1",
 182     "*background: #c0c0c0",
 183     "*foreground: black",
 184     NULL
 185 };
 186
 187 // Create an application context
 188 bool wxApp::OnInitGui()
 189 {
 190     if( !wxAppBase::OnInitGui() )
 191         return FALSE;
 192
 193     XtToolkitInitialize() ;
 194     wxTheApp->m_appContext = (WXAppContext) XtCreateApplicationContext();
 195     XtAppSetFallbackResources((XtAppContext) wxTheApp->m_appContext, fallbackResources);
 196
 197     Display *dpy = XtOpenDisplay((XtAppContext) wxTheApp->m_appContext,(String)NULL,NULL,
 198         wxTheApp->GetClassName().c_str(), NULL, 0,
 199 # if XtSpecificationRelease < 5
 200         (Cardinal*) &argc,
 201 # else
 202         &argc,
 203 # endif
 204         argv);
 205
 206     if (!dpy) {
 207          // if you don't log to stderr, nothing will be shown...
 208         delete wxLog::SetActiveTarget(new wxLogStderr);
 209         wxString className(wxTheApp->GetClassName());
 210         wxLogError(_("wxWidgets could not open display for '%s': exiting."),
 211                    className.c_str());
 212         exit(-1);
 213     }
 214     m_initialDisplay = (WXDisplay*) dpy;
 215
 216 #ifdef __WXDEBUG__
 217     // install the X error handler
 218     gs_pfnXErrorHandler = XSetErrorHandler(wxXErrorHandler);
 219 #endif // __WXDEBUG__
 220
 221     // Add general resize proc
 222     XtActionsRec rec;
 223     rec.string = "resize";
 224     rec.proc = (XtActionProc)wxWidgetResizeProc;
 225     XtAppAddActions((XtAppContext) wxTheApp->m_appContext, &rec, 1);
 226
 227     GetMainColormap(dpy);
 228
 229     wxAddIdleCallback();
 230
 231     return TRUE;
 232 }
 233
 234 WXColormap wxApp::GetMainColormap(WXDisplay* display)
 235 {
 236     if (!display) /* Must be called first with non-NULL display */
 237         return m_mainColormap;
 238
 239     int defaultScreen = DefaultScreen((Display*) display);
 240     Screen* screen = XScreenOfDisplay((Display*) display, defaultScreen);
 241
 242     Colormap c = DefaultColormapOfScreen(screen);
 243
 244     if (!m_mainColormap)
 245         m_mainColormap = (WXColormap) c;
 246
 247     return (WXColormap) c;
 248 }
 249
 250 static inline wxPerDisplayData& GetOrCreatePerDisplayData
 251     ( wxPerDisplayDataMap& m, WXDisplay* display )
 252 {
 253     wxPerDisplayDataMap::iterator it = m.find( display );
 254     if( it != m.end() && it->second != NULL )
 255         return *(it->second);
 256
 257     wxPerDisplayData* nData = new wxPerDisplayData();
 258     m[display] = nData;
 259
 260     return *nData;
 261 }
 262
 263 wxXVisualInfo* wxApp::GetVisualInfo( WXDisplay* display )
 264 {
 265     wxPerDisplayData& data = GetOrCreatePerDisplayData( *m_perDisplayData,
 266                                                         display );
 267     if( data.m_visualInfo )
 268         return data.m_visualInfo;
 269
 270     wxXVisualInfo* vi = new wxXVisualInfo;
 271     wxFillXVisualInfo( vi, (Display*)display );
 272
 273     data.m_visualInfo = vi;
 274
 275     return vi;
 276 }
 277
 278 static void wxTLWidgetDestroyCallback(Widget w, XtPointer clientData,
 279                                       XtPointer ptr)
 280 {
 281     if( wxTheApp )
 282     {
 283         wxTheApp->SetTopLevelWidget( (WXDisplay*)XtDisplay(w),
 284                                      (WXWidget)NULL );
 285         wxTheApp->SetTopLevelRealizedWidget( (WXDisplay*)XtDisplay(w),
 286                                              (WXWidget)NULL );
 287     }
 288 }
 289
 290 WXWidget wxCreateTopLevelWidget( WXDisplay* display )
 291 {
 292     Widget tlw = XtAppCreateShell( (String)NULL,
 293                                    wxTheApp->GetClassName().c_str(),
 294                                    applicationShellWidgetClass,
 295                                    (Display*)display,
 296                                    NULL, 0 );
 297     XtVaSetValues( tlw,
 298                    XmNoverrideRedirect, True,
 299                    NULL );
 300
 301     XtAddCallback( tlw, XmNdestroyCallback,
 302                    (XtCallbackProc)wxTLWidgetDestroyCallback,
 303                    (XtPointer)NULL );
 304
 305     return (WXWidget)tlw;
 306 }
 307
 308 WXWidget wxCreateTopLevelRealizedWidget( WXDisplay* display )
 309 {
 310     Widget rTlw = XtVaCreateWidget( "dummy_widget", xmLabelWidgetClass,
 311                                     (Widget)wxTheApp->GetTopLevelWidget(),
 312                                     NULL);
 313     XtSetMappedWhenManaged( rTlw, False );
 314     XtRealizeWidget( rTlw );
 315
 316     return (WXWidget)rTlw;
 317 }
 318
 319 WXWidget wxApp::GetTopLevelWidget()
 320 {
 321     WXDisplay* display = wxGetDisplay();
 322     wxPerDisplayData& data = GetOrCreatePerDisplayData( *m_perDisplayData,
 323                                                         display );
 324     if( data.m_topLevelWidget )
 325         return (WXWidget)data.m_topLevelWidget;
 326
 327     WXWidget tlw = wxCreateTopLevelWidget( display );
 328     SetTopLevelWidget( display, tlw );
 329
 330     return tlw;
 331 }
 332
 333 WXWidget wxApp::GetTopLevelRealizedWidget()
 334 {
 335     WXDisplay* display = wxGetDisplay();
 336     wxPerDisplayDataMap::iterator it = m_perDisplayData->find( display );
 337
 338     if( it != m_perDisplayData->end() && it->second->m_topLevelRealizedWidget )
 339         return (WXWidget)it->second->m_topLevelRealizedWidget;
 340
 341     WXWidget rTlw = wxCreateTopLevelRealizedWidget( display );
 342     SetTopLevelRealizedWidget( display, rTlw );
 343
 344     return rTlw;
 345 }
 346
 347 void wxApp::SetTopLevelWidget(WXDisplay* display, WXWidget widget)
 348 {
 349     GetOrCreatePerDisplayData( *m_perDisplayData, display )
 350         .m_topLevelWidget = (Widget)widget;
 351 }
 352
 353 void wxApp::SetTopLevelRealizedWidget(WXDisplay* display, WXWidget widget)
 354 {
 355     GetOrCreatePerDisplayData( *m_perDisplayData, display )
 356         .m_topLevelRealizedWidget = (Widget)widget;
 357 }
 358
 359 // Yield to other processes
 360
 361 bool wxApp::Yield(bool onlyIfNeeded)
 362 {
 363     static bool s_inYield = FALSE;
 364
 365     if ( s_inYield )
 366     {
 367         if ( !onlyIfNeeded )
 368         {
 369             wxFAIL_MSG( wxT("wxYield called recursively" ) );
 370         }
 371
 372         return FALSE;
 373     }
 374
 375     s_inYield = TRUE;
 376
 377     while (wxTheApp && wxTheApp->Pending())
 378         wxTheApp->Dispatch();
 379
 380     s_inYield = FALSE;
 381
 382     return TRUE;
 383 }
 384
 385 // ----------------------------------------------------------------------------
 386 // accessors for C modules
 387 // ----------------------------------------------------------------------------
 388
 389 extern "C" XtAppContext wxGetAppContext()
 390 {
 391     return (XtAppContext)wxTheApp->GetAppContext();
 392 }