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 int wxApp::MainLoop()
 148 {
 149     /*
 150     * Sit around forever waiting to process X-events. Property Change
 151     * event are handled special, because they have to refer to
 152     * the root window rather than to a widget. therefore we can't
 153     * use an Xt-eventhandler.
 154     */
 155
 156     XSelectInput(XtDisplay((Widget) wxTheApp->GetTopLevelWidget()),
 157         XDefaultRootWindow(XtDisplay((Widget) wxTheApp->GetTopLevelWidget())),
 158         PropertyChangeMask);
 159
 160     m_eventLoop->Run();
 161
 162     return 0;
 163 }
 164
 165 // This should be redefined in a derived class for
 166 // handling property change events for XAtom IPC.
 167 void wxApp::HandlePropertyChange(WXEvent *event)
 168 {
 169     // by default do nothing special
 170     XtDispatchEvent((XEvent*) event); /* let Motif do the work */
 171 }
 172
 173 static char *fallbackResources[] = {
 174     "*menuBar.marginHeight: 0",
 175     "*menuBar.shadowThickness: 1",
 176     "*background: #c0c0c0",
 177     "*foreground: black",
 178     NULL
 179 };
 180
 181 // Create an application context
 182 bool wxApp::OnInitGui()
 183 {
 184     if( !wxAppBase::OnInitGui() )
 185         return FALSE;
 186
 187     XtToolkitInitialize() ;
 188     wxTheApp->m_appContext = (WXAppContext) XtCreateApplicationContext();
 189     XtAppSetFallbackResources((XtAppContext) wxTheApp->m_appContext, fallbackResources);
 190
 191     Display *dpy = XtOpenDisplay((XtAppContext) wxTheApp->m_appContext,(String)NULL,NULL,
 192         wxTheApp->GetClassName().c_str(), NULL, 0,
 193 # if XtSpecificationRelease < 5
 194         (Cardinal*) &argc,
 195 # else
 196         &argc,
 197 # endif
 198         argv);
 199
 200     if (!dpy) {
 201          // if you don't log to stderr, nothing will be shown...
 202         delete wxLog::SetActiveTarget(new wxLogStderr);
 203         wxString className(wxTheApp->GetClassName());
 204         wxLogError(_("wxWindows could not open display for '%s': exiting."),
 205                    className.c_str());
 206         exit(-1);
 207     }
 208     m_initialDisplay = (WXDisplay*) dpy;
 209
 210 #ifdef __WXDEBUG__
 211     // install the X error handler
 212     gs_pfnXErrorHandler = XSetErrorHandler(wxXErrorHandler);
 213 #endif // __WXDEBUG__
 214
 215     // Add general resize proc
 216     XtActionsRec rec;
 217     rec.string = "resize";
 218     rec.proc = (XtActionProc)wxWidgetResizeProc;
 219     XtAppAddActions((XtAppContext) wxTheApp->m_appContext, &rec, 1);
 220
 221     GetMainColormap(dpy);
 222
 223     wxAddIdleCallback();
 224
 225     return TRUE;
 226 }
 227
 228 WXColormap wxApp::GetMainColormap(WXDisplay* display)
 229 {
 230     if (!display) /* Must be called first with non-NULL display */
 231         return m_mainColormap;
 232
 233     int defaultScreen = DefaultScreen((Display*) display);
 234     Screen* screen = XScreenOfDisplay((Display*) display, defaultScreen);
 235
 236     Colormap c = DefaultColormapOfScreen(screen);
 237
 238     if (!m_mainColormap)
 239         m_mainColormap = (WXColormap) c;
 240
 241     return (WXColormap) c;
 242 }
 243
 244 wxXVisualInfo* wxApp::GetVisualInfo( WXDisplay* display )
 245 {
 246     wxPerDisplayDataMap::iterator it = m_perDisplayData->find( display );
 247
 248     if( it != m_perDisplayData->end() && it->second.m_visualInfo )
 249         return it->second.m_visualInfo;
 250
 251     wxXVisualInfo* vi = new wxXVisualInfo;
 252     wxFillXVisualInfo( vi, (Display*)display );
 253
 254     (*m_perDisplayData)[display].m_visualInfo = vi;
 255
 256     return vi;
 257 }
 258
 259 static void wxTLWidgetDestroyCallback(Widget w, XtPointer clientData,
 260                                       XtPointer ptr)
 261 {
 262     if( wxTheApp )
 263         wxTheApp->SetTopLevelWidget( (WXDisplay*)XtDisplay(w),
 264                                      (WXWidget)NULL );
 265 }
 266
 267 WXWidget wxCreateTopLevelWidget( WXDisplay* display )
 268 {
 269     Widget tlw = XtAppCreateShell( (String)NULL,
 270                                    wxTheApp->GetClassName().c_str(),
 271                                    applicationShellWidgetClass,
 272                                    (Display*)display,
 273                                    NULL, 0 );
 274     XtSetMappedWhenManaged( tlw, False );
 275     XtRealizeWidget( tlw );
 276
 277     XtAddCallback( tlw, XmNdestroyCallback,
 278                    (XtCallbackProc)wxTLWidgetDestroyCallback,
 279                    (XtPointer)NULL );
 280
 281     return (WXWidget)tlw;
 282 }
 283
 284 WXWidget wxApp::GetTopLevelWidget()
 285 {
 286     WXDisplay* display = wxGetDisplay();
 287     wxPerDisplayDataMap::iterator it = m_perDisplayData->find( display );
 288
 289     if( it != m_perDisplayData->end() && it->second.m_topLevelWidget )
 290         return (WXWidget)it->second.m_topLevelWidget;
 291
 292     WXWidget tlw = wxCreateTopLevelWidget( display );
 293     SetTopLevelWidget( display, tlw );
 294
 295     return tlw;
 296 }
 297
 298 void wxApp::SetTopLevelWidget(WXDisplay* display, WXWidget widget)
 299 {
 300     (*m_perDisplayData)[display].m_topLevelWidget = (Widget)widget;
 301 }
 302
 303 // Yield to other processes
 304
 305 bool wxApp::Yield(bool onlyIfNeeded)
 306 {
 307     bool s_inYield = FALSE;
 308
 309     if ( s_inYield )
 310     {
 311         if ( !onlyIfNeeded )
 312         {
 313             wxFAIL_MSG( wxT("wxYield called recursively" ) );
 314         }
 315
 316         return FALSE;
 317     }
 318
 319     s_inYield = TRUE;
 320
 321     while (wxTheApp && wxTheApp->Pending())
 322         wxTheApp->Dispatch();
 323
 324     s_inYield = FALSE;
 325
 326     return TRUE;
 327 }
 328
 329 // ----------------------------------------------------------------------------
 330 // accessors for C modules
 331 // ----------------------------------------------------------------------------
 332
 333 extern "C" XtAppContext wxGetAppContext()
 334 {
 335     return (XtAppContext)wxTheApp->GetAppContext();
 336 }