1 // globals.cxx -- Global state that needs to be shared among the sim modules
3 // Written by Curtis Olson, started July 2000.
5 // Copyright (C) 2000 Curtis L. Olson - curt@flightgear.org
7 // This program is free software; you can redistribute it and/or
8 // modify it under the terms of the GNU General Public License as
9 // published by the Free Software Foundation; either version 2 of the
10 // License, or (at your option) any later version.
12 // This program is distributed in the hope that it will be useful, but
13 // WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 // General Public License for more details.
17 // You should have received a copy of the GNU General Public License
18 // along with this program; if not, write to the Free Software
19 // Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 #include <simgear/misc/commands.hxx>
25 #include <simgear/misc/sg_path.hxx>
27 #include <Environment/environment_mgr.hxx>
29 #include "globals.hxx"
30 #include "viewmgr.hxx"
32 #include "fg_props.hxx"
36 ////////////////////////////////////////////////////////////////////////
37 // Implementation of FGGlobals.
38 ////////////////////////////////////////////////////////////////////////
45 FGGlobals::FGGlobals() :
46 subsystem_mgr( new FGSubsystemMgr ),
50 #if defined(FX) && defined(XMESA)
60 current_panel( NULL ),
62 environment_mgr( NULL ),
68 props( new SGPropertyNode ),
69 initial_state( NULL ),
71 commands( new SGCommandMgr ),
75 channel_options_list( NULL ),
84 FGGlobals::~FGGlobals()
94 // set the fg_root path
95 void FGGlobals::set_fg_root (const string &root) {
98 // append /data to root if it exists
99 SGPath tmp( fg_root );
100 tmp.append( "data" );
101 tmp.append( "version" );
102 if ( ulFileExists( tmp.c_str() ) ) {
109 FGGlobals::get_subsystem_mgr () const
111 return subsystem_mgr;
115 FGGlobals::get_subsystem (const char * name)
117 return subsystem_mgr->get_subsystem(name);
121 FGGlobals::add_subsystem (const char * name,
122 FGSubsystem * subsystem,
123 FGSubsystemMgr::GroupType type,
126 subsystem_mgr->add(name, subsystem, type, min_time_sec);
130 // Save the current state as the initial state.
132 FGGlobals::saveInitialState ()
134 delete initial_state;
135 initial_state = new SGPropertyNode();
136 if (!copyProperties(props, initial_state))
137 SG_LOG(SG_GENERAL, SG_ALERT, "Error saving initial state");
141 // Restore the saved initial state, if any
143 FGGlobals::restoreInitialState ()
145 if ( initial_state == 0 ) {
146 SG_LOG(SG_GENERAL, SG_ALERT,
147 "No initial state available to restore!!!");
151 SGPropertyNode *currentPresets = new SGPropertyNode;
152 SGPropertyNode *targetNode = fgGetNode( "/sim/presets" );
154 // stash the /sim/presets tree
155 if ( !copyProperties(targetNode, currentPresets) ) {
156 SG_LOG( SG_GENERAL, SG_ALERT, "Failed to save /sim/presets subtree" );
159 if ( copyProperties(initial_state, props) ) {
160 SG_LOG( SG_GENERAL, SG_INFO, "Initial state restored successfully" );
162 SG_LOG( SG_GENERAL, SG_INFO,
163 "Some errors restoring initial state (read-only props?)" );
166 // recover the /sim/presets tree
167 if ( !copyProperties(currentPresets, targetNode) ) {
168 SG_LOG( SG_GENERAL, SG_ALERT,
169 "Failed to restore /sim/presets subtree" );
172 delete currentPresets;
176 FGGlobals::get_current_view () const
178 return viewmgr->get_current_view();
181 // end of globals.cxx