e1dd52d38a
restoreInitialState methods to FGGlobals, as well as the two-stage commit described above for loading saved files. fgInit now takes a snapshot of the initial state before handing off to the main loop, and the GUI reInit function restores that state explicitly before calling fgReInit. The FlightGear patches also modify fg_props.hxx to add optional useDefault arguments to all of the fgTie functions -- that lets you choose whether you want to pick up any default value in the property tree when you tie the property (the default is true).
61 lines
1.6 KiB
C++
61 lines
1.6 KiB
C++
// fg_props.cxx -- support for
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//
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// Written by David Megginson, started November 1999.
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//
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// Copyright (C) 1999, 2000 David Megginson - david@megginson.com
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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//
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// $Id$
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#include <iostream>
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#include <Main/fgfs.hxx>
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#include "fg_props.hxx"
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using std::istream;
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using std::ostream;
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/**
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* Save the current state of the simulator to a stream.
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*/
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bool
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fgSaveFlight (ostream &output)
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{
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return writeProperties(output, globals->get_props());
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}
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/**
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* Restore the current state of the simulator from a stream.
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*/
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bool
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fgLoadFlight (istream &input)
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{
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SGPropertyNode props;
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if (readProperties(input, &props)) {
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copyProperties(&props, globals->get_props());
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// When loading a flight, make it the
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// new initial state.
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globals->saveInitialState();
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} else {
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FG_LOG(FG_INPUT, FG_ALERT, "Error restoring flight; aborted");
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return false;
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}
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}
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// end of fg_props.cxx
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