From 7208b95d36b1db89829187225bd1ae832794af1f Mon Sep 17 00:00:00 2001
From: curt <curt>
Date: Wed, 23 May 2001 22:59:40 +0000
Subject: [PATCH] Initial revision.  (Contributed by David Megginson)

---
 src/Input/Makefile.am |   5 +
 src/Input/input.cxx   | 827 ++++++++++++++++++++++++++++++++++++++++++
 src/Input/input.hxx   | 184 ++++++++++
 3 files changed, 1016 insertions(+)
 create mode 100644 src/Input/Makefile.am
 create mode 100644 src/Input/input.cxx
 create mode 100644 src/Input/input.hxx

diff --git a/src/Input/Makefile.am b/src/Input/Makefile.am
new file mode 100644
index 000000000..7ee2ac39f
--- /dev/null
+++ b/src/Input/Makefile.am
@@ -0,0 +1,5 @@
+noinst_LIBRARIES = libInput.a
+
+libInput_a_SOURCES = input.cxx input.hxx
+
+INCLUDES += -I$(top_srcdir) -I$(top_srcdir)/src
diff --git a/src/Input/input.cxx b/src/Input/input.cxx
new file mode 100644
index 000000000..a309b14d9
--- /dev/null
+++ b/src/Input/input.cxx
@@ -0,0 +1,827 @@
+// input.cxx -- handle user input from various sources.
+//
+// Written by David Megginson, started May 2001.
+//
+// Copyright (C) 2001 David Megginson, david@megginson.com
+//
+// This program is free software; you can redistribute it and/or
+// modify it under the terms of the GNU General Public License as
+// published by the Free Software Foundation; either version 2 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful, but
+// WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+//
+// $Id$
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif
+
+#include <simgear/compiler.h>
+
+#include STL_FSTREAM
+#include STL_STRING
+
+#include <simgear/constants.h>
+#include <simgear/debug/logstream.hxx>
+#include <simgear/misc/props.hxx>
+
+#include <Aircraft/aircraft.hxx>
+#include <Autopilot/auto_gui.hxx>
+#include <Autopilot/newauto.hxx>
+#include <Cockpit/hud.hxx>
+#include <Cockpit/panel.hxx>
+#include <Cockpit/panel_io.hxx>
+#include <GUI/gui.h>
+#include <Scenery/tilemgr.hxx>
+#include <Objects/matlib.hxx>
+#include <Time/light.hxx>
+#include <Time/tmp.hxx>
+
+#ifndef FG_OLD_WEATHER
+#  include <WeatherCM/FGLocalWeatherDatabase.h>
+#else
+#  include <Weather/weather.hxx>
+#endif
+
+#include <Main/bfi.hxx>
+#include <Main/globals.hxx>
+#include <Main/keyboard.hxx>
+#include <Main/fg_props.hxx>
+#include <Main/options.hxx>
+
+#include "input.hxx"
+
+SG_USING_STD(ifstream);
+SG_USING_STD(string);
+
+
+
+////////////////////////////////////////////////////////////////////////
+// Implementation of FGBinding.
+////////////////////////////////////////////////////////////////////////
+
+FGBinding::FGBinding ()
+  : _action(ACTION_NONE), _node(0), _adjust_step(0), _assign_value(0)
+{
+}
+
+FGBinding::FGBinding (const SGPropertyNode * node)
+  : _action(ACTION_NONE), _node(0), _adjust_step(0), _assign_value(0)
+{
+  read(node);
+}
+
+FGBinding::~FGBinding ()
+{
+  // no op
+}
+
+void
+FGBinding::setAction (Action action)
+{
+  _action = action;
+}
+
+void
+FGBinding::setProperty (SGPropertyNode * node)
+{
+  _node = node;
+}
+
+void
+FGBinding::setAdjustStep (const SGValue * step)
+{
+  _adjust_step = step;
+}
+
+void
+FGBinding::setAssignValue (const SGValue * value)
+{
+  _assign_value = value;
+}
+
+void
+FGBinding::read (const SGPropertyNode * node)
+{
+  if (node->hasValue("action")) {
+    string action = node->getStringValue("action");
+    if (action == "none")
+      _action = ACTION_NONE;
+    else if (action == "switch")
+      _action = ACTION_SWITCH;
+    else if (action == "adjust")
+      _action = ACTION_ADJUST;
+    else if (action == "assign")
+      _action = ACTION_ASSIGN;
+    else
+      SG_LOG(SG_INPUT, SG_ALERT, "Ignoring unrecognized action type "
+	     << action);
+  }
+
+  if (node->hasValue("control"))
+    _node = fgGetNode(node->getStringValue("control"), true);
+
+  if (node->hasValue("step"))
+    _adjust_step = node->getChild("step")->getValue();
+
+  if (node->hasValue("value"))
+    _assign_value = node->getChild("value")->getValue();
+}
+
+void
+FGBinding::fire () const
+{
+  if (_node == 0) {
+    SG_LOG(SG_INPUT, SG_ALERT, "No control property attached to binding");
+    return;
+  }
+
+  switch (_action) {
+
+  case ACTION_NONE:
+    break;
+
+  case ACTION_SWITCH:
+    _node->setBoolValue(!_node->getBoolValue());
+    break;
+
+  case ACTION_ADJUST:
+    if  (_adjust_step == 0) {
+      SG_LOG(SG_INPUT, SG_ALERT, "No step provided for adjust binding");
+      break;
+    }
+    switch (_node->getType()) {
+    case SGValue::BOOL:
+      if (_adjust_step->getBoolValue())
+	_node->setBoolValue(!_node->getBoolValue());
+      break;
+    case SGValue::INT:
+      _node->setIntValue(_node->getIntValue() + _adjust_step->getIntValue());
+      break;
+    case SGValue::LONG:
+      _node->setLongValue(_node->getLongValue() + _adjust_step->getLongValue());
+      break;
+    case SGValue::FLOAT:
+      _node->setFloatValue(_node->getFloatValue()
+			   + _adjust_step->getFloatValue());
+      break;
+    case SGValue::DOUBLE:
+    case SGValue::UNKNOWN:	// force to double
+      _node->setDoubleValue(_node->getDoubleValue()
+			    + _adjust_step->getDoubleValue());
+      break;
+    case SGValue::STRING:
+      SG_LOG(SG_INPUT, SG_ALERT, "Cannot increment or decrement string value"
+	     << _node->getStringValue());
+      break;
+    }
+    break;
+
+  case ACTION_ASSIGN:
+    if  (_assign_value == 0) {
+      SG_LOG(SG_INPUT, SG_ALERT, "No value provided for assign binding");
+      break;
+    }
+    switch (_node->getType()) {
+    case SGValue::BOOL:
+      _node->setBoolValue(_assign_value->getBoolValue());
+      break;
+    case SGValue::INT:
+      _node->setIntValue(_assign_value->getIntValue());
+      break;
+    case SGValue::LONG:
+      _node->setLongValue(_assign_value->getLongValue());
+      break;
+    case SGValue::FLOAT:
+      _node->setFloatValue(_assign_value->getFloatValue());
+      break;
+    case SGValue::DOUBLE:
+      _node->setDoubleValue(_assign_value->getDoubleValue());
+      break;
+    case SGValue::STRING:
+      _node->setStringValue(_assign_value->getStringValue());
+      break;
+    case SGValue::UNKNOWN:
+      _node->setUnknownValue(_assign_value->getStringValue());
+      break;
+    }
+    break;
+  }
+}
+
+
+
+////////////////////////////////////////////////////////////////////////
+// Implementation of FGInput.
+////////////////////////////////////////////////////////////////////////
+
+				// From main.cxx
+extern void fgReshape( int width, int height );
+
+FGInput current_input;
+
+
+FGInput::FGInput ()
+{
+  // no op
+}
+
+FGInput::~FGInput ()
+{
+  // no op
+}
+
+void
+FGInput::init ()
+{
+				// Read the keyboard bindings.
+				// TODO: zero the old bindings first.
+  const SGPropertyNode * keyboard =
+    globals->get_props()->getNode("/input/keyboard", true);
+  vector<const SGPropertyNode *> keys = keyboard->getChildren("key");
+
+  for (int i = 0; i < keys.size(); i++) {
+    int index = keys[i]->getIndex();
+    int modifiers = MOD_NONE;
+    if (keys[i]->getBoolValue("mod-shift"))
+      modifiers |= MOD_SHIFT;
+    if (keys[i]->getBoolValue("mod-ctrl"))
+      modifiers |= MOD_CTRL;
+    if (keys[i]->getBoolValue("mod-alt"))
+      modifiers |= MOD_ALT;
+    SG_LOG(SG_INPUT, SG_INFO, "Binding key " << index
+	   << " with modifiers " << modifiers);
+
+    vector<const SGPropertyNode *> bindings = keys[i]->getChildren("binding");
+    for (int j = 0; j < bindings.size(); j++) {
+      SG_LOG(SG_INPUT, SG_INFO, "  Adding binding " << j);
+      _key_bindings[modifiers][index].push_back(FGBinding(bindings[j]));
+    }
+  }
+}
+
+void
+FGInput::bind ()
+{
+  // no op
+}
+
+void
+FGInput::unbind ()
+{
+  // no op
+}
+
+void 
+FGInput::update ()
+{
+  // we'll do something here with the joystick
+}
+
+void
+FGInput::doKey (int k, int modifiers, int x, int y)
+{
+  float fov, tmp;
+  static bool winding_ccw = true;
+  int speed;
+
+  SG_LOG(SG_INPUT, SG_INFO, "User pressed key " << k
+	 << " with modifiers " << modifiers);
+
+  if (_key_bindings[modifiers].find(k) != _key_bindings[modifiers].end()) {
+    const vector<FGBinding> &bindings = _key_bindings[modifiers][k];
+    for (int i = 0; i < bindings.size(); i++) {
+      bindings[i].fire();
+    }
+    return;
+  }
+
+  SG_LOG(SG_INPUT, SG_INFO, "(No user binding.)");
+
+				// Use the old, default actions.
+  FGInterface *f = current_aircraft.fdm_state;
+  FGViewer *v = globals->get_current_view();
+  
+  // everything after here will be removed sooner or later...
+
+  if (modifiers & MOD_SHIFT) {
+
+	switch (k) {
+	case 7: // Ctrl-G key
+	    current_autopilot->set_AltitudeMode( 
+                  FGAutopilot::FG_ALTITUDE_GS1 );
+	    current_autopilot->set_AltitudeEnabled(
+		  ! current_autopilot->get_AltitudeEnabled()
+	        );
+	    return;
+	case 18: // Ctrl-R key
+	    // temporary
+	    winding_ccw = !winding_ccw;
+	    if ( winding_ccw ) {
+		glFrontFace ( GL_CCW );
+	    } else {
+		glFrontFace ( GL_CW );
+	    }
+	    return;
+	case 19: // Ctrl-S key
+	    current_autopilot->set_AutoThrottleEnabled(
+		  ! current_autopilot->get_AutoThrottleEnabled()
+	        );
+	    return;
+	case 20: // Ctrl-T key
+	    current_autopilot->set_AltitudeMode( 
+                  FGAutopilot::FG_ALTITUDE_TERRAIN );
+	    current_autopilot->set_AltitudeEnabled(
+		  ! current_autopilot->get_AltitudeEnabled()
+	        );
+	    return;
+	case 49: // numeric keypad 1
+	    v->set_goal_view_offset( SGD_PI * 0.75 );
+	    return;
+	case 50: // numeric keypad 2
+	    v->set_goal_view_offset( SGD_PI );
+	    return;
+	case 51: // numeric keypad 3
+	    v->set_goal_view_offset( SGD_PI * 1.25 );
+	    return;
+	case 52: // numeric keypad 4
+	    v->set_goal_view_offset( SGD_PI * 0.50 );
+	    return;
+	case 54: // numeric keypad 6
+	    v->set_goal_view_offset( SGD_PI * 1.50 );
+	    return;
+	case 55: // numeric keypad 7
+	    v->set_goal_view_offset( SGD_PI * 0.25 );
+	    return;
+	case 56: // numeric keypad 8
+	    v->set_goal_view_offset( 0.00 );
+	    return;
+	case 57: // numeric keypad 9
+	    v->set_goal_view_offset( SGD_PI * 1.75 );
+	    return;
+	case 72: // H key
+	    HUD_brightkey( true );
+	    return;
+	case 73: // I key
+	    // Minimal Hud
+	    fgHUDInit2(&current_aircraft);
+	    return;
+	case 77: // M key
+	    globals->inc_warp( -60 );
+	    fgUpdateSkyAndLightingParams();
+	    return;
+	case 84: // T key
+	    globals->inc_warp_delta( -30 );
+	    fgUpdateSkyAndLightingParams();
+	    return;
+	case 87: // W key
+#if defined(FX) && !defined(WIN32)
+	    global_fullscreen = ( !global_fullscreen );
+#  if defined(XMESA_FX_FULLSCREEN) && defined(XMESA_FX_WINDOW)
+	    XMesaSetFXmode( global_fullscreen ? 
+			    XMESA_FX_FULLSCREEN : XMESA_FX_WINDOW );
+#  endif
+#endif
+	    return;
+	case 88: // X key
+	    fov = globals->get_current_view()->get_fov();
+	    fov *= 1.05;
+	    if ( fov > FG_FOV_MAX ) {
+		fov = FG_FOV_MAX;
+	    }
+	    globals->get_current_view()->set_fov(fov);
+	    // v->force_update_fov_math();
+	    return;
+	case 90: // Z key
+#ifndef FG_OLD_WEATHER
+	    tmp = WeatherDatabase->getWeatherVisibility();
+	    tmp /= 1.10;
+	    WeatherDatabase->setWeatherVisibility( tmp );
+#else
+	    tmp = current_weather.get_visibility();   // in meters
+	    tmp /= 1.10;
+	    current_weather.set_visibility( tmp );
+#endif
+	    return;
+
+// START SPECIALS
+
+ 	case 256+GLUT_KEY_F1: {
+ 	    ifstream input("fgfs.sav");
+ 	    if (input.good() && fgLoadFlight(input)) {
+   	        input.close();
+ 		SG_LOG(SG_INPUT, SG_INFO, "Restored flight from fgfs.sav");
+ 	    } else {
+ 	        SG_LOG(SG_INPUT, SG_ALERT, "Cannot load flight from fgfs.sav");
+ 	    }
+ 	    return;
+ 	}
+ 	case 256+GLUT_KEY_F2: {
+ 	    SG_LOG(SG_INPUT, SG_INFO, "Saving flight");
+ 	    ofstream output("fgfs.sav");
+ 	    if (output.good() && fgSaveFlight(output)) {
+ 		output.close();
+ 		SG_LOG(SG_INPUT, SG_INFO, "Saved flight to fgfs.sav");
+ 	    } else {
+ 	        SG_LOG(SG_INPUT, SG_ALERT, "Cannot save flight to fgfs.sav");
+ 	    }
+ 	    return;
+ 	}
+	case 256+GLUT_KEY_F3: {
+            string panel_path =
+                fgGetString("/sim/panel/path", "Panels/Default/default.xml");
+            FGPanel * new_panel = fgReadPanel(panel_path);
+            if (new_panel == 0) {
+                SG_LOG(SG_INPUT, SG_ALERT,
+                       "Error reading new panel from " << panel_path);
+                return;
+            }
+            SG_LOG(SG_INPUT, SG_INFO, "Loaded new panel from " << panel_path);
+            current_panel->unbind();
+            delete current_panel;
+            current_panel = new_panel;
+            return;
+	}
+	case 256+GLUT_KEY_F4: {
+            SGPath props_path(globals->get_fg_root());
+            props_path.append("preferences.xml");
+            SG_LOG(SG_INPUT, SG_INFO, "Rereading global preferences");
+            if (!readProperties(props_path.str(), globals->get_props())) {
+                SG_LOG(SG_INPUT, SG_ALERT,
+                       "Failed to reread global preferences from "
+                       << props_path.str());
+            } else {
+                SG_LOG(SG_INPUT, SG_INFO, "Finished Reading global preferences");
+            }
+            return;
+	}
+	case 256+GLUT_KEY_F5: {
+            current_panel->setYOffset(current_panel->getYOffset() - 5);
+            fgReshape(fgGetInt("/sim/startup/xsize"),
+                      fgGetInt("/sim/startup/ysize"));
+            return;
+	}
+	case 256+GLUT_KEY_F6: {
+            current_panel->setYOffset(current_panel->getYOffset() + 5);
+            fgReshape(fgGetInt("/sim/startup/xsize"),
+                      fgGetInt("/sim/startup/ysize"));
+            return;
+	}
+	case 256+GLUT_KEY_F7: {
+            current_panel->setXOffset(current_panel->getXOffset() - 5);
+            return;
+	}
+	case 256+GLUT_KEY_F8: {
+            current_panel->setXOffset(current_panel->getXOffset() + 5);
+            return;
+	}
+        // case 256+GLUT_KEY_F9: {
+        //     return;
+        // }
+        case 256+GLUT_KEY_F10: {
+            fgToggleFDMdataLogging();
+            return;
+        }
+        // case 256+GLUT_KEY_F11: {
+        //     return;
+        // }
+        // case 256+GLUT_KEY_F12: {
+        //     return;
+        // }
+	case 256+GLUT_KEY_END: // numeric keypad 1
+	    v->set_goal_view_offset( SGD_PI * 0.75 );
+	    return;
+	case 256+GLUT_KEY_DOWN: // numeric keypad 2
+	    v->set_goal_view_offset( SGD_PI );
+	    return;
+	case 256+GLUT_KEY_PAGE_DOWN: // numeric keypad 3
+	    v->set_goal_view_offset( SGD_PI * 1.25 );
+	    return;
+	case 256+GLUT_KEY_LEFT: // numeric keypad 4
+	    v->set_goal_view_offset( SGD_PI * 0.50 );
+	    return;
+	case 256+GLUT_KEY_RIGHT: // numeric keypad 6
+	    v->set_goal_view_offset( SGD_PI * 1.50 );
+	    return;
+	case 256+GLUT_KEY_HOME: // numeric keypad 7
+	    v->set_goal_view_offset( SGD_PI * 0.25 );
+	    return;
+	case 256+GLUT_KEY_UP: // numeric keypad 8
+	    v->set_goal_view_offset( 0.00 );
+	    return;
+	case 256+GLUT_KEY_PAGE_UP: // numeric keypad 9
+	    v->set_goal_view_offset( SGD_PI * 1.75 );
+	    return;
+
+// END SPECIALS
+
+	}
+
+
+    } else {
+	SG_LOG( SG_INPUT, SG_DEBUG, "" );
+	switch (k) {
+	case 98: // b key
+	    int b_ret;
+	    double b_set;
+	    b_ret = int( controls.get_brake( 0 ) );
+	    b_set = double(!b_ret);
+	    controls.set_brake( FGControls::ALL_WHEELS, b_set);
+	    return;
+	case 44: // , key
+	    if (controls.get_brake(0) > 0.0) {
+	        controls.set_brake(0, 0.0);
+	    } else {
+	        controls.set_brake(0, 1.0);
+	    }
+	    return;
+	case 46: // . key
+	    if (controls.get_brake(1) > 0.0) {
+	        controls.set_brake(1, 0.0);
+	    } else {
+	        controls.set_brake(1, 1.0);
+	    }
+	    return;
+	case 104: // h key
+	    HUD_masterswitch( true );
+	    return;
+	case 105: // i key
+	    fgHUDInit(&current_aircraft);  // normal HUD
+	    return;
+	case 109: // m key
+	    globals->inc_warp( 60 );
+	    fgUpdateSkyAndLightingParams();
+	    return;
+	case 112: // p key
+	    globals->set_freeze( ! globals->get_freeze() );
+
+	    {
+		SGBucket p( f->get_Longitude() * SGD_RADIANS_TO_DEGREES,
+			    f->get_Latitude() * SGD_RADIANS_TO_DEGREES );
+		SGPath tile_path( globals->get_fg_root() );
+		tile_path.append( "Scenery" );
+		tile_path.append( p.gen_base_path() );
+		tile_path.append( p.gen_index_str() );
+
+		// printf position and attitude information
+		SG_LOG( SG_INPUT, SG_INFO,
+			"Lon = " << f->get_Longitude() * SGD_RADIANS_TO_DEGREES
+			<< "  Lat = " << f->get_Latitude() * SGD_RADIANS_TO_DEGREES
+			<< "  Altitude = " << f->get_Altitude() * SG_FEET_TO_METER
+			);
+		SG_LOG( SG_INPUT, SG_INFO,
+			"Heading = " << f->get_Psi() * SGD_RADIANS_TO_DEGREES 
+			<< "  Roll = " << f->get_Phi() * SGD_RADIANS_TO_DEGREES
+			<< "  Pitch = " << f->get_Theta() * SGD_RADIANS_TO_DEGREES );
+		SG_LOG( SG_INPUT, SG_INFO, tile_path.c_str());
+	    }
+	    return;
+	case 116: // t key
+	    globals->inc_warp_delta( 30 );
+	    fgUpdateSkyAndLightingParams();
+	    return;
+	case 118: // v key
+	    // handles GUI state as well as Viewer LookAt Direction
+	    CenterView();
+	    globals->set_current_view( globals->get_viewmgr()->next_view() );
+	    fgReshape( fgGetInt("/sim/startup/xsize"),
+		       fgGetInt("/sim/startup/ysize") );
+	    return;
+	case 120: // x key
+	    fov = globals->get_current_view()->get_fov();
+	    fov /= 1.05;
+	    if ( fov < FG_FOV_MIN ) {
+		fov = FG_FOV_MIN;
+	    }
+	    globals->get_current_view()->set_fov(fov);
+	    // v->force_update_fov_math();
+	    return;
+	case 122: // z key
+#ifndef FG_OLD_WEATHER
+	    tmp = WeatherDatabase->getWeatherVisibility();
+	    tmp *= 1.10;
+	    WeatherDatabase->setWeatherVisibility( tmp );
+#else
+	    tmp = current_weather.get_visibility();   // in meters
+	    tmp *= 1.10;
+	    current_weather.set_visibility( tmp );
+#endif
+	    return;
+	case 27: // ESC
+	    // if( fg_DebugOutput ) {
+	    //   fclose( fg_DebugOutput );
+	    // }
+	    SG_LOG( SG_INPUT, SG_ALERT, 
+		    "Program exit requested." );
+	    ConfirmExitDialog();
+	    return;
+
+// START SPECIALS
+
+	case 256+GLUT_KEY_F2: // F2 Reload Tile Cache...
+	    {
+		bool freeze = globals->get_freeze();
+		SG_LOG(SG_INPUT, SG_INFO, "ReIniting TileCache");
+		if ( !freeze ) 
+		    globals->set_freeze( true );
+		BusyCursor(0);
+		if ( global_tile_mgr.init() ) {
+		    // Load the local scenery data
+		    global_tile_mgr.update( 
+		        cur_fdm_state->get_Longitude() * SGD_RADIANS_TO_DEGREES,
+			cur_fdm_state->get_Latitude() * SGD_RADIANS_TO_DEGREES );
+		} else {
+		    SG_LOG( SG_GENERAL, SG_ALERT, 
+			    "Error in Tile Manager initialization!" );
+		    exit(-1);
+		}
+		BusyCursor(1);
+		if ( !freeze )
+		   globals->set_freeze( false );
+		return;
+	    }
+	case 256+GLUT_KEY_F3: // F3 Take a screen shot
+	    fgDumpSnapShot();
+	    return;
+        case 256+GLUT_KEY_F4: // F4 Update lighting manually
+	    fgUpdateSkyAndLightingParams();
+            return;
+        case 256+GLUT_KEY_F6: // F6 toggles Autopilot target location
+	    if ( current_autopilot->get_HeadingMode() !=
+		 FGAutopilot::FG_HEADING_WAYPOINT ) {
+		current_autopilot->set_HeadingMode(
+		    FGAutopilot::FG_HEADING_WAYPOINT );
+		current_autopilot->set_HeadingEnabled( true );
+	    } else {
+		current_autopilot->set_HeadingMode(
+		    FGAutopilot::FG_TC_HEADING_LOCK );
+	    }
+	    return;
+	case 256+GLUT_KEY_F8: {// F8 toggles fog ... off fastest nicest...
+	    const string &fog = fgGetString("/sim/rendering/fog");
+	    if (fog == "disabled") {
+	      fgSetString("/sim/rendering/fog", "fastest");
+	      SG_LOG(SG_INPUT, SG_INFO, "Fog enabled, hint=fastest");
+	    } else if (fog == "fastest") {
+	      fgSetString("/sim/rendering/fog", "nicest");
+	      SG_LOG(SG_INPUT, SG_INFO, "Fog enabled, hint=nicest");
+	    } else if (fog == "nicest") {
+	      fgSetString("/sim/rendering/fog", "disabled");
+	      SG_LOG(SG_INPUT, SG_INFO, "Fog disabled");
+	    } else {
+	      fgSetString("/sim/rendering/fog", "disabled");
+	      SG_LOG(SG_INPUT, SG_ALERT, "Unrecognized fog type "
+		     << fog << ", changed to 'disabled'");
+	    }
+ 	    return;
+	}
+ 	case 256+GLUT_KEY_F9: // F9 toggles textures on and off...
+	    SG_LOG( SG_INPUT, SG_INFO, "Toggling texture" );
+	    if ( fgGetBool("/sim/rendering/textures")) {
+		fgSetBool("/sim/rendering/textures", false);
+		material_lib.set_step( 1 );
+	    } else {
+		fgSetBool("/sim/rendering/textures", true);
+		material_lib.set_step( 0 );
+	    }
+ 	    return;
+	case 256+GLUT_KEY_F10: // F10 toggles menu on and off...
+	    SG_LOG(SG_INPUT, SG_INFO, "Invoking call back function");
+	    guiToggleMenu();
+	    return;
+	case 256+GLUT_KEY_F11: // F11 Altitude Dialog.
+	    SG_LOG(SG_INPUT, SG_INFO, "Invoking Altitude call back function");
+	    NewAltitude( NULL );
+	    return;
+	case 256+GLUT_KEY_F12: // F12 Heading Dialog...
+	    SG_LOG(SG_INPUT, SG_INFO, "Invoking Heading call back function");
+	    NewHeading( NULL );
+	    return;
+	}
+
+// END SPECIALS
+
+    }
+}
+
+
+void
+FGInput::action (const SGPropertyNode * binding)
+{
+  const string &action = binding->getStringValue("action", "");
+  const string &control = binding->getStringValue("control", "");
+  bool repeatable = binding->getBoolValue("repeatable", false);
+  int step = binding->getIntValue("step", 0.0);
+
+  if (control == "") {
+    SG_LOG(SG_INPUT, SG_ALERT, "No control specified for key "
+	   << binding->getIndex());
+    return;
+  }
+
+  else if (action == "") {
+    SG_LOG(SG_INPUT, SG_ALERT, "No action specified for key "
+	   << binding->getIndex());
+    return;
+  }
+
+  else if (action == "switch") {
+    fgSetBool(control, !fgGetBool(control));
+  }
+
+  else if (action == "adjust") {
+    const SGValue * step = binding->getValue("step");
+    if (step == 0) {
+      SG_LOG(SG_INPUT, SG_ALERT, "No step supplied for adjust action for key "
+	     << binding->getIndex());
+      return;
+    }
+    SGValue * target = fgGetValue(control, true);
+				// Use the target's type...
+    switch (target->getType()) {
+    case SGValue::BOOL:
+    case SGValue::INT:
+      target->setIntValue(target->getIntValue() + step->getIntValue());
+      break;
+    case SGValue::LONG:
+      target->setLongValue(target->getLongValue() + step->getLongValue());
+      break;
+    case SGValue::FLOAT:
+      target->setFloatValue(target->getFloatValue() + step->getFloatValue());
+      break;
+    case SGValue::DOUBLE:
+    case SGValue::UNKNOWN:	// treat unknown as a double
+      target->setDoubleValue(target->getDoubleValue()
+			     + step->getDoubleValue());
+      break;
+    case SGValue::STRING:
+      SG_LOG(SG_INPUT, SG_ALERT, "Failed attempt to adjust string property "
+	     << control);
+      break;
+    }
+  }
+
+  else if (action == "assign") {
+    const SGValue * value = binding->getValue("value");
+    if (value == 0) {
+      SG_LOG(SG_INPUT, SG_ALERT, "No value supplied for assign action for key "
+	     << binding->getIndex());
+      return;
+    }
+    SGValue * target = fgGetValue(control, true);
+				// Use the target's type...
+    switch (target->getType()) {
+    case SGValue::BOOL:
+      target->setBoolValue(value->getBoolValue());
+      break;
+    case SGValue::INT:
+      target->setIntValue(value->getIntValue());
+      break;
+    case SGValue::LONG:
+      target->setLongValue(value->getLongValue());
+      break;
+    case SGValue::FLOAT:
+      target->setFloatValue(value->getFloatValue());
+      break;
+    case SGValue::DOUBLE:
+      target->setDoubleValue(value->getDoubleValue());
+      break;
+    case SGValue::STRING:
+      target->setStringValue(value->getStringValue());
+      break;
+    case SGValue::UNKNOWN:
+      target->setUnknownValue(value->getStringValue());
+      break;
+    }
+  }
+
+  else {
+    SG_LOG(SG_INPUT, SG_ALERT, "Unknown action " << action
+	   << " for key " << binding->getIndex());
+  }
+}
+
+
+#if 0
+    FGViewer *v = globals->get_current_view();
+
+    SG_LOG( SG_INPUT, SG_DEBUG, "Special key hit = " << k );
+
+    if ( GLUT_ACTIVE_SHIFT && glutGetModifiers() ) {
+	SG_LOG( SG_INPUT, SG_DEBUG, " SHIFTED" );
+	switch (k)
+    } else
+}
+
+#endif
+
+
+// end of input.cxx
diff --git a/src/Input/input.hxx b/src/Input/input.hxx
new file mode 100644
index 000000000..d3bae03b4
--- /dev/null
+++ b/src/Input/input.hxx
@@ -0,0 +1,184 @@
+// input.hxx -- handle user input from various sources.
+//
+// Written by David Megginson, started May 2001.
+//
+// Copyright (C) 2001 David Megginson, david@megginson.com
+//
+// This program is free software; you can redistribute it and/or
+// modify it under the terms of the GNU General Public License as
+// published by the Free Software Foundation; either version 2 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful, but
+// WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+//
+// $Id$
+
+
+#ifndef _INPUT_HXX
+#define _INPUT_HXX
+
+#ifndef __cplusplus                                                          
+# error This library requires C++
+#endif
+
+#include <simgear/compiler.h>
+
+#include <simgear/misc/props.hxx>
+
+#include <Main/fgfs.hxx>
+#include <Main/globals.hxx>
+
+#include <map>
+#include <vector>
+
+SG_USING_STD(map);
+SG_USING_STD(vector);
+
+/**
+ * An input binding of some sort.
+ *
+ * <p>This class represents a binding that can be assigned to a
+ * keyboard key, a joystick button or axis, or even a panel
+ * instrument.</p>
+ */
+class FGBinding
+{
+public:
+
+  enum Action {
+    ACTION_NONE,
+    ACTION_SWITCH,
+    ACTION_ADJUST,
+    ACTION_ASSIGN
+  };
+
+  FGBinding ();
+  FGBinding (const SGPropertyNode * node);
+  virtual ~FGBinding ();
+
+  virtual Action getAction () const { return _action; }
+  virtual SGPropertyNode * getProperty () { return _node; }
+  virtual const SGPropertyNode * getProperty () const { return _node; }
+  virtual const SGValue * getAdjustStep () const { return _adjust_step; }
+  virtual const SGValue * getAssignValue () const { return _assign_value; }
+  
+  virtual void setAction (Action action);
+  virtual void setProperty (SGPropertyNode * node);
+  virtual void setAdjustStep (const SGValue * step);
+  virtual void setAssignValue (const SGValue * value);
+
+  virtual void read (const SGPropertyNode * node);
+
+  virtual void fire () const;
+//   virtual void fire (double value);
+//   virtual void fire (int xdelta, int ydelta);
+
+private:
+  Action _action;
+  SGPropertyNode * _node;
+  const SGValue * _adjust_step;
+  const SGValue * _assign_value;
+};
+
+
+/**
+ * Generic input module.
+ *
+ * <p>This module is designed to handle input from multiple sources --
+ * keyboard, joystick, mouse, or even panel switches -- in a consistent
+ * way, and to allow users to rebind any of the actions at runtime.</p>
+ */
+class FGInput : public FGSubsystem
+{
+public:
+
+  enum {
+    MOD_NONE = 0,
+    MOD_SHIFT = 1,
+    MOD_CTRL = 2,
+    MOD_ALT = 4,
+    MOD_MAX = 8			// one past all modifiers
+  };
+
+  FGInput();
+  virtual ~FGInput();
+
+  //
+  // Implementation of FGSubsystem.
+  //
+  virtual void init ();
+  virtual void bind ();
+  virtual void unbind ();
+  virtual void update ();
+
+
+  /**
+   * Handle a single keystroke.
+   *
+   * <p>Note: for special keys, the integer key code will be the Glut
+   * code + 256.</p>
+   *
+   * @param k The integer key code, as returned by glut.
+   * @param modifiers Modifier keys pressed (bitfield).
+   * @param x The mouse x position at the time of keypress.
+   * @param y The mouse y position at the time of keypress.
+   * @see #MOD_SHIFT
+   * @see #MOD_CTRL
+   * @see #MOD_ALT
+   */
+  virtual void doKey (int k, int modifiers, int x, int y);
+
+
+  /**
+   * Fire off a single-trigger action.
+   *
+   * <p>This method fires an action triggered by a key or button
+   * press, with no additional quantity information.</p> 
+   *
+   * @param binding The property node with the binding.
+   */
+  virtual void action (const SGPropertyNode * binding);
+
+
+  /**
+   * Fire off a quantity action.
+   *
+   * <p>This method fires an action triggered by a change in value,
+   * such as a slider or axis.</p>
+   *
+   * @param action The property node with the binding.
+   * @param value The new value.
+   */
+//   virtual void action (const SGPropertyNode * binding, double value);
+
+
+  /**
+   * Fire off a movement action.
+   *
+   * <p>This method fires an action triggered by relative movement
+   * rather than an absolute value; it is especially applicable to
+   * mouse-movement bindings.</p>
+   *
+   * @param binding The property node containing the binding.
+   * @param xdelta The amount of X movement.
+   * @param ydelta The amount of Y movement.
+   */
+//   virtual void action (const SGPropertyNode * binding, int xdelta, int ydelta);
+
+private:
+
+  typedef map<int,vector<FGBinding> > keyboard_map;
+  keyboard_map _key_bindings[MOD_MAX];
+
+};
+
+extern FGInput current_input;
+
+#endif // _CONTROLS_HXX
-- 
2.39.5