Make hardcoded error values configurable.

[flightgear.git] / src / Instrumentation / KLN89 / kln89.hxx

// kln89_page.hxx - a class to manage the simulation of a KLN89
//                  GPS unit.  Note that this is primarily the 
//                  simulation of the user interface and display
//                  - the core GPS calculations such as position
//                  and waypoint sequencing are done (or should 
//                  be done) by FG code. 
//
// Written by David Luff, started 2005.
//
// Copyright (C) 2005 - David C Luff - david.luff@nottingham.ac.uk
//
// 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
//
// $Id$

#ifndef _KLN89_HXX
#define _KLN89_HXX

#include <Instrumentation/dclgps.hxx>
#include "kln89_page.hxx"

const int KLN89MapScales[2][21] = {{1, 2, 3, 5, 7, 10, 12, 15, 17, 20, 25, 30, 40, 60, 80, 100, 120, 160, 240, 320, 500},
                                       {2, 4, 6, 9, 13, 18, 22, 28, 32, 37, 46, 55, 75, 110, 150, 185, 220, 300, 440, 600, 925}};

enum KLN89Mode {
        KLN89_MODE_DISP,
        KLN89_MODE_CRSR
};

/*
const char* KLN89TimeCodes[20] = { "UTC", "GST", "GDT", "ATS", "ATD", "EST", "EDT", "CST", "CDT", "MST", 
                                   "MDT", "PST", "PDT", "AKS", "AKD", "HAS", "HAD", "SST", "SDT", "LCL" };
*/

// Used for storing airport town and county mapped by ID, since currently FG does not store this
typedef map<string, string> airport_id_str_map_type;
typedef airport_id_str_map_type::iterator airport_id_str_map_iterator;

class KLN89 : public DCLGPS {
        
        friend class KLN89Page;
        friend class KLN89AptPage;
        friend class KLN89VorPage;
        friend class KLN89NDBPage;
        friend class KLN89IntPage;
        friend class KLN89UsrPage;
        friend class KLN89ActPage;
        friend class KLN89NavPage;
        friend class KLN89FplPage;
        friend class KLN89CalPage;
        friend class KLN89SetPage;
        friend class KLN89OthPage;
        friend class KLN89DirPage;
        friend class KLN89NrstPage;
        
public:
        KLN89(RenderArea2D* instrument);
        ~KLN89();
        
        void bind();
        void unbind();
        void update(double dt);
        
        inline void SetTurnAnticipation(bool b) { _turnAnticipationEnabled = b; }
        inline bool GetTurnAnticipation() { return(_turnAnticipationEnabled); }

        inline void SetSuaAlertEnabled(bool b) { _suaAlertEnabled = b; }
        inline bool GetSuaAlertEnabled() { return(_suaAlertEnabled); }
        
        inline void SetAltAlertEnabled(bool b) { _altAlertEnabled = b; }
        inline bool GetAltAlertEnabled() { return(_altAlertEnabled); }
        
        inline bool GetMsgAlert() const { return(!_messageStack.empty()); }
        
        void Knob1Right1();
        void Knob1Left1();
        void Knob2Right1();
        void Knob2Left1();
        void CrsrPressed();
        void EntPressed();
        void ClrPressed();
        void DtoPressed();
        void NrstPressed();
        void AltPressed();
        void OBSPressed();
        void MsgPressed();
        
        void CreateDefaultFlightPlans();

private:
        //----------------------- Drawing functions which take CHARACTER units -------------------------
        // Render string s in display field field at position x, y
        // WHERE POSITION IS IN CHARACTER UNITS!
        // zero y at bottom?
        // invert: -1 => no inversion, 0 -> n => 1 char - s[invert] gets inverted, 99 => entire string gets inverted 
        void DrawText(const string& s, int field, int px, int py, bool bold = false, int invert = -1);
        
        void DrawLatitude(double d, int field, int px, int py);
        void DrawLongitude(double d, int field, int px, int py);

        // Draw a frequency as xxx.xx
        void DrawFreq(double d, int field, int px, int py);
        
        // Draw a time in seconds as hh:mm
        // NOTE: px is RIGHT JUSTIFIED!
        void DrawTime(double time, int field, int px, int py);

        // Draw an integer heading, where px specifies the position of the degrees sign at the RIGHT of the value.
        void DrawHeading(int h, int field, int px, int py);
        
        // Draw a distance spec'd as nm as an integer (TODO - may need 1 decimal place if < 100) where px specifies RHS of units.
        // Some uses definately don't want decimal place though (as at present), so would have to be arg.
        void DrawDist(double d, int field, int px, int py);
        
        // Draw a speed specifed in knots.  px is RHS of the units.  Can draw up to 2 decimal places.
        void DrawSpeed(double v, int field, int px, int py, int decimals = 0);
        
        void Underline(int field, int px, int py, int len);
        
        // Render a char at a given position as above (position in CHARACTER units)
        void DrawChar(char c, int field, int px, int py, bool bold = false, bool invert = false);
        void DrawSpecialChar(char c, int field, int cx, int cy, bool bold = false);
        
        // Draws the dir/dist field at the bottom of the main field
        void DrawDirDistField(double lat, double lon, int field, int px, int py, bool to_flag = true, bool cursel = false);
        //
        //--------------------------------- end char units -----------------------------------------------
        
        //----------------------- Drawing functions which take PIXEL units ------------------------------
        //
        // Takes instrument *pixel* co-ordinates NOT character units
        // Position is specified by the bottom of the *visible* portion, by default the left position unless align_right is true.
        // The return value is the pixel width of the visible portion
        int DrawSmallChar(char c, int x, int y, bool align_right = false);
        
        void DrawFreeChar(char c, int x, int y, bool draw_background = false);
        //
        //----------------------------------- end pixel unit functions -----------------------------------
        
        void DrawDivider();
        
        void DrawEnt(int field = 1, int px = 0, int py = 1);
        
        void DrawMessageAlert();
        
        void DrawKPH(int field, int cx, int cy);
        
        void DrawDTO(int field, int cx, int cy);
        
        // Draw the bar that indicates which page we're on (zero-based)
        void DrawBar(int page);
        
        void DrawCDI();
        
        void DrawLegTail(int py);
        void DrawLongLegTail(int py);
        void DrawHalfLegTail(int py);
        
        void UpdateMapHeading();
        
        // Draw the moving map
        // Apt, VOR and SUA drawing can be suspended by setting draw_avs to false, without affecting the stored drawing preference state.
        void DrawMap(bool draw_avs = true);
        
        // Set whether the display should be draw pixelated (more primatives, but might be closer to real-life)
        // or not (in which case it is assumed that pixels are square and can be merged into quads).
        bool _pixelated;
        
        // Flashing output should be hidden when blink is true 
        bool _blink;
        
        double _cum_dt;
        
        // In Crsr mode, CRSR pressed events are passed to the active page, in disp mode they change which page is active
        KLN89Mode _mode;
        // And the facility to save a mode
        KLN89Mode _lastMode;
        
        // Increment/Decrement a character in the KLN89 A-Z,0-9 scheme.  
        // Set gap to true to get a space between A and 9 when wrapping, set wrap to false to disable wrap.
        char IncChar(char c, bool gap = false, bool wrap = true);
        char DecChar(char c, bool gap = false, bool wrap = true);
        
        // Hackish
        int _entJump;   // The page to jump back to if ent is pressed.  -1 indicates no jump
        bool _entRestoreCrsr;   // Indicates that pressing ENT at this point should restore cursor mode
        
        // Misc pages
        // Direct To
        GPSPage* _dir_page;
        // Nearest
        GPSPage* _nrst_page;
        
        // Moving-map display stuff
        int _mapOrientation;    // 0 => North (true) up, 1 => DTK up, 2 => TK up, 3 => heading up (only when connected to external heading source).
        double _mapHeading;             // Degrees.  The actual map heading gets updated at a lower frequency than DrawMap() is called at, hence we need to store it.
        double _mapHeadingUpdateTimer;  // Timer to determine when to update the above.
        bool _mapScaleAuto;             // Indicates that map should autoscale when true.
        int _mapScaleIndex;             // Index into array of available map scales.
        int _mapScaleUnits;             // 0 => nm, 1 => km.
        double _mapScale;       // nm or km from aircraft position to top of map.
                                                // Note that aircraft position differs depending on orientation, but 'scale' retains the same meaning,
                                                // so the scale per pixel alters to suit the defined scale when the rendered aircraft position changes.
        bool _drawSUA;  // special user airspace
        bool _drawVOR;
        bool _drawApt;
        
        // Convert map to instrument coordinates
        void MapToInstrument(int &x, int &y);
        
        // The following map drawing functions all take MAP co-ordinates, NOT instrument co-ordinates!
        
        // Draw the diamond style of user pos
        void DrawUser1(int x, int y);

        // Draw the airplane style of user pos
        void DrawUser2(int x, int y);
        
        // Draw an airport symbol on the moving map
        void DrawApt(int x, int y);
        
        // Draw a waypoint on the moving map
        void DrawWaypoint(int x, int y);
        
        // Draw a VOR on the moving map
        void DrawVOR(int x, int y);
        
        // Draw an airport or waypoint label on the moving map
        // Specify position by the map pixel co-ordinate of the left or right, bottom, of the *visible* portion of the label.
        // The black background quad will automatically overlap this by 1 pixel.
        void DrawLabel(const string& s, int x1, int y1, bool right_align = false);
        
        int GetLabelQuadrant(double h);
        int GetLabelQuadrant(double h1, double h2);
        
        // Draw a line on the moving map
        void DrawLine(int x1, int y1, int x2, int y2);
        
        // Draw normal sized text on the moving map
        void DrawMapText(const string& s, int x, int y, bool draw_background = false);
        
        void DrawMapUpArrow(int x, int y);
        
        // Draw a Quad on the moving map
        void DrawMapQuad(int x1, int y1, int x2, int y2, bool invert = false);
        
        // Airport town and state mapped by ID, since currently FG does not store this
        airport_id_str_map_type _airportTowns;
        airport_id_str_map_type _airportStates;
        
        // NOTE - It is a deliberate decision not to have a proper message page class,
        // since button events get directed to the page that was active before the
        // message was displayed, not the message page itself.
        bool _dispMsg;  // Set true while the message page is being displayed
};

#endif  // _KLN89_HXX