# vim: set foldmethod=marker foldmarker={{{,}}} :

var displayClass = {

    new: func(device) {

# the contructor {{{

        var m = { parents: [ displayClass ] };

        m.display = canvas.new({

                "name"      : device.name,

                "size"      : [1280, 1280],

                "view"      : [1024, 768],

                "mipmapping": 1

        });

        m.display.addPlacement({

                "node": device.data['screen-object'] != nil ? device.data['screen-object'] : "Screen",

                "parent": device.name

            });

        m.display.setColorBackground(0,0,0);

        m.role = device.role;

        m.device = device;

        m.screenElements = {};

        m.screen = m.display

            .createGroup()

            .show();

        m.timers = {};

        # Softkeys revert to the previous level after 45 seconds of inactivity.

        m.softkeys_inactivity_delay = 45;

        var groups = {

            show : [

                'Header',

                'SoftKeysTexts',

                'COMM',

                'NAV',

                'nav-freq-switch',

                'comm-freq-switch',

            ],

            text: [

                'nav1-standby-freq', 'nav1-selected-freq', 'nav1-id',

                'nav2-standby-freq', 'nav2-selected-freq', 'nav2-id',

                'comm1-standby-freq', 'comm1-selected-freq',

                'comm2-standby-freq', 'comm2-selected-freq',

            ],

            hide : [ 'Failures', 'NAV-COMM-Failures' ],

            clip: [ ],

        };

        for (var k = 0; k < 12; k += 1) {

            append(groups.text, sprintf("SoftKey%02i-text", k));

            append(groups.show, sprintf("SoftKey%02i-bg", k));

        }

        if (m.device.role == 'PFD') {

            append(groups.show,

# {{{

                'XPDR-TIME',

                'FlightInstruments',

                'Horizon',

                'bankPointer',

                'VSI',

                'Rose',

                'Heading-bug',

                'PFD-Widgets',

                'Trends',

                'Airspeed-Trend-Indicator',

                'Altitude-Trend-Indicator',

                'OAT',

                'IAS-bg',

                'TAS',

                'GSPD',

                'BARO-bg',

                'SlipSkid',

                'VDI', 'GS-ILS', 'VDI-scale',

# }}}

            );

            append(groups.hide,

# {{{

                'EIS',

                'CDI',

                'OMI', 'MarkerBG', 'MarkerText',

                'NAV1-pointer', 'NAV1-CDI', 'NAV1-FROM', 'NAV1-TO',

                'NAV2-pointer', 'NAV2-CDI', 'NAV2-FROM', 'NAV2-TO',

                'GPS-pointer', 'GPS-CDI', 'GPS-CTI', 'GPS-CTI-diamond', 'GPS-FROM', 'GPS-TO',

                'BRG1-pointer',

                'BRG2-pointer',

                'SelectedHDG-bg',

                'SelectedHDG-bgtext',

                'SelectedHDG-text',

                'SelectedCRS-bg',

                'SelectedCRS-bgtext',

                'SelectedCRS-text',

                'SelectedALT', 'SelectedALT-bug', 'SelectedALT-bg', 'SelectedALT-symbol',

                'TAS',

                'GSPD',

                'WindData',

                'Reversionnary',

                'Annunciation',

                'Comparator',

                'BRG1',

                'BRG2',

                'DME1',

                'PFD-Map-bg',

                'PFD-Multilines',

                'MapOrientation',

                'WindData', 'WindData-OPTN1', 'WindData-OPTN2', 'WindData-OPTN1-HDG', 'WindData-OPTN2-symbol', 'WindData-OPTN2-headwind', 'WindData-OPTN2-crosswind', 'WindData-NODATA',

                'AOA', 'AOA-needle', 'AOA-text', 'AOA-approach',

                'MFD-navbox',

                'Traffic',

                'VDI-type-bg',

# }}}

            );

            append(groups.clip,

# {{{

                'SpeedLint1',

                'SpeedTape',

                'LintAlt',

                'AltLint00011',

                'PitchScale',

# }}}

            );

            append(groups.text,

# {{{

                'SelectedALT-text',

                'TAS-text',

                'GSPD-text',

                'TIME-text', 'TIME-REF-text',

                'OAT-text',

                'VSIText',

                'Speed110',

                'Alt11100',

                'HDG-text',

                'BARO-text',

                'CDI-SRC-text', 'CDI-GPS-ANN-text', 'CDI-GPS-XTK-text',

                'BRG1-pointer', 'BRG1-SRC-text', 'BRG1-DST-text', 'BRG1-WPID-text',

                'BRG2-pointer', 'BRG2-SRC-text', 'BRG2-DST-text', 'BRG2-WPID-text',

                'WindData-OPTN1-HDG-text', 'WindData-OPTN1-SPD-text',

                'WindData-OPTN2-crosswind-text', 'WindData-OPTN2-headwind-text',

                'XPDR-MODE-text', 'XPDR-DIGIT-3-text', 'XPDR-DIGIT-2-text', 'XPDR-DIGIT-1-text', 'XPDR-DIGIT-0-text',

                'ETE', 'ETE-text', 'DIS', 'DIS-text', 'LEG-text',

                'LATMOD-Armed-text', 'LATMOD-Active-text',

                'AP-Status-text', 'YD-Status-text',

                'VERMOD-Active-text', 'VERMOD-Armed-text', 'VERMOD-Reference-text',

                'AltBigC', 'AltSmallC'

# }}}

            );

            for (var place = 1; place <= 6; place +=1) {

                append(groups.text,

                    'AltBigU' ~ place,

                    'AltSmallU' ~ place,

                    'AltBigD' ~ place,

                    'AltSmallD' ~ place

                );

            }

            canvas.parsesvg(m.screen, data.zkv1000_reldir ~ 'Models/PFD.svg');

        }

        else {

            var eis_file = eis.getValue('type');

            if (eis_file == nil)

                eis_file = eis.getValue('file');

            if (eis_file != nil) {

                if (find('/', eis_file) == -1)

                    eis_file = data.zkv1000_dir ~ 'Nasal/EIS/' ~ eis_file ~ '.nas';

                elsif (split('/', eis_file)[0] == 'Aircraft') {

                    var path = split('/', eis_file);

                    if (getprop('/sim/fg-aircraft') != nil) {

                        foreach (var fg_aircraft; props.globals.getNode('/sim').getChildren('fg-aircraft')) {

                            eis_file = fg_aircraft.getValue();

                            for (var i = 1; i < size(path); i += 1)

                                eis_file ~= '/' ~ path[i];

                            if (io.stat(eis_file) != nil)

                                break;

                        }

                    }

                    else

                        eis_file = getprop('/sim/fg-root') ~ '/' ~ eis_file;

                }

            }

            else

                eis_file = data.zkv1000_dir ~ 'Nasal/EIS/none.nas';

            if (io.stat(eis_file) == nil

            and print(eis_file ~ ' not found'))

                eis_file = data.zkv1000_dir ~ 'Nasal/EIS/none.nas';

            io.load_nasal(eis_file, 'zkv1000');

            if (contains(m.parents[0], 'showEIS'))

                m.showEIS(groups);

            append(groups.hide, 'PFD-navbox', 'ETE', 'ETE-text', 'DIS', 'DIS-text', 'LEG-text');

            for (var i=1; i <= 4; i+=1)

                foreach (var t; ['ID', 'VAL'])

                    append(groups.text, 'DATA-FIELD' ~ i ~ '-' ~ t ~ '-text');

        }

        canvas.parsesvg(m.screen, data.zkv1000_reldir ~ 'Models/softkeys.svg');

        canvas.parsesvg(m.screen, data.zkv1000_reldir ~ 'Models/header-nav-comm.svg');

        m.loadGroup(groups);

        if (m.device.role == 'PFD') {

            m.device.data.aoa = 0;

            m.device.data['aoa-auto'] = 0;

            m.device.data.mapclip = {

                top: math.ceil(m.screenElements['PFD-Map-bg'].getTransformedBounds()[1]) - 1,

                right: math.ceil(m.screenElements['PFD-Map-bg'].getTransformedBounds()[2]) - 1,

                bottom: math.ceil(m.screenElements['PFD-Map-bg'].getTransformedBounds()[3]) - 1,

                left: math.ceil(m.screenElements['PFD-Map-bg'].getTransformedBounds()[0]) - 1,

            };

        }

        else {

            m.device.data.mapclip = {

                top: math.ceil(m.screenElements['Header'].getTransformedBounds()[3]),

                right: m.display.get('view[0]'),

                bottom: math.ceil(m.screenElements['SoftKeysTexts'].getTransformedBounds()[1]),

                left: contains(m.screenElements, 'EIS') ? math.ceil(m.screenElements['EIS'].getTransformedBounds()[2]) : 0,

            };

        }

        m.navbox = {

# {{{ the data to show info in navbox

            DTK: [func {

                var dtk = getprop('/instrumentation/gps/wp/wp[1]/desired-course-deg');

                if (dtk == nil)

                    return '---°';

                else

                    return sprintf('%03i°', dtk);

            }, 'Desired Track'],

            ETE: [func {

                if (data.fpSize == 0) return '--:--';

                var eta = getprop('/autopilot/route-manager/wp/eta');

                return sprintf('%5s', eta != nil ? eta : '--:--');

            }, 'Estimated Time Enroute'],

            TDR: [func {

                var unit = units.distance.from_nm == 1 ? 'NM' : 'km';

                if (data.fpSize == 0) return '---' ~ unit;

                var dist = getprop('/autopilot/route-manager/distance-remaining-nm') * units.distance.from_nm;

                if (dist != nil)

                    return sprintf(dist < 100 ? '%2.1f%s' : '%3i%s', dist, unit);

                else

                    return '---' ~ unit;

            }, 'Total Distance Remaining'],

            DIS: [func {

                var unit = units.distance.from_nm == 1 ? 'NM' : 'km';

                if (data.fpSize == 0) return '---' ~ unit;

                var dist = getprop('/autopilot/route-manager/wp/dist') * units.distance.from_nm;

                if (dist != nil)

                    return sprintf(dist < 100 ? '%2.1f%s' : '%3i%s', dist, unit);

                else

                    return '---' ~ unit;

            }, 'Distance remaining'],

            LEG: [func {

                if (data.fpSize == 0) return '';

                var route = m.device.map.layers.route;

                var wp = route.flightPlan[route.currentLeg.index];

                return sprintf(' %s %s %s', wp[0].name, utf8.chstr(9658), wp[1].name);

            }, ''], # not listed in MFD menu, on PFD only the leg is shown not the item

            LDG: [func {

                var eteSeconds = getprop('/autopilot/route-manager/ete');

                var eteHours = math.floor(eteSeconds / 3600);

                var eteMinutes = int((eteSeconds - (eteHours * 3600)) / 60);

                return sprintf(eteHours > 99 ? '--:--' : '%02i:%02i', eteHours, eteMinutes);

            }, 'ETA at Final Destination'],

            END: [func {

                var total_fuel = getprop('/consumables/fuel/total-fuel-gals');

                var gs = getprop('/velocities/groundspeed-kt');

                var consumption = 0;

                foreach(var engine; props.globals.getNode('/engines').getChildren('engine')) {

                    var ec = engine.getValue('fuel-flow-gph');

                    consumption += ec != nil ? ec : 0;

                }

                var unit = units.distance.from_nm == 1 ? 'NM' : 'km';

                if (consumption > 0 and gs > 0)

                    return sprintf('%3i%s', (total_fuel * gs) / consumption * units.distance.from_nm, unit);

                else

                    return '---' ~ unit;

            }, 'Endurance'],

            ETA: [func {

                var eteSeconds = getprop('/autopilot/route-manager/ete');

                string.scanf(data.time, '%02u:%02u:%02u', var eta = []);

                var eteHours = math.floor(eteSeconds / 3600);

                if (eteHours > 24)

                    return '--:--';

                eta[1] += int((eteSeconds - (eteHours * 3600)) / 60);

                if (eta[1] > 59) {

                    eta[1] -= 60;

                    eta[0] += 1;

                }

                eta[0] += eteHours;

                if (eta[0] > 23)

                    eta[0] -= 24;

                return sprintf('%02i:%02i', eta[0], eta[1]);

            }, 'Estimated Time of Arrival'],

            GS:  [func return sprintf('%3i%s', getprop('/velocities/groundspeed-kt') * units.speed.from_kt,

                                      units.speed.from_kt == 1 ? 'KT' : 'km/h'),

                 'Ground Speed'],

            TRK: [func return sprintf('%03i°', getprop('/orientation/track-deg')), 'Track'],

            TAS: [func return sprintf('%i%s', getprop('/instrumentation/airspeed-indicator/true-speed-kt') * units.speed.from_kt,

                                      units.speed.from_kt == 1 ? 'KT' : 'km/h' == 1),

                 'True Air Speed'],

            FOB: [func return sprintf('%3ilbs', getprop('/consumables/fuel/total-fuel-lbs')), 'Fuel on Board'],

            XTK: [func {

                var xtk = nil;

                var source = cdi.getValue('source');

                if (source == 'NAV1')

                    var xtk = abs(getprop('/instrumentation/nav[0]/crosstrack-error-m')) * units.distance.from_m;

                elsif (source == 'NAV2')

                    var xtk = abs(getprop('/instrumentation/nav[1]/crosstrack-error-m')) * units.distance.from_m;

                elsif (source == 'GPS')

                    var xtk = abs(getprop('/instrumentation/gps/wp/wp[1]/course-error-nm')) * units.distance.from_nm;

                var unit = units.distance.from_nm = 1 ? 'NM' : 'km';

                if (xtk == nil)

                    return ' ---' ~ unit;

                elsif (xtk > 99.9)

                    return ' ++.+' ~ unit;

                else

                    return sprintf('%2.1f%s', xtk, unit);

            }, 'Crosstrack Error'],

            MSA: [func {

                data._msa_spd        = getprop('/velocities/groundspeed-kt');

                data._msa_track      = getprop('/orientation/track-deg');

                if (! contains(data.timers, 'MSA_geodinfo')) {

                    data._msa_alt         = -1;

                    data._msa_point       = 1;

                    data._msa_alt_intern  = 0;

                    data.timers.MSA_geodinfo = maketimer(0, func {

                        var geo = greatCircleMove(

                                data._msa_track,

                                (data._msa_spd / 12) / 10 * data._msa_point);

                        var _geodinfo = geodinfo(geo.lat, geo.lon, 10000);

                        if (_geodinfo != nil)

                            if (data._msa_alt_intern < _geodinfo[0]) data._msa_alt_intern = _geodinfo[0];

                        data._msa_point += 1;

                        if (data._msa_point > 10) {

                            data._msa_alt         = math.round((1000 + data._msa_alt_intern * units.altitude.from_m) / 100) * 100;

                            data._msa_point       = 0;

                            data._msa_alt_intern  = 0;

                            data.timers.MSA_geodinfo.stop();

                        }

                    });

                }

                data.timers.MSA_geodinfo.start();

                return data._msa_alt == -1 ? '-----ft' : sprintf('%5i%s', data._msa_alt, units.altitude.from_m == 1 ? 'm' : 'ft');

            }, 'Minimum Safe Altitude'],

#            BRG: [func return '---°', 'Bearing'],

#            ESA: [func return '-----', 'Enroute Safe Altitude'],

#            ISA: [func return '-----', 'ISA Relative Temperature'],

#            TKE: [func return ' ---°', 'Track Angle Error'],

#            VSR: [func return ' ----', 'Vertical Speed Required'],

# }}}

        };

        if (m.device.role == 'PFD')

            foreach (var item; keys(m.navbox))

                if (item != 'LEG' and item != 'DIS' and item != 'ETE')

                    delete(m.navbox, item);

        return m;

    },

#}}}

    off: func {

        me.parents[0]._updateRadio = func; # because of the settimers...

        me.parents[0].updateEIS = func;

        foreach(var timer; keys(me.timers)) {

            me.timers[timer].stop();

            delete(me.timers, timer);

        }

        foreach (var e; keys(me.screenElements)) {

            if (typeof(me.screenElements[e]) != 'nil')

                me.screenElements[e].hide();

            delete(me.screenElements, e);

        }

        foreach (var e; keys(me.screenElements)) {

            if (typeof(me.screenElements[e]) != 'nil')

                me.screenElements[e].hide();

            delete(me.screenElements, e);

        }

        foreach (var e; keys(me.screenElements)) {

            if (typeof(me.screenElements[e]) != 'nil')

                me.screenElements[e].hide();

            delete(me.screenElements, e);

        }

        me.screen.setVisible(0);

        settimer(func {

                me.screen.removeAllChildren();

                me.screen.del();

                me.display.del();

        }, 0.1);

    },

# temporary Widget Display for HDG and CRS modification {{{

    temporaryWidgetDisplay : {},

    timerTrigger : func {

        var now = systime();

        foreach (var id; keys(me.temporaryWidgetDisplay)) {

            if (me.temporaryWidgetDisplay[id] < now) {

                me.screenElements[id].hide();

                delete(me.temporaryWidgetDisplay, id);

            }

        }

    },

    addTimer : func (duration, element) {

        if (typeof(element) == 'scalar')

            element = [ element ];

        var end = systime() + duration;

        foreach (var e; element)

            me.temporaryWidgetDisplay[e] = end;

    },

#}}}

    showInitProgress : func {

#{{{

        if (me.device.role == 'PFD') {

            me.timers.updateAI     = maketimer(0.1, me, me.updateAI     );

            me.timers.updateVSI    = maketimer(0.1, me, me.updateVSI    );

            me.timers.updateIAS    = maketimer(0.1, me, me.updateIAS    );

            me.timers.updateALT    = maketimer(0.2, me, me.updateALT    );

            me.timers.updateHSI    = maketimer(0.2, me, me.updateHSI    );

            me.timers.updateTIME   = maketimer(1.0, me, me.updateTIME   );

            me.timers.updateOAT    = maketimer(3.0, me, me.updateOAT    );

            me.timers.updateTAS    = maketimer(0.5, me, me.updateTAS    );

            me.timers.updateBRG    = maketimer(0.5, me, me.updateBRG    );

            me.timers.updateXPDR   = maketimer(0,   me, me.updateXPDR   ); me.timers.updateXPDR.singleShot=1;

            me.timers.updateBARO   = maketimer(0,   me, me.updateBARO   ); me.timers.updateBARO.singleShot=1;

            me.timers.updateOMI    = maketimer(1.0, me, me.updateOMI    );

            me.timers.timerTrigger = maketimer(1.0, me, me.timerTrigger );

            me.timers.updateAOA    = maketimer(0.1, me, me.updateAOA    );    me.timers.updateAOA.singleShot=1;

            me.timers.updateCDI    = maketimer(0.3, me, me.updateCDI    );    me.timers.updateCDI.singleShot=1;

            me.timers.updateWindData = maketimer(0.5, me, me.updateWindData); me.timers.updateWindData.singleShot=1;

            me.screenElements['Heading-bug'].setRotation(int(afcs.getValue('heading-bug-deg')) * D2R);

            me.screen.show();

            me.device.buttons.MENU = me.device.buttons.GlobalParams;

        }

        else {

            me.updateEIS();

            io.load_nasal(data.zkv1000_dir ~ 'Nasal/MFD.pages.nas', 'zkv1000');

            me['page selected'] = 0;

            me.setMFDPages();

            me.device.buttons.MENU = me.device.buttons.MapMenu;

        }

        me.updateNAV({auto:'nav', tune: radios.getNode('nav-tune').getValue()});

        me.updateCOMM({auto:'comm', tune: radios.getNode('comm-tune').getValue()});

        me.softkeys_inactivity();

        me.updateSoftKeys();

        me.timers.updateNavigationBox = maketimer(me.device.role == 'MFD' ? 0.6 : 0.3, me, me.updateNavigationBox);

        foreach (var timer; keys(me.timers))

            me.timers[timer].start();

        me.timers.updateGS = maketimer(0.2, me, me.updateGS);

    },

#}}}

    colors : {

# set of predefined colors {{{

        green : [0, 1, 0],

        white : [1, 1, 1],

        black : [0, 0, 0],

        lightblue : [0, 1, 1],

        darkblue : [0, 0, 1],

        red : [1, 0, 0],

        magenta : [1, 0, 1],

        yellow : [1, 1, 0],

        lightgrey : [0.5, 0.5, 0.5],

    },

#}}}

    loadGroup : func (h) {

#{{{

        if (typeof(h) != 'hash') {

            msg_dbg(sprintf("%s need a hash, but get a %s from %s",

                    caller(0)[0],

                    typeof(h),

                    caller(1)[0]));

            return;

        }

        var setMethod = func (e, t) {

            if (t == 'hide')

                me.screenElements[e].hide();

            elsif (t == 'show')

                me.screenElements[e].show();

            elsif (t == 'rot' or t == 'trans') {

                if (! contains(me.screenElements[e], t))

                    me.screenElements[e][t] = me.screenElements[e].createTransform();

            }

            elsif (t == 'clip') {

                if (contains(me.clips, e))

                    me.screenElements[e].set("clip", me.clips[e]);

                else

                    logprint(LOG_WARN, 'no defined clip for ' ~ e);

            }

            elsif (t == 'text') {

                if (contains(me.texts, e)) {

                    if (contains(me.texts[e], 'alignment'))

                        me.screenElements[e].setAlignment(me.texts[e].alignment);

                    if (contains(me.texts[e], 'default'))

                        me.screenElements[e].setText(me.texts[e].default);

                    if (contains(me.texts[e], 'color'))

                        me.screenElements[e].setColor(me.texts[e].color);

                    if (contains(me.texts[e], 'visible'))

                        me.screenElements[e].setVisible(me.texts[e].visible);

                }

                else

                    logprint(LOG_DEBUG, 'no text format for ' ~ e);

            }

            else

                logprint(LOG_WARN, 'unknown method ' ~ t);

        };

        foreach (var todo; keys(h)) {

            if (typeof(h[todo]) != 'vector') h[todo] = [ h[todo] ];

            foreach (var id; h[todo]) {

                if (! contains(me.screenElements, id)) {

                    me.screenElements[id] = me.screen.getElementById(id);

                    if (me.screenElements[id] != nil)

                        setMethod(id, todo);

                    else

                        logprint(LOG_WARN, 'SVG ID ' ~ id ~ ' not found');

                }

                else

                    setMethod(id, todo);

            }

        }

        if (me.device.role == 'PFD') {

            var Vsource = me.screen.getElementById('Vspeed');

            foreach (var V; keys(data.Vspeeds)) {

                me.screenElements[V] = me.screen.createChild('group', V);

                props.copy( Vsource.parents[1]._node, me.screenElements[V].parents[1]._node);

                me.screenElements[V].parents[1]._node.setValue('id', V);

                me.screenElements[V].parents[1]._node.setValue('text/id', V);

                me.screenElements[V].parents[1]._node.setValue('text/text', V);

            }

            Vsource.hide();

            Vsource.removeAllChildren();

            Vsource.del();

        }

    },

#}}}

    clips : {

#{{{

        PitchScale   : "rect(70,664,370,256)",

        SpeedLint1   : "rect(252,226,318,204)",

        SpeedTape    : "rect(115,239,455,156)",

        LintAlt      : "rect(115,808,455,704)",

        AltLint00011 : "rect(252,804,318,771)",

    },

#}}}

    texts : {

#{{{

        VSIText : {

            alignment: "right-bottom", default : num('0'),

        },

        Speed110 : {

            alignment : 'right-bottom'

        },

        Alt11100 : {

            alignment:'right-bottom'

        },

        "HDG-text" : {

            default: '---°'

        },

        'nav1-standby-freq' : {

            color: [0, 1, 1],

        },

        'nav1-id' : {

            default: ''

        },

        'nav2-id' : {

            default: ''

        },

        'CDI-GPS-ANN-text' : {

            visible : 0

        },

        'CDI-GPS-XTK-text' : {

            visible : 0

        },

        'CDI-SRC-text' : {

            visible : 0

        },

        'BARO-text' : {

            alignment : 'left-bottom',

        },

        'LEG-text' : {

            alignment : 'center-center',

        },

#        'TAS-text' : {

#            alignment : 'right-bottom',

#        },

#        'GSPD-text' : {

#            alignment : 'right-bottom',

#        },

    },

#}}}

    softkeys_inactivity : func {

# automagically back to previous level after some delay {{{

        me.timers.softkeys_inactivity = maketimer (

            me.softkeys_inactivity_delay,

            func {

                pop(me.device.softkeys.path);

                me.updateSoftKeys();

            }, me);

        me.timers.softkeys_inactivity.singleShot = 1;

    },

#}}}

    setSoftKeyColor : func (n, active, implemented = 1, alert = 0) {

# set colors for active softkeys {{{

        var sftk = sprintf('SoftKey%02i-', n);

        if (active) {

            var bg = alert ? 1 : 0.5;

            me.screenElements[sftk ~ 'bg']

                .setColorFill(bg,bg,bg);

            me.screenElements[sftk ~ 'text']

                .setColor(0,0,0);

        }

        else {

            var tc = implemented ? 1 : 0.5;

            me.screenElements[sftk ~ 'bg']

                .setColorFill(0,0,0);

            me.screenElements[sftk ~ 'text']

                .setColor(tc,tc,tc);

        }

    },

#}}}

    updateNavigationBox : func {

# update Navigation Box on MFD and PFD header {{{

        var route = me.device.map.layers.route;

        data.fpSize = size(route.flightPlan);

        if (me.device.role == 'MFD') {

            for (var i=1; i<=4; i+=1)

                me.screenElements['DATA-FIELD' ~ i ~ '-VAL-text']

                    .setText(

                        me.navbox[me.screenElements['DATA-FIELD' ~ i ~ '-ID-text'].get('text')][0]()

                    );

        }

        else { # PFD

            var enroute = getprop('/autopilot/route-manager/current-wp') > -1;

            me.screenElements['ETE'].setVisible(enroute);

            me.screenElements['DIS'].setVisible(enroute);

            me.screenElements['ETE-text'].setVisible(enroute).setText(me.navbox.ETE[0]());

            me.screenElements['DIS-text'].setVisible(enroute).setText(me.navbox.DIS[0]());

            me.screenElements['LEG-text'].setVisible(enroute).setText(me.navbox.LEG[0]());

        }

    },

#}}}

    updateSoftKeys : func {

# update SoftKeys boxes {{{

        # on PFD the last boxes are always BACK and ALERTS

        if (me.device.role == 'PFD') {

            me.screenElements[sprintf("SoftKey%02i-text", 11)]

                .setText('ALERTS');

            if (size(me.device.softkeys.path) != 0)

                me.screenElements[sprintf("SoftKey%02i-text", 10)]

                    .setText('BACK')

                    .setColor(1,1,1);

        }

        var path = keyMap[me.device.role];

        var bindings = me.device.softkeys.bindings[me.device.role];

        var pathid = '';

        foreach (var p; me.device.softkeys.path) {

            path = path[p];

            pathid ~= p;

            if (contains(bindings, p))

                bindings = bindings[p];

        }

        # feeding with empty menus the first boxes

        var start = (contains(path, 'first')) ? path.first : 0;

        for (var k = 0; k < start; k+=1) {

            var sftk = sprintf("SoftKey%02i-", k);

            me.screenElements[sftk ~ 'text']

                .setText('');

            me.screenElements[sftk ~ 'bg']

                .setColorFill(0,0,0);

        }

        # filling with the content the next boxes

        forindex (var k; path.texts) {

            var i = k + start;

            me.screenElements[sprintf("SoftKey%02i-text", i)]

                .setText(path.texts[k]);

            me.setSoftKeyColor(i,

                    contains(me.device.softkeys.colored, pathid ~ path.texts[k]) and path.texts[k] != "",

                    contains(bindings, path.texts[k]) or (me.device.role == 'MFD' and path.texts[k] == 'BACK'));

        }

        # feeding the last boxes with empty string

        var end = (me.device.role == 'PFD') ? 10 : 12;

        if (size(path.texts) + start < end) {

            start = size(path.texts) + start;

            for (var k = start; k < end; k += 1) {

                var sftk = sprintf("SoftKey%02i-", k);

                me.screenElements[sftk ~ 'text']

                    .setText('');

                me.screenElements[sftk ~ 'bg']

                    .setColorFill(0,0,0);

            }

        }

        if (size(me.device.softkeys.path))

            me.timers.softkeys_inactivity.restart(me.softkeys_inactivity_delay);

        else

            me.timers.softkeys_inactivity.stop();

    },

#}}}

    updateAI: func(){

#{{{

        var pitch = data.pitch;

        var roll = data.roll;

        if (pitch > 80)

            pitch = 80;

        elsif (pitch < -80)

            pitch = -80;

        me.screenElements.Horizon

            .setCenter(459, 282.8 - 6.849 * pitch)

            .setRotation(-roll * D2R)

            .setTranslation(0, pitch * 6.849);

        me.screenElements.bankPointer

            .setRotation(-roll * D2R);

        me.screenElements['SlipSkid']

            .setTranslation(getprop("/instrumentation/slip-skid-ball/indicated-slip-skid") * 10, 0);

        me.screenElements['Traffic']

            .setVisible(data.tcas_level > 1);

    },

#}}}

    updateVSI: func () {

# animate VSI {{{

        var vsi = data.vsi;

        me.screenElements.VSIText

            .setText(num(math.round(vsi, 10)));

        var scale = units.vspeed.from_fpm == 1 ? 1 : 10;

        if (vsi > 4500 / scale)

            vsi = 4500 / scale;

        elsif (vsi < -4500 / scale)

            vsi = -4500 / scale;

        me.screenElements.VSI

            .setTranslation(0, vsi * -0.03465 * scale);

    },

#}}}

    updateIAS: func () {

# animates the IAS lint (PFD) {{{

        var ias = data.ias;

        if (ias >= 10)

            me.screenElements.Speed110

                .setText(sprintf("% 2u",num(math.floor(ias/10))));

        else

            me.screenElements.Speed110

                .setText('');

        me.screenElements.SpeedLint1

            .setTranslation(0,(math.mod(ias,10) + (ias >= 10)*10) * 36);

        me.screenElements.SpeedTape

            .setTranslation(0,ias * 5.711);

        if (ias > me._Vne and ! me._ias_already_exceeded) { # easier than .getColorFill

            me._ias_already_exceeded = 1;

            me.screenElements['IAS-bg']

                .setColorFill(1,0,0);

        }

        elsif (ias < me._Vne and me._ias_already_exceeded) { # easier than .getColorFill

            me._ias_already_exceeded = 0;

            me.screenElements['IAS-bg']

                .setColorFill(0,0,0);

        }

        foreach (var v; keys(data.Vspeeds)) {

            if (me.device.data[v ~ '-visible'] and abs(data.Vspeeds[v] - ias) < 30)

                me.screenElements[v]

                    .setTranslation(0, (ias - data.Vspeeds[v]) * 5.711)

                    .show();

            else

                me.screenElements[v]

                    .hide();

        }

        var Sy = 0;

        for (var i = 8; i >= 0; i -= 1)

            me._last_ias_Sy[i+1] = me._last_ias_Sy[i];

        var now = systime();

        # estimated speed in 6s

        me._last_ias_Sy[0] = 6 * (ias - me._last_ias) / (now - me._last_ias_s);

        foreach (var _Sy; me._last_ias_Sy)

            Sy += _Sy;

        Sy /= 10;

        if (abs(Sy) > 30)

            Sy = 30 * abs(Sy)/Sy; # = -30 or 30

        me.screenElements['Airspeed-Trend-Indicator']

            .setScale(1,Sy)

            .setTranslation(0, -284.5 * (Sy - 1));

        me._last_ias = ias;

        me._last_ias_s = now;

    },

    _Vne : contains(data.Vspeeds, 'Vne') ? data.Vspeeds.Vne : 999,

    _last_ias : 0,

    _last_ias_s : systime(),

    _last_ias_Sy : [0,0,0,0,0,0,0,0,0,0],

    _ias_already_exceeded : 0,

#}}}

    updateTAS: func {

# updates the True Airspeed and GroundSpeed indicators {{{

        var unit = units.speed.from_kt == 1 ? 'KT' : 'km/h';

        me.screenElements['TAS-text']

            .setText(sprintf('%i%s', getprop('/instrumentation/airspeed-indicator/true-speed-kt') * units.speed.from_kt, unit));

        me.screenElements['GSPD-text']

            .setText(sprintf('%i%s', getprop('/velocities/groundspeed-kt') * units.speed.from_kt, unit));

    },

#}}}

    updateALT: func () {

# animates the altitude lint (PFD) {{{

        var alt = data.alt;

        if (alt < 0)

            me.screenElements.Alt11100

                .setText(sprintf("%3d",math.ceil(alt/100)));

        elsif (alt < 100)

            me.screenElements.Alt11100

                .setText('');

        else

            me.screenElements.Alt11100

                .setText(sprintf("%3i",math.floor(alt/100)));

        me.screenElements.AltLint00011

            .setTranslation(0,math.fmod(alt,100) * 1.24);

        # From Farmin/G1000 http://wiki.flightgear.org/Project_Farmin/FG1000

        if (alt> -1000 and alt< 1000000) {

            var Offset10 = 0;

            var Offset100 = 0;

            var Offset1000 = 0;

            if (alt< 0) {

                var Ne = 1;

                var alt= -alt;

            }

            else

                var Ne = 0;

            var Alt10       = math.mod(alt,100);

            var Alt100      = int(math.mod(alt/100,10));

            var Alt1000     = int(math.mod(alt/1000,10));

            var Alt10000    = int(math.mod(alt/10000,10));

            var Alt20       = math.mod(Alt10,20)/20;

            if (Alt10 >= 80)

                var Alt100 += Alt20;

            if (Alt10 >= 80 and Alt100 >= 9)

                var Alt1000 += Alt20;

            if (Alt10 >= 80 and Alt100 >= 9 and Alt1000 >= 9)

                var Alt10000 += Alt20;

            if (alt> 100)

                var Offset10 = 100;

            if (alt> 1000)

                var Offset100 = 10;

            if (alt> 10000)

                var Offset1000 = 10;

            if (!Ne) {

                me.screenElements.LintAlt.setTranslation(0,(math.mod(alt,100))*0.57375);

                var altCentral = (int(alt/100)*100);

            }

            elsif (Ne) {

                me.screenElements.LintAlt.setTranslation(0,(math.mod(alt,100))*-0.57375);

                var altCentral = -(int(alt/100)*100);

            }

            me.screenElements["AltBigC"].setText("");

            me.screenElements["AltSmallC"].setText("");

            for (var place = 1; place <= 6; place += 1) {

                var altUP = altCentral + (place*100);

                var offset = -30.078;

                if (altUP < 0) {

                    var altUP = -altUP;

                    var prefix = "-";

                    var offset += 15.039;

                }

                else

                    var prefix = "";

                if (altUP == 0) {

                    var AltBigUP    = "";

                    var AltSmallUP  = "0";

                }

                elsif (math.mod(altUP,500) == 0 and altUP != 0) {

                    var AltBigUP    = sprintf(prefix~"%1d", altUP);

                    var AltSmallUP  = "";

                }

                elsif (altUP < 1000 and (math.mod(altUP,500))) {

                    var AltBigUP    = "";

                    var AltSmallUP  = sprintf(prefix~"%1d", int(math.mod(altUP,1000)));

                    var offset = -30.078;

                }

                elsif ((altUP < 10000) and (altUP >= 1000) and (math.mod(altUP,500))) {

                    var AltBigUP    = sprintf(prefix~"%1d", int(altUP/1000));

                    var AltSmallUP  = sprintf("%1d", int(math.mod(altUP,1000)));

                    var offset += 15.039;

                }

                else {

                    var AltBigUP    = sprintf(prefix~"%1d", int(altUP/1000));

                    var mod = int(math.mod(altUP,1000));

                    var AltSmallUP  = sprintf("%1d", mod);

                    var offset += 30.078;

                }

                me.screenElements["AltBigU"~place].setText(AltBigUP);

                me.screenElements["AltSmallU"~place].setText(AltSmallUP);

                me.screenElements["AltSmallU"~place].setTranslation(offset,0);

                var altDOWN = altCentral - (place*100);

                var offset = -30.078;

                if (altDOWN < 0) {

                    var altDOWN = -altDOWN;

                    var prefix = "-";

                    var offset += 15.039;

                }

                else

                    var prefix = "";

                if (altDOWN == 0) {

                    var AltBigDOWN  = "";

                    var AltSmallDOWN    = "0";

                }

                elsif (math.mod(altDOWN,500) == 0 and altDOWN != 0) {

                    var AltBigDOWN  = sprintf(prefix~"%1d", altDOWN);

                    var AltSmallDOWN    = "";

                }

                elsif (altDOWN < 1000 and (math.mod(altDOWN,500))) {

                    var AltBigDOWN  = "";

                    var AltSmallDOWN    = sprintf(prefix~"%1d", int(math.mod(altDOWN,1000)));

                    var offset = -30.078;

                }

                elsif ((altDOWN < 10000) and (altDOWN >= 1000) and (math.mod(altDOWN,500))) {

                    var AltBigDOWN  = sprintf(prefix~"%1d", int(altDOWN/1000));

                    var AltSmallDOWN    = sprintf("%1d", int(math.mod(altDOWN,1000)));

                    var offset += 15.039;

                }

                else {

                    var AltBigDOWN  = sprintf(prefix~"%1d", int(altDOWN/1000));

                    var mod = int(math.mod(altDOWN,1000));

                    var AltSmallDOWN    = sprintf("%1d", mod);

                    var offset += 30.078;

                }

                me.screenElements["AltBigD"~place].setText(AltBigDOWN);

                me.screenElements["AltSmallD"~place].setText(AltSmallDOWN);

                me.screenElements["AltSmallD"~place].setTranslation(offset,0);

            }

        }

        me.updateSelectedALT();

        var Sy = 0;

        for (var i = 8; i >= 0; i -= 1)

            me._last_alt_Sy[i+1] = me._last_alt_Sy[i];

        var now = systime();

        # altitude in 6s

        me._last_alt_Sy[0] = .3 * (alt - me._last_alt_ft) / (now - me._last_alt_s); # scale = 1/20ft

        foreach (var _Sy; me._last_alt_Sy)

            Sy += _Sy;

        Sy /= 10;

        if (abs(Sy) > 15)

            Sy = 15 * abs(Sy)/Sy; # = -15 or 15

        me.screenElements['Altitude-Trend-Indicator']

            .setScale(1,Sy)

            .setTranslation(0, -284.5 * (Sy - 1));

        me._last_alt_ft = alt;

        me._last_alt_s = now;

    },

    _last_alt_ft : 0,

    _last_alt_Sy : [0,0,0,0,0,0,0,0,0,0],

    _last_alt_s  : systime(),

#}}}

    updateBARO : func () {

# update BARO widget {{{

        var fmt = data.settings.units.pressure == 'inhg' ? '%.2f%s' : '%i%s';

        me.screenElements['BARO-text']

            .setText(sprintf(fmt,

                        getprop('/instrumentation/altimeter/setting-' ~ data.settings.units.pressure),

                        data.settings.units.pressure == 'inhg' ? 'in' : 'hPa')

                );

    },

#}}}

    updateHSI : func () {

# rotates the compass (PFD) {{{

        var hdg = data.hdg;

        me.screenElements.Rose

            .setRotation(-hdg * D2R);

        me.screenElements['HDG-text']

            .setText(sprintf("%03u°", hdg));

    },

#}}}

    updateHDG : func () {

# moves the heading bug and display heading-deg for 3 seconds (PFD) {{{

        if (me.device.role == 'MFD')

            return;

        var hdg = afcs.getValue('heading-bug-deg');

        me.screenElements['Heading-bug']

            .setRotation(hdg * D2R);

        me.screenElements['SelectedHDG-bg']

            .show();

        me.screenElements['SelectedHDG-bgtext']

            .show();

        me.screenElements['SelectedHDG-text']

            .setText(sprintf('%03d°%s', hdg, ''))

            .show();

        me.addTimer(3, ['SelectedHDG-text', 'SelectedHDG-bgtext', 'SelectedHDG-bg']);

    },

#}}}

    updateCRS : func () {

# TODO: update display for NAV/GPS/BRG courses {{{

        if (me.device.role == 'MFD')

            return;

        var source = cdi.getValue('source');

        if (source == 'OFF')

            return;

        var crs = cdi.getValue('course');

        if (crs == nil)

            return;

        me.screenElements['SelectedCRS-bg']

            .show();

        me.screenElements['SelectedCRS-bgtext']

            .show();

        me.screenElements['SelectedCRS-text']

            .setText(sprintf('%03d°%s', crs, ''))

            .setColor(source == 'GPS' ? me.colors.magenta : me.colors.green)

            .show();

        me.addTimer(3, ['SelectedCRS-text', 'SelectedCRS-bgtext', 'SelectedCRS-bg']);

    },

#}}}

    updateSelectedALT : func {

# animation for altitude section, called via updatedALT {{{

        if (! me.screenElements['SelectedALT'].getVisible())

            return;

        var selected_alt = afcs.getValue('selected-alt-ft');

        var delta_alt = data.alt - selected_alt;

        if (abs(delta_alt) > 300)

            delta_alt = 300 * abs(delta_alt)/delta_alt;

        me.screenElements['SelectedALT-symbol']

            .setVisible(abs(delta_alt) > 100);

        me.screenElements['SelectedALT-bg']

            .setVisible(abs(delta_alt) > 100);

        me.screenElements['SelectedALT-text']

            .setText(sprintf("%i", selected_alt))

            .setVisible(abs(delta_alt) > 100);

        me.screenElements['SelectedALT-bug']

            .setTranslation(0, delta_alt * 0.567); # 170/300 = 0.567

    },

#}}}

    updateCDI : func {

# animation for CDI {{{

        var source = cdi.getValue('source');

        if (source == 'OFF') {

            foreach (var s; ['GPS', 'NAV1', 'NAV2'])

                foreach (var t; ['pointer', 'CDI'])

                    me.screenElements[s ~ '-' ~ t].hide();

            me.screenElements['CDI-GPS-ANN-text'].hide();

            me.screenElements['CDI-GPS-XTK-text'].hide();

            me.screenElements['CDI-SRC-text'].hide();

            me.screenElements['CDI'].hide();

        }

        else {

            var course = cdi.getValue('course');

            var rot = (course - data.hdg) * D2R;

            me.screenElements['CDI']

                .setRotation(rot)

                .show();

            me.screenElements['GPS-CTI']

                .setVisible(getprop('/instrumentation/gps/wp/wp[1]/valid'))

                .setRotation(getprop('/instrumentation/gps/wp/wp[1]/course-deviation-deg') * D2R);

            me.screenElements['GPS-CTI-diamond']

                .setVisible(getprop('/instrumentation/gps/wp/wp[1]/valid'))

                .setRotation(getprop('/instrumentation/gps/wp/wp[1]/course-deviation-deg') * D2R);

            foreach (var s; ['GPS', 'NAV1', 'NAV2']) {

                me.screenElements[s ~ '-pointer']

                    .setRotation(rot)

                    .setVisible(source == s);

                me.screenElements[s ~ '-CDI']

                    .setVisible(source == s);

                foreach (var f; ['FROM', 'TO'])

                    me.screenElements[s ~ '-' ~ f]

                        .setVisible(s == source and cdi.getValue(f ~ '-flag'));

                me.screenElements['CDI-SRC-text']

                    .setText(source)

                    .setColor(source == 'GPS' ? me.colors.magenta : me.colors.green)

                    .show();

            }

            var deflection = cdi.getValue('course-deflection');

            if (left(source, 3) == 'NAV') {

                var scale = deflection / 4;

                if (cdi.getValue('in-range') == 0)

                    me.screenElements['CDI-GPS-XTK-text']