diff --git a/Nasal/canvas/map/GRID.lcontroller b/Nasal/canvas/map/GRID.lcontroller new file mode 100644 index 000000000..ea8c36bf0 --- /dev/null +++ b/Nasal/canvas/map/GRID.lcontroller @@ -0,0 +1,103 @@ +# See: http://wiki.flightgear.org/MapStructure +# Class things: +var name = 'GRID'; +var parents = [SymbolLayer.Controller]; +var __self__ = caller(0)[0]; +SymbolLayer.Controller.add(name, __self__); +SymbolLayer.add(name, { + parents: [MultiSymbolLayer], + type: name, # Symbol type + df_controller: __self__, # controller to use by default -- this one + df_options: { # default configuration options + granularity_lon: 0.25, + granularity_lat: 0.25, + } +}); +var new = func(layer) { + var m = { + parents: [__self__], + layer: layer, + map: layer.map, + listeners: [], + last_lat: -999, + last_lon: -999, + last_range: -999, + last_result: [], + }; + layer.searcher._equals = func(l,r) 0; # TODO: create model objects instead? + + m.addVisibilityListener(); + return m; +}; +var del = func() { + foreach (var l; me.listeners) + removelistener(l); +}; + +var searchCmd = func() { + + var lines = []; + var delta_lon = me.layer.options.granularity_lon; + var delta_lat = me.layer.options.granularity_lat; + + # Find the nearest lat/lon line to the map position. If we were just displaying + # integer lat/lon lines, this would just be rounding. + var lat = delta_lat * math.round(me.layer.map.getLat() / delta_lat); + var lon = delta_lon * math.round(me.layer.map.getLon() / delta_lon); + var range = me.layer.map.getRange(); + + # Return early if no significant change in lat/lon/range - implies no additional + # grid lines required + if ((lat == me.last_lat) and (lon == me.last_lon) and (range == me.last_range)) return me.last_result; + + # Determine number of degrees of lat/lon we need to display based on range + # 60nm = 1 degree latitude, degree range for longitude is dependent on latitude. + var lon_range = math.ceil(geo.Coord.new(me.layer.map.getPosCoord()).apply_course_distance(90.0, range * globals.NM2M).lon() - lon) * 2; + var lat_range = math.ceil(range/60.0) * 2; + + for (var x = (lon - lon_range); x <= (lon + lon_range); x += delta_lon) { + var coords = []; + + # We could do a simple line from start to finish, but depending on projection, + # the line may not be straight. + for (var y = (lat - lat_range); y <= (lat + lat_range); y += delta_lat) { + append(coords, {lon:x, lat:y}); + } + + append(lines, { + id: x, + type: "lon", + path: coords, + equals: func(o){ + return (me.id == o.id and me.type == o.type); # We only display one line of each lat/lon + } + }); + } + + # Lines of latitude + for (var y = (lat - lat_range); y <= (lat + lat_range); y += delta_lat) { + var coords = []; + + # We could do a simple line from start to finish, but depending on projection, + # the line may not be straight. + for (var x = (lon - lon_range); x <= (lon + lon_range); x += delta_lon) { + append(coords, {lon:x, lat:y}); + } + + append(lines, { + id: y, + type: "lat", + path: coords, + equals: func(o){ + return (me.id == o.id and me.type == o.type); # We only display one line of each lat/lon + } + }); + } + + me.last_lat = lat; + me.last_lon = lon; + me.last_range = range; + me.last_result = lines; + + return lines; +}; diff --git a/Nasal/canvas/map/GRID.symbol b/Nasal/canvas/map/GRID.symbol new file mode 100644 index 000000000..f7cf80434 --- /dev/null +++ b/Nasal/canvas/map/GRID.symbol @@ -0,0 +1,19 @@ +# See: http://wiki.flightgear.org/MapStructure + +# Class things: +var name = 'GRID'; +var parents = [LineSymbol]; +var __self__ = caller(0)[0]; +LineSymbol.makeinstance( name, __self__ ); + +SymbolLayer.get(name).df_style = { # style to use by default + line_width: 1, + color: [0.5,0.5,0.5], + dash_array: [5,15,5,15], +}; + +var init = func { + me.element.setColor(me.layer.style.color) + .setStrokeLineWidth(me.layer.style.line_width) + .setStrokeDashArray(me.layer.style.dash_array); +};