markus/lifo-dijkstraserv
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Add basic support for city outlines

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Use with load_geojson(
	"Cities (outline, demo)",
	"./geojson/cities_demo.json",
	"outline",
	"black",
	1,
	style_outlines);
This commit is contained in:
Markus Koch 2020-04-25 13:08:14 +02:00
parent 3cb3078820
commit 771704bf15
2 changed files with 99 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
htdocs/leafletjs/Leaflet.streetlabels.js
View File

@ -80,10 +80,8 @@ L.StreetLabels = L.LabelTextCollision
ctx.lineWidth = this.options.fontStyle.lineWidth;
var fontSize = this.options.fontStyle.fontSize;
if (this._map && this.options.fontStyle.dynamicFontSize === true) {
fontSize = this._getDynamicFontSize();
fontSize = this._getDynamicFontSize(layer.feature);
}
ctx.font = fontSize + this.options.fontStyle.fontSizeUnit + " 'Helvetica Neue',Helvetica,Arial,sans-serif";
@ -98,7 +96,6 @@ L.StreetLabels = L.LabelTextCollision
textWidth, textHeight));
if (this.options.collisionFlg) {
for (var index in this._textList) {
var pointBounds = this._textList[index];
if (pointBounds.intersects(bounds)) {
@ -184,7 +181,7 @@ L.StreetLabels = L.LabelTextCollision
return polyline;
},
_getDynamicFontSize: function () {
_getDynamicFontSize: function (layer) {
return parseInt(this._map.getZoom());
},

103
htdocs/mapscript.js
View File

@ -1,13 +1,27 @@
var editor_mode = 0;
var mymap;
var polyconf_show_street_names = 5; // Zoom level for when to start showing street names
var polyconf_show_cities = 5; /* City outlines will be filled on this level and further away */
var polyconf_show_districts = 4; /* Shown from polyconf_show_cities until this*/
var streetLabelsRenderer = new L.StreetLabels({
collisionFlg: true,
propertyName: 'name',
showLabelIf: function (layer) {
if (!(layer.geometry.type == "LineString"|| layer.geometry.type == "Polygon"))
switch (layer.geometry.type) {
case "LineString":
if (mymap.getZoom() <= polyconf_show_street_names)
return false;
if (mymap.getZoom() <= 5)
break;
case "Polygon":
if (mymap.getZoom() > polyconf_show_street_names)
return false;
break;
default:
return false;
}
return true;
},
fontStyle: {
@ -20,13 +34,33 @@ var streetLabelsRenderer = new L.StreetLabels({
},
});
streetLabelsRenderer._getDynamicFontSize = function () {
streetLabelsRenderer._getDynamicFontSize = function (layer) {
zoom = mymap.getZoom();
switch (layer.geometry.type) {
case "LineString":
if (zoom <= 8)
return 11;
else
return 2**(zoom - 9) * 11;
break;
case "Polygon":
if (zoom >= 4)
return 30;
return 20;
default:
break;
}
return 10;
}
var style_outlines = {
radius: 8,
fillColor: "#ff7800",
color: "black",
opacity: 1,
fillOpacity: 0.5
};
// Projection fix from: https://gis.stackexchange.com/questions/200865/leaflet-crs-simple-custom-scale
@ -62,7 +96,7 @@ mymap = L.map('mapid', {
renderer: streetLabelsRenderer,
editable: true,
crs: L.CRS.pr
}).setView([0, 0], 6);
}).setView([0, 0], 5);
var mapheight = 16384;
var mapwidth = mapheight;
@ -115,15 +149,34 @@ function load_tiles(name, id) {
return satellite;
}
var current_location = "";
var current_feature = null;
function load_geojson(name, url, iconname, iconcolor, active=1, style={}) {
var xhttp_ps = new XMLHttpRequest();
xhttp_ps.onreadystatechange = function() {
if (this.readyState == 4) {
if (this.status == 200) {
switch (iconname) {
case "street":
onEachFeature = null;
pointToLayer = null;
filter = null;
switch (iconname) {
case "street":
onEachFeature = function(feature, layer) {
layer.on("click", function (e) {
current_feature = feature;
});
};
break;
case "outline":
onEachFeature = function(feature, layer) {
layer.myTag = iconname;
layer.myName = name;
layer.on("click", function (e) {
current_location = feature.properties.name;
});
}
break;
default: /* else it is a marker with the specified icon */
onEachFeature = function(feature, layer) {
@ -151,12 +204,14 @@ function load_geojson(name, url, iconname, iconcolor, active=1, style={}) {
break;
}
var json = JSON.parse(xhttp_ps.responseText);
var geojson = L.geoJSON(json, {
geojson = L.geoJSON(json, {
style: style,
onEachFeature: onEachFeature,
pointToLayer: pointToLayer
pointToLayer: pointToLayer,
filter: filter
});
layers.addOverlay(geojson, name);
if (active)
geojson.addTo(mymap);
return geojson;
@ -351,7 +406,16 @@ var baseballIcon = L.AwesomeMarkers.icon({
});
function onMapClick(e) {
popup.setLatLng(e.latlng).setContent("You clicked the map at " + e.latlng.toString()).openOn(mymap);
var addinfo = "";
if (current_location != "")
addinfo = " (part of " + current_location + ")";
if (current_feature) {
popup.setLatLng(e.latlng).setContent("This is " + current_feature.properties.name + addinfo).openOn(mymap);
} else {
popup.setLatLng(e.latlng).setContent("You clicked the map at " + e.latlng.toString() + addinfo).openOn(mymap);
}
current_feature = null;
current_location = "";
}
mymap.on('click', onMapClick);
@ -394,13 +458,31 @@ function update_street_width() {
}
}
function update_outline_visibility() {
zoom = mymap.getZoom();
mymap.eachLayer( function(layer) {
if ( layer.myTag && layer.myTag === "outline") {
var opacity;
if (zoom <= polyconf_show_cities)
opacity = 0.5;
//else if (zoom == polyconf_show_cities + 1)
// opacity = 0.2;
else
opacity = 0.0;
layer.setStyle({fillOpacity: opacity});
}
});
}
mymap.on('zoomend', function () {is_user_drag = 1; update_hash_from_position();});
mymap.on('zoomend', update_aa_status);
mymap.on('zoomend', update_street_width);
mymap.on('zoomend', update_outline_visibility);
mymap.on('moveend', update_hash_from_position);
mymap.on('dragstart', function () { is_user_drag = 1;});
mymap.on('keydown', function (e) { if (e.originalEvent.code.match(/Arrow.*/)) is_user_drag = 1;});
mymap.on('overlayadd', function (e) { update_street_width(); update_outline_visibility(); });
function onHashChange(e, hash=null) {
if (!hash)
hash = document.location.hash;
@ -417,4 +499,3 @@ function onHashChange(e, hash=null) {
window.addEventListener("hashchange", onHashChange, false);
onHashChange(null);
update_street_width();