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add very basic support for area labels

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Ansis Brammanis
2013-01-20 22:46:30 -05:00
parent 572c111bf1
commit 71f6402df0
1 changed files with 29 additions and 8 deletions
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37
js/id/svg/labels.js
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@@ -1,4 +1,4 @@
iD.svg.Labels = function() {
iD.svg.Labels = function(projection) {
var pointOffsets = [
[25, 3, 'start'], // right
@@ -124,14 +124,13 @@ iD.svg.Labels = function() {
}
return function drawLabels(surface, graph, entities, filter, projection) {
return function drawLabels(surface, graph, entities, filter) {
var project = iD.svg.RoundProjection(projection);
var rtree = new RTree();
function addPoint(d, i) {
var bbox = this.getBBox();
var coords = project(d.loc);
var coords = projection(d.loc);
var tree = new RTree.Rectangle(coords[0], coords[1], bbox.width, bbox.height);
rtree.insert(tree, d.id);
}
@@ -139,7 +138,8 @@ iD.svg.Labels = function() {
//d3.selectAll('.node.point').each(addPoint);
var points = [],
roads = [];
roads = [],
buildings = [];
for (var i = 0; i < entities.length; i++) {
var entity = entities[i];
@@ -147,10 +147,12 @@ iD.svg.Labels = function() {
roads.push(entity);
} else if (entity.geometry() === 'point' && entity.tags.name) {
points.push(entity);
} else if (entity.geometry() === 'area' && entity.tags.building && entity.tags.name) {
buildings.push(entity);
}
}
var entities = roads.concat(points);
var entities = roads.concat(buildings).concat(points);
var rect;
var pathTransform = getPathTransform(projection);
var textlabels = [],
@@ -171,12 +173,12 @@ iD.svg.Labels = function() {
h = 20;
if (entity.type === 'node') {
var coord = project(entity.loc),
var coord = projection(entity.loc),
offset = pointOffsets[0];
p.x = coord[0] + offset[0];
p.y = coord[1] + offset[1];
p.textAnchor = offset[2];
rect = new RTree.Rectangle(p.x, p.y, width * entity.tags.name.length, 20);
rect = new RTree.Rectangle(p.x, p.y, w, 20);
if (nocollisions(rect)) {
textpositions.push(p);
textlabels.push(entity);
@@ -190,6 +192,25 @@ iD.svg.Labels = function() {
pathpositions.push(p);
pathlabels.push(entity);
}
} else if (entity.type === 'way' && entity.geometry() === 'area') {
var nodes = _.pluck(entity.nodes, 'loc')
.map(iD.svg.RoundProjection(projection)),
centroid = iD.util.geo.polygonCentroid(nodes),
extent = entity.extent(graph),
entitywidth = projection(extent[1])[0] - projection(extent[0])[0];
if (entitywidth < w + 20) {
continue;
}
p.x = centroid[0];
p.y = centroid[1];
p.textAnchor = 'middle';
rect = new RTree.Rectangle(p.x - w/2, p.y, w, 20);
if (nocollisions(rect)) {
textpositions.push(p);
textlabels.push(entity);
}
}
}