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Convert degrees min-width to pixels min-width

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This commit is contained in:
J Guthrie 2018-10-07 00:33:54 +01:00
parent eacbcefb2e
commit e976f316b7
1 changed files with 17 additions and 13 deletions
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30
app/assets/javascripts/index/history.js
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@ -97,24 +97,28 @@ OSM.History = function(map) {
$("[data-changeset]").each(function () {
var changeset = $(this).data('changeset');
if (changeset.bbox) {
var latWidth = changeset.bbox.maxlat - changeset.bbox.minlat,
lonWidth = changeset.bbox.maxlon - changeset.bbox.minlon,
minLatWidth = 0.0004,
minLonWidth = 0.0008;
var minProjection = map.project(L.latLng(changeset.bbox.minlat, changeset.bbox.minlon)),
maxProjection = map.project(L.latLng(changeset.bbox.maxlat, changeset.bbox.maxlon)),
xGap = maxProjection["x"] - minProjection["x"],
yGap = minProjection["y"] - maxProjection["y"],
minXGap = 40, // Min width/height of changeset in pixels
minYGap = 40;
var bounds = [[changeset.bbox.minlat, changeset.bbox.minlon],
[changeset.bbox.maxlat, changeset.bbox.maxlon]];
if (latWidth < minLatWidth) {
bounds[0][0] -= ((minLatWidth - latWidth) / 2);
bounds[1][0] += ((minLatWidth - latWidth) / 2);
if (xGap < minXGap) {
minProjection["x"] -= ((minXGap - xGap) / 2);
maxProjection["x"] += ((minXGap - xGap) / 2);
}
if (lonWidth < minLonWidth) {
bounds[0][1] -= ((minLonWidth - lonWidth) / 2);
bounds[1][1] += ((minLonWidth - lonWidth) / 2);
if (yGap < minYGap) {
minProjection["y"] += ((minYGap - yGap) / 2);
maxProjection["y"] -= ((minYGap - yGap) / 2);
}
var minUnProjection = map.unproject(minProjection),
maxUnProjection = map.unproject(maxProjection),
bounds = [minUnProjection,
maxUnProjection];
changeset.bounds = L.latLngBounds(bounds);
changesets.push(changeset);
}