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Disable OSM export when the area is too large.

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This commit is contained in:
Tom Hughes 2008-04-08 18:38:43 +00:00
parent d4efb3849b
commit f1c0834c5c
1 changed files with 34 additions and 14 deletions
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48
app/views/export/_start.rhtml
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@ -67,16 +67,26 @@
updateRegion(map.getExtent());
}
function setFormat(format) {
$("export_osm").style.display = "none";
$("export_mapnik").style.display = "none";
$("export_" + format).style.display = "inline";
function formatChanged() {
if ($("export_format_osm").checked) {
$("export_osm").style.display = "inline";
} else {
$("export_osm").style.display = "none";
}
if ($("export_format_png").checked ||
$("export_format_pdf").checked ||
$("export_format_svg").checked) {
$("export_mapnik").style.display = "inline";
} else {
$("export_mapnik").style.display = "none";
}
}
$("export_format_osm").onclick = function() { setFormat("osm") };
$("export_format_png").onclick = function() { setFormat("mapnik") };
$("export_format_pdf").onclick = function() { setFormat("mapnik") };
$("export_format_svg").onclick = function() { setFormat("mapnik") };
$("export_format_osm").onclick = function() { formatChanged() };
$("export_format_png").onclick = function() { formatChanged() };
$("export_format_pdf").onclick = function() { formatChanged() };
$("export_format_svg").onclick = function() { formatChanged() };
function mapMoved() {
updateRegion(map.getExtent());
@ -88,14 +98,24 @@
}
function updateRegion(bounds) {
var epsg4326 = new OpenLayers.Projection("EPSG:4326");
var decimals = Math.pow(10, Math.floor(map.getZoom() / 3));
var bl = mercatorToLonLat(new OpenLayers.LonLat(bounds.left, bounds.bottom));
var tr = mercatorToLonLat(new OpenLayers.LonLat(bounds.right, bounds.top));
$("export_maxlat").value = Math.round(tr.lat * decimals) / decimals;
$("export_minlon").value = Math.round(bl.lon * decimals) / decimals;
$("export_maxlon").value = Math.round(tr.lon * decimals) / decimals;
$("export_minlat").value = Math.round(bl.lat * decimals) / decimals;
bounds.transform(map.getProjectionObject(), epsg4326);
$("export_maxlat").value = Math.round(bounds.top * decimals) / decimals;
$("export_minlon").value = Math.round(bounds.left * decimals) / decimals;
$("export_maxlon").value = Math.round(bounds.right * decimals) / decimals;
$("export_minlat").value = Math.round(bounds.bottom * decimals) / decimals;
if (bounds.getWidth() * bounds.getHeight() > 0.25) {
$("export_format_osm").disabled = true;
$("export_format_osm").checked = false;
formatChanged();
} else {
$("export_format_osm").disabled = false;
}
}
startExport();