-
-<script type="text/javascript">
- <!--
- var box;
-
- function startExport() {
- var vectors = new OpenLayers.Layer.Vector("Vector Layer", {
- displayInLayerSwitcher: false,
- });
- map.addLayer(vectors);
-
- box = new OpenLayers.Control.DrawFeature(vectors, OpenLayers.Handler.RegularPolygon, {
- handlerOptions: {
- keyMask: OpenLayers.Handler.MOD_CTRL,
- sides: 4,
- snapAngle: 90,
- irregular: true,
- persist: true,
- callbacks: { done: boxComplete }
- }
- });
- map.addControl(box);
-
- box.activate();
-
- map.events.register("moveend", map, mapMoved);
- updateRegion(map.getExtent());
- }
-
- function formatChanged() {
- if ($("format_osm").checked) {
- $("export_osm").style.display = "inline";
- } else {
- $("export_osm").style.display = "none";
- }
-
- if ($("format_mapnik").checked) {
- $("mapnik_scale").value = roundScale(map.getScale());
- $("export_mapnik").style.display = "inline";
- } else {
- $("export_mapnik").style.display = "none";
- }
-
- if ($("format_osmarender").checked) {
- var zoom = Math.min(map.getZoom(), maxOsmarenderZoom());
-
- $("osmarender_zoom").options.selectedIndex = zoom - 4;
- $("export_osmarender").style.display = "inline";
- } else {
- $("export_osmarender").style.display = "none";
- }
- }
-
- $("format_osm").onclick = function() { formatChanged() };
- $("format_mapnik").onclick = function() { formatChanged() };
- $("format_osmarender").onclick = function() { formatChanged() };
-
- function boundsChanged() {
- var epsg4326 = new OpenLayers.Projection("EPSG:4326");
- var bounds = new OpenLayers.Bounds($("minlon").value,
- $("minlat").value,
- $("maxlon").value,
- $("maxlat").value);
-
- bounds.transform(epsg4326, map.getProjectionObject());
-
- map.events.unregister("moveend", map, mapMoved);
- map.zoomToExtent(bounds);
-
- box.handler.clear();
- box.handler.feature = new OpenLayers.Feature.Vector(bounds.toGeometry());
- box.handler.layer.addFeatures([box.handler.feature], [box.handler.style]);
- box.handler.layer.drawFeature(box.handler.feature, box.handler.style);
- }
-
- $("maxlat").onchange = function() { boundsChanged() };
- $("minlon").onchange = function() { boundsChanged() };
- $("maxlon").onchange = function() { boundsChanged() };
- $("minlat").onchange = function() { boundsChanged() };
-
- function mapMoved() {
- updateRegion(map.getExtent());
- }
-
- function boxComplete(box) {
- map.events.unregister("moveend", map, mapMoved);
- updateRegion(box.getBounds());
- }
-
- function updateRegion(bounds) {
- var epsg4326 = new OpenLayers.Projection("EPSG:4326");
- var decimals = Math.pow(10, Math.floor(map.getZoom() / 3));
-
- bounds.transform(map.getProjectionObject(), epsg4326);
-
- $("minlon").value = Math.round(bounds.left * decimals) / decimals;
- $("minlat").value = Math.round(bounds.bottom * decimals) / decimals;
- $("maxlon").value = Math.round(bounds.right * decimals) / decimals;
- $("maxlat").value = Math.round(bounds.top * decimals) / decimals;
-
- if (bounds.getWidth() * bounds.getHeight() > 0.25) {
- $("format_osm").disabled = true;
- $("format_osm").checked = false;
-
- formatChanged();
- } else {
- $("format_osm").disabled = false;
- }
-
- var max_zoom = maxOsmarenderZoom();
- var max_scale = maxMapnikScale();
-
- $("max_scale").innerHTML = roundScale(max_scale);
-
- for (var o = 0; o < $("osmarender_zoom").options.length; o++) {
- var option = $("osmarender_zoom").options[o];
-
- if (option.value > max_zoom) {
- option.disabled = true;
- } else {
- option.disabled = false;
- }
- }
-
- if ($("osmarender_zoom").options.selectedIndex + 4 > max_zoom) {
- $("osmarender_zoom").options.selectedIndex = max_zoom - 4;
- }
- }
-
- function maxMapnikScale() {
- var bounds = new OpenLayers.Bounds($("minlon").value, $("minlat").value, $("maxlon").value, $("maxlat").value);
- var epsg4326 = new OpenLayers.Projection("EPSG:4326");
- var epsg900913 = new OpenLayers.Projection("EPSG:900913");
-
- bounds.transform(epsg4326, epsg900913);
-
- return Math.floor(Math.sqrt(bounds.getWidth() * bounds.getHeight() / 0.3136));
- }
-
- function maxOsmarenderZoom() {
- var bounds = new OpenLayers.Bounds($("minlon").value, $("minlat").value, $("maxlon").value, $("maxlat").value);
- var xzoom = Math.LOG2E * Math.log(2000 * 1.40625 / bounds.getWidth());
- var ymin = bounds.bottom * Math.PI / 180;
- var ymax = bounds.top * Math.PI / 180;
- var yzoom = Math.LOG2E * (Math.log(2000 * 2 * Math.PI) - Math.log(Math.log((Math.tan(ymax) + 1 / Math.cos(ymax)) / (Math.tan(ymin) + 1 / Math.cos(ymin)))))
-
- return Math.floor(Math.min(xzoom, yzoom));
- }
-
- function roundScale(scale) {
- var precision = 5 * Math.pow(10, Math.floor(Math.LOG10E * Math.log(scale)) - 2);
-
- return precision * Math.ceil(scale / precision);
- }
-
- function validateScale() {
- if ($("mapnik_scale").value < maxMapnikScale()) {
- $("export_commit").disabled = true;
- } else {
- $("export_commit").disabled = false;
- }
- }
-
- $("mapnik_scale").onchange = function() { validateScale() };
-
- startExport();
- // -->
-</script>
projects / rails.git / blobdiff