app/assets/javascripts/index/export.js

   1 function initializeExport(map) {
   2   if (window.location.pathname == "/export") {
   3     startExport();
   4   }
   5
   6   function startExport() {
   7     var locationFilter = new L.LocationFilter({
   8       enableButton: false,
   9       adjustButton: false
  10     }).addTo(map);
  11
  12     locationFilter.on("change", update);
  13
  14     map.on("moveend", update);
  15
  16     $("#sidebar_title").html(I18n.t('export.start_rjs.export'));
  17
  18     $("#maxlat,#minlon,#maxlon,#minlat").change(boundsChanged);
  19
  20     $("#drag_box").click(enableFilter);
  21
  22     openSidebar();
  23
  24     setBounds(map.getBounds());
  25
  26     $("#sidebar").one("closed", function () {
  27       map.removeLayer(locationFilter);
  28       map.off("moveend", update);
  29       locationFilter.off("change", update);
  30     });
  31
  32     function getBounds() {
  33       return L.latLngBounds(L.latLng($("#minlat").val(), $("#minlon").val()),
  34                             L.latLng($("#maxlat").val(), $("#maxlon").val()));
  35     }
  36
  37     function boundsChanged() {
  38       var bounds = getBounds();
  39
  40       map.fitBounds(bounds);
  41       locationFilter.setBounds(bounds);
  42
  43       enableFilter();
  44       validateControls();
  45     }
  46
  47     function enableFilter() {
  48       if (!locationFilter.getBounds().isValid()) {
  49         locationFilter.setBounds(map.getBounds().pad(-0.2));
  50       }
  51
  52       $("#drag_box").hide();
  53       locationFilter.enable();
  54     }
  55
  56     function update() {
  57       setBounds(locationFilter.isEnabled() ? locationFilter.getBounds() : map.getBounds());
  58       validateControls();
  59     }
  60
  61     function setBounds(bounds) {
  62       var precision = zoomPrecision(map.getZoom());
  63       $("#minlon").val(bounds.getWest().toFixed(precision));
  64       $("#minlat").val(bounds.getSouth().toFixed(precision));
  65       $("#maxlon").val(bounds.getEast().toFixed(precision));
  66       $("#maxlat").val(bounds.getNorth().toFixed(precision));
  67     }
  68
  69     function validateControls() {
  70       $("#export_osm_too_large").toggle(getBounds().getSize() > OSM.MAX_REQUEST_AREA);
  71     }
  72   }
  73 }