Fix layer map bounciness (#361)

[rails.git] / app / assets / javascripts / index / export.js

diff --git a/app/assets/javascripts/index/export.js b/app/assets/javascripts/index/export.js
index ae1871b5021203ab5584e0e447ee6d20fd31b1d2..417dfabd35be892cdf5e9ad391083d30c35de215 100644 (file)
--- a/app/assets/javascripts/index/export.js
+++ b/app/assets/javascripts/index/export.js
@@ -1,318 +1,284 @@
-function startExport(sidebarHtml) {
-  var vectors,
-      box,
-      transform,
-      markerLayer,
-      markerControl,
-      epsg4326 = new OpenLayers.Projection("EPSG:4326"),
-      epsg900913 = new OpenLayers.Projection("EPSG:900913");
-
-  vectors = new OpenLayers.Layer.Vector("Vector Layer", {
-    displayInLayerSwitcher: false
+function initializeExport(map) {
+  $("#exportanchor").click(function (e) {
+    $.ajax({ url: $(this).data('url'), success: function (sidebarHtml) {
+      startExport(sidebarHtml);
+    }});
+    e.preventDefault();

   });
   });

-  map.addLayer(vectors);
-
-  box = new OpenLayers.Control.DrawFeature(vectors, OpenLayers.Handler.RegularPolygon, {
-    handlerOptions: {
-      sides: 4,
-      snapAngle: 90,
-      irregular: true,
-      persist: true
-    }
-  });
-  box.handler.callbacks.done = endDrag;
-  map.addControl(box);

 
 

-  transform = new OpenLayers.Control.TransformFeature(vectors, {
-    rotate: false,
-    irregular: true
-  });
-  transform.events.register("transformcomplete", transform, transformComplete);
-  map.addControl(transform);
+  if (window.location.pathname == "/export") {
+    $("#exportanchor").click();
+  }

 
 

-  map.events.register("moveend", map, mapMoved);
-  map.events.register("changebaselayer", map, htmlUrlChanged);
+  function startExport(sidebarHtml) {
+    var marker;

 
 

-  $("#sidebar_title").html(I18n.t('export.start_rjs.export'));
-  $("#sidebar_content").html(sidebarHtml);
+    var locationFilter = new L.LocationFilter({
+      enableButton: false,
+      adjustButton: false
+    }).addTo(map);

 
 

-  $("#maxlat,#minlon,#maxlon,#minlat").change(boundsChanged);
+    locationFilter.on("change", filterChanged);

 
 

-  $("#drag_box").click(startDrag);
+    map.on("moveend", mapMoved);
+    map.on("baselayerchange", htmlUrlChanged);

 
 

-  $("#add_marker").click(startMarker);
+    $("#sidebar_title").html(I18n.t('export.start_rjs.export'));
+    $("#sidebar_content").html(sidebarHtml);

 
 

-  $("#format_osm,#format_mapnik,#format_html").click(formatChanged);
+    $("#maxlat,#minlon,#maxlon,#minlat").change(boundsChanged);

 
 

-  $("#mapnik_scale").change(mapnikSizeChanged);
+    $("#drag_box").click(enableFilter);

 
 

-  openSidebar();
+    $("#add_marker").click(startMarker);

 
 

-  if (map.baseLayer.name == "Mapnik") {
-    $("#format_mapnik").prop("checked", true);
-  }
+    $("#format_osm,#format_mapnik,#format_html").click(formatChanged);

 
 

-  formatChanged();
-  setBounds(map.getExtent());
+    $("#mapnik_scale").change(mapnikSizeChanged);

 
 

-  $("body").removeClass("site-index").addClass("site-export");
+    openSidebar();

 
 

-  $("#sidebar").one("closed", function () {
-    $("body").removeClass("site-export").addClass("site-index");
+    if (map.getMapBaseLayerId() == "mapnik") {
+      $("#format_mapnik").prop("checked", true);
+    }

 
 

-    clearBox();
-    clearMarker();
-    map.events.unregister("moveend", map, mapMoved);
-    map.events.unregister("changebaselayer", map, htmlUrlChanged);
-    map.removeLayer(vectors);
-  });
+    setBounds(map.getBounds());
+    formatChanged();

 
 

-  function getMercatorBounds() {
-    var bounds = new OpenLayers.Bounds($("#minlon").val(), $("#minlat").val(),
-                                       $("#maxlon").val(), $("#maxlat").val());
+    $("body").removeClass("site-index").addClass("site-export");

 
 

-    return bounds.transform(epsg4326, epsg900913);
-  }
+    $("#sidebar").one("closed", function () {
+      $("body").removeClass("site-export").addClass("site-index");

 
 

-  function boundsChanged() {
-    var bounds = getMercatorBounds();
+      map.removeLayer(locationFilter);
+      clearMarker();

 
 

-    map.events.unregister("moveend", map, mapMoved);
-    map.zoomToExtent(bounds);
+      map.off("moveend", mapMoved);
+      map.off("baselayerchange", htmlUrlChanged);
+      locationFilter.off("change", filterChanged);
+    });

 
 

-    clearBox();
-    drawBox(bounds);
+    function getBounds() {
+      return L.latLngBounds(L.latLng($("#minlat").val(), $("#minlon").val()),
+                            L.latLng($("#maxlat").val(), $("#maxlon").val()));
+    }

 
 

-    validateControls();
-    mapnikSizeChanged();
-  }
+    function getScale() {
+      var bounds = map.getBounds(),
+        centerLat = bounds.getCenter().lat,
+        halfWorldMeters = 6378137 * Math.PI * Math.cos(centerLat * Math.PI / 180),
+        meters = halfWorldMeters * (bounds.getEast() - bounds.getWest()) / 180,
+        pixelsPerMeter = map.getSize().x / meters,
+        metersPerPixel = 1 / (92 * 39.3701);
+      return Math.round(1 / (pixelsPerMeter * metersPerPixel));
+    }

 
 

-  function startDrag() {
-    $("#drag_box").html(I18n.t('export.start_rjs.drag_a_box'));
+    function getMercatorBounds() {
+      var bounds = getBounds();
+      return L.bounds(L.CRS.EPSG3857.project(bounds.getSouthWest()),
+                      L.CRS.EPSG3857.project(bounds.getNorthEast()));
+    }

 
 

-    clearBox();
-    box.activate();
-  };
+    function boundsChanged() {
+      var bounds = getBounds();

 
 

-  function endDrag(bbox) {
-    var bounds = bbox.getBounds();
+      map.fitBounds(bounds);
+      locationFilter.setBounds(bounds);

 
 

-    map.events.unregister("moveend", map, mapMoved);
-    setBounds(bounds);
-    drawBox(bounds);
-    box.deactivate();
-    validateControls();
+      enableFilter();
+      validateControls();
+      mapnikSizeChanged();
+    }

 
 

-    $("#drag_box").html(I18n.t('export.start_rjs.manually_select'));
-  }
+    function enableFilter() {
+      if (!locationFilter.getBounds().isValid()) {
+        locationFilter.setBounds(map.getBounds().pad(-0.2));
+      }

 
 

-  function transformComplete(event) {
-    setBounds(event.feature.geometry.bounds);
-    validateControls();
-  }
+      $("#drag_box").hide();
+      locationFilter.enable();
+    }

 
 

-  function startMarker() {
-    $("#add_marker").html(I18n.t('export.start_rjs.click_add_marker'));
-
-    if (!markerLayer) {
-      markerLayer = new OpenLayers.Layer.Vector("",{
-        displayInLayerSwitcher: false,
-        style: {
-          externalGraphic: OpenLayers.Util.getImageLocation("marker.png"),
-          graphicXOffset: -10.5,
-          graphicYOffset: -25,
-          graphicWidth: 21,
-          graphicHeight: 25
-        }
-      });
-      map.addLayer(markerLayer);
-
-      markerControl = new OpenLayers.Control.DrawFeature(markerLayer, OpenLayers.Handler.Point);
-      map.addControl(markerControl);
-
-      markerLayer.events.on({ "featureadded": endMarker });
+    function filterChanged() {
+      setBounds(locationFilter.getBounds());
+      validateControls();

     }
 
     }
 

-    markerLayer.destroyFeatures();
-    markerControl.activate();
+    function startMarker() {
+      $("#add_marker").html(I18n.t('export.start_rjs.click_add_marker'));

 
 

-    return false;
-  }
+      map.on("click", endMarker);

 
 

-  function endMarker(event) {
-    markerControl.deactivate();
+      return false;
+    }

 
 

-    $("#add_marker").html(I18n.t('export.start_rjs.change_marker'));
-    $("#marker_inputs").show();
+    function endMarker(event) {
+      map.off("click", endMarker);

 
 

-    var geom = event.feature.geometry.clone().transform(epsg900913, epsg4326);
+      $("#add_marker").html(I18n.t('export.start_rjs.change_marker'));
+      $("#marker_inputs").show();

 
 

-    $("#marker_lon").val(geom.x.toFixed(5));
-    $("#marker_lat").val(geom.y.toFixed(5));
+      var latlng = event.latlng;

 
 

-    htmlUrlChanged();
-  }
+      if (marker) {
+        map.removeLayer(marker);
+      }

 
 

-  function clearMarker() {
-    $("#marker_lon,#marker_lat").val("");
-    $("#marker_inputs").hide();
-    $("#add_marker").html(I18n.t('export.start_rjs.add_marker'));
+      marker = L.marker(latlng).addTo(map);

 
 

-    if (markerLayer) {
-      markerControl.destroy();
-      markerLayer.destroy();
-      markerLayer = null;
-      markerControl = null;
-    }
-  }
+      $("#marker_lon").val(latlng.lng.toFixed(5));
+      $("#marker_lat").val(latlng.lat.toFixed(5));

 
 

-  function mapMoved() {
-    setBounds(map.getExtent());
-    validateControls();
-  }
+      htmlUrlChanged();
+    }

 
 

-  function setBounds(bounds) {
-    var toPrecision = zoomPrecision(map.getZoom());
+    function clearMarker() {
+      $("#marker_lon,#marker_lat").val("");
+      $("#marker_inputs").hide();
+      $("#add_marker").html(I18n.t('export.start_rjs.add_marker'));

 
 

-    bounds = bounds.clone().transform(map.getProjectionObject(), epsg4326);
+      if (marker) {
+        map.removeLayer(marker);
+      }
+    }

 
 

-    $("#minlon").val(toPrecision(bounds.left));
-    $("#minlat").val(toPrecision(bounds.bottom));
-    $("#maxlon").val(toPrecision(bounds.right));
-    $("#maxlat").val(toPrecision(bounds.top));
+    function mapMoved() {
+      if (!locationFilter.isEnabled()) {
+        setBounds(map.getBounds());
+        validateControls();
+      }
+    }

 
 

-    mapnikSizeChanged();
-    htmlUrlChanged();
-  }
+    function setBounds(bounds) {
+      var toPrecision = zoomPrecision(map.getZoom());

 
 

-  function clearBox() {
-    transform.deactivate();
-    vectors.destroyFeatures();
-  }
+      $("#minlon").val(toPrecision(bounds.getWest()));
+      $("#minlat").val(toPrecision(bounds.getSouth()));
+      $("#maxlon").val(toPrecision(bounds.getEast()));
+      $("#maxlat").val(toPrecision(bounds.getNorth()));

 
 

-  function drawBox(bounds) {
-    var feature = new OpenLayers.Feature.Vector(bounds.toGeometry());
+      mapnikSizeChanged();
+      htmlUrlChanged();
+    }

 
 

-    vectors.addFeatures(feature);
-    transform.setFeature(feature);
-  }
+    function validateControls() {
+      var bounds = getBounds();

 
 

-  function validateControls() {
-    var bounds = new OpenLayers.Bounds($("#minlon").val(), $("#minlat").val(), $("#maxlon").val(), $("#maxlat").val());
+      var tooLarge = bounds.getSize() > OSM.MAX_REQUEST_AREA;
+      if (tooLarge) {
+        $("#export_osm_too_large").show();
+      } else {
+        $("#export_osm_too_large").hide();
+      }

 
 

-    if (bounds.getWidth() * bounds.getHeight() > OSM.MAX_REQUEST_AREA) {
-      $("#export_osm_too_large").show();
-    } else {
-      $("#export_osm_too_large").hide();
-    }
+      var max_scale = maxMapnikScale();
+      var disabled = true;

 
 

-    var max_scale = maxMapnikScale();
-    var disabled = true;
+      if ($("#format_osm").prop("checked")) {
+        disabled = tooLarge;
+      } else if ($("#format_mapnik").prop("checked")) {
+        disabled = $("#mapnik_scale").val() < max_scale;
+      }

 
 

-    if ($("#format_osm").prop("checked")) {
-      disabled = bounds.getWidth() * bounds.getHeight() > OSM.MAX_REQUEST_AREA;
-    } else if ($("#format_mapnik").prop("checked")) {
-      disabled = $("#mapnik_scale").val() < max_scale;
+      $("#export_commit").prop("disabled", disabled);
+      $("#mapnik_max_scale").html(roundScale(max_scale));

     }
 
     }
 

-    $("#export_commit").prop("disabled", disabled);
-    $("#mapnik_max_scale").html(roundScale(max_scale));
-  }
+    function htmlUrlChanged() {
+      var bounds = getBounds();
+      var layerName = map.getMapBaseLayerId();

 
 

-  function htmlUrlChanged() {
-    var bounds = new OpenLayers.Bounds($("#minlon").val(), $("#minlat").val(), $("#maxlon").val(), $("#maxlat").val());
-    var layerName = map.baseLayer.keyid;
-    var url = "http://" + OSM.SERVER_URL + "/export/embed.html?bbox=" + bounds.toBBOX() + "&amp;layer=" + layerName;
-    var markerUrl = "";
+      var url = "http://" + OSM.SERVER_URL + "/export/embed.html?bbox=" + bounds.toBBoxString() + "&amp;layer=" + layerName;
+      var markerUrl = "";

 
 

-    if ($("#marker_lat").val() && $("#marker_lon").val()) {
-      markerUrl = "&amp;mlat=" + $("#marker_lat").val() + "&amp;mlon=" + $("#marker_lon").val();
-      url += "&amp;marker=" + $("#marker_lat").val() + "," + $("#marker_lon").val();
-    }
+      if ($("#marker_lat").val() && $("#marker_lon").val()) {
+        markerUrl = "&amp;mlat=" + $("#marker_lat").val() + "&amp;mlon=" + $("#marker_lon").val();
+        url += "&amp;marker=" + $("#marker_lat").val() + "," + $("#marker_lon").val();
+      }

 
 

-    var html = '<iframe width="425" height="350" frameborder="0" scrolling="no" marginheight="0" marginwidth="0" src="'+url+'" style="border: 1px solid black"></iframe>';
+      var html = '<iframe width="425" height="350" frameborder="0" scrolling="no" marginheight="0" marginwidth="0" src="'+url+'" style="border: 1px solid black"></iframe>';

 
 

-    // Create "larger map" link
-    var center = bounds.getCenterLonLat();
+      // Create "larger map" link
+      var center = bounds.getCenter();

 
 

-    bounds.transform(epsg4326, epsg900913);
-    var zoom = map.getZoomForExtent(bounds);
+      var zoom = map.getBoundsZoom(bounds);

 
 

-    var layers = getMapLayers();
+      var layers = map.getLayersCode();

 
 

-    var text = I18n.t('export.start_rjs.view_larger_map');
-    var escaped = [];
+      var text = I18n.t('export.start_rjs.view_larger_map');
+      var escaped = [];

 
 

-    for (var i = 0; i < text.length; ++i) {
-      var c = text.charCodeAt(i);
-      escaped.push(c < 127 ? text.charAt(i) : "&#" + c + ";");
-    }
+      for (var i = 0; i < text.length; ++i) {
+        var c = text.charCodeAt(i);
+        escaped.push(c < 127 ? text.charAt(i) : "&#" + c + ";");
+      }

 
 

-    html += '<br /><small><a href="http://' + OSM.SERVER_URL + '/?lat='+center.lat+'&amp;lon='+center.lon+'&amp;zoom='+zoom+'&amp;layers='+layers+markerUrl+'">'+escaped.join("")+'</a></small>';
+      html += '<br /><small><a href="http://' + OSM.SERVER_URL + '/?lat='+center.lat+'&amp;lon='+center.lng+'&amp;zoom='+zoom+'&amp;layers='+layers+markerUrl+'">'+escaped.join("")+'</a></small>';

 
 

-    $("#export_html_text").val(html);
+      $("#export_html_text").val(html);

 
 

-    if ($("#format_html").prop("checked")) {
-      $("#export_html_text").prop("selected", true);
+      if ($("#format_html").prop("checked")) {
+        $("#export_html_text").prop("selected", true);
+      }

     }
     }

-  }

 
 

-  function formatChanged() {
-    $("#export_commit").show();
+    function formatChanged() {
+      $("#export_commit").show();

 
 

-    if ($("#format_osm").prop("checked")) {
-      $("#export_osm").show();
-    } else {
-      $("#export_osm").hide();
-    }
+      if ($("#format_osm").prop("checked")) {
+        $("#export_osm").show();
+      } else {
+        $("#export_osm").hide();
+      }

 
 

-    if ($("#format_mapnik").prop("checked")) {
-      $("#mapnik_scale").val(roundScale(map.getScale()));
-      $("#export_mapnik").show();
+      if ($("#format_mapnik").prop("checked")) {
+        $("#mapnik_scale").val(getScale());
+        $("#export_mapnik").show();

 
 

-      mapnikSizeChanged();
-    } else {
-      $("#export_mapnik").hide();
-    }
+        mapnikSizeChanged();
+      } else {
+        $("#export_mapnik").hide();
+      }

 
 

-    if ($("#format_html").prop("checked")) {
-      $("#export_html").show();
-      $("#export_commit").hide();
-      $("#export_html_text").prop("selected", true);
-    } else {
-      $("#export_html").hide();
+      if ($("#format_html").prop("checked")) {
+        $("#export_html").show();
+        $("#export_commit").hide();
+        $("#export_html_text").prop("selected", true);
+      } else {
+        $("#export_html").hide();

 
 

-      clearMarker();
-    }
+        clearMarker();
+      }

 
 

-    validateControls();
-  }
+      validateControls();
+    }

 
 

-  function maxMapnikScale() {
-    var bounds = getMercatorBounds();
+    function maxMapnikScale() {
+      var size = getMercatorBounds().getSize();

 
 

-    return Math.floor(Math.sqrt(bounds.getWidth() * bounds.getHeight() / 0.3136));
-  }
+      return Math.floor(Math.sqrt(size.x * size.y / 0.3136));
+    }

 
 

-  function mapnikImageSize(scale) {
-    var bounds = getMercatorBounds();
+    function mapnikImageSize(scale) {
+      var size = getMercatorBounds().getSize();

 
 

-    return new OpenLayers.Size(Math.round(bounds.getWidth() / scale / 0.00028),
-                               Math.round(bounds.getHeight() / scale / 0.00028));
-  }
+      return {w: Math.round(size.x / scale / 0.00028),
+              h: Math.round(size.y / scale / 0.00028)};
+    }

 
 

-  function roundScale(scale) {
-    var precision = 5 * Math.pow(10, Math.floor(Math.LOG10E * Math.log(scale)) - 2);
+    function roundScale(scale) {
+      var precision = 5 * Math.pow(10, Math.floor(Math.LOG10E * Math.log(scale)) - 2);

 
 

-    return precision * Math.ceil(scale / precision);
-  }
+      return precision * Math.ceil(scale / precision);
+    }

 
 

-  function mapnikSizeChanged() {
-    var size = mapnikImageSize($("#mapnik_scale").val());
+    function mapnikSizeChanged() {
+      var size = mapnikImageSize($("#mapnik_scale").val());

 
 

-    $("#mapnik_image_width").html(size.w);
-    $("#mapnik_image_height").html(size.h);
+      $("#mapnik_image_width").html(size.w);
+      $("#mapnik_image_height").html(size.h);

 
 

-    validateControls();
+      validateControls();
+    }

   }
 }
   }
 }