/django/contrib/gis/templates/gis/admin/openlayers.js
https://code.google.com/p/mango-py/ · JavaScript · 168 lines · 143 code · 0 blank · 25 comment · 37 complexity · 8d2bb35ec5985656f5deff82a1f3b958 MD5 · raw file
- {# Author: Justin Bronn, Travis Pinney & Dane Springmeyer #}
- OpenLayers.Projection.addTransform("EPSG:4326", "EPSG:3857", OpenLayers.Layer.SphericalMercator.projectForward);
- {% block vars %}var {{ module }} = {};
- {{ module }}.map = null; {{ module }}.controls = null; {{ module }}.panel = null; {{ module }}.re = new RegExp("^SRID=\d+;(.+)", "i"); {{ module }}.layers = {};
- {{ module }}.modifiable = {{ modifiable|yesno:"true,false" }};
- {{ module }}.wkt_f = new OpenLayers.Format.WKT();
- {{ module }}.is_collection = {{ is_collection|yesno:"true,false" }};
- {{ module }}.collection_type = '{{ collection_type }}';
- {{ module }}.is_linestring = {{ is_linestring|yesno:"true,false" }};
- {{ module }}.is_polygon = {{ is_polygon|yesno:"true,false" }};
- {{ module }}.is_point = {{ is_point|yesno:"true,false" }};
- {% endblock %}
- {{ module }}.get_ewkt = function(feat){return 'SRID={{ srid }};' + {{ module }}.wkt_f.write(feat);}
- {{ module }}.read_wkt = function(wkt){
- // OpenLayers cannot handle EWKT -- we make sure to strip it out.
- // EWKT is only exposed to OL if there's a validation error in the admin.
- var match = {{ module }}.re.exec(wkt);
- if (match){wkt = match[1];}
- return {{ module }}.wkt_f.read(wkt);
- }
- {{ module }}.write_wkt = function(feat){
- if ({{ module }}.is_collection){ {{ module }}.num_geom = feat.geometry.components.length;}
- else { {{ module }}.num_geom = 1;}
- document.getElementById('{{ id }}').value = {{ module }}.get_ewkt(feat);
- }
- {{ module }}.add_wkt = function(event){
- // This function will sync the contents of the `vector` layer with the
- // WKT in the text field.
- if ({{ module }}.is_collection){
- var feat = new OpenLayers.Feature.Vector(new OpenLayers.Geometry.{{ geom_type }}());
- for (var i = 0; i < {{ module }}.layers.vector.features.length; i++){
- feat.geometry.addComponents([{{ module }}.layers.vector.features[i].geometry]);
- }
- {{ module }}.write_wkt(feat);
- } else {
- // Make sure to remove any previously added features.
- if ({{ module }}.layers.vector.features.length > 1){
- old_feats = [{{ module }}.layers.vector.features[0]];
- {{ module }}.layers.vector.removeFeatures(old_feats);
- {{ module }}.layers.vector.destroyFeatures(old_feats);
- }
- {{ module }}.write_wkt(event.feature);
- }
- }
- {{ module }}.modify_wkt = function(event){
- if ({{ module }}.is_collection){
- if ({{ module }}.is_point){
- {{ module }}.add_wkt(event);
- return;
- } else {
- // When modifying the selected components are added to the
- // vector layer so we only increment to the `num_geom` value.
- var feat = new OpenLayers.Feature.Vector(new OpenLayers.Geometry.{{ geom_type }}());
- for (var i = 0; i < {{ module }}.num_geom; i++){
- feat.geometry.addComponents([{{ module }}.layers.vector.features[i].geometry]);
- }
- {{ module }}.write_wkt(feat);
- }
- } else {
- {{ module }}.write_wkt(event.feature);
- }
- }
- // Function to clear vector features and purge wkt from div
- {{ module }}.deleteFeatures = function(){
- {{ module }}.layers.vector.removeFeatures({{ module }}.layers.vector.features);
- {{ module }}.layers.vector.destroyFeatures();
- }
- {{ module }}.clearFeatures = function (){
- {{ module }}.deleteFeatures();
- document.getElementById('{{ id }}').value = '';
- {{ module }}.map.setCenter(new OpenLayers.LonLat({{ default_lon }}, {{ default_lat }}), {{ default_zoom }});
- }
- // Add Select control
- {{ module }}.addSelectControl = function(){
- var select = new OpenLayers.Control.SelectFeature({{ module }}.layers.vector, {'toggle' : true, 'clickout' : true});
- {{ module }}.map.addControl(select);
- select.activate();
- }
- {{ module }}.enableDrawing = function(){ {{ module }}.map.getControlsByClass('OpenLayers.Control.DrawFeature')[0].activate();}
- {{ module }}.enableEditing = function(){ {{ module }}.map.getControlsByClass('OpenLayers.Control.ModifyFeature')[0].activate();}
- // Create an array of controls based on geometry type
- {{ module }}.getControls = function(lyr){
- {{ module }}.panel = new OpenLayers.Control.Panel({'displayClass': 'olControlEditingToolbar'});
- var nav = new OpenLayers.Control.Navigation();
- var draw_ctl;
- if ({{ module }}.is_linestring){
- draw_ctl = new OpenLayers.Control.DrawFeature(lyr, OpenLayers.Handler.Path, {'displayClass': 'olControlDrawFeaturePath'});
- } else if ({{ module }}.is_polygon){
- draw_ctl = new OpenLayers.Control.DrawFeature(lyr, OpenLayers.Handler.Polygon, {'displayClass': 'olControlDrawFeaturePolygon'});
- } else if ({{ module }}.is_point){
- draw_ctl = new OpenLayers.Control.DrawFeature(lyr, OpenLayers.Handler.Point, {'displayClass': 'olControlDrawFeaturePoint'});
- }
- if ({{ module }}.modifiable){
- var mod = new OpenLayers.Control.ModifyFeature(lyr, {'displayClass': 'olControlModifyFeature'});
- {{ module }}.controls = [nav, draw_ctl, mod];
- } else {
- if(!lyr.features.length){
- {{ module }}.controls = [nav, draw_ctl];
- } else {
- {{ module }}.controls = [nav];
- }
- }
- }
- {{ module }}.init = function(){
- {% block map_options %}// The options hash, w/ zoom, resolution, and projection settings.
- var options = {
- {% autoescape off %}{% for item in map_options.items %} '{{ item.0 }}' : {{ item.1 }}{% if not forloop.last %},{% endif %}
- {% endfor %}{% endautoescape %} };{% endblock %}
- // The admin map for this geometry field.
- {{ module }}.map = new OpenLayers.Map('{{ id }}_map', options);
- // Base Layer
- {{ module }}.layers.base = {% block base_layer %}new OpenLayers.Layer.WMS( "{{ wms_name }}", "{{ wms_url }}", {layers: '{{ wms_layer }}'} );{% endblock %}
- {{ module }}.map.addLayer({{ module }}.layers.base);
- {% block extra_layers %}{% endblock %}
- {% if is_linestring %}OpenLayers.Feature.Vector.style["default"]["strokeWidth"] = 3; // Default too thin for linestrings. {% endif %}
- {{ module }}.layers.vector = new OpenLayers.Layer.Vector(" {{ field_name }}");
- {{ module }}.map.addLayer({{ module }}.layers.vector);
- // Read WKT from the text field.
- var wkt = document.getElementById('{{ id }}').value;
- if (wkt){
- // After reading into geometry, immediately write back to
- // WKT <textarea> as EWKT (so that SRID is included).
- var admin_geom = {{ module }}.read_wkt(wkt);
- {{ module }}.write_wkt(admin_geom);
- if ({{ module }}.is_collection){
- // If geometry collection, add each component individually so they may be
- // edited individually.
- for (var i = 0; i < {{ module }}.num_geom; i++){
- {{ module }}.layers.vector.addFeatures([new OpenLayers.Feature.Vector(admin_geom.geometry.components[i].clone())]);
- }
- } else {
- {{ module }}.layers.vector.addFeatures([admin_geom]);
- }
- // Zooming to the bounds.
- {{ module }}.map.zoomToExtent(admin_geom.geometry.getBounds());
- if ({{ module }}.is_point){
- {{ module }}.map.zoomTo({{ point_zoom }});
- }
- } else {
- {{ module }}.map.setCenter(new OpenLayers.LonLat({{ default_lon }}, {{ default_lat }}), {{ default_zoom }});
- }
- // This allows editing of the geographic fields -- the modified WKT is
- // written back to the content field (as EWKT, so that the ORM will know
- // to transform back to original SRID).
- {{ module }}.layers.vector.events.on({"featuremodified" : {{ module }}.modify_wkt});
- {{ module }}.layers.vector.events.on({"featureadded" : {{ module }}.add_wkt});
- {% block controls %}
- // Map controls:
- // Add geometry specific panel of toolbar controls
- {{ module }}.getControls({{ module }}.layers.vector);
- {{ module }}.panel.addControls({{ module }}.controls);
- {{ module }}.map.addControl({{ module }}.panel);
- {{ module }}.addSelectControl();
- // Then add optional visual controls
- {% if mouse_position %}{{ module }}.map.addControl(new OpenLayers.Control.MousePosition());{% endif %}
- {% if scale_text %}{{ module }}.map.addControl(new OpenLayers.Control.Scale());{% endif %}
- {% if layerswitcher %}{{ module }}.map.addControl(new OpenLayers.Control.LayerSwitcher());{% endif %}
- // Then add optional behavior controls
- {% if not scrollable %}{{ module }}.map.getControlsByClass('OpenLayers.Control.Navigation')[0].disableZoomWheel();{% endif %}
- {% endblock %}
- if (wkt){
- if ({{ module }}.modifiable){
- {{ module }}.enableEditing();
- }
- } else {
- {{ module }}.enableDrawing();
- }
- }