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index.js
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index.js
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/* global L */
;(function (window) {
var imageContainerMargin = 50; // Margin + padding
// This watches for the scrollable container
var scrollPosition = 0;
$('div#contents').scroll(function() {
scrollPosition = $(this).scrollTop();
});
function init (mapid) {
var minZoom = 2
var maxZoom = 7
var img = [
64000,
20275
]
// create the map
var map = L.map(mapid, {
//added from storymap
//center: [0, 0],
//zoom: 5,
//scrollWheelZoom: false,
//
minZoom: minZoom,
maxZoom: maxZoom
})
// assign map and image dimensions
var rc = new L.RasterCoords(map, img)
// set the view on a marker ...
//map.setView(rc.unproject([4900, 3015]), 3)
/*
// add layer control object
L.control.layers({}, {
//'Polygon': layerPolygon(map, rc),
//'Points of Interest': layerCountries(map, rc),
'Bounds': layerBounds(map, rc, img),
//'Info': layerGeo(map, rc)
}).addTo(map)
*/
// the tile layer containing the image generated with gdal2tiles --leaflet ...
L.tileLayer('./tiles/{z}/{x}/{y}.png', {
noWrap: true,
attribution: '<a href="<https://www.loc.gov/resource/g3200.mf000070/>"Library of Congress</a>'
}).addTo(map)
$.getJSON('map.geojson', function(data) {
var geojson = L.geoJson(data, {
// correctly map the geojson coordinates on the image
coordsToLatLng: function (coords) {
return rc.unproject(coords)
},
onEachFeature: function (feature, layer) {
(function(layer, properties) {
// This creates numerical icons to match the ID numbers
// OR remove the next 6 lines for default blue Leaflet markers
var numericMarker = L.ExtraMarkers.icon({
icon: 'fa-number',
number: feature.properties['id'],
markerColor: 'blue'
});
layer.setIcon(numericMarker);
// This creates the contents of each chapter from the GeoJSON data. Unwanted items can be removed, and new ones can be added
var chapter = $('<p></p>', {
text: feature.properties['chapter'],
class: 'chapter-header'
});
var image = $('<img>', {
src: feature.properties['image'],
});
var source = $('<a>', {
text: feature.properties['source-credit'],
href: feature.properties['source-link'],
target: "_blank",
class: 'source'
});
var description = $('<p></p>', {
text: feature.properties['description'],
class: 'description'
});
var container = $('<div></div>', {
id: 'container' + feature.properties['id'],
class: 'image-container'
});
var imgHolder = $('<div></div', {
class: 'img-holder'
});
imgHolder.append(image);
container.append(chapter).append(imgHolder).append(source).append(description);
$('#contents').append(container);
var i;
var areaTop = -100;
var areaBottom = 0;
// Calculating total height of blocks above active
for (i = 1; i < feature.properties['id']; i++) {
areaTop += $('div#container' + i).height() + imageContainerMargin;
}
areaBottom = areaTop + $('div#container' + feature.properties['id']).height();
$('div#contents').scroll(function() {
if ($(this).scrollTop() >= areaTop && $(this).scrollTop() < areaBottom) {
$('.image-container').removeClass("inFocus").addClass("outFocus");
$('div#container' + feature.properties['id']).addClass("inFocus").removeClass("outFocus");
map.flyTo(
rc.unproject(feature.geometry.coordinates),
feature.properties['zoom']
);
//map.flyTo([feature.geometry.coordinates[1], feature.geometry.coordinates[0] ], feature.properties['zoom']);
}
});
// Make markers clickable
layer.on('click', function() {
$("div#contents").animate({scrollTop: areaTop + "px"});
});
})(layer, feature.properties);
}
});
$('div#container1').addClass("inFocus");
$('#contents').append("<div class='space-at-the-bottom'><a href='#space-at-the-top'><i class='fa fa-chevron-up'></i></br><small>Top</small></a></div>");
map.fitBounds(geojson.getBounds());
geojson.addTo(map);
});
}
init('map')
}(window))