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<html>
<head>
<script src="../OLLoader.js"></script>
<script type="text/javascript">
var layer;
function test_Layer_FixedZoomLevels (t) {
t.plan( 39 );
var layer = { 'MIN_ZOOM_LEVEL': 5,
'MAX_ZOOM_LEVEL': 10 };
//defaults
layer = p_createLayer(layer);
p_minMaxNum(t, layer, layer.MIN_ZOOM_LEVEL, layer.MAX_ZOOM_LEVEL, "nothing specified");
//layer.options
// min,num
layer = p_createLayer(layer, {}, { minZoomLevel: 3, numZoomLevels: 12});
p_minMaxNum(t, layer, layer.MIN_ZOOM_LEVEL, layer.MAX_ZOOM_LEVEL, "min too low num too high(layer.options)");
layer = p_createLayer(layer, {}, { minZoomLevel: 6, numZoomLevels: 3 });
p_minMaxNum(t, layer, 6, 8, "valid min,num(layer.options)");
// max
layer = p_createLayer(layer, {}, { maxZoomLevel: 9 });
p_minMaxNum(t, layer, layer.MIN_ZOOM_LEVEL, 9, "valid max(layer.options)");
layer = p_createLayer(layer, {}, { maxZoomLevel: 12 });
p_minMaxNum(t, layer, layer.MIN_ZOOM_LEVEL, layer.MAX_ZOOM_LEVEL, "invalid max(layer.options)");
//map
// min,num
layer = p_createLayer(layer, { minZoomLevel: 3, numZoomLevels: 12});
p_minMaxNum(t, layer, layer.MIN_ZOOM_LEVEL, layer.MAX_ZOOM_LEVEL, "min too low num too high(map)");
layer = p_createLayer(layer, { minZoomLevel: 6, numZoomLevels: 3 });
p_minMaxNum(t, layer, 6, 8, "valid min,num(map)");
// max
layer = p_createLayer(layer, { maxZoomLevel: 9 });
p_minMaxNum(t, layer, layer.MIN_ZOOM_LEVEL, 9, "valid max(map)");
layer = p_createLayer(layer, { maxZoomLevel: 12 });
p_minMaxNum(t, layer, layer.MIN_ZOOM_LEVEL, layer.MAX_ZOOM_LEVEL, "invalid max(map)");
//map vs. options
layer = p_createLayer(layer, {minZoomLevel: 6, numZoomLevels: 2}, { minZoomLevel: 7, numZoomLevels: 3});
p_minMaxNum(t, layer, 7, 9, "min,num(layer.options) wins over (map)");
layer = p_createLayer(layer, {minZoomLevel: 6, maxZoomLevel: 8}, { minZoomLevel: 7, maxZoomLevel: 9});
p_minMaxNum(t, layer, 7, 9, "min,max(layer.options) wins over (map)");
// numZoomLevels vs. maxZoomLevel
layer = p_createLayer(layer, {maxZoomLevel: 8, numZoomLevels: 6});
p_minMaxNum(t, layer, layer.MIN_ZOOM_LEVEL, 10, "min,max(layer.options) wins over (map)");
// resolutions array
var resolutions = Array(20);
for (var i = 0; i < 20; i++) {
resolutions[i] = Math.random();
}
OpenLayers.Util.extend(layer, {RESOLUTIONS:resolutions});
var minZoomLevel = 6;
var numZoomLevels = 2;
layer = p_createLayer(layer, {}, {minZoomLevel: minZoomLevel, numZoomLevels: numZoomLevels});
t.eq( layer.resolutions.length, numZoomLevels, "length of resolutions array ok");
for (var i = 0; i < numZoomLevels; i++) {
t.eq( layer.resolutions[i], resolutions[i + minZoomLevel], "resolutions array at index " + i + " ok");
}
}
function test_getMapObjectZoomFromOLZoom(t) {
t.plan(4);
var map = new OpenLayers.Map("map", {allOverlays: true});
var xyz = new OpenLayers.Layer.XYZ("xyz", "${x}${y}${z}", {
sphericalMercator: true,
resolutions: [39135.7584765625, 19567.87923828125, 9783.939619140625]
});
var fixed = new (OpenLayers.Class(OpenLayers.Layer, OpenLayers.Layer.FixedZoomLevels, {
initialize: function() {
OpenLayers.Layer.prototype.initialize.apply(this, arguments);
}
}))("fixed", {
resolutions: [156543.03390625, 78271.516953125, 39135.7584765625, 19567.87923828125, 9783.939619140625],
minZoomLevel: 1
});
map.addLayers([xyz, fixed]);
map.setCenter(new OpenLayers.LonLat(0, 0), 2);
// map.getZoom() returns 2
t.eq(fixed.getMapObjectZoomFromOLZoom(map.getZoom()), 4, "correct return value from getMapObjectZoomFromOLZoom");
t.eq(fixed.getOLZoomFromMapObjectZoom(4), map.getZoom() - fixed.minZoomLevel, "correct return value from getOLZoomFromMapObjectZoom");
map.setBaseLayer(fixed);
// map.getZoom() returns 4 now
t.eq(fixed.getMapObjectZoomFromOLZoom(map.getZoom()), 5, "correct return value from getMapObjectZoomFromOLZoom");
t.eq(fixed.getOLZoomFromMapObjectZoom(5), map.getZoom(), "correct return value from getOLZoomFromMapObjectZoom");
}
function p_createLayer(layer, mapOptions, layerOptions) {
layer.map = mapOptions || {};
layer.options = layerOptions || {};
OpenLayers.Layer.FixedZoomLevels.prototype.initResolutions.apply(layer);
return layer;
}
function p_minMaxNum(t, layer, min, max, msg) {
t.eq( layer.minZoomLevel, min, "min zoom level inherited from layer constant: " + msg);
t.eq( layer.maxZoomLevel, max, "max zoom level inherited from layer constant: " + msg);
t.eq( layer.numZoomLevels, max - min + 1, "num zoom levels correctly calcuated: " + msg);
}
</script>
</head>
<body>
<div id="map" style="width:256px;height:256px"></div>
</body>
</html>
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