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<html>
<head>
<script src="../OLLoader.js"></script>
<script type="text/javascript">
function test_initialize(t) {
t.plan(4);
control = new OpenLayers.Control.NavigationHistory();
t.ok(control instanceof OpenLayers.Control.NavigationHistory,
"constructor returns correct instance");
t.eq(control.displayClass, "olControlNavigationHistory",
"displayClass is correct");
t.ok(control.next instanceof OpenLayers.Control.Button,
"constructor creates next control");
t.ok(control.previous instanceof OpenLayers.Control.Button,
"constructor creates previous control");
}
function test_destroy(t) {
t.plan(2);
control = new OpenLayers.Control.NavigationHistory();
control.next.destroy = function() {
t.ok(true, "destroy calls next.destroy");
}
control.previous.destroy = function() {
t.ok(true, "destroy calls previous.destroy");
}
control.destroy();
}
function test_previous(t) {
var numStates = 10;
t.plan(
numStates * 3 // for lon, lat, zoom
+ 3 // for confirming that previous with empty stack works
);
var history = new Array(numStates);
for(var i=0; i<numStates; ++i) {
history[i] = {
center: new OpenLayers.LonLat(
(i * 360 / numStates) - 180, (i * 180 / numStates) - 90
),
zoom: i
};
}
var map = new OpenLayers.Map("map");
var layer = new OpenLayers.Layer(
"test", {isBaseLayer: true}
);
map.addLayer(layer);
var control = new OpenLayers.Control.NavigationHistory();
map.addControl(control);
// set previous states
for(i=0; i<numStates; ++i) {
map.setCenter(history[i].center, history[i].zoom);
}
// test previous states
for(i=numStates-1; i>=0; --i) {
t.eq(map.getCenter().lon, history[i].center.lon, "(step " + i + ") lon correct");
t.eq(map.getCenter().lat, history[i].center.lat, "(step " + i + ") lat correct");
t.eq(map.getZoom(), history[i].zoom, "(step " + i + ") zoom correct");
control.previous.trigger();
}
// test previous with empty stack
t.eq(map.getCenter().lon, history[0].center.lon, "(step 0 again) lon correct");
t.eq(map.getCenter().lat, history[0].center.lat, "(step 0 again) lat correct");
t.eq(map.getZoom(), history[0].zoom, "(step 0 again) zoom correct");
}
function test_next(t) {
var numStates = 10;
t.plan(
numStates * 3 // for lon, lat, zoom
+ 3 // for confirming that next with empty stack works
);
var history = new Array(numStates);
for(var i=0; i<numStates; ++i) {
history[i] = {
center: new OpenLayers.LonLat(
(i * 360 / numStates) - 180, (i * 180 / numStates) - 90
),
zoom: i
};
}
var map = new OpenLayers.Map("map");
var layer = new OpenLayers.Layer(
"test", {isBaseLayer: true}
);
map.addLayer(layer);
var control = new OpenLayers.Control.NavigationHistory();
map.addControl(control);
// set previous states
for(i=0; i<numStates; ++i) {
map.setCenter(history[i].center, history[i].zoom);
}
// set next states
for(i=numStates-1; i>=0; --i) {
control.previous.trigger();
}
// test next states
for(i=0; i<numStates; ++i) {
t.eq(map.getCenter().lon, history[i].center.lon, "(step " + i + ") lon correct");
t.eq(map.getCenter().lat, history[i].center.lat, "(step " + i + ") lat correct");
t.eq(map.getZoom(), history[i].zoom, "(step " + i + ") zoom correct");
control.next.trigger();
}
// test next with empty stack
t.eq(map.getCenter().lon, history[numStates-1].center.lon, "(step " + (numStates-1) + " again) lon correct");
t.eq(map.getCenter().lat, history[numStates-1].center.lat, "(step " + (numStates-1) + " again) lat correct");
t.eq(map.getZoom(), history[numStates-1].zoom, "(step " + (numStates-1) + " again) zoom correct");
}
function test_limit(t) {
var numStates = 10;
var limit = 3;
t.plan(
numStates * 6 // for previous & next lon, lat, zoom
);
var history = new Array(numStates);
for(var i=0; i<numStates; ++i) {
history[i] = {
center: new OpenLayers.LonLat(
(i * 360 / numStates) - 180, (i * 180 / numStates) - 90
),
zoom: i
};
}
var map = new OpenLayers.Map("map");
var layer = new OpenLayers.Layer(
"test", {isBaseLayer: true}
);
map.addLayer(layer);
var control = new OpenLayers.Control.NavigationHistory({limit: limit});
map.addControl(control);
// set previous states
for(i=0; i<numStates; ++i) {
map.setCenter(history[i].center, history[i].zoom);
}
// test previous states (only up to limit should work)
var state;
for(i=numStates-1; i>=0; --i) {
state = Math.max(i, numStates - limit - 1);
t.eq(map.getCenter().lon, history[state].center.lon, "(previous step " + i + ") lon correct: state " + state);
t.eq(map.getCenter().lat, history[state].center.lat, "(previous step " + i + ") lat correct: state " + state);
t.eq(map.getZoom(), history[state].zoom, "(previous step " + i + ") zoom correct: state " + state);
control.previous.trigger();
}
// test next states
for(i=0; i<numStates; ++i) {
state = Math.min(numStates - 1, numStates - limit - 1 + i);
t.eq(map.getCenter().lon, history[state].center.lon, "(next step " + i + ") lon correct: state " + state);
t.eq(map.getCenter().lat, history[state].center.lat, "(next step " + i + ") lat correct: state " + state);
t.eq(map.getZoom(), history[state].zoom, "(next step " + i + ") zoom correct: state " + state);
control.next.trigger();
}
}
function test_clear(t) {
t.plan(7);
var map = new OpenLayers.Map("map", {zoomMethod: null});
var layer = new OpenLayers.Layer(
"test", {isBaseLayer: true}
);
map.addLayer(layer);
map.zoomToMaxExtent();
var control = new OpenLayers.Control.NavigationHistory();
map.addControl(control);
t.ok(!control.previous.active, "previous control not active");
t.ok(!control.next.active, "next control not active");
map.zoomTo(4);
t.ok(control.previous.active, "previous control is active after a move");
t.ok(!control.next.active, "next control is not active after a move");
control.clear();
t.eq(control.previousStack.length + control.nextStack.length, 0, "stacks are empty after a clear");
t.ok(!control.previous.active, "previous control not active after a clear");
t.ok(!control.next.active, "next control not active after a clear");
control.destroy();
}
function test_reprojection(t) {
t.plan(2);
var map = new OpenLayers.Map("map");
var layer = new OpenLayers.Layer(
"test", {isBaseLayer: true}
);
map.addLayer(layer);
map.zoomToMaxExtent();
var control = new OpenLayers.Control.NavigationHistory();
map.addControl(control);
map.zoomTo(4);
var bounds = map.getExtent().clone();
var expected = bounds.transform(new OpenLayers.Projection('EPSG:4326'),
new OpenLayers.Projection('EPSG:900913'));
// change the projection to EPSG:900913
var projSettings = {
units: "m",
maxExtent: new OpenLayers.Bounds(-20037508, -20037508, 20037508, 20037508),
maxResolution: 156543.0339
};
map.setOptions(projSettings);
map.projection = 'EPSG:900913';
delete projSettings.maxResolution;
projSettings.projection = new OpenLayers.Projection('EPSG:900913');
layer.addOptions(projSettings);
layer.initResolutions();
map.zoomTo(7);
// go back one in the history
control.previous.trigger();
t.eq(map.getExtent().left.toFixed(3), expected.left.toFixed(3), "The extent [left] is reprojected correctly");
t.eq(map.getExtent().right.toFixed(3), expected.right.toFixed(3), "The extent [right] is reprojected correctly");
// top and bottom cannot be checked here since in EPSG:900913 the extent is not a rectangle so they are adjusted.
control.destroy();
}
</script>
</head>
<body>
<div id="map" style="width: 100px; height: 100px;"/>
</body>
</html>
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