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adding getPixelFromLonLat() function to Map.js -- the code is lifted from OpenLayers.Layer.Marker's drawMarker() function. also test added to ensure both translation functions return valid objects and that going back and forth is consistent. Note that i only test pixel-lonlat-pixel, because going from lonlat-pixel-lonlat there is loss due to the rounding in the lonlat-pixel phase

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git-svn-id: http://svn.openlayers.org/trunk/openlayers@246 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
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euzuro
2006-05-22 09:55:20 +00:00
parent af7dc7661a
commit 78588aa8ea
2 changed files with 36 additions and 0 deletions
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19
tests/test_Map.html
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@@ -113,6 +113,25 @@
}
function test_08_Map_px_lonlat_translation (t) {
t.plan( 3 );
map = new OpenLayers.Map($('map'));
map.setCenter(new OpenLayers.LonLat(0, 0), 0);
var pixel = new OpenLayers.Pixel(50,150);
var lonlat = map.getLonLatFromPixel(pixel);
t.ok( lonlat instanceof OpenLayers.LonLat, "getLonLatFromPixel returns valid OpenLayers.LonLat" );
var newPixel = map.getPixelFromLonLat(lonlat);
t.ok( newPixel instanceof OpenLayers.Pixel, "getPixelFromLonLat returns valid OpenLayers.Pixel" );
// WARNING!!! I'm faily sure that the following test's validity
// depends highly on rounding and the resolution. For now,
// in the default case, it seems to work. This may not
// always be so.
t.ok( newPixel.equals(pixel), "Translation to pixel and back to lonlat is consistent");
}
function test_99_Map_destroy (t) {
t.plan( 2 );
map = new OpenLayers.Map($('map'));