I am having an issue where I want to use zoomToMaxExtent(), but it isn't
showing the whole map (or in this case, an image). I notice that when it is
zoomed out but not far enough to show the whole image, it is returning the
zoom level as 0. I guess I cannot zoom negative, but why does it think this
is 0 zoom? all the images are the same number of pixels as their longest
dimension, so I don't know why there is so much difference in where zoom
level 0 is.
This is my code:
function render_details(artwork, markers){
var img = new Image();
img.src = artwork.detail;
img.onload = function(){
var artWidth = img.width;
var artHeight = img.height;
var maxExtent = new OpenLayers.Bounds(0, 0, artWidth,
artHeight);
var graphic = new OpenLayers.Layer.Image(
'Title',
img.src,
//new OpenLayers.Bounds(150, 0, 1080, 240),
maxExtent,
new OpenLayers.Size(244,
getDetailsY(artWidth,artHeight)),
{numZoomLevels: 4, isBaseLayer: true, ratio : 1.0}
);
map = new OpenLayers.Map('detailsdiv', {
projection : 'EPSG:3785',
units : 'm',
fractionalZoom : true,
maxResolution: Math.pow(2, graphic.numberOfTiers - 1),
numZoomLevels : graphic.numberOfTiers,
controls: [
new OpenLayers.Control.TouchNavigation({
dragPanOptions: {
enableKinetic: true
}
})
]
});
map.addLayers([graphic]);
//go back to where the map last was if mapbounds is set (as in
when
returning from looking at pin details). BUG: will zoom one level back on
mobile, but not desktop.
if (mapbounds){
map.zoomToExtent(mapbounds);
mapbounds = false;
} else {
map.zoomToMaxExtent();
map.zoomOut();
//set maximum default zoom.
maxDefaultZoom = 9;
zoom = map.getZoom();
if (zoom > maxDefaultZoom){
map.zoomTo (maxDefaultZoom);
}
}
};
}
--
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http://osgeo-org.1560.n6.nabble.com/zooming-out-past-0-or-making-zoom-0-display-whole-image-tp5035569.html
Sent from the OpenLayers Users mailing list archive at Nabble.com.
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