I have an Openlayers3-map with more than one WMS-Layer. I want to add a button (for every queryable layer) so the user can decide to query the wms-layer or not.
var getfeature = function(click) {
map.on(click, function (evt) {
document.getElementById('info').innerHTML = '';
var viewResolution = (view.getResolution());
var url = wms_url.getGetFeatureInfoUrl(
evt.coordinate, viewResolution, projection,
{
'INFO_FORMAT': 'text/html'
});
if (url) {
document.getElementById('info').innerHTML =
'<iframe seamless src="' + url + '"></iframe>';
}
});
}
This part works fine so far.
Now combine the getfeature-request with the "user-interface" (here just a checkbox)
var userquery = function() {
var $input = $( this );
//checkbox true/false
if($input.prop("checked")) {
//change cursor appearance
map.getViewport().style.cursor = 'help';
//getfeature-request on singleclick
getfeature('singleclick');
}
else {
//change cursor appearance, when checkbox is unchecked
map.getViewport().style.cursor = '';
//WHAT TO DO HERE???
//...
}
};
the checkbox with id="cursor10"
var checkbox = document.getElementById('cursor10');
and add the functionality via
checkbox.onchange = userquery;
At the moment the getfeature-function is continue working once it's activated.
What do I need to do, so the getfeature function will stop working when the checkbox is unchecked? Or any ideas for another approach?
You can use the unByKey() function to unregister the event listener of the map by its key
see: http://jsfiddle.net/d1wrkb95/2/