I'd like to move/drag geojson features on map so that the distance to each other stays the same.
Choose geojsons by clicking them and then dragging them together. How should I make this?
Thanks!
I read about syncLayersOnDrag but can not get it to work.
If you set syncLayersOnDrag after adding the layer, it works
// data are coming from smaple-geojson.js
const geoLayer = L.geoJSON([bicycleRental, campus]).addTo(map)
map.fitBounds(geoLayer.getBounds())
map.pm.setGlobalOptions({
syncLayersOnDrag: true
});
https://jsfiddle.net/zba1ogjL/
Related
I would need some information on list markers:
how can I change the opacity of the list and also the background color
how can I set the overflow so that if the markers in the list increase, they scroll through the
scrollbar?
Thanks
This is clearly not a leaflet element, to change the transparency of the object that you specified, you most likely need to change these properties in the css, try using DeveloperTools in the browser to find where this object takes the properties (transparency) from and you will know how to change it correctly.
Example
If I understand your question correctly, here is an approximate way to do what you ask in the first part of the question. Show your code what it looks like now.
.className {
background: white;
}
let marker = L.circle([50.0], [40.0]], {opacity: 1}).addTo(map),
marker.className = "className";
no I don't mean the transparency of the single marker but of the list, I send a photo in which the list is circled.
I don't know in which part of the library to act to give properties to this list element.
I have a google layer (baselayer) GoogleMutant and want to update its options. I try to
map.remove(google.layer)
//update the POI visibility
google.layer.options.styles.forEach(i=>i.stylers[0].visibility = "off")
map.addLayer(google.layer)
this updates the layer options but the Points of interest are still on the map. Is there any way to update the options and apply them to the baselayer?
Thanks
Here is an example with google mutant https://jsfiddle.net/benderlio/2m4c01w6/10/
There is a button "remove POI", and I want to remove all poi from current layer with leaflet API
Leaflet doesn't work changing settings on the fly. You have to remove the whole object and create a substitute.
Like if you need to change a layer, you have to remove it like:
roadMutant.removeFrom(map); // or
map.removeLayer(roadMutant);
And then create and add the new one:
roadMutant.addTo(map);
I created a fiddle to help the change based on yours. It still have bugs and somewhere to grow, but it's a base...
I'm trying to add clustering and layer control to filter markers on my map. After reading older posts on this issue, the code that was marked as the right answer looks like this. However, no matter how I change it, it does not work on my map.
var parent= new L.MarkerClusterGroup().addTo(map);
var overlay={}
overlay["Markers A"]=L.featureGroup.subGroup(parent,aPoints).addTo(map);
overlay["Markers B"]=L.featureGroup.subGroup(parent,bPoints).addTo(map);
control = L.control.layers(null, overlay, {collapsed: false });
control.addTo(map);
What am I doing wrong?
The issue that I was having was that L.featureGroup.subGroup takes in an array of markers as it's second parameters therefore, aPoints needed to be [aPoints].
I'm reading an imageOverlay URL from an ArcGIS webserver that uses the leaflet getBound() coordinates as part of the URL (we have large maps that are filtered for the current window 'extent'). Apologies for not including the actual path (I'm working with sensitive client data). Eg:
http://myarcgiswebserver.com/MapServer/export/dpi=96&format=png32&bbox=27.119750976562504%2C-31.194007509998823%2C32.39044189453126%2C-29.692824739380754&size=1719%2C434
[bbox] = current imageBounds
When dragging my map the imageOverlay url is updated correctly but my leaflet window is no longer aligned to the imageBound values that were set when first adding the imageOverlay which results in a skewed output (this is my assumption):
The only workaround is to remove the existing imageOverlay and add a new one (which ruins the user experience as the map disappears then reappears each time the window is dragged or zoomed).
Am i approaching this problem incorrectly or would the introduction of a function to update the current imageBounds resolve this? Perhaps not a new function but the expansion of setUrl with additional parameters...?
Many thanks for any feedback...
As #ghybs pointed out, your use case might be better served by using the WMS
interface of your ArcGIS server.
Anyway, you say
The only workaround is to remove the existing imageOverlay and add a new one (which ruins the user experience as the map disappears then reappears each time the window is dragged or zoomed).
Well, that glitch is due to you probably doing something like:
Remove old overlay
Add new overlay
Wait until the image is received from the network
Wait one frame so the new overlay is shown
and instead you should be doing something like:
Add new overlay
Wait until the image is received from the network
Remove old overlay
Wait one frame so the new overlay is shown
The problem is just the async wait and the possible race conditions there, but should be easy to hack together, e.g.:
var activeOverlay = null;
var overlayInRequest = null;
map.on('moveend zoomend', {
// If we are already requesting a new overlay, ignore it.
// This might need some additional debouncing logic to prevent
// lots of concurrent requests
if (overlayInRequest) {
overlayInRequest.off('load', showOverlay);
}
overlayInRequest = L.imageOverlay( computeUrl( map.getBounds() ), myOverlayOptions );
overlayInRequest.on('load', showOverlay);
});
function showOverlay(ev) {
activeOverlay.remove();
activeOverlay = overlayInRequest;
activeOverlay.addTo(map);
overlayInRequest = undefined;
}
If you use an ImageOverlay but change its url dynamically, with a new image that reflects a new bounding box, then indeed that is the reason for the behaviour you describe: you display an image that has been generated using a new bbox, but positioned in the initial bbox, since the image overlay remains at the same geographical position on the map.
Instead, it sounds to me that you should use a TileLayer.WMS.
It would automatically manage the bounding box update for you. You may need to find the correct options to fit your service provider required URL syntax, though.
Example: http://playground-leaflet.rhcloud.com/yel/1/edit?html,output
In Leaflet, is it possible to define a marker or polyline with {clickable:false}, so that a click is passed through to whatever lies beneath - be it the map or a clickable geometry object?
At the moment I solve this problem by making the marker/polyline clickable and passing the event onwards myself. But this leads to the mouse cursor always showing as the hand symbol. Ideally, the mouse cursor should look like the normal pointer or the hand, depending on whether what is beneath the marker/polyline is clickable.
This may not be the answer you are looking for, but you can use featureGroups to have all of your clickable polylines come to the front so that the actions are surfaced.
var lg_noclick = new L.FeatureGroup().addTo(map);
var lg_click = new L.FeatureGroup().addTo(map);
// Add lines
lg_click.bringToFront();
updated fiddle
Also if you can afford to know your lines before hand, correct ordering of when you add the lines it will work as well.
I know this is not ideal but it suited my situation just fine, so it might be good for you as well.
This hides the icon and brings it back after a second using mouseenter and mouseleave events:
$('.leaflet-marker-icon').mouseenter(function() {
$(this).hide();
});
$('.leaflet-marker-icon').mouseleave(function() {
$(this).delay(1000).show(0);
});