Questions tagged [event-listener]
In computing an event is an action that is usually initiated outside the scope of a program and that is handled by a piece of code inside the program
1
vote
1answer
25 views
QgsMapToolEmitPoint.canvasReleaseEvent not firing with SHIFT modifier
I've created a plugin that implements a Map Tool. It captures mouse click events, which works fine. Now I want to capture Shift+Mouseclick. This doesn't work at all, while Alt+Mouseclick and Ctrl+...
0
votes
0answers
73 views
How to listen to touch events on Leaflet GeoJSON linestrings?
I'm using react-leaflet to display a map with GeoJSON linestrings and points. My mouseOver, mouseOut, and click events work fine with a mouse. However, I can't get the tap or touch events to work on ...
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0answers
64 views
Difference between an interaction and eventListener in OpenLayers
I am wondering when should I use an interaction instead of an eventListener.
For example I can have a handler function like this:
function handler(evt) {
if (evt.type === 'click') {
console....
2
votes
0answers
647 views
Listen to a click event inside bindpopup with Leaflet
I'm using Leaflet, I have bound popups to layers, and created a popupopen event listener on the map as follow:
map.on('popupopen', this._managePopUp.bind(this));
_managePopUp(layer) {
...
1
vote
1answer
18 views
How do you retrieve a single attribute from a feature layer by clicking on it using ArcGIS Javascript API v3.2?
I am building a map that you can hover over and click on. I need to access a feature's project number (ProjectNum) when I click on it, but my click event on the layer doesn't seem to be firing. When I ...
0
votes
1answer
51 views
List of possible events from event handler
This may be an elementary question but I cannot figure out how to word it so that I can google it properly.
map.on('click', function(evt) {
var coordinates = evt.coordinate;
alert(coordinates)...
1
vote
2answers
501 views
OpenLayers 4 hover popup delay
I added a function to display a popup on hover to the feature layer but it doesn't work very well.
Here my code:
map.on('pointermove', function(evt) {
if (evt.dragging) {
return;
}
var ...
0
votes
1answer
290 views
OpenLayers 2 loadstart and loadend
I want to add a loading symbol to my openlayers map, which is triggered when a layer is set to load and stopped when the layer is loaded. So I used the event listeners loadstart and loaded. Here is my ...
0
votes
1answer
358 views
Calling a function after map display rather than map load
I have the following method which I am calling on load of the map. However when I try to turn on a particular layer within this code I am unsuccessful as although the map would have been loaded it ...
0
votes
1answer
352 views
How to determine whether a map click event has been set?
The Evented section of the Leaflet documentation shows how to set an event listener for the map object:
Leaflet deals with event listeners by reference, so if you want to add
a listener and then ...
3
votes
3answers
164 views
Clear Points and Replot a new one
Is it possible to reset or clear the map and plot new points? I have a search box that am using to query a geojson API.
After the first mapped result, the second search is plotted in addition which ...
1
vote
1answer
227 views
Displaying results through polygon tool on Leaflet map using event listeners
I have certain documents residing on within my database. Currently i am able to display their Geojson on the map by drawing a polyogon within a certain area and then clicking on a button but i want to ...
3
votes
1answer
488 views
How to detect when new markers have been added to the leaflet map?
May i ask how to I add a event listener to the map to detect when a marker has been added to the map?
In the docs, it says that we can use the "add" event, but how do I actually use it?
http://...
1
vote
0answers
775 views
An OL3 listener seems undefined as reported by ol-debug.js [closed]
I am using ol3/3.15.1/ol-debug.js, and get the error message in the console:
ol-debug.js:6326 Uncaught TypeError: Cannot read property 'call' of undefined
at ol.source.Vector.ol.events....
2
votes
1answer
694 views
Cannot catch click event on FeatureLayer in ArcGIS API for JavaScript 4?
I've got a SceneView with a FeatureLayer, and I'm trying to catch every click on a PictureMarkerSymbol to display additional data under the map.
The map works well, so do symbols and popups, but I ...
3
votes
2answers
1k views
Watching for scale/zoom changes in ArcGIS API for JavaScript 4?
I am trying to add an event listener for when the scale of the map changes, that is scale or zoom level changes in order to enable or disable feature layer label text. When the user zooms in to a ...
1
vote
0answers
247 views
How to bind the 'mouseover' event in a leaflet-routing route?
I'm trying to mimic the GoogleMaps behavior of creating a small white circular marker on a route when you hover on the route.
My idea is to listen for the 'mouseover' event (if there is any) and then ...
2
votes
1answer
2k views
Getting multiple functions to work with mouseover event in Leaflet
I am making a web mapping app using leaflet and some geoJSON data for a grid. I want to be able to mouseover each grid cell and both highlight that cell AND show a popup of the coordinates. In the ...
0
votes
1answer
64 views
Multiple Selection with OL2
I created a map with some marker which can be selected and have them name appears in an external field. But i even if i am able to select multiple marker on the map ( shift command ), only one name ...
2
votes
1answer
539 views
Multiple Selection
I implemented a map with markers pointing to airports, and when I click on a marker the name of the airport appears in a field. (All date included in a GEOJson external file). I just have a last ...
1
vote
0answers
178 views
OpenLayers 3, map.on('moveend',..): Differentiate between user interaction and map.setCenter() calling
I am implementing OpenLayers for a GIS application and want to add a 20 seconds timeout when the user scrolled the map, after which the GPS auto track function should resume.
For that I am utilizing ...
1
vote
1answer
3k views
why can't I load a layers list to select from to the map in openLayers 3, addEventListener and attachEvent are unavailable
I've tried to incorporate this sample that shows how to switch base layers into a page I am working on:
http://openlayers.org/en/v3.10.1/examples/bing-maps.html
When I try to load my page with the ...
