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How to trigger events on Leaflet map polygons?
OK, I’ve figured it out. You need to create a click event for each polygon that opens the popup, and assign a unique ID to each polygon so you can reference it later and manually trigger its popup. Then to manually trigger a specific layers click event, simply call it like this:
How can I identify an object in a leaflet?
One approach that I have tried (and which works) is to identify the object in the leaflet layer and to trigger a click event using layer [id].fireEvent (‘click’). However, this requires that I know the object ID and I would like to be able to just use a lat/lon to trigger this click.
What does the click event return in leaflet?
The click event in leaflet returns lat, lng and id (and a random value). So you can only access one of those elements. The id value relates to the layerId you specify in the shape plotting function, so in your case that’s layerId=~admin.
Why does shiny leaflet ploygon click event not work?
I assume when I write p <- input$Map_shape_click shiny would know p is a business object so it has column admin and I have reference this admin ID to refresh my Business drop down list. But it doesn’t work.The link shows what I am seeing – the list wouldn’t refresh when I click a different country.
How to use a shiny leaflet widget in an app?
Most Shiny output widgets are incorporated into an app by including an output (e.g. plotOutput) for the widget in the UI definition, and using a render function (e.g. renderPlot) in the server function. Leaflet maps are no different; in the UI you call leafletOutput, and on the server side you assign a renderLeaflet call to the output.
How does a leaflet get input from shiny?
Leaflet maps and objects send input values (which we’ll refer to as “events” in this document) to Shiny as the user interacts with them. Object event names generally use this pattern: So for a leafletOutput (“mymap”) had a circle on it, clicking on that circle would update the Shiny input at input$mymap_shape_click.
How are shiny output widgets integrated with shiny applications?
The Leaflet package includes powerful and convenient features for integrating with Shiny applications. Most Shiny output widgets are incorporated into an app by including an output (e.g. plotOutput) for the widget in the UI definition, and using a render function (e.g. renderPlot) in the server function.
How to prevent Leaflet map draggable marker event bug?
And this click will trigger the popup if you binded one to it. Leaflet is smart enough to prevent this click when Leaflet itself is managing the drag, but if you do it by yourself it’s out of its jurisdiction. You can try to duck simulate, but this will need anyway a sort of handler, as in #4628.
Why do I get a click event on leaflet?
Your browser will issue a click event when you finish your drag and mouse up. And this click will trigger the popup if you binded one to it. Leaflet is smart enough to prevent this click when Leaflet itself is managing the drag, but if you do it by yourself it’s out of its jurisdiction.