Jeremy Hunts Jeremy Hunts - 14 days ago 12
Javascript Question

leaflet Js custom control button add (text, hover)

I followed this control-button-leaflet tutorial and it worked for me. Now I want to:


  1. show some text when i hover over the button (like with the zoom buttons)

  2. Change the color of the button when i hover over it

  3. be able to write text inside the button instead of an image.



Here's the code:

var customControl = L.Control.extend({
options: {
position: 'topleft'
},

onAdd: function (map) {
var container = L.DomUtil.create('div', 'leaflet-bar leaflet-control leaflet-control-custom');

container.style.backgroundColor = 'white';
container.style.backgroundImage = "url(http://t1.gstatic.com/images?q=tbn:ANd9GcR6FCUMW5bPn8C4PbKak2BJQQsmC-K9-mbYBeFZm1ZM2w2GRy40Ew)";
container.style.backgroundSize = "30px 30px";
container.style.width = '30px';
container.style.height = '30px';

container.onclick = function(){
console.log('buttonClicked');
}

return container;
}
});

var map;

var readyState = function(e){
map = new L.Map('map').setView([48.935, 18.14], 14);
L.tileLayer('http://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png').addTo(map);
map.addControl(new customControl());
}

window.addEventListener('DOMContentLoaded', readyState);

Answer

It seems you more need a Button than a div:

    var container = L.DomUtil.create('input');
    container.type="button";
  1. Then you can easily set a mouseover text:

    container.title="No cat";
    
  2. And some Text instead of an image:

    container.value = "42";
    
  3. And you can use the mouse events to style the button:

    container.onmouseover = function(){
      container.style.backgroundColor = 'pink'; 
    }
    container.onmouseout = function(){
      container.style.backgroundColor = 'white'; 
    }
    

(you could of course do this last part with css, might be more elegant)

Full example: http://codepen.io/anon/pen/oXVMvy

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