Sha256: f30a02084812925e7e4b5af59e32d9d4b1d00dbdc621307a64dc6dad946291ae
Contents?: true
Size: 1.6 KB
Versions: 8
Compression:
Stored size: 1.6 KB
Contents
/*
* L.Handler.ScrollWheelZoom is used by L.Map to enable mouse scroll wheel zoom on the map.
*/
L.Map.mergeOptions({
scrollWheelZoom: true
});
L.Map.ScrollWheelZoom = L.Handler.extend({
addHooks: function () {
L.DomEvent.on(this._map._container, 'mousewheel', this._onWheelScroll, this);
L.DomEvent.on(this._map._container, 'MozMousePixelScroll', L.DomEvent.preventDefault);
this._delta = 0;
},
removeHooks: function () {
L.DomEvent.off(this._map._container, 'mousewheel', this._onWheelScroll);
L.DomEvent.off(this._map._container, 'MozMousePixelScroll', L.DomEvent.preventDefault);
},
_onWheelScroll: function (e) {
var delta = L.DomEvent.getWheelDelta(e);
this._delta += delta;
this._lastMousePos = this._map.mouseEventToContainerPoint(e);
if (!this._startTime) {
this._startTime = +new Date();
}
var left = Math.max(40 - (+new Date() - this._startTime), 0);
clearTimeout(this._timer);
this._timer = setTimeout(L.bind(this._performZoom, this), left);
L.DomEvent.preventDefault(e);
L.DomEvent.stopPropagation(e);
},
_performZoom: function () {
var map = this._map,
delta = this._delta,
zoom = map.getZoom();
delta = delta > 0 ? Math.ceil(delta) : Math.floor(delta);
delta = Math.max(Math.min(delta, 4), -4);
delta = map._limitZoom(zoom + delta) - zoom;
this._delta = 0;
this._startTime = null;
if (!delta) { return; }
if (map.options.scrollWheelZoom === 'center') {
map.setZoom(zoom + delta);
} else {
map.setZoomAround(this._lastMousePos, zoom + delta);
}
}
});
L.Map.addInitHook('addHandler', 'scrollWheelZoom', L.Map.ScrollWheelZoom);
Version data entries
8 entries across 8 versions & 1 rubygems