File size: 4,456 Bytes
d2efaca |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 |
import {Control} from './Control';
import {Map} from '../map/Map';
import * as DomUtil from '../dom/DomUtil';
import * as DomEvent from '../dom/DomEvent';
/*
* @class Control.Zoom
* @aka L.Control.Zoom
* @inherits Control
*
* A basic zoom control with two buttons (zoom in and zoom out). It is put on the map by default unless you set its [`zoomControl` option](#map-zoomcontrol) to `false`. Extends `Control`.
*/
export var Zoom = Control.extend({
// @section
// @aka Control.Zoom options
options: {
position: 'topleft',
// @option zoomInText: String = '<span aria-hidden="true">+</span>'
// The text set on the 'zoom in' button.
zoomInText: '<span aria-hidden="true">+</span>',
// @option zoomInTitle: String = 'Zoom in'
// The title set on the 'zoom in' button.
zoomInTitle: 'Zoom in',
// @option zoomOutText: String = '<span aria-hidden="true">−</span>'
// The text set on the 'zoom out' button.
zoomOutText: '<span aria-hidden="true">−</span>',
// @option zoomOutTitle: String = 'Zoom out'
// The title set on the 'zoom out' button.
zoomOutTitle: 'Zoom out'
},
onAdd: function (map) {
var zoomName = 'leaflet-control-zoom',
container = DomUtil.create('div', zoomName + ' leaflet-bar'),
options = this.options;
this._zoomInButton = this._createButton(options.zoomInText, options.zoomInTitle,
zoomName + '-in', container, this._zoomIn);
this._zoomOutButton = this._createButton(options.zoomOutText, options.zoomOutTitle,
zoomName + '-out', container, this._zoomOut);
this._updateDisabled();
map.on('zoomend zoomlevelschange', this._updateDisabled, this);
return container;
},
onRemove: function (map) {
map.off('zoomend zoomlevelschange', this._updateDisabled, this);
},
disable: function () {
this._disabled = true;
this._updateDisabled();
return this;
},
enable: function () {
this._disabled = false;
this._updateDisabled();
return this;
},
_zoomIn: function (e) {
if (!this._disabled && this._map._zoom < this._map.getMaxZoom()) {
this._map.zoomIn(this._map.options.zoomDelta * (e.shiftKey ? 3 : 1));
}
},
_zoomOut: function (e) {
if (!this._disabled && this._map._zoom > this._map.getMinZoom()) {
this._map.zoomOut(this._map.options.zoomDelta * (e.shiftKey ? 3 : 1));
}
},
_createButton: function (html, title, className, container, fn) {
var link = DomUtil.create('a', className, container);
link.innerHTML = html;
link.href = '#';
link.title = title;
/*
* Will force screen readers like VoiceOver to read this as "Zoom in - button"
*/
link.setAttribute('role', 'button');
link.setAttribute('aria-label', title);
DomEvent.disableClickPropagation(link);
DomEvent.on(link, 'click', DomEvent.stop);
DomEvent.on(link, 'click', fn, this);
DomEvent.on(link, 'click', this._refocusOnMap, this);
return link;
},
_updateDisabled: function () {
var map = this._map,
className = 'leaflet-disabled';
DomUtil.removeClass(this._zoomInButton, className);
DomUtil.removeClass(this._zoomOutButton, className);
this._zoomInButton.setAttribute('aria-disabled', 'false');
this._zoomOutButton.setAttribute('aria-disabled', 'false');
if (this._disabled || map._zoom === map.getMinZoom()) {
DomUtil.addClass(this._zoomOutButton, className);
this._zoomOutButton.setAttribute('aria-disabled', 'true');
}
if (this._disabled || map._zoom === map.getMaxZoom()) {
DomUtil.addClass(this._zoomInButton, className);
this._zoomInButton.setAttribute('aria-disabled', 'true');
}
}
});
// @namespace Map
// @section Control options
// @option zoomControl: Boolean = true
// Whether a [zoom control](#control-zoom) is added to the map by default.
Map.mergeOptions({
zoomControl: true
});
Map.addInitHook(function () {
if (this.options.zoomControl) {
// @section Controls
// @property zoomControl: Control.Zoom
// The default zoom control (only available if the
// [`zoomControl` option](#map-zoomcontrol) was `true` when creating the map).
this.zoomControl = new Zoom();
this.addControl(this.zoomControl);
}
});
// @namespace Control.Zoom
// @factory L.control.zoom(options: Control.Zoom options)
// Creates a zoom control
export var zoom = function (options) {
return new Zoom(options);
};
|