72 lines
1.9 KiB
JavaScript
72 lines
1.9 KiB
JavaScript
// FIXME works for View2D only
|
|
|
|
goog.provide('ol.interaction.KeyboardZoom');
|
|
|
|
goog.require('goog.asserts');
|
|
goog.require('goog.events.KeyHandler.EventType');
|
|
goog.require('ol.interaction.ConditionType');
|
|
goog.require('ol.interaction.Interaction');
|
|
goog.require('ol.interaction.condition');
|
|
|
|
|
|
/**
|
|
* @define {number} Zoom duration.
|
|
*/
|
|
ol.interaction.KEYBOARD_ZOOM_DURATION = 100;
|
|
|
|
|
|
|
|
/**
|
|
* @constructor
|
|
* @param {ol.interaction.KeyboardZoomOptions=} opt_options Options.
|
|
* @extends {ol.interaction.Interaction}
|
|
*/
|
|
ol.interaction.KeyboardZoom = function(opt_options) {
|
|
|
|
goog.base(this);
|
|
|
|
var options = goog.isDef(opt_options) ? opt_options : {};
|
|
|
|
/**
|
|
* @private
|
|
* @type {ol.interaction.ConditionType}
|
|
*/
|
|
this.condition_ = goog.isDef(options.condition) ?
|
|
options.condition : ol.interaction.condition.noModifierKeys;
|
|
|
|
/**
|
|
* @private
|
|
* @type {number}
|
|
*/
|
|
this.delta_ = goog.isDef(options.delta) ? options.delta : 1;
|
|
|
|
};
|
|
goog.inherits(ol.interaction.KeyboardZoom, ol.interaction.Interaction);
|
|
|
|
|
|
/**
|
|
* @inheritDoc
|
|
*/
|
|
ol.interaction.KeyboardZoom.prototype.handleMapBrowserEvent =
|
|
function(mapBrowserEvent) {
|
|
var stopEvent = false;
|
|
if (mapBrowserEvent.type == goog.events.KeyHandler.EventType.KEY) {
|
|
var keyEvent = /** @type {goog.events.KeyEvent} */
|
|
(mapBrowserEvent.browserEvent);
|
|
var charCode = keyEvent.charCode;
|
|
if (this.condition_(keyEvent) &&
|
|
(charCode == '+'.charCodeAt(0) || charCode == '-'.charCodeAt(0))) {
|
|
var map = mapBrowserEvent.map;
|
|
var delta = (charCode == '+'.charCodeAt(0)) ? this.delta_ : -this.delta_;
|
|
map.requestRenderFrame();
|
|
// FIXME works for View2D only
|
|
var view = map.getView().getView2D();
|
|
ol.interaction.Interaction.zoomByDelta(map, view, delta, undefined,
|
|
ol.interaction.KEYBOARD_ZOOM_DURATION);
|
|
mapBrowserEvent.preventDefault();
|
|
stopEvent = true;
|
|
}
|
|
}
|
|
return !stopEvent;
|
|
};
|