add a click handler

src/ol/handler/Click.js

@@ -0,0 +1,63 @@
+/**
+ * @fileoverview Click Handler.
+ *
+ * Provides a class for listening to click events on a DOM element
+ * and re-dispatching to a map instance.
+ *
+ * This handler has no default behaviour.
+ */
+
+goog.provide('ol.handler.Click');
+
+goog.require('goog.asserts');
+goog.require('goog.events');
+goog.require('goog.events.EventType');
+goog.require('goog.Disposable');
+
+
+/**
+ * @constructor
+ * @extends {goog.Disposable}
+ * @param {ol.Map} map The map instance.
+ * @param {Element} elt The element we listen to mousewheel on.
+ * @param {Object} states An object for the handlers to share states.
+ */
+ol.handler.Click = function(map, elt, states) {
+    goog.base(this);
+
+    /**
+     * @type {ol.Map}
+     */
+    this.map_ = map;
+
+    /**
+     * @type {Element}
+     */
+    this.elt_ = elt;
+
+    /**
+     * @type {Object}
+     */
+    this.states_ = states;
+
+    goog.events.listen(this.elt_, goog.events.EventType.CLICK,
+                       this.handleClick, undefined, this);
+};
+goog.inherits(ol.handler.Click, goog.Disposable);
+
+/**
+ * @inheritDoc
+ */
+ol.handler.Click.prototype.disposeInternal = function() {
+    goog.events.unlisten(this.elt_, goog.events.EventType.CLICK,
+                         this.handleClick, undefined, this);
+};
+
+/**
+ * @param {goog.events.BrowserEvent} e
+ */
+ol.handler.Click.prototype.handleClick = function(e) {
+    if (!this.states_.dragged) {
+        goog.events.dispatchEvent(this.map_, e);
+    }
+};