57 lines
1.5 KiB
JavaScript
57 lines
1.5 KiB
JavaScript
goog.provide('ol.handler.Drag');
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goog.require('goog.fx.Dragger');
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goog.require('goog.events');
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goog.require('goog.Disposable');
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/**
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* @constructor
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* @extends {goog.Disposable}
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* @param {ol.Map} map The map instance.
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* @param {Element} elt The element that will be dragged.
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*/
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ol.handler.Drag = function(map, elt) {
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var dragger = new goog.fx.Dragger(elt);
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this.registerDisposable(dragger);
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dragger.defaultAction = function() {};
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var prevX = 0, prevY = 0;
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var handleDragStart = function(e) {
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prevX = e.clientX;
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prevY = e.clientY;
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var newE = {
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type: 'dragstart'
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};
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goog.events.dispatchEvent(map, newE);
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};
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var handleDrag = function(e) {
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var newE = {
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type: 'drag',
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deltaX: e.clientX - prevX,
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deltaY: e.clientY - prevY
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};
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prevX = e.clientX;
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prevY = e.clientY;
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goog.events.dispatchEvent(map, newE);
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};
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var handleDragEnd = function(e) {
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var newE = {
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type: 'dragend'
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};
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goog.events.dispatchEvent(map, newE);
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};
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goog.events.listen(dragger, goog.fx.Dragger.EventType.START,
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handleDragStart, false, this);
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goog.events.listen(dragger, goog.fx.Dragger.EventType.DRAG,
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handleDrag, false, this);
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goog.events.listen(dragger, goog.fx.Dragger.EventType.END,
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handleDragEnd, false, this);
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};
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goog.inherits(ol.handler.Drag, goog.Disposable);
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