56 lines
1.6 KiB
JavaScript
56 lines
1.6 KiB
JavaScript
goog.provide('ol.event.Drag');
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goog.require('ol.event.ISequence');
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goog.require('ol.event');
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goog.require('goog.fx.Dragger');
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goog.require('goog.fx.DragEvent');
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goog.require('goog.fx.Dragger.EventType');
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/**
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* @constructor
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* @param {ol.event.Events} target The Events instance that handles events.
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* @implements {ol.event.ISequence}
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* @export
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*/
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ol.event.Drag = function(target) {
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var previousX = 0, previousY = 0,
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element = target.getElement(),
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dragger = new goog.fx.Dragger(element);
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/**
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* @private
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* @type {goog.fx.Dragger}
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*/
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this.dragger_ = dragger;
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dragger.defaultAction = function(x, y) {};
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dragger.addEventListener(goog.fx.Dragger.EventType.START, function(evt) {
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evt.target = element;
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evt.type = 'dragstart';
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previousX = evt.clientX;
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previousY = evt.clientY;
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target.triggerEvent(evt.type, evt);
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});
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dragger.addEventListener(goog.fx.Dragger.EventType.DRAG, function(evt) {
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evt.target = element;
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evt.dx = evt.clientX - previousX;
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evt.dy = evt.clientY - previousY;
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previousX = evt.clientX;
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previousY = evt.clientY;
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target.triggerEvent(evt.type, evt);
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});
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dragger.addEventListener(goog.fx.Dragger.EventType.END, function(evt) {
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evt.target = element;
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evt.type = 'dragend';
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target.triggerEvent(evt.type, evt);
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});
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};
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/** @inheritDoc */
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ol.event.Drag.prototype.destroy = function() {
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this.dragger_.dispose();
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};
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ol.event.addSequenceProvider('drag', ol.event.Drag); |