66 lines
1.7 KiB
JavaScript
66 lines
1.7 KiB
JavaScript
goog.provide('ol.interaction.DragZoom');
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goog.require('goog.asserts');
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goog.require('ol');
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goog.require('ol.events.condition');
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goog.require('ol.extent');
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goog.require('ol.interaction.DragBox');
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goog.require('ol.interaction.Interaction');
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goog.require('ol.style.Stroke');
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goog.require('ol.style.Style');
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/**
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* @classdesc
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* Allows the user to zoom the map by clicking and dragging on the map,
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* normally combined with an {@link ol.events.condition} that limits
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* it to when a key, shift by default, is held down.
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*
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* @constructor
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* @extends {ol.interaction.DragBox}
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* @param {olx.interaction.DragZoomOptions=} opt_options Options.
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* @api stable
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*/
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ol.interaction.DragZoom = function(opt_options) {
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var options = goog.isDef(opt_options) ? opt_options : {};
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var condition = goog.isDef(options.condition) ?
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options.condition : ol.events.condition.shiftKeyOnly;
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/**
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* @private
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* @type {ol.style.Style}
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*/
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var style = goog.isDef(options.style) ?
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options.style : new ol.style.Style({
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stroke: new ol.style.Stroke({
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color: [0, 0, 255, 1]
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})
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});
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goog.base(this, {
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condition: condition,
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style: style
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});
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};
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goog.inherits(ol.interaction.DragZoom, ol.interaction.DragBox);
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/**
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* @inheritDoc
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*/
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ol.interaction.DragZoom.prototype.onBoxEnd = function() {
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var map = this.getMap();
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var view = map.getView();
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goog.asserts.assert(goog.isDef(view));
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var extent = this.getGeometry().getExtent();
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var center = ol.extent.getCenter(extent);
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var size = map.getSize();
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goog.asserts.assert(goog.isDef(size));
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ol.interaction.Interaction.zoom(map, view,
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view.getResolutionForExtent(extent, size),
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center, ol.DRAGZOOM_ANIMATION_DURATION);
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};
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