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zooming out option for ol.interaction.DragZoom

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drnextgis
2016-03-14 18:05:44 +06:00
parent 88701db4c4
commit 7b1e92580d
3 changed files with 52 additions and 1 deletions
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17
src/ol/interaction/dragzoominteraction.js
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@@ -34,6 +34,12 @@ ol.interaction.DragZoom = function(opt_options) {
*/
this.duration_ = options.duration !== undefined ? options.duration : 200;
/**
* @private
* @type {boolean}
*/
this.out_ = options.out !== undefined ? options.out : false;
goog.base(this, {
condition: condition,
className: options.className || 'ol-dragzoom'
@@ -57,6 +63,17 @@ ol.interaction.DragZoom.prototype.onBoxEnd = function() {
var extent = this.getGeometry().getExtent();
if (this.out_) {
var mapExtent = view.calculateExtent(size);
var boxPixelExtent = ol.extent.createOrUpdateFromCoordinates([
map.getPixelFromCoordinate(ol.extent.getBottomLeft(extent)),
map.getPixelFromCoordinate(ol.extent.getTopRight(extent))]);
var factor = view.getResolutionForExtent(boxPixelExtent, size);
ol.extent.scaleFromCenter(mapExtent, 1 / factor);
extent = mapExtent;
}
var resolution = view.constrainResolution(
view.getResolutionForExtent(extent, size));