107 lines
2.8 KiB
JavaScript
107 lines
2.8 KiB
JavaScript
goog.provide('ol.control.ZoomToExtent');
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goog.require('goog.asserts');
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goog.require('goog.dom');
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goog.require('goog.dom.TagName');
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goog.require('goog.events');
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goog.require('goog.events.EventType');
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goog.require('ol.control.Control');
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goog.require('ol.css');
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goog.require('ol.pointer.PointerEventHandler');
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/**
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* @classdesc
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* A button control which, when pressed, changes the map view to a specific
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* extent. To style this control use the css selector `.ol-zoom-extent`.
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*
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* @constructor
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* @extends {ol.control.Control}
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* @param {olx.control.ZoomToExtentOptions=} opt_options Options.
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* @api stable
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*/
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ol.control.ZoomToExtent = function(opt_options) {
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var options = goog.isDef(opt_options) ? opt_options : {};
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/**
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* @type {ol.Extent}
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* @private
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*/
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this.extent_ = goog.isDef(options.extent) ? options.extent : null;
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var className = goog.isDef(options.className) ? options.className :
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'ol-zoom-extent';
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var tipLabel = goog.isDef(options.tipLabel) ?
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options.tipLabel : 'Fit to extent';
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var tip = goog.dom.createDom(goog.dom.TagName.SPAN, {
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'role' : 'tooltip'
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}, tipLabel);
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var button = goog.dom.createDom(goog.dom.TagName.BUTTON, {
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'class': 'ol-has-tooltip',
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'type': 'button'
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});
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goog.dom.appendChild(button, tip);
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var buttonHandler = new ol.pointer.PointerEventHandler(button);
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this.registerDisposable(buttonHandler);
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goog.events.listen(buttonHandler, ol.pointer.EventType.POINTERUP,
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this.handlePointerUp_, false, this);
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goog.events.listen(button, goog.events.EventType.CLICK,
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this.handleClick_, false, this);
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goog.events.listen(button, [
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goog.events.EventType.MOUSEOUT,
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goog.events.EventType.FOCUSOUT
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], function() {
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this.blur();
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}, false);
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var cssClasses = className + ' ' + ol.css.CLASS_UNSELECTABLE + ' ' +
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ol.css.CLASS_CONTROL;
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var element = goog.dom.createDom(goog.dom.TagName.DIV, cssClasses, button);
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goog.base(this, {
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element: element,
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target: options.target
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});
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};
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goog.inherits(ol.control.ZoomToExtent, ol.control.Control);
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/**
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* @param {goog.events.BrowserEvent} event The event to handle
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* @private
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*/
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ol.control.ZoomToExtent.prototype.handleClick_ = function(event) {
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if (event.screenX !== 0 && event.screenY !== 0) {
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return;
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}
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this.handleZoomToExtent_();
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};
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/**
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* @param {ol.pointer.PointerEvent} pointerEvent The event to handle
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* @private
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*/
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ol.control.ZoomToExtent.prototype.handlePointerUp_ = function(pointerEvent) {
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pointerEvent.browserEvent.preventDefault();
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this.handleZoomToExtent_();
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};
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/**
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* @private
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*/
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ol.control.ZoomToExtent.prototype.handleZoomToExtent_ = function() {
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var map = this.getMap();
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var view = map.getView();
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var extent = goog.isNull(this.extent_) ?
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view.getProjection().getExtent() : this.extent_;
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var size = map.getSize();
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goog.asserts.assert(goog.isDef(size));
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view.fitExtent(extent, size);
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};
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