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    <h1>
      <a href="../../index.html">all files</a> / <a href="index.html">ol/interaction/</a> dragboxinteraction.js
    </h1>
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        <span class="strong">55.1% </span>
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        <span class="strong">22.22% </span>
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<span class="cline-any cline-neutral">&nbsp;</span></td><td class="text"><pre class="prettyprint lang-js">// FIXME draw drag box
goog.provide('ol.DragBoxEvent');
goog.provide('ol.interaction.DragBox');
&nbsp;
goog.require('goog.events.Event');
goog.require('ol');
goog.require('ol.events.ConditionType');
goog.require('ol.events.condition');
goog.require('ol.interaction.Pointer');
goog.require('ol.render.Box');
&nbsp;
&nbsp;
/**
 * @const
 * @type {number}
 */
ol.DRAG_BOX_HYSTERESIS_PIXELS_SQUARED =
    ol.DRAG_BOX_HYSTERESIS_PIXELS *
    ol.DRAG_BOX_HYSTERESIS_PIXELS;
&nbsp;
&nbsp;
/**
 * @enum {string}
 */
ol.DragBoxEventType = {
  /**
   * Triggered upon drag box start.
   * @event ol.DragBoxEvent#boxstart
   * @api stable
   */
  BOXSTART: 'boxstart',
  /**
   * Triggered upon drag box end.
   * @event ol.DragBoxEvent#boxend
   * @api stable
   */
  BOXEND: 'boxend'
};
&nbsp;
&nbsp;
&nbsp;
/**
 * @classdesc
 * Events emitted by {@link ol.interaction.DragBox} instances are instances of
 * this type.
 *
 * @param {string} type The event type.
 * @param {ol.Coordinate} coordinate The event coordinate.
 * @extends {goog.events.Event}
 * @constructor
 * @implements {oli.DragBoxEvent}
 */
ol.DragBoxEvent = <span class="fstat-no" title="function not covered" >function(type, coordinate) {</span>
<span class="cstat-no" title="statement not covered" >  goog.base(this, type);</span>
&nbsp;
  /**
   * The coordinate of the drag event.
   * @const
   * @type {ol.Coordinate}
   * @api stable
   */
<span class="cstat-no" title="statement not covered" >  this.coordinate = coordinate;</span>
&nbsp;
};
goog.inherits(ol.DragBoxEvent, goog.events.Event);
&nbsp;
&nbsp;
&nbsp;
/**
 * @classdesc
 * Allows the user to draw a vector box by clicking and dragging on the map,
 * normally combined with an {@link ol.events.condition} that limits
 * it to when the shift or other key is held down. This is used, for example,
 * for zooming to a specific area of the map
 * (see {@link ol.interaction.DragZoom} and
 * {@link ol.interaction.DragRotateAndZoom}).
 *
 * This interaction is only supported for mouse devices.
 *
 * @constructor
 * @extends {ol.interaction.Pointer}
 * @fires ol.DragBoxEvent
 * @param {olx.interaction.DragBoxOptions=} opt_options Options.
 * @api stable
 */
ol.interaction.DragBox = function(opt_options) {
&nbsp;
  goog.base(this, {
    handleDownEvent: ol.interaction.DragBox.handleDownEvent_,
    handleDragEvent: ol.interaction.DragBox.handleDragEvent_,
    handleUpEvent: ol.interaction.DragBox.handleUpEvent_
  });
&nbsp;
  var options = opt_options ? opt_options : <span class="branch-1 cbranch-no" title="branch not covered" >{};</span>
&nbsp;
  /**
   * @type {ol.render.Box}
   * @private
   */
  this.box_ = new ol.render.Box(options.className || <span class="branch-1 cbranch-no" title="branch not covered" >'ol-dragbox')</span>;
&nbsp;
  /**
   * @type {ol.Pixel}
   * @private
   */
  this.startPixel_ = null;
&nbsp;
  /**
   * @private
   * @type {ol.events.ConditionType}
   */
  this.condition_ = options.condition ?
      options.condition : <span class="branch-1 cbranch-no" title="branch not covered" >ol.events.condition.always;</span>
&nbsp;
};
goog.inherits(ol.interaction.DragBox, ol.interaction.Pointer);
&nbsp;
&nbsp;
/**
 * @param {ol.MapBrowserPointerEvent} mapBrowserEvent Event.
 * @this {ol.interaction.DragBox}
 * @private
 */
ol.interaction.DragBox.handleDragEvent_ = <span class="fstat-no" title="function not covered" >function(mapBrowserEvent) {</span>
<span class="cstat-no" title="statement not covered" >  if (!ol.events.condition.mouseOnly(mapBrowserEvent)) {</span>
<span class="cstat-no" title="statement not covered" >    return;</span>
  }
&nbsp;
<span class="cstat-no" title="statement not covered" >  this.box_.setPixels(this.startPixel_, mapBrowserEvent.pixel);</span>
};
&nbsp;
&nbsp;
/**
 * Returns geometry of last drawn box.
 * @return {ol.geom.Polygon} Geometry.
 * @api stable
 */
ol.interaction.DragBox.prototype.getGeometry = function() {
  return this.box_.getGeometry();
};
&nbsp;
&nbsp;
/**
 * To be overriden by child classes.
 * FIXME: use constructor option instead of relying on overridding.
 * @param {ol.MapBrowserEvent} mapBrowserEvent Map browser event.
 * @protected
 */
ol.interaction.DragBox.prototype.onBoxEnd = ol.nullFunction;
&nbsp;
&nbsp;
/**
 * @param {ol.MapBrowserPointerEvent} mapBrowserEvent Event.
 * @return {boolean} Stop drag sequence?
 * @this {ol.interaction.DragBox}
 * @private
 */
ol.interaction.DragBox.handleUpEvent_ = <span class="fstat-no" title="function not covered" >function(mapBrowserEvent) {</span>
<span class="cstat-no" title="statement not covered" >  if (!ol.events.condition.mouseOnly(mapBrowserEvent)) {</span>
<span class="cstat-no" title="statement not covered" >    return true;</span>
  }
&nbsp;
<span class="cstat-no" title="statement not covered" >  this.box_.setMap(null);</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >  var deltaX = mapBrowserEvent.pixel[0] - this.startPixel_[0];</span>
<span class="cstat-no" title="statement not covered" >  var deltaY = mapBrowserEvent.pixel[1] - this.startPixel_[1];</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >  if (deltaX * deltaX + deltaY * deltaY &gt;=</span>
      ol.DRAG_BOX_HYSTERESIS_PIXELS_SQUARED) {
<span class="cstat-no" title="statement not covered" >    this.onBoxEnd(mapBrowserEvent);</span>
<span class="cstat-no" title="statement not covered" >    this.dispatchEvent(new ol.DragBoxEvent(ol.DragBoxEventType.BOXEND,</span>
        mapBrowserEvent.coordinate));
  }
<span class="cstat-no" title="statement not covered" >  return false;</span>
};
&nbsp;
&nbsp;
/**
 * @param {ol.MapBrowserPointerEvent} mapBrowserEvent Event.
 * @return {boolean} Start drag sequence?
 * @this {ol.interaction.DragBox}
 * @private
 */
ol.interaction.DragBox.handleDownEvent_ = function(mapBrowserEvent) {
  <span class="missing-if-branch" title="else path not taken" >E</span>if (!ol.events.condition.mouseOnly(mapBrowserEvent)) {
    return false;
  }
&nbsp;
<span class="cstat-no" title="statement not covered" >  var browserEvent = mapBrowserEvent.browserEvent;</span>
<span class="cstat-no" title="statement not covered" >  if (browserEvent.isMouseActionButton() &amp;&amp; this.condition_(mapBrowserEvent)) {</span>
<span class="cstat-no" title="statement not covered" >    this.startPixel_ = mapBrowserEvent.pixel;</span>
<span class="cstat-no" title="statement not covered" >    this.box_.setMap(mapBrowserEvent.map);</span>
<span class="cstat-no" title="statement not covered" >    this.box_.setPixels(this.startPixel_, this.startPixel_);</span>
<span class="cstat-no" title="statement not covered" >    this.dispatchEvent(new ol.DragBoxEvent(ol.DragBoxEventType.BOXSTART,</span>
        mapBrowserEvent.coordinate));
<span class="cstat-no" title="statement not covered" >    return true;</span>
  } else {
<span class="cstat-no" title="statement not covered" >    return false;</span>
  }
};
&nbsp;</pre></td></tr>
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