map

infobox.js

/**
 * @name InfoBox
 * @version 1.1.13 [March 19, 2014]
 * @author Gary Little (inspired by proof-of-concept code from Pamela Fox of Google)
 * @copyright Copyright 2010 Gary Little [gary at luxcentral.com]
 * @fileoverview InfoBox extends the Google Maps JavaScript API V3 <tt>OverlayView</tt> class.
 *  <p>
 *  An InfoBox behaves like a <tt>google.maps.InfoWindow</tt>, but it supports several
 *  additional properties for advanced styling. An InfoBox can also be used as a map label.
 *  <p>
 *  An InfoBox also fires the same events as a <tt>google.maps.InfoWindow</tt>.
 */

/*!
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/*jslint browser:true */
/*global google */

/**
 * @name InfoBoxOptions
 * @class This class represents the optional parameter passed to the {@link InfoBox} constructor.
 * @property {string|Node} content The content of the InfoBox (plain text or an HTML DOM node).
 * @property {boolean} [disableAutoPan=false] Disable auto-pan on <tt>open</tt>.
 * @property {number} maxWidth The maximum width (in pixels) of the InfoBox. Set to 0 if no maximum.
 * @property {Size} pixelOffset The offset (in pixels) from the top left corner of the InfoBox
 *  (or the bottom left corner if the <code>alignBottom</code> property is <code>true</code>)
 *  to the map pixel corresponding to <tt>position</tt>.
 * @property {LatLng} position The geographic location at which to display the InfoBox.
 * @property {number} zIndex The CSS z-index style value for the InfoBox.
 *  Note: This value overrides a zIndex setting specified in the <tt>boxStyle</tt> property.
 * @property {string} [boxClass="infoBox"] The name of the CSS class defining the styles for the InfoBox container.
 * @property {Object} [boxStyle] An object literal whose properties define specific CSS
 *  style values to be applied to the InfoBox. Style values defined here override those that may
 *  be defined in the <code>boxClass</code> style sheet. If this property is changed after the
 *  InfoBox has been created, all previously set styles (except those defined in the style sheet)
 *  are removed from the InfoBox before the new style values are applied.
 * @property {string} closeBoxMargin The CSS margin style value for the close box.
 *  The default is "2px" (a 2-pixel margin on all sides).
 * @property {string} closeBoxURL The URL of the image representing the close box.
 *  Note: The default is the URL for Google's standard close box.
 *  Set this property to "" if no close box is required.
 * @property {Size} infoBoxClearance Minimum offset (in pixels) from the InfoBox to the
 *  map edge after an auto-pan.
 * @property {boolean} [isHidden=false] Hide the InfoBox on <tt>open</tt>.
 *  [Deprecated in favor of the <tt>visible</tt> property.]
 * @property {boolean} [visible=true] Show the InfoBox on <tt>open</tt>.
 * @property {boolean} alignBottom Align the bottom left corner of the InfoBox to the <code>position</code>
 *  location (default is <tt>false</tt> which means that the top left corner of the InfoBox is aligned).
 * @property {string} pane The pane where the InfoBox is to appear (default is "floatPane").
 *  Set the pane to "mapPane" if the InfoBox is being used as a map label.
 *  Valid pane names are the property names for the <tt>google.maps.MapPanes</tt> object.
 * @property {boolean} enableEventPropagation Propagate mousedown, mousemove, mouseover, mouseout,
 *  mouseup, click, dblclick, touchstart, touchend, touchmove, and contextmenu events in the InfoBox
 *  (default is <tt>false</tt> to mimic the behavior of a <tt>google.maps.InfoWindow</tt>). Set
 *  this property to <tt>true</tt> if the InfoBox is being used as a map label.
 */

/**
 * Creates an InfoBox with the options specified in {@link InfoBoxOptions}.
 *  Call <tt>InfoBox.open</tt> to add the box to the map.
 * @constructor
 * @param {InfoBoxOptions} [opt_opts]
 */
function InfoBox(opt_opts) {

  opt_opts = opt_opts || {};

  google.maps.OverlayView.apply(this, arguments);

  // Standard options (in common with google.maps.InfoWindow):
  //
  this.content_ = opt_opts.content || "";
  this.disableAutoPan_ = opt_opts.disableAutoPan || false;
  this.maxWidth_ = opt_opts.maxWidth || 0;
  this.pixelOffset_ = opt_opts.pixelOffset || new google.maps.Size(0, 0);
  this.position_ = opt_opts.position || new google.maps.LatLng(0, 0);
  this.zIndex_ = opt_opts.zIndex || null;

  // Additional options (unique to InfoBox):
  //
  this.boxClass_ = opt_opts.boxClass || "infoBox";
  this.boxStyle_ = opt_opts.boxStyle || {};
  this.closeBoxMargin_ = opt_opts.closeBoxMargin || "2px";
  this.closeBoxURL_ = opt_opts.closeBoxURL || "http://www.google.com/intl/en_us/mapfiles/close.gif";
  if (opt_opts.closeBoxURL === "") {
    this.closeBoxURL_ = "";
  }
  this.infoBoxClearance_ = opt_opts.infoBoxClearance || new google.maps.Size(1, 1);

  if (typeof opt_opts.visible === "undefined") {
    if (typeof opt_opts.isHidden === "undefined") {
      opt_opts.visible = true;
    } else {
      opt_opts.visible = !opt_opts.isHidden;
    }
  }
  this.isHidden_ = !opt_opts.visible;

  this.alignBottom_ = opt_opts.alignBottom || false;
  this.pane_ = opt_opts.pane || "floatPane";
  this.enableEventPropagation_ = opt_opts.enableEventPropagation || false;

  this.div_ = null;
  this.closeListener_ = null;
  this.moveListener_ = null;
  this.contextListener_ = null;
  this.eventListeners_ = null;
  this.fixedWidthSet_ = null;
}

/* InfoBox extends OverlayView in the Google Maps API v3.
*/
InfoBox.prototype = new google.maps.OverlayView();

/**
 * Creates the DIV representing the InfoBox.
 * @private
 */
InfoBox.prototype.createInfoBoxDiv_ = function () {

  var i;
  var events;
  var bw;
  var me = this;

  // This handler prevents an event in the InfoBox from being passed on to the map.
  //
  var cancelHandler = function (e) {
    e.cancelBubble = true;
    if (e.stopPropagation) {
      e.stopPropagation();
    }
  };

  // This handler ignores the current event in the InfoBox and conditionally prevents
  // the event from being passed on to the map. It is used for the contextmenu event.
  //
  var ignoreHandler = function (e) {

    e.returnValue = false;

    if (e.preventDefault) {

      e.preventDefault();
    }

    if (!me.enableEventPropagation_) {

      cancelHandler(e);
    }
  };

  if (!this.div_) {

    this.div_ = document.createElement("div");

    this.setBoxStyle_();

    if (typeof this.content_.nodeType === "undefined") {
      this.div_.innerHTML = this.getCloseBoxImg_() + this.content_;
    } else {
      this.div_.innerHTML = this.getCloseBoxImg_();
      this.div_.appendChild(this.content_);
    }

    // Add the InfoBox DIV to the DOM
    this.getPanes()[this.pane_].appendChild(this.div_);

    this.addClickHandler_();

    if (this.div_.style.width) {

      this.fixedWidthSet_ = true;

    } else {

      if (this.maxWidth_ !== 0 && this.div_.offsetWidth > this.maxWidth_) {

        this.div_.style.width = this.maxWidth_;
        this.div_.style.overflow = "auto";
        this.fixedWidthSet_ = true;

      } else { // The following code is needed to overcome problems with MSIE

        bw = this.getBoxWidths_();

        this.div_.style.width = (this.div_.offsetWidth - bw.left - bw.right) + "px";
        this.fixedWidthSet_ = false;
      }
    }

    this.panBox_(this.disableAutoPan_);

    if (!this.enableEventPropagation_) {

      this.eventListeners_ = [];

      // Cancel event propagation.
      //
      // Note: mousemove not included (to resolve Issue 152)
      events = ["mousedown", "mouseover", "mouseout", "mouseup",
        "click", "dblclick", "touchstart", "touchend", "touchmove"];

      for (i = 0; i < events.length; i++) {

        this.eventListeners_.push(google.maps.event.addDomListener(this.div_, events[i], cancelHandler));
      }

      // Workaround for Google bug that causes the cursor to change to a pointer
      // when the mouse moves over a marker underneath InfoBox.
      this.eventListeners_.push(google.maps.event.addDomListener(this.div_, "mouseover", function (e) {
        this.style.cursor = "default";
      }));
    }

    this.contextListener_ = google.maps.event.addDomListener(this.div_, "contextmenu", ignoreHandler);

    /**
     * This event is fired when the DIV containing the InfoBox's content is attached to the DOM.
     * @name InfoBox#domready
     * @event
     */
    google.maps.event.trigger(this, "domready");
  }
};

/**
 * Returns the HTML <IMG> tag for the close box.
 * @private
 */
InfoBox.prototype.getCloseBoxImg_ = function () {

  var img = "";

  if (this.closeBoxURL_ !== "") {

    img  = "<img";
    img += " src='" + this.closeBoxURL_ + "'";
    img += " align=right"; // Do this because Opera chokes on style='float: right;'
    img += " style='";
    img += " position: relative;"; // Required by MSIE
    img += " cursor: pointer;";
    img += " margin: " + this.closeBoxMargin_ + ";";
    img += "'>";
  }

  return img;
};

/**
 * Adds the click handler to the InfoBox close box.
 * @private
 */
InfoBox.prototype.addClickHandler_ = function () {

  var closeBox;

  if (this.closeBoxURL_ !== "") {

    closeBox = this.div_.firstChild;
    this.closeListener_ = google.maps.event.addDomListener(closeBox, "click", this.getCloseClickHandler_());

  } else {

    this.closeListener_ = null;
  }
};

/**
 * Returns the function to call when the user clicks the close box of an InfoBox.
 * @private
 */
InfoBox.prototype.getCloseClickHandler_ = function () {

  var me = this;

  return function (e) {

    // 1.0.3 fix: Always prevent propagation of a close box click to the map:
    e.cancelBubble = true;

    if (e.stopPropagation) {

      e.stopPropagation();
    }

    /**
     * This event is fired when the InfoBox's close box is clicked.
     * @name InfoBox#closeclick
     * @event
     */
    google.maps.event.trigger(me, "closeclick");

    me.close();
  };
};

/**
 * Pans the map so that the InfoBox appears entirely within the map's visible area.
 * @private
 */
InfoBox.prototype.panBox_ = function (disablePan) {

  var map;
  var bounds;
  var xOffset = 0, yOffset = 0;

  if (!disablePan) {

    map = this.getMap();

    if (map instanceof google.maps.Map) { // Only pan if attached to map, not panorama

      if (!map.getBounds().contains(this.position_)) {
        // Marker not in visible area of map, so set center
        // of map to the marker position first.
        map.setCenter(this.position_);
      }

      bounds = map.getBounds();

      var mapDiv = map.getDiv();
      var mapWidth = mapDiv.offsetWidth;
      var mapHeight = mapDiv.offsetHeight;
      var iwOffsetX = this.pixelOffset_.width;
      var iwOffsetY = this.pixelOffset_.height;
      var iwWidth = this.div_.offsetWidth;
      var iwHeight = this.div_.offsetHeight;
      var padX = this.infoBoxClearance_.width;
      var padY = this.infoBoxClearance_.height;
      var pixPosition = this.getProjection().fromLatLngToContainerPixel(this.position_);

      if (pixPosition.x < (-iwOffsetX + padX)) {
        xOffset = pixPosition.x + iwOffsetX - padX;
      } else if ((pixPosition.x + iwWidth + iwOffsetX + padX) > mapWidth) {
        xOffset = pixPosition.x + iwWidth + iwOffsetX + padX - mapWidth;
      }
      if (this.alignBottom_) {
        if (pixPosition.y < (-iwOffsetY + padY + iwHeight)) {
          yOffset = pixPosition.y + iwOffsetY - padY - iwHeight;
        } else if ((pixPosition.y + iwOffsetY + padY) > mapHeight) {
          yOffset = pixPosition.y + iwOffsetY + padY - mapHeight;
        }
      } else {
        if (pixPosition.y < (-iwOffsetY + padY)) {
          yOffset = pixPosition.y + iwOffsetY - padY;
        } else if ((pixPosition.y + iwHeight + iwOffsetY + padY) > mapHeight) {
          yOffset = pixPosition.y + iwHeight + iwOffsetY + padY - mapHeight;
        }
      }

      if (!(xOffset === 0 && yOffset === 0)) {

        // Move the map to the shifted center.
        //
        var c = map.getCenter();
        map.panBy(xOffset, yOffset);
      }
    }
  }
};

/**
 * Sets the style of the InfoBox by setting the style sheet and applying
 * other specific styles requested.
 * @private
 */
InfoBox.prototype.setBoxStyle_ = function () {

  var i, boxStyle;

  if (this.div_) {

    // Apply style values from the style sheet defined in the boxClass parameter:
    this.div_.className = this.boxClass_;

    // Clear existing inline style values:
    this.div_.style.cssText = "";

    // Apply style values defined in the boxStyle parameter:
    boxStyle = this.boxStyle_;
    for (i in boxStyle) {

      if (boxStyle.hasOwnProperty(i)) {

        this.div_.style[i] = boxStyle[i];
      }
    }

    // Fix for iOS disappearing InfoBox problem.
    // See http://stackoverflow.com/questions/9229535/google-maps-markers-disappear-at-certain-zoom-level-only-on-iphone-ipad
    this.div_.style.WebkitTransform = "translateZ(0)";

    // Fix up opacity style for benefit of MSIE:
    //
    if (typeof this.div_.style.opacity !== "undefined" && this.div_.style.opacity !== "") {
      // See http://www.quirksmode.org/css/opacity.html
      this.div_.style.MsFilter = "\"progid:DXImageTransform.Microsoft.Alpha(Opacity=" + (this.div_.style.opacity * 100) + ")\"";
      this.div_.style.filter = "alpha(opacity=" + (this.div_.style.opacity * 100) + ")";
    }

    // Apply required styles:
    //
    this.div_.style.position = "absolute";
    this.div_.style.visibility = 'hidden';
    if (this.zIndex_ !== null) {

      this.div_.style.zIndex = this.zIndex_;
    }
  }
};

/**
 * Get the widths of the borders of the InfoBox.
 * @private
 * @return {Object} widths object (top, bottom left, right)
 */
InfoBox.prototype.getBoxWidths_ = function () {

  var computedStyle;
  var bw = {top: 0, bottom: 0, left: 0, right: 0};
  var box = this.div_;

  if (document.defaultView && document.defaultView.getComputedStyle) {

    computedStyle = box.ownerDocument.defaultView.getComputedStyle(box, "");

    if (computedStyle) {

      // The computed styles are always in pixel units (good!)
      bw.top = parseInt(computedStyle.borderTopWidth, 10) || 0;
      bw.bottom = parseInt(computedStyle.borderBottomWidth, 10) || 0;
      bw.left = parseInt(computedStyle.borderLeftWidth, 10) || 0;
      bw.right = parseInt(computedStyle.borderRightWidth, 10) || 0;
    }

  } else if (document.documentElement.currentStyle) { // MSIE

    if (box.currentStyle) {

      // The current styles may not be in pixel units, but assume they are (bad!)
      bw.top = parseInt(box.currentStyle.borderTopWidth, 10) || 0;
      bw.bottom = parseInt(box.currentStyle.borderBottomWidth, 10) || 0;
      bw.left = parseInt(box.currentStyle.borderLeftWidth, 10) || 0;
      bw.right = parseInt(box.currentStyle.borderRightWidth, 10) || 0;
    }
  }

  return bw;
};

/**
 * Invoked when <tt>close</tt> is called. Do not call it directly.
 */
InfoBox.prototype.onRemove = function () {

  if (this.div_) {

    this.div_.parentNode.removeChild(this.div_);
    this.div_ = null;
  }
};

/**
 * Draws the InfoBox based on the current map projection and zoom level.
 */
InfoBox.prototype.draw = function () {

  this.createInfoBoxDiv_();

  var pixPosition = this.getProjection().fromLatLngToDivPixel(this.position_);

  this.div_.style.left = (pixPosition.x + this.pixelOffset_.width) + "px";

  if (this.alignBottom_) {
    this.div_.style.bottom = -(pixPosition.y + this.pixelOffset_.height) + "px";
  } else {
    this.div_.style.top = (pixPosition.y + this.pixelOffset_.height) + "px";
  }

  if (this.isHidden_) {

    this.div_.style.visibility = "hidden";

  } else {

    this.div_.style.visibility = "visible";
  }
};

/**
 * Sets the options for the InfoBox. Note that changes to the <tt>maxWidth</tt>,
 *  <tt>closeBoxMargin</tt>, <tt>closeBoxURL</tt>, and <tt>enableEventPropagation</tt>
 *  properties have no affect until the current InfoBox is <tt>close</tt>d and a new one
 *  is <tt>open</tt>ed.
 * @param {InfoBoxOptions} opt_opts
 */
InfoBox.prototype.setOptions = function (opt_opts) {
  if (typeof opt_opts.boxClass !== "undefined") { // Must be first

    this.boxClass_ = opt_opts.boxClass;
    this.setBoxStyle_();
  }
  if (typeof opt_opts.boxStyle !== "undefined") { // Must be second

    this.boxStyle_ = opt_opts.boxStyle;
    this.setBoxStyle_();
  }
  if (typeof opt_opts.content !== "undefined") {

    this.setContent(opt_opts.content);
  }
  if (typeof opt_opts.disableAutoPan !== "undefined") {

    this.disableAutoPan_ = opt_opts.disableAutoPan;
  }
  if (typeof opt_opts.maxWidth !== "undefined") {

    this.maxWidth_ = opt_opts.maxWidth;
  }
  if (typeof opt_opts.pixelOffset !== "undefined") {

    this.pixelOffset_ = opt_opts.pixelOffset;
  }
  if (typeof opt_opts.alignBottom !== "undefined") {

    this.alignBottom_ = opt_opts.alignBottom;
  }
  if (typeof opt_opts.position !== "undefined") {

    this.setPosition(opt_opts.position);
  }
  if (typeof opt_opts.zIndex !== "undefined") {

    this.setZIndex(opt_opts.zIndex);
  }
  if (typeof opt_opts.closeBoxMargin !== "undefined") {

    this.closeBoxMargin_ = opt_opts.closeBoxMargin;
  }
  if (typeof opt_opts.closeBoxURL !== "undefined") {

    this.closeBoxURL_ = opt_opts.closeBoxURL;
  }
  if (typeof opt_opts.infoBoxClearance !== "undefined") {

    this.infoBoxClearance_ = opt_opts.infoBoxClearance;
  }
  if (typeof opt_opts.isHidden !== "undefined") {

    this.isHidden_ = opt_opts.isHidden;
  }
  if (typeof opt_opts.visible !== "undefined") {

    this.isHidden_ = !opt_opts.visible;
  }
  if (typeof opt_opts.enableEventPropagation !== "undefined") {

    this.enableEventPropagation_ = opt_opts.enableEventPropagation;
  }

  if (this.div_) {

    this.draw();
  }
};

/**
 * Sets the content of the InfoBox.
 *  The content can be plain text or an HTML DOM node.
 * @param {string|Node} content
 */
InfoBox.prototype.setContent = function (content) {
  this.content_ = content;

  if (this.div_) {

    if (this.closeListener_) {

      google.maps.event.removeListener(this.closeListener_);
      this.closeListener_ = null;
    }

    // Odd code required to make things work with MSIE.
    //
    if (!this.fixedWidthSet_) {

      this.div_.style.width = "";
    }

    if (typeof content.nodeType === "undefined") {
      this.div_.innerHTML = this.getCloseBoxImg_() + content;
    } else {
      this.div_.innerHTML = this.getCloseBoxImg_();
      this.div_.appendChild(content);
    }

    // Perverse code required to make things work with MSIE.
    // (Ensures the close box does, in fact, float to the right.)
    //
    if (!this.fixedWidthSet_) {
      this.div_.style.width = this.div_.offsetWidth + "px";
      if (typeof content.nodeType === "undefined") {
        this.div_.innerHTML = this.getCloseBoxImg_() + content;
      } else {
        this.div_.innerHTML = this.getCloseBoxImg_();
        this.div_.appendChild(content);
      }
    }

    this.addClickHandler_();
  }

  /**
   * This event is fired when the content of the InfoBox changes.
   * @name InfoBox#content_changed
   * @event
   */
  google.maps.event.trigger(this, "content_changed");
};

/**
 * Sets the geographic location of the InfoBox.
 * @param {LatLng} latlng
 */
InfoBox.prototype.setPosition = function (latlng) {

  this.position_ = latlng;

  if (this.div_) {

    this.draw();
  }

  /**
   * This event is fired when the position of the InfoBox changes.
   * @name InfoBox#position_changed
   * @event
   */
  google.maps.event.trigger(this, "position_changed");
};

/**
 * Sets the zIndex style for the InfoBox.
 * @param {number} index
 */
InfoBox.prototype.setZIndex = function (index) {

  this.zIndex_ = index;

  if (this.div_) {

    this.div_.style.zIndex = index;
  }

  /**
   * This event is fired when the zIndex of the InfoBox changes.
   * @name InfoBox#zindex_changed
   * @event
   */
  google.maps.event.trigger(this, "zindex_changed");
};

/**
 * Sets the visibility of the InfoBox.
 * @param {boolean} isVisible
 */
InfoBox.prototype.setVisible = function (isVisible) {

  this.isHidden_ = !isVisible;
  if (this.div_) {
    this.div_.style.visibility = (this.isHidden_ ? "hidden" : "visible");
  }
};

/**
 * Returns the content of the InfoBox.
 * @returns {string}
 */
InfoBox.prototype.getContent = function () {

  return this.content_;
};

/**
 * Returns the geographic location of the InfoBox.
 * @returns {LatLng}
 */
InfoBox.prototype.getPosition = function () {

  return this.position_;
};

/**
 * Returns the zIndex for the InfoBox.
 * @returns {number}
 */
InfoBox.prototype.getZIndex = function () {

  return this.zIndex_;
};

/**
 * Returns a flag indicating whether the InfoBox is visible.
 * @returns {boolean}
 */
InfoBox.prototype.getVisible = function () {

  var isVisible;

  if ((typeof this.getMap() === "undefined") || (this.getMap() === null)) {
    isVisible = false;
  } else {
    isVisible = !this.isHidden_;
  }
  return isVisible;
};

/**
 * Shows the InfoBox. [Deprecated; use <tt>setVisible</tt> instead.]
 */
InfoBox.prototype.show = function () {

  this.isHidden_ = false;
  if (this.div_) {
    this.div_.style.visibility = "visible";
  }
};

/**
 * Hides the InfoBox. [Deprecated; use <tt>setVisible</tt> instead.]
 */
InfoBox.prototype.hide = function () {

  this.isHidden_ = true;
  if (this.div_) {
    this.div_.style.visibility = "hidden";
  }
};

/**
 * Adds the InfoBox to the specified map or Street View panorama. If <tt>anchor</tt>
 *  (usually a <tt>google.maps.Marker</tt>) is specified, the position
 *  of the InfoBox is set to the position of the <tt>anchor</tt>. If the
 *  anchor is dragged to a new location, the InfoBox moves as well.
 * @param {Map|StreetViewPanorama} map
 * @param {MVCObject} [anchor]
 */
InfoBox.prototype.open = function (map, anchor) {

  var me = this;

  if (anchor) {

    this.position_ = anchor.getPosition();
    this.moveListener_ = google.maps.event.addListener(anchor, "position_changed", function () {
      me.setPosition(this.getPosition());
    });
  }

  this.setMap(map);

  if (this.div_) {

    this.panBox_();
  }
};

/**
 * Removes the InfoBox from the map.
 */
InfoBox.prototype.close = function () {

  var i;

  if (this.closeListener_) {

    google.maps.event.removeListener(this.closeListener_);
    this.closeListener_ = null;
  }

  if (this.eventListeners_) {

    for (i = 0; i < this.eventListeners_.length; i++) {

      google.maps.event.removeListener(this.eventListeners_[i]);
    }
    this.eventListeners_ = null;
  }

  if (this.moveListener_) {

    google.maps.event.removeListener(this.moveListener_);
    this.moveListener_ = null;
  }

  if (this.contextListener_) {

    google.maps.event.removeListener(this.contextListener_);
    this.contextListener_ = null;
  }

  this.setMap(null);
};

map.js

// https://community.filemaker.com/thread/146501
window.$ = window.jQuery;
var openFlag = false;
var mapLists = $("#sideContainer li a");
var infoWindow;

var $active = '.is-active';

var gMap = {
  map: null,
  mapContainer: document.getElementById('mapContainer'),
  sideContainer: document.getElementById('sideContainer'),
  generateLink: document.getElementById('generateLink'),
  markers: [],
  visibleInfoWindow: null,

  datasCount: mapLists.length,

  generateTriggerCallback: function(object, eventType) {
    return function() {
      google.maps.event.trigger(object, eventType);
    };
  },

  zoomopenInfoWindow: function(marker,id,item) {
    return function() {

      gMap.map.setOptions({
        draggable: true,
        scrollwheel: true
      });
      openFlag = true;

      if ($($active).length > 0) {
        $($active).removeClass($active);
      }

      marker.setAnimation(google.maps.Animation.BOUNCE);

      setTimeout(function(){
        marker.setAnimation(null);
      },750);

      $(item).addClass($active);
      if (infoWindow) {
        infoWindow.close();
        openFlag = false;
      }

      $.ajax({
        url: '/wp-json/wp/v2/posts/' + id,
        success: function(data){

          infoWindow = new InfoBox({
            content: [
              '<div class="map-content">',
                '<div class="map-main">',
                  '<div>',
                    '<h1>'+data["title"]["rendered"]+'</h1>',
                    data["content"]["rendered"],
                  '</div>',
                '</div>',
              '</div>'
            ].join(''),
            pixelOffset: new google.maps.Size(-(610/2), -window.innerHeight),
            // closeBoxURL:"/close.png",
            enableEventPropagation: true
          });

          infoWindow.open(gMap.map, marker);

        }
      });

    };
  },

  clearMarkers: function() {
    for (var i = 0, marker; marker = gMap.markers[i]; i++) {
      marker.setVisible(false);
    }
  },
  generateMultiMarkers: function(center) {
    // Populate side bar.
    var avg = {
      lat: 0,
      lng: 0
    };
    var ul = gMap.sideContainer;

    // Clear list and map markers.
    gMap.clearMarkers();

    for (var i = 0; i < gMap.datasCount; i++) {

      var item = $(mapLists).eq(i);

      // Place markers on map.
      var randLatLng = new google.maps.LatLng(
        Number(item.attr("data-lat")),
        Number(item.attr("data-lng")));
      var marker = new google.maps.Marker({
        map: gMap.map,
        position: randLatLng
        // icon:"/dist/icon03.png"
      });
      gMap.markers.push(marker);
      // Create marker info window.

      var id = item.attr("data-post");

      // Add marker click & dblclick event listener.
      google.maps.event.addListener(marker, 'mousedown', gMap.zoomopenInfoWindow(marker,id,item));
      //google.maps.event.addListener(marker, 'dblclick', gMap.zoomopenInfoWindow(marker,id,item));

      // Sum up all lat/lng to calculate center all points.
      $(item).on('click', gMap.generateTriggerCallback(marker, 'mousedown'));
      avg.lat += randLatLng.lat();
      avg.lng += randLatLng.lng();
    }
    // Center and Zoom map.
    gMap.map.setCenter(new google.maps.LatLng(
      avg.lat / gMap.datasCount, avg.lng / gMap.datasCount)
    );
    gMap.map.setZoom(12)
  },

  init: function() {
    gMap.map = new google.maps.Map(gMap.mapContainer, {
      mapTypeControl: true,
      mapTypeControlOptions: {style: google.maps.MapTypeControlStyle.DROPDOWN_MENU},
      navigationControl: true,
      navigationControlOptions: {style: google.maps.NavigationControlStyle.SMALL},
      streetViewControl: false,
      mapTypeId:google.maps.MapTypeId.ROADMAP,
      disableDefaultUI: true
    });
    // Add onclick handler to generate link.
    google.maps.event.addDomListener(gMap.generateLink, 'click', function() {
      gMap.generateMultiMarkers(gMap.map.getCenter());
      // Close the last selected marker.
      if (gMap.visibleInfoWindow) {
        gMap.visibleInfoWindow.close();
      }
    });
    // Generate markers against map center.
    google.maps.event.trigger(gMap.generateLink, 'click');
  }
};
google.maps.event.addDomListener(window, 'load', gMap.init, gMap);

google.maps.event.addDomListener(document.querySelector(".map-minus"), 'mousedown', function() {
  if (gMap.map.getZoom() == 7) {

  }else {
    gMap.map.setZoom(gMap.map.getZoom() - 1);
  }

});
google.maps.event.addDomListener(document.querySelector(".map-plus"), 'mousedown', function() {
  if (gMap.map.getZoom() == 15) {

  }else {
    gMap.map.setZoom(gMap.map.getZoom() + 1);
  }

});

map.php

<?php
/*
   Template Name: 地図ページ
 */
?>

<?php get_header(); ?>
<style>
.map_container {
  position: fixed;
  width: 100%;
  height: 100%;
  top:0;
  left:0;
  z-index: 999;
}

#sideContainer {
  z-index: 99;
  list-style-type: none;
  padding: 0;
  margin: 0;
  position: absolute;
  right: 0;
  height: calc(100%);
  background-color: #fcfcfc;
  overflow-x: hidden;
  overflow-y: auto;
  width: 310px;
  background: #954848;
  color: #fff;
  padding: 20px 30px 30px;
}

#sideContainer li {
  font-size: 1em;
  list-style: none;
  padding: 5px 5px 5px 5px;
}
#sideContainer li ul {
  padding: 6px 0 6px 20px;
}

#mapContainer {
  position: absolute;
  width: calc(100% - 310px);
  height: calc(100%);
}

#generateLink {
  background-color: #fff;
  border: 2px ridge #000;
  color: #00c;
  cursor: pointer;
  font-size: 0.6em;
  font-weight: bold;
  left: 300px;
  padding: 1px 2px;
  position: absolute;
  text-align: center;
  text-decoration: underline;
  width: 100px;
  z-index: 1000;
}

.infoBox {
  height: 50vh;
  width: 50vw;
  background: #fff;
  border: 1px solid lightgray;
  box-shadow: 1px 1px 3px #ccc;
  border-radius: 5px;
  font-size: 16px;
  position: relative;
}
.infoBox:before {
  content: "";
  width: 57px;
  height: 45px;
  left: 50%;
  margin-left: -28.5px;
  background-size: contain;
  background-repeat: no-repeat;
  position: absolute;
  bottom: -42px;
}
.infoBox:after {
  content: "";
  width: 57px;
  height: 2px;
  left: 50%;
  margin-left: -28.5px;
  background: #fff;
  position: absolute;
  bottom: 0px;
}
.infoBox > img {
  margin-top: 23px !important;
  margin-right: 23px !important;
  width: 54px;
  height: 54px;
}
.infoBox .map-main {
  padding: 34px 43px 28px;
  height: 350px;
}
.infoBox .map-main div {
  height: 100%;
  overflow: auto;
  padding-right: 25px;
}
.infoBox .map-main div time {
  color: #8493A8;
}
.infoBox .map-main div h2 {
  margin: 10px 0;
  color: #3D4D65;
  font-size: 33px;
}
.infoBox .map-main div h3 {
  margin: 10px 0;
  color: #D0021B;
  font-size: 22px;
}
.infoBox .map-main div p {
  color: #54657E;
  line-height: 1.6;
}


#mapController {
  position: absolute;
  top: 780px;
  right: 352px;
}
#mapController .map-plus {
  margin-bottom: 4px;
}
#mapController .map-plus img {
  display: block;
}
#mapController .map-minus img {
  display: block;
}

</style>

<h1>固定ページの新規テンプレートです。</h1>
<div class="map_container">


  <div id="generateLink" style="display: none;">初期値リセット</div>
  <div id="mapContainer"></div>
  <div id="mapController">
    <div class="map-plus">拡大</div>
    <div class="map-minus">縮小</div>
  </div>

  <ul id="sideContainer">
  <?php
  $the_query = new WP_Query();
  $args = array(
    'post_type' => 'post',
    'posts_per_page' => -1
  );
  $the_query->query($args);
  if($the_query->have_posts()): while($the_query->have_posts()) : $the_query->the_post();
  ?>
  <li><a href="#" data-lat="<?php echo post_custom('lat'); ?>" data-lng="<?php echo post_custom('lng'); ?>" data-post="<?php the_ID(); ?>"><?php the_title(); ?></a></li>
  <?php endwhile; endif; ?>
  </ul>

</div>
<script src="http://maps.google.com/maps/api/js?key=AIzaSyASskNfli97ztp2tjVePvVQdOJlU0s3n5Q"></script>
<script src="<?php echo get_template_directory_uri()."/infobox.js";?>"></script>
<script src="<?php echo get_template_directory_uri()."/map.js";?>"></script>
<?php get_footer(); ?>