FM / src

/home/desid573/phewl.desidrivers.com.au/v3-utility-library-master/keydragzoom/src/

/home/desid573/phewl.desidrivers.com.au/v3-utility-library-master/keydragzoom/src

Name	Size	Mode	Actions
keydragzoom.js	37949	0644	edit dl rm
keydragzoom_packed.js	14324	0644	edit dl rm

Edit: /home/desid573/phewl.desidrivers.com.au/v3-utility-library-master/keydragzoom/src/keydragzoom.js (37949B)

/**
 * @name KeyDragZoom for V3
 * @version 2.0.13 [February 17, 2018]
 * @author: Nianwei Liu [nianwei at gmail dot com] & Gary Little [gary at luxcentral dot com]
 * @fileoverview This library adds a drag zoom capability to a V3 Google map.
 * When drag zoom is enabled, holding down a designated hot key <code>(shift | ctrl | alt)</code>
 * while dragging a box around an area of interest will zoom the map in to that area when
 * the mouse button is released. Optionally, a visual control can also be supplied for turning
 * a drag zoom operation on and off.
 * Only one line of code is needed: <code>google.maps.Map.enableKeyDragZoom();</code>
 * 
 * NOTE: Do not use Ctrl as the hot key with Google Maps JavaScript API V3 since, unlike with V2,
 * it causes a context menu to appear when running on the Macintosh.
 * 
 * Note that if the map's container has a border around it, the border widths must be specified
 * in pixel units (or as thin, medium, or thick). This is required because of an MSIE limitation.
 * NL: 2009-05-28: initial port to core API V3.
 * NL: 2009-11-02: added a temp fix for -moz-transform for FF3.5.x using code from Paul Kulchenko (http://notebook.kulchenko.com/maps/gridmove).
 * NL: 2010-02-02: added a fix for IE flickering on divs onmousemove, caused by scroll value when get mouse position.
 * GL: 2010-06-15: added a visual control option.
 */
/*!
 *
 * 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.
 */
(function () {
 /*jslint browser:true */
 /*global window,google */
 /* Utility functions use "var funName=function()" syntax to allow use of the */
 /* Dean Edwards Packer compression tool (with Shrink variables, without Base62 encode). */

/**
   * Converts "thin", "medium", and "thick" to pixel widths
   * in an MSIE environment. Not called for other browsers
   * because getComputedStyle() returns pixel widths automatically.
   * @param {string} widthValue The value of the border width parameter.
   */
  var toPixels = function (widthValue) {
    var px;
    switch (widthValue) {
    case "thin":
      px = "2px";
      break;
    case "medium":
      px = "4px";
      break;
    case "thick":
      px = "6px";
      break;
    default:
      px = widthValue;
    }
    return px;
  };
 /**
  * Get the widths of the borders of an HTML element.
  *
  * @param {Node} h  The HTML element.
  * @return {Object} The width object {top, bottom left, right}.
  */
  var getBorderWidths = function (h) {
    var computedStyle;
    var bw = {};
    if (document.defaultView && document.defaultView.getComputedStyle) {
      computedStyle = h.ownerDocument.defaultView.getComputedStyle(h, "");
      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;
        return bw;
      }
    } else if (document.documentElement.currentStyle) { // MSIE
      if (h.currentStyle) {
        // The current styles may not be in pixel units so try to convert (bad!)
        bw.top = parseInt(toPixels(h.currentStyle.borderTopWidth), 10) || 0;
        bw.bottom = parseInt(toPixels(h.currentStyle.borderBottomWidth), 10) || 0;
        bw.left = parseInt(toPixels(h.currentStyle.borderLeftWidth), 10) || 0;
        bw.right = parseInt(toPixels(h.currentStyle.borderRightWidth), 10) || 0;
        return bw;
      }
    }
    // Shouldn't get this far for any modern browser
    bw.top = parseInt(h.style["border-top-width"], 10) || 0;
    bw.bottom = parseInt(h.style["border-bottom-width"], 10) || 0;
    bw.left = parseInt(h.style["border-left-width"], 10) || 0;
    bw.right = parseInt(h.style["border-right-width"], 10) || 0;
    return bw;
  };

// Page scroll values for use by getMousePosition. To prevent flickering on MSIE
  // they are calculated only when the document actually scrolls, not every time the
  // mouse moves (as they would be if they were calculated inside getMousePosition).
  var scroll = {
    x: 0,
    y: 0
  };
  var getScrollValue = function (e) {
    scroll.x = (typeof document.documentElement.scrollLeft !== "undefined" ? document.documentElement.scrollLeft : document.body.scrollLeft);
    scroll.y = (typeof document.documentElement.scrollTop !== "undefined" ? document.documentElement.scrollTop : document.body.scrollTop);
  };
  getScrollValue();

/**
 * Get the position of the mouse relative to the document.
 * @param {Event} e The mouse event.
 * @return {Object} The position object {left, top}.
 */
 var getMousePosition = function (e) {
 var posX = 0, posY = 0;
 e = e || window.event;
 if (typeof e.pageX !== "undefined") {
 posX = e.pageX;
 posY = e.pageY;
 } else if (typeof e.clientX !== "undefined") { // MSIE
 posX = e.clientX + scroll.x;
 posY = e.clientY + scroll.y;
 }
 return {
 left: posX,
 top: posY
 };
 };
 /**
 * Get the position of an HTML element relative to the document.
 * @param {Node} h The HTML element.
 * @return {Object} The position object {left, top}.
 */
 var getElementPosition = function (h) {
 var posX = h.offsetLeft;
 var posY = h.offsetTop;
 var parent = h.offsetParent;
 // Add offsets for all ancestors in the hierarchy
 while (parent !== null) {
 // Adjust for scrolling elements which may affect the map position.
 //
 // See http://www.howtocreate.co.uk/tutorials/javascript/browserspecific
 //
 // "...make sure that every element [on a Web page] with an overflow
 // of anything other than visible also has a position style set to
 // something other than the default static..."
 if (parent !== document.body && parent !== document.documentElement) {
 posX -= parent.scrollLeft;
 posY -= parent.scrollTop;
 }
 // See http://groups.google.com/group/google-maps-js-api-v3/browse_thread/thread/4cb86c0c1037a5e5
 // Example: http://notebook.kulchenko.com/maps/gridmove
 var m = parent;
 // This is the "normal" way to get offset information:
 var moffx = m.offsetLeft;
 var moffy = m.offsetTop;
 // This covers those cases where a transform is used:
 if (!moffx && !moffy && window.getComputedStyle) {
 var matrix = document.defaultView.getComputedStyle(m, null).MozTransform ||
 document.defaultView.getComputedStyle(m, null).WebkitTransform;
 if (matrix) {
 if (typeof matrix === "string") {
 var parms = matrix.split(",");
 moffx += parseInt(parms[4], 10) || 0;
 moffy += parseInt(parms[5], 10) || 0;
 }
 }
 }
 posX += moffx;
 posY += moffy;
 parent = parent.offsetParent;
 }
 return {
 left: posX,
 top: posY
 };
 };
 /**
 * Set the properties of an object to those from another object.
 * @param {Object} obj The target object.
 * @param {Object} vals The source object.
 */
 var setVals = function (obj, vals) {
 if (obj && vals) {
 for (var x in vals) {
 if (vals.hasOwnProperty(x)) {
 obj[x] = vals[x];
 }
 }
 }
 return obj;
 };
 /**
 * Set the opacity. If op is not passed in, this function just performs an MSIE fix.
 * @param {Node} h The HTML element.
 * @param {number} op The opacity value (0-1).
 */
 var setOpacity = function (h, op) {
 if (typeof op !== "undefined") {
 h.style.opacity = op;
 }
 if (typeof h.style.opacity !== "undefined" && h.style.opacity !== "") {
 h.style.filter = "alpha(opacity=" + (h.style.opacity * 100) + ")";
 }
 };
 /**
 * @name KeyDragZoomOptions
 * @class This class represents the optional parameter passed into <code>google.maps.Map.enableKeyDragZoom</code>.
 * @property {string} [key="shift"] The hot key to hold down to activate a drag zoom, <code>shift | ctrl | alt</code>.
 * NOTE: Do not use Ctrl as the hot key with Google Maps JavaScript API V3 since, unlike with V2,
 * it causes a context menu to appear when running on the Macintosh. Also note that the
 * <code>alt</code> hot key refers to the Option key on a Macintosh.
 * @property {Object} [boxStyle={border: "4px solid #736AFF"}]
 * An object literal defining the CSS styles of the zoom box.
 * Border widths must be specified in pixel units (or as thin, medium, or thick).
 * @property {Object} [veilStyle={backgroundColor: "gray", opacity: 0.25, cursor: "crosshair"}]
 * An object literal defining the CSS styles of the veil pane which covers the map when a drag
 * zoom is activated. The previous name for this property was <code>paneStyle</code> but the use
 * of this name is now deprecated.
 * @property {boolean} [noZoom=false] A flag indicating whether to disable zooming after an area is
 * selected. Set this to <code>true</code> to allow KeyDragZoom to be used as a simple area
 * selection tool.
 * @property {boolean} [visualEnabled=false] A flag indicating whether a visual control is to be used.
 * @property {string} [visualClass=""] The name of the CSS class defining the styles for the visual
 * control. To prevent the visual control from being printed, set this property to the name of
 * a class, defined inside a <code>@media print</code> rule, which sets the CSS
 * <code>display</code> style to <code>none</code>.
 * @property {ControlPosition} [visualPosition=google.maps.ControlPosition.LEFT_TOP]
 * The position of the visual control.
 * @property {Size} [visualPositionOffset=google.maps.Size(35, 0)] The width and height values
 * provided by this property are the offsets (in pixels) from the location at which the control
 * would normally be drawn to the desired drawing location.
 * @property {number} [visualPositionIndex=null] The index of the visual control.
 * The index is for controlling the placement of the control relative to other controls at the
 * position given by <code>visualPosition</code>; controls with a lower index are placed first.
 * Use a negative value to place the control before any default controls. No index is
 * generally required.
 * @property {String} [visualSprite="//maps.gstatic.com/mapfiles/ftr/controls/dragzoom_btn.png"]
 * The URL of the sprite image used for showing the visual control in the on, off, and hot
 * (i.e., when the mouse is over the control) states. The three images within the sprite must
 * be the same size and arranged in on-hot-off order in a single row with no spaces between images.
 * @property {Size} [visualSize=google.maps.Size(20, 20)] The width and height values provided by
 * this property are the size (in pixels) of each of the images within <code>visualSprite</code>.
 * @property {Object} [visualTips={off: "Turn on drag zoom mode", on: "Turn off drag zoom mode"}]
 * An object literal defining the help tips that appear when
 * the mouse moves over the visual control. The <code>off</code> property is the tip to be shown
 * when the control is off and the <code>on</code> property is the tip to be shown when the
 * control is on.
 */
 /**
 * @name DragZoom
 * @class This class represents a drag zoom object for a map. The object is activated by holding down the hot key
 * or by turning on the visual control.
 * This object is created when <code>google.maps.Map.enableKeyDragZoom</code> is called; it cannot be created directly.
 * Use <code>google.maps.Map.getDragZoomObject</code> to gain access to this object in order to attach event listeners.
 * @param {Map} map The map to which the DragZoom object is to be attached.
 * @param {KeyDragZoomOptions} [opt_zoomOpts] The optional parameters.
 */
 function DragZoom(map, opt_zoomOpts) {
 var me = this;
 var ov = new google.maps.OverlayView();
 ov.onAdd = function () {
 me.init_(map, opt_zoomOpts);
 };
 ov.draw = function () {
 };
 ov.onRemove = function () {
 };
 ov.setMap(map);
 this.prjov_ = ov;
 }
 /**
 * Initialize the tool.
 * @param {Map} map The map to which the DragZoom object is to be attached.
 * @param {KeyDragZoomOptions} [opt_zoomOpts] The optional parameters.
 */
 DragZoom.prototype.init_ = function (map, opt_zoomOpts) {
 var i;
 var me = this;
 this.map_ = map;
 opt_zoomOpts = opt_zoomOpts || {};
 this.key_ = opt_zoomOpts.key || "shift";
 this.key_ = this.key_.toLowerCase();
 this.borderWidths_ = getBorderWidths(this.map_.getDiv());
 this.veilDiv_ = [];
 for (i = 0; i < 4; i++) {
 this.veilDiv_[i] = document.createElement("div");
 // Prevents selection of other elements on the webpage
 // when a drag zoom operation is in progress:
 this.veilDiv_[i].onselectstart = function () {
 return false;
 };
 // Apply default style values for the veil:
 setVals(this.veilDiv_[i].style, {
 backgroundColor: "gray",
 opacity: 0.25,
 cursor: "crosshair"
 });
 // Apply style values specified in veilStyle parameter:
 setVals(this.veilDiv_[i].style, opt_zoomOpts.paneStyle); // Old option name was "paneStyle"
 setVals(this.veilDiv_[i].style, opt_zoomOpts.veilStyle); // New name is "veilStyle"
 // Apply mandatory style values:
 setVals(this.veilDiv_[i].style, {
 position: "absolute",
 overflow: "hidden",
 display: "none"
 });
 // Workaround for Firefox Shift-Click problem:
 if (this.key_ === "shift") {
 this.veilDiv_[i].style.MozUserSelect = "none";
 }
 setOpacity(this.veilDiv_[i]);
 // An IE fix: If the background is transparent it cannot capture mousedown
 // events, so if it is, change the background to white with 0 opacity.
 if (this.veilDiv_[i].style.backgroundColor === "transparent") {
 this.veilDiv_[i].style.backgroundColor = "white";
 setOpacity(this.veilDiv_[i], 0);
 }
 this.map_.getDiv().appendChild(this.veilDiv_[i]);
 }

this.noZoom_ = opt_zoomOpts.noZoom || false;
    this.visualEnabled_ = opt_zoomOpts.visualEnabled || false;
    this.visualClass_ = opt_zoomOpts.visualClass || "";
    this.visualPosition_ = opt_zoomOpts.visualPosition || google.maps.ControlPosition.LEFT_TOP;
    this.visualPositionOffset_ = opt_zoomOpts.visualPositionOffset || new google.maps.Size(35, 0);
    this.visualPositionIndex_ = opt_zoomOpts.visualPositionIndex || null;
    this.visualSprite_ = opt_zoomOpts.visualSprite || "//maps.gstatic.com/mapfiles/ftr/controls/dragzoom_btn.png";
    this.visualSize_ = opt_zoomOpts.visualSize || new google.maps.Size(20, 20);
    this.visualTips_ = opt_zoomOpts.visualTips || {};
    this.visualTips_.off =  this.visualTips_.off || "Turn on drag zoom mode";
    this.visualTips_.on =  this.visualTips_.on || "Turn off drag zoom mode";

this.boxDiv_ = document.createElement("div");
    // Apply default style values for the zoom box:
    setVals(this.boxDiv_.style, {
      border: "4px solid #736AFF"
    });
    // Apply style values specified in boxStyle parameter:
    setVals(this.boxDiv_.style, opt_zoomOpts.boxStyle);
    // Apply mandatory style values:
    setVals(this.boxDiv_.style, {
      boxSizing: "content-box", // Added 2017-08-09
      position: "absolute",
      display: "none"
    });
    setOpacity(this.boxDiv_);
    this.map_.getDiv().appendChild(this.boxDiv_);
    this.boxBorderWidths_ = getBorderWidths(this.boxDiv_);

this.listeners_ = [
      google.maps.event.addDomListener(document, "keydown", function (e) {
        me.onKeyDown_(e);
      }),
      google.maps.event.addDomListener(document, "keyup", function (e) {
        me.onKeyUp_(e);
      }),
      google.maps.event.addDomListener(this.veilDiv_[0], "mousedown", function (e) {
        me.onMouseDown_(e);
      }),
      google.maps.event.addDomListener(this.veilDiv_[1], "mousedown", function (e) {
        me.onMouseDown_(e);
      }),
      google.maps.event.addDomListener(this.veilDiv_[2], "mousedown", function (e) {
        me.onMouseDown_(e);
      }),
      google.maps.event.addDomListener(this.veilDiv_[3], "mousedown", function (e) {
        me.onMouseDown_(e);
      }),
      google.maps.event.addDomListener(document, "mousedown", function (e) {
        me.onMouseDownDocument_(e);
      }),
      google.maps.event.addDomListener(document, "mousemove", function (e) {
        me.onMouseMove_(e);
      }),
      google.maps.event.addDomListener(document, "mouseup", function (e) {
        me.onMouseUp_(e);
      }),
      google.maps.event.addDomListener(window, "scroll", getScrollValue)
    ];

this.hotKeyDown_ = false;
    this.mouseDown_ = false;
    this.dragging_ = false;
    this.startPt_ = null;
    this.endPt_ = null;
    this.mapWidth_ = null;
    this.mapHeight_ = null;
    this.mousePosn_ = null;
    this.mapPosn_ = null;

if (this.visualEnabled_) {
 this.buttonDiv_ = this.initControl_(this.visualPositionOffset_);
 if (this.visualPositionIndex_ !== null) {
 this.buttonDiv_.index = this.visualPositionIndex_;
 }
 this.map_.controls[this.visualPosition_].push(this.buttonDiv_);
 this.controlIndex_ = this.map_.controls[this.visualPosition_].length - 1;
 }
 };
 /**
 * Initializes the visual control and returns its DOM element.
 * @param {Size} offset The offset of the control from its normal position.
 * @return {Node} The DOM element containing the visual control.
 */
 DragZoom.prototype.initControl_ = function (offset) {
 var control;
 var image;
 var me = this;
 
 control = document.createElement("div");
 control.className = this.visualClass_;
 control.style.position = "relative";
 control.style.overflow = "hidden";
 control.style.height = this.visualSize_.height + "px";
 control.style.width = this.visualSize_.width + "px";
 control.title = this.visualTips_.off;
 control.style.WebkitUserSelect = "none";
 control.style.KhtmlUserSelect = "none";
 control.style.MozUserSelect = "none";
 control.style.OUserSelect = "none";
 control.style.userSelect = "none";
 image = document.createElement("img");
 image.src = this.visualSprite_;
 image.style.position = "absolute";
 image.style.left = -(this.visualSize_.width * 2) + "px";
 image.style.top = 0 + "px";
 control.appendChild(image);
 control.onclick = function (e) {
 me.hotKeyDown_ = !me.hotKeyDown_;
 if (me.hotKeyDown_) {
 me.buttonDiv_.firstChild.style.left = -(me.visualSize_.width * 0) + "px";
 me.buttonDiv_.title = me.visualTips_.on;
 me.activatedByControl_ = true;
 google.maps.event.trigger(me, "activate");
 } else {
 me.buttonDiv_.firstChild.style.left = -(me.visualSize_.width * 2) + "px";
 me.buttonDiv_.title = me.visualTips_.off;
 google.maps.event.trigger(me, "deactivate");
 }
 me.onMouseMove_(e); // Updates the veil
 };
 control.onmouseover = function () {
 me.buttonDiv_.firstChild.style.left = -(me.visualSize_.width * 1) + "px";
 };
 control.onmouseout = function () {
 if (me.hotKeyDown_) {
 me.buttonDiv_.firstChild.style.left = -(me.visualSize_.width * 0) + "px";
 me.buttonDiv_.title = me.visualTips_.on;
 } else {
 me.buttonDiv_.firstChild.style.left = -(me.visualSize_.width * 2) + "px";
 me.buttonDiv_.title = me.visualTips_.off;
 }
 };
 control.ondragstart = function () {
 return false;
 };
 setVals(control.style, {
 cursor: "pointer",
 marginTop: offset.height + "px",
 marginLeft: offset.width + "px",
 marginRight: offset.width + "px"
 });
 return control;
 };
 /**
 * Returns <code>true</code> if the hot key is being pressed when an event occurs.
 * @param {Event} e The keyboard event.
 * @return {boolean} Flag indicating whether the hot key is down.
 */
 DragZoom.prototype.isHotKeyDown_ = function (e) {
 var isHot;
 e = e || window.event;
 isHot = (e.shiftKey && this.key_ === "shift") || (e.altKey && this.key_ === "alt") || (e.ctrlKey && this.key_ === "ctrl");
 if (!isHot) {
 // Need to look at keyCode for Opera because it
 // doesn't set the shiftKey, altKey, ctrlKey properties
 // unless a non-modifier event is being reported.
 //
 // See http://cross-browser.com/x/examples/shift_mode.php
 // Also see http://unixpapa.com/js/key.html
 switch (e.keyCode) {
 case 16:
 if (this.key_ === "shift") {
 isHot = true;
 }
 break;
 case 17:
 if (this.key_ === "ctrl") {
 isHot = true;
 }
 break;
 case 18:
 if (this.key_ === "alt") {
 isHot = true;
 }
 break;
 }
 }
 return isHot;
 };
 /**
 * Returns <code>true</code> if the mouse is on top of the map div.
 * The position is captured in onMouseMove_.
 * @return {boolean}
 */
 DragZoom.prototype.isMouseOnMap_ = function () {
 var mousePosn = this.mousePosn_;
 if (mousePosn) {
 var mapPosn = this.mapPosn_;
 var mapDiv = this.map_.getDiv();
 return mousePosn.left > mapPosn.left && mousePosn.left < (mapPosn.left + mapDiv.offsetWidth) &&
 mousePosn.top > mapPosn.top && mousePosn.top < (mapPosn.top + mapDiv.offsetHeight);
 } else {
 // if user never moved mouse
 return false;
 }
 };
 /**
 * Show the veil if the hot key is down and the mouse is over the map,
 * otherwise hide the veil.
 */
 DragZoom.prototype.setVeilVisibility_ = function () {
 var i;
 if (this.map_ && this.hotKeyDown_ && this.isMouseOnMap_()) {
 var mapDiv = this.map_.getDiv();
 this.mapWidth_ = mapDiv.offsetWidth - (this.borderWidths_.left + this.borderWidths_.right);
 this.mapHeight_ = mapDiv.offsetHeight - (this.borderWidths_.top + this.borderWidths_.bottom);
 if (this.activatedByControl_) { // Veil covers entire map (except control)
 var left = parseInt(this.buttonDiv_.style.left, 10) + this.visualPositionOffset_.width;
 var top = parseInt(this.buttonDiv_.style.top, 10) + this.visualPositionOffset_.height;
 var width = this.visualSize_.width;
 var height = this.visualSize_.height;
 // Left veil rectangle:
 this.veilDiv_[0].style.top = "0px";
 this.veilDiv_[0].style.left = "0px";
 this.veilDiv_[0].style.width = left + "px";
 this.veilDiv_[0].style.height = this.mapHeight_ + "px";
 // Right veil rectangle:
 this.veilDiv_[1].style.top = "0px";
 this.veilDiv_[1].style.left = (left + width) + "px";
 this.veilDiv_[1].style.width = (this.mapWidth_ - (left + width)) + "px";
 this.veilDiv_[1].style.height = this.mapHeight_ + "px";
 // Top veil rectangle:
 this.veilDiv_[2].style.top = "0px";
 this.veilDiv_[2].style.left = left + "px";
 this.veilDiv_[2].style.width = width + "px";
 this.veilDiv_[2].style.height = top + "px";
 // Bottom veil rectangle:
 this.veilDiv_[3].style.top = (top + height) + "px";
 this.veilDiv_[3].style.left = left + "px";
 this.veilDiv_[3].style.width = width + "px";
 this.veilDiv_[3].style.height = (this.mapHeight_ - (top + height)) + "px";
 for (i = 0; i < this.veilDiv_.length; i++) {
 this.veilDiv_[i].style.display = "block";
 }
 } else {
 this.veilDiv_[0].style.left = "0px";
 this.veilDiv_[0].style.top = "0px";
 this.veilDiv_[0].style.width = this.mapWidth_ + "px";
 this.veilDiv_[0].style.height = this.mapHeight_ + "px";
 for (i = 1; i < this.veilDiv_.length; i++) {
 this.veilDiv_[i].style.width = "0px";
 this.veilDiv_[i].style.height = "0px";
 }
 for (i = 0; i < this.veilDiv_.length; i++) {
 this.veilDiv_[i].style.display = "block";
 }
 }
 } else {
 for (i = 0; i < this.veilDiv_.length; i++) {
 this.veilDiv_[i].style.display = "none";
 }
 }
 };
 /**
 * Handle key down. Show the veil if the hot key has been pressed.
 * @param {Event} e The keyboard event.
 */
 DragZoom.prototype.onKeyDown_ = function (e) {
 if (this.map_ && !this.hotKeyDown_ && this.isHotKeyDown_(e)) {
 this.mapPosn_ = getElementPosition(this.map_.getDiv());
 this.hotKeyDown_ = true;
 this.activatedByControl_ = false;
 this.setVeilVisibility_();
 /**
 * This event is fired when the hot key is pressed.
 * @name DragZoom#activate
 * @event
 */
 google.maps.event.trigger(this, "activate");
 }
 };
 /**
 * Get the <code>google.maps.Point</code> of the mouse position.
 * @param {Event} e The mouse event.
 * @return {Point} The mouse position.
 */
 DragZoom.prototype.getMousePoint_ = function (e) {
 var mousePosn = getMousePosition(e);
 var p = new google.maps.Point();
 p.x = mousePosn.left - this.mapPosn_.left - this.borderWidths_.left;
 p.y = mousePosn.top - this.mapPosn_.top - this.borderWidths_.top;
 p.x = Math.min(p.x, this.mapWidth_);
 p.y = Math.min(p.y, this.mapHeight_);
 p.x = Math.max(p.x, 0);
 p.y = Math.max(p.y, 0);
 return p;
 };
 /**
 * Handle mouse down.
 * @param {Event} e The mouse event.
 */
 DragZoom.prototype.onMouseDown_ = function (e) {
 if (this.map_ && this.hotKeyDown_) {
 this.mapPosn_ = getElementPosition(this.map_.getDiv());
 this.dragging_ = true;
 this.startPt_ = this.endPt_ = this.getMousePoint_(e);
 this.boxDiv_.style.width = this.boxDiv_.style.height = "0px";
 var prj = this.prjov_.getProjection();
 var latlng = prj.fromContainerPixelToLatLng(this.startPt_);
 /**
 * This event is fired when the drag operation begins.
 * The parameter passed is the geographic position of the starting point.
 * @name DragZoom#dragstart
 * @param {LatLng} latlng The geographic position of the starting point.
 * @event
 */
 google.maps.event.trigger(this, "dragstart", latlng);
 }
 };
 /**
 * Handle mouse down at the document level.
 * @param {Event} e The mouse event.
 */
 DragZoom.prototype.onMouseDownDocument_ = function (e) {
 this.mouseDown_ = true;
 };
 /**
 * Handle mouse move.
 * @param {Event} e The mouse event.
 */
 DragZoom.prototype.onMouseMove_ = function (e) {
 this.mousePosn_ = getMousePosition(e);
 if (this.dragging_) {
 this.endPt_ = this.getMousePoint_(e);
 var left = Math.min(this.startPt_.x, this.endPt_.x);
 var top = Math.min(this.startPt_.y, this.endPt_.y);
 var width = Math.abs(this.startPt_.x - this.endPt_.x);
 var height = Math.abs(this.startPt_.y - this.endPt_.y);
 // For benefit of MSIE 7/8 ensure following values are not negative:
 var boxWidth = Math.max(0, width - (this.boxBorderWidths_.left + this.boxBorderWidths_.right));
 var boxHeight = Math.max(0, height - (this.boxBorderWidths_.top + this.boxBorderWidths_.bottom));
 // Left veil rectangle:
 this.veilDiv_[0].style.top = "0px";
 this.veilDiv_[0].style.left = "0px";
 this.veilDiv_[0].style.width = left + "px";
 this.veilDiv_[0].style.height = this.mapHeight_ + "px";
 // Right veil rectangle:
 this.veilDiv_[1].style.top = "0px";
 this.veilDiv_[1].style.left = (left + width) + "px";
 this.veilDiv_[1].style.width = (this.mapWidth_ - (left + width)) + "px";
 this.veilDiv_[1].style.height = this.mapHeight_ + "px";
 // Top veil rectangle:
 this.veilDiv_[2].style.top = "0px";
 this.veilDiv_[2].style.left = left + "px";
 this.veilDiv_[2].style.width = width + "px";
 this.veilDiv_[2].style.height = top + "px";
 // Bottom veil rectangle:
 this.veilDiv_[3].style.top = (top + height) + "px";
 this.veilDiv_[3].style.left = left + "px";
 this.veilDiv_[3].style.width = width + "px";
 this.veilDiv_[3].style.height = (this.mapHeight_ - (top + height)) + "px";
 // Selection rectangle:
 this.boxDiv_.style.top = top + "px";
 this.boxDiv_.style.left = left + "px";
 this.boxDiv_.style.width = boxWidth + "px";
 this.boxDiv_.style.height = boxHeight + "px";
 this.boxDiv_.style.display = "block";
 /**
 * This event is fired repeatedly while the user drags a box across the area of interest.
 * The southwest and northeast point are passed as parameters of type <code>google.maps.Point</code>
 * (for performance reasons), relative to the map container. Also passed is the projection object
 * so that the event listener, if necessary, can convert the pixel positions to geographic
 * coordinates using <code>google.maps.MapCanvasProjection.fromContainerPixelToLatLng</code>.
 * @name DragZoom#drag
 * @param {Point} southwestPixel The southwest point of the selection area.
 * @param {Point} northeastPixel The northeast point of the selection area.
 * @param {MapCanvasProjection} prj The projection object.
 * @event
 */
 google.maps.event.trigger(this, "drag", new google.maps.Point(left, top + height), new google.maps.Point(left + width, top), this.prjov_.getProjection());
 } else if (!this.mouseDown_) {
 this.mapPosn_ = getElementPosition(this.map_.getDiv());
 this.setVeilVisibility_();
 }
 };
 /**
 * Handle mouse up.
 * @param {Event} e The mouse event.
 */
 DragZoom.prototype.onMouseUp_ = function (e) {
 var z;
 var me = this;
 this.mouseDown_ = false;
 if (this.dragging_) {
 if ((this.getMousePoint_(e).x === this.startPt_.x) && (this.getMousePoint_(e).y === this.startPt_.y)) {
 this.onKeyUp_(e); // Cancel event
 return;
 }
 var left = Math.min(this.startPt_.x, this.endPt_.x);
 var top = Math.min(this.startPt_.y, this.endPt_.y);
 var width = Math.abs(this.startPt_.x - this.endPt_.x);
 var height = Math.abs(this.startPt_.y - this.endPt_.y);
 // Google Maps API bug: setCenter() doesn't work as expected if the map has a
 // border on the left or top. The code here includes a workaround for this problem.
 var kGoogleCenteringBug = true;
 if (kGoogleCenteringBug) {
 left += this.borderWidths_.left;
 top += this.borderWidths_.top;
 }

var prj = this.prjov_.getProjection();
      var sw = prj.fromContainerPixelToLatLng(new google.maps.Point(left, top + height));
      var ne = prj.fromContainerPixelToLatLng(new google.maps.Point(left + width, top));
      var bnds = new google.maps.LatLngBounds(sw, ne);

if (this.noZoom_) {
 this.boxDiv_.style.display = "none";
 } else {
 // Sometimes fitBounds causes a zoom OUT, so restore original zoom level if this happens.
 z = this.map_.getZoom();
 this.map_.fitBounds(bnds);
 if (this.map_.getZoom() < z) {
 this.map_.setZoom(z);
 }

// Redraw box after zoom:
 var swPt = prj.fromLatLngToContainerPixel(sw);
 var nePt = prj.fromLatLngToContainerPixel(ne);
 if (kGoogleCenteringBug) {
 swPt.x -= this.borderWidths_.left;
 swPt.y -= this.borderWidths_.top;
 nePt.x -= this.borderWidths_.left;
 nePt.y -= this.borderWidths_.top;
 }
 this.boxDiv_.style.left = swPt.x + "px";
 this.boxDiv_.style.top = nePt.y + "px";
 this.boxDiv_.style.width = (Math.abs(nePt.x - swPt.x) - (this.boxBorderWidths_.left + this.boxBorderWidths_.right)) + "px";
 this.boxDiv_.style.height = (Math.abs(nePt.y - swPt.y) - (this.boxBorderWidths_.top + this.boxBorderWidths_.bottom)) + "px";
 // Hide box asynchronously after 1 second:
 setTimeout(function () {
 me.boxDiv_.style.display = "none";
 }, 1000);
 }
 this.dragging_ = false;
 this.onMouseMove_(e); // Updates the veil
 /**
 * This event is fired when the drag operation ends.
 * The parameter passed is the geographic bounds of the selected area.
 * Note that this event is not fired if the hot key is released before the drag operation ends.
 * @name DragZoom#dragend
 * @param {LatLngBounds} bnds The geographic bounds of the selected area.
 * @event
 */
 google.maps.event.trigger(this, "dragend", bnds);
 // if the hot key isn't down, the drag zoom must have been activated by turning
 // on the visual control. In this case, finish up by simulating a key up event.
 if (!this.isHotKeyDown_(e)) {
 this.onKeyUp_(e);
 }
 }
 };
 /**
 * Handle key up.
 * @param {Event} e The keyboard event.
 */
 DragZoom.prototype.onKeyUp_ = function (e) {
 var i;
 var left, top, width, height, prj, sw, ne;
 var bnds = null;
 if (this.map_ && this.hotKeyDown_) {
 this.hotKeyDown_ = false;
 if (this.dragging_) {
 this.boxDiv_.style.display = "none";
 this.dragging_ = false;
 // Calculate the bounds when drag zoom was cancelled
 left = Math.min(this.startPt_.x, this.endPt_.x);
 top = Math.min(this.startPt_.y, this.endPt_.y);
 width = Math.abs(this.startPt_.x - this.endPt_.x);
 height = Math.abs(this.startPt_.y - this.endPt_.y);
 prj = this.prjov_.getProjection();
 sw = prj.fromContainerPixelToLatLng(new google.maps.Point(left, top + height));
 ne = prj.fromContainerPixelToLatLng(new google.maps.Point(left + width, top));
 bnds = new google.maps.LatLngBounds(sw, ne);
 }
 for (i = 0; i < this.veilDiv_.length; i++) {
 this.veilDiv_[i].style.display = "none";
 }
 if (this.visualEnabled_) {
 this.buttonDiv_.firstChild.style.left = -(this.visualSize_.width * 2) + "px";
 this.buttonDiv_.title = this.visualTips_.off;
 this.buttonDiv_.style.display = "";
 }
 /**
 * This event is fired when the hot key is released.
 * The parameter passed is the geographic bounds of the selected area immediately
 * before the hot key was released.
 * @name DragZoom#deactivate
 * @param {LatLngBounds} bnds The geographic bounds of the selected area immediately
 * before the hot key was released.
 * @event
 */
 google.maps.event.trigger(this, "deactivate", bnds);
 }
 };
 /**
 * @name google.maps.Map
 * @class These are new methods added to the Google Maps JavaScript API V3's
 * <a href="http://code.google.com/apis/maps/documentation/javascript/reference.html#Map">Map</a>
 * class.
 */
 /**
 * Enables drag zoom. The user can zoom to an area of interest by holding down the hot key
 * <code>(shift | ctrl | alt )</code> while dragging a box around the area or by turning
 * on the visual control then dragging a box around the area.
 * @param {KeyDragZoomOptions} opt_zoomOpts The optional parameters.
 */
 google.maps.Map.prototype.enableKeyDragZoom = function (opt_zoomOpts) {
 this.dragZoom_ = new DragZoom(this, opt_zoomOpts);
 };
 /**
 * Disables drag zoom.
 */
 google.maps.Map.prototype.disableKeyDragZoom = function () {
 var i;
 var d = this.dragZoom_;
 if (d) {
 for (i = 0; i < d.listeners_.length; ++i) {
 google.maps.event.removeListener(d.listeners_[i]);
 }
 this.getDiv().removeChild(d.boxDiv_);
 for (i = 0; i < d.veilDiv_.length; i++) {
 this.getDiv().removeChild(d.veilDiv_[i]);
 }
 if (d.visualEnabled_) {
 // Remove the custom control:
 this.controls[d.visualPosition_].removeAt(d.controlIndex_);
 }
 d.prjov_.setMap(null);
 this.dragZoom_ = null;
 }
 };
 /**
 * Returns <code>true</code> if the drag zoom feature has been enabled.
 * @return {boolean}
 */
 google.maps.Map.prototype.keyDragZoomEnabled = function () {
 return this.dragZoom_ !== null;
 };
 /**
 * Returns the DragZoom object which is created when <code>google.maps.Map.enableKeyDragZoom</code> is called.
 * With this object you can use <code>google.maps.event.addListener</code> to attach event listeners
 * for the "activate", "deactivate", "dragstart", "drag", and "dragend" events.
 * @return {DragZoom}
 */
 google.maps.Map.prototype.getDragZoomObject = function () {
 return this.dragZoom_;
 };
})();

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