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/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Popup.js
*/
/**
* Class: OpenLayers.Popup.Anchored
*
* Inherits from:
* - <OpenLayers.Popup>
*/
OpenLayers.Popup.Anchored =
OpenLayers.Class(OpenLayers.Popup, {
/**
* Property: relativePosition
* {String} Relative position of the popup ("br", "tr", "tl" or "bl").
*/
relativePosition: null,
/**
* APIProperty: keepInMap
* {Boolean} If panMapIfOutOfView is false, and this property is true,
* contrain the popup such that it always fits in the available map
* space. By default, this is set. If you are creating popups that are
* near map edges and not allowing pannning, and especially if you have
* a popup which has a fixedRelativePosition, setting this to false may
* be a smart thing to do.
*
* For anchored popups, default is true, since subclasses will
* usually want this functionality.
*/
keepInMap: true,
/**
* Property: anchor
* {Object} Object to which we'll anchor the popup. Must expose a
* 'size' (<OpenLayers.Size>) and 'offset' (<OpenLayers.Pixel>).
*/
anchor: null,
/**
* Constructor: OpenLayers.Popup.Anchored
*
* Parameters:
* id - {String}
* lonlat - {<OpenLayers.LonLat>}
* contentSize - {<OpenLayers.Size>}
* contentHTML - {String}
* anchor - {Object} Object which must expose a 'size' <OpenLayers.Size>
* and 'offset' <OpenLayers.Pixel> (generally an <OpenLayers.Icon>).
* closeBox - {Boolean}
* closeBoxCallback - {Function} Function to be called on closeBox click.
*/
initialize:function(id, lonlat, contentSize, contentHTML, anchor, closeBox,
closeBoxCallback) {
var newArguments = [
id, lonlat, contentSize, contentHTML, closeBox, closeBoxCallback
];
OpenLayers.Popup.prototype.initialize.apply(this, newArguments);
this.anchor = (anchor != null) ? anchor
: { size: new OpenLayers.Size(0,0),
offset: new OpenLayers.Pixel(0,0)};
},
/**
* APIMethod: destroy
*/
destroy: function() {
this.anchor = null;
this.relativePosition = null;
OpenLayers.Popup.prototype.destroy.apply(this, arguments);
},
/**
* APIMethod: show
* Overridden from Popup since user might hide popup and then show() it
* in a new location (meaning we might want to update the relative
* position on the show)
*/
show: function() {
this.updatePosition();
OpenLayers.Popup.prototype.show.apply(this, arguments);
},
/**
* Method: moveTo
* Since the popup is moving to a new px, it might need also to be moved
* relative to where the marker is. We first calculate the new
* relativePosition, and then we calculate the new px where we will
* put the popup, based on the new relative position.
*
* If the relativePosition has changed, we must also call
* updateRelativePosition() to make any visual changes to the popup
* which are associated with putting it in a new relativePosition.
*
* Parameters:
* px - {<OpenLayers.Pixel>}
*/
moveTo: function(px) {
var oldRelativePosition = this.relativePosition;
this.relativePosition = this.calculateRelativePosition(px);
OpenLayers.Popup.prototype.moveTo.call(this, this.calculateNewPx(px));
//if this move has caused the popup to change its relative position,
// we need to make the appropriate cosmetic changes.
if (this.relativePosition != oldRelativePosition) {
this.updateRelativePosition();
}
},
/**
* APIMethod: setSize
*
* Parameters:
* contentSize - {<OpenLayers.Size>} the new size for the popup's
* contents div (in pixels).
*/
setSize:function(contentSize) {
OpenLayers.Popup.prototype.setSize.apply(this, arguments);
if ((this.lonlat) && (this.map)) {
var px = this.map.getLayerPxFromLonLat(this.lonlat);
this.moveTo(px);
}
},
/**
* Method: calculateRelativePosition
*
* Parameters:
* px - {<OpenLayers.Pixel>}
*
* Returns:
* {String} The relative position ("br" "tr" "tl" "bl") at which the popup
* should be placed.
*/
calculateRelativePosition:function(px) {
var lonlat = this.map.getLonLatFromLayerPx(px);
var extent = this.map.getExtent();
var quadrant = extent.determineQuadrant(lonlat);
return OpenLayers.Bounds.oppositeQuadrant(quadrant);
},
/**
* Method: updateRelativePosition
* The popup has been moved to a new relative location, so we may want to
* make some cosmetic adjustments to it.
*
* Note that in the classic Anchored popup, there is nothing to do
* here, since the popup looks exactly the same in all four positions.
* Subclasses such as Framed, however, will want to do something
* special here.
*/
updateRelativePosition: function() {
//to be overridden by subclasses
},
/**
* Method: calculateNewPx
*
* Parameters:
* px - {<OpenLayers.Pixel>}
*
* Returns:
* {<OpenLayers.Pixel>} The the new px position of the popup on the screen
* relative to the passed-in px.
*/
calculateNewPx:function(px) {
var newPx = px.offset(this.anchor.offset);
//use contentSize if size is not already set
var size = this.size || this.contentSize;
var top = (this.relativePosition.charAt(0) == 't');
newPx.y += (top) ? -size.h : this.anchor.size.h;
var left = (this.relativePosition.charAt(1) == 'l');
newPx.x += (left) ? -size.w : this.anchor.size.w;
return newPx;
},
CLASS_NAME: "OpenLayers.Popup.Anchored"
});
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