gridSize |
number
|
<optional>
|
60
|
The grid size of a cluster in pixels. The grid is a square. |
maxZoom |
number
|
<optional>
|
null
|
The maximum zoom level at which clustering is enabled or
null if clustering is to be enabled at all zoom levels. |
zoomOnClick |
boolean
|
<optional>
|
true
|
Whether to zoom the map when a cluster marker is
clicked. You may want to set this to false if you have installed a handler
for the click event and it deals with zooming on its own. |
averageCenter |
boolean
|
<optional>
|
false
|
Whether the position of a cluster marker should be
the average position of all markers in the cluster. If set to false, the
cluster marker is positioned at the location of the first marker added to the cluster. |
minimumClusterSize |
number
|
<optional>
|
2
|
The minimum number of markers needed in a cluster
before the markers are hidden and a cluster marker appears. |
ignoreHidden |
boolean
|
<optional>
|
false
|
Whether to ignore hidden markers in clusters. You
may want to set this to true to ensure that hidden markers are not included
in the marker count that appears on a cluster marker (this count is the value of the
text property of the result returned by the default calculator).
If set to true and you change the visibility of a marker being clustered, be
sure to also call MarkerClusterer.repaint(). |
title |
string
|
<optional>
|
""
|
The tooltip to display when the mouse moves over a cluster
marker. (Alternatively, you can use a custom calculator function to specify a
different tooltip for each cluster marker.) |
calculator |
function
|
<optional>
|
MarkerClusterer.CALCULATOR
|
The function used to determine
the text to be displayed on a cluster marker and the index indicating which style to use
for the cluster marker. The input parameters for the function are (1) the array of markers
represented by a cluster marker and (2) the number of cluster icon styles. It returns a
ClusterIconInfo object. The default calculator returns a
text property which is the number of markers in the cluster and an
index property which is one higher than the lowest integer such that
10^i exceeds the number of markers in the cluster, or the size of the styles
array, whichever is less. The styles array element used has an index of
index minus 1. For example, the default calculator returns a
text value of "125" and an index of 3
for a cluster icon representing 125 markers so the element used in the styles
array is 2. A calculator may also return a title
property that contains the text of the tooltip to be used for the cluster marker. If
title is not defined, the tooltip is set to the value of the title
property for the MarkerClusterer. |
clusterClass |
string
|
<optional>
|
"cluster"
|
The name of the CSS class defining general styles
for the cluster markers. Use this class to define CSS styles that are not set up by the code
that processes the styles array. |
styles |
Array
|
<optional>
|
|
An array of ClusterIconStyle elements defining the styles
of the cluster markers to be used. The element to be used to style a given cluster marker
is determined by the function defined by the calculator property.
The default is an array of ClusterIconStyle elements whose properties are derived
from the values for imagePath, imageExtension, and
imageSizes. |
enableRetinaIcons |
boolean
|
<optional>
|
false
|
Whether to allow the use of cluster icons that
have sizes that are some multiple (typically double) of their actual display size. Icons such
as these look better when viewed on high-resolution monitors such as Apple's Retina displays.
Note: if this property is true, sprites cannot be used as cluster icons. |
batchSize |
number
|
<optional>
|
MarkerClusterer.BATCH_SIZE
|
Set this property to the
number of markers to be processed in a single batch when using a browser other than
Internet Explorer (for Internet Explorer, use the batchSizeIE property instead). |
batchSizeIE |
number
|
<optional>
|
MarkerClusterer.BATCH_SIZE_IE
|
When Internet Explorer is
being used, markers are processed in several batches with a small delay inserted between
each batch in an attempt to avoid Javascript timeout errors. Set this property to the
number of markers to be processed in a single batch; select as high a number as you can
without causing a timeout error in the browser. This number might need to be as low as 100
if 15,000 markers are being managed, for example. |
imagePath |
string
|
<optional>
|
MarkerClusterer.IMAGE_PATH
|
The full URL of the root name of the group of image files to use for cluster icons.
The complete file name is of the form imagePathn.imageExtension
where n is the image file number (1, 2, etc.). |
imageExtension |
string
|
<optional>
|
MarkerClusterer.IMAGE_EXTENSION
|
The extension name for the cluster icon image files (e.g., "png" or
"jpg"). |
imageSizes |
Array
|
<optional>
|
MarkerClusterer.IMAGE_SIZES
|
An array of numbers containing the widths of the group of
imagePathn.imageExtension image files.
(The images are assumed to be square.) |