Hello,I'm looking to make a dot density map with a DynamicMapServiceLayer (dynamic layer). While I've seen dynamic layers used in other rendering types (such as Class Breaks), I haven't seen one for dot density (the examples I have seen use a FeatureLayer instead). I've been testing a potential solution below. The following script is based on https://developers.arcgis.com/javascript/jssamples/renderer_dynamic_layer_change_attribute.html. The only change I made was to swap out the classbreaks function for a dot density function (to create a dot density renderer). My questions are:Have you seen any examples using a dot density renderer with a dynamic Layer? The Classbreaks function uses a generateRendererTask when setting up the LayerDrawingOptions. Does the dot density use the same Task? Thank you for your time,David
function getData() {
domStyle.set("loading", "visibility", "visible");
dotDensity();
}
function dotDensity() {
selectField = registry.byId("fieldNames").get("value") || "POP2007";
console.log(selectField);
var renderer = new DotDensityRenderer({
fields: [{
name: selectField,
color: new Color("#CC8800")
}],
dotValue: 3200,
dotSize: 1
});
applyRenderer(renderer); // this is one part I'm not sure of.
// do I need to put this in a GenerateRendererTask?
}
function applyRenderer(renderer) {
// dynamic layer stuff
var optionsArray = [];
var drawingOptions = new LayerDrawingOptions();
drawingOptions.renderer = renderer;
// set the drawing options for the relevant layer
// optionsArray index corresponds to layer index in the map service
optionsArray[2] = drawingOptions;
app.map.getLayer("us_counties").setLayerDrawingOptions(optionsArray);
app.map.getLayer("us_counties").show();
// create the legend if it doesn't exist
if ( ! app.hasOwnProperty("legend") ) {
createLegend();
}
}
