viewerDragDropMixin(viewer, options)

A mixin which adds default drag and drop support for CZML files to the Viewer widget. Rather than being called directly, this function is normally passed as a parameter to Viewer#extend, as shown in the example below.
Name Type Description
viewer Viewer The viewer instance.
options Object optional Object with the following properties:
Name Type Default Description
dropTarget Element | String viewer.container optional The DOM element which will serve as the drop target.
clearOnDrop Boolean true optional When true, dropping files will clear all existing data sources first, when false, new data sources will be loaded after the existing ones.
// Add basic drag and drop support and pop up an alert window on error.
var viewer = new Cesium.Viewer('cesiumContainer');
viewer.dropError.addEventListener(function(viewerArg, source, error) {
    window.alert('Error processing ' + source + ':' + error);


clearOnDrop :Boolean

Gets or sets a value indicating if existing data sources should be cleared before adding the newly dropped sources.

dropEnabled :Element

Gets or sets a value indicating if drag and drop support is enabled.

dropError :Event

Gets the event that will be raised when an error is encountered during drop processing.

dropTarget :Element

Gets or sets the element to serve as the drop target.