Events

The Autodesk MapGuide Viewer API fires a number of events that can be used to determine when the selection changes, when the map is redrawn, or when map features are double-clicked. In addition, events are used upon completion of certain API requests. For additional information about events, observers, and setting up event handler interfaces, refer to "Handling Busy State and Map Refresh" in the Autodesk MapGuide Developer's Guide.

onBusyStateChanged, onMapLoaded, onViewChanged, and onViewChanging might not work properly under Netscape 4.x when the map is first loaded. This is because the observer applet loads on a different thread from the map, so the map might load before the observer applet has finished loading. These events work correctly after the map and the observer applet have both finished fully loading. The workaround to this limitation is to use the ActiveX Control, or to avoid relying on these events when the map first loads.