Raises the ActiveItemChanged event.
ImageViewer.prototype.onActiveItemChanged = function(
): void; // protected
Raising an event invokes the event handler through a delegate. The OnActiveItemChanged method also allows derived classes to handle the event without attaching a delegate. This is the preferred technique for handling the event in a derived class.
Note to Inheritors: When overriding OnActiveItemChanged in a derived class, be sure to call the base class's OnActiveItemChanged method so that registered delegates receive the event.
For more information, refer to Image Viewer Items.
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