Class EventBus

The image viewer event bus.

Description

Use the event bus to listen and receive certain specific "events". Available events are: "before-open", "after-open", "before-close", "after-close", "zoom-changed", "frame-index-changed", "animation-started", "animation-stopped".

Example

// Liisten frame index changes:
viewer.eventBus.on("frame-index-changed", function(args) { console.log("Image frame changed", args); });

Example

// Listen "after-open" event once:
viewer.eventBus.on("after-open", function(args) { console.log("Image opened", args); }, { once: true });