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Callbacks

The optional JavaScript callback functions enables developers to react on events fired by FSI TouchZoom.

Refer to the appropriate chapter to learn how to implement callbacks.

onConfigsReady​

onConfigsReady(config)
Called as soon as the configuration is loaded.
config
object
Configuration parameters as object
instance.addListener('onConfigsReady', (config) => {
  // config loaded
  myFunc(config)
})
Example

onDestroy​

onDestroy()
Called as soon as the viewer is destroyed.
instance.addListener('onDestroy', () => {
  // instance is destroyed
  doReallyGoodThings()
})
Example

onInit​

onInit(parameters)
Called as soon as the viewer is initialized.
parameters
object
parameters as object
instance.addListener('onInit', (parameters) => {
  // instance is initialized
  myFunc(parameters)
})
Example

onReady​

onReady()
Called as soon as the instance is ready.
instance.addListener('onReady', () => {
  // instance is ready
  doReallyGoodThings()
})
Example

onZoomChanged​

onZoomChanged(docScale, pixelRatio)
Called as soon as the zoom scope is changed.
docScale
float
the document scale
pixelRatio
object
document scale pixel ratio
instance.addListener('onZoomChanged', (docScale, pixelRatio) => {
  // zoom scope changed
  myFunc(docScale, pixelRatio)
})
Example