Pdf
Interface for a class that can return a list of PdfDrawable instances that should be drawn on top of the document.
See also
Inheritors
Types
An observer interested in changes to the underlying set of drawables.
Functions
By overriding this method subclasses can define a set of page numbers for which drawables are available. The default implementation returns an empty set, which will cause PSPDFKit to ask the provider every time page drawables are required, independent of the page number. Consider overriding this method if the loaded document has many pages, but only a few of them contain drawables.
Notifies all registered DrawableProviderObserver instances that the drawables have changed and need to be reloaded and redrawn. If only drawables for a single page have changed, consider calling notifyDrawablesChanged instead.
Notifies all registered DrawableProviderObserver instances that the drawables for the given pageIndex have changed and need to be reloaded and redrawn.
Register a DrawableProviderObserver to be notified of changes of provided drawables. If the observer has been registered previously, a call to this method is a no-op.
Unregister a previously registered DrawableProviderObserver so it won't receive any future changes of provided drawables.