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Can the JPedal Viewer be used SWT?

Yes, but we do not recommend it.

The JPedal Viewer hs been created using Swing components with some JavaFX used in the Viewers PageFlow mode.

Whilst SWT has a Component for embedding Swing content in SWT the interaction between the two systems can cause issues not seen when performing the equivalent actions in Swing components.

When integrating the two you may encounter rendering issues that can cause interface items to appear blank, blank pdf pages, or even threading issues due race conditions between SWT and Swing. Due to these known issues and the cause being the interaction between the two system we so not provide support for issues caused by SWT/Swing integrations.