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Extended host callback interface for an edit controller: Vst::IProgress
- [host imp]
|Allows the plug-in to request the host to create a progress for some specific tasks which take some time.|
The host can visualize the progress as read-only UI elements. For example, after loading a project where a plug-in needs to load extra data (e.g. samples) in a background thread, this enables the host to get and visualize the current status of the loading progress and to inform the user when the loading is finished. Note: During the progress, the host can unload the plug-in at any time. Make sure that the plug-in supports this use case.
How to call it from the plug-in side
//-------------------------------------- // we are in the editcontroller: // as member: IProgress::ID mProgressID; FUnknownPtr<IProgress> progress (componentHandler); if (progress) progress->start (IProgress::ProgressType::UIBackgroundTask, STR ("Load Samples..."), mProgressID); // ... myProgressValue += incProgressStep; FUnknownPtr<IProgress> progress (componentHandler); if (progress) progress->update (mProgressID, myProgressValue); // ... FUnknownPtr<IProgress> progress (componentHandler); if (progress) progress->finish (mProgressID);
VST 3 Plug-in Test Host integration of Vst::IProgress
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