Timeline Widget

Welcome to the Timeline Widget docs.

Timeline Widget

Summary

The Timeline Widget visualizes Tango attribute values across time using the same HDB++ history and live-stream core used by the HDBPP Live widget.

It is designed for operational monitoring where you need to:

  • track recent behavior of multiple attributes in one plot

  • switch between historical windows and live updates

  • detect value changes, missing data, and attribute outliers quickly

When to use this widget

Use the Timeline Widget when you want a time-oriented operational view of many attributes, especially for station/device status monitoring.

Typical use cases:

  • monitor TPM programming state or temperature trends across a station

  • compare the same attribute across many devices over the same time range

  • watch live transitions while keeping historical context

Display modes

  • Line mode (barView = false): best for trend inspection and exact value-over-time reading.

  • Bar view (barView = true): best for dense comparisons across many attributes.

Data sources

  • History: hdbppHistory query, with optional server-side downsampling.

  • Live: tangoAttributes subscription, with optional append throttling via appendInterval.

Overview