Swimlane

The Swimlane widget streams live values across independent lanes, one lane per signal, scrolling right to left. Each lane has its own vertical scale, so a value that moves a little and a value that moves a lot are both readable side by side.

Use it to watch many sensors at once and catch a spike as it happens. It is a live view, not a history: values scroll off the left edge and are not kept.

For plotting history rather than watching it arrive, use the Multi-device chart instead.

Setup

A signal is one device plus one field. The widget needs at least one.

1. Under Devices, select the devices to add.
2. Pick the field. The field list comes from the first device you selected, and the field you choose is applied to every device in the selection.
3. Press Add signals. Devices that already have that signal are skipped, and the widget says how many.
4. Repeat for each field you want. A device can appear in several lanes, one per field.

The Signals list below shows what the widget will draw. Press the pencil on a row to edit it, or the cross to remove it.

Per-signal setting	What it does
Label	The lane's name. Defaults to the field name
Unit	The unit shown after the value
Base color	The colour of the lane's trace

Options

Setting	What it does
Window	How much time is visible before values scroll off the left: 30 seconds, 1 minute, 2 minutes, 5 minutes or 10 minutes. The default is 1 minute
Show value	Whether the current number is printed on each lane
Heading	An optional heading for the widget. The toggle beside it shows or hides the heading

The widget polls for new values every 15 seconds, so a shorter window scrolls in larger steps rather than more smoothly. It keeps at most 600 samples per lane in memory, whatever the window.