Martino FerrariandClaude Sonnet 4.6
328588a8b9
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
64 lines
2.7 KiB
Plaintext
64 lines
2.7 KiB
Plaintext
<page xmlns="http://projectmallard.org/1.0/"
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type="topic" style="task"
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id="pause">
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<info>
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<link type="guide" xref="index#viewing"/>
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<link type="seealso" xref="trigger"/>
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<desc>Pausing freezes the display without stopping the stream, and the status bar says how
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long you have been paused.</desc>
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<credit type="author copyright">
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<name>Martino Ferrari</name>
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</credit>
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</info>
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<title>Pause and play</title>
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<p>Pause freezes the <em>display</em>, not the acquisition. The producer keeps filling the
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ring at full rate; the view binds an immutable snapshot of the window that was on screen,
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and the axis is pinned to it.</p>
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<section id="reach">
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<title>How to reach it</title>
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<steps>
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<item>
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<p>Press the pause button in the header bar, or <key>Space</key>.</p>
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</item>
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<item>
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<p>Press it again to resume, which rebinds the live ring and puts the window back on
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the newest data.</p>
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</item>
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</steps>
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</section>
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<section id="knowing">
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<title>Worth knowing</title>
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<list>
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<item><p>Nothing is lost while paused. Because the producer never stops, resuming shows
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current data with no hole in the history behind it.</p></item>
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<item><p>The axis is pinned to the <em>snapshot's own stamps</em>, not to the window that
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was requested. A window reaching back past the oldest retained sample yields a shorter
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snapshot, and the pinned axis is that shorter span — so you see a narrower view rather
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than an empty margin.</p></item>
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<item><p>A paused view is pinned exactly as a held trigger event is: zoom in freely, but
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a pan or a zoom out is clamped to the snapshot's data. A measurement goes on describing
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that frozen frame rather than the part of it you are looking at, so a zoom on a pause
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changes no reading — see <link xref="measurements"/>.</p></item>
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<item><p>Pausing is the easiest way to measure a layout or read a cursor precisely,
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because nothing under the pointer moves between frames.</p></item>
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<item><p>The status bar says how long you have been paused — wall time, since the stream
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itself never stopped. It is there so a frozen picture cannot be mistaken for a live one
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that went quiet.</p></item>
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</list>
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</section>
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<section id="example">
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<title>Example</title>
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<p>Pause with a 2 s window over a ring holding 1.4 s: the frozen axis reads
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<code>[-1.40 .. 0.00]</code> rather than <code>[-2.00 .. 0.00]</code> with 0.6 s of blank.
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The pause probe reports <code>ring_produced</code> still growing across the pause and
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<code>event_size</code> non-zero exactly while paused.</p>
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</section>
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</page>
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