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Add fast, interactive zooming/panning#1969

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psavery wants to merge 2 commits intomasterfrom
fast-scroll-zoom
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Add fast, interactive zooming/panning#1969
psavery wants to merge 2 commits intomasterfrom
fast-scroll-zoom

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@psavery psavery commented Feb 25, 2026

Zooming is performed with the mouse wheel. Panning via left-click and drag.

It seems to be working really well, although there is room for more improvements.

It is inspired by some of PyQtGraph.

Supersedes: #1820

Zooming is performed with the mouse wheel. Panning via left-click and
drag.

It seems to be working really well, although there is room for more
improvements.

It is inspired by some of PyQtGraph.

Signed-off-by: Patrick Avery <patrick.avery@kitware.com>
Before this, the home button would change to the last state from
interaction. Now, the home button always goes back to the preinteractive
state.

Signed-off-by: Patrick Avery <patrick.avery@kitware.com>
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