Files
qelectrotech-source-mirror/sources
ispyisail ffa76a61c1 Add an Arc tool and a handle to pull a half arc in or out (#408)
The diagram toolbar gets an "Ajouter un arc" button next to the
ellipse. Click one end, then click the other end at the height the arc
should reach: the result is a half arc bulging up or down from the line
between the two clicks (Shift: a true half circle). It is not filled,
since a fill would close it into a half disc.

A selected half arc shows one more handle, in the middle of the curve.
Dragging it makes the arc deeper or flatter while both ends stay put;
dragging it across the line between the ends turns the arc over. The
handle is hidden whenever the arc is not a half arc on a horizontal or
vertical diameter, because only then is "keep the ends, move the
middle" one well-defined change.

Nothing new is stored: an arc stays an Ellipse with a start and end
angle, exactly as the existing arc handles of an ellipse save it, so
files read by older versions are unchanged.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-01 22:49:35 +13:00
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fix
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