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filmcraft/docs
BloxyandClaude Opus 5.5 4eb34ae6c7 #259: the edge you press is the edge you trim
Pressing a clip edge and dragging inward selected and moved the clip: the press was hit-tested
only once egui recognised a drag, 6 pt later, by when the pointer had left the 7 px edge zone.
And at a cut the left clip's Out edge claimed both sides, so the right clip's In edge could not
be grabbed.

What a press grabs is now worked out on the frame the button goes down (timeline_hit::grab_at,
shared by the cursor, the press and ui.timeline.hit) and acted on by both the click and the
drag. Inside a clip beats outside it, so the side of a cut picks the clip; zero-width clips
have no edges. Trims, rolls, rate stretches and remixes move by how far the pointer moved since
the press, and a moved clip stays under the point it was grabbed by. ui.timeline.hit takes
`modifiers` and reports `kind`, the trim a press would start.

Unit tests for the zones and tools; headless UI tests that drag a pixel or a few per frame at
60 fps (before: the clip moved, the wrong clip was trimmed, a wobbly click selected the clip, a
moved clip lagged).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-09 11:27:48 +02:00
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