43 lines
2.3 KiB
C++
43 lines
2.3 KiB
C++
// spline_edit.h — THE point-editing grammar, and the one place it is written down. Both spline
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// consumers route their mouse-down through it — the velocity-curve popup and the spline EG
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// overlay — so the two cannot drift into two grammars. Mirror of envelope_edit: decision logic
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// only, no host types, no drawing.
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#pragma once
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#include "core/instrument/engine/velocity_curve.h"
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#include "core/instrument/ui/editor_geometry.h" // Rect / OverlayArea
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namespace reasampler::instrument::ui {
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using engine::VelocityCurve;
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// The gesture, in the pure module's own vocabulary (the shell maps its modifier state onto it).
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enum class SplineGesture { kLeft, kRight, kControlLeft };
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// What the gesture resolves to. Left-click adds a point in empty space and grabs an existing
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// one; right-click deletes; control-click toggles hard/smooth. Points are smooth by default.
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enum class SplineEditKind { kNone, kGrab, kAdd, kDelete, kToggleHard };
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struct SplineEdit {
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SplineEditKind kind = SplineEditKind::kNone;
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int index = -1; // the point the action targets; -1 for kAdd (it has none yet) and kNone
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};
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// Resolves a click at (x, y) over `box` into an edit. The endpoint and point-count rules are
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// NOT re-stated here — kDelete on an endpoint and kAdd at the ceiling are refused by
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// VelocityCurve::deletePoint / addPoint, which the caller applies, so there is exactly one home
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// for each. A click outside the mapping box resolves to kNone unless it lands on a node's pick
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// radius: the drawn inset ring must not ADD (the new point would clamp onto an endpoint's x and
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// stack an undeletable duplicate) but must still be able to grab.
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SplineEdit resolveSplineEdit(const VelocityCurve& curve, const VelocityCurve::Box& box,
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SplineGesture gesture, int x, int y);
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// The contour's mapping box inside the waveform overlay: the FULL area, so the drawn contour
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// spans the whole sample width 1:1 with its time axis. No inset — unlike the popup's box, which
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// insets to keep endpoint handles clear of the sheet border, this one must stay 1:1 with the
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// waveform beneath it. Takes the overlay (not a lane) — see waveform_view.h's overlay contract.
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VelocityCurve::Box splineOverlayBox(const OverlayArea& area);
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} // namespace reasampler::instrument::ui
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