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multi_staff_example: implement MultiStaffRenderer for score rendering #7
Description
Context
In example/lib/examples/multi_staff_example.dart:221 there is a TODO:
// TODO: Render score using MultiStaffRenderer
// For now, show staff groups infoTask
Implement MultiStaffRenderer (or equivalent) to render a full Score (with multiple StaffGroups and Staffs) on a single canvas, replacing the current fallback that only shows metadata.
Acceptance criteria
MultiStaffRendererrenders all staff groups in the score vertically- Braces/brackets for staff groups are drawn correctly
- The multi_staff_example.dart demo uses the renderer to display an actual score
Notes
StaffGroupandScoreclasses already exist inlib/core/- Brace rendering is tracked in issue Staff group brace: migrate from custom path to SMuFL brace glyph workflow #3
Activity
feat: release 2.5.0 with MEI v5 100% conformance and code quality fixes
feat: release 2.5.0 with MEI v5 100% conformance and code quality fixes
docs(issues): mark multi-staff (#7) addressed and Jianpu as WIP
feat(example): expand the gallery to the use cases it never covered
alessonqueirozdev-hub commentedon Aug 31, 2026
Fixed in 2.8.0. What this asked for exists under a different name:
ScoreViewrenders a wholeScore— everyStaffGroupstacked vertically, each aligned on the shared horizontal onset grid (ADR-002), with its brace or bracket and its system-spanning barlines actually drawn.What was missing was anywhere to see it.
multi_staff_example.darthad a// TODO: Render score using MultiStaffRendererand printed the group metadata as text instead — a placeholder that reads as a feature, since printing "Bracket Type: brace" next to a score with no brace in it looks like output. It now renders the score withScoreViewand keeps the metadata card underneath as a description of the score above it rather than a stand-in for one.There is also a gallery page for the case that actually needs a
Scorerather than a singleStaffGroup: Ensemble Scores, with a four-staff bracketed choir above a two-staff piano brace, different rhythms per group, on one grid.Worth knowing if you look at that alignment: it was measurably wrong until 2.8.0. The shared grid took the widest ABSOLUTE X at each onset, so a dense passage on one staff stole space from the others — an SATB choir's four quarters spaced 61 / 61 / 60 px alone and collapsed to 118 / 28 / 35 beside a piano triplet. It is built from per-onset STEPS now.