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M4: vector edit transform box and point snapping (#64)

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- Transform box around 2+ selected points (Move tool): corners/edges scale
  them (Shift keeps proportions, Alt from the centre), just outside a corner
  rotates them (Shift: 15° steps, the box turns with them), dragging inside
  moves them; one undo step each. Corners win over points, points over edges,
  edges over segments.
- Commands: vector.edit.bounds, vector.edit.resize, vector.edit.rotate,
  vector.edit.transform; object.flipH/V and the 90°/180° rotations act on the
  selected points while editing (unless ids are given).
- Design panel in edit mode: W/H for the selected points next to X/Y (the
  layer's dimensions are hidden while points are selected).
- Point snapping for dragged points and handles and both pens: points and
  segment midpoints of this and other vectors, the usual layer targets and
  the pixel grid, with guides and a marker on the point landed on; Ctrl/Cmd
  turns object snapping off. Snap code generalised in snap.rs (Targets spans).
- Fix: handle/bend drags read positions in the gesture snapshot's coordinates,
  so handles no longer lag when the preview re-fits the vector.
- Shared resize math (tools::resized_box) and handle hit-testing for layer
  and point boxes; canvas draws both boxes through one helper.
- Tests in vectoredit/transform_tests.rs (incl. junk sweep for the
  edit-aware commands).

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
BFlat
2026-10-10 10:44:12 +07:00
committed by GitHub
co-authored by Claude Opus 5.5
parent 5f54fecca2
commit 8dff0089e5
16 changed files with 1245 additions and 238 deletions
Download Patch File Download Diff File Expand all files Collapse all files
crates/engine/src/cmd/arrange.rs
+21 -5
View File
@@ -27,11 +27,17 @@ pub fn specs() -> Vec<CommandSpec> {
spec!("arrange.forward", "Bring forward", "{ids?}", true, |s, p| zorder(s, p, Z::Forward)),
spec!("arrange.backward", "Send backward", "{ids?}", true, |s, p| zorder(s, p, Z::Backward)),
spec!("arrange.back", "Send to back", "{ids?}", true, |s, p| zorder(s, p, Z::Back)),
spec!("object.flipH", "Flip horizontal", "{ids?}", true, |s, p| flip(s, p, true)),
spec!("object.flipV", "Flip vertical", "{ids?}", true, |s, p| flip(s, p, false)),
spec!("object.rotate180", "Rotate 180°", "{ids?}", true, |s, p| rotate_by(s, p, 180.0)),
spec!("object.rotateLeft", "Rotate 90° left", "{ids?}", true, |s, p| rotate_by(s, p, 90.0)),
spec!("object.rotateRight", "Rotate 90° right", "{ids?}", true, |s, p| rotate_by(s, p, -90.0)),
spec!("object.flipH", "Flip horizontal", "{ids?} (in vector edit mode without ids: the selected points)", true, |s, p| flip(s, p, true)),
spec!("object.flipV", "Flip vertical", "{ids?} (in vector edit mode without ids: the selected points)", true, |s, p| flip(s, p, false)),
spec!("object.rotate180", "Rotate 180°", "{ids?} (in vector edit mode without ids: the selected points)", true, |s, p| rotate_by(
s, p, 180.0
)),
spec!("object.rotateLeft", "Rotate 90° left", "{ids?} (in vector edit mode without ids: the selected points)", true, |s, p| rotate_by(
s, p, 90.0
)),
spec!("object.rotateRight", "Rotate 90° right", "{ids?} (in vector edit mode without ids: the selected points)", true, |s, p| {
rotate_by(s, p, -90.0)
}),
spec!("transform.move", "Move", "{ids?, dx, dy} (page units)", true, |s, p| {
let (dx, dy) = (num_or(p, "dx", 0.0), num_or(p, "dy", 0.0));
let ids = req_targets("transform.move", s, p)?;
@@ -290,6 +296,13 @@ fn zorder(s: &mut Session, p: &Value, z: Z) -> Result<Value> {
}
fn flip(s: &mut Session, p: &Value, horizontal: bool) -> Result<Value> {
// Editing a vector with points selected: flip them in their box.
let points = crate::vectoredit::transform::transform_in_edit_mode(s, p, |b| {
if horizontal { b.onto(b.width, 0.0, 0.0, b.height) } else { b.onto(0.0, b.height, b.width, 0.0) }
});
if let Some(r) = points {
return r;
}
let ids = req_targets("flip", s, p)?;
let doc = s.doc_mut()?;
let ids = roots(doc, &ids);
@@ -304,6 +317,9 @@ fn flip(s: &mut Session, p: &Value, horizontal: bool) -> Result<Value> {
}
fn rotate_by(s: &mut Session, p: &Value, deg: f64) -> Result<Value> {
if let Some(r) = crate::vectoredit::transform::transform_in_edit_mode(s, p, |b| figcraft_geom::rotate_about(Affine::IDENTITY, b.center(), deg)) {
return r;
}
let ids = req_targets("rotate", s, p)?;
let doc = s.doc_mut()?;
let ids = roots(doc, &ids);