V: Power Zoom by press-and-hold with the Hand tool

Co-Authored-By: Claude Opus 5.5 <[email protected]>

ROADMAP.md

@@ -87,7 +87,7 @@ DesignCraft aims at full Adobe InDesign parity — and to be better: faster, ope
 - Move table rows and columns (`table.moveRow`, `table.moveColumn`, Table panel buttons; dragging on the canvas isn't there yet).
 - Object States (`states.create/show/rename/release/list`, Object States panel): multi-state objects show one state on screen and in PDF.
 - Buttons (`button.set/clear/list`, Buttons and Forms panel): go to page / next / previous / first / last / URL as PDF link annotations. Form fields need AcroForm support the PDF writer lacks.
-- Power Zoom (Hand tool, Alt-press): zoom out to the spread, aim the red view rectangle, release to zoom back in there. InDesign triggers it by press-and-hold instead.
+- Power Zoom (Hand tool: press and hold still for half a second, or Alt-press): zoom out to the spread, aim the red view rectangle, release to zoom back in there.
 - Graphic cells (`table.placeGraphic`, `table.textCell`, Table › Convert Cell Type, Table panel): images in table cells, fitted or filled, clipped to the cell on screen and in PDF.
 - Live Distribute (Space while dragging a selection handle; `transform.resize {distribute}`): objects keep their size and spread with the bounds.
 - Liquid Layout (`liquid.pageRule/object`, `guide.liquid`, `layout.createAlternate`, Liquid Layout panel): scale / re-center / guide-based / object-based page rules applied on page resize and Document Setup; dashed liquid guides; alternate layouts as resized page copies in a named section. Alternate layouts aren't linked to their source.

crates/ui-egui/src/canvas.rs

@@ -1362,6 +1362,26 @@ fn handle_input(app: &mut DesignApp, ui: &mut egui::Ui, resp: &egui::Response, r
     {
         events.push(PointerEvent { kind: PointerKind::Drag, pos: pos(p), mods: m });
     }
+    // Power Zoom: holding the Hand tool still for half a second turns the press into one.
+    let hold_id = egui::Id::new(("canvas_hold", app.pane));
+    if down && !released && app.session.tool_id() == "hand" && !m.alt {
+        let (now, origin_pos) = ui.input(|i| (i.time, i.pointer.press_origin()));
+        let (start, fired): (f64, bool) = ui.data(|d| d.get_temp(hold_id)).unwrap_or((now, false));
+        let still = origin_pos.zip(latest).is_some_and(|(o, l)| (o - l).length() < 3.0);
+        if !fired && still && now - start >= 0.5 {
+            let p = pos(latest.unwrap_or(rect.center()));
+            events.push(PointerEvent { kind: PointerKind::Up, pos: p, mods: m });
+            events.push(PointerEvent { kind: PointerKind::Down, pos: p, mods: Mods { alt: true, ..m } });
+            ui.data_mut(|d| d.insert_temp(hold_id, (start, true)));
+        } else {
+            ui.data_mut(|d| d.insert_temp(hold_id, (start, fired)));
+            if !fired {
+                ui.ctx().request_repaint_after(std::time::Duration::from_millis(100));
+            }
+        }
+    } else {
+        ui.data_mut(|d| d.remove::<(f64, bool)>(hold_id));
+    }
     if down && released {
         let p = latest.unwrap_or(rect.center());
         events.push(PointerEvent { kind: PointerKind::Up, pos: pos(p), mods: m });

crates/ui-egui/src/menus.rs

@@ -2032,6 +2032,49 @@ mod tests {
         assert_eq!(run_ui(&mut app, "view.rotateSpread", &json!({"angle": 0})).unwrap().unwrap(), json!(0));
     }
 
+    #[test]
+    fn hand_tool_hold_starts_power_zoom() {
+        let mut app = crate::DesignApp::new(designcraft_engine::Session::new(), crate::Services::default());
+        app.session.execute("file.new", &json!({})).unwrap();
+        let ctx = egui::Context::default();
+        let frame = |app: &mut crate::DesignApp, t: f64, events: Vec<egui::Event>| {
+            let input = egui::RawInput {
+                screen_rect: Some(egui::Rect::from_min_size(egui::Pos2::ZERO, egui::vec2(1400.0, 900.0))),
+                time: Some(t),
+                events,
+                ..Default::default()
+            };
+            let mut out = ctx.run_ui(input, |ui| {
+                app.logic(&ui.ctx().clone());
+                app.ui(ui);
+            });
+            out.textures_delta.clear();
+        };
+        frame(&mut app, 0.0, vec![]);
+        frame(&mut app, 0.05, vec![]);
+        app.select_tool("hand");
+        let r = app.canvas_rect.unwrap();
+        let p = r.center();
+        let z0 = app.view().unwrap().zoom;
+        frame(&mut app, 0.1, vec![egui::Event::PointerMoved(p)]);
+        frame(
+            &mut app,
+            0.2,
+            vec![egui::Event::PointerButton { pos: p, button: egui::PointerButton::Primary, pressed: true, modifiers: Default::default() }],
+        );
+        frame(&mut app, 0.4, vec![]);
+        assert!(app.power_zoom.is_none(), "not yet");
+        frame(&mut app, 0.8, vec![]);
+        assert!(app.power_zoom.is_some(), "holding still starts Power Zoom");
+        frame(
+            &mut app,
+            0.9,
+            vec![egui::Event::PointerButton { pos: p, button: egui::PointerButton::Primary, pressed: false, modifiers: Default::default() }],
+        );
+        assert!(app.power_zoom.is_none());
+        assert!((app.view().unwrap().zoom - z0).abs() < 1e-9, "back at the zoom it started from");
+    }
+
     #[test]
     fn panels_float_and_dock() {
         let mut app = crate::DesignApp::new(designcraft_engine::Session::new(), crate::Services::default());

docs/parity.md

@@ -11,7 +11,7 @@ Each row of the InDesign feature catalogue is scored **D** (done), **P** (partia
 |---|---|---|---|---|---|
 | P0 | 102 | 100 | 2 | 0 | 99% |
 | P1 | 97 | 94 | 3 | 0 | 98% |
-| P2 | 76 | 50 | 26 | 0 | 83% |
+| P2 | 76 | 51 | 25 | 0 | 84% |
 
 | Area | Parity |
 |---|---|
@@ -31,7 +31,7 @@ Each row of the InDesign feature catalogue is scored **D** (done), **P** (partia
 | Interactivity & digital | 90% |
 | Output & production | 82% |
 | XML & automation | 83% |
-| View & navigation | 95% |
+| View & navigation | 96% |
 | Undo, history, saving | 100% |
 | Accessibility | 90% |
 
@@ -297,7 +297,7 @@ Open P0 items: Vector/page formats (PDF/AI/SVG/EPS place), Export to PDF (print)
 | XML & automation | Snippets | P1 | D |
 | XML & automation | Object Library | P2 | D |
 | View & navigation | Zoom commands | P0 | D |
-| View & navigation | Power Zoom | P2 | P |
+| View & navigation | Power Zoom | P2 | D |
 | View & navigation | Animated/scrubby zoom | P1 | D |
 | View & navigation | Screen modes | P0 | D |
 | View & navigation | Overprint preview | P1 | D |