feat: animate the bubble like face id

src/agent/bubblecontroller.cpp

@@ -10,9 +10,10 @@
 
 namespace
 {
-// How long a result stays up before the bubble closes. Long enough to read,
-// short enough not to be in the way.
-constexpr int SuccessHoldMs = 900;
+// How long a result stays up before the bubble closes: long enough to read
+// (on success after the face has resolved, about a second), short enough not
+// to be in the way.
+constexpr int SuccessHoldMs = 1500;
 constexpr int FailureHoldMs = 1700;
 constexpr int LockoutHoldMs = 3000;
 // A scan that never reports back (the daemon went away half way) must not

src/agent/qml/Bubble.qml

@@ -74,14 +74,7 @@ Item {
     // The phase on screen. Closing keeps the last one, so the tick does not
     // turn back into a face on its way out.
     property string shownPhase: "idle"
-    onPhaseChanged: {
-        if (phase !== "hidden") {
-            shownPhase = phase
-        }
-        if (phase === "failure" && minimal) {
-            pillShake.restart()
-        }
-    }
+    onPhaseChanged: if (phase !== "hidden") shownPhase = phase
 
     // What the face shows.
     readonly property string glyphMode: shownPhase === "scanning" ? (bubble.faceSeen ? "tracking" : "scanning") : shownPhase
@@ -246,6 +239,11 @@ Item {
                 anchors.rightMargin: 14
                 lineWidth: 2.4
                 mode: root.glyphMode === "lockout" ? "failure" : root.glyphMode
+                onSettled: ok => {
+                    if (!ok) {
+                        pillShake.restart()
+                    }
+                }
                 opacity: 1 - 0.35 * root.pulse
                 scale: 1 - 0.03 * root.pulse
             }

src/agent/qml/FaceGlyph.qml

@@ -5,13 +5,19 @@
 // from a video, so it is sharp at any size and every part can move on its own.
 //
 //   idle      still
-//   scanning  the face looks around inside the brackets, the brackets breathe
+//   scanning  the face turns its head around inside the brackets, the
+//             brackets breathe
 //   tracking  a face is in view: it looks straight ahead, brackets close in
-//   success   the face gives way to a tick, the brackets turn green
-//   failure   it shakes its head and the smile goes flat
+//   success   the rings (below), then a tick in the one that is left
+//   failure   it turns red and shakes its head, as on iOS
 //   lockout   a lock instead of a face
+//
+// The rings are Face ID's in the Dynamic Island: the face gives way to two
+// crossed rings that tumble in 3D with a soft glow, slow down, and land flat
+// facing forward; one fades, the other sharpens, and the tick draws inside it.
 
 import QtQuick
+import QtQuick.Effects
 import QtQuick.Shapes
 
 Item {
@@ -21,25 +27,41 @@ Item {
     property color color: Theme.textPrimary
     property real lineWidth: width * 0.055
 
+    // The verdict is showing: after the rings on success, at once on failure.
+    signal settled(bool success)
+
     readonly property real u: width / 100
     readonly property bool looking: mode === "scanning"
     readonly property color bracketColor: mode === "success" ? Theme.success
                                         : mode === "failure" ? Theme.failure
                                         : root.color
 
-    // -- where the face looks, while it looks around
+    // -- the head turning round while it looks, as Face ID's does. The
+    // features sit on a head at different depths (the nose in front, the
+    // mouth further back) and turn with it, so the nose swings further than
+    // the eyes and the face narrows on the side it turns away from.
     property real lookAngle: 0
     NumberAnimation on lookAngle {
         running: root.looking
         from: 0
         to: 2 * Math.PI
-        duration: 2400
+        duration: 2000
         loops: Animation.Infinite
     }
     property real lookAmount: root.looking ? 1 : 0
-    Behavior on lookAmount { NumberAnimation { duration: 300; easing.type: Easing.InOutQuad } }
-    readonly property real lookX: 3.5 * u * Math.cos(lookAngle) * lookAmount
-    readonly property real lookY: 2.2 * u * Math.sin(lookAngle) * lookAmount
+    Behavior on lookAmount { NumberAnimation { duration: 350; easing.type: Easing.InOutQuad } }
+    readonly property real yaw: 0.34 * Math.cos(lookAngle) * lookAmount
+    readonly property real pitch: 0.2 * Math.sin(lookAngle) * lookAmount
+
+    // A point of the face, x and y from the middle and z towards the viewer
+    // (all in hundredths of the glyph), turned with the head and drawn flat.
+    function faceX(x, y, z) {
+        return (50 + x * Math.cos(yaw) + z * Math.sin(yaw)) * u
+    }
+    function faceY(x, y, z) {
+        const depth = z * Math.cos(yaw) - x * Math.sin(yaw)
+        return (50 + y * Math.cos(pitch) - depth * Math.sin(pitch)) * u
+    }
 
     // -- the smile, flat on failure
     property real smile: mode === "failure" ? 0 : 1
@@ -54,13 +76,150 @@ Item {
         NumberAnimation { from: 1; to: 0; duration: 700; easing.type: Easing.InOutSine }
         onRunningChanged: if (!running) root.breathe = 0
     }
-    readonly property real bracketScale: mode === "tracking" ? 0.9
-                                       : mode === "success" ? 1.04
-                                       : 1 - 0.04 * breathe
+    readonly property real bracketScale: mode === "tracking" ? 0.9 : 1 - 0.04 * breathe
+
+    // -- the rings, on one timeline
+    // Through the success, 0 to 1.
+    property real t: 0
+    property real tick: 0
+
+    function smooth(from, to, p) {
+        const x = Math.max(0, Math.min(1, (p - from) / (to - from)))
+        return x * x * (3 - 2 * x)
+    }
+    // How far the rings have turned at p: speeding up from rest, fastest a
+    // quarter of the way in, then settling softly, facing forward.
+    function turned(p) {
+        return p * p * (10 - p * (20 - p * (15 - 4 * p)))
+    }
+
+    readonly property real faceGone: smooth(0, 0.22, t)
+    readonly property real ringsIn: smooth(0.04, 0.26, t)
+    readonly property real turn: turned(Math.min(1, t / 0.7))
+    readonly property real ringSize: 40 * (0.7 + 0.3 * ringsIn)
+    // One ring turns over once and round a quarter, ending flat; the other
+    // crosses it, tilted, and fades as they land.
+    readonly property var ringA: ring(0, -360 * turn, 90 * turn, ringSize)
+    readonly property var ringB: ring(70 + 360 * turn, 30 + 360 * turn, -90 * turn, ringSize)
+    // Gone by the time the tick starts, so it draws in a clean ring.
+    readonly property real ringBShown: 1 - smooth(0.36, 0.58, t)
+    // How dim the far half is: more the more a ring is tilted, none flat.
+    readonly property real ringABack: 1 - 0.6 * tilt(ringA)
+    readonly property real ringBBack: 1 - 0.6 * tilt(ringB)
+    // Sharpens as it settles and on while the tick draws, not in one go.
+    readonly property real glow: 1 - smooth(0.42, 0.75, t)
+
+    onModeChanged: {
+        succeed.stop()
+        drawTick.stop()
+        t = 0
+        tick = 0
+        // From mode itself: bindings on it may not have caught up yet.
+        if (mode === "failure") {
+            shakeAnimation.restart()
+            settled(false)
+        } else if (mode === "success") {
+            succeed.start()
+        }
+    }
+
+    SequentialAnimation {
+        id: succeed
+        ParallelAnimation {
+            NumberAnimation { target: root; property: "t"; from: 0; to: 1; duration: 850 }
+            // The tick starts as the ring comes to rest, so the one motion
+            // runs on into the other.
+            SequentialAnimation {
+                PauseAnimation { duration: 470 }
+                ScriptAction { script: drawTick.start() }
+            }
+        }
+        ScriptAction { script: root.settled(true) }
+    }
+    NumberAnimation {
+        id: drawTick
+        target: root
+        property: "tick"
+        to: 1
+        duration: 260
+        easing.type: Easing.OutQuad
+    }
+
+    // A ring of the given size turned in 3D (degrees about x, then y, then
+    // z), as points x and y from the middle and z towards the viewer.
+    function ring(ax, ay, az, radius) {
+        const d = Math.PI / 180
+        const ca = Math.cos(ax * d), sa = Math.sin(ax * d)
+        const cb = Math.cos(ay * d), sb = Math.sin(ay * d)
+        const cg = Math.cos(az * d), sg = Math.sin(az * d)
+        const points = []
+        for (let i = 0; i < 64; ++i) {
+            const phi = 2 * Math.PI * i / 64
+            let x = radius * Math.cos(phi)
+            let y = radius * Math.sin(phi) * ca
+            let z = radius * Math.sin(phi) * sa
+            const x1 = x * cb + z * sb
+            z = z * cb - x * sb
+            x = x1
+            const x2 = x * cg - y * sg
+            y = x * sg + y * cg
+            x = x2
+            points.push([x, y, z])
+        }
+        return points
+    }
+    // How far a ring leans out of the screen, 0 flat to 1 edge on.
+    function tilt(points) {
+        let most = 0
+        for (let i = 0; i < points.length; ++i) {
+            most = Math.max(most, Math.abs(points[i][2]))
+        }
+        return points.length ? most / Math.max(1, Math.hypot(points[0][0], points[0][1], points[0][2])) : 0
+    }
+    function onScreen(p) {
+        return Qt.point((50 + p[0]) * u, (50 + p[1]) * u)
+    }
+    // The half of a ring in front of the middle, or behind it, in one piece
+    // and reaching one point into the other half so the two meet.
+    function half(points, front) {
+        const n = points.length
+        const inFront = i => points[(i + n) % n][2] >= -1e-6
+        let start = -1
+        for (let i = 0; i < n; ++i) {
+            if (inFront(i) === front && inFront(i - 1) !== front) {
+                start = i
+                break
+            }
+        }
+        const out = []
+        if (start < 0) {
+            if (inFront(0) === front) {
+                for (let i = 0; i <= n; ++i) {
+                    out.push(onScreen(points[i % n]))
+                }
+            }
+            return out
+        }
+        out.push(onScreen(points[(start + n - 1) % n]))
+        let i = start
+        while (inFront(i) === front && i < start + n) {
+            out.push(onScreen(points[i % n]))
+            ++i
+        }
+        out.push(onScreen(points[i % n]))
+        return out
+    }
+    function whole(points) {
+        const out = points.map(onScreen)
+        out.push(out[0])
+        return out
+    }
+    function faded(c, alpha) {
+        return Qt.rgba(c.r, c.g, c.b, alpha)
+    }
 
     // -- a shake of the head
     property real shake: 0
-    onModeChanged: if (mode === "failure") shakeAnimation.restart()
     SequentialAnimation {
         id: shakeAnimation
         NumberAnimation { target: root; property: "shake"; to: -9; duration: 55; easing.type: Easing.OutQuad }
@@ -76,46 +235,113 @@ Item {
         anchors.fill: parent
         transform: Translate { x: root.shake * root.u }
 
-        // Brackets
-        Shape {
-            id: brackets
+        // Brackets, giving way to the rings
+        Item {
             anchors.fill: parent
-            preferredRendererType: Shape.CurveRenderer
-            scale: root.bracketScale
-            Behavior on scale { NumberAnimation { duration: 260; easing.type: Easing.OutBack } }
+            opacity: 1 - root.faceGone
+            scale: 1 - 0.15 * root.faceGone
 
-            component Bracket: ShapePath {
-                strokeColor: root.bracketColor
-                strokeWidth: root.lineWidth
-                fillColor: "transparent"
-                capStyle: ShapePath.RoundCap
-                joinStyle: ShapePath.RoundJoin
-                Behavior on strokeColor { ColorAnimation { duration: 220 } }
+            Shape {
+                id: brackets
+                anchors.fill: parent
+                preferredRendererType: Shape.CurveRenderer
+                scale: root.bracketScale
+                Behavior on scale { NumberAnimation { duration: 260; easing.type: Easing.OutBack } }
+
+                component Bracket: ShapePath {
+                    strokeColor: root.bracketColor
+                    strokeWidth: root.lineWidth
+                    fillColor: "transparent"
+                    capStyle: ShapePath.RoundCap
+                    joinStyle: ShapePath.RoundJoin
+                    Behavior on strokeColor { ColorAnimation { duration: 220 } }
+                }
+
+                Bracket {
+                    startX: 6 * root.u; startY: 30 * root.u
+                    PathLine { x: 6 * root.u; y: 19 * root.u }
+                    PathQuad { x: 19 * root.u; y: 6 * root.u; controlX: 6 * root.u; controlY: 6 * root.u }
+                    PathLine { x: 30 * root.u; y: 6 * root.u }
+                }
+                Bracket {
+                    startX: 70 * root.u; startY: 6 * root.u
+                    PathLine { x: 81 * root.u; y: 6 * root.u }
+                    PathQuad { x: 94 * root.u; y: 19 * root.u; controlX: 94 * root.u; controlY: 6 * root.u }
+                    PathLine { x: 94 * root.u; y: 30 * root.u }
+                }
+                Bracket {
+                    startX: 94 * root.u; startY: 70 * root.u
+                    PathLine { x: 94 * root.u; y: 81 * root.u }
+                    PathQuad { x: 81 * root.u; y: 94 * root.u; controlX: 94 * root.u; controlY: 94 * root.u }
+                    PathLine { x: 70 * root.u; y: 94 * root.u }
+                }
+                Bracket {
+                    startX: 30 * root.u; startY: 94 * root.u
+                    PathLine { x: 19 * root.u; y: 94 * root.u }
+                    PathQuad { x: 6 * root.u; y: 81 * root.u; controlX: 6 * root.u; controlY: 94 * root.u }
+                    PathLine { x: 6 * root.u; y: 70 * root.u }
+                }
+            }
+        }
+
+        // The rings: a soft glow under them, their far halves dimmed, the near
+        // halves on top.
+        Item {
+            anchors.fill: parent
+            visible: root.t > 0
+            opacity: root.ringsIn
+
+            Shape {
+                anchors.fill: parent
+                opacity: 0.8 * root.glow
+                layer.enabled: parent.visible && root.glow > 0
+                layer.effect: MultiEffect {
+                    blurEnabled: true
+                    blur: 1
+                    blurMax: 20
+                }
+
+                ShapePath {
+                    strokeColor: root.bracketColor
+                    strokeWidth: root.lineWidth * 1.6
+                    fillColor: "transparent"
+                    PathPolyline { path: root.whole(root.ringA) }
+                }
+                ShapePath {
+                    strokeColor: root.faded(root.bracketColor, root.ringBShown)
+                    strokeWidth: root.lineWidth * 1.6
+                    fillColor: "transparent"
+                    PathPolyline { path: root.whole(root.ringB) }
+                }
             }
 
-            Bracket {
-                startX: 6 * root.u; startY: 30 * root.u
-                PathLine { x: 6 * root.u; y: 19 * root.u }
-                PathQuad { x: 19 * root.u; y: 6 * root.u; controlX: 6 * root.u; controlY: 6 * root.u }
-                PathLine { x: 30 * root.u; y: 6 * root.u }
-            }
-            Bracket {
-                startX: 70 * root.u; startY: 6 * root.u
-                PathLine { x: 81 * root.u; y: 6 * root.u }
-                PathQuad { x: 94 * root.u; y: 19 * root.u; controlX: 94 * root.u; controlY: 6 * root.u }
-                PathLine { x: 94 * root.u; y: 30 * root.u }
-            }
-            Bracket {
-                startX: 94 * root.u; startY: 70 * root.u
-                PathLine { x: 94 * root.u; y: 81 * root.u }
-                PathQuad { x: 81 * root.u; y: 94 * root.u; controlX: 94 * root.u; controlY: 94 * root.u }
-                PathLine { x: 70 * root.u; y: 94 * root.u }
-            }
-            Bracket {
-                startX: 30 * root.u; startY: 94 * root.u
-                PathLine { x: 19 * root.u; y: 94 * root.u }
-                PathQuad { x: 6 * root.u; y: 81 * root.u; controlX: 6 * root.u; controlY: 94 * root.u }
-                PathLine { x: 6 * root.u; y: 70 * root.u }
+            Shape {
+                anchors.fill: parent
+                preferredRendererType: Shape.CurveRenderer
+
+                component RingPath: ShapePath {
+                    fillColor: "transparent"
+                    strokeWidth: root.lineWidth
+                    capStyle: ShapePath.RoundCap
+                    joinStyle: ShapePath.RoundJoin
+                }
+
+                RingPath {
+                    strokeColor: root.faded(root.bracketColor, root.ringABack)
+                    PathPolyline { path: root.half(root.ringA, false) }
+                }
+                RingPath {
+                    strokeColor: root.faded(root.bracketColor, root.ringBBack * root.ringBShown)
+                    PathPolyline { path: root.half(root.ringB, false) }
+                }
+                RingPath {
+                    strokeColor: root.faded(root.bracketColor, root.ringBShown)
+                    PathPolyline { path: root.half(root.ringB, true) }
+                }
+                RingPath {
+                    strokeColor: root.bracketColor
+                    PathPolyline { path: root.half(root.ringA, true) }
+                }
             }
         }
 
@@ -124,14 +350,14 @@ Item {
             id: face
             anchors.fill: parent
             preferredRendererType: Shape.CurveRenderer
-            opacity: root.mode === "success" || root.mode === "lockout" ? 0 : 1
-            scale: root.mode === "success" ? 0.6 : 1
-            Behavior on opacity { NumberAnimation { duration: 180 } }
-            Behavior on scale { NumberAnimation { duration: 220; easing.type: Easing.InQuad } }
-            transform: Translate { x: root.lookX; y: root.lookY }
+            // Gives way to the rings, and to the lock.
+            property real shown: root.mode === "lockout" ? 0 : 1
+            Behavior on shown { NumberAnimation { duration: 180 } }
+            opacity: shown * (1 - root.faceGone)
+            scale: 1 - 0.2 * root.faceGone
 
             component Feature: ShapePath {
-                strokeColor: root.mode === "failure" ? Theme.failure : root.color
+                strokeColor: root.bracketColor
                 strokeWidth: root.lineWidth
                 fillColor: "transparent"
                 capStyle: ShapePath.RoundCap
@@ -141,32 +367,42 @@ Item {
 
             // Eyes
             Feature {
-                startX: 34 * root.u; startY: 36 * root.u
-                PathLine { x: 34 * root.u; y: 45 * root.u }
+                startX: root.faceX(-16, -14, 26); startY: root.faceY(-16, -14, 26)
+                PathLine { x: root.faceX(-16, -5, 26); y: root.faceY(-16, -5, 26) }
             }
             Feature {
-                startX: 66 * root.u; startY: 36 * root.u
-                PathLine { x: 66 * root.u; y: 45 * root.u }
+                startX: root.faceX(16, -14, 26); startY: root.faceY(16, -14, 26)
+                PathLine { x: root.faceX(16, -5, 26); y: root.faceY(16, -5, 26) }
             }
             // Nose, with its little hook
             Feature {
-                startX: 50 * root.u; startY: 37 * root.u
-                PathLine { x: 50 * root.u; y: 56 * root.u }
-                PathQuad { x: 45 * root.u; y: 61 * root.u; controlX: 50 * root.u; controlY: 61 * root.u }
+                startX: root.faceX(0, -13, 29); startY: root.faceY(0, -13, 29)
+                PathLine { x: root.faceX(0, 6, 37); y: root.faceY(0, 6, 37) }
+                PathQuad {
+                    x: root.faceX(-5, 11, 31); y: root.faceY(-5, 11, 31)
+                    controlX: root.faceX(0, 11, 35); controlY: root.faceY(0, 11, 35)
+                }
             }
             // Mouth
             Feature {
-                startX: 35 * root.u; startY: 70 * root.u
-                PathQuad { x: 65 * root.u; y: 70 * root.u; controlX: 50 * root.u; controlY: (70 + 11 * root.smile) * root.u }
+                startX: root.faceX(-15, 20, 21); startY: root.faceY(-15, 20, 21)
+                PathQuad {
+                    x: root.faceX(15, 20, 21); y: root.faceY(15, 20, 21)
+                    controlX: root.faceX(0, 20 + 11 * root.smile, 24); controlY: root.faceY(0, 20 + 11 * root.smile, 24)
+                }
             }
         }
 
+        // The tick, drawn inside the ring as it comes to rest
         Checkmark {
             anchors.fill: parent
+            scale: 0.75
+            transform: Translate { x: 1.5 * root.u }
             color: Theme.success
-            lineWidth: root.lineWidth * 1.15
-            progress: root.mode === "success" ? 1 : 0
-            Behavior on progress { NumberAnimation { duration: 380; easing.type: Easing.OutCubic } }
+            lineWidth: root.lineWidth / 0.75
+            progress: root.tick
+            // Its first dot fades in rather than popping up.
+            opacity: Math.min(1, root.tick * 8)
         }
 
         LockGlyph {