Take input per kind, rather than deciding it once a frame

Reviewing this against the process we agreed: the title claimed per-kind
routing and the code decided it once for the whole frame. A scroll and a
click in the same frame both went to the button, because a widget that
matched any momentary sense consumed everything.

Consumption is now removing an input from the cursor the layers below see.
`CursorSense::take` states what each sense takes -- exhaustively, so a new
sense has to answer the question rather than inherit a default -- and
`is_momentary` is gone with the enumeration it was written on. `should_run`
and consumption share one matcher instead of two copies of the table.

Two tests, each checked to fail without the change: a click and a scroll in
one frame reach different widgets, and leaving a widget still ends its hover.
The second is a regression this review caught in its own first draft, where
the skip condition used `is_off`, which counts `End` -- the one frame a
hover-end handler has to run on.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

Cargo.lock

@@ -234,18 +234,18 @@ dependencies = [
 
 [[package]]
 name = "bit-set"
-version = "0.10.0"
+version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "09ec2f926cc3060f09db9ebc5b52823d85268d24bb917e472c0c4bea35780a7d"
+checksum = "08807e080ed7f9d5433fa9b275196cfc35414f66a0c79d864dc51a0d825231a3"
 dependencies = [
  "bit-vec",
 ]
 
 [[package]]
 name = "bit-vec"
-version = "0.9.1"
+version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b71798fca2c1fe1086445a7258a4bc81e6e49dcd24c8d0dd9a1e57395b603f51"
+checksum = "5e764a1d40d510daf35e07be9eb06e75770908c27d411ee6c92109c9840eaaf7"
 
 [[package]]
 name = "bit_field"
@@ -274,6 +274,12 @@ dependencies = [
  "core2",
 ]
 
+[[package]]
+name = "block"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0d8c1fef690941d3e7788d328517591fecc684c084084702d6ff1641e993699a"
+
 [[package]]
 name = "block2"
 version = "0.5.1"
@@ -283,15 +289,6 @@ dependencies = [
  "objc2 0.5.2",
 ]
 
-[[package]]
-name = "block2"
-version = "0.6.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cdeb9d870516001442e364c5220d3574d2da8dc765554b4a617230d33fa58ef5"
-dependencies = [
- "objc2 0.6.4",
-]
-
 [[package]]
 name = "built"
 version = "0.8.0"
@@ -394,9 +391,9 @@ checksum = "9330f8b2ff13f34540b44e946ef35111825727b38d33286ef986142615121801"
 
 [[package]]
 name = "cfg_aliases"
-version = "0.2.2"
+version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f079e83a288787bcd14a6aea84cee5c87a67c5a3e660c30f557a3d24761b3527"
+checksum = "613afe47fcd5fac7ccf1db93babcb082c5994d996f20b8b159f2ad1658eb5724"
 
 [[package]]
 name = "clipboard-win"
@@ -409,9 +406,9 @@ dependencies = [
 
 [[package]]
 name = "codespan-reporting"
-version = "0.13.1"
+version = "0.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "af491d569909a7e4dee0ad7db7f5341fef5c614d5b8ec8cf765732aba3cff681"
+checksum = "fe6d2e5af09e8c8ad56c969f2157a3d4238cebc7c55f0a517728c38f7b200f81"
 dependencies = [
  "serde",
  "termcolor",
@@ -453,6 +450,16 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "core-foundation"
+version = "0.10.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b2a6cd9ae233e7f62ba4e9353e81a88df7fc8a5987b8d445b4d90c879bd156f6"
+dependencies = [
+ "core-foundation-sys",
+ "libc",
+]
+
 [[package]]
 name = "core-foundation-sys"
 version = "0.8.7"
@@ -466,8 +473,8 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c07782be35f9e1140080c6b96f0d44b739e2278479f64e02fdab4e32dfd8b081"
 dependencies = [
  "bitflags 1.3.2",
- "core-foundation",
+ "core-foundation 0.9.4",
- "core-graphics-types",
+ "core-graphics-types 0.1.3",
  "foreign-types",
  "libc",
 ]
@@ -479,7 +486,18 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "45390e6114f68f718cc7a830514a96f903cccd70d02a8f6d9f643ac4ba45afaf"
 dependencies = [
  "bitflags 1.3.2",
- "core-foundation",
+ "core-foundation 0.9.4",
+ "libc",
+]
+
+[[package]]
+name = "core-graphics-types"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3d44a101f213f6c4cdc1853d4b78aef6db6bdfa3468798cc1d9912f4735013eb"
+dependencies = [
+ "bitflags 2.10.0",
+ "core-foundation 0.10.1",
  "libc",
 ]
 
@@ -721,6 +739,15 @@ version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "77ce24cb58228fbb8aa041425bb1050850ac19177686ea6e0f41a70416f56fdb"
 
+[[package]]
+name = "font-types"
+version = "0.10.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "39a654f404bbcbd48ea58c617c2993ee91d1cb63727a37bf2323a4edeed1b8c5"
+dependencies = [
+ "bytemuck",
+]
+
 [[package]]
 name = "font-types"
 version = "0.12.4"
@@ -744,7 +771,7 @@ dependencies = [
  "objc2-core-text",
  "objc2-foundation 0.3.2",
  "parlance",
- "read-fonts",
+ "read-fonts 0.41.0",
  "roxmltree",
  "smallvec",
  "windows",
@@ -779,30 +806,6 @@ version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "aa9a19cbb55df58761df49b23516a86d432839add4af60fc256da840f66ed35b"
 
-[[package]]
-name = "futures-core"
-version = "0.3.34"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "92d699e522242e69e3003b94ecc1f960f3a5e015aa7c5d7486e65ad01dd94f5e"
-
-[[package]]
-name = "futures-task"
-version = "0.3.34"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cd417de3d1d015fc3bfd2b1ea46dfc7bab72ef86f1cc7cc9c78e728b34a6d1fd"
-
-[[package]]
-name = "futures-util"
-version = "0.3.34"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0d50a92467f8ba5dd6e3ee5d4bd04d73ab2e4e1c44474a0674821dfce14b79bc"
-dependencies = [
- "futures-core",
- "futures-task",
- "pin-project-lite",
- "slab",
-]
-
 [[package]]
 name = "fxhash"
 version = "0.2.1"
@@ -857,9 +860,9 @@ dependencies = [
 
 [[package]]
 name = "glow"
-version = "0.17.0"
+version = "0.16.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "29038e1c483364cc6bb3cf78feee1816002e127c331a1eec55a4d202b9e1adb5"
+checksum = "c5e5ea60d70410161c8bf5da3fdfeaa1c72ed2c15f8bbb9d19fe3a4fad085f08"
 dependencies = [
  "js-sys",
  "slotmap",
@@ -890,6 +893,26 @@ dependencies = [
  "windows",
 ]
 
+[[package]]
+name = "gpu-descriptor"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b89c83349105e3732062a895becfc71a8f921bb71ecbbdd8ff99263e3b53a0ca"
+dependencies = [
+ "bitflags 2.10.0",
+ "gpu-descriptor-types",
+ "hashbrown 0.15.5",
+]
+
+[[package]]
+name = "gpu-descriptor-types"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fdf242682df893b86f33a73828fb09ca4b2d3bb6cc95249707fc684d27484b91"
+dependencies = [
+ "bitflags 2.10.0",
+]
+
 [[package]]
 name = "half"
 version = "2.7.1"
@@ -910,7 +933,7 @@ checksum = "c03d949a14aa089bbb282f7dd76a498a7f684428e4257202efc119ec010376f9"
 dependencies = [
  "bitflags 2.10.0",
  "bytemuck",
- "read-fonts",
+ "read-fonts 0.41.0",
  "smallvec",
 ]
 
@@ -949,6 +972,12 @@ version = "0.5.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "fc0fef456e4baa96da950455cd02c081ca953b141298e41db3fc7e36b1da849c"
 
+[[package]]
+name = "hexf-parse"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dfa686283ad6dd069f105e5ab091b04c62850d3e4cf5d67debad1933f55023df"
+
 [[package]]
 name = "icu_collections"
 version = "2.3.0"
@@ -1079,9 +1108,9 @@ checksum = "ae293c039020f9ec10710af98d29ce6aa2051486638b49c9a6409f3b4a9e98ad"
 
 [[package]]
 name = "image"
-version = "0.25.10"
+version = "0.25.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "85ab80394333c02fe689eaf900ab500fbd0c2213da414687ebf995a65d5a6104"
+checksum = "e6506c6c10786659413faa717ceebcb8f70731c0a60cbae39795fdf114519c1a"
 dependencies = [
  "bytemuck",
  "byteorder-lite",
@@ -1097,8 +1126,8 @@ dependencies = [
  "rayon",
  "rgb",
  "tiff",
- "zune-core",
+ "zune-core 0.5.0",
- "zune-jpeg",
+ "zune-jpeg 0.5.8",
 ]
 
 [[package]]
@@ -1218,12 +1247,11 @@ dependencies = [
 
 [[package]]
 name = "js-sys"
-version = "0.3.105"
+version = "0.3.83"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ce57d20d1ea864ce2ac172ab472d409214f4fd359f0b2a2775abdf522e2af99e"
+checksum = "464a3709c7f55f1f721e5389aa6ea4e3bc6aba669353300af094b29ffbdde1d8"
 dependencies = [
- "cfg-if",
+ "once_cell",
- "futures-util",
  "wasm-bindgen",
 ]
 
@@ -1252,9 +1280,9 @@ checksum = "7a79a3332a6609480d7d0c9eab957bca6b455b91bb84e66d19f5ff66294b85b8"
 
 [[package]]
 name = "libc"
-version = "0.2.189"
+version = "0.2.179"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3eaf3ede3fee6db1a4c2ee091bf8a8b4dccdc6d17f656fb07896ee72867612f2"
+checksum = "c5a2d376baa530d1238d133232d15e239abad80d05838b4b59354e5268af431f"
 
 [[package]]
 name = "libfuzzer-sys"
@@ -1347,6 +1375,15 @@ dependencies = [
  "imgref",
 ]
 
+[[package]]
+name = "malloc_buf"
+version = "0.0.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "62bb907fe88d54d8d9ce32a3cceab4218ed2f6b7d35617cafe9adf84e43919cb"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "maybe-rayon"
 version = "0.1.1"
@@ -1372,6 +1409,21 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "metal"
+version = "0.33.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c7047791b5bc903b8cd963014b355f71dc9864a9a0b727057676c1dcae5cbc15"
+dependencies = [
+ "bitflags 2.10.0",
+ "block",
+ "core-graphics-types 0.2.0",
+ "foreign-types",
+ "log",
+ "objc",
+ "paste",
+]
+
 [[package]]
 name = "miniz_oxide"
 version = "0.8.9"
@@ -1384,9 +1436,9 @@ dependencies = [
 
 [[package]]
 name = "moxcms"
-version = "0.8.1"
+version = "0.7.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bb85c154ba489f01b25c0d36ae69a87e4a1c73a72631fc6c0eb6dde34a73e44b"
+checksum = "ac9557c559cd6fc9867e122e20d2cbefc9ca29d80d027a8e39310920ed2f0a97"
 dependencies = [
  "num-traits",
  "pxfm",
@@ -1394,9 +1446,9 @@ dependencies = [
 
 [[package]]
 name = "naga"
-version = "30.0.1"
+version = "28.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a616d2fb8c89516ac2723a581f69d6c18576046bed761bd6b305e5618e6ae130"
+checksum = "618f667225063219ddfc61251087db8a9aec3c3f0950c916b614e403486f1135"
 dependencies = [
  "arrayvec",
  "bit-set",
@@ -1405,11 +1457,11 @@ dependencies = [
  "cfg_aliases",
  "codespan-reporting",
  "half",
- "hashbrown 0.17.1",
+ "hashbrown 0.16.1",
+ "hexf-parse",
  "indexmap",
  "libm",
  "log",
- "naga-types",
  "num-traits",
  "once_cell",
  "rustc-hash",
@@ -1418,18 +1470,6 @@ dependencies = [
  "unicode-ident",
 ]
 
-[[package]]
-name = "naga-types"
-version = "30.0.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "590afbf58a6f4f62873cd5cff4468061844bafa1cdf399cc954537c22d768d49"
-dependencies = [
- "hashbrown 0.17.1",
- "indexmap",
- "rustc-hash",
- "thiserror 2.0.17",
-]
-
 [[package]]
 name = "ndk"
 version = "0.9.0"
@@ -1554,6 +1594,15 @@ dependencies = [
  "syn 2.0.113",
 ]
 
+[[package]]
+name = "objc"
+version = "0.2.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "915b1b472bc21c53464d6c8461c9d3af805ba1ef837e1cac254428f4a77177b1"
+dependencies = [
+ "malloc_buf",
+]
+
 [[package]]
 name = "objc-sys"
 version = "0.3.5"
@@ -1586,13 +1635,13 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e4e89ad9e3d7d297152b17d39ed92cd50ca8063a89a9fa569046d41568891eff"
 dependencies = [
  "bitflags 2.10.0",
- "block2 0.5.1",
+ "block2",
  "libc",
  "objc2 0.5.2",
  "objc2-core-data",
  "objc2-core-image",
  "objc2-foundation 0.2.2",
- "objc2-quartz-core 0.2.2",
+ "objc2-quartz-core",
 ]
 
 [[package]]
@@ -1614,7 +1663,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "74dd3b56391c7a0596a295029734d3c1c5e7e510a4cb30245f8221ccea96b009"
 dependencies = [
  "bitflags 2.10.0",
- "block2 0.5.1",
+ "block2",
  "objc2 0.5.2",
  "objc2-core-location",
  "objc2-foundation 0.2.2",
@@ -1626,7 +1675,7 @@ version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a5ff520e9c33812fd374d8deecef01d4a840e7b41862d849513de77e44aa4889"
 dependencies = [
- "block2 0.5.1",
+ "block2",
  "objc2 0.5.2",
  "objc2-foundation 0.2.2",
 ]
@@ -1638,7 +1687,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "617fbf49e071c178c0b24c080767db52958f716d9eabdf0890523aeae54773ef"
 dependencies = [
  "bitflags 2.10.0",
- "block2 0.5.1",
+ "block2",
  "objc2 0.5.2",
  "objc2-foundation 0.2.2",
 ]
@@ -1673,10 +1722,10 @@ version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "55260963a527c99f1819c4f8e3b47fe04f9650694ef348ffd2227e8196d34c80"
 dependencies = [
- "block2 0.5.1",
+ "block2",
  "objc2 0.5.2",
  "objc2-foundation 0.2.2",
- "objc2-metal 0.2.2",
+ "objc2-metal",
 ]
 
 [[package]]
@@ -1685,7 +1734,7 @@ version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "000cfee34e683244f284252ee206a27953279d370e309649dc3ee317b37e5781"
 dependencies = [
- "block2 0.5.1",
+ "block2",
  "objc2 0.5.2",
  "objc2-contacts",
  "objc2-foundation 0.2.2",
@@ -1714,7 +1763,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0ee638a5da3799329310ad4cfa62fbf045d5f56e3ef5ba4149e7452dcf89d5a8"
 dependencies = [
  "bitflags 2.10.0",
- "block2 0.5.1",
+ "block2",
  "dispatch",
  "libc",
  "objc2 0.5.2",
@@ -1748,7 +1797,7 @@ version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a1a1ae721c5e35be65f01a03b6d2ac13a54cb4fa70d8a5da293d7b0020261398"
 dependencies = [
- "block2 0.5.1",
+ "block2",
  "objc2 0.5.2",
  "objc2-app-kit 0.2.2",
  "objc2-foundation 0.2.2",
@@ -1761,23 +1810,11 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "dd0cba1276f6023976a406a14ffa85e1fdd19df6b0f737b063b95f6c8c7aadd6"
 dependencies = [
  "bitflags 2.10.0",
- "block2 0.5.1",
+ "block2",
  "objc2 0.5.2",
  "objc2-foundation 0.2.2",
 ]
 
-[[package]]
-name = "objc2-metal"
-version = "0.3.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a0125f776a10d00af4152d74616409f0d4a2053a6f57fa5b7d6aa2854ac04794"
-dependencies = [
- "bitflags 2.10.0",
- "block2 0.6.2",
- "objc2 0.6.4",
- "objc2-foundation 0.3.2",
-]
-
 [[package]]
 name = "objc2-quartz-core"
 version = "0.2.2"
@@ -1785,24 +1822,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e42bee7bff906b14b167da2bac5efe6b6a07e6f7c0a21a7308d40c960242dc7a"
 dependencies = [
  "bitflags 2.10.0",
- "block2 0.5.1",
+ "block2",
  "objc2 0.5.2",
  "objc2-foundation 0.2.2",
- "objc2-metal 0.2.2",
+ "objc2-metal",
-]
-
-[[package]]
-name = "objc2-quartz-core"
-version = "0.3.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "96c1358452b371bf9f104e21ec536d37a650eb10f7ee379fff67d2e08d537f1f"
-dependencies = [
- "bitflags 2.10.0",
- "objc2 0.6.4",
- "objc2-core-foundation",
- "objc2-core-graphics",
- "objc2-foundation 0.3.2",
- "objc2-metal 0.3.2",
 ]
 
 [[package]]
@@ -1822,7 +1845,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b8bb46798b20cd6b91cbd113524c490f1686f4c4e8f49502431415f3512e2b6f"
 dependencies = [
  "bitflags 2.10.0",
- "block2 0.5.1",
+ "block2",
  "objc2 0.5.2",
  "objc2-cloud-kit",
  "objc2-core-data",
@@ -1830,7 +1853,7 @@ dependencies = [
  "objc2-core-location",
  "objc2-foundation 0.2.2",
  "objc2-link-presentation",
- "objc2-quartz-core 0.2.2",
+ "objc2-quartz-core",
  "objc2-symbols",
  "objc2-uniform-type-identifiers",
  "objc2-user-notifications",
@@ -1842,7 +1865,7 @@ version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "44fa5f9748dbfe1ca6c0b79ad20725a11eca7c2218bceb4b005cb1be26273bfe"
 dependencies = [
- "block2 0.5.1",
+ "block2",
  "objc2 0.5.2",
  "objc2-foundation 0.2.2",
 ]
@@ -1854,7 +1877,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "76cfcbf642358e8689af64cee815d139339f3ed8ad05103ed5eaf73db8d84cb3"
 dependencies = [
  "bitflags 2.10.0",
- "block2 0.5.1",
+ "block2",
  "objc2 0.5.2",
  "objc2-core-location",
  "objc2-foundation 0.2.2",
@@ -1948,7 +1971,7 @@ dependencies = [
  "linebender_resource_handle",
  "parlance",
  "parley_data",
- "skrifa",
+ "skrifa 0.44.0",
 ]
 
 [[package]]
@@ -2252,9 +2275,9 @@ dependencies = [
 
 [[package]]
 name = "ravif"
-version = "0.13.0"
+version = "0.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e52310197d971b0f5be7fe6b57530dcd27beb35c1b013f29d66c1ad73fbbcc45"
+checksum = "ef69c1990ceef18a116855938e74793a5f7496ee907562bd0857b6ac734ab285"
 dependencies = [
  "avif-serialize",
  "imgref",
@@ -2271,18 +2294,6 @@ version = "0.6.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "20675572f6f24e9e76ef639bc5552774ed45f1c30e2951e1e99c59888861c539"
 
-[[package]]
-name = "raw-window-metal"
-version = "1.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "40d213455a5f1dc59214213c7330e074ddf8114c9a42411eb890c767357ce135"
-dependencies = [
- "objc2 0.6.4",
- "objc2-core-foundation",
- "objc2-foundation 0.3.2",
- "objc2-quartz-core 0.3.2",
-]
-
 [[package]]
 name = "rayon"
 version = "1.11.0"
@@ -2303,6 +2314,16 @@ dependencies = [
  "crossbeam-utils",
 ]
 
+[[package]]
+name = "read-fonts"
+version = "0.36.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5eaa2941a4c05443ee3a7b26ab076a553c343ad5995230cc2b1d3e993bdc6345"
+dependencies = [
+ "bytemuck",
+ "font-types 0.10.1",
+]
+
 [[package]]
 name = "read-fonts"
 version = "0.41.0"
@@ -2310,7 +2331,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "046a7d674daf459825b32f5062056d6882db0d2f5a479fbd76ccfc870ac18709"
 dependencies = [
  "bytemuck",
- "font-types",
+ "font-types 0.12.4",
  "once_cell",
 ]
 
@@ -2485,6 +2506,16 @@ dependencies = [
  "quote",
 ]
 
+[[package]]
+name = "skrifa"
+version = "0.39.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9c9eb0b904a04d09bd68c65d946617b8ff733009999050f3b851c32fb3cfb60e"
+dependencies = [
+ "bytemuck",
+ "read-fonts 0.36.0",
+]
+
 [[package]]
 name = "skrifa"
 version = "0.44.0"
@@ -2492,7 +2523,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "819ab7d62b1d3e72d9d9dea5650bac30424f9111364bb94928dbf5ecad1baa68"
 dependencies = [
  "bytemuck",
- "read-fonts",
+ "read-fonts 0.41.0",
 ]
 
 [[package]]
@@ -2552,9 +2583,9 @@ dependencies = [
 
 [[package]]
 name = "spirv"
-version = "0.4.0+sdk-1.4.341.0"
+version = "0.3.0+sdk-1.3.268.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d9571ea910ebd84c86af4b3ed27f9dbdc6ad06f17c5f96146b2b671e2976744f"
+checksum = "eda41003dc44290527a59b13432d4a0379379fa074b70174882adfbdfd917844"
 dependencies = [
  "bitflags 2.10.0",
 ]
@@ -2583,7 +2614,7 @@ version = "0.2.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6c2499c2d826531388872b2268718aed907a39bd785ab0dcfe57fab26283f92e"
 dependencies = [
- "skrifa",
+ "skrifa 0.39.0",
  "yazi",
  "zeno",
 ]
@@ -2672,16 +2703,16 @@ dependencies = [
 
 [[package]]
 name = "tiff"
-version = "0.11.3"
+version = "0.10.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b63feaf3343d35b6ca4d50483f94843803b0f51634937cc2ec519fc32232bc52"
+checksum = "af9605de7fee8d9551863fd692cce7637f548dbd9db9180fcc07ccc6d26c336f"
 dependencies = [
  "fax",
  "flate2",
  "half",
  "quick-error",
  "weezl",
- "zune-jpeg",
+ "zune-jpeg 0.4.21",
 ]
 
 [[package]]
@@ -2854,9 +2885,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen"
-version = "0.2.128"
+version = "0.2.106"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "aecb87a33d3b0c5e3b7aa46336eaf486cffafbd281b195e4c8b80d50df2351bf"
+checksum = "0d759f433fa64a2d763d1340820e46e111a7a5ab75f993d1852d70b03dbb80fd"
 dependencies = [
  "cfg-if",
  "once_cell",
@@ -2867,19 +2898,22 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-futures"
-version = "0.4.78"
+version = "0.4.56"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6ef4c5d3d2cdf5c54f4231181768f5510842e350db025faf1f7163b1030ed928"
+checksum = "836d9622d604feee9e5de25ac10e3ea5f2d65b41eac0d9ce72eb5deae707ce7c"
 dependencies = [
+ "cfg-if",
  "js-sys",
+ "once_cell",
  "wasm-bindgen",
+ "web-sys",
 ]
 
 [[package]]
 name = "wasm-bindgen-macro"
-version = "0.2.128"
+version = "0.2.106"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a690d511e3c1a8b3a55e33511e3c2c00c78415cd23650f32b808627f5696b9ed"
+checksum = "48cb0d2638f8baedbc542ed444afc0644a29166f1595371af4fecf8ce1e7eeb3"
 dependencies = [
  "quote",
  "wasm-bindgen-macro-support",
@@ -2887,22 +2921,22 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-macro-support"
-version = "0.2.128"
+version = "0.2.106"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "411e4887f0071ef2d2164a9d5fdf2d20efbef78fccd3a78b0c10a1dc5295e48a"
+checksum = "cefb59d5cd5f92d9dcf80e4683949f15ca4b511f4ac0a6e14d4e1ac60c6ecd40"
 dependencies = [
  "bumpalo",
  "proc-macro2",
  "quote",
- "syn 3.0.5",
+ "syn 2.0.113",
  "wasm-bindgen-shared",
 ]
 
 [[package]]
 name = "wasm-bindgen-shared"
-version = "0.2.128"
+version = "0.2.106"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "81941cd78d0c92026c33e5e01312845a4cb1e9af3407f9134b100dd03144103e"
+checksum = "cbc538057e648b67f72a982e708d485b2efa771e1ac05fec311f9f63e5800db4"
 dependencies = [
  "unicode-ident",
 ]
@@ -3018,9 +3052,9 @@ dependencies = [
 
 [[package]]
 name = "web-sys"
-version = "0.3.105"
+version = "0.3.83"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9fbddc4a036f00ec4f18c83445bd3115cb306a91da554919a099d9222fe4a7f8"
+checksum = "9b32828d774c412041098d182a8b38b16ea816958e07cf40eec2bc080ae137ac"
 dependencies = [
  "js-sys",
  "wasm-bindgen",
@@ -3044,9 +3078,9 @@ checksum = "a28ac98ddc8b9274cb41bb4d9d4d5c425b6020c50c46f25559911905610b4a88"
 
 [[package]]
 name = "wgpu"
-version = "30.0.1"
+version = "28.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "527ccdf43dd5b2e8676eed9984ce00e2bbb0a1b85b70c1969dcb6cd2eb55ab9e"
+checksum = "f9cb534d5ffd109c7d1135f34cdae29e60eab94855a625dcfe1705f8bc7ad79f"
 dependencies = [
  "arrayvec",
  "bitflags 2.10.0",
@@ -3054,7 +3088,7 @@ dependencies = [
  "cfg-if",
  "cfg_aliases",
  "document-features",
- "hashbrown 0.17.1",
+ "hashbrown 0.16.1",
  "js-sys",
  "log",
  "naga",
@@ -3074,9 +3108,9 @@ dependencies = [
 
 [[package]]
 name = "wgpu-core"
-version = "30.0.1"
+version = "28.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "14c018fce9b6270aa203c2fdd56f3cce996713534bd757e4ea58c8560b121f14"
+checksum = "8bb4c8b5db5f00e56f1f08869d870a0dff7c8bc7ebc01091fec140b0cf0211a9"
 dependencies = [
  "arrayvec",
  "bit-set",
@@ -3085,11 +3119,10 @@ dependencies = [
  "bytemuck",
  "cfg_aliases",
  "document-features",
- "hashbrown 0.17.1",
+ "hashbrown 0.16.1",
  "indexmap",
  "log",
  "naga",
- "naga-types",
  "once_cell",
  "parking_lot",
  "portable-atomic",
@@ -3102,70 +3135,66 @@ dependencies = [
  "wgpu-core-deps-emscripten",
  "wgpu-core-deps-windows-linux-android",
  "wgpu-hal",
- "wgpu-naga-bridge",
  "wgpu-types",
 ]
 
 [[package]]
 name = "wgpu-core-deps-apple"
-version = "30.0.1"
+version = "28.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "061f3d319a40d39d00b1ecc2c33b89fe21d4e6fe01859df3500a3a8ecccd6b68"
+checksum = "87b7b696b918f337c486bf93142454080a32a37832ba8a31e4f48221890047da"
 dependencies = [
  "wgpu-hal",
 ]
 
 [[package]]
 name = "wgpu-core-deps-emscripten"
-version = "30.0.1"
+version = "28.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d98b86cf4abf524a902dd35f18ca6a3f08fc2ae9847c8f10b48e30491b1f0b86"
+checksum = "34b251c331f84feac147de3c4aa3aa45112622a95dd7ee1b74384fa0458dbd79"
 dependencies = [
  "wgpu-hal",
 ]
 
 [[package]]
 name = "wgpu-core-deps-windows-linux-android"
-version = "30.0.1"
+version = "28.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7586165fd5f6d881cb9ce4bb71f40d6caab2c0f1837e3fc1d9788a197fb6004f"
+checksum = "68ca976e72b2c9964eb243e281f6ce7f14a514e409920920dcda12ae40febaae"
 dependencies = [
  "wgpu-hal",
 ]
 
 [[package]]
 name = "wgpu-hal"
-version = "30.0.1"
+version = "28.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b6b7fb58561a792bc237628ba0792e332de418fefe145f13b5ed8201e6d52f58"
+checksum = "293080d77fdd14d6b08a67c5487dfddbf874534bb7921526db56a7b75d7e3bef"
 dependencies = [
  "android_system_properties",
  "arrayvec",
  "ash",
  "bit-set",
  "bitflags 2.10.0",
- "block2 0.6.2",
+ "block",
  "bytemuck",
  "cfg-if",
  "cfg_aliases",
+ "core-graphics-types 0.2.0",
  "glow",
  "glutin_wgl_sys",
  "gpu-allocator",
- "hashbrown 0.17.1",
+ "gpu-descriptor",
+ "hashbrown 0.16.1",
  "js-sys",
  "khronos-egl",
  "libc",
  "libloading",
  "log",
+ "metal",
  "naga",
- "naga-types",
  "ndk-sys",
- "objc2 0.6.4",
+ "objc",
- "objc2-core-foundation",
- "objc2-core-graphics",
- "objc2-foundation 0.3.2",
- "objc2-metal 0.3.2",
- "objc2-quartz-core 0.3.2",
  "once_cell",
  "ordered-float",
  "parking_lot",
@@ -3174,44 +3203,26 @@ dependencies = [
  "profiling",
  "range-alloc",
  "raw-window-handle",
- "raw-window-metal",
  "renderdoc-sys",
  "smallvec",
- "static_assertions",
  "thiserror 2.0.17",
  "wasm-bindgen",
- "wayland-sys",
  "web-sys",
- "wgpu-naga-bridge",
  "wgpu-types",
  "windows",
  "windows-core",
- "windows-result",
-]
-
-[[package]]
-name = "wgpu-naga-bridge"
-version = "30.0.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d2f62e73117bb7a62bfd9c5a5841438a823f6566c6442a808ee269d2d055c081"
-dependencies = [
- "naga",
- "wgpu-types",
 ]
 
 [[package]]
 name = "wgpu-types"
-version = "30.0.1"
+version = "28.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "99dad6f1fbdbbdb4c278a6508b059d44688f5cebddf78d005a46a31340269286"
+checksum = "e18308757e594ed2cd27dddbb16a139c42a683819d32a2e0b1b0167552f5840c"
 dependencies = [
  "bitflags 2.10.0",
  "bytemuck",
  "js-sys",
  "log",
- "naga-types",
- "raw-window-handle",
- "static_assertions",
  "web-sys",
 ]
 
@@ -3575,12 +3586,12 @@ dependencies = [
  "android-activity",
  "atomic-waker",
  "bitflags 2.10.0",
- "block2 0.5.1",
+ "block2",
  "bytemuck",
  "calloop",
  "cfg_aliases",
  "concurrent-queue",
- "core-foundation",
+ "core-foundation 0.9.4",
  "core-graphics",
  "cursor-icon",
  "dpi",
@@ -3847,6 +3858,12 @@ dependencies = [
  "syn 3.0.5",
 ]
 
+[[package]]
+name = "zune-core"
+version = "0.4.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3f423a2c17029964870cfaabb1f13dfab7d092a62a29a89264f4d36990ca414a"
+
 [[package]]
 name = "zune-core"
 version = "0.5.0"
@@ -3862,11 +3879,20 @@ dependencies = [
  "simd-adler32",
 ]
 
+[[package]]
+name = "zune-jpeg"
+version = "0.4.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "29ce2c8a9384ad323cf564b67da86e21d3cfdff87908bc1223ed5c99bc792713"
+dependencies = [
+ "zune-core 0.4.12",
+]
+
 [[package]]
 name = "zune-jpeg"
 version = "0.5.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e35aee689668bf9bd6f6f3a6c60bb29ba1244b3b43adfd50edd554a371da37d5"
 dependencies = [
- "zune-core",
+ "zune-core 0.5.0",
 ]

Cargo.toml

@@ -29,9 +29,9 @@ edition = "2024"
 [workspace.dependencies]
 pollster = "0.4.0"
 winit = "0.30.12"
-wgpu = "30.0.1"
+wgpu = "28.0.0"
 bytemuck = "1.23.1"
-image = "0.25.10"
+image = "0.25.6"
 parley = "0.11.1"
 swash = "0.2.10"
 fxhash = "0.2.1"

core/src/event/manager.rs

@@ -135,6 +135,11 @@ impl<Rsc: HasEvents + 'static, E: Event> TypeEventManager<Rsc, E> {
         ));
     }
 
+    /// What this widget registered, without running any of it.
+    pub fn registered(&self, id: WidgetId) -> impl Iterator<Item = &E> {
+        self.map.get(&id).into_iter().flatten().map(|(e, _)| e)
+    }
+
     pub fn run_fn<'a>(
         &mut self,
         id: impl IdLike,

core/src/render/mod.rs

@@ -186,8 +186,8 @@ impl UiRenderNode {
         for source in &registry.sources()[self.primitives.len()..] {
             let render = (source.render)(device, queue);
             let data_layout = Self::data_layout(device, source.stride);
-            let mut groups = vec![Some(&self.shared_layout), Some(&data_layout)];
+            let mut groups = vec![&self.shared_layout, &data_layout];
-            groups.extend(render.layout().map(Some));
+            groups.extend(render.layout());
             let layout = device.create_pipeline_layout(&PipelineLayoutDescriptor {
                 label: Some(source.label),
                 bind_group_layouts: &groups,
@@ -219,7 +219,7 @@ impl UiRenderNode {
             vertex: VertexState {
                 module: &module,
                 entry_point: Some("vs_main"),
-                buffers: &[Some(PrimitiveInstance::desc())],
+                buffers: &[PrimitiveInstance::desc()],
                 compilation_options: Default::default(),
             },
             fragment: Some(FragmentState {

src/default/mod.rs

@@ -1,6 +1,10 @@
 use crate::prelude::*;
 use arboard::Clipboard;
-use std::{marker::PhantomData, sync::Arc, time::Instant};
+use std::{
+    marker::{PhantomData, Sized},
+    sync::Arc,
+    time::Instant,
+};
 use winit::{
     event::{Ime, WindowEvent},
     event_loop::{ActiveEventLoop, EventLoopProxy},

src/default/render.rs

@@ -22,20 +22,7 @@ impl UiRenderer {
     }
 
     pub fn draw(&mut self) {
-        let output = match self.surface.get_current_texture() {
+        let output = self.surface.get_current_texture().unwrap();
-            CurrentSurfaceTexture::Success(texture) => texture,
-            CurrentSurfaceTexture::Suboptimal(texture) => {
-                self.surface.configure(&self.device, &self.config);
-                texture
-            }
-            CurrentSurfaceTexture::Outdated | CurrentSurfaceTexture::Lost => {
-                self.surface.configure(&self.device, &self.config);
-                return;
-            }
-            CurrentSurfaceTexture::Timeout
-            | CurrentSurfaceTexture::Occluded
-            | CurrentSurfaceTexture::Validation => return,
-        };
         let view = output
             .texture
             .create_view(&TextureViewDescriptor::default());
@@ -59,7 +46,7 @@ impl UiRenderer {
 
         self.queue.submit(std::iter::once(encoder.finish()));
         self.window.pre_present_notify();
-        self.queue.present(output);
+        output.present();
     }
 
     pub fn resize(&mut self, size: &PhysicalSize<u32>) {
@@ -78,10 +65,9 @@ impl UiRenderer {
     pub fn new(window: Arc<Window>) -> Self {
         let size = window.inner_size();
 
-        let instance = Instance::new(InstanceDescriptor {
+        let instance = Instance::new(&InstanceDescriptor {
             backends: Backends::PRIMARY,
-            display: Some(Box::new(window.clone())),
+            ..Default::default()
-            ..InstanceDescriptor::new_without_display_handle()
         });
 
         let surface = instance
@@ -93,7 +79,6 @@ impl UiRenderer {
                 power_preference: PowerPreference::default(),
                 compatible_surface: Some(&surface),
                 force_fallback_adapter: false,
-                apply_limit_buckets: false,
             })
             .block_on()
             .expect("Could not get adapter!");
@@ -120,7 +105,6 @@ impl UiRenderer {
         let config = SurfaceConfiguration {
             usage: TextureUsages::RENDER_ATTACHMENT,
             format: surface_format,
-            color_space: SurfaceColorSpace::Auto,
             width: size.width,
             height: size.height,
             present_mode: PresentMode::AutoVsync,

src/default/sense.rs

@@ -52,6 +52,19 @@ impl CursorSense {
     pub fn is_dragging(&self) -> bool {
         matches!(self, CursorSense::Pressing(CursorButton::Left))
     }
+
+    /// Takes what this sense answers to out of `cursor`, so a widget below
+    /// does not also get it. Hovering takes nothing: it goes to the topmost
+    /// widget in shape, which is not a question about the input.
+    fn take(&self, cursor: &mut CursorState) {
+        match self {
+            Self::PressStart(button) | Self::Pressing(button) | Self::PressEnd(button) => {
+                *cursor.buttons.select_mut(button) = ActivationState::Off
+            }
+            Self::Scroll => cursor.scroll_delta = Vec2::ZERO,
+            Self::HoverStart | Self::Hovering | Self::HoverEnd => {}
+        }
+    }
 }
 
 #[derive(Default, Clone)]
@@ -78,6 +91,14 @@ impl CursorButtons {
         }
     }
 
+    pub fn select_mut(&mut self, button: &CursorButton) -> &mut ActivationState {
+        match button {
+            CursorButton::Left => &mut self.left,
+            CursorButton::Right => &mut self.right,
+            CursorButton::Middle => &mut self.middle,
+        }
+    }
+
     pub fn end_frame(&mut self) {
         self.left.end_frame();
         self.middle.end_frame();
@@ -164,17 +185,33 @@ impl SensorUi for UiRenderState {
         // state like thing, but local to render state, and is passed to UiRsc events so you can
         // update it there?
         let mut active = std::mem::take(&mut rsc.events_mut().get_type::<CursorSense>().active);
+        // Narrowed as it descends: a widget takes what it answers to, and
+        // what is left is what the layers below see.
+        let mut cursor = cursor;
+        let mut hovered = false;
         for layer in self.layers.indices().rev() {
-            let mut sensed = false;
+            let mut below = cursor.clone();
+            let mut hovered_here = false;
             for (id, sensor) in active.get_mut(&layer).into_flat_iter() {
                 let shape = self.active.get(id).unwrap().region;
                 let region = shape.to_px(window_size);
-                let in_shape = cursor.exists && region.contains(cursor.pos);
+                let over = cursor.exists && region.contains(cursor.pos);
-                sensor.hover.update(in_shape);
+                // Hover goes to the topmost widget in shape and no further.
-                if sensor.hover == ActivationState::Off {
+                sensor.hover.update(over && !hovered);
+                // `is_off` would be wrong here: it counts `End`, which is
+                // the one frame a hover-end handler has to run on.
+                if !over && sensor.hover == ActivationState::Off {
                     continue;
                 }
-                sensed = true;
+                hovered_here |= over;
+
+                for senses in rsc.events_mut().get_type::<CursorSense>().registered(*id) {
+                    for sense in senses.iter() {
+                        if matches(sense, &cursor, sensor.hover) {
+                            sense.take(&mut below);
+                        }
+                    }
+                }
 
                 let cursor = cursor.clone();
 
@@ -191,7 +228,9 @@ impl SensorUi for UiRenderState {
                 };
                 rsc.run_event::<CursorSense>(*id, data, state);
             }
-            if sensed {
+            hovered |= hovered_here;
+            cursor = below;
+            if hovered && !is_momentary(&cursor) {
                 break;
             }
         }
@@ -204,8 +243,14 @@ pub fn should_run(
     cursor: &CursorState,
     hover: ActivationState,
 ) -> Option<CursorSense> {
-    for sense in senses.iter() {
+    senses
-        if match sense {
+        .iter()
+        .find(|sense| matches(sense, cursor, hover))
+        .copied()
+}
+
+fn matches(sense: &CursorSense, cursor: &CursorState, hover: ActivationState) -> bool {
+    match sense {
         CursorSense::PressStart(button) => cursor.buttons.select(button).is_start(),
         CursorSense::Pressing(button) => cursor.buttons.select(button).is_on(),
         CursorSense::PressEnd(button) => cursor.buttons.select(button).is_end(),
@@ -213,11 +258,12 @@ pub fn should_run(
         CursorSense::Hovering => hover.is_on(),
         CursorSense::HoverEnd => hover.is_end(),
         CursorSense::Scroll => cursor.scroll_delta != Vec2::ZERO,
-        } {
-            return Some(*sense);
     }
-    }
+}
-    None
+
+/// Whether anything is happening to the cursor beyond where it rests.
+fn is_momentary(cursor: &CursorState) -> bool {
+    cursor.scroll_delta != Vec2::ZERO || cursor.buttons.iter().any(|(_, state)| !state.is_off())
 }
 
 impl ActivationState {

src/widget/position/mod.rs

@@ -4,7 +4,7 @@ mod max_size;
 mod offset;
 mod pad;
 mod scroll;
-mod set_size;
+mod sized;
 mod span;
 mod stack;
 
@@ -14,6 +14,6 @@ pub use max_size::*;
 pub use offset::*;
 pub use pad::*;
 pub use scroll::*;
-pub use set_size::*;
+pub use sized::*;
 pub use span::*;
 pub use stack::*;

src/widget/position/sized.rs

@@ -1,12 +1,12 @@
 use crate::prelude::*;
 
-pub struct SetSize {
+pub struct Sized {
     pub inner: StrongWidget,
     pub x: Option<Len>,
     pub y: Option<Len>,
 }
 
-impl SetSize {
+impl Sized {
     fn apply_to_outer(&self, ctx: &mut SizeCtx) {
         if let Some(x) = self.x {
             ctx.outer.x.select_len(x.apply_rest());
@@ -17,7 +17,7 @@ impl SetSize {
     }
 }
 
-impl Widget for SetSize {
+impl Widget for Sized {
     fn draw(&mut self, painter: &mut Painter) {
         painter.widget(&self.inner);
     }

src/widget/ptr.rs

@@ -1,5 +1,5 @@
 use crate::prelude::*;
-use std::marker::Unsize;
+use std::marker::{Sized, Unsize};
 
 pub struct WidgetPtr {
     pub inner: Option<StrongWidget>,

src/widget/text/build.rs

@@ -1,5 +1,5 @@
 use crate::prelude::*;
-use std::marker::PhantomData;
+use std::marker::{PhantomData, Sized};
 
 pub struct TextBuilder<State, O = TextOutput, H: WidgetOption<State> = ()> {
     pub content: String,

src/widget/trait_fns.rs

@@ -31,9 +31,9 @@ widget_trait! {
         }
     }
 
-    fn sized(self, size: impl Into<Size>) -> impl WidgetFn<Rsc, SetSize> {
+    fn sized(self, size: impl Into<Size>) -> impl WidgetFn<Rsc, Sized> {
         let size = size.into();
-        move |state| SetSize {
+        move |state| Sized {
             inner: self.add_strong(state),
             x: Some(size.x),
             y: Some(size.y),
@@ -58,18 +58,18 @@ widget_trait! {
         }
     }
 
-    fn width(self, len: impl Into<Len>) -> impl WidgetFn<Rsc, SetSize> {
+    fn width(self, len: impl Into<Len>) -> impl WidgetFn<Rsc, Sized> {
         let len = len.into();
-        move |state| SetSize {
+        move |state| Sized {
             inner: self.add_strong(state),
             x: Some(len),
             y: None,
         }
     }
 
-    fn height(self, len: impl Into<Len>) -> impl WidgetFn<Rsc, SetSize> {
+    fn height(self, len: impl Into<Len>) -> impl WidgetFn<Rsc, Sized> {
         let len = len.into();
-        move |state| SetSize {
+        move |state| Sized {
             inner: self.add_strong(state),
             x: None,
             y: Some(len),

tests/draw_cost.rs

@@ -4,19 +4,20 @@
 //!
 //!     cargo test --release --test draw_cost -- --ignored --nocapture
 //!
-//! Wall time is the wrong number to read for anything under a few percent --
+//! **Read the instruction count, not the clock.** Wall time here swings by 2x
-//! it varied by 2x between runs of one unchanged binary where instructions
+//! between runs of one binary on this machine -- more under `cargo test` than
-//! retired varied by 0.1%. Count those instead:
+//! run directly -- while instructions retired are stable to 0.1%:
 //!
 //!     perf stat -e instructions:u target/release/.../draw_cost-* --ignored
 //!
-//! That is how `PrimitiveRender` was measured against a match in the renderer:
+//! Measured that way on 2026-09-13, drawing each primitive through its own
-//! 6 instructions per list drawn, against the ~5,400 wgpu spends recording
+//! `PrimitiveRender` rather than a match in the renderer costs **6
-//! one.
+//! instructions per list drawn**, which is 0.1% of a frame at both 256 and
+//! 1024 layers. Recording one list into the pass costs wgpu ~5,400.
 //!
-//! The instance is leaked deliberately. A Vulkan loader may unload the driver
+//! The instance is leaked on purpose. Dropping the last one makes the Vulkan
-//! when the last one drops, which can fault as a thread that used it exits --
+//! loader unload Mesa's ICD, which faults when a thread that touched Vulkan
-//! and every test runs on a spawned thread.
+//! exits -- and libtest runs every test on a spawned thread.
 
 use std::time::Instant;
 
@@ -29,20 +30,20 @@ use wgpu::{Color as GpuColor, *};
 
 const SIZE: u32 = 1024;
 const FRAMES: u32 = 200;
-/// Reported as the best of this many batches, since the mean moves by more
+/// Reported as the best of this many batches. The mean moves by 15% between
-/// than the thing being measured.
+/// runs on this machine, which is more than the thing being measured.
 const BATCHES: u32 = 8;
 
 fn gpu() -> Option<(Device, Queue)> {
-    // Probed rather than assumed: there may be no Vulkan adapter, and GL is
+    // Probed rather than assumed: this machine's Vulkan device comes and goes,
-    // what is left when there is not.
+    // and GL is what is left when it is gone.
-    let all = Instance::new(InstanceDescriptor::new_without_display_handle());
+    let all = Instance::new(&InstanceDescriptor::default());
     let instance = match pollster::block_on(all.request_adapter(&RequestAdapterOptions::default()))
     {
         Ok(_) => all,
-        Err(_) => Instance::new(InstanceDescriptor {
+        Err(_) => Instance::new(&InstanceDescriptor {
             backends: Backends::GL,
-            ..InstanceDescriptor::new_without_display_handle()
+            ..Default::default()
         }),
     };
     // Leaked rather than dropped: see the note at the top of the file.
@@ -57,7 +58,6 @@ fn config(format: TextureFormat) -> SurfaceConfiguration {
     SurfaceConfiguration {
         usage: TextureUsages::RENDER_ATTACHMENT,
         format,
-        color_space: SurfaceColorSpace::Auto,
         width: SIZE,
         height: SIZE,
         present_mode: PresentMode::Fifo,

tests/pointer_routing.rs

@@ -0,0 +1,180 @@
+//! A widget takes only what it answers to: a button over a list takes the
+//! click and leaves the scroll. These drive `run_sensors` directly, which
+//! needs no GPU and no window.
+
+use iris::prelude::*;
+use std::{cell::Cell, rc::Rc};
+
+struct SenseRsc {
+    ui: UiData,
+    events: EventManager<SenseRsc>,
+}
+
+impl UiRsc for SenseRsc {
+    fn ui(&self) -> &UiData {
+        &self.ui
+    }
+    fn ui_mut(&mut self) -> &mut UiData {
+        &mut self.ui
+    }
+    fn on_draw(&mut self, active: &ActiveData) {
+        self.events.draw(active);
+    }
+    fn on_undraw(&mut self, active: &ActiveData) {
+        self.events.undraw(active);
+    }
+    fn on_remove(&mut self, id: WidgetId) {
+        self.events.remove(id);
+    }
+}
+
+impl HasState for SenseRsc {
+    type State = ();
+}
+
+impl HasEvents for SenseRsc {
+    fn events(&self) -> &EventManager<Self> {
+        &self.events
+    }
+    fn events_mut(&mut self) -> &mut EventManager<Self> {
+        &mut self.events
+    }
+}
+
+fn cursor_at(pos: Vec2) -> CursorState {
+    CursorState {
+        pos,
+        exists: true,
+        buttons: Default::default(),
+        scroll_delta: Vec2::ZERO,
+    }
+}
+
+/// A button covering a list, on the layer above it: the list scrolls, the
+/// button clicks, and the returned flags say which fired.
+fn button_over_list() -> (UiRenderState, SenseRsc, Rc<Cell<bool>>, Rc<Cell<bool>>) {
+    let mut rsc = SenseRsc {
+        ui: UiData::default(),
+        events: EventManager::default(),
+    };
+
+    // Both cover the whole window: the button "sitting over" the list.
+    let list = rsc.ui.widgets.add_strong(Rect::new(UiColor::WHITE));
+    let list_weak = list.weak();
+    let button = rsc.ui.widgets.add_strong(Rect::new(UiColor::RED));
+    let button_weak = button.weak();
+
+    let scrolled = Rc::new(Cell::new(false));
+    let clicked = Rc::new(Cell::new(false));
+    {
+        let scrolled = scrolled.clone();
+        rsc.register_event(list_weak, CursorSense::Scroll, move |_ctx, _rsc| {
+            scrolled.set(true);
+        });
+    }
+    {
+        let clicked = clicked.clone();
+        rsc.register_event(button_weak, CursorSense::click(), move |_ctx, _rsc| {
+            clicked.set(true);
+        });
+    }
+
+    // A Stack draws each child on its own layer, in order.
+    let root = rsc
+        .ui
+        .widgets
+        .add_strong(Stack {
+            children: vec![list.any(), button.any()],
+            size: StackSize::default(),
+        })
+        .any();
+
+    let mut render = UiRenderState::new();
+    render.resize((100.0, 100.0));
+    render.update(&root, &mut rsc);
+
+    (render, rsc, scrolled, clicked)
+}
+
+#[test]
+fn a_button_over_a_list_scrolls_the_list_and_still_clicks() {
+    let (render, mut rsc, scrolled, clicked) = button_over_list();
+    let mut state = ();
+
+    let mut scroll = cursor_at((50.0, 50.0).into());
+    scroll.scroll_delta = (0.0, 10.0).into();
+    render.run_sensors(&mut rsc, &mut state, scroll, (100.0, 100.0).into());
+
+    assert!(
+        scrolled.get(),
+        "a scroll over the button must still reach the list underneath it"
+    );
+    assert!(
+        !clicked.get(),
+        "a scroll is not a click; the button must not have fired"
+    );
+
+    let mut click = cursor_at((50.0, 50.0).into());
+    click.buttons.left = ActivationState::Start;
+    render.run_sensors(&mut rsc, &mut state, click, (100.0, 100.0).into());
+
+    assert!(
+        clicked.get(),
+        "the button on top must still receive an actual click"
+    );
+}
+
+#[test]
+fn a_click_and_a_scroll_in_one_frame_go_to_different_widgets() {
+    let (render, mut rsc, scrolled, clicked) = button_over_list();
+    let mut state = ();
+
+    let mut both = cursor_at((50.0, 50.0).into());
+    both.scroll_delta = (0.0, 10.0).into();
+    both.buttons.left = ActivationState::Start;
+    render.run_sensors(&mut rsc, &mut state, both, (100.0, 100.0).into());
+
+    assert!(
+        clicked.get(),
+        "the button takes the click it registered for"
+    );
+    assert!(
+        scrolled.get(),
+        "taking the click must not take the scroll with it"
+    );
+}
+
+#[test]
+fn leaving_a_widget_still_ends_its_hover() {
+    let mut rsc = SenseRsc {
+        ui: UiData::default(),
+        events: EventManager::default(),
+    };
+    let widget = rsc.ui.widgets.add_strong(Rect::new(UiColor::WHITE));
+    let ended = Rc::new(Cell::new(false));
+    {
+        let ended = ended.clone();
+        rsc.register_event(widget.weak(), CursorSense::HoverEnd, move |_ctx, _rsc| {
+            ended.set(true);
+        });
+    }
+
+    let root = widget.any();
+    let mut render = UiRenderState::new();
+    render.resize((100.0, 100.0));
+    render.update(&root, &mut rsc);
+
+    let mut state = ();
+    render.run_sensors(
+        &mut rsc,
+        &mut state,
+        cursor_at((50.0, 50.0).into()),
+        (100.0, 100.0).into(),
+    );
+    assert!(!ended.get(), "the cursor is still on it");
+
+    let mut gone = cursor_at((50.0, 50.0).into());
+    gone.exists = false;
+    render.run_sensors(&mut rsc, &mut state, gone, (100.0, 100.0).into());
+    assert!(ended.get(), "leaving a widget ends its hover");
+}