Fix Android text rendering crash

README.md

@@ -220,6 +220,10 @@ Rectangle {
 }
 ```
 
+Set `transparent: true` to omit a box's fill. It also works on the root
+`Screen`; a transparent screen reveals the desktop when its native host window
+is configured for transparency, as demonstrated by `examples/custom_window`.
+
 `border_width` is shorthand for all four edges; an explicitly declared edge
 overrides it. The equivalent V API fields live directly on `BoxStyle`.
 
@@ -602,6 +606,9 @@ Typed-VML ports from `v-ui` include:
   separators, disabled and checked rows, and nested submenus.
 - `v run examples/tray_icon/main.v` — a status area icon whose menu sets a
   status, toggles a setting, and docks or hides the icon again.
+- `v run examples/custom_window/main.v` — a borderless desktop widget with
+  ui2-drawn chrome, draggable content, and genuinely transparent space between
+  its rounded surfaces on the native macOS and Windows backends.
 
 Run the calculator demo with:
 

appkit/ui_macos_darwin.v

@@ -838,7 +838,7 @@ fn render_root(declared Element) {
 	st.textview_ids = map[u64]string{}
 	st.textview_action_ids = map[u64]string{}
 	st.scroll_ids = map[u64]string{}
-	native_set_background(st.root_view, root.box.bg)
+	native_set_box_background(st.root_view, root.box)
 	mut active := map[string]bool{}
 	render_children(st.root_view, root.children, '', mut active)
 	remove_stale_nodes(active)

assets/fonts/MaterialIcons-LICENSE.txt

@@ -0,0 +1,202 @@
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assets/fonts/README.md

@@ -3,8 +3,9 @@
 Roboto 3.016, the `web/static` build from
 [googlefonts/roboto-classic](https://github.com/googlefonts/roboto-classic/releases/tag/v3.016),
 covering Latin, Greek, Cyrillic, and Vietnamese, Roboto Mono 3.001 from
-[googlefonts/RobotoMono](https://github.com/googlefonts/RobotoMono), Noto Sans
-Symbols 2 v2.008, the `unhinted` build from
+[googlefonts/RobotoMono](https://github.com/googlefonts/RobotoMono), Material
+Icons from [google/material-design-icons](https://github.com/google/material-design-icons),
+Noto Sans Symbols 2 v2.008, the `unhinted` build from
 [notofonts/symbols](https://github.com/notofonts/symbols/releases/tag/NotoSansSymbols2-v2.008),
 and Noto Emoji 3.002 from
 [google/fonts](https://github.com/google/fonts/tree/main/ofl/notoemoji).
@@ -18,7 +19,13 @@ finds its mono face by rewriting `-Regular` to `Mono-Regular` in the path it was
 given. It is also what an element asking for an unavailable fixed-pitch family,
 such as `Consolas` or the generic `monospace`, falls back to.
 
-`NotoSansSymbols2-Regular.ttf` is not drawn with directly; it is the first face
+`MaterialIcons-Regular.ttf` supplies portable equivalents for platform icon
+names such as SF Symbols on a custom-rendered desktop. It is also at the front
+of the fallback chain so its private-use glyphs can be drawn without depending
+on a machine-installed icon font.
+
+`NotoSansSymbols2-Regular.ttf` is not drawn with directly; it follows Material
+Icons in the fallback chain and is the first general-purpose symbol face
 the renderer searches when the text font has no outline for a code point. Roboto
 covers 927 of them, which is every letter an interface is written in and almost
 none of the marks it labels rows with, so a ▸ or a ✓ would otherwise come
@@ -55,6 +62,9 @@ instructions, so the `hinted` build would only add bytes. For the same reason
 Noto Sans Symbols 2 is the `unhinted` build rather than the `googlefonts` one,
 which is the same outlines and twice the file.
 
-All four families are licensed under the SIL Open Font License 1.1. They carry
+Roboto, Roboto Mono, Noto Sans Symbols 2, and Noto Emoji are licensed under the
+SIL Open Font License 1.1. They carry
 different copyright notices, so each keeps its own copy: `Roboto-OFL.txt`,
 `RobotoMono-OFL.txt`, `NotoSansSymbols2-OFL.txt` and `NotoEmoji-OFL.txt`.
+Material Icons is licensed under Apache License 2.0, kept as
+`MaterialIcons-LICENSE.txt`.

examples/custom_window/README.md

@@ -0,0 +1,24 @@
+# Custom window
+
+This example keeps the interface in ui2 while replacing the native desktop
+frame with a small platform adapter:
+
+```sh
+v run examples/custom_window
+```
+
+- macOS changes ui2's `NSWindow` to a borderless, non-opaque window and gives
+  the root `Screen` a transparent background.
+- Windows changes ui2's `HWND` to a borderless layered window and color-keys
+  the otherwise unused `#010203` screen background.
+- Linux and opt-in custom-rendered desktop builds show the same layout in a
+  normal window as a portable fallback.
+
+The header is an ordinary draggable ui2 `Rectangle`. Its pointer-down event is
+handed to `performWindowDragWithEvent:` or `WM_NCLBUTTONDOWN`, so the operating
+system still performs the move. The close button calls `ui2.quit()`. Everything
+else—including the separated rounded surfaces and the clear space between
+them—is declared in [`custom_window.qml`](custom_window.qml).
+
+For a resizable custom frame, keep the same pattern and add narrow draggable
+ui2 regions at the edges, routing them to the platform's native resize action.

examples/custom_window/custom_window.qml

@@ -0,0 +1,73 @@
+Screen {
+    id: root
+    background: app.screen_background
+    transparent: app.transparent_screen
+
+    Rectangle {
+        id: card_shadow
+        x: 16
+        y: 14
+        width: root.width - 32
+        height: 122
+        background: #020617
+        corner_radius: 22
+    }
+
+    Rectangle {
+        id: card
+        x: 12
+        y: 10
+        width: root.width - 32
+        height: 122
+        background: #111827
+        corner_radius: 22
+        border_color: #334155
+        border_width: 1
+
+        Rectangle {
+            id: window_drag
+            on_tap: "window_drag"
+            clickable: true
+            draggable: true
+            x: 0
+            y: 0
+            width: card.width
+            height: 48
+            transparent: true
+
+            Rectangle { x: 18 y: 18 width: 10 height: 10 background: #34D399 corner_radius: 5 }
+            Label { text: "FOCUS WIDGET" x: 38 y: 13 width: 200 height: 22 color: #E2E8F0 font_size: 12 bold: true }
+            Label { text: "drag anywhere on this header" x: 202 y: 14 width: card.width - 252 height: 20 align: right color: #64748B font_size: 10 }
+        }
+
+        Button { id: close text: "×" on_tap: "close" x: card.width - 42 y: 10 width: 30 height: 30 background: #7F1D1D corner_radius: 15 color: #FEE2E2 font_size: 18 bold: true accessibility_label: "Close widget" }
+        Label { text: app.completed_label x: 20 y: 57 width: card.width - 40 height: 26 color: #F8FAFC font_size: 19 bold: true }
+        Label { text: app.platform_note x: 20 y: 91 width: card.width - 40 height: 18 color: #94A3B8 font_size: 10 }
+    }
+
+    Rectangle {
+        id: action_shadow
+        x: root.width / 2 - 130
+        y: 152
+        width: 260
+        height: 48
+        background: #020617
+        corner_radius: 24
+    }
+
+    Rectangle {
+        id: actions
+        x: root.width / 2 - 132
+        y: 148
+        width: 260
+        height: 48
+        background: #1E293B
+        corner_radius: 24
+        border_color: #475569
+        border_width: 1
+
+        Button { id: decrement text: "−" on_tap: "decrement" enabled: app.completed > 0 x: 8 y: 7 width: 50 height: 34 background: #334155 corner_radius: 17 color: #F8FAFC font_size: 18 bold: true accessibility_label: "Remove a completed session" }
+        Button { id: reset text: app.completed x: 68 y: 7 width: 120 height: 34 background: #0F172A corner_radius: 17 color: #A7F3D0 font_size: 16 bold: true accessibility_label: "Reset completed sessions" on_tap: "reset" }
+        Button { id: increment text: "+" on_tap: "increment" x: 198 y: 7 width: 54 height: 34 background: #047857 corner_radius: 17 color: #ECFDF5 font_size: 18 bold: true accessibility_label: "Complete a focus session" }
+    }
+}