6 files changed, 163 insertions, 0 deletions
diff --git a/examples/gtk3/js/osd/README.md b/examples/gtk3/js/osd/README.md
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index 0000000..ee1d497
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+++ b/examples/gtk3/js/osd/README.md
@@ -0,0 +1,7 @@
+# On Screen Display
+
+![osd](https://github.com/user-attachments/assets/08e0e118-6b07-4cac-8ebc-08262594cee7)
+
+A simple widget that pops up when screen brightness or audio changes
+
+Uses the [WirePlumber library](https://aylur.github.io/astal/guide/libraries/wireplumber).
diff --git a/examples/gtk3/js/osd/app.ts b/examples/gtk3/js/osd/app.ts
new file mode 100644
index 0000000..50e314e
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+++ b/examples/gtk3/js/osd/app.ts
@@ -0,0 +1,11 @@
+import { App } from "astal/gtk3"
+import style from "./style.scss"
+import OSD from "./osd/OSD"
+
+App.start({
+    instanceName: "osd-example",
+    css: style,
+    main() {
+        App.get_monitors().map(OSD)
+    },
+})
diff --git a/examples/gtk3/js/osd/osd/OSD.scss b/examples/gtk3/js/osd/osd/OSD.scss
new file mode 100644
index 0000000..d0fe4d1
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+++ b/examples/gtk3/js/osd/osd/OSD.scss
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+$fg-color: #{"@theme_fg_color"};
+$bg-color: #{"@theme_bg_color"};
+
+window.OSD {
+    box.OSD {
+        border-radius: 100px;
+        background-color: $bg-color;
+        padding: 13px 16px;
+        margin: 13px;
+        box-shadow: 3px 3px 7px 0 rgba(0,0,0,.4);
+    }
+
+    icon {
+        font-size: 4rem;
+    }
+
+    label {
+        font-size: 2.4rem;
+    }
+
+    levelbar {
+        trough {
+            margin: 1 .6rem;
+        }
+
+        block {
+            min-height: 2rem;
+        }
+    }
+}
diff --git a/examples/gtk3/js/osd/osd/OSD.tsx b/examples/gtk3/js/osd/osd/OSD.tsx
new file mode 100644
index 0000000..df28da5
--- /dev/null
+++ b/examples/gtk3/js/osd/osd/OSD.tsx
@@ -0,0 +1,69 @@
+import { App, Astal, Gdk, Gtk } from "astal/gtk3"
+import { timeout } from "astal/time"
+import Variable from "astal/variable"
+import Brightness from "./brightness"
+import Wp from "gi://AstalWp"
+
+function OnScreenProgress({ visible }: { visible: Variable<boolean> }) {
+    const brightness = Brightness.get_default()
+    const speaker = Wp.get_default()!.get_default_speaker()
+
+    const iconName = Variable("")
+    const value = Variable(0)
+
+    let count = 0
+    function show(v: number, icon: string) {
+        visible.set(true)
+        value.set(v)
+        iconName.set(icon)
+        count++
+        timeout(2000, () => {
+            count--
+            if (count === 0) visible.set(false)
+        })
+    }
+
+    return (
+        <revealer
+            setup={(self) => {
+                self.hook(brightness, "notify::screen", () =>
+                    show(brightness.screen, "display-brightness-symbolic"),
+                )
+
+                if (speaker) {
+                    self.hook(speaker, "notify::volume", () =>
+                        show(speaker.volume, speaker.volumeIcon),
+                    )
+                }
+            }}
+            revealChild={visible()}
+            transitionType={Gtk.RevealerTransitionType.SLIDE_UP}
+        >
+            <box className="OSD">
+                <icon icon={iconName()} />
+                <levelbar valign={Gtk.Align.CENTER} widthRequest={100} value={value()} />
+                <label label={value(v => `${Math.floor(v * 100)}%`)} />
+            </box>
+        </revealer>
+    )
+}
+
+export default function OSD(monitor: Gdk.Monitor) {
+    const visible = Variable(false)
+
+    return (
+        <window
+            gdkmonitor={monitor}
+            className="OSD"
+            namespace="osd"
+            application={App}
+            layer={Astal.Layer.OVERLAY}
+            keymode={Astal.Keymode.ON_DEMAND}
+            anchor={Astal.WindowAnchor.BOTTOM}
+        >
+            <eventbox onClick={() => visible.set(false)}>
+                <OnScreenProgress visible={visible} />
+            </eventbox>
+        </window>
+    )
+}
diff --git a/examples/gtk3/js/osd/osd/brightness.ts b/examples/gtk3/js/osd/osd/brightness.ts
new file mode 100644
index 0000000..cf5060a
--- /dev/null
+++ b/examples/gtk3/js/osd/osd/brightness.ts
@@ -0,0 +1,45 @@
+import GObject, { register, property } from "astal/gobject"
+import { monitorFile, readFileAsync } from "astal/file"
+import { exec, execAsync } from "astal/process"
+
+const get = (args: string) => Number(exec(`brightnessctl ${args}`))
+const screen = exec(`bash -c "ls -w1 /sys/class/backlight | head -1"`)
+
+@register({ GTypeName: "Brightness" })
+export default class Brightness extends GObject.Object {
+    static instance: Brightness
+    static get_default() {
+        if (!this.instance)
+            this.instance = new Brightness()
+
+        return this.instance
+    }
+
+    #screenMax = get("max")
+    #screen = get("get") / (get("max") || 1)
+
+    @property(Number)
+    get screen() { return this.#screen }
+
+    set screen(percent) {
+        if (percent < 0)
+            percent = 0
+
+        if (percent > 1)
+            percent = 1
+
+        execAsync(`brightnessctl set ${Math.floor(percent * 100)}% -q`).then(() => {
+            this.#screen = percent
+            this.notify("screen")
+        })
+    }
+
+    constructor() {
+        super()
+        monitorFile(`/sys/class/backlight/${screen}/brightness`, async f => {
+            const v = await readFileAsync(f)
+            this.#screen = Number(v) / this.#screenMax
+            this.notify("screen")
+        })
+    }
+}
diff --git a/examples/gtk3/js/osd/style.scss b/examples/gtk3/js/osd/style.scss
new file mode 100644
index 0000000..ba6f06d
--- /dev/null
+++ b/examples/gtk3/js/osd/style.scss
@@ -0,0 +1 @@
+@use "./osd/OSD.scss";