library: add Libmanette entry

re.sonny.Workbench.Devel.json

@@ -71,6 +71,18 @@
         }
       ]
     },
+    {
+      "name": "libmanette",
+      "buildsystem": "meson",
+      "config-opts": ["-Dgudev=disabled"],
+      "builddir": true,
+      "sources": [
+        {
+          "type": "git",
+          "url": "https://gitlab.gnome.org/GNOME/libmanette.git"
+        }
+      ]
+    },
     {
       "name": "vls",
       "buildsystem": "meson",

src/Library/demos/Gamepads/main.blp

@@ -0,0 +1,23 @@
+using Gtk 4.0;
+using Adw 1;
+
+Stack stack {
+  visible-child: status_page;
+
+  Adw.StatusPage status_page {
+    title: _("Please connect a gamepad");
+    description: _("A controller is needed for this demo");
+    icon-name: "gamepad-symbolic";
+
+    Box {
+      orientation: vertical;
+      halign: center;
+
+      LinkButton {
+        label: "API Reference";
+        uri: "https://gnome.pages.gitlab.gnome.org/libmanette/";
+        margin-top: 24;
+      }
+    }
+  }
+}

src/Library/demos/Gamepads/main.js

@@ -0,0 +1,51 @@
+/* IMPORTANT: To use USB devices in your app you will need to set the --device=all permission.
+ Workbench doesn't have such permission by default so to run this example you have to run the command
+ flatpak override re.sonny.Workbench --device=all */
+
+import Gtk from "gi://Gtk";
+import Manette from "gi://Manette";
+
+const status_page = workbench.builder.get_object("status_page");
+
+const monitor = Manette.Monitor.new();
+const monitor_iter = monitor.iterate();
+
+// Iterate over the devices and log their details
+let [has_next, device] = monitor_iter.next();
+
+while (device !== null) {
+  console.log("Device:", device.get_name());
+
+  status_page.title = _("Controller connected");
+  status_page.description = "";
+
+  // Face and Shoulder Buttons
+  device.connect("button-press-event", (device, event) => {
+    console.log(
+      `Device: ${device.get_name()} pressed ${event.get_hardware_code()}`,
+    );
+
+    if (device.has_rumble()) {
+      device.rumble(1000, 1500, 200);
+    }
+  });
+
+  // D-pads
+  device.connect("hat-axis-event", (device, event) => {
+    const [, hat_axis, hat_value] = event.get_hat();
+    console.log(
+      `Device: ${device.get_name()} moved axis ${hat_axis} to ${hat_value}`,
+    );
+  });
+
+  // Analog Axis - Triggers and Joysticks
+  device.connect("absolute-axis-event", (device, event) => {
+    const [, axis, value] = event.get_absolute();
+    if (Math.abs(value) > 0.2)
+      console.log(
+        `Device: ${device.get_name()} moved axis ${axis} to ${value}`,
+      );
+  });
+
+  [has_next, device] = monitor_iter.next();
+}

src/Library/demos/Gamepads/main.json

@@ -0,0 +1,7 @@
+{
+  "name": "Gamepads",
+  "category": "controls",
+  "description": "Use Libmanette to access controllers and gamepads",
+  "panels": ["code", "preview"],
+  "autorun": false
+}