Add GOM demo

src/Gom/main.blp

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+using Gtk 4.0;
+using Adw 1;
+
+Adw.ToastOverlay overlay {
+  Adw.StatusPage {
+    title: _("GOM Demo");
+    description: _("Simple database operations using GOM");
+
+    Box {
+      orientation: vertical;
+      halign: center;
+      spacing: 18;
+
+      Box {
+        styles [
+          "linked"
+        ]
+
+        Entry text_entry {
+          placeholder-text: _("Enter Text");
+          width-request: 300;
+        }
+
+        Button insert_button {
+          label: _("Insert");
+        }
+      }
+
+      Box {
+        orientation: horizontal;
+        spacing: 18;
+
+        Box {
+          orientation: vertical;
+          spacing: 12;
+
+          Label {
+            label: _("Search by Text");
+          }
+
+          SearchEntry search_entry {
+            search-delay: 100;
+            placeholder-text: _("Enter Text");
+            width-request: 250;
+          }
+        }
+
+        Box {
+          spacing: 12;
+          orientation: vertical;
+
+          Label {
+            label: _("Search by ID");
+          }
+
+          SpinButton id_entry {
+            halign: center;
+            orientation: horizontal;
+            wrap: false;
+            climb-rate: 1;
+
+            adjustment: Adjustment {
+              step-increment: 1;
+              value: 0;
+            };
+          }
+        }
+      }
+
+      Frame {
+        ColumnView column_view {
+          show-column-separators: true;
+
+          ColumnViewColumn col1 {
+            title: _("Text");
+            expand: true;
+
+            factory: SignalListItemFactory {};
+          }
+
+          ColumnViewColumn col2 {
+            title: _("ID");
+            expand: true;
+
+            factory: SignalListItemFactory {};
+          }
+        }
+      }
+
+      Label result_label {
+        wrap: true;
+        width-request: 250;
+      }
+    }
+  }
+}

src/Gom/main.js

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+import GObject from "gi://GObject";
+import Gom from "gi://Gom";
+import Gtk from "gi://Gtk";
+import Adw from "gi://Adw";
+import GLib from "gi://GLib";
+import Gio from "gi://Gio";
+
+const ItemClass = GObject.registerClass(
+  {
+    GTypeName: "Item",
+    Properties: {
+      id: GObject.ParamSpec.int(
+        "id",
+        "ID",
+        "An ID",
+        GObject.ParamFlags.READWRITE | GObject.ParamFlags.CONSTRUCT,
+        0,
+        GLib.MAXINT32,
+        0,
+      ),
+      url: GObject.ParamSpec.string(
+        "url",
+        "URL",
+        "A URL",
+        GObject.ParamFlags.READWRITE | GObject.ParamFlags.CONSTRUCT,
+        "",
+      ),
+    },
+  },
+  class ItemClass extends Gom.Resource { },
+);
+
+let adapter, repository;
+
+function initDatabase() {
+  adapter = new Gom.Adapter();
+  adapter.open_sync(":memory:");
+  repository = new Gom.Repository({ adapter: adapter });
+
+  // Set up table and primary key
+  ItemClass.set_table("items");
+  ItemClass.set_primary_key("id");
+
+  // Perform automatic migration
+  repository.automatic_migrate_sync(1, [ItemClass]);
+}
+
+function closeDatabase() {
+  if (adapter) {
+    adapter.close_sync();
+  }
+}
+
+function showToast(overlay, message) {
+  const toast = new Adw.Toast({
+    title: message,
+    timeout: 2,
+  });
+  overlay.add_toast(toast);
+}
+
+initDatabase();
+
+const text_entry = workbench.builder.get_object("text_entry");
+const id_entry = workbench.builder.get_object("id_entry");
+const insert_button = workbench.builder.get_object("insert_button");
+const search_entry = workbench.builder.get_object("search_entry");
+const result_label = workbench.builder.get_object("result_label");
+const overlay = workbench.builder.get_object("overlay");
+const data_model = new Gio.ListStore({ item_type: ItemClass });
+const column_view = workbench.builder.get_object("column_view");
+const col1 = workbench.builder.get_object("col1");
+const col2 = workbench.builder.get_object("col2");
+var count = 0;
+
+insert_button.connect("clicked", () => {
+  const url = text_entry.text;
+  const item = new ItemClass({ repository: repository, url: url });
+  const success = item.save_sync();
+
+  if (success) {
+    showToast(overlay, "Item inserted successfully");
+    data_model.append(item);
+    id_entry.set_range(1, ++count);
+  } else {
+    showToast(overlay, "Failed to insert item");
+  }
+});
+
+id_entry.connect("value-changed", () => {
+  data_model.remove_all();
+  const id = parseInt(id_entry.text);
+  const filter = Gom.Filter.new_eq(ItemClass, "id", id);
+  const found_item = repository.find_one_sync(ItemClass, filter);
+  if (found_item) {
+    data_model.append(found_item);
+  } else {
+    result_label.label = "Item not found";
+  }
+});
+
+search_entry.connect("search-changed", () => {
+  data_model.remove_all();
+  const filter_text = search_entry.text.trim();
+  if (filter_text === "") {
+    result_label.label = "";
+    return;
+  }
+  // Create a filter for Text matching
+  const filter = Gom.Filter.new_glob(ItemClass, "url", `*${filter_text}*`);
+  const filtered_items = repository.find_sync(ItemClass, filter);
+
+  if (filtered_items && filtered_items.get_count() > 0) {
+    filtered_items.fetch_async(0, filtered_items.get_count(), () => {
+      for (let i = 0; i < filtered_items.get_count(); i++) {
+        const item = filtered_items.get_index(i);
+        if (item) data_model.append(item);
+      }
+      result_label.label = "Loaded successfully";
+    });
+  } else {
+    result_label.label = "No matching items found";
+  }
+});
+
+const factory_col1 = col1.factory;
+
+factory_col1.connect("setup", (_self, list_item) => {
+  const label = new Gtk.Label({
+    margin_start: 12,
+    margin_end: 12,
+  });
+  list_item.set_child(label);
+});
+
+factory_col1.connect("bind", (_self, list_item) => {
+  const label_widget = list_item.get_child();
+  const model_item = list_item.get_item();
+  label_widget.label = model_item.url;
+});
+
+const factory_col2 = col2.factory;
+factory_col2.connect("setup", (_self, list_item) => {
+  const label = new Gtk.Label({
+    margin_start: 12,
+    margin_end: 12,
+  });
+  list_item.set_child(label);
+});
+
+factory_col2.connect("bind", (_self, list_item) => {
+  const label_widget = list_item.get_child();
+  const model_item = list_item.get_item();
+  label_widget.label = model_item.id.toString();
+});
+
+column_view.model = new Gtk.SingleSelection({
+  model: data_model,
+});

src/Gom/main.json

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+{
+  "category": "platform",
+  "description": "Search, load and store GObjects in a SQLite database",
+  "panels": ["ui", "preview"],
+  "autorun": true
+}