window: Add status pages

cartridges/ui/window.blp

@@ -47,6 +47,10 @@ template $Window: Adw.ApplicationWindow {
     Adw.NavigationPage {
       title: bind template.title;
 
+      styles [
+        "view",
+      ]
+
       child: Adw.ToolbarView {
         [top]
         Adw.HeaderBar {
@@ -125,7 +129,14 @@ template $Window: Adw.ApplicationWindow {
           }
         }
 
-        content: ScrolledWindow {
+        content: Adw.ViewStack {
+          enable-transitions: true;
+          visible-child-name: bind $_if_else(grid.model as <NoSelection>.n-items, "grid", $_if_else(template.search-text, "empty-search", $_if_else(template.show-hidden, "empty-hidden", "empty") as <string>) as <string>) as <string>;
+
+          Adw.ViewStackPage {
+            name: "grid";
+
+            child: ScrolledWindow {
               hscrollbar-policy: never;
 
               child: GridView grid {
@@ -183,10 +194,37 @@ template $Window: Adw.ApplicationWindow {
                 };
               };
             };
+          }
 
-        styles [
+          Adw.ViewStackPage {
-          "view",
+            name: "empty-search";
-        ]
+
+            child: Adw.StatusPage {
+              icon-name: "edit-find-symbolic";
+              title: _("No Games Found");
+              description: _("Try a different search");
+            };
+          }
+
+          Adw.ViewStackPage {
+            name: "empty-hidden";
+
+            child: Adw.StatusPage {
+              icon-name: "view-conceal-symbolic";
+              title: _("No Hidden Games");
+              description: _("Games you hide will appear here");
+            };
+          }
+
+          Adw.ViewStackPage {
+            name: "empty";
+
+            child: Adw.StatusPage {
+              icon-name: bind template.application as <Application>.application-id;
+              title: _("No Games");
+            };
+          }
+        };
       };
     }
 

cartridges/ui/window.py

@@ -6,7 +6,7 @@ import locale
 from collections.abc import Generator
 from datetime import UTC, datetime
 from gettext import gettext as _
-from typing import Any
+from typing import Any, TypeVar
 
 from gi.repository import Adw, Gdk, Gio, GLib, GObject, Gtk
 
@@ -25,6 +25,8 @@ SORT_MODES = {
     "oldest": ("added", True),
 }
 
+_T = TypeVar("_T")
+
 
 @Gtk.Template.from_resource(f"{PREFIX}/window.ui")
 class Window(Adw.ApplicationWindow):
@@ -83,6 +85,10 @@ class Window(Adw.ApplicationWindow):
             ),
         ))
 
+    @Gtk.Template.Callback()
+    def _if_else(self, _obj, condition: bool, first: _T, second: _T) -> _T:
+        return first if condition else second
+
     @Gtk.Template.Callback()
     def _activate_game(self, grid: Gtk.GridView, position: int):
         if isinstance(model := grid.props.model, Gio.ListModel):