Add support for CI screenshot testing

Rework the high-level App & AppView widgets a bit to allow
conditionally displaying a simple fixed pattern if the
HOMESCREEN_DEMO_CI environment variable is set to anything
other than "0".  The pattern displayed matches what the
Qt homescreen shows for this to allow the CI test to be
common.

Bug-AGL: SPEC-5203

Change-Id: I36ed77c91304e3b6cdbce6a7350831d52d20d378
Signed-off-by: Scott Murray <scott.murray@konsulko.com>
(cherry picked from commit 25b6a079d5fe9c1365d776298ae5230a4de1ba16)

1 files changed, 20 insertions, 0 deletions

diff --git a/lib/presentation/screens/home/home_ci.dart b/lib/presentation/screens/home/home_ci.dart
new file mode 100644
index 0000000..8584420
--- /dev/null
+++ b/lib/presentation/screens/home/home_ci.dart
@@ -0,0 +1,20 @@
+import 'package:flutter_ics_homescreen/export.dart';
+
+// Simple fixed pattern homescreen for AGL CI screenshot testing
+
+class HomeScreenCI extends StatelessWidget {
+  const HomeScreenCI({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return Column(
+      children: [
+        // Note that the colors are specified with hex in order to match
+        // Qt's red/blue/green constants, which are different than Flutter's.
+        Container(width: 1080, height: 216, color: Color(0xFF0000FF)),
+        Container(width: 1080, height: 1488, color: Color(0xFFFF0000)),
+        Container(width: 1080, height: 216, color: Color(0xFF008000))
+      ],
+    );
+  }
+}