Resolves #204 Alarm panel card support

lib/ui_widgets/card_header_widget.dart

@@ -3,14 +3,18 @@ part of '../main.dart';
 class CardHeaderWidget extends StatelessWidget {
 
   final String name;
+  final Widget trailing;
+  final Widget subtitle;
 
-  const CardHeaderWidget({Key key, this.name}) : super(key: key);
+  const CardHeaderWidget({Key key, this.name, this.trailing, this.subtitle}) : super(key: key);
 
   @override
   Widget build(BuildContext context) {
     var result;
     if ((name != null) && (name.trim().length > 0)) {
       result = new ListTile(
+        trailing: trailing,
+        subtitle: subtitle,
         title: Text("$name",
             textAlign: TextAlign.left,
             overflow: TextOverflow.ellipsis,

lib/ui_widgets/card_widget.dart

@@ -37,6 +37,10 @@ class CardWidget extends StatelessWidget {
         return _buildMarkdownCard(context);
       }
 
+      case CardType.alarmPanel: {
+        return _buildAlarmPanelCard(context);
+      }
+
       case CardType.horizontalStack: {
         if (card.childCards.isNotEmpty) {
           List<Widget> children = [];
@@ -128,6 +132,42 @@ class CardWidget extends StatelessWidget {
     );
   }
 
+  Widget _buildAlarmPanelCard(BuildContext context) {
+    if (card.linkedEntityWrapper == null || card.linkedEntityWrapper.entity == null) {
+      return Container(width: 0, height: 0,);
+    } else {
+      List<Widget> body = [];
+      body.add(CardHeaderWidget(
+        name: card.name ?? "",
+        subtitle: Text("${card.linkedEntityWrapper.entity.displayState}",
+          style: TextStyle(
+            color: Colors.grey
+          ),
+        ),
+        trailing: EntityIcon(
+          iconSize: 50.0,
+        ),
+      ));
+      body.add(
+        AlarmControlPanelControlsWidget(
+          extended: true,
+          states: card.states,
+        )
+      );
+      return Card(
+        child: EntityModel(
+          entityWrapper: card.linkedEntityWrapper,
+          handleTap: null,
+          child: Column(
+              crossAxisAlignment: CrossAxisAlignment.center,
+              mainAxisSize: MainAxisSize.min,
+              children: body
+          )
+        )
+      );
+    }
+  }
+
   Widget _buildGlanceCard(BuildContext context) {
     List<EntityWrapper> entitiesToShow = card.getEntitiesToShow();
     if (entitiesToShow.isEmpty && !card.showEmpty) {