wire up message loading

src/message-list/message-list-view.vala

@@ -4,12 +4,31 @@ using Gee;
 
 public class MessageListView : Adw.Bin
 {
+    public MessageListModel? model {
+        get {
+            return _model;
+        }
+        set {
+            _model = value;
+
+            if (model != null) {
+                model.messages_changed.connect(reload_messages);
+                model.load_messages();
+            } else {
+                message_drawing_area.set_messages(new TreeSet<Message>());
+            }
+        }
+    }
+
+    private MessageListModel? _model = null;
     private Adw.ToolbarView container;
 
     private MessageDrawingArea message_drawing_area = new MessageDrawingArea();
     private ScrolledWindow scrolled_window = new ScrolledWindow();
 
-    public MessageListView(MessageListModel model) {
+    public MessageListView(MessageListModel? model = null) {
+        this.model = model;
+
         container = new Adw.ToolbarView();
         set_child(container);
 
@@ -20,14 +39,9 @@ public class MessageListView : Adw.Bin
         var header_bar = new Adw.HeaderBar();
         header_bar.set_title_widget(new Label("Messages"));
         container.add_top_bar(header_bar);
+    }
 
-        // Create test message set 
-        var messages = new TreeSet<Message>();
-        messages.add(new Message("Hello, world!", 1, "user"));
-        messages.add(new Message("How, are you?", 2, null));
-        messages.add(new Message("I'm fine, thank you!", 3, "user"));
-        messages.add(new Message("GTK also supports color expressions, which allow colors to be transformed to new ones and can be nested, providing a rich language to define colors. Color expressions resemble functions, taking 1 or more colors and in some cases a number as arguments.", 4, "user"));
-
-        message_drawing_area.set_messages(messages);
+    private void reload_messages() {
+        message_drawing_area.set_messages(_model.messages);
     }
 }