[connections/search-ux-fixups: 1/2] topbar: Only show search button when collection isn't empty

[Felipe Borges <felipeborges src gnome org>]

commit ddbb3e08c68e00221bd84e766f49deefa5e201dc
Author: Felipe Borges <felipeborges gnome org>
Date:   Mon May 3 15:42:51 2021 +0200

    topbar: Only show search button when collection isn't empty
    
    Fixes #40

 src/ui/topbar.ui | 2 +-
 src/window.vala  | 4 ++++
 2 files changed, 5 insertions(+), 1 deletion(-)
---
diff --git a/src/ui/topbar.ui b/src/ui/topbar.ui
index 946365f..71048a0 100644
--- a/src/ui/topbar.ui
+++ b/src/ui/topbar.ui
@@ -58,7 +58,7 @@
 
           <child>
             <object class="GtkToggleButton" id="search_button">
-              <property name="visible">True</property>
+              <property name="visible">False</property>
               <property name="use-underline">True</property>
               <property name="valign">center</property>
               <style>
diff --git a/src/window.vala b/src/window.vala
index 00b4435..df70030 100644
--- a/src/window.vala
+++ b/src/window.vala
@@ -71,6 +71,10 @@ namespace Connections {
 
         public void bind_model (ListModel model) {
             collection_view.bind_model (model);
+
+            model.items_changed.connect (() => {
+                topbar.search_button.visible = model.get_n_items () > 0;
+            });
         }
 
         public void items_changed () {