Add no cards notification

src/ui/cards/edit/imp.rs

@@ -174,7 +174,6 @@ async fn file_choose_dialog<W: IsA<gtk::Window>>(window: Rc<W>) {
             _ => panic!("Could not create directory for storing images!"),
         },
     };
-    println!("Setting handler");
     w.get_done_button().connect_closure(
         "clicked",
         false,
@@ -189,8 +188,6 @@ async fn file_choose_dialog<W: IsA<gtk::Window>>(window: Rc<W>) {
             let reading = w.get_reading_input();
             let conn = Connection::open(get_db_path()).unwrap();
 
-            println!("INSERTING NEW IMAGE");
-
             let query = "INSERT INTO cards (imagename, hieroglyph, reading) VALUES(?1, ?2, ?3)";
             conn.execute(query, (&new_filename, &hieroglyph, &reading)).unwrap();      
             w.close();

src/ui/cards/game/imp.rs

@@ -6,7 +6,7 @@ use glib::subclass::InitializingObject;
 use gtk::glib::clone;
 use gtk::subclass::prelude::*;
 use gtk::{prelude::*, Entry};
-use gtk::{glib, CompositeTemplate, Label};
+use gtk::{glib, CompositeTemplate, Label, Box};
 
 #[derive(CompositeTemplate, Default)]
 #[template(resource = "/org/foxarmy/learn-hieroglyph/cards/game/ui.xml")]
@@ -15,6 +15,8 @@ pub struct MemoryCardsGameScene {
     pub card_display: TemplateChild<CardDisplay>,
     #[template_child]
     pub stats_label: TemplateChild<Label>,
+    #[template_child]
+    pub content: TemplateChild<Box>,
 
     pub correct: RefCell<usize>,
     pub incorrect: RefCell<usize>
@@ -42,7 +44,17 @@ impl ObjectImpl for MemoryCardsGameScene {
         let card_display_binding = self.card_display.imp().obj();
         let self_binding = self.obj();
 
-        card_display_binding.generate_card();
+        match card_display_binding.generate_card() {
+            Some(_) => (),
+            None => {
+                while self.content.first_child() != None {
+                    self.content.remove(&self.content.first_child().unwrap());
+                }
+                self.content.append(&Label::builder().label("No cards found. Please, add some.").build());
+                return
+            }
+        };
+        
         card_display_binding.get_answer_entry().connect_activate(clone!(@strong card_display_binding, @strong self_binding => move |e: &Entry| {
             println!("{}", e.text());
             println!("{} = {}? -> {}", e.text(), card_display_binding.get_hieroglyph(), e.text().to_string() == *card_display_binding.get_hieroglyph());