Added confirmation dialog

Author: leolost2605

src/application.vala

@@ -364,7 +364,9 @@ public class MyApp : Adw.Application {
             var bottom_end_box = new Gtk.Box (HORIZONTAL, 0) {halign = END};
             bottom_box.append (bottom_end_box);
 
-            var edit_subject_button = new EditSubjectButton (i) {margin_end = 20};
+            var edit_subject_button = new EditSubjectButton (i) {
+                    icon_name = "document-edit-symbolic"
+                };
             bottom_end_box.append (edit_subject_button);
 
 

src/edit-subject-button.vala

@@ -2,7 +2,6 @@ public class EditSubjectButton : Gtk.Button {
     public int index;
 
     public EditSubjectButton (int i) {
-        label = "Edit this subject";
         index = i;
         halign = END;
     }

src/edit-subject-dialog.vala

@@ -48,7 +48,12 @@ public class EditSubjectDialog : Gtk.Dialog {
         };
         bottom_box.append (new_cat_button);
 
+
+        main_box.append(new Gtk.Separator(HORIZONTAL));
+
+
         var bottom_delete_box = new Gtk.Box (HORIZONTAL, 0) {
+            margin_top = 20,
             margin_start = 20,
             margin_end = 20,
             margin_bottom = 20,
@@ -63,7 +68,23 @@ public class EditSubjectDialog : Gtk.Dialog {
         bottom_delete_box.append(subject_delete_button);
 
         subject_delete_button.clicked.connect (() => {
-                subject = null;
+                string n = s.name;
+                var message_dialog = new Adw.MessageDialog(this, @"Are you sure you want to delete $n?", null);
+                message_dialog.add_response("0", "Cancel");
+                message_dialog.add_response("1", "Yes");
+                message_dialog.set_response_appearance("1", DESTRUCTIVE);
+                message_dialog.present();
+                message_dialog.response.connect ((id) => {
+                        switch (id) {
+                            case "0":
+                                break;
+                            case "1":
+                                subject = null;
+
+                                this.response(Gtk.ResponseType.ACCEPT);
+                                break;
+                            }
+                    });
             });
 
         new_cat_button.clicked.connect (() => {