factors out navigable trait

1 files changed, 9 insertions, 0 deletions

diff --git a/schist_desktop_gui/src/traits/navigable.rs b/schist_desktop_gui/src/traits/navigable.rs
new file mode 100644
index 0000000..2693230
--- /dev/null
+++ b/schist_desktop_gui/src/traits/navigable.rs
@@ -0,0 +1,9 @@
+pub trait Navigable<Option> {
+    fn move_next(&mut self) -> NavigationResult<Option>;
+    fn move_prev(&mut self) -> NavigationResult<Option>;
+}
+
+pub enum NavigationResult<Option> {
+    Moved(Option),
+    LastOption,
+}