gui: fix navigation

src/gui/screens/account.rs

@@ -12,7 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-use crate::gui::App;
 use crate::gui::platform::PlatformCallbacks;
 use crate::gui::screens::{Navigator, ScreenId};
 
@@ -35,8 +34,8 @@ impl super::Screen for Account {
 
     fn show(&mut self,
             ui: &mut egui::Ui,
-            nav: Option<&mut Navigator>,
+            nav: &mut Navigator,
             cb: &dyn PlatformCallbacks) {
-        todo!()
+
     }
 }

src/gui/screens/accounts.rs

@@ -12,9 +12,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-use crate::gui::app::App;
 use crate::gui::platform::PlatformCallbacks;
-use crate::gui::screens::{Account, Navigator, Screen, ScreenId};
+use crate::gui::screens::{Navigator, Screen, ScreenId};
 use crate::gui::views::title_panel::TitlePanel;
 use crate::gui::views::View;
 
@@ -38,17 +37,14 @@ impl Screen for Accounts {
 
     fn show(&mut self,
             ui: &mut egui::Ui,
-            nav: Option<&mut Navigator>,
+            nav: &mut Navigator,
             cb: &dyn PlatformCallbacks) {
         TitlePanel::default()
             .title(self.title.to_owned())
             .ui(ui);
         if ui.button("test").clicked() {
-            nav.unwrap().to(ScreenId::Account)
+            nav.to(ScreenId::Account)
         };
-
-
-        //TODO: content
     }
 
 }

src/gui/screens/mod.rs

@@ -42,7 +42,7 @@ pub trait Screen {
     fn show(
         &mut self,
         ui: &mut egui::Ui,
-        navigator: Option<&mut Navigator>,
+        navigator: &mut Navigator,
         cb: &dyn PlatformCallbacks
     );
 }

src/gui/screens/navigator.rs

@@ -12,25 +12,25 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-
-
-
 use std::collections::BTreeSet;
-use crate::gui::platform::PlatformCallbacks;
-use crate::gui::screens::{Accounts, Screen, ScreenId};
+
+use crate::gui::screens::ScreenId;
 
 pub struct Navigator {
-    stack: BTreeSet<ScreenId>,
-    screens: Vec<Box<dyn Screen>>,
+    pub(crate) stack: BTreeSet<ScreenId>,
+}
+
+impl Default for Navigator {
+    fn default() -> Self {
+        let mut stack = BTreeSet::new();
+        stack.insert(ScreenId::Accounts);
+        Self {
+            stack
+        }
+    }
 }
 
 impl Navigator {
-    pub fn new(screens: Vec<Box<dyn Screen>>) -> Self {
-        let mut stack = BTreeSet::new();
-        stack.insert(ScreenId::Accounts);
-        Self { stack, screens }
-    }
-
     pub fn to(&mut self, id: ScreenId) {
         self.stack.insert(id);
     }
@@ -38,17 +38,4 @@ impl Navigator {
     pub fn back(&mut self) {
         self.stack.pop_last();
     }
-
-    pub fn get_current_screen(&mut self) -> Option<&Box<dyn Screen>> {
-        let Self { stack, screens } = self;
-        let current = stack.last().unwrap();
-        let mut result = screens.get(0);
-        for screen in screens.iter() {
-            if screen.id() == *current {
-                result = Some(screen);
-                break;
-            }
-        }
-        return result;
-    }
 }

src/gui/screens/root.rs

@@ -18,13 +18,14 @@ use crate::gui::screens::{Account, Accounts, Navigator, Screen, ScreenId};
 
 pub struct Root {
     navigator: Navigator,
-    // screens: Vec<Box<dyn Screen>>,
+    screens: Vec<Box<dyn Screen>>,
 }
 
 impl Default for Root {
     fn default() -> Self {
         Self {
-            navigator: Navigator::new(vec![
+            navigator: Navigator::new(),
+            screens: (vec![
                 Box::new(Accounts::default()),
                 Box::new(Account::default())
             ])
@@ -32,12 +33,25 @@ impl Default for Root {
     }
 }
 
-impl Screen for Root {
+impl Root {
     fn id(&self) -> ScreenId {
         ScreenId::Root
     }
 
-    fn show(&mut self, ui: &mut Ui, navigator: Option<&mut Navigator>, cb: &dyn PlatformCallbacks) {
-        let screen = self.navigator.get_current_screen();
+    pub fn ui(&mut self, ui: &mut Ui, cb: &dyn PlatformCallbacks) {
+        self.show_current_screen(ui, cb);
+    }
+
+    pub fn show_current_screen(&mut self,
+                               ui: &mut Ui,
+                               cb: &dyn PlatformCallbacks) {
+        let Self { navigator, screens } = self;
+        let current = navigator.stack.last().unwrap();
+        for screen in screens.iter_mut() {
+            if screen.id() == *current {
+                screen.show(ui, navigator, cb);
+                break;
+            }
+        }
     }
 }