add no sidebar example

Author: genusistimelord

examples/tabs_noshow.rs

@@ -0,0 +1,91 @@
+use iced::{
+    Element, Length, Task,
+    widget::{button, column, container, stack, text},
+};
+use iced_aw::{
+    sidebar::{SidebarPosition, TabLabel},
+    widget::SidebarWithContent,
+};
+use std::fmt;
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Default)]
+enum TabId {
+    #[default]
+    One,
+    Two,
+}
+
+impl TabId {
+    const ALL: [Self; 2] = [Self::One, Self::Two];
+}
+
+impl fmt::Display for TabId {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            Self::One => f.write_str("One"),
+            Self::Two => f.write_str("Two"),
+        }
+    }
+}
+
+#[derive(Debug, Clone)]
+enum Message {
+    ToggleError,
+    TabSelected(TabId),
+}
+
+#[derive(Default)]
+struct App {
+    active_tab: TabId,
+    show_error: bool,
+}
+
+impl App {
+    fn update(&mut self, message: Message) -> Task<Message> {
+        match message {
+            Message::ToggleError => {
+                self.show_error = !self.show_error;
+            }
+            Message::TabSelected(tab) => {
+                self.active_tab = tab;
+            }
+        }
+        Task::none()
+    }
+
+    fn view(&self) -> Element<'_, Message> {
+        let mut sidebar = SidebarWithContent::new(Message::TabSelected);
+        for tab in TabId::ALL {
+            let label = TabLabel::Text(tab.to_string());
+            let view: Element<'_, Message> = column![
+                text(format!("Tab: {tab}")),
+                button("Toggle Error").on_press(Message::ToggleError)
+            ]
+            .spacing(10)
+            .padding(10)
+            .into();
+            sidebar = sidebar.push(tab, label, view);
+        }
+
+        let content: Element<'_, Message> = sidebar
+            .set_active_tab(&self.active_tab)
+            .sidebar_position(SidebarPosition::Start)
+            .into();
+
+        if self.show_error {
+            let overlay = container(text("Error"))
+                .width(Length::Fill)
+                .height(Length::Fill)
+                .center_x(Length::Fill)
+                .center_y(Length::Fill);
+            stack![content, overlay].into()
+        } else {
+            // This change in root widget type causes a panic in iced_aw::SidebarWithContent
+            content
+        }
+    }
+}
+
+fn main() -> iced::Result {
+    iced::application(App::default, App::update, App::view).run()
+}