wip: Various refactorings and improvements

src/widget/nav_button.rs

@@ -0,0 +1,61 @@
+// Copyright 2022 System76 <info@system76.com>
+// SPDX-License-Identifier: MPL-2.0
+
+use apply::Apply;
+use derive_setters::Setters;
+use iced::{alignment::Vertical, Length};
+use crate::{Element, theme};
+
+#[derive(Setters)]
+pub struct NavButton<'a, Message> {
+    title: &'a str,
+    sidebar_active: bool,
+    #[setters(strip_option)]
+    on_sidebar_toggled: Option<Message>,
+}
+
+#[must_use]
+pub fn nav_button<Message>(title: &str) -> NavButton<Message> {
+    NavButton {
+        title,
+        sidebar_active: false,
+        on_sidebar_toggled: None,
+    }
+}
+
+impl<'a, Message: 'static + Clone> From<NavButton<'a, Message>> for Element<'a, Message> {
+    fn from(nav_button: NavButton<'a, Message>) -> Self {
+        let text = iced::widget::text(&nav_button.title)
+            .style(theme::Text::Accent)
+            .vertical_alignment(Vertical::Center)
+            .width(Length::Shrink)
+            .height(Length::Fill);
+
+        let icon = super::icon(
+            if nav_button.sidebar_active {
+                "go-previous-symbolic"
+            } else {
+                "go-next-symbolic"
+            },
+            24,
+        )
+        .style(theme::Svg::SymbolicActive)
+        .width(Length::Units(24))
+        .height(Length::Fill);
+
+        let mut widget = iced::widget::row!(text, crate::widget::vertical_rule(4), icon)
+            .padding(4)
+            .spacing(4)
+            .apply(iced::widget::button)
+            .style(theme::Button::Secondary);
+
+        if let Some(message) = nav_button.on_sidebar_toggled.clone() {
+            widget = widget.on_press(message);
+        }
+
+        widget.apply(iced::widget::container)
+            .center_y()
+            .height(Length::Fill)
+            .into()
+    }
+}