feat: allow toggler to be disabled

Author: acolombier

iced

@@ -5,6 +5,7 @@
 
 use crate::theme::{CosmicComponent, Theme, TRANSPARENT_COMPONENT};
 use cosmic_theme::composite::over;
+use iced::color;
 use iced_core::{Background, Border, Color, Shadow, Vector};
 use iced_style::application;
 use iced_style::button as iced_button;
@@ -858,6 +859,29 @@ impl toggler::StyleSheet for Theme {
             ..self.active(style, is_active)
         }
     }
+
+    fn disabled(&self, style: &Self::Style, is_active: bool) -> toggler::Appearance {
+        let theme = self.cosmic();
+        const HANDLE_MARGIN: f32 = 2.0;
+        let background: Color = if is_active {
+            theme.accent.base.into()
+        } else {
+            theme.palette.neutral_5.into()
+        };
+        let foreground: Color = theme.palette.neutral_2.into();
+        toggler::Appearance {
+            background: Color::from_rgba(background.r, background.g, background.b, 0.5),
+            background_border: None,
+            foreground: Color::from_rgba(foreground.r, foreground.g, foreground.b, 0.5),
+            foreground_border: None,
+            border_radius: theme.radius_xl().into(),
+            handle_radius: theme
+                .radius_xl()
+                .map(|x| (x - HANDLE_MARGIN).max(0.0))
+                .into(),
+            handle_margin: HANDLE_MARGIN,
+        }
+    }
 }
 
 /*

src/theme/style/iced.rs

@@ -123,6 +123,6 @@ impl<'a, Message: 'static> Item<'a, Message> {
         is_checked: bool,
         message: impl Fn(bool) -> Message + 'static,
     ) -> Row<'a, Message> {
-        self.control(crate::widget::toggler(None, is_checked, message))
+        self.control(crate::widget::toggler(None, is_checked, Some(message)))
     }
 }

src/widget/settings/item.rs

@@ -7,7 +7,7 @@ use iced_core::text;
 pub fn toggler<'a, Message, Theme: iced_widget::toggler::StyleSheet, Renderer>(
     label: impl Into<Option<String>>,
     is_checked: bool,
-    f: impl Fn(bool) -> Message + 'a,
+    f: Option<impl Fn(bool) -> Message + 'a>,
 ) -> widget::Toggler<'a, Message, Theme, Renderer>
 where
     Renderer: iced_core::Renderer + text::Renderer,