Add custom palette to built in theme

examples/scrollable/src/main.rs

@@ -14,9 +14,15 @@ struct ScrollableDemo {
     variants: Vec<Variant>,
 }
 
+#[derive(Debug, PartialEq, Eq, Clone, Copy)]
+enum ThemeType {
+    Light,
+    Dark,
+}
+
 #[derive(Debug, Clone)]
 enum Message {
-    ThemeChanged(Theme),
+    ThemeChanged(ThemeType),
     ScrollToTop(usize),
     ScrollToBottom(usize),
     Scrolled(usize, f32),
@@ -45,7 +51,10 @@ impl Application for ScrollableDemo {
     fn update(&mut self, message: Message) -> Command<Message> {
         match message {
             Message::ThemeChanged(theme) => {
-                self.theme = theme;
+                self.theme = match theme {
+                    ThemeType::Light => Theme::Light,
+                    ThemeType::Dark => Theme::Dark,
+                };
 
                 Command::none()
             }
@@ -78,17 +87,15 @@ impl Application for ScrollableDemo {
     }
 
     fn view(&self) -> Element<Message> {
-        let ScrollableDemo {
-            theme, variants, ..
-        } = self;
+        let ScrollableDemo { variants, .. } = self;
 
-        let choose_theme = [Theme::Light, Theme::Dark].iter().fold(
+        let choose_theme = [ThemeType::Light, ThemeType::Dark].iter().fold(
             column!["Choose a theme:"].spacing(10),
             |column, option| {
                 column.push(radio(
                     format!("{:?}", option),
                     *option,
-                    Some(*theme),
+                    Some(*option),
                     Message::ThemeChanged,
                 ))
             },
@@ -198,7 +205,7 @@ impl Application for ScrollableDemo {
     }
 
     fn theme(&self) -> Theme {
-        self.theme
+        self.theme.clone()
     }
 }
 

examples/styling/src/main.rs

@@ -1,9 +1,10 @@
+use iced::theme::{self, Theme};
 use iced::widget::{
     button, checkbox, column, container, horizontal_rule, progress_bar, radio,
     row, scrollable, slider, text, text_input, toggler, vertical_rule,
     vertical_space,
 };
-use iced::{Alignment, Element, Length, Sandbox, Settings, Theme};
+use iced::{Alignment, Color, Element, Length, Sandbox, Settings};
 
 pub fn main() -> iced::Result {
     Styling::run(Settings::default())
@@ -18,9 +19,16 @@ struct Styling {
     toggler_value: bool,
 }
 
+#[derive(Debug, PartialEq, Eq, Clone, Copy)]
+enum ThemeType {
+    Light,
+    Dark,
+    Custom,
+}
+
 #[derive(Debug, Clone)]
 enum Message {
-    ThemeChanged(Theme),
+    ThemeChanged(ThemeType),
     InputChanged(String),
     ButtonPressed,
     SliderChanged(f32),
@@ -41,7 +49,19 @@ impl Sandbox for Styling {
 
     fn update(&mut self, message: Message) {
         match message {
-            Message::ThemeChanged(theme) => self.theme = theme,
+            Message::ThemeChanged(theme) => {
+                self.theme = match theme {
+                    ThemeType::Light => Theme::Light,
+                    ThemeType::Dark => Theme::Dark,
+                    ThemeType::Custom => Theme::custom(theme::Palette {
+                        background: Color::from_rgb(1.0, 0.9, 1.0),
+                        text: Color::BLACK,
+                        primary: Color::from_rgb(0.5, 0.5, 0.0),
+                        success: Color::from_rgb(0.0, 1.0, 0.0),
+                        danger: Color::from_rgb(1.0, 0.0, 0.0),
+                    }),
+                }
+            }
             Message::InputChanged(value) => self.input_value = value,
             Message::ButtonPressed => {}
             Message::SliderChanged(value) => self.slider_value = value,
@@ -51,17 +71,24 @@ impl Sandbox for Styling {
     }
 
     fn view(&self) -> Element<Message> {
-        let choose_theme = [Theme::Light, Theme::Dark].iter().fold(
-            column![text("Choose a theme:")].spacing(10),
-            |column, theme| {
-                column.push(radio(
-                    format!("{:?}", theme),
-                    *theme,
-                    Some(self.theme),
-                    Message::ThemeChanged,
-                ))
-            },
-        );
+        let choose_theme =
+            [ThemeType::Light, ThemeType::Dark, ThemeType::Custom]
+                .iter()
+                .fold(
+                    column![text("Choose a theme:")].spacing(10),
+                    |column, theme| {
+                        column.push(radio(
+                            format!("{:?}", theme),
+                            *theme,
+                            Some(match self.theme {
+                                Theme::Light => ThemeType::Light,
+                                Theme::Dark => ThemeType::Dark,
+                                Theme::Custom { .. } => ThemeType::Custom,
+                            }),
+                            Message::ThemeChanged,
+                        ))
+                    },
+                );
 
         let text_input = text_input(
             "Type something...",
@@ -132,6 +159,6 @@ impl Sandbox for Styling {
     }
 
     fn theme(&self) -> Theme {
-        self.theme
+        self.theme.clone()
     }
 }

style/src/theme.rs

@@ -1,5 +1,6 @@
 pub mod palette;
 
+use self::palette::Extended;
 pub use self::palette::Palette;
 
 use crate::application;
@@ -20,24 +21,31 @@ use crate::toggler;
 
 use iced_core::{Background, Color};
 
-#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+#[derive(Debug, Clone, PartialEq)]
 pub enum Theme {
     Light,
     Dark,
+    Custom(Box<Custom>),
 }
 
 impl Theme {
-    pub fn palette(self) -> Palette {
+    pub fn custom(palette: Palette) -> Self {
+        Self::Custom(Box::new(Custom::new(palette)))
+    }
+
+    pub fn palette(&self) -> Palette {
         match self {
             Self::Light => Palette::LIGHT,
             Self::Dark => Palette::DARK,
+            Self::Custom(custom) => custom.palette,
         }
     }
 
     pub fn extended_palette(&self) -> &palette::Extended {
         match self {
             Self::Light => &palette::EXTENDED_LIGHT,
             Self::Dark => &palette::EXTENDED_DARK,
+            Self::Custom(custom) => &custom.extended,
         }
     }
 }
@@ -48,6 +56,21 @@ impl Default for Theme {
     }
 }
 
+#[derive(Debug, Clone, Copy, PartialEq)]
+pub struct Custom {
+    palette: Palette,
+    extended: Extended,
+}
+
+impl Custom {
+    pub fn new(palette: Palette) -> Self {
+        Self {
+            palette,
+            extended: Extended::generate(palette),
+        }
+    }
+}
+
 #[derive(Debug, Clone, Copy)]
 pub enum Application {
     Default,
@@ -71,7 +94,7 @@ impl application::StyleSheet for Theme {
                 background_color: palette.background.base.color,
                 text_color: palette.background.base.text,
             },
-            Application::Custom(f) => f(*self),
+            Application::Custom(f) => f(self.clone()),
         }
     }
 }

style/src/theme/palette.rs

@@ -58,6 +58,7 @@ impl Palette {
     };
 }
 
+#[derive(Debug, Clone, Copy, PartialEq)]
 pub struct Extended {
     pub background: Background,
     pub primary: Primary,
@@ -95,7 +96,7 @@ impl Extended {
     }
 }
 
-#[derive(Debug, Clone, Copy)]
+#[derive(Debug, Clone, Copy, PartialEq)]
 pub struct Pair {
     pub color: Color,
     pub text: Color,
@@ -110,6 +111,7 @@ impl Pair {
     }
 }
 
+#[derive(Debug, Clone, Copy, PartialEq)]
 pub struct Background {
     pub base: Pair,
     pub weak: Pair,
@@ -129,6 +131,7 @@ impl Background {
     }
 }
 
+#[derive(Debug, Clone, Copy, PartialEq)]
 pub struct Primary {
     pub base: Pair,
     pub weak: Pair,
@@ -148,6 +151,7 @@ impl Primary {
     }
 }
 
+#[derive(Debug, Clone, Copy, PartialEq)]
 pub struct Secondary {
     pub base: Pair,
     pub weak: Pair,
@@ -168,6 +172,7 @@ impl Secondary {
     }
 }
 
+#[derive(Debug, Clone, Copy, PartialEq)]
 pub struct Success {
     pub base: Pair,
     pub weak: Pair,
@@ -187,6 +192,7 @@ impl Success {
     }
 }
 
+#[derive(Debug, Clone, Copy, PartialEq)]
 pub struct Danger {
     pub base: Pair,
     pub weak: Pair,