use gpui::{AnyView, ClickEvent}; use crate::{ButtonLike, ButtonLikeRounding, ElevationIndex, prelude::*}; /// The position of a [`ToggleButton`] within a group of buttons.#[derive(Debug, PartialEq, Eq, Clone, Copy)]pub enum ToggleButtonPosition {    /// The toggle button is first in the group.    First,     /// The toggle button is in the middle of the group (i.e., it is not the first or last toggle button).    Middle,     /// The toggle button is last in the group.    Last,} #[derive(IntoElement, RegisterComponent)]pub struct ToggleButton {    base: ButtonLike,    position_in_group: Option<ToggleButtonPosition>,    label: SharedString,    label_color: Option<Color>,} impl ToggleButton {    pub fn new(id: impl Into<ElementId>, label: impl Into<SharedString>) -> Self {        Self {            base: ButtonLike::new(id),            position_in_group: None,            label: label.into(),            label_color: None,        }    }     pub fn color(mut self, label_color: impl Into<Option<Color>>) -> Self {        self.label_color = label_color.into();        self    }     pub fn position_in_group(mut self, position: ToggleButtonPosition) -> Self {        self.position_in_group = Some(position);        self    }     pub fn first(self) -> Self {        self.position_in_group(ToggleButtonPosition::First)    }     pub fn middle(self) -> Self {        self.position_in_group(ToggleButtonPosition::Middle)    }     pub fn last(self) -> Self {        self.position_in_group(ToggleButtonPosition::Last)    }} impl Toggleable for ToggleButton {    fn toggle_state(mut self, selected: bool) -> Self {        self.base = self.base.toggle_state(selected);        self    }} impl SelectableButton for ToggleButton {    fn selected_style(mut self, style: ButtonStyle) -> Self {        self.base.selected_style = Some(style);        self    }} impl FixedWidth for ToggleButton {    fn width(mut self, width: DefiniteLength) -> Self {        self.base.width = Some(width);        self    }     fn full_width(mut self) -> Self {        self.base.width = Some(relative(1.));        self    }} impl Disableable for ToggleButton {    fn disabled(mut self, disabled: bool) -> Self {        self.base = self.base.disabled(disabled);        self    }} impl Clickable for ToggleButton {    fn on_click(mut self, handler: impl Fn(&ClickEvent, &mut Window, &mut App) + 'static) -> Self {        self.base = self.base.on_click(handler);        self    }     fn cursor_style(mut self, cursor_style: gpui::CursorStyle) -> Self {        self.base = self.base.cursor_style(cursor_style);        self    }} impl ButtonCommon for ToggleButton {    fn id(&self) -> &ElementId {        self.base.id()    }     fn style(mut self, style: ButtonStyle) -> Self {        self.base = self.base.style(style);        self    }     fn size(mut self, size: ButtonSize) -> Self {        self.base = self.base.size(size);        self    }     fn tooltip(mut self, tooltip: impl Fn(&mut Window, &mut App) -> AnyView + 'static) -> Self {        self.base = self.base.tooltip(tooltip);        self    }     fn layer(mut self, elevation: ElevationIndex) -> Self {        self.base = self.base.layer(elevation);        self    }} impl RenderOnce for ToggleButton {    fn render(self, _window: &mut Window, _cx: &mut App) -> impl IntoElement {        let is_disabled = self.base.disabled;        let is_selected = self.base.selected;         let label_color = if is_disabled {            Color::Disabled        } else if is_selected {            Color::Selected        } else {            self.label_color.unwrap_or_default()        };         self.base            .when_some(self.position_in_group, |this, position| match position {                ToggleButtonPosition::First => this.rounding(ButtonLikeRounding::Left),                ToggleButtonPosition::Middle => this.rounding(None),                ToggleButtonPosition::Last => this.rounding(ButtonLikeRounding::Right),            })            .child(                Label::new(self.label)                    .color(label_color)                    .line_height_style(LineHeightStyle::UiLabel),            )    }} impl Component for ToggleButton {    fn scope() -> ComponentScope {        ComponentScope::Input    }     fn sort_name() -> &'static str {        "ButtonC"    }     fn preview(_window: &mut Window, _cx: &mut App) -> Option<AnyElement> {        Some(            v_flex()                .gap_6()                .children(vec![                    example_group_with_title(                        "Button Styles",                        vec![                            single_example(                                "Off",                                ToggleButton::new("off", "Off")                                    .layer(ElevationIndex::Background)                                    .style(ButtonStyle::Filled)                                    .into_any_element(),                            ),                            single_example(                                "On",                                ToggleButton::new("on", "On")                                    .layer(ElevationIndex::Background)                                    .toggle_state(true)                                    .style(ButtonStyle::Filled)                                    .into_any_element(),                            ),                            single_example(                                "Off – Disabled",                                ToggleButton::new("disabled_off", "Disabled Off")                                    .layer(ElevationIndex::Background)                                    .disabled(true)                                    .style(ButtonStyle::Filled)                                    .into_any_element(),                            ),                            single_example(                                "On – Disabled",                                ToggleButton::new("disabled_on", "Disabled On")                                    .layer(ElevationIndex::Background)                                    .disabled(true)                                    .toggle_state(true)                                    .style(ButtonStyle::Filled)                                    .into_any_element(),                            ),                        ],                    ),                    example_group_with_title(                        "Button Group",                        vec![                            single_example(                                "Three Buttons",                                h_flex()                                    .child(                                        ToggleButton::new("three_btn_first", "First")                                            .layer(ElevationIndex::Background)                                            .style(ButtonStyle::Filled)                                            .first()                                            .into_any_element(),                                    )                                    .child(                                        ToggleButton::new("three_btn_middle", "Middle")                                            .layer(ElevationIndex::Background)                                            .style(ButtonStyle::Filled)                                            .middle()                                            .toggle_state(true)                                            .into_any_element(),                                    )                                    .child(                                        ToggleButton::new("three_btn_last", "Last")                                            .layer(ElevationIndex::Background)                                            .style(ButtonStyle::Filled)                                            .last()                                            .into_any_element(),                                    )                                    .into_any_element(),                            ),                            single_example(                                "Two Buttons",                                h_flex()                                    .child(                                        ToggleButton::new("two_btn_first", "First")                                            .layer(ElevationIndex::Background)                                            .style(ButtonStyle::Filled)                                            .first()                                            .into_any_element(),                                    )                                    .child(                                        ToggleButton::new("two_btn_last", "Last")                                            .layer(ElevationIndex::Background)                                            .style(ButtonStyle::Filled)                                            .last()                                            .into_any_element(),                                    )                                    .into_any_element(),                            ),                        ],                    ),                    example_group_with_title(                        "Alternate Sizes",                        vec![                            single_example(                                "None",                                ToggleButton::new("none", "None")                                    .layer(ElevationIndex::Background)                                    .style(ButtonStyle::Filled)                                    .size(ButtonSize::None)                                    .into_any_element(),                            ),                            single_example(                                "Compact",                                ToggleButton::new("compact", "Compact")                                    .layer(ElevationIndex::Background)                                    .style(ButtonStyle::Filled)                                    .size(ButtonSize::Compact)                                    .into_any_element(),                            ),                            single_example(                                "Large",                                ToggleButton::new("large", "Large")                                    .layer(ElevationIndex::Background)                                    .style(ButtonStyle::Filled)                                    .size(ButtonSize::Large)                                    .into_any_element(),                            ),                        ],                    ),                ])                .into_any_element(),        )    }}