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|
//! Palette, metrics, egui Visuals/Style, and widget helpers.
use egui::{
pos2,
style::{ScrollStyle, WidgetVisuals},
Button, Color32, CornerRadius, CursorIcon, FontId, Frame, Label, Margin, Response, RichText,
Sense, Shadow, Shape, Stroke, StrokeKind, Style, TextBuffer, TextEdit, TextWrapMode, Ui, Vec2,
Visuals, WidgetInfo, WidgetType,
};
use crate::install_text_styles;
/// Light vs dark shell.
#[derive(Debug, Clone, Copy, PartialEq, Eq, Default)]
pub enum Mode {
#[default]
Dark,
Light,
}
/// Semantic colors.
#[derive(Debug, Clone)]
pub struct Palette {
pub window_bg: Color32,
pub view_bg: Color32,
pub headerbar_bg: Color32,
pub card_bg: Color32,
pub popover_bg: Color32,
pub shade: Color32,
pub accent: Color32,
pub accent_fg: Color32,
pub accent_hover: Color32,
pub accent_active: Color32,
pub destructive: Color32,
pub success: Color32,
pub warning: Color32,
pub text: Color32,
pub text_secondary: Color32,
pub text_disabled: Color32,
pub border: Color32,
pub border_soft: Color32,
pub button_bg: Color32,
pub button_hover: Color32,
pub button_active: Color32,
pub button_fg: Color32,
}
impl Palette {
pub fn dark() -> Self {
Self {
window_bg: rgb(0x24, 0x24, 0x24),
view_bg: rgb(0x1e, 0x1e, 0x1e),
headerbar_bg: rgb(0x30, 0x30, 0x30),
card_bg: rgb(0x30, 0x30, 0x30),
popover_bg: rgb(0x38, 0x38, 0x38),
shade: Color32::from_black_alpha(80),
accent: rgb(0x35, 0x84, 0xe4),
accent_fg: Color32::WHITE,
accent_hover: rgb(0x4a, 0x93, 0xe7),
accent_active: rgb(0x1c, 0x71, 0xd8),
destructive: rgb(0xc0, 0x1c, 0x28),
success: rgb(0x2e, 0xc2, 0x7e),
warning: rgb(0xe5, 0xa5, 0x0a),
text: rgb(0xff, 0xff, 0xff),
text_secondary: rgb(0x9a, 0x99, 0x96),
text_disabled: rgb(0x5e, 0x5c, 0x64),
border: rgb(0x5e, 0x5c, 0x64),
border_soft: rgb(0x3d, 0x38, 0x46),
button_bg: rgb(0x3d, 0x3d, 0x3d),
button_hover: rgb(0x4a, 0x4a, 0x4a),
button_active: rgb(0x35, 0x35, 0x35),
button_fg: rgb(0xff, 0xff, 0xff),
}
}
pub fn light() -> Self {
Self {
window_bg: rgb(0xfa, 0xfa, 0xfa),
view_bg: rgb(0xff, 0xff, 0xff),
headerbar_bg: rgb(0xff, 0xff, 0xff),
card_bg: rgb(0xff, 0xff, 0xff),
popover_bg: rgb(0xff, 0xff, 0xff),
shade: Color32::from_black_alpha(40),
accent: rgb(0x35, 0x84, 0xe4),
accent_fg: Color32::WHITE,
accent_hover: rgb(0x4a, 0x93, 0xe7),
accent_active: rgb(0x1c, 0x71, 0xd8),
destructive: rgb(0xc0, 0x1c, 0x28),
success: rgb(0x26, 0xa2, 0x69),
warning: rgb(0xe5, 0xa5, 0x0a),
text: rgb(0x24, 0x1f, 0x31),
text_secondary: rgb(0x5e, 0x5c, 0x64),
text_disabled: rgb(0x9a, 0x99, 0x96),
border: rgb(0xcd, 0xcd, 0xcd),
border_soft: rgb(0xe0, 0xe0, 0xe0),
button_bg: rgb(0xe0, 0xe0, 0xe0),
button_hover: rgb(0xd0, 0xd0, 0xd0),
button_active: rgb(0xc0, 0xc0, 0xc0),
button_fg: rgb(0x24, 0x1f, 0x31),
}
}
}
/// Spacing scale (HIG-ish: 6 / 12 / 18 / 24).
#[derive(Debug, Clone)]
pub struct Spacing {
pub xs: f32,
pub sm: f32,
pub md: f32,
pub lg: f32,
pub xl: f32,
pub page: f32,
pub control_height: f32,
/// Inner horizontal padding for text fields (egui default is only 4).
pub field_pad_x: f32,
/// Inner vertical padding for text fields (egui default is only 2).
pub field_pad_y: f32,
/// Gap between a form label and its control.
pub field_gap: f32,
pub radius_sm: f32,
pub radius_md: f32,
pub radius_lg: f32,
}
impl Default for Spacing {
fn default() -> Self {
Self {
xs: 4.0,
sm: 6.0,
md: 12.0,
lg: 18.0,
xl: 24.0,
page: 16.0,
control_height: 34.0,
field_pad_x: 12.0,
field_pad_y: 8.0,
field_gap: 12.0,
radius_sm: 6.0,
radius_md: 9.0,
radius_lg: 12.0,
}
}
}
/// Type sizes (UI sans scale).
#[derive(Debug, Clone)]
pub struct TypeScale {
pub title: f32,
pub title_2: f32,
pub title_3: f32,
pub body: f32,
pub caption: f32,
}
impl Default for TypeScale {
fn default() -> Self {
Self {
title: 20.0,
title_2: 16.0,
title_3: 14.0,
body: 14.0,
caption: 12.0,
}
}
}
/// Full theme bundle.
#[derive(Debug, Clone)]
pub struct Theme {
pub mode: Mode,
pub palette: Palette,
pub spacing: Spacing,
pub type_scale: TypeScale,
}
impl Theme {
pub fn dark() -> Self {
Self {
mode: Mode::Dark,
palette: Palette::dark(),
spacing: Spacing::default(),
type_scale: TypeScale::default(),
}
}
pub fn light() -> Self {
Self {
mode: Mode::Light,
palette: Palette::light(),
spacing: Spacing::default(),
type_scale: TypeScale::default(),
}
}
pub fn visuals(&self) -> Visuals {
let p = &self.palette;
let mut v = match self.mode {
Mode::Dark => Visuals::dark(),
Mode::Light => Visuals::light(),
};
v.dark_mode = self.mode == Mode::Dark;
v.override_text_color = Some(p.text);
v.hyperlink_color = p.accent;
v.warn_fg_color = p.warning;
v.error_fg_color = p.destructive;
v.extreme_bg_color = p.view_bg;
v.faint_bg_color = p.card_bg;
v.code_bg_color = p.popover_bg;
v.window_fill = p.window_bg;
v.panel_fill = p.window_bg;
v.window_stroke = Stroke::new(1.0_f32, p.border_soft);
v.window_corner_radius = CornerRadius::same(self.spacing.radius_md as u8);
v.window_shadow = Shadow {
offset: [0, 4],
blur: 16,
spread: 0,
color: p.shade,
};
v.popup_shadow = Shadow {
offset: [0, 2],
blur: 8,
spread: 0,
color: p.shade,
};
v.selection.bg_fill = p.accent.gamma_multiply(0.35);
v.selection.stroke = Stroke::new(1.0_f32, p.accent);
v.widgets = widget_visuals(p, &self.spacing);
// Browser-style click affordance: buttons (and apps that opt in) show a
// pointing-hand cursor on hover. egui defaults this to None (native toolkit
// style); Vidya prefers the clickable cue on desktop.
v.interact_cursor = Some(CursorIcon::PointingHand);
v
}
pub fn style(&self) -> Style {
let mut style = Style {
visuals: self.visuals(),
..Style::default()
};
install_text_styles(&mut style, &self.type_scale);
let sp = &self.spacing;
style.spacing.item_spacing = Vec2::new(sp.sm, sp.sm);
style.spacing.button_padding = Vec2::new(sp.md, sp.sm);
style.spacing.indent = sp.lg;
style.spacing.window_margin = Margin::same(sp.page as i8);
style.spacing.menu_margin = Margin::same(sp.sm as i8);
style.spacing.interact_size = Vec2::new(sp.control_height * 2.5, sp.control_height);
// Native checkbox / radio icons (prefer `checkbox()` for the themed control).
style.spacing.icon_width = 18.0;
style.spacing.icon_width_inner = 12.0;
style.spacing.icon_spacing = sp.sm + 2.0;
// Solid gutters: floating bars sit on top of content (egui default). HIG-ish
// scroll areas reserve space so lists/text never sit under the thumb.
style.spacing.scroll = ScrollStyle::solid();
// Prefer wrapping at the parent edge over extending (overflow) or hard
// truncate. Pair with layout helpers (`fit_width`, `card`, `hflow`) so
// rows actually receive a finite residual width.
style.wrap_mode = Some(TextWrapMode::Wrap);
// Default TextEdit desired width: fill parent residual (egui still
// clamps to available_width). Avoid the stock 280px “always this wide”
// intrinsic that pushes horizontal rows past the app view.
style.spacing.text_edit_width = 10_000.0;
style.interaction.tooltip_delay = 0.4;
style.animation_time = 0.12;
style
}
pub fn header_frame(&self) -> Frame {
Frame::new()
.fill(self.palette.headerbar_bg)
.inner_margin(Margin::symmetric(
self.spacing.page as i8,
self.spacing.md as i8,
))
.stroke(Stroke::new(1.0_f32, self.palette.border_soft))
}
pub fn card_frame(&self) -> Frame {
Frame::new()
.fill(self.palette.card_bg)
.corner_radius(self.spacing.radius_lg)
.inner_margin(Margin::same(self.spacing.md as i8))
.stroke(Stroke::new(1.0_f32, self.palette.border_soft))
}
pub fn page_frame(&self) -> Frame {
Frame::new()
.fill(self.palette.window_bg)
.inner_margin(Margin::same(self.spacing.page as i8))
}
/// Inner padding for [`TextEdit`] / form fields (HIG-ish; roomier than egui’s 4×2 default).
pub fn text_edit_margin(&self) -> Margin {
Margin::symmetric(
self.spacing.field_pad_x as i8,
self.spacing.field_pad_y as i8,
)
}
}
fn widget_visuals(p: &Palette, sp: &Spacing) -> egui::style::Widgets {
let r = CornerRadius::same(sp.radius_md as u8);
let soft = Stroke::new(1.0_f32, p.border_soft);
egui::style::Widgets {
noninteractive: WidgetVisuals {
bg_fill: p.card_bg,
weak_bg_fill: p.view_bg,
bg_stroke: soft,
corner_radius: r,
fg_stroke: Stroke::new(1.0_f32, p.text_secondary),
expansion: 0.0,
},
inactive: WidgetVisuals {
bg_fill: p.button_bg,
weak_bg_fill: p.button_bg,
bg_stroke: Stroke::new(1.0_f32, p.border_soft),
corner_radius: r,
fg_stroke: Stroke::new(1.0_f32, p.button_fg),
expansion: 0.0,
},
hovered: WidgetVisuals {
bg_fill: p.button_hover,
weak_bg_fill: p.button_hover,
bg_stroke: Stroke::new(1.0_f32, p.border),
corner_radius: r,
fg_stroke: Stroke::new(1.0_f32, p.text),
expansion: 0.0,
},
active: WidgetVisuals {
bg_fill: p.button_active,
weak_bg_fill: p.button_active,
bg_stroke: Stroke::new(1.0_f32, p.accent),
corner_radius: r,
fg_stroke: Stroke::new(1.0_f32, p.text),
expansion: 0.0,
},
open: WidgetVisuals {
bg_fill: p.popover_bg,
weak_bg_fill: p.popover_bg,
bg_stroke: Stroke::new(1.0_f32, p.border),
corner_radius: r,
fg_stroke: Stroke::new(1.0_f32, p.text),
expansion: 0.0,
},
}
}
/// Square tool button with a stroke/emoji [`crate::Icon`] (e.g. copy, plus).
///
/// Prefer this over text labels in tight rows — text wraps under
/// [`TextWrapMode::Wrap`] and looks broken at small widths.
pub fn icon_button(ui: &mut Ui, theme: &Theme, icon: crate::Icon, tip: &str) -> Response {
use crate::paint_icon_in;
let p = &theme.palette;
let size = theme.spacing.control_height;
let (rect, mut response) = ui.allocate_exact_size(Vec2::splat(size), Sense::click());
response = response.on_hover_text(tip);
if let Some(cursor) = ui.visuals().interact_cursor {
response = response.on_hover_cursor(cursor);
}
if ui.is_rect_visible(rect) {
let hovered = response.hovered() && ui.is_enabled();
let active = response.is_pointer_button_down_on();
let fill = if active {
p.button_active
} else if hovered {
p.button_hover
} else {
p.button_bg
};
let border = if hovered {
Stroke::new(1.0_f32, p.border)
} else {
Stroke::new(1.0_f32, p.border_soft)
};
ui.painter().rect(
rect,
theme.spacing.radius_md,
fill,
border,
StrokeKind::Inside,
);
let icon_size = size * 0.48;
let icon_rect = egui::Rect::from_center_size(rect.center(), Vec2::splat(icon_size));
paint_icon_in(ui, icon_rect, icon, p.button_fg);
}
response
}
/// Primary / suggested action (accent filled).
pub fn primary_button(ui: &mut Ui, theme: &Theme, label: &str) -> Response {
let p = &theme.palette;
let text = RichText::new(label)
.size(theme.type_scale.body)
.color(p.accent_fg);
let btn = Button::new(text)
.fill(p.accent)
.stroke(Stroke::NONE)
.corner_radius(theme.spacing.radius_md)
.min_size(Vec2::new(0.0, theme.spacing.control_height));
ui.add(btn)
}
/// Regular flat button.
pub fn button(ui: &mut Ui, theme: &Theme, label: &str) -> Response {
let p = &theme.palette;
let text = RichText::new(label)
.size(theme.type_scale.body)
.color(p.button_fg);
let btn = Button::new(text)
.fill(p.button_bg)
.stroke(Stroke::new(1.0_f32, p.border_soft))
.corner_radius(theme.spacing.radius_md)
.min_size(Vec2::new(0.0, theme.spacing.control_height));
ui.add(btn)
}
/// Destructive action.
pub fn destructive_button(ui: &mut Ui, theme: &Theme, label: &str) -> Response {
let p = &theme.palette;
let text = RichText::new(label)
.size(theme.type_scale.body)
.color(Color32::WHITE);
let btn = Button::new(text)
.fill(p.destructive)
.stroke(Stroke::NONE)
.corner_radius(theme.spacing.radius_md)
.min_size(Vec2::new(0.0, theme.spacing.control_height));
ui.add(btn)
}
/// Accent-filled checkbox with a drawn checkmark (stock egui looks janky here).
///
/// Unchecked: soft fill + border. Checked: solid accent tile + white stroke check.
pub fn checkbox(ui: &mut Ui, theme: &Theme, checked: &mut bool, text: &str) -> Response {
let p = &theme.palette;
let sp = &theme.spacing;
// Slightly larger than stock 16px so the check has room to breathe.
let box_size = 20.0_f32;
let gap = sp.sm + 4.0;
let galley = ui.fonts(|f| {
f.layout_no_wrap(
text.to_owned(),
FontId::proportional(theme.type_scale.body),
p.text,
)
});
let height = box_size
.max(galley.size().y + 4.0)
.max(sp.control_height * 0.85);
let width = box_size + gap + galley.size().x;
let (rect, mut response) = ui.allocate_exact_size(Vec2::new(width, height), Sense::click());
if response.clicked() {
*checked = !*checked;
response.mark_changed();
}
response.widget_info(|| {
WidgetInfo::selected(WidgetType::Checkbox, ui.is_enabled(), *checked, text)
});
// Custom widget — egui only applies `interact_cursor` on stock `Button`.
if let Some(cursor) = ui.visuals().interact_cursor {
response = response.on_hover_cursor(cursor);
}
if ui.is_rect_visible(rect) {
let painter = ui.painter();
let box_rect = egui::Rect::from_center_size(
pos2(rect.left() + box_size * 0.5, rect.center().y),
Vec2::splat(box_size),
);
// Squarer than widget radius_md (which nearly circles a 20px tile).
let radius = CornerRadius::same((sp.radius_sm * 0.85) as u8);
let hovered = response.hovered() && ui.is_enabled();
let (fill, border) = if *checked {
let fill = if hovered { p.accent_hover } else { p.accent };
(fill, Stroke::new(1.0_f32, fill))
} else if hovered {
(p.button_hover, Stroke::new(1.5_f32, p.border))
} else {
(p.button_bg, Stroke::new(1.25_f32, p.border_soft))
};
painter.rect(box_rect, radius, fill, border, StrokeKind::Inside);
if *checked {
// Refined check proportions (short leg → long arm), not stock’s steep V.
let s = box_size;
let o = box_rect.min;
let a = pos2(o.x + s * 0.22, o.y + s * 0.52);
let b = pos2(o.x + s * 0.42, o.y + s * 0.70);
let c = pos2(o.x + s * 0.78, o.y + s * 0.30);
// Slightly thicker tip stroke reads cleaner at small sizes.
painter.add(Shape::line(
vec![a, b, c],
Stroke::new(2.15_f32, p.accent_fg),
));
}
let text_pos = pos2(
rect.left() + box_size + gap,
rect.center().y - 0.5 * galley.size().y,
);
painter.galley(text_pos, galley, p.text);
}
response
}
/// Live / offline status mark drawn with shapes.
///
/// **Do not** use Unicode `●` / `○` in labels on Android: egui’s default fonts
/// often lack those glyphs and render a hollow box (“tofu”). This paints a real
/// circle instead — filled when `live`, stroked when offline.
pub fn status_dot(ui: &mut Ui, theme: &Theme, live: bool) -> Response {
let p = &theme.palette;
// Match body line height so the dot sits cleanly next to `body` text.
let line = theme.type_scale.body;
let diameter = (line * 0.55).clamp(7.0, 12.0);
let pad = 2.0;
let (rect, response) =
ui.allocate_exact_size(Vec2::new(diameter + pad * 2.0, line), Sense::hover());
if ui.is_rect_visible(rect) {
let center = pos2(rect.center().x, rect.center().y);
let radius = diameter * 0.5;
let color = if live { p.success } else { p.text_secondary };
let painter = ui.painter();
if live {
painter.circle_filled(center, radius, color);
} else {
painter.circle_stroke(center, radius, Stroke::new(1.5_f32, color));
}
}
response
}
/// The text styles.
///
/// None of them sets a wrap mode: a `Label` left alone takes the layout's,
/// which wraps in a column and extends in a row laid out without wrapping.
/// Forcing `.wrap()` instead made a label break its own text whenever a row
/// squeezed it — a status reading "joine/d", an unread count split down two
/// lines — for want of the width it asked for.
pub fn title(ui: &mut Ui, theme: &Theme, text: &str) {
ui.add(Label::new(
RichText::new(text)
.size(theme.type_scale.title)
.strong()
.color(theme.palette.text),
));
}
pub fn title_2(ui: &mut Ui, theme: &Theme, text: &str) {
ui.add(Label::new(
RichText::new(text)
.size(theme.type_scale.title_2)
.strong()
.color(theme.palette.text),
));
}
pub fn body(ui: &mut Ui, theme: &Theme, text: &str) {
ui.add(Label::new(
RichText::new(text)
.size(theme.type_scale.body)
.color(theme.palette.text),
));
}
pub fn dim_label(ui: &mut Ui, theme: &Theme, text: &str) {
ui.add(Label::new(
RichText::new(text)
.size(theme.type_scale.caption)
.color(theme.palette.text_secondary),
));
}
/// Single-line text field with theme field padding.
///
/// Desired width tracks the parent residual so the field fills its slot
/// instead of requesting a fixed 280px and clipping siblings off-screen.
pub fn text_field_singleline(ui: &mut Ui, theme: &Theme, text: &mut dyn TextBuffer) -> Response {
let w = ui.available_width().max(1.0);
ui.add(
TextEdit::singleline(text)
.margin(theme.text_edit_margin())
.desired_width(w)
.min_size(Vec2::new(0.0, theme.spacing.control_height)),
)
}
/// Multi-line text field with theme field padding.
///
/// Fills parent width (clamped by available space) so it stays inside the view.
pub fn text_field_multiline(
ui: &mut Ui,
theme: &Theme,
text: &mut dyn TextBuffer,
rows: usize,
) -> Response {
let w = ui.available_width().max(1.0);
ui.add(
TextEdit::multiline(text)
.margin(theme.text_edit_margin())
.desired_width(w)
.desired_rows(rows),
)
}
fn rgb(r: u8, g: u8, b: u8) -> Color32 {
Color32::from_rgb(r, g, b)
}
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