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// SPDX-FileCopyrightText: 2026 Patrick Gaskin
// SPDX-License-Identifier: AGPL-3.0-or-later
use windy_wallpaper_core::{Config, Theme};
pub struct ThemeEditor {
pub name: String,
pub slow_wind_color: [f32; 4],
pub fast_wind_color: [f32; 4],
pub bg_color1: [f32; 4],
pub bg_color2: [f32; 4],
pub wind_speed: f32,
pub particle_life: f32,
pub particle_opacity: f32,
pub line_half_width: f32,
pub alpha_decay: f32,
pub particle_count: u32,
pub window_size: f32,
pub scale: [f32; 2],
pub open: bool,
actions: Actions,
}
#[derive(Default)]
pub struct Actions {
pub restart: bool,
pub time_skip: bool,
}
impl ThemeEditor {
pub fn from_theme(theme: &Theme) -> Self {
Self::from_config(theme.name, &Config::with_theme(theme))
}
pub fn from_config(name: &str, c: &Config) -> Self {
Self {
name: name.to_string(),
slow_wind_color: c.slow_wind_color,
fast_wind_color: c.fast_wind_color,
bg_color1: c.bg_color1,
bg_color2: c.bg_color2,
wind_speed: c.wind_speed,
particle_life: c.particle_life,
particle_opacity: c.particle_opacity,
line_half_width: c.line_half_width,
alpha_decay: c.alpha_decay,
particle_count: c.particle_count,
window_size: c.window_size,
scale: c.scale,
open: true,
actions: Actions {
restart: false,
time_skip: false,
},
}
}
pub fn take_actions(&mut self) -> Actions {
Actions {
restart: std::mem::take(&mut self.actions.restart),
time_skip: std::mem::take(&mut self.actions.time_skip),
}
}
pub fn to_config(&self) -> Config {
Config {
window_size: self.window_size,
scale: self.scale,
particle_count: self.particle_count,
wind_speed: self.wind_speed,
particle_life: self.particle_life,
slow_wind_color: self.slow_wind_color,
fast_wind_color: self.fast_wind_color,
bg_color1: self.bg_color1,
bg_color2: self.bg_color2,
particle_opacity: self.particle_opacity,
line_half_width: self.line_half_width,
alpha_decay: self.alpha_decay,
..Config::default()
}
}
fn load_theme(&mut self, theme: &Theme) {
let keep_open = self.open;
*self = Self::from_theme(theme);
self.open = keep_open;
}
pub fn ui(&mut self, ctx: &egui::Context) -> bool {
if !self.open {
return false;
}
let mut changed = false;
egui::Window::new("Theme")
.default_pos([12.0, 12.0])
.title_bar(false)
.resizable(false)
.show(ctx, |ui| {
let max_h = (ctx.content_rect().height() - 36.0).max(120.0);
egui::ScrollArea::vertical()
.max_height(max_h)
.show(ui, |ui| {
ui.horizontal(|ui| {
let mut chosen: Option<&Theme> = None;
egui::ComboBox::from_id_salt("preset")
.selected_text(&self.name)
.show_ui(ui, |ui| {
for t in Theme::ALL {
if ui
.selectable_label(self.name == t.name, t.name)
.clicked()
{
chosen = Some(t);
}
}
});
if let Some(t) = chosen {
self.load_theme(t);
changed = true;
}
ui.add(
egui::TextEdit::singleline(&mut self.name)
.hint_text("name")
.desired_width(120.0),
);
if ui.button("Restart").clicked() {
self.actions.restart = true;
}
if ui.button("Time skip").clicked() {
self.actions.time_skip = true;
}
ui.with_layout(
egui::Layout::right_to_left(egui::Align::Center),
|ui| {
if ui.button("Copy theme").clicked() {
ctx.copy_text(self.to_rust_snippet());
}
},
);
});
ui.separator();
ui.columns(2, |c| {
let left = &mut c[0];
left.columns(2, |cc| {
changed |=
color_row(&mut cc[0], "Slow wind", &mut self.slow_wind_color);
changed |=
color_row(&mut cc[1], "Fast wind", &mut self.fast_wind_color);
});
left.columns(2, |cc| {
changed |=
color_row(&mut cc[0], "Background 1", &mut self.bg_color1);
changed |=
color_row(&mut cc[1], "Background 2", &mut self.bg_color2);
});
let right = &mut c[1];
changed |= right
.add(
egui::Slider::new(&mut self.wind_speed, 0.0..=0.5)
.text("wind speed"),
)
.changed();
changed |= right
.add(
egui::Slider::new(&mut self.particle_life, 0.5..=30.0)
.text("particle life"),
)
.changed();
changed |= right
.add(
egui::Slider::new(&mut self.particle_opacity, 0.0..=2.0)
.text("line opacity"),
)
.changed();
changed |= right
.add(
egui::Slider::new(&mut self.line_half_width, 0.25..=4.0)
.text("line half-width (px)"),
)
.changed();
changed |= right
.add(
egui::Slider::new(&mut self.alpha_decay, 0.95..=0.9999)
.text("trail decay")
.custom_formatter(|v, _| format!("{v:.4}")),
)
.changed();
changed |= right
.add(
egui::Slider::new(&mut self.particle_count, 256..=8192)
.text("particle count"),
)
.changed();
changed |= right
.add(
egui::Slider::new(&mut self.window_size, 10.0..=180.0)
.text("longitude degrees"),
)
.changed();
});
});
});
changed
}
fn to_rust_snippet(&self) -> String {
let arr = |c: [f32; 4]| format!("[{:.4}, {:.4}, {:.4}, {:.4}]", c[0], c[1], c[2], c[3]);
format!(
"pub const {}: Theme = Theme {{\n \
name: {:?},\n \
slow_wind_color: {},\n \
fast_wind_color: {},\n \
bg_color1: {},\n \
bg_color2: {},\n \
wallpaper_color: rgb8({:#010X}),\n}};",
self.name.to_uppercase().replace([' ', '-'], "_"),
self.name,
arr(self.slow_wind_color),
arr(self.fast_wind_color),
arr(self.bg_color1),
arr(self.bg_color2),
pack_rgba(self.bg_color1) | 0xFF,
)
}
}
fn color_row(ui: &mut egui::Ui, label: &str, color: &mut [f32; 4]) -> bool {
ui.label(egui::RichText::new(label));
crate::color_picker::color_picker_compact(ui, color)
}
fn pack_rgba(c: [f32; 4]) -> u32 {
let b = |x: f32| (x.clamp(0.0, 1.0) * 255.0).round() as u32;
(b(c[0]) << 24) | (b(c[1]) << 16) | (b(c[2]) << 8) | b(c[3])
}