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W16 custom backgrounds: core + render layer (Settings UI pending)

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Pure src/background.rs (process_background downscale→PNG, scrim_color; 5 tests),
AppConfig.background/background_dim + background_path(), cached AppState.background_image,
PickBackgroundFile/BackgroundFilePicked/RemoveBackground/SetBackgroundDim handlers,
view_with_background stack(image Cover→scrim→ui) + transparent screen roots.
Lib builds clean. Remaining: Settings UI controls + full build/clippy/test pass.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
mollusk
2026-06-20 17:29:09 -04:00
co-authored by Claude Opus 4.8
parent a30d9d5dbf
commit 70a0e6798f
4 changed files with 273 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/app/mod.rs
+138 -3
View File
@@ -290,6 +290,15 @@ pub enum AppMessage {
/// Result of the avatar file picker: the chosen file's raw bytes, or `None`
/// if the user cancelled.
AvatarFilePicked(Option<Vec<u8>>),
/// Open the native file picker to choose a custom UI background image (W16).
PickBackgroundFile,
/// Result of the background file picker: the chosen file's raw bytes, or
/// `None` if the user cancelled.
BackgroundFilePicked(Option<Vec<u8>>),
/// Clear the custom background, reverting to the theme background (W16).
RemoveBackground,
/// Set the background legibility scrim strength (0.0..=1.0) (W16).
SetBackgroundDim(f32),
/// Toggle the Chat drawer open/closed (drawer layout).
ToggleDrawerChat,
/// Start/stop sharing our own screen (spawns/kills a pixelpass host).
@@ -335,6 +344,10 @@ pub struct AppState {
selected_input: Option<AudioDevice>,
selected_output: Option<AudioDevice>,
config: AppConfig,
/// Decoded bytes of the custom background image (W16), cached so `view()`
/// doesn't read the file from disk on every redraw. Loaded on startup and
/// refreshed when the background is changed/removed. `None` = no custom bg.
background_image: Option<bytes::Bytes>,
peers: HashMap<EndpointId, PeerState>,
peer_volumes: HashMap<EndpointId, f32>,
audio_levels: HashMap<EndpointId, f32>,
@@ -470,6 +483,7 @@ impl Default for AppState {
let selected_input = input_devices.iter().find(|d| d.name == config.input_device).cloned();
let selected_output = output_devices.iter().find(|d| d.name == config.output_device).cloned();
let background_image = load_background_bytes(&config);
Self {
// Pre-fill the nickname with the last one used (or "Peer" by default).
@@ -489,6 +503,7 @@ impl Default for AppState {
selected_input,
selected_output,
config,
background_image,
peers: HashMap::new(),
peer_volumes: HashMap::new(),
audio_levels: HashMap::new(),
@@ -533,6 +548,15 @@ fn theme(state: &AppState) -> Theme {
state.config.theme.base_theme()
}
/// Read the custom background PNG (W16) from disk into memory, if one is set and
/// readable. Called once on startup and whenever the background changes, so the
/// per-frame `view()` never touches the filesystem. A missing/unreadable file
/// silently yields `None` (the UI falls back to the theme background).
fn load_background_bytes(config: &AppConfig) -> Option<bytes::Bytes> {
let path = config.background.as_deref()?;
std::fs::read(path).ok().map(bytes::Bytes::from)
}
pub fn run_gui() -> iced::Result {
// Restore the last window size (saved on close). Position is restored too,
// but only on X11 — Wayland's xdg-shell gives clients no way to set their own
@@ -540,7 +564,7 @@ pub fn run_gui() -> iced::Result {
let saved = AppConfig::load();
let init_size = iced::Size::new(saved.window_width, saved.window_height);
let init_position = initial_window_position(saved.window_x, saved.window_y, is_wayland());
iced::application(AppState::default, update, view)
iced::application(AppState::default, update, view_with_background)
.title("PeerSpeak P2P Voice Chat")
.theme(theme)
.subscription(subscription)
@@ -1347,6 +1371,73 @@ fn update(state: &mut AppState, message: AppMessage) -> Task<AppMessage> {
}
}
}
AppMessage::PickBackgroundFile => {
// Native picker off the UI thread; result returns as BackgroundFilePicked.
return Task::perform(
async {
let handle = rfd::AsyncFileDialog::new()
.add_filter("Images", &["png", "jpg", "jpeg", "webp", "bmp"])
.set_title("Choose a background image")
.pick_file()
.await;
match handle {
Some(h) => Some(h.read().await),
None => None,
}
},
AppMessage::BackgroundFilePicked,
);
}
AppMessage::BackgroundFilePicked(picked) => {
if let Some(bytes) = picked {
match crate::background::process_background(&bytes) {
Ok(png) => match AppConfig::background_path() {
Some(path) => {
if let Some(dir) = path.parent() {
let _ = std::fs::create_dir_all(dir);
}
match std::fs::write(&path, &png) {
Ok(()) => {
state.config.background =
Some(path.to_string_lossy().into_owned());
state.config.save();
// Refresh the in-memory cache from the bytes we
// just wrote (avoids re-reading from disk).
state.background_image = Some(bytes::Bytes::from(png));
state.status_message = "Background updated.".to_string();
}
Err(e) => {
state.status_message =
format!("Couldn't save background: {e}");
}
}
}
None => {
state.status_message =
"Couldn't find a config directory to save the background."
.to_string();
}
},
Err(e) => {
state.status_message = e;
}
}
}
}
AppMessage::RemoveBackground => {
// Best-effort delete of our stored copy; clear the config + cache.
if let Some(path) = AppConfig::background_path() {
let _ = std::fs::remove_file(path);
}
state.config.background = None;
state.config.save();
state.background_image = None;
state.status_message = "Background removed.".to_string();
}
AppMessage::SetBackgroundDim(dim) => {
state.config.background_dim = dim.clamp(0.0, 1.0);
state.config.save();
}
AppMessage::ToggleDrawerChat => {
state.drawer_chat_open = !state.drawer_chat_open;
}
@@ -2018,6 +2109,40 @@ fn friends_panel(state: &AppState) -> Element<'_, AppMessage> {
.into()
}
/// Wrap the main [`view`] with the custom background layer (W16). When a
/// background image is set, render `stack![ image(Cover), scrim, ui ]` so the
/// photo sits behind the whole UI with a legibility scrim (the theme base colour
/// at `background_dim` alpha) between them; otherwise return the UI untouched. The
/// three screen roots go transparent (`root_bg` in `view`) so the image shows
/// through the gaps between panels. This is the registered top-level view.
fn view_with_background(state: &AppState) -> Element<'_, AppMessage> {
let content = view(state);
let Some(bytes) = state.background_image.clone() else {
return content;
};
let pal = state.config.theme.palette();
let dim = state.config.background_dim;
let image_layer = iced::widget::image(cached_image_handle(bytes))
.content_fit(iced::ContentFit::Cover)
.width(iced::Length::Fill)
.height(iced::Length::Fill);
let scrim = container(
iced::widget::Space::new()
.width(iced::Length::Fill)
.height(iced::Length::Fill),
)
.width(iced::Length::Fill)
.height(iced::Length::Fill)
.style(move |_: &Theme| container::Style {
background: Some(Background::Color(crate::background::scrim_color(pal.base, dim))),
..Default::default()
});
iced::widget::stack![image_layer, scrim, content]
.width(iced::Length::Fill)
.height(iced::Length::Fill)
.into()
}
fn view(state: &AppState) -> Element<'_, AppMessage> {
// Theme colours — sourced from the active palette (see `src/theme.rs`), so
// all styling below re-themes when the user picks a different theme.
@@ -2036,6 +2161,16 @@ fn view(state: &AppState) -> Element<'_, AppMessage> {
let color_green = pal.green;
let color_yellow = pal.yellow;
// The window backdrop fill for the three screen roots. When a custom
// background image is set (W16), the root goes transparent so the image +
// scrim layered behind by `view_with_background` shows through the gaps
// between panels; otherwise it's the usual opaque `crust`.
let root_bg = if state.background_image.is_some() {
Color::TRANSPARENT
} else {
color_crust
};
// Style Helpers
let c_style = move |bg: Color, b_color: Color, radius: f32| {
move |_theme: &Theme| container::Style {
@@ -2830,7 +2965,7 @@ fn view(state: &AppState) -> Element<'_, AppMessage> {
.height(iced::Length::Fill)
.padding(24)
.center_x(iced::Length::Fill)
.style(c_style(color_crust, Color::TRANSPARENT, 0.0));
.style(c_style(root_bg, Color::TRANSPARENT, 0.0));
return with_regenerate_confirm(settings_screen.into(), state);
}
@@ -2889,7 +3024,7 @@ fn view(state: &AppState) -> Element<'_, AppMessage> {
)
.width(iced::Length::Fill)
.height(iced::Length::Fill)
.style(c_style(color_crust, Color::TRANSPARENT, 0.0));
.style(c_style(root_bg, Color::TRANSPARENT, 0.0));
with_hotkey_info(with_layout_picker(home.into(), state), state)
} else {