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|
use crate::keymap;
use eframe::egui::{self, Color32, CornerRadius, Stroke, Vec2};
const LEVEL_NAMES: &[&str; 4] = &[
"Level 1 (base)",
"Level 2 (Shift)",
"Level 3 (AltGr)",
"Level 4 (Shift+AltGr)",
];
const KEY_BG: Color32 = Color32::from_rgb(0x33, 0x33, 0x33);
const KEY_BG_MOD_SHIFT: Color32 = Color32::from_rgb(0x2a, 0x5a, 0x2a);
const KEY_BG_MOD_L3: Color32 = Color32::from_rgb(0x4a, 0x2a, 0x5a);
const KEY_BG_MOD_OTHER: Color32 = Color32::from_rgb(0x3a, 0x3a, 0x3a);
const KEY_TEXT: Color32 = Color32::from_rgb(0xcc, 0xcc, 0xcc);
const KEY_TEXT_DIM: Color32 = Color32::from_rgb(0x55, 0x55, 0x55);
const KEY_TEXT_ACTIVE: Color32 = Color32::from_rgb(0xff, 0xff, 0xff);
const KEY_TEXT_MOD: Color32 = Color32::from_rgb(0xff, 0xff, 0xcc);
const KEY_TEXT_DEAD: Color32 = Color32::from_rgb(0xff, 0xaa, 0x44);
const KEY_SPACING: f32 = 4.0;
const KEY_UNIT: f32 = 52.0;
const KEY_HEIGHT: f32 = 48.0;
fn key_bg(kind: &keymap::KeyKind) -> Color32 {
match kind {
keymap::KeyKind::Shift => KEY_BG_MOD_SHIFT,
keymap::KeyKind::Level3 => KEY_BG_MOD_L3,
keymap::KeyKind::Lock | keymap::KeyKind::Control | keymap::KeyKind::Alt | keymap::KeyKind::Super => {
KEY_BG_MOD_OTHER
}
keymap::KeyKind::Normal => KEY_BG,
}
}
fn text_color_for_level(level: usize, active_level: usize, kind: &keymap::KeyKind) -> Color32 {
if level == active_level {
match kind {
keymap::KeyKind::Shift | keymap::KeyKind::Level3 => KEY_TEXT_MOD,
_ => KEY_TEXT_ACTIVE,
}
} else {
KEY_TEXT_DIM
}
}
pub fn render(
ui: &mut egui::Ui,
key_data: &Option<keymap::KeyData>,
selected_level: &mut usize,
active_level: usize,
active_group: usize,
error: &Option<String>,
) {
egui::Panel::top("toolbar").show_inside(ui, |ui| {
ui.horizontal(|ui| {
ui.label(egui::RichText::new("xkbpreview").strong());
if let Some(data) = key_data {
let g = active_group.min(data.layouts.len().saturating_sub(1));
ui.label(format!(" layout: {}", data.layouts[g]));
if data.is_iso {
ui.label(" [ISO]");
} else {
ui.label(" [ANSI]");
}
}
ui.label(format!(" Lv:{}", active_level));
ui.with_layout(egui::Layout::right_to_left(egui::Align::Center), |ui| {
ui.label("Highlight:");
for (i, name) in LEVEL_NAMES.iter().enumerate() {
let mark = if i == active_level { "[x]" } else { "[ ]" };
if ui.selectable_label(*selected_level == i, format!("{} {}", mark, name)).clicked() {
*selected_level = i;
}
}
});
});
});
if let Some(err) = error {
egui::CentralPanel::default().show_inside(ui, |ui| {
ui.colored_label(Color32::RED, format!("Error: {}", err));
ui.label("Make sure you're running under X11 and the XKB configuration is available.");
});
return;
}
let data = match key_data {
Some(d) => d,
None => {
egui::CentralPanel::default().show_inside(ui, |ui| {
ui.label("Loading keyboard layout...");
});
return;
}
};
egui::CentralPanel::default().show_inside(ui, |ui| {
ui.vertical_centered(|ui| {
let rows = group_by_row(&data.keys);
let max_row = rows.iter().map(|(r, _)| *r).max().unwrap_or(0);
let total_w = 15.5 * (KEY_UNIT + KEY_SPACING);
let (rect, _) = ui.allocate_exact_size(
Vec2::new(total_w, (max_row + 1) as f32 * (KEY_HEIGHT + KEY_SPACING)),
egui::Sense::hover(),
);
let painter = ui.painter_at(rect);
let origin = rect.min;
for (row_idx, entries) in &rows {
for entry in entries {
let p = &entry.pos;
let x = p.col * (KEY_UNIT + KEY_SPACING);
let y = *row_idx as f32 * (KEY_HEIGHT + KEY_SPACING);
let w = p.width * KEY_UNIT + (p.width - 1.0) * KEY_SPACING;
let key_rect = egui::Rect::from_min_size(
origin + Vec2::new(x, y),
Vec2::new(w, KEY_HEIGHT),
);
let bg = key_bg(&entry.kind);
painter.rect_filled(key_rect, CornerRadius::same(3), bg);
painter.rect_stroke(key_rect, CornerRadius::same(3), Stroke::new(1.0, Color32::from_rgb(0x55, 0x55, 0x55)), egui::StrokeKind::Middle);
let inset = 3.0;
let cw = key_rect.width() / 2.0;
let centers: [egui::Pos2; 4] = [
key_rect.center(),
egui::Pos2::new(key_rect.left() + cw / 2.0, key_rect.top() + inset + 4.0),
egui::Pos2::new(key_rect.right() - cw / 2.0, key_rect.top() + inset + 4.0),
egui::Pos2::new(key_rect.left() + cw / 2.0, key_rect.bottom() - inset - 4.0),
];
let level_order = [0usize, 1, 2, 3];
let font_sizes = [15.0, 10.0, 10.0, 9.0];
let aligns = [
egui::Align2::CENTER_CENTER,
egui::Align2::LEFT_TOP,
egui::Align2::RIGHT_TOP,
egui::Align2::LEFT_BOTTOM,
];
let g = active_group.min(3);
for &li in &level_order {
let label = &entry.labels[g][li];
if label.is_empty() {
continue;
}
let color = if entry.dead[g][li] {
KEY_TEXT_DEAD
} else if li == 0 {
if 0 == active_level {
text_color_for_level(li, active_level, &entry.kind)
} else {
KEY_TEXT
}
} else {
text_color_for_level(li, active_level, &entry.kind)
};
let font = if label.len() > 2 {
egui::FontId::proportional(font_sizes[li] - 1.0)
} else {
egui::FontId::proportional(font_sizes[li])
};
painter.text(centers[li], aligns[li], label, font, color);
}
}
}
let legend_y = (max_row + 1) as f32 * (KEY_HEIGHT + KEY_SPACING) + 16.0;
let legend_items = [
(KEY_BG_MOD_SHIFT, "Shift (triggers L2)"),
(KEY_BG_MOD_L3, "AltGr (triggers L3)"),
(KEY_BG_MOD_OTHER, "Other modifiers"),
(KEY_TEXT_DEAD, "Dead key accent"),
];
for (i, (color, text)) in legend_items.iter().enumerate() {
let ly = legend_y + i as f32 * 20.0;
let r = egui::Rect::from_min_size(
origin + Vec2::new(0.0, ly),
Vec2::new(14.0, 14.0),
);
painter.rect_filled(r, CornerRadius::same(2), *color);
painter.text(
egui::Pos2::new(r.right() + 6.0, r.center().y),
egui::Align2::LEFT_CENTER,
*text,
egui::FontId::proportional(12.0),
KEY_TEXT,
);
}
});
});
}
fn group_by_row<'a>(keys: &'a [keymap::KeyEntry]) -> Vec<(usize, Vec<&'a keymap::KeyEntry>)> {
let mut rows: Vec<(usize, Vec<&'a keymap::KeyEntry>)> = Vec::new();
for key in keys {
let row = key.pos.row;
if row > 4 {
continue;
}
if let Some(entry) = rows.iter_mut().find(|(r, _)| *r == row) {
entry.1.push(key);
} else {
rows.push((row, vec![key]));
}
}
rows.sort_by_key(|(r, _)| *r);
for (_, entries) in &mut rows {
entries.sort_by(|a, b| a.pos.col.partial_cmp(&b.pos.col).unwrap());
}
rows
}
|
