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Add UI to modify FontTweak live (#5125)

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This will make it easier to get nice sizing and vertical alignments of
fonts
This commit is contained in:
Emil Ernerfeldt
2024-09-18 13:43:33 +02:00
committed by GitHub
parent e31b44f1a5
commit f4ed394a85
7 changed files with 126 additions and 25 deletions
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43
crates/egui_demo_lib/src/demo/font_book.rs
View File

@@ -1,9 +1,16 @@
use std::collections::BTreeMap;
struct GlyphInfo {
name: String,
// What fonts it is available in
fonts: Vec<String>,
}
pub struct FontBook {
filter: String,
font_id: egui::FontId,
named_chars: BTreeMap<egui::FontFamily, BTreeMap<char, String>>,
available_glyphs: BTreeMap<egui::FontFamily, BTreeMap<char, GlyphInfo>>,
}
impl Default for FontBook {
@@ -11,7 +18,7 @@ impl Default for FontBook {
Self {
filter: Default::default(),
font_id: egui::FontId::proportional(18.0),
named_chars: Default::default(),
available_glyphs: Default::default(),
}
}
}
@@ -37,7 +44,7 @@ impl crate::View for FontBook {
ui.label(format!(
"The selected font supports {} characters.",
self.named_chars
self.available_glyphs
.get(&self.font_id.family)
.map(|map| map.len())
.unwrap_or_default()
@@ -67,8 +74,8 @@ impl crate::View for FontBook {
});
let filter = &self.filter;
let named_chars = self
.named_chars
let available_glyphs = self
.available_glyphs
.entry(self.font_id.family.clone())
.or_insert_with(|| available_characters(ui, self.font_id.family.clone()));
@@ -78,8 +85,11 @@ impl crate::View for FontBook {
ui.horizontal_wrapped(|ui| {
ui.spacing_mut().item_spacing = egui::Vec2::splat(2.0);
for (&chr, name) in named_chars {
if filter.is_empty() || name.contains(filter) || *filter == chr.to_string() {
for (&chr, glyph_info) in available_glyphs {
if filter.is_empty()
|| glyph_info.name.contains(filter)
|| *filter == chr.to_string()
{
let button = egui::Button::new(
egui::RichText::new(chr.to_string()).font(self.font_id.clone()),
)
@@ -89,7 +99,10 @@ impl crate::View for FontBook {
ui.label(
egui::RichText::new(chr.to_string()).font(self.font_id.clone()),
);
ui.label(format!("{}\nU+{:X}\n\nClick to copy", name, chr as u32));
ui.label(format!(
"{}\nU+{:X}\n\nFound in: {:?}\n\nClick to copy",
glyph_info.name, chr as u32, glyph_info.fonts
));
};
if ui.add(button).on_hover_ui(tooltip_ui).clicked() {
@@ -102,15 +115,23 @@ impl crate::View for FontBook {
}
}
fn available_characters(ui: &egui::Ui, family: egui::FontFamily) -> BTreeMap<char, String> {
fn available_characters(ui: &egui::Ui, family: egui::FontFamily) -> BTreeMap<char, GlyphInfo> {
ui.fonts(|f| {
f.lock()
.fonts
.font(&egui::FontId::new(10.0, family)) // size is arbitrary for getting the characters
.characters()
.iter()
.filter(|chr| !chr.is_whitespace() && !chr.is_ascii_control())
.map(|&chr| (chr, char_name(chr)))
.filter(|(chr, _fonts)| !chr.is_whitespace() && !chr.is_ascii_control())
.map(|(chr, fonts)| {
(
*chr,
GlyphInfo {
name: char_name(*chr),
fonts: fonts.clone(),
},
)
})
.collect()
})
}