161 lines
4.1 KiB
Rust
161 lines
4.1 KiB
Rust
#[derive(Debug)]
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pub struct CodeExample {
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name: String,
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age: u32,
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}
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impl Default for CodeExample {
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fn default() -> Self {
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Self {
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name: "Arthur".to_owned(),
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age: 42,
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}
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}
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}
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impl CodeExample {
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fn samples_in_grid(&mut self, ui: &mut egui::Ui) {
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show_code(ui, r#"ui.heading("Code samples");"#);
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ui.heading("Code samples");
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ui.end_row();
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show_code(
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ui,
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r#"
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// Putting things on the same line using ui.horizontal:
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ui.horizontal(|ui| {
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ui.label("Your name: ");
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ui.text_edit_singleline(&mut self.name);
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});"#,
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);
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// Putting things on the same line using ui.horizontal:
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ui.horizontal(|ui| {
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ui.label("Your name: ");
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ui.text_edit_singleline(&mut self.name);
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});
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ui.end_row();
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show_code(
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ui,
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r#"egui::Slider::new(&mut self.age, 0..=120).text("age")"#,
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);
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ui.add(egui::Slider::new(&mut self.age, 0..=120).text("age"));
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ui.end_row();
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show_code(
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ui,
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r#"
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if ui.button("Click each year").clicked() {
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self.age += 1;
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}"#,
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);
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if ui.button("Click each year").clicked() {
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self.age += 1;
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}
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ui.end_row();
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show_code(
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ui,
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r#"ui.label(format!("Hello '{}', age {}", self.name, self.age));"#,
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);
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ui.label(format!("Hello '{}', age {}", self.name, self.age));
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ui.end_row();
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}
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}
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impl super::Demo for CodeExample {
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fn name(&self) -> &'static str {
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"🖮 Code Example"
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}
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fn show(&mut self, ctx: &egui::Context, open: &mut bool) {
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use super::View;
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egui::Window::new(self.name())
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.open(open)
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.default_size([800.0, 400.0])
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.vscroll(false)
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.hscroll(true)
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.show(ctx, |ui| self.ui(ui));
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}
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}
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impl super::View for CodeExample {
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fn ui(&mut self, ui: &mut egui::Ui) {
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use crate::syntax_highlighting::code_view_ui;
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ui.vertical_centered(|ui| {
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ui.add(crate::egui_github_link_file!());
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});
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code_view_ui(
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ui,
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r"
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pub struct CodeExample {
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name: String,
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age: u32,
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}
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impl CodeExample {
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fn ui(&mut self, ui: &mut egui::Ui) {
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"
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.trim(),
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);
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ui.horizontal(|ui| {
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let font_id = egui::TextStyle::Monospace.resolve(ui.style());
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let indentation = 8.0 * ui.fonts().glyph_width(&font_id, ' ');
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let item_spacing = ui.spacing_mut().item_spacing;
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ui.add_space(indentation - item_spacing.x);
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egui::Grid::new("code_samples")
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.striped(true)
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.num_columns(2)
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.min_col_width(16.0)
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.spacing([16.0, 8.0])
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.show(ui, |ui| {
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self.samples_in_grid(ui);
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});
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});
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code_view_ui(ui, " }\n}");
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ui.separator();
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code_view_ui(ui, &format!("{:#?}", self));
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ui.separator();
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let mut theme = crate::syntax_highlighting::CodeTheme::from_memory(ui.ctx());
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ui.collapsing("Theme", |ui| {
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theme.ui(ui);
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theme.store_in_memory(ui.ctx());
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});
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}
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}
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fn show_code(ui: &mut egui::Ui, code: &str) {
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let code = remove_leading_indentation(code.trim_start_matches('\n'));
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crate::syntax_highlighting::code_view_ui(ui, &code);
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}
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fn remove_leading_indentation(code: &str) -> String {
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fn is_indent(c: &u8) -> bool {
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matches!(*c, b' ' | b'\t')
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}
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let first_line_indent = code.bytes().take_while(is_indent).count();
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let mut out = String::new();
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let mut code = code;
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while !code.is_empty() {
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let indent = code.bytes().take_while(is_indent).count();
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let start = first_line_indent.min(indent);
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let end = code
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.find('\n')
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.map_or_else(|| code.len(), |endline| endline + 1);
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out += &code[start..end];
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code = &code[end..];
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}
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out
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}
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