Created
July 1, 2023 16:29
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egui todomvc
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use eframe::egui::{self, TextBuffer}; | |
#[derive(Clone)] | |
struct TodoItem { | |
text: String, | |
completed: bool, | |
editing: bool, | |
} | |
fn main() { | |
let mut todos = vec![]; | |
let mut todo_input_text = String::new(); | |
let mut todo_filter: Option<bool> = None; | |
eframe::run_simple_native( | |
"TodoMVC", | |
eframe::NativeOptions::default(), | |
move |ctx: &egui::Context, _frame: &mut eframe::Frame| { | |
egui::CentralPanel::default().show(ctx, |ui| { | |
ui.heading("todos"); | |
todo_list_header(&mut todos, &mut todo_input_text, ui); | |
if !todos.is_empty() { | |
ui.separator(); | |
todo_list_items(&mut todos, &todo_filter, ui); | |
ui.separator(); | |
todo_list_footer(&mut todos, &mut todo_filter, ui); | |
} | |
}); | |
}, | |
) | |
.unwrap(); | |
} | |
fn todo_list_header(todos: &mut Vec<TodoItem>, todo_input_text: &mut String, ui: &mut egui::Ui) { | |
ui.horizontal(|ui| { | |
let everything_completed = todos.iter().all(|todo| todo.completed); | |
let complete_button_text = if everything_completed { | |
"uncomplete all" | |
} else { | |
"complete all" | |
}; | |
if ui.button(complete_button_text).clicked() { | |
for todo in todos.iter_mut() { | |
todo.completed = !everything_completed; | |
} | |
} | |
let input_response = | |
ui.add(egui::TextEdit::singleline(todo_input_text).hint_text("What needs to be done?")); | |
if input_response.lost_focus() && ui.input(|i| i.key_pressed(egui::Key::Enter)) { | |
todos.push(TodoItem { | |
text: todo_input_text.take(), | |
completed: false, | |
editing: false, | |
}); | |
} | |
}); | |
} | |
fn todo_list_items(todos: &mut Vec<TodoItem>, filter: &Option<bool>, ui: &mut egui::Ui) { | |
let mut todo_to_clear = None; | |
for (idx, todo) in todos.iter_mut().enumerate() { | |
if let Some(filter) = filter { | |
if todo.completed != *filter { | |
continue; | |
} | |
} | |
ui.horizontal(|ui| { | |
ui.add(egui::Checkbox::without_text(&mut todo.completed)); | |
if todo.editing { | |
let input_response = ui.add(egui::TextEdit::singleline(&mut todo.text)); | |
if input_response.lost_focus() && ui.input(|i| i.key_pressed(egui::Key::Enter)) { | |
todo.editing = false; | |
} else { | |
input_response.request_focus(); | |
} | |
} else { | |
let mut label_text = egui::RichText::new(&todo.text); | |
if todo.completed { | |
label_text = label_text.strikethrough(); | |
} | |
let label_response = ui.label(label_text); | |
if label_response | |
.interact(egui::Sense::click()) | |
.double_clicked() | |
{ | |
todo.editing = true; | |
} | |
ui.add_space(4.0); | |
if ui.button("x").clicked() { | |
todo_to_clear = Some(idx); | |
} | |
} | |
}); | |
} | |
if let Some(idx) = todo_to_clear.take() { | |
todos.remove(idx); | |
} | |
} | |
fn todo_list_footer(todos: &mut Vec<TodoItem>, filter: &mut Option<bool>, ui: &mut egui::Ui) { | |
ui.horizontal(|ui| { | |
let items_left = todos.iter().filter(|todo| !todo.completed).count(); | |
ui.label(format!("{items_left} items left")); | |
ui.selectable_value(filter, None, "All"); | |
ui.selectable_value(filter, Some(false), "Active"); | |
ui.selectable_value(filter, Some(true), "Completed"); | |
let completed_todos = todos.iter().filter(|todo| todo.completed).count(); | |
if completed_todos > 0 { | |
ui.add_space(8.0); | |
if ui.button("Clear completed").clicked() { | |
let incomplete_todos = todos | |
.iter() | |
.filter(|todo| !todo.completed) | |
.cloned() | |
.collect(); | |
*todos = incomplete_todos; | |
} | |
} | |
}); | |
} |
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