103 lines
3.9 KiB
Rust
103 lines
3.9 KiB
Rust
use eframe::egui::{Context, Id, TextEdit, Ui};
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use eframe::{egui, Frame};
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use eframe::egui::text_edit::TextCursorState;
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pub struct App {
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prompt: String,
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output: String,
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evaluated: String,
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cursor: TextCursorState
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}
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impl Default for App {
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fn default() -> Self {
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Self {
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prompt: String::new(),
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output: String::new(),
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evaluated: String::new(),
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cursor: TextCursorState::default()
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}
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}
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}
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impl eframe::App for App {
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fn update(&mut self, ctx: &Context, frame: &mut Frame) {
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ctx.set_pixels_per_point(3.0);
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egui::TopBottomPanel::top("top").show(ctx, |ui| {
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let res = ui.add_sized([ui.available_width(), 20.0], TextEdit::multiline(&mut self.prompt));
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if let Some(state) = TextEdit::load_state(ctx, res.id) {
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self.cursor = state.cursor;
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}
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ui.add_sized([ui.available_width(), 20.0], TextEdit::singleline(&mut self.output));
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});
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egui::CentralPanel::default().show(ctx, |ui| {
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ui.vertical_centered_justified(|ui| {
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ui.horizontal(|ui| {
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self.btn(ui, "1".to_string(), "1".to_string());
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self.btn(ui, "2".to_string(), "2".to_string());
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self.btn(ui, "3".to_string(), "3".to_string());
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});
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ui.horizontal(|ui| {
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self.btn(ui, "4".to_string(), "4".to_string());
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self.btn(ui, "5".to_string(), "5".to_string());
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self.btn(ui, "6".to_string(), "6".to_string());
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});
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ui.horizontal(|ui| {
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self.btn(ui, "7".to_string(), "7".to_string());
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self.btn(ui, "8".to_string(), "8".to_string());
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self.btn(ui, "9".to_string(), "9".to_string());
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});
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ui.horizontal(|ui| {
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self.btn(ui, "0".to_string(), "0".to_string());
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});
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});
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ui.label(" ");
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ui.horizontal(|ui| {
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self.btn(ui, "+".to_string(), "+".to_string());
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self.btn(ui, "-".to_string(), "-".to_string());
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});
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ui.horizontal(|ui| {
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self.btn(ui, "*".to_string(), "*".to_string());
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self.btn(ui, "/".to_string(), "/".to_string());
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});
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ui.horizontal(|ui| {
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self.btn(ui, "(".to_string(), "(".to_string());
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self.btn(ui, ")".to_string(), ")".to_string());
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});
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ui.horizontal(|ui| {
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self.btn(ui, "sin".to_string(), "sin(".to_string());
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self.btn(ui, "cos".to_string(), "cos(".to_string());
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self.btn(ui, "tan".to_string(), "tan(".to_string());
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self.btn(ui, "cot".to_string(), "cot(".to_string());
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});
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ui.horizontal(|ui| {
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self.btn(ui, "log".to_string(), "log(".to_string());
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self.btn(ui, "ln".to_string(), "ln(".to_string());
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});
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ui.horizontal(|ui| {
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self.btn(ui, "sqrt".to_string(), "sqrt(".to_string());
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self.btn(ui, "exp".to_string(), "^".to_string());
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});
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ui.horizontal(|ui| {
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self.btn(ui, "pi".to_string(), "pi".to_string());
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self.btn(ui, "e".to_string(), "e".to_string());
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self.btn(ui, "i".to_string(), "i".to_string());
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});
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});
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// reevaluate if prompt changes
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if self.evaluated != self.prompt {
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self.evaluated = self.prompt.clone();
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self.output = crate::qalculate::eval(self.prompt.clone());
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}
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}
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}
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impl App {
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fn btn(&mut self, ui: &mut Ui, label: String, expr: String) {
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if ui.button(label).clicked() {
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// TODO: insert expr at cursor position in prompt
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self.prompt.push_str(&expr);
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}
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}
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}
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