init

src/app.rs

@@ -0,0 +1,43 @@
+use eframe::egui::{Context, TextEdit, Ui};
+use eframe::{egui, Frame};
+use eframe::egui::WidgetType::TextEdit;
+
+pub struct App {
+    prompt: String,
+    output: String,
+    evaluated: String,
+}
+
+impl Default for App {
+    fn default() -> Self {
+        Self {
+            prompt: String::new(),
+            output: String::new(),
+            evaluated: String::new(),
+        }
+    }
+}
+
+impl eframe::App for App {
+    fn update(&mut self, ctx: &Context, frame: &mut Frame) {
+        egui::TopBottomPanel::top("top").show(ctx, |ui| {
+            // TODO:  get cursor position from multiline
+            TextEdit::multiline(&mut self.prompt).show(ui);
+            TextEdit::singleline(&mut self.output).show(ui);
+        });
+        egui::CentralPanel::default().show(ctx, |ui| {
+
+        });
+        // reevaluate if prompt changes
+        if self.evaluated != self.prompt {
+            self.evaluated = self.prompt.clone();
+            self.output = crate::qalculate::eval(self.prompt.clone());
+        }
+    }
+
+    fn btn(&mut self, ui: &mut Ui, label: String, expr: String) {
+        if ui.button(label).clicked() {
+            // TODO: insert expr at cursor position in prompt
+        }
+    }
+}