Focus the Find what field when Find and Replace opens (#1518)

crates/ui-egui/src/dialogs.rs

@@ -1812,7 +1812,12 @@ fn find(app: &mut SheetApp, ui: &mut egui::Ui, d: &mut Dialog) {
     let mut with = d.values.get("with").and_then(Json::as_str).unwrap_or("").to_string();
     ui.horizontal(|ui| {
         ui.label("Find what:");
-        ui.add(egui::TextEdit::singleline(&mut what).desired_width(260.0));
+        let r = ui.add(egui::TextEdit::singleline(&mut what).desired_width(260.0));
+        // Like Excel, the cursor starts in "Find what" - asked for once, so clicking another field still works.
+        if !d.values.contains_key("focused") {
+            r.request_focus();
+            d.values.insert("focused".into(), json!(true));
+        }
     });
     if d.tab == "Replace" {
         ui.horizontal(|ui| {

crates/ui-egui/tests/find_dialog_focus.rs

@@ -0,0 +1,48 @@
+//! Opening Find and Replace puts the cursor in "Find what", so the user can type at once.
+
+use egui::{Event, Key, Modifiers};
+use gridcraft_engine::Session;
+use gridcraft_ui_egui::SheetApp;
+use serde_json::json;
+
+type Harness = egui_kittest::Harness<'static, SheetApp>;
+
+/// Ctrl on Windows and Linux sets both `ctrl` and `command`.
+const CTRL: Modifiers = Modifiers { alt: false, ctrl: true, shift: false, mac_cmd: false, command: true };
+
+fn harness() -> Harness {
+    let mut session = Session::new();
+    session.new_workbook();
+    let mut h = Harness::builder().with_size(egui::vec2(1200.0, 800.0)).build_ui_state(
+        |ui, app: &mut SheetApp| {
+            let ctx = ui.ctx().clone();
+            app.logic(&ctx);
+            app.ui(ui);
+        },
+        SheetApp::new(session, Default::default()),
+    );
+    h.run_steps(6);
+    h
+}
+
+fn type_after_shortcut(k: Key) -> Option<serde_json::Value> {
+    let mut h = harness();
+    h.input_mut().events.push(Event::Key { key: k, physical_key: Some(k), pressed: true, repeat: false, modifiers: CTRL });
+    h.input_mut().events.push(Event::Key { key: k, physical_key: Some(k), pressed: false, repeat: false, modifiers: CTRL });
+    h.run_steps(6);
+    h.input_mut().events.push(Event::Text("abc".into()));
+    h.run_steps(6);
+    let d = h.state().dialog.as_ref().expect("find dialog is open");
+    assert_eq!(d.name, "find");
+    d.values.get("what").cloned()
+}
+
+#[test]
+fn typing_right_after_ctrl_f_fills_find_what() {
+    assert_eq!(type_after_shortcut(Key::F), Some(json!("abc")));
+}
+
+#[test]
+fn typing_right_after_ctrl_h_fills_find_what() {
+    assert_eq!(type_after_shortcut(Key::H), Some(json!("abc")));
+}