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TextEdit Atom prefix/suffix (#7587)

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* part of https://github.com/emilk/egui/issues/7264
* part of https://github.com/emilk/egui/issues/7445

This PR changes the layout within the TextEdit to be done with
AtomLayout. It also adds a Prefix and Postfix that allows adding
permanent icons / icon buttons within the textedit.

Breaking changes:
- Removed `TextEdit::hint_text_font`. Hint text is an atom now, so the
font can be set that way

<img width="264" height="130" alt="Screenshot 2025-10-06 at 12 25 21"
src="https://github.com/user-attachments/assets/03b6b56b-ca82-4ac3-b5c0-585cca336834"
/>

---------

Co-authored-by: Emil Ernerfeldt <emil.ernerfeldt@gmail.com>
Co-authored-by: lucasmerlin <8009393+lucasmerlin@users.noreply.github.com>
This commit is contained in:
Lucas Meurer
2026-03-20 11:29:32 +01:00
committed by GitHub
parent ad510257de
commit 8b2315375b
31 changed files with 427 additions and 259 deletions
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66
tests/egui_tests/tests/regression_tests.rs
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@@ -1,6 +1,9 @@
use egui::accesskit::Role;
use egui::epaint::Shape;
use egui::{Align, Color32, Image, Label, Layout, RichText, Sense, TextWrapMode, include_image};
use egui::style::ScrollAnimation;
use egui::{
Align, Color32, Image, Label, Layout, RichText, ScrollArea, Sense, TextWrapMode, include_image,
};
use egui_kittest::Harness;
use egui_kittest::kittest::Queryable as _;
@@ -63,6 +66,67 @@ fn text_edit_rtl() {
}
}
#[test]
fn text_edit_delay() {
let mut text = String::new();
let mut harness = Harness::builder().with_size((200.0, 50.0)).build_ui(|ui| {
ui.style_mut().scroll_animation = ScrollAnimation::none();
ui.add(egui::TextEdit::singleline(&mut text).hint_text("Write something"));
});
harness.get_by_role(Role::TextInput).focus();
harness.step();
harness.snapshot("text_edit_delay_0_empty");
harness.get_by_role(Role::TextInput).type_text("h");
// When the text is empty, and we show the hint text, there is a frame delay.
harness.step();
harness.snapshot("text_edit_delay_1_h_invisible");
// Now it should be visible
harness.step();
harness.snapshot("text_edit_delay_2_h_visible");
harness.get_by_role(Role::TextInput).type_text("i");
// The "i" should immediately be visible without a delay
harness.step();
harness.snapshot("text_edit_delay_3_i_visible");
// The next frame should exactly match the previous one
harness.step();
harness.snapshot("text_edit_delay_4_i_visible");
}
#[test]
fn text_edit_scroll() {
let mut text = "1\n2\n3\n4\n".to_owned();
let mut harness = Harness::builder().build_ui(|ui| {
ScrollArea::vertical().max_height(40.0).show(ui, |ui| {
ui.add(
egui::TextEdit::multiline(&mut text)
.desired_rows(2)
.hint_text("Write something"),
);
});
});
harness.fit_contents();
harness.get_by_role(Role::MultilineTextInput).focus();
harness.step();
harness.snapshot("text_edit_scroll_0_focus");
harness
.get_by_role(Role::MultilineTextInput)
.type_text("5\n");
// When the text is empty, and we show the hint text, there is a frame delay.
harness.run();
harness.snapshot("text_edit_scroll_1_5");
}
#[test]
fn combobox_should_have_value() {
let harness = Harness::new_ui(|ui| {