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Add egui_inspection protocol and plugin (#8234)

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Introduces live inspection for running egui apps over a small TCP
request/response protocol, plus the `egui::Plugin` that serves it.

This is the minimal surface to get the egui mcp in, we may want to
extend this in the future to add support for the inspection gui.

---------

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
Lucas Meurer
2026-06-18 11:26:18 +02:00
committed by GitHub
parent 172fb54f7f
commit 86fcffb229
16 changed files with 869 additions and 14 deletions
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3
crates/egui_demo_app/Cargo.toml
View File

@@ -72,6 +72,9 @@ serde = { workspace = true, optional = true }
# native:
[target.'cfg(not(target_arch = "wasm32"))'.dependencies]
# Always enable eframe's `inspection` feature on native so `EGUI_INSPECTION=1 cargo run -p
# egui_demo_app` opens an inspection port for `egui_mcp` (no-op when the env var is unset).
eframe = { workspace = true, features = ["inspection"] }
env_logger = { workspace = true, features = ["auto-color", "humantime"] }
mimalloc.workspace = true
rfd = { workspace = true, optional = true }

8
crates/egui_demo_app/src/accessibility_inspector.rs
View File

@@ -5,8 +5,8 @@ use accesskit_consumer::{FilterResult, Node, NodeId, Tree, TreeChangeHandler};
use eframe::epaint::text::TextWrapMode;
use egui::{
Button, Color32, Event, Frame, FullOutput, Id, Key, KeyboardShortcut, Label, Modifiers, Panel,
RawInput, RichText, ScrollArea, Ui, collapsing_header::CollapsingState,
Button, Color32, Context, Event, Frame, FullOutput, Id, Key, KeyboardShortcut, Label,
Modifiers, Panel, RawInput, RichText, ScrollArea, Ui, collapsing_header::CollapsingState,
};
/// This [`egui::Plugin`] adds an inspector panel.
@@ -46,7 +46,7 @@ impl egui::Plugin for AccessibilityInspectorPlugin {
"Accessibility Inspector"
}
fn input_hook(&mut self, input: &mut RawInput) {
fn input_hook(&mut self, _ctx: &Context, input: &mut RawInput) {
if let Some(queued_action) = self.queued_action.take() {
input
.events
@@ -54,7 +54,7 @@ impl egui::Plugin for AccessibilityInspectorPlugin {
}
}
fn output_hook(&mut self, output: &mut FullOutput) {
fn output_hook(&mut self, _ctx: &Context, output: &mut FullOutput) {
if let Some(update) = output.platform_output.accesskit_update.clone() {
self.tree = match mem::take(&mut self.tree) {
None => {