From ccbddcfe951e01c55efd0ed19f2f2ab5edfad5d9 Mon Sep 17 00:00:00 2001
From: Emil Ernerfeldt <emil.ernerfeldt@gmail.com>
Date: Sun, 20 Mar 2022 23:08:19 +0100
Subject: [PATCH] Add example of how to move text cursor in a TextEdit

---
 egui/src/lib.rs                          |  5 +++--
 egui_demo_lib/src/apps/demo/text_edit.rs | 25 ++++++++++++++++++++++++
 2 files changed, 28 insertions(+), 2 deletions(-)

diff --git a/egui/src/lib.rs b/egui/src/lib.rs
index e3a604150d4..c6ab4b0eafc 100644
--- a/egui/src/lib.rs
+++ b/egui/src/lib.rs
@@ -391,9 +391,10 @@ pub use epaint::{
 };
 
 pub mod text {
+    pub use crate::text_edit::CCursorRange;
     pub use epaint::text::{
-        FontData, FontDefinitions, FontFamily, Fonts, Galley, LayoutJob, LayoutSection, TextFormat,
-        TAB_SIZE,
+        cursor::CCursor, FontData, FontDefinitions, FontFamily, Fonts, Galley, LayoutJob,
+        LayoutSection, TextFormat, TAB_SIZE,
     };
 }
 
diff --git a/egui_demo_lib/src/apps/demo/text_edit.rs b/egui_demo_lib/src/apps/demo/text_edit.rs
index b294115b245..e62dd17bcfc 100644
--- a/egui_demo_lib/src/apps/demo/text_edit.rs
+++ b/egui_demo_lib/src/apps/demo/text_edit.rs
@@ -64,6 +64,7 @@ impl super::View for TextEdit {
             anything_selected,
             egui::Label::new("Press ctrl+T to toggle the case of selected text (cmd+T on Mac)"),
         );
+
         if ui
             .input_mut()
             .consume_key(egui::Modifiers::COMMAND, egui::Key::T)
@@ -82,5 +83,29 @@ impl super::View for TextEdit {
                 text.insert_text(&new_text, selected_chars.start);
             }
         }
+
+        ui.horizontal(|ui| {
+            ui.label("Move cursor to the:");
+
+            if ui.button("start").clicked() {
+                let text_edit_id = output.response.id;
+                if let Some(mut state) = egui::TextEdit::load_state(ui.ctx(), text_edit_id) {
+                    let ccursor = egui::text::CCursor::new(0);
+                    state.set_ccursor_range(Some(egui::text::CCursorRange::one(ccursor)));
+                    state.store(ui.ctx(), text_edit_id);
+                    ui.ctx().memory().request_focus(text_edit_id); // give focus back to the `TextEdit`.
+                }
+            }
+
+            if ui.button("end").clicked() {
+                let text_edit_id = output.response.id;
+                if let Some(mut state) = egui::TextEdit::load_state(ui.ctx(), text_edit_id) {
+                    let ccursor = egui::text::CCursor::new(text.chars().count());
+                    state.set_ccursor_range(Some(egui::text::CCursorRange::one(ccursor)));
+                    state.store(ui.ctx(), text_edit_id);
+                    ui.ctx().memory().request_focus(text_edit_id); // give focus back to the `TextEdit`.
+                }
+            }
+        });
     }
 }