Added update_on_type to TextBox to support real-time character-by-character search updates in TreeList

 src/widget/container/treelist.rs |  2 +-
 src/widget/input/text_box.rs     | 13 +++++++++++++
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/src/widget/container/treelist.rs b/src/widget/container/treelist.rs
index a240fd4..c877c75 100644
--- a/src/widget/container/treelist.rs
+++ b/src/widget/container/treelist.rs
@@ -188,7 +188,7 @@ impl TreeList {
         Self {
             base: Widget::new(),
             scroll_box,
-            search_box: TextBox::new(String::new()).with_placeholder("Search..."),
+            search_box: TextBox::new(String::new()).with_placeholder("Search...").with_update_on_type(true),
             flat_keys: Vec::new(),
             annotations: Vec::new(),
             collapsed_sections: HashSet::new(),
diff --git a/src/widget/input/text_box.rs b/src/widget/input/text_box.rs
index 4099d6a..deba499 100644
--- a/src/widget/input/text_box.rs
+++ b/src/widget/input/text_box.rs
@@ -45,6 +45,7 @@ pub struct TextBox {
     pub cursor_x_offset: f32,
     pub glyph_positions: Vec<f32>,
     pub total_text_width: f32,
+    pub update_on_type: bool,
 }
 
 impl TextBox {
@@ -83,9 +84,15 @@ impl TextBox {
             cursor_x_offset: 0.0,
             glyph_positions: Vec::new(),
             total_text_width: 0.0,
+            update_on_type: false,
         }
     }
 
+    pub fn with_update_on_type(mut self, update: bool) -> Self {
+        self.update_on_type = update;
+        self
+    }
+
     pub fn with_multiline(mut self, multiline: bool) -> Self {
         self.multiline = multiline;
         self
@@ -273,6 +280,12 @@ impl TextBox {
     }
 
     pub fn take_change(&mut self) -> bool {
+        if self.update_on_type {
+            if self.text != self.edit_buffer {
+                self.text = self.edit_buffer.clone();
+                self.just_changed = true;
+            }
+        }
         let changed = self.just_changed;
         self.just_changed = false;
         changed