diff --git a/engine/app_layout.cpp b/engine/app_layout.cpp
index 1f883f9..dd00b68 100644
--- a/engine/app_layout.cpp
+++ b/engine/app_layout.cpp
@@ -134,23 +134,23 @@ void App::init_sidebar()
 //         stroke->m_canvas->draw_stroke();
 //     }
 
-//     brushes->on_brush_changed = [this](Node* target, int index) {
-//         ui::Canvas::I->m_current_brush.m_tex_id = brushes->get_texture_id(index);
-//         ui::Canvas::I->m_current_brush.id = brushes->get_brush_id(index);
-//         stroke->m_canvas->draw_stroke();
-//     };
+    brushes->on_brush_changed = [this](Node* target, int index) {
+        ui::Canvas::I->m_current_brush.m_tex_id = brushes->get_texture_id(index);
+        ui::Canvas::I->m_current_brush.id = brushes->get_brush_id(index);
+        stroke->m_preview->draw_stroke();
+    };
     presets->on_brush_changed = [this](Node* target, int index) {
         auto b = presets->get_brush(index);
         // don't change some params
         b.m_tip_size = ui::Canvas::I->m_current_brush.m_tip_size;
         b.m_tip_color = ui::Canvas::I->m_current_brush.m_tip_color;
         ui::Canvas::I->m_current_brush = b;
+        stroke->m_preview->draw_stroke();
     };
 
-//     color->on_color_changed = [this](Node* target, glm::vec4 color) {
-//         ui::Canvas::I->m_current_brush.m_tip_color = color;
-//         //             stroke->m_canvas->draw_stroke();
-//     };
+    color->on_color_changed = [this](Node* target, glm::vec4 color) {
+        ui::Canvas::I->m_current_brush.m_tip_color = color;
+    };
 // 
 //     stroke->on_stroke_change = [this](Node*target) {
 //         if (canvas)