add preset popup menu

src/node_panel_brush.cpp

@@ -455,6 +455,15 @@ void NodePanelBrushPreset::init()
         }
         save();
     };
+    m_btn_menu = find<NodeButtonCustom>("btn-menu");
+    m_btn_menu->on_click = [this](Node* b) {
+        auto popup = m_manager->instantiate<NodePopupMenu>("tpl-brush-popup");
+        popup->SetPosition(b->m_pos.x + b->m_size.x, b->m_pos.y);
+        root()->add_child(popup);
+        root()->update();
+        auto bounds = root()->GetSize() - zw(popup->get_children_rect());
+        popup->SetPosition(glm::clamp(popup->m_pos, { 0, 0 }, bounds));
+    };
 
     if (Asset::exist(App::I->data_path + "/settings/presets.bin") && !restore())
     {