diff --git a/CMakeLists.txt b/CMakeLists.txt
index e980582..75f65c1 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -68,7 +68,7 @@ find_package(OpenColorIO)
 find_package(OpenImageIO)
 find_package(OpenFX)
 find_package(OpenTimelineIO)
-find_package(feather-tk)
+find_package(ftk)
 
 include_directories(lib)
 include_directories(tests)
diff --git a/bin/toucan-filmstrip/App.cpp b/bin/toucan-filmstrip/App.cpp
index 1b9b37e..fb19d48 100644
--- a/bin/toucan-filmstrip/App.cpp
+++ b/bin/toucan-filmstrip/App.cpp
@@ -5,7 +5,7 @@
 
 #include <toucanRender/Util.h>
 
-#include <feather-tk/core/Time.h>
+#include <ftk/Core/Time.h>
 
 #include <OpenImageIO/imagebufalgo.h>
 
diff --git a/bin/toucan-filmstrip/App.h b/bin/toucan-filmstrip/App.h
index 5120d04..f3fac70 100644
--- a/bin/toucan-filmstrip/App.h
+++ b/bin/toucan-filmstrip/App.h
@@ -7,8 +7,8 @@
 #include <toucanRender/ImageGraph.h>
 #include <toucanRender/TimelineWrapper.h>
 
-#include <feather-tk/core/IApp.h>
-#include <feather-tk/core/CmdLine.h>
+#include <ftk/Core/IApp.h>
+#include <ftk/Core/CmdLine.h>
 
 #include <OpenImageIO/imagebuf.h>
 
diff --git a/bin/toucan-filmstrip/main.cpp b/bin/toucan-filmstrip/main.cpp
index ef38161..91c82c8 100644
--- a/bin/toucan-filmstrip/main.cpp
+++ b/bin/toucan-filmstrip/main.cpp
@@ -3,7 +3,7 @@
 
 #include "App.h"
 
-#include <feather-tk/core/Context.h>
+#include <ftk/Core/Context.h>
 
 #include <iostream>
 
diff --git a/bin/toucan-render/App.cpp b/bin/toucan-render/App.cpp
index dc7ff2f..83f658e 100644
--- a/bin/toucan-render/App.cpp
+++ b/bin/toucan-render/App.cpp
@@ -7,7 +7,7 @@
 #include <toucanRender/Read.h>
 #include <toucanRender/Util.h>
 
-#include <feather-tk/core/Time.h>
+#include <ftk/Core/Time.h>
 
 #include <OpenImageIO/imagebufalgo.h>
 
diff --git a/bin/toucan-render/App.h b/bin/toucan-render/App.h
index 8a1dc2d..c73a206 100644
--- a/bin/toucan-render/App.h
+++ b/bin/toucan-render/App.h
@@ -7,8 +7,8 @@
 #include <toucanRender/ImageGraph.h>
 #include <toucanRender/TimelineWrapper.h>
 
-#include <feather-tk/core/CmdLine.h>
-#include <feather-tk/core/IApp.h>
+#include <ftk/Core/CmdLine.h>
+#include <ftk/Core/IApp.h>
 
 #include <OpenImageIO/imagebuf.h>
 
diff --git a/bin/toucan-render/main.cpp b/bin/toucan-render/main.cpp
index 2e653a8..9d07b0c 100644
--- a/bin/toucan-render/main.cpp
+++ b/bin/toucan-render/main.cpp
@@ -3,7 +3,7 @@
 
 #include "App.h"
 
-#include <feather-tk/core/Context.h>
+#include <ftk/Core/Context.h>
 
 #include <iostream>
 
diff --git a/bin/toucan-view/main.cpp b/bin/toucan-view/main.cpp
index d74c1e7..f891482 100644
--- a/bin/toucan-view/main.cpp
+++ b/bin/toucan-view/main.cpp
@@ -3,7 +3,7 @@
 
 #include "toucanView/App.h"
 
-#include <feather-tk/core/Context.h>
+#include <ftk/Core/Context.h>
 
 #include <iostream>
 
diff --git a/cmake/SuperBuild/Buildfeather-tk.cmake b/cmake/SuperBuild/Buildftk.cmake
similarity index 87%
rename from cmake/SuperBuild/Buildfeather-tk.cmake
rename to cmake/SuperBuild/Buildftk.cmake
index 159358e..e814ec9 100644
--- a/cmake/SuperBuild/Buildfeather-tk.cmake
+++ b/cmake/SuperBuild/Buildftk.cmake
@@ -1,7 +1,7 @@
 include(ExternalProject)
 
-set(ftk_GIT_REPOSITORY "https://github.com/darbyjohnston/feather-tk.git")
-set(ftk_GIT_TAG "038196681ad5825c431f7da22ff4d873c82b3acd")
+set(ftk_GIT_REPOSITORY "https://github.com/grizzlypeak3d/feather-tk.git")
+set(ftk_GIT_TAG "2de0861f19326dab562b189e2988a49304475dc3")
 
 set(ftk_DEPS ZLIB nlohmann_json PNG Freetype lunasvg)
 
diff --git a/cmake/SuperBuild/CMakeLists.txt b/cmake/SuperBuild/CMakeLists.txt
index 8320c03..9c1bcaf 100644
--- a/cmake/SuperBuild/CMakeLists.txt
+++ b/cmake/SuperBuild/CMakeLists.txt
@@ -25,7 +25,7 @@ set(toucan_OpenColorIO ON CACHE BOOL "Build OpenColorIO")
 set(toucan_OpenImageIO ON CACHE BOOL "Build OpenImageIO")
 set(toucan_OpenTimelineIO ON CACHE BOOL "Build OpenTimelineIO")
 set(toucan_OpenFX ON CACHE BOOL "Build OpenFX")
-set(toucan_feather-tk ON CACHE BOOL "Build feather-tk")
+set(toucan_ftk ON CACHE BOOL "Build feather-tk")
 
 list(PREPEND CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR})
 
@@ -119,6 +119,6 @@ endif()
 if(toucan_OpenFX)
     include(BuildOpenFX)
 endif()
-if(toucan_feather-tk)
-    include(Buildfeather-tk)
+if(toucan_ftk)
+    include(Buildftk)
 endif()
diff --git a/lib/toucanRender/CMakeLists.txt b/lib/toucanRender/CMakeLists.txt
index b2199c0..02aa75c 100644
--- a/lib/toucanRender/CMakeLists.txt
+++ b/lib/toucanRender/CMakeLists.txt
@@ -46,7 +46,7 @@ endif()
 add_library(toucanRender ${HEADERS} ${HEADERS_PRIVATE} ${SOURCE})
 set(LIBS_PUBLIC
     toucanResource
-    ftk::feather-tk-core
+    ftk::ftkCore
     OTIO::opentimelineio
     OTIO::opentime
     lunasvg::lunasvg
diff --git a/lib/toucanRender/FFmpegRead.cpp b/lib/toucanRender/FFmpegRead.cpp
index 32e1034..a945fa1 100644
--- a/lib/toucanRender/FFmpegRead.cpp
+++ b/lib/toucanRender/FFmpegRead.cpp
@@ -3,7 +3,7 @@
 
 #include "FFmpegRead.h"
 
-#include <feather-tk/core/String.h>
+#include <ftk/Core/String.h>
 
 #include <iostream>
 #include <sstream>
diff --git a/lib/toucanRender/FFmpegWrite.cpp b/lib/toucanRender/FFmpegWrite.cpp
index 7976c27..b1942b4 100644
--- a/lib/toucanRender/FFmpegWrite.cpp
+++ b/lib/toucanRender/FFmpegWrite.cpp
@@ -5,7 +5,7 @@
 
 #include <OpenImageIO/imagebufalgo.h>
 
-#include <feather-tk/core/Time.h>
+#include <ftk/Core/Time.h>
 
 #include <iostream>
 #include <sstream>
diff --git a/lib/toucanRender/ImageEffectHost.cpp b/lib/toucanRender/ImageEffectHost.cpp
index bf322ef..62ae66c 100644
--- a/lib/toucanRender/ImageEffectHost.cpp
+++ b/lib/toucanRender/ImageEffectHost.cpp
@@ -5,7 +5,7 @@
 
 #include "ImageEffect.h"
 
-#include <feather-tk/core/LogSystem.h>
+#include <ftk/Core/LogSystem.h>
 
 #include <cstdarg>
 #include <cstring>
diff --git a/lib/toucanRender/ImageEffectHost.h b/lib/toucanRender/ImageEffectHost.h
index c459197..554a077 100644
--- a/lib/toucanRender/ImageEffectHost.h
+++ b/lib/toucanRender/ImageEffectHost.h
@@ -5,7 +5,7 @@
 
 #include <toucanRender/ImageEffect.h>
 
-#include <feather-tk/core/Context.h>
+#include <ftk/Core/Context.h>
 
 #include <OpenImageIO/imagebuf.h>
 
diff --git a/lib/toucanRender/ImageGraph.cpp b/lib/toucanRender/ImageGraph.cpp
index d6c1545..ee074a0 100644
--- a/lib/toucanRender/ImageGraph.cpp
+++ b/lib/toucanRender/ImageGraph.cpp
@@ -10,7 +10,7 @@
 #include "TimelineAlgo.h"
 #include "Util.h"
 
-#include <feather-tk/core/LogSystem.h>
+#include <ftk/Core/LogSystem.h>
 
 #include <opentimelineio/clip.h>
 #include <opentimelineio/externalReference.h>
diff --git a/lib/toucanRender/ImageGraph.h b/lib/toucanRender/ImageGraph.h
index 246732d..7bd4672 100644
--- a/lib/toucanRender/ImageGraph.h
+++ b/lib/toucanRender/ImageGraph.h
@@ -6,8 +6,8 @@
 #include <toucanRender/ImageNode.h>
 #include <toucanRender/TimelineWrapper.h>
 
-#include <feather-tk/core/Context.h>
-#include <feather-tk/core/LRUCache.h>
+#include <ftk/Core/Context.h>
+#include <ftk/Core/LRUCache.h>
 
 #include <opentimelineio/track.h>
 #include <opentimelineio/transition.h>
diff --git a/lib/toucanRender/TimelineWrapper.cpp b/lib/toucanRender/TimelineWrapper.cpp
index 5ed2c5d..18ba432 100644
--- a/lib/toucanRender/TimelineWrapper.cpp
+++ b/lib/toucanRender/TimelineWrapper.cpp
@@ -7,7 +7,7 @@
 
 #include <toucanRender/Read.h>
 
-#include <feather-tk/core/String.h>
+#include <ftk/Core/String.h>
 
 #include <opentimelineio/clip.h>
 #include <opentimelineio/externalReference.h>
diff --git a/lib/toucanResource/CMakeLists.txt b/lib/toucanResource/CMakeLists.txt
index 926e01a..c4fdcbe 100644
--- a/lib/toucanResource/CMakeLists.txt
+++ b/lib/toucanResource/CMakeLists.txt
@@ -6,7 +6,7 @@ foreach(RESOURCE ${RESOURCES})
     get_filename_component(RESOURCE_BASE ${RESOURCE} NAME_WE)
     add_custom_command(
         OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${RESOURCE_BASE}.cpp
-        COMMAND $<TARGET_FILE:ftk::feather-tk-resource> ${CMAKE_SOURCE_DIR}/${RESOURCE} ${RESOURCE_BASE} toucan_resource
+        COMMAND $<TARGET_FILE:ftk::ftk-resource> ${CMAKE_SOURCE_DIR}/${RESOURCE} ${RESOURCE_BASE} toucan_resource
         DEPENDS ${CMAKE_SOURCE_DIR}/${RESOURCE})
     list(APPEND SOURCE ${CMAKE_CURRENT_BINARY_DIR}/${RESOURCE_BASE}.cpp)
 endforeach()
diff --git a/lib/toucanView/App.cpp b/lib/toucanView/App.cpp
index 9bbe3cb..bec4e12 100644
--- a/lib/toucanView/App.cpp
+++ b/lib/toucanView/App.cpp
@@ -11,12 +11,12 @@
 
 #include <toucanRender/Util.h>
 
-#include <feather-tk/ui/DialogSystem.h>
-#include <feather-tk/ui/FileBrowser.h>
-#include <feather-tk/ui/MessageDialog.h>
-#include <feather-tk/ui/Settings.h>
+#include <ftk/UI/DialogSystem.h>
+#include <ftk/UI/FileBrowser.h>
+#include <ftk/UI/MessageDialog.h>
+#include <ftk/UI/Settings.h>
 
-#include <feather-tk/core/CmdLine.h>
+#include <ftk/Core/CmdLine.h>
 
 #include <nlohmann/json.hpp>
 
diff --git a/lib/toucanView/App.h b/lib/toucanView/App.h
index 79f2812..ba7406a 100644
--- a/lib/toucanView/App.h
+++ b/lib/toucanView/App.h
@@ -3,8 +3,8 @@
 
 #pragma once
 
-#include <feather-tk/ui/App.h>
-#include <feather-tk/ui/Settings.h>
+#include <ftk/UI/App.h>
+#include <ftk/UI/Settings.h>
 
 #include <filesystem>
 
diff --git a/lib/toucanView/AudioClipItem.cpp b/lib/toucanView/AudioClipItem.cpp
index 5138422..5402dce 100644
--- a/lib/toucanView/AudioClipItem.cpp
+++ b/lib/toucanView/AudioClipItem.cpp
@@ -8,7 +8,7 @@
 
 #include <toucanRender/Util.h>
 
-#include <feather-tk/ui/DrawUtil.h>
+#include <ftk/UI/DrawUtil.h>
 
 #include <opentimelineio/externalReference.h>
 
diff --git a/lib/toucanView/AudioClipItem.h b/lib/toucanView/AudioClipItem.h
index 762b972..9ebfc85 100644
--- a/lib/toucanView/AudioClipItem.h
+++ b/lib/toucanView/AudioClipItem.h
@@ -7,7 +7,7 @@
 #include <toucanView/ItemLabel.h>
 #include <toucanView/MarkerItem.h>
 
-#include <feather-tk/ui/RowLayout.h>
+#include <ftk/UI/RowLayout.h>
 
 #include <opentimelineio/clip.h>
 
diff --git a/lib/toucanView/BackgroundTool.cpp b/lib/toucanView/BackgroundTool.cpp
index d31f3a0..4539335 100644
--- a/lib/toucanView/BackgroundTool.cpp
+++ b/lib/toucanView/BackgroundTool.cpp
@@ -5,10 +5,10 @@
 
 #include "App.h"
 
-#include <feather-tk/ui/Divider.h>
-#include <feather-tk/ui/Label.h>
-#include <feather-tk/ui/Spacer.h>
-#include <feather-tk/core/String.h>
+#include <ftk/UI/Divider.h>
+#include <ftk/UI/Label.h>
+#include <ftk/UI/Spacer.h>
+#include <ftk/Core/String.h>
 
 namespace toucan
 {
diff --git a/lib/toucanView/BackgroundTool.h b/lib/toucanView/BackgroundTool.h
index 5a6db37..c93c31f 100644
--- a/lib/toucanView/BackgroundTool.h
+++ b/lib/toucanView/BackgroundTool.h
@@ -7,11 +7,11 @@
 #include <toucanView/ViewModel.h>
 #include <toucanView/IToolWidget.h>
 
-#include <feather-tk/ui/ColorWidget.h>
-#include <feather-tk/ui/ComboBox.h>
-#include <feather-tk/ui/IntEditSlider.h>
-#include <feather-tk/ui/RowLayout.h>
-#include <feather-tk/ui/ScrollWidget.h>
+#include <ftk/UI/ColorWidget.h>
+#include <ftk/UI/ComboBox.h>
+#include <ftk/UI/IntEditSlider.h>
+#include <ftk/UI/RowLayout.h>
+#include <ftk/UI/ScrollWidget.h>
 
 namespace toucan
 {
diff --git a/lib/toucanView/CMakeLists.txt b/lib/toucanView/CMakeLists.txt
index 189ea37..1e8bad8 100644
--- a/lib/toucanView/CMakeLists.txt
+++ b/lib/toucanView/CMakeLists.txt
@@ -99,6 +99,6 @@ set(SOURCE
     WindowToolBar.cpp)
 
 add_library(toucanView ${HEADERS} ${SOURCE})
-target_link_libraries(toucanView PUBLIC toucanRender ftk::feather-tk-ui)
+target_link_libraries(toucanView PUBLIC toucanRender ftk::ftkUI)
 set_target_properties(toucanView PROPERTIES FOLDER lib)
 add_dependencies(toucanView ${TOUCAN_PLUGINS})
diff --git a/lib/toucanView/CompareMenu.cpp b/lib/toucanView/CompareMenu.cpp
index a6728a3..ae5c9d3 100644
--- a/lib/toucanView/CompareMenu.cpp
+++ b/lib/toucanView/CompareMenu.cpp
@@ -5,7 +5,7 @@
 
 #include "App.h"
 
-#include <feather-tk/ui/Action.h>
+#include <ftk/UI/Action.h>
 
 namespace toucan
 {
diff --git a/lib/toucanView/CompareMenu.h b/lib/toucanView/CompareMenu.h
index c86b9db..9eb5d2c 100644
--- a/lib/toucanView/CompareMenu.h
+++ b/lib/toucanView/CompareMenu.h
@@ -5,7 +5,7 @@
 
 #include <toucanView/FilesModel.h>
 
-#include <feather-tk/ui/Menu.h>
+#include <ftk/UI/Menu.h>
 
 #include <map>
 
diff --git a/lib/toucanView/CompareTool.cpp b/lib/toucanView/CompareTool.cpp
index 5c18745..c1e26a7 100644
--- a/lib/toucanView/CompareTool.cpp
+++ b/lib/toucanView/CompareTool.cpp
@@ -6,10 +6,10 @@
 #include "App.h"
 #include "SelectionModel.h"
 
-#include <feather-tk/ui/Divider.h>
-#include <feather-tk/ui/Label.h>
-#include <feather-tk/ui/Spacer.h>
-#include <feather-tk/core/String.h>
+#include <ftk/UI/Divider.h>
+#include <ftk/UI/Label.h>
+#include <ftk/UI/Spacer.h>
+#include <ftk/Core/String.h>
 
 namespace toucan
 {
diff --git a/lib/toucanView/CompareTool.h b/lib/toucanView/CompareTool.h
index eee5528..b5c9185 100644
--- a/lib/toucanView/CompareTool.h
+++ b/lib/toucanView/CompareTool.h
@@ -6,13 +6,13 @@
 #include <toucanView/FilesModel.h>
 #include <toucanView/IToolWidget.h>
 
-#include <feather-tk/ui/CheckBox.h>
-#include <feather-tk/ui/ComboBox.h>
-#include <feather-tk/ui/GridLayout.h>
-#include <feather-tk/ui/RowLayout.h>
-#include <feather-tk/ui/ScrollWidget.h>
-#include <feather-tk/ui/ToolButton.h>
-#include <feather-tk/core/ObservableList.h>
+#include <ftk/UI/CheckBox.h>
+#include <ftk/UI/ComboBox.h>
+#include <ftk/UI/GridLayout.h>
+#include <ftk/UI/RowLayout.h>
+#include <ftk/UI/ScrollWidget.h>
+#include <ftk/UI/ToolButton.h>
+#include <ftk/Core/ObservableList.h>
 
 namespace toucan
 {
diff --git a/lib/toucanView/DetailsTool.cpp b/lib/toucanView/DetailsTool.cpp
index 4b08896..71737ca 100644
--- a/lib/toucanView/DetailsTool.cpp
+++ b/lib/toucanView/DetailsTool.cpp
@@ -7,10 +7,10 @@
 #include "FilesModel.h"
 #include "PlaybackModel.h"
 
-#include <feather-tk/ui/Divider.h>
-#include <feather-tk/ui/Spacer.h>
-#include <feather-tk/core/Format.h>
-#include <feather-tk/core/String.h>
+#include <ftk/UI/Divider.h>
+#include <ftk/UI/Spacer.h>
+#include <ftk/Core/Format.h>
+#include <ftk/Core/String.h>
 
 #include <opentimelineio/marker.h>
 
diff --git a/lib/toucanView/DetailsTool.h b/lib/toucanView/DetailsTool.h
index a5fc5c0..c52bc7a 100644
--- a/lib/toucanView/DetailsTool.h
+++ b/lib/toucanView/DetailsTool.h
@@ -9,16 +9,16 @@
 
 #include <toucanRender/ImageGraph.h>
 
-#include <feather-tk/ui/Bellows.h>
-#include <feather-tk/ui/ButtonGroup.h>
-#include <feather-tk/ui/GridLayout.h>
-#include <feather-tk/ui/Label.h>
-#include <feather-tk/ui/PushButton.h>
-#include <feather-tk/ui/RowLayout.h>
-#include <feather-tk/ui/ScrollWidget.h>
-#include <feather-tk/ui/SearchBox.h>
-#include <feather-tk/ui/ToolButton.h>
-#include <feather-tk/core/ObservableList.h>
+#include <ftk/UI/Bellows.h>
+#include <ftk/UI/ButtonGroup.h>
+#include <ftk/UI/GridLayout.h>
+#include <ftk/UI/Label.h>
+#include <ftk/UI/PushButton.h>
+#include <ftk/UI/RowLayout.h>
+#include <ftk/UI/ScrollWidget.h>
+#include <ftk/UI/SearchBox.h>
+#include <ftk/UI/ToolButton.h>
+#include <ftk/Core/ObservableList.h>
 
 #include <utility>
 
diff --git a/lib/toucanView/ExportTool.cpp b/lib/toucanView/ExportTool.cpp
index 921a397..51090ce 100644
--- a/lib/toucanView/ExportTool.cpp
+++ b/lib/toucanView/ExportTool.cpp
@@ -9,12 +9,12 @@
 
 #include <toucanRender/Util.h>
 
-#include <feather-tk/ui/DialogSystem.h>
-#include <feather-tk/ui/GridLayout.h>
-#include <feather-tk/ui/Settings.h>
-#include <feather-tk/ui/Window.h>
-#include <feather-tk/core/Context.h>
-#include <feather-tk/core/Format.h>
+#include <ftk/UI/DialogSystem.h>
+#include <ftk/UI/GridLayout.h>
+#include <ftk/UI/Settings.h>
+#include <ftk/UI/Window.h>
+#include <ftk/Core/Context.h>
+#include <ftk/Core/Format.h>
 
 #include <OpenImageIO/imagebufalgo.h>
 
diff --git a/lib/toucanView/ExportTool.h b/lib/toucanView/ExportTool.h
index 61266d6..1f9a737 100644
--- a/lib/toucanView/ExportTool.h
+++ b/lib/toucanView/ExportTool.h
@@ -8,20 +8,20 @@
 #include <toucanRender/FFmpegWrite.h>
 #include <toucanRender/ImageGraph.h>
 
-#include <feather-tk/ui/ComboBox.h>
-#include <feather-tk/ui/Divider.h>
-#include <feather-tk/ui/FileEdit.h>
-#include <feather-tk/ui/IntEdit.h>
-#include <feather-tk/ui/Label.h>
-#include <feather-tk/ui/LineEdit.h>
-#include <feather-tk/ui/ProgressDialog.h>
-#include <feather-tk/ui/PushButton.h>
-#include <feather-tk/ui/RowLayout.h>
-#include <feather-tk/ui/ScrollWidget.h>
-#include <feather-tk/ui/Settings.h>
-#include <feather-tk/ui/TabWidget.h>
-#include <feather-tk/ui/ToolButton.h>
-#include <feather-tk/core/Timer.h>
+#include <ftk/UI/ComboBox.h>
+#include <ftk/UI/Divider.h>
+#include <ftk/UI/FileEdit.h>
+#include <ftk/UI/IntEdit.h>
+#include <ftk/UI/Label.h>
+#include <ftk/UI/LineEdit.h>
+#include <ftk/UI/ProgressDialog.h>
+#include <ftk/UI/PushButton.h>
+#include <ftk/UI/RowLayout.h>
+#include <ftk/UI/ScrollWidget.h>
+#include <ftk/UI/Settings.h>
+#include <ftk/UI/TabWidget.h>
+#include <ftk/UI/ToolButton.h>
+#include <ftk/Core/Timer.h>
 
 namespace toucan
 {
diff --git a/lib/toucanView/File.cpp b/lib/toucanView/File.cpp
index c8d53e9..8410f96 100644
--- a/lib/toucanView/File.cpp
+++ b/lib/toucanView/File.cpp
@@ -9,7 +9,7 @@
 
 #include <toucanRender/TimelineWrapper.h>
 
-#include <feather-tk/core/Math.h>
+#include <ftk/Core/Math.h>
 
 namespace toucan
 {
diff --git a/lib/toucanView/File.h b/lib/toucanView/File.h
index 9dd210d..c8c1613 100644
--- a/lib/toucanView/File.h
+++ b/lib/toucanView/File.h
@@ -7,9 +7,9 @@
 #include <toucanRender/ImageGraph.h>
 #include <toucanRender/TimelineWrapper.h>
 
-#include <feather-tk/core/Context.h>
-#include <feather-tk/core/Image.h>
-#include <feather-tk/core/ObservableValue.h>
+#include <ftk/Core/Context.h>
+#include <ftk/Core/Image.h>
+#include <ftk/Core/ObservableValue.h>
 
 #include <filesystem>
 
diff --git a/lib/toucanView/FileMenu.cpp b/lib/toucanView/FileMenu.cpp
index 40c6e1a..9cd1d7b 100644
--- a/lib/toucanView/FileMenu.cpp
+++ b/lib/toucanView/FileMenu.cpp
@@ -10,10 +10,10 @@
 
 #include <toucanRender/Read.h>
 
-#include <feather-tk/ui/Action.h>
-#include <feather-tk/ui/FileBrowser.h>
-#include <feather-tk/ui/RecentFilesModel.h>
-#include <feather-tk/core/Format.h>
+#include <ftk/UI/Action.h>
+#include <ftk/UI/FileBrowser.h>
+#include <ftk/UI/RecentFilesModel.h>
+#include <ftk/Core/Format.h>
 
 namespace toucan
 {
diff --git a/lib/toucanView/FileMenu.h b/lib/toucanView/FileMenu.h
index 0f59dff..14cf2f6 100644
--- a/lib/toucanView/FileMenu.h
+++ b/lib/toucanView/FileMenu.h
@@ -3,9 +3,9 @@
 
 #pragma once
 
-#include <feather-tk/ui/Menu.h>
-#include <feather-tk/core/ObservableList.h>
-#include <feather-tk/core/ObservableValue.h>
+#include <ftk/UI/Menu.h>
+#include <ftk/Core/ObservableList.h>
+#include <ftk/Core/ObservableValue.h>
 
 #include <filesystem>
 #include <map>
diff --git a/lib/toucanView/FileTab.h b/lib/toucanView/FileTab.h
index d80f5c7..1630833 100644
--- a/lib/toucanView/FileTab.h
+++ b/lib/toucanView/FileTab.h
@@ -5,7 +5,7 @@
 
 #include <toucanView/ViewModel.h>
 
-#include <feather-tk/ui/IWidget.h>
+#include <ftk/UI/IWidget.h>
 
 namespace toucan
 {
diff --git a/lib/toucanView/FileToolBar.h b/lib/toucanView/FileToolBar.h
index 3779dd2..6eb0fe6 100644
--- a/lib/toucanView/FileToolBar.h
+++ b/lib/toucanView/FileToolBar.h
@@ -3,10 +3,10 @@
 
 #pragma once
 
-#include <feather-tk/ui/Action.h>
-#include <feather-tk/ui/RowLayout.h>
-#include <feather-tk/ui/ToolButton.h>
-#include <feather-tk/core/ObservableList.h>
+#include <ftk/UI/Action.h>
+#include <ftk/UI/RowLayout.h>
+#include <ftk/UI/ToolButton.h>
+#include <ftk/Core/ObservableList.h>
 
 namespace toucan
 {
diff --git a/lib/toucanView/FilesModel.cpp b/lib/toucanView/FilesModel.cpp
index 95923f1..4ba00f1 100644
--- a/lib/toucanView/FilesModel.cpp
+++ b/lib/toucanView/FilesModel.cpp
@@ -5,9 +5,9 @@
 
 #include "PlaybackModel.h"
 
-#include <feather-tk/core/Error.h>
-#include <feather-tk/core/Math.h>
-#include <feather-tk/core/String.h>
+#include <ftk/Core/Error.h>
+#include <ftk/Core/Math.h>
+#include <ftk/Core/String.h>
 
 #include <nlohmann/json.hpp>
 
diff --git a/lib/toucanView/FilesModel.h b/lib/toucanView/FilesModel.h
index d913470..b847323 100644
--- a/lib/toucanView/FilesModel.h
+++ b/lib/toucanView/FilesModel.h
@@ -6,11 +6,11 @@
 #include <toucanView/File.h>
 #include <toucanView/PlaybackModel.h>
 
-#include <feather-tk/ui/RecentFilesModel.h>
-#include <feather-tk/ui/Settings.h>
-#include <feather-tk/core/Context.h>
-#include <feather-tk/core/ObservableList.h>
-#include <feather-tk/core/ObservableValue.h>
+#include <ftk/UI/RecentFilesModel.h>
+#include <ftk/UI/Settings.h>
+#include <ftk/Core/Context.h>
+#include <ftk/Core/ObservableList.h>
+#include <ftk/Core/ObservableValue.h>
 
 namespace toucan
 {
diff --git a/lib/toucanView/GapItem.cpp b/lib/toucanView/GapItem.cpp
index 1090b31..424cc57 100644
--- a/lib/toucanView/GapItem.cpp
+++ b/lib/toucanView/GapItem.cpp
@@ -5,7 +5,7 @@
 
 #include "File.h"
 
-#include <feather-tk/ui/DrawUtil.h>
+#include <ftk/UI/DrawUtil.h>
 
 namespace toucan
 {
diff --git a/lib/toucanView/GapItem.h b/lib/toucanView/GapItem.h
index f52c749..b20671e 100644
--- a/lib/toucanView/GapItem.h
+++ b/lib/toucanView/GapItem.h
@@ -5,7 +5,7 @@
 
 #include <toucanView/MarkerItem.h>
 
-#include <feather-tk/ui/RowLayout.h>
+#include <ftk/UI/RowLayout.h>
 
 #include <opentimelineio/gap.h>
 
diff --git a/lib/toucanView/GraphTool.cpp b/lib/toucanView/GraphTool.cpp
index b7918b5..e1717ba 100644
--- a/lib/toucanView/GraphTool.cpp
+++ b/lib/toucanView/GraphTool.cpp
@@ -6,7 +6,7 @@
 #include "App.h"
 #include "FilesModel.h"
 
-#include <feather-tk/ui/Spacer.h>
+#include <ftk/UI/Spacer.h>
 
 namespace toucan
 {
diff --git a/lib/toucanView/GraphTool.h b/lib/toucanView/GraphTool.h
index 8c516b3..5f62183 100644
--- a/lib/toucanView/GraphTool.h
+++ b/lib/toucanView/GraphTool.h
@@ -7,10 +7,10 @@
 
 #include <toucanRender/ImageGraph.h>
 
-#include <feather-tk/ui/ButtonGroup.h>
-#include <feather-tk/ui/PushButton.h>
-#include <feather-tk/ui/RowLayout.h>
-#include <feather-tk/ui/ScrollWidget.h>
+#include <ftk/UI/ButtonGroup.h>
+#include <ftk/UI/PushButton.h>
+#include <ftk/UI/RowLayout.h>
+#include <ftk/UI/ScrollWidget.h>
 
 namespace toucan
 {
diff --git a/lib/toucanView/HUDWidget.cpp b/lib/toucanView/HUDWidget.cpp
index 54e3216..f882be0 100644
--- a/lib/toucanView/HUDWidget.cpp
+++ b/lib/toucanView/HUDWidget.cpp
@@ -6,8 +6,8 @@
 #include "App.h"
 #include "FilesModel.h"
 
-#include <feather-tk/ui/Spacer.h>
-#include <feather-tk/core/Format.h>
+#include <ftk/UI/Spacer.h>
+#include <ftk/Core/Format.h>
 
 namespace toucan
 {
diff --git a/lib/toucanView/HUDWidget.h b/lib/toucanView/HUDWidget.h
index 9013f11..8634eaf 100644
--- a/lib/toucanView/HUDWidget.h
+++ b/lib/toucanView/HUDWidget.h
@@ -5,8 +5,8 @@
 
 #include <toucanView/PlaybackModel.h>
 
-#include <feather-tk/ui/RowLayout.h>
-#include <feather-tk/ui/Label.h>
+#include <ftk/UI/RowLayout.h>
+#include <ftk/UI/Label.h>
 
 namespace toucan
 {
diff --git a/lib/toucanView/IItem.cpp b/lib/toucanView/IItem.cpp
index bf1fdb0..e514212 100644
--- a/lib/toucanView/IItem.cpp
+++ b/lib/toucanView/IItem.cpp
@@ -50,7 +50,7 @@ namespace toucan
         if (value == _selected)
             return;
         _selected = value;
-        _setDrawUpdate();
+        setDrawUpdate();
     }
 
     void IItem::mousePressEvent(ftk::MouseClickEvent& event)
diff --git a/lib/toucanView/IItem.h b/lib/toucanView/IItem.h
index 6a80ef8..feef60c 100644
--- a/lib/toucanView/IItem.h
+++ b/lib/toucanView/IItem.h
@@ -7,9 +7,9 @@
 #include <toucanView/TimeLayout.h>
 #include <toucanView/TimeUnitsModel.h>
 
-#include <feather-tk/ui/IWidget.h>
-#include <feather-tk/ui/Menu.h>
-#include <feather-tk/core/LRUCache.h>
+#include <ftk/UI/IWidget.h>
+#include <ftk/UI/Menu.h>
+#include <ftk/Core/LRUCache.h>
 
 #include <opentimelineio/timeline.h>
 
diff --git a/lib/toucanView/IToolWidget.h b/lib/toucanView/IToolWidget.h
index e986d56..52df2f4 100644
--- a/lib/toucanView/IToolWidget.h
+++ b/lib/toucanView/IToolWidget.h
@@ -3,7 +3,7 @@
 
 #pragma once
 
-#include <feather-tk/ui/IWidget.h>
+#include <ftk/UI/IWidget.h>
 
 namespace toucan
 {
diff --git a/lib/toucanView/InfoBar.cpp b/lib/toucanView/InfoBar.cpp
index bfcb94b..3cf7eee 100644
--- a/lib/toucanView/InfoBar.cpp
+++ b/lib/toucanView/InfoBar.cpp
@@ -6,7 +6,7 @@
 #include "App.h"
 #include "FilesModel.h"
 
-#include <feather-tk/core/Format.h>
+#include <ftk/Core/Format.h>
 
 namespace toucan
 {
diff --git a/lib/toucanView/InfoBar.h b/lib/toucanView/InfoBar.h
index bb86c65..5924d8a 100644
--- a/lib/toucanView/InfoBar.h
+++ b/lib/toucanView/InfoBar.h
@@ -3,11 +3,11 @@
 
 #pragma once
 
-#include <feather-tk/ui/Action.h>
-#include <feather-tk/ui/RowLayout.h>
-#include <feather-tk/ui/Label.h>
+#include <ftk/UI/Action.h>
+#include <ftk/UI/RowLayout.h>
+#include <ftk/UI/Label.h>
 
-#include <feather-tk/core/ObservableList.h>
+#include <ftk/Core/ObservableList.h>
 
 namespace toucan
 {
diff --git a/lib/toucanView/ItemLabel.cpp b/lib/toucanView/ItemLabel.cpp
index 6975c10..6b917c1 100644
--- a/lib/toucanView/ItemLabel.cpp
+++ b/lib/toucanView/ItemLabel.cpp
@@ -29,8 +29,8 @@ namespace toucan
         if (value == _name)
             return;
         _name = value;
-        _setSizeUpdate();
-        _setDrawUpdate();
+        setSizeUpdate();
+        setDrawUpdate();
     }
 
     void ItemLabel::setDuration(const std::string& value)
@@ -38,8 +38,8 @@ namespace toucan
         if (value == _duration)
             return;
         _duration = value;
-        _setSizeUpdate();
-        _setDrawUpdate();
+        setSizeUpdate();
+        setDrawUpdate();
     }
 
     void ItemLabel::setMarginRole(ftk::SizeRole value)
@@ -47,8 +47,8 @@ namespace toucan
         if (value == _marginRole)
             return;
         _marginRole = value;
-        _setSizeUpdate();
-        _setDrawUpdate();
+        setSizeUpdate();
+        setDrawUpdate();
     }
 
     void ItemLabel::setGeometry(const ftk::Box2I& value)
diff --git a/lib/toucanView/ItemLabel.h b/lib/toucanView/ItemLabel.h
index 3401971..dd27498 100644
--- a/lib/toucanView/ItemLabel.h
+++ b/lib/toucanView/ItemLabel.h
@@ -3,7 +3,7 @@
 
 #pragma once
 
-#include <feather-tk/ui/IWidget.h>
+#include <ftk/UI/IWidget.h>
 
 namespace toucan
 {
diff --git a/lib/toucanView/JSONTool.cpp b/lib/toucanView/JSONTool.cpp
index 5f9d927..3400eda 100644
--- a/lib/toucanView/JSONTool.cpp
+++ b/lib/toucanView/JSONTool.cpp
@@ -6,11 +6,11 @@
 #include "App.h"
 #include "FilesModel.h"
 
-#include <feather-tk/ui/Divider.h>
-#include <feather-tk/ui/Spacer.h>
-#include <feather-tk/ui/ToolButton.h>
-#include <feather-tk/core/Format.h>
-#include <feather-tk/core/String.h>
+#include <ftk/UI/Divider.h>
+#include <ftk/UI/Spacer.h>
+#include <ftk/UI/ToolButton.h>
+#include <ftk/Core/Format.h>
+#include <ftk/Core/String.h>
 
 namespace toucan
 {
diff --git a/lib/toucanView/JSONTool.h b/lib/toucanView/JSONTool.h
index 1162efd..7a64a14 100644
--- a/lib/toucanView/JSONTool.h
+++ b/lib/toucanView/JSONTool.h
@@ -6,13 +6,13 @@
 #include <toucanView/IToolWidget.h>
 #include <toucanView/SelectionModel.h>
 
-#include <feather-tk/ui/Bellows.h>
-#include <feather-tk/ui/Label.h>
-#include <feather-tk/ui/RowLayout.h>
-#include <feather-tk/ui/ScrollWidget.h>
-#include <feather-tk/ui/SearchBox.h>
-#include <feather-tk/ui/ToolButton.h>
-#include <feather-tk/core/ObservableList.h>
+#include <ftk/UI/Bellows.h>
+#include <ftk/UI/Label.h>
+#include <ftk/UI/RowLayout.h>
+#include <ftk/UI/ScrollWidget.h>
+#include <ftk/UI/SearchBox.h>
+#include <ftk/UI/ToolButton.h>
+#include <ftk/Core/ObservableList.h>
 
 #include <opentimelineio/item.h>
 
diff --git a/lib/toucanView/LogTool.cpp b/lib/toucanView/LogTool.cpp
index 787bd1d..f6c0035 100644
--- a/lib/toucanView/LogTool.cpp
+++ b/lib/toucanView/LogTool.cpp
@@ -5,9 +5,9 @@
 
 #include "App.h"
 
-#include <feather-tk/ui/Divider.h>
-#include <feather-tk/ui/Spacer.h>
-#include <feather-tk/core/String.h>
+#include <ftk/UI/Divider.h>
+#include <ftk/UI/Spacer.h>
+#include <ftk/Core/String.h>
 
 namespace toucan
 {
diff --git a/lib/toucanView/LogTool.h b/lib/toucanView/LogTool.h
index e70c851..aad30c1 100644
--- a/lib/toucanView/LogTool.h
+++ b/lib/toucanView/LogTool.h
@@ -5,12 +5,12 @@
 
 #include <toucanView/IToolWidget.h>
 
-#include <feather-tk/ui/Label.h>
-#include <feather-tk/ui/RowLayout.h>
-#include <feather-tk/ui/ScrollWidget.h>
-#include <feather-tk/ui/SearchBox.h>
-#include <feather-tk/ui/ToolButton.h>
-#include <feather-tk/core/LogSystem.h>
+#include <ftk/UI/Label.h>
+#include <ftk/UI/RowLayout.h>
+#include <ftk/UI/ScrollWidget.h>
+#include <ftk/UI/SearchBox.h>
+#include <ftk/UI/ToolButton.h>
+#include <ftk/Core/LogSystem.h>
 
 namespace toucan
 {
diff --git a/lib/toucanView/MainWindow.cpp b/lib/toucanView/MainWindow.cpp
index 3586bc6..462edb2 100644
--- a/lib/toucanView/MainWindow.cpp
+++ b/lib/toucanView/MainWindow.cpp
@@ -19,10 +19,10 @@
 #include "TimelineWidget.h"
 #include "ToolBar.h"
 
-#include <feather-tk/ui/DialogSystem.h>
-#include <feather-tk/ui/MessageDialog.h>
-#include <feather-tk/ui/Settings.h>
-#include <feather-tk/core/String.h>
+#include <ftk/UI/DialogSystem.h>
+#include <ftk/UI/MessageDialog.h>
+#include <ftk/UI/Settings.h>
+#include <ftk/Core/String.h>
 
 #include <nlohmann/json.hpp>
 
@@ -119,7 +119,7 @@ namespace toucan
         _infoBar = InfoBar::create(context, app, _layout);
 
         std::weak_ptr<App> appWeak(app);
-        _tabWidget->setTabCallback(
+        _tabWidget->setCurrentTabCallback(
             [appWeak](int index)
             {
                 if (auto app = appWeak.lock())
diff --git a/lib/toucanView/MainWindow.h b/lib/toucanView/MainWindow.h
index 33efbab..70667f7 100644
--- a/lib/toucanView/MainWindow.h
+++ b/lib/toucanView/MainWindow.h
@@ -5,12 +5,12 @@
 
 #include <toucanView/WindowModel.h>
 
-#include <feather-tk/ui/Divider.h>
-#include <feather-tk/ui/RowLayout.h>
-#include <feather-tk/ui/Splitter.h>
-#include <feather-tk/ui/TabWidget.h>
-#include <feather-tk/ui/Window.h>
-#include <feather-tk/core/ObservableList.h>
+#include <ftk/UI/Divider.h>
+#include <ftk/UI/RowLayout.h>
+#include <ftk/UI/Splitter.h>
+#include <ftk/UI/TabWidget.h>
+#include <ftk/UI/Window.h>
+#include <ftk/Core/ObservableList.h>
 
 namespace toucan
 {
diff --git a/lib/toucanView/MarkerItem.cpp b/lib/toucanView/MarkerItem.cpp
index 2653e81..de0a850 100644
--- a/lib/toucanView/MarkerItem.cpp
+++ b/lib/toucanView/MarkerItem.cpp
@@ -3,7 +3,7 @@
 
 #include "MarkerItem.h"
 
-#include <feather-tk/ui/DrawUtil.h>
+#include <ftk/UI/DrawUtil.h>
 
 namespace toucan
 {
diff --git a/lib/toucanView/MarkerItem.h b/lib/toucanView/MarkerItem.h
index fb3fe05..c07be87 100644
--- a/lib/toucanView/MarkerItem.h
+++ b/lib/toucanView/MarkerItem.h
@@ -6,7 +6,7 @@
 #include <toucanView/IItem.h>
 #include <toucanView/ItemLabel.h>
 
-#include <feather-tk/ui/RowLayout.h>
+#include <ftk/UI/RowLayout.h>
 
 #include <opentimelineio/marker.h>
 
diff --git a/lib/toucanView/MenuBar.h b/lib/toucanView/MenuBar.h
index 3c9c506..397998b 100644
--- a/lib/toucanView/MenuBar.h
+++ b/lib/toucanView/MenuBar.h
@@ -3,7 +3,7 @@
 
 #pragma once
 
-#include <feather-tk/ui/MenuBar.h>
+#include <ftk/UI/MenuBar.h>
 
 namespace toucan
 {
diff --git a/lib/toucanView/PlaybackBar.h b/lib/toucanView/PlaybackBar.h
index a0d6220..3faf451 100644
--- a/lib/toucanView/PlaybackBar.h
+++ b/lib/toucanView/PlaybackBar.h
@@ -6,9 +6,9 @@
 #include <toucanView/TimeUnitsModel.h>
 #include <toucanView/TimeWidgets.h>
 
-#include <feather-tk/ui/ComboBox.h>
-#include <feather-tk/ui/RowLayout.h>
-#include <feather-tk/ui/ToolButton.h>
+#include <ftk/UI/ComboBox.h>
+#include <ftk/UI/RowLayout.h>
+#include <ftk/UI/ToolButton.h>
 
 namespace toucan
 {
diff --git a/lib/toucanView/PlaybackMenu.cpp b/lib/toucanView/PlaybackMenu.cpp
index b75bf1d..2f3ddac 100644
--- a/lib/toucanView/PlaybackMenu.cpp
+++ b/lib/toucanView/PlaybackMenu.cpp
@@ -6,7 +6,7 @@
 #include "App.h"
 #include "FilesModel.h"
 
-#include <feather-tk/ui/Action.h>
+#include <ftk/UI/Action.h>
 
 namespace toucan
 {
diff --git a/lib/toucanView/PlaybackMenu.h b/lib/toucanView/PlaybackMenu.h
index 48eb7da..fadc943 100644
--- a/lib/toucanView/PlaybackMenu.h
+++ b/lib/toucanView/PlaybackMenu.h
@@ -5,7 +5,7 @@
 
 #include <toucanView/PlaybackModel.h>
 
-#include <feather-tk/ui/Menu.h>
+#include <ftk/UI/Menu.h>
 
 #include <map>
 
diff --git a/lib/toucanView/PlaybackModel.h b/lib/toucanView/PlaybackModel.h
index 4991725..b059f5e 100644
--- a/lib/toucanView/PlaybackModel.h
+++ b/lib/toucanView/PlaybackModel.h
@@ -5,9 +5,9 @@
 
 #include <opentimelineio/timeline.h>
 
-#include <feather-tk/core/ObservableValue.h>
-#include <feather-tk/core/Timer.h>
-#include <feather-tk/core/Vector.h>
+#include <ftk/Core/ObservableValue.h>
+#include <ftk/Core/Timer.h>
+#include <ftk/Core/Vector.h>
 
 #include <optional>
 
diff --git a/lib/toucanView/SelectMenu.cpp b/lib/toucanView/SelectMenu.cpp
index 53e0dd4..73559e2 100644
--- a/lib/toucanView/SelectMenu.cpp
+++ b/lib/toucanView/SelectMenu.cpp
@@ -7,7 +7,7 @@
 #include "FilesModel.h"
 #include "SelectionModel.h"
 
-#include <feather-tk/ui/Action.h>
+#include <ftk/UI/Action.h>
 
 namespace toucan
 {
diff --git a/lib/toucanView/SelectMenu.h b/lib/toucanView/SelectMenu.h
index e2690ee..6253d24 100644
--- a/lib/toucanView/SelectMenu.h
+++ b/lib/toucanView/SelectMenu.h
@@ -3,7 +3,7 @@
 
 #pragma once
 
-#include <feather-tk/ui/Menu.h>
+#include <ftk/UI/Menu.h>
 
 #include <map>
 
diff --git a/lib/toucanView/SelectionModel.h b/lib/toucanView/SelectionModel.h
index 09acd30..cdbb4b9 100644
--- a/lib/toucanView/SelectionModel.h
+++ b/lib/toucanView/SelectionModel.h
@@ -3,7 +3,7 @@
 
 #pragma once
 
-#include <feather-tk/core/ObservableList.h>
+#include <ftk/Core/ObservableList.h>
 
 #include <opentimelineio/timeline.h>
 
diff --git a/lib/toucanView/StackItem.cpp b/lib/toucanView/StackItem.cpp
index c7fb24a..ca62c38 100644
--- a/lib/toucanView/StackItem.cpp
+++ b/lib/toucanView/StackItem.cpp
@@ -9,8 +9,8 @@
 #include "TrackItem.h"
 #include "WindowModel.h"
 
-#include <feather-tk/ui/DrawUtil.h>
-#include <feather-tk/core/RenderUtil.h>
+#include <ftk/UI/DrawUtil.h>
+#include <ftk/Core/RenderUtil.h>
 
 namespace toucan
 {
diff --git a/lib/toucanView/StackItem.h b/lib/toucanView/StackItem.h
index ce73dd7..a0200bf 100644
--- a/lib/toucanView/StackItem.h
+++ b/lib/toucanView/StackItem.h
@@ -5,7 +5,7 @@
 
 #include <toucanView/MarkerItem.h>
 
-#include <feather-tk/ui/RowLayout.h>
+#include <ftk/UI/RowLayout.h>
 
 #include <opentimelineio/stack.h>
 
diff --git a/lib/toucanView/ThumbnailGenerator.cpp b/lib/toucanView/ThumbnailGenerator.cpp
index ae521a8..86d32b1 100644
--- a/lib/toucanView/ThumbnailGenerator.cpp
+++ b/lib/toucanView/ThumbnailGenerator.cpp
@@ -10,9 +10,9 @@
 
 #include <OpenImageIO/imagebufalgo.h>
 
-#include <feather-tk/core/Context.h>
-#include <feather-tk/core/Format.h>
-#include <feather-tk/core/String.h>
+#include <ftk/Core/Context.h>
+#include <ftk/Core/Format.h>
+#include <ftk/Core/String.h>
 
 #include <sstream>
 
diff --git a/lib/toucanView/ThumbnailGenerator.h b/lib/toucanView/ThumbnailGenerator.h
index 1d50040..338b56d 100644
--- a/lib/toucanView/ThumbnailGenerator.h
+++ b/lib/toucanView/ThumbnailGenerator.h
@@ -5,8 +5,8 @@
 
 #include <opentimelineio/item.h>
 
-#include <feather-tk/core/Image.h>
-#include <feather-tk/core/LogSystem.h>
+#include <ftk/Core/Image.h>
+#include <ftk/Core/LogSystem.h>
 
 #include <atomic>
 #include <filesystem>
diff --git a/lib/toucanView/ThumbnailsWidget.cpp b/lib/toucanView/ThumbnailsWidget.cpp
index 14a93b5..a540a54 100644
--- a/lib/toucanView/ThumbnailsWidget.cpp
+++ b/lib/toucanView/ThumbnailsWidget.cpp
@@ -7,7 +7,7 @@
 #include <toucanRender/TimelineWrapper.h>
 #include <toucanRender/Util.h>
 
-#include <feather-tk/ui/DrawUtil.h>
+#include <ftk/UI/DrawUtil.h>
 
 namespace toucan
 {
@@ -79,7 +79,7 @@ namespace toucan
                 const std::string cacheKey = getThumbnailCacheKey(_item, i->time, _size.thumbnailHeight);
                 const auto image = i->future.get();
                 _thumbnailCache->add(cacheKey, image);
-                _setDrawUpdate();
+                setDrawUpdate();
                 i = _thumbnailRequests.erase(i);
             }
             else
diff --git a/lib/toucanView/ThumbnailsWidget.h b/lib/toucanView/ThumbnailsWidget.h
index 42a3f73..02b3fcb 100644
--- a/lib/toucanView/ThumbnailsWidget.h
+++ b/lib/toucanView/ThumbnailsWidget.h
@@ -6,7 +6,7 @@
 #include <toucanView/ThumbnailGenerator.h>
 #include <toucanView/TimeLayout.h>
 
-#include <feather-tk/core/LRUCache.h>
+#include <ftk/Core/LRUCache.h>
 
 #include <opentimelineio/item.h>
 
diff --git a/lib/toucanView/TimeLayout.cpp b/lib/toucanView/TimeLayout.cpp
index 1958fad..e1c0f50 100644
--- a/lib/toucanView/TimeLayout.cpp
+++ b/lib/toucanView/TimeLayout.cpp
@@ -11,7 +11,7 @@ namespace toucan
         const std::string& objectName,
         const std::shared_ptr<ftk::IWidget>& parent)
     {
-        ftk::IWidget::_init(context, objectName, parent);
+        ftk::IMouseWidget::_init(context, objectName, parent);
         _timeRange = timeRange;
     }
 
@@ -40,7 +40,7 @@ namespace toucan
                 item->setScale(value);
             }
         }
-        _setSizeUpdate();
+        setSizeUpdate();
     }
 
     int ITimeWidget::getMinWidth() const
diff --git a/lib/toucanView/TimeLayout.h b/lib/toucanView/TimeLayout.h
index 2e061e8..f86600b 100644
--- a/lib/toucanView/TimeLayout.h
+++ b/lib/toucanView/TimeLayout.h
@@ -3,14 +3,14 @@
 
 #pragma once
 
-#include <feather-tk/ui/IWidget.h>
+#include <ftk/UI/IMouseWidget.h>
 
 #include <opentimelineio/version.h>
 
 namespace toucan
 {
     //! Base class for widgets in a time layout.
-    class ITimeWidget : public ftk::IWidget
+    class ITimeWidget : public ftk::IMouseWidget
     {
     protected:
         void _init(
diff --git a/lib/toucanView/TimeMenu.cpp b/lib/toucanView/TimeMenu.cpp
index 2de9a28..cbf0d1a 100644
--- a/lib/toucanView/TimeMenu.cpp
+++ b/lib/toucanView/TimeMenu.cpp
@@ -7,7 +7,7 @@
 #include "FilesModel.h"
 #include "PlaybackModel.h"
 
-#include <feather-tk/ui/Action.h>
+#include <ftk/UI/Action.h>
 
 namespace toucan
 {
diff --git a/lib/toucanView/TimeMenu.h b/lib/toucanView/TimeMenu.h
index 589c73e..0d8bee4 100644
--- a/lib/toucanView/TimeMenu.h
+++ b/lib/toucanView/TimeMenu.h
@@ -5,7 +5,7 @@
 
 #include <toucanView/SelectionModel.h>
 
-#include <feather-tk/ui/Menu.h>
+#include <ftk/UI/Menu.h>
 
 #include <opentimelineio/version.h>
 
diff --git a/lib/toucanView/TimeUnitsModel.cpp b/lib/toucanView/TimeUnitsModel.cpp
index 536d040..fe2a85c 100644
--- a/lib/toucanView/TimeUnitsModel.cpp
+++ b/lib/toucanView/TimeUnitsModel.cpp
@@ -3,10 +3,10 @@
 
 #include "TimeUnitsModel.h"
 
-#include <feather-tk/ui/Settings.h>
-#include <feather-tk/core/Error.h>
-#include <feather-tk/core/Format.h>
-#include <feather-tk/core/String.h>
+#include <ftk/UI/Settings.h>
+#include <ftk/Core/Error.h>
+#include <ftk/Core/Format.h>
+#include <ftk/Core/String.h>
 
 #include <nlohmann/json.hpp>
 
diff --git a/lib/toucanView/TimeUnitsModel.h b/lib/toucanView/TimeUnitsModel.h
index cc4171e..c1944e0 100644
--- a/lib/toucanView/TimeUnitsModel.h
+++ b/lib/toucanView/TimeUnitsModel.h
@@ -3,9 +3,9 @@
 
 #pragma once
 
-#include <feather-tk/ui/Settings.h>
-#include <feather-tk/core/Context.h>
-#include <feather-tk/core/ObservableValue.h>
+#include <ftk/UI/Settings.h>
+#include <ftk/Core/Context.h>
+#include <ftk/Core/ObservableValue.h>
 
 #include <opentimelineio/version.h>
 
diff --git a/lib/toucanView/TimeWidgets.cpp b/lib/toucanView/TimeWidgets.cpp
index 664b572..039bb2d 100644
--- a/lib/toucanView/TimeWidgets.cpp
+++ b/lib/toucanView/TimeWidgets.cpp
@@ -3,7 +3,7 @@
 
 #include "TimeWidgets.h"
 
-#include <feather-tk/ui/ToolButton.h>
+#include <ftk/UI/ToolButton.h>
 
 #include <sstream>
 
diff --git a/lib/toucanView/TimeWidgets.h b/lib/toucanView/TimeWidgets.h
index 9e01d82..95906a0 100644
--- a/lib/toucanView/TimeWidgets.h
+++ b/lib/toucanView/TimeWidgets.h
@@ -6,11 +6,11 @@
 #include <toucanView/PlaybackModel.h>
 #include <toucanView/TimeUnitsModel.h>
 
-#include <feather-tk/ui/ButtonGroup.h>
-#include <feather-tk/ui/IncButtons.h>
-#include <feather-tk/ui/Label.h>
-#include <feather-tk/ui/LineEdit.h>
-#include <feather-tk/ui/RowLayout.h>
+#include <ftk/UI/ButtonGroup.h>
+#include <ftk/UI/IncButtons.h>
+#include <ftk/UI/Label.h>
+#include <ftk/UI/LineEdit.h>
+#include <ftk/UI/RowLayout.h>
 
 #include <opentimelineio/anyVector.h>
 
diff --git a/lib/toucanView/TimelineItem.cpp b/lib/toucanView/TimelineItem.cpp
index f8eb861..3f746ee 100644
--- a/lib/toucanView/TimelineItem.cpp
+++ b/lib/toucanView/TimelineItem.cpp
@@ -9,7 +9,7 @@
 #include "ThumbnailsWidget.h"
 #include "WindowModel.h"
 
-#include <feather-tk/ui/ScrollArea.h>
+#include <ftk/UI/ScrollArea.h>
 
 namespace toucan
 {
@@ -73,7 +73,7 @@ namespace toucan
         if (value == _currentTime)
             return;
         _currentTime = value;
-        _setDrawUpdate();
+        setDrawUpdate();
     }
 
     void TimelineItem::setCurrentTimeCallback(const std::function<void(const OTIO_NS::RationalTime&)>& value)
@@ -86,7 +86,7 @@ namespace toucan
         if (value == _inOutRange)
             return;
         _inOutRange = value;
-        _setDrawUpdate();
+        setDrawUpdate();
     }
 
     void TimelineItem::setGeometry(const ftk::Box2I& value)
@@ -200,7 +200,7 @@ namespace toucan
             {
                 _currentTimeCallback(_currentTime);
             }
-            _setDrawUpdate();
+            setDrawUpdate();
         }
     }
 
@@ -257,7 +257,7 @@ namespace toucan
                 {
                     _currentTimeCallback(_currentTime);
                 }
-                _setDrawUpdate();
+                setDrawUpdate();
             }
         }
     }
@@ -274,8 +274,8 @@ namespace toucan
 
     void TimelineItem::_timeUnitsUpdate()
     {
-        _setSizeUpdate();
-        _setDrawUpdate();
+        setSizeUpdate();
+        setDrawUpdate();
     }
 
     ftk::Size2I TimelineItem::_getLabelMaxSize(
diff --git a/lib/toucanView/TimelineItem.h b/lib/toucanView/TimelineItem.h
index aae655f..b1914a4 100644
--- a/lib/toucanView/TimelineItem.h
+++ b/lib/toucanView/TimelineItem.h
@@ -6,7 +6,7 @@
 #include <toucanView/IItem.h>
 #include <toucanView/SelectionModel.h>
 
-#include <feather-tk/core/ObservableList.h>
+#include <ftk/Core/ObservableList.h>
 
 namespace toucan
 {
diff --git a/lib/toucanView/TimelineWidget.cpp b/lib/toucanView/TimelineWidget.cpp
index c2906a6..dfe91f3 100644
--- a/lib/toucanView/TimelineWidget.cpp
+++ b/lib/toucanView/TimelineWidget.cpp
@@ -20,7 +20,7 @@ namespace toucan
         const std::shared_ptr<App>& app,
         const std::shared_ptr<IWidget>& parent)
     {
-        IWidget::_init(context, "toucan::TimelineWidget", parent);
+        IMouseWidget::_init(context, "toucan::TimelineWidget", parent);
 
         _setMouseHoverEnabled(true);
         _setMousePressEnabled(
@@ -118,8 +118,8 @@ namespace toucan
                     _currentTimeObserver.reset();
                 }
 
-                _setSizeUpdate();
-                _setDrawUpdate();
+                setSizeUpdate();
+                setDrawUpdate();
             });
     }
 
@@ -182,14 +182,14 @@ namespace toucan
         {
             _timelineItem->setScale(_scale);
         }
-        _setSizeUpdate();
-        _setDrawUpdate();
+        setSizeUpdate();
+        setDrawUpdate();
     }
 
     void TimelineWidget::setGeometry(const ftk::Box2I& value)
     {
         const ftk::Box2I viewportPrev = _scrollWidget->getViewport();
-        IWidget::setGeometry(value);
+        IMouseWidget::setGeometry(value);
         _scrollWidget->setGeometry(value);
         const bool changed = _scrollWidget->getViewport() != viewportPrev;
         if (_sizeInit)
@@ -218,13 +218,12 @@ namespace toucan
 
     void TimelineWidget::sizeHintEvent(const ftk::SizeHintEvent& event)
     {
-        IWidget::sizeHintEvent(event);
         _setSizeHint(_scrollWidget->getSizeHint());
     }
 
     void TimelineWidget::mouseMoveEvent(ftk::MouseMoveEvent& event)
     {
-        IWidget::mouseMoveEvent(event);
+        IMouseWidget::mouseMoveEvent(event);
         switch (_mouse.mode)
         {
         case MouseMode::Scroll:
@@ -240,7 +239,7 @@ namespace toucan
 
     void TimelineWidget::mousePressEvent(ftk::MouseClickEvent& event)
     {
-        IWidget::mousePressEvent(event);
+        IMouseWidget::mousePressEvent(event);
         if (1 == event.button &&
             static_cast<int>(ftk::KeyModifier::Alt) == event.modifiers)
         {
@@ -257,13 +256,13 @@ namespace toucan
 
     void TimelineWidget::mouseReleaseEvent(ftk::MouseClickEvent& event)
     {
-        IWidget::mouseReleaseEvent(event);
+        IMouseWidget::mouseReleaseEvent(event);
         event.accept = true;
     }
 
     void TimelineWidget::scrollEvent(ftk::ScrollEvent& event)
     {
-        IWidget::scrollEvent(event);
+        IMouseWidget::scrollEvent(event);
         event.accept = true;
         if (event.value.y > 0)
         {
diff --git a/lib/toucanView/TimelineWidget.h b/lib/toucanView/TimelineWidget.h
index 9567716..5a958eb 100644
--- a/lib/toucanView/TimelineWidget.h
+++ b/lib/toucanView/TimelineWidget.h
@@ -6,8 +6,9 @@
 #include <toucanView/PlaybackModel.h>
 #include <toucanView/TimeUnitsModel.h>
 
-#include <feather-tk/ui/ScrollWidget.h>
-#include <feather-tk/core/ObservableList.h>
+#include <ftk/UI/IMouseWidget.h>
+#include <ftk/UI/ScrollWidget.h>
+#include <ftk/Core/ObservableList.h>
 
 #include <opentimelineio/timeline.h>
 
@@ -19,7 +20,7 @@ namespace toucan
     class ThumbnailGenerator;
 
     //! Timeline widget.
-    class TimelineWidget : public ftk::IWidget
+    class TimelineWidget : public ftk::IMouseWidget
     {
     protected:
         void _init(
diff --git a/lib/toucanView/ToolBar.cpp b/lib/toucanView/ToolBar.cpp
index 1bff46b..1a544c6 100644
--- a/lib/toucanView/ToolBar.cpp
+++ b/lib/toucanView/ToolBar.cpp
@@ -7,7 +7,7 @@
 #include "ViewToolBar.h"
 #include "WindowToolBar.h"
 
-#include <feather-tk/ui/Divider.h>
+#include <ftk/UI/Divider.h>
 
 namespace toucan
 {
diff --git a/lib/toucanView/ToolBar.h b/lib/toucanView/ToolBar.h
index ddc4057..7ac5329 100644
--- a/lib/toucanView/ToolBar.h
+++ b/lib/toucanView/ToolBar.h
@@ -3,8 +3,8 @@
 
 #pragma once
 
-#include <feather-tk/ui/Action.h>
-#include <feather-tk/ui/RowLayout.h>
+#include <ftk/UI/Action.h>
+#include <ftk/UI/RowLayout.h>
 
 namespace toucan
 {
diff --git a/lib/toucanView/TrackItem.cpp b/lib/toucanView/TrackItem.cpp
index 9f6b7c1..88ef3f3 100644
--- a/lib/toucanView/TrackItem.cpp
+++ b/lib/toucanView/TrackItem.cpp
@@ -8,8 +8,8 @@
 #include "GapItem.h"
 #include "VideoClipItem.h"
 
-#include <feather-tk/ui/DrawUtil.h>
-#include <feather-tk/core/RenderUtil.h>
+#include <ftk/UI/DrawUtil.h>
+#include <ftk/Core/RenderUtil.h>
 
 namespace toucan
 {
diff --git a/lib/toucanView/TrackItem.h b/lib/toucanView/TrackItem.h
index c40df2a..179862a 100644
--- a/lib/toucanView/TrackItem.h
+++ b/lib/toucanView/TrackItem.h
@@ -5,7 +5,7 @@
 
 #include <toucanView/MarkerItem.h>
 
-#include <feather-tk/ui/RowLayout.h>
+#include <ftk/UI/RowLayout.h>
 
 #include <opentimelineio/track.h>
 
diff --git a/lib/toucanView/VideoClipItem.cpp b/lib/toucanView/VideoClipItem.cpp
index c79ee5f..6893349 100644
--- a/lib/toucanView/VideoClipItem.cpp
+++ b/lib/toucanView/VideoClipItem.cpp
@@ -9,7 +9,7 @@
 
 #include <toucanRender/Util.h>
 
-#include <feather-tk/ui/DrawUtil.h>
+#include <ftk/UI/DrawUtil.h>
 
 #include <opentimelineio/externalReference.h>
 #include <opentimelineio/imageSequenceReference.h>
diff --git a/lib/toucanView/VideoClipItem.h b/lib/toucanView/VideoClipItem.h
index 28830dc..eed412b 100644
--- a/lib/toucanView/VideoClipItem.h
+++ b/lib/toucanView/VideoClipItem.h
@@ -8,7 +8,7 @@
 #include <toucanView/MarkerItem.h>
 #include <toucanView/ThumbnailsWidget.h>
 
-#include <feather-tk/ui/RowLayout.h>
+#include <ftk/UI/RowLayout.h>
 
 #include <opentimelineio/clip.h>
 
diff --git a/lib/toucanView/ViewMenu.h b/lib/toucanView/ViewMenu.h
index 0f07f09..212b089 100644
--- a/lib/toucanView/ViewMenu.h
+++ b/lib/toucanView/ViewMenu.h
@@ -5,8 +5,8 @@
 
 #include <toucanView/ViewModel.h>
 
-#include <feather-tk/ui/Menu.h>
-#include <feather-tk/core/ObservableValue.h>
+#include <ftk/UI/Menu.h>
+#include <ftk/Core/ObservableValue.h>
 
 namespace toucan
 {
diff --git a/lib/toucanView/ViewModel.cpp b/lib/toucanView/ViewModel.cpp
index ba5fb5d..40f1d4d 100644
--- a/lib/toucanView/ViewModel.cpp
+++ b/lib/toucanView/ViewModel.cpp
@@ -3,8 +3,8 @@
 
 #include "ViewModel.h"
 
-#include <feather-tk/core/Error.h>
-#include <feather-tk/core/String.h>
+#include <ftk/Core/Error.h>
+#include <ftk/Core/String.h>
 
 #include <nlohmann/json.hpp>
 
diff --git a/lib/toucanView/ViewModel.h b/lib/toucanView/ViewModel.h
index a1c84fa..54ed737 100644
--- a/lib/toucanView/ViewModel.h
+++ b/lib/toucanView/ViewModel.h
@@ -3,10 +3,10 @@
 
 #pragma once
 
-#include <feather-tk/ui/Settings.h>
-#include <feather-tk/core/Context.h>
-#include <feather-tk/core/ObservableValue.h>
-#include <feather-tk/core/RenderOptions.h>
+#include <ftk/UI/Settings.h>
+#include <ftk/Core/Context.h>
+#include <ftk/Core/ObservableValue.h>
+#include <ftk/Core/RenderOptions.h>
 
 #include <opentimelineio/timeline.h>
 
diff --git a/lib/toucanView/ViewToolBar.h b/lib/toucanView/ViewToolBar.h
index 1e0fe43..fdf1503 100644
--- a/lib/toucanView/ViewToolBar.h
+++ b/lib/toucanView/ViewToolBar.h
@@ -3,10 +3,10 @@
 
 #pragma once
 
-#include <feather-tk/ui/Action.h>
-#include <feather-tk/ui/RowLayout.h>
-#include <feather-tk/ui/ToolButton.h>
-#include <feather-tk/core/ObservableList.h>
+#include <ftk/UI/Action.h>
+#include <ftk/UI/RowLayout.h>
+#include <ftk/UI/ToolButton.h>
+#include <ftk/Core/ObservableList.h>
 
 namespace toucan
 {
diff --git a/lib/toucanView/Viewport.cpp b/lib/toucanView/Viewport.cpp
index fede292..c7f6435 100644
--- a/lib/toucanView/Viewport.cpp
+++ b/lib/toucanView/Viewport.cpp
@@ -8,7 +8,7 @@
 #include "App.h"
 #include "ViewModel.h"
 
-#include <feather-tk/ui/DrawUtil.h>
+#include <ftk/UI/DrawUtil.h>
 
 namespace toucan
 {
@@ -18,7 +18,7 @@ namespace toucan
         const std::shared_ptr<File>& file,
         const std::shared_ptr<ftk::IWidget>& parent)
     {
-        IWidget::_init(context, "toucan::Viewport", parent);
+        IMouseWidget::_init(context, "toucan::Viewport", parent);
 
         _setMouseHoverEnabled(true);
         _setMousePressEnabled(true, 0, 0);
@@ -35,7 +35,7 @@ namespace toucan
             [this](const std::shared_ptr<ftk::Image>& value)
             {
                 _image = value;
-                _setDrawUpdate();
+                setDrawUpdate();
             });
 
         _bObserver = ftk::ValueObserver<std::shared_ptr<File> >::create(
@@ -52,7 +52,7 @@ namespace toucan
                         [this](const std::shared_ptr<ftk::Image>& value)
                         {
                             _bImage = value;
-                            _setDrawUpdate();
+                            setDrawUpdate();
                         });
                 }
                 else
@@ -60,7 +60,7 @@ namespace toucan
                     _bImageSize = ftk::Size2I();
                     _bImage.reset();
                     _bImageObserver.reset();
-                    _setDrawUpdate();
+                    setDrawUpdate();
                 }
             });
 
@@ -69,7 +69,7 @@ namespace toucan
             [this](const CompareOptions& value)
             {
                 _compareOptions = value;
-                _setDrawUpdate();
+                setDrawUpdate();
             });
 
         _zoomInObserver = ftk::ValueObserver<bool>::create(
@@ -114,7 +114,7 @@ namespace toucan
             [this](const ViewOptions& value)
             {
                 _options = value;
-                _setDrawUpdate();
+                setDrawUpdate();
             });
 
         _globalOptionsObserver = ftk::ValueObserver<GlobalViewOptions>::create(
@@ -122,7 +122,7 @@ namespace toucan
             [this](const GlobalViewOptions& value)
             {
                 _globalOptions = value;
-                _setDrawUpdate();
+                setDrawUpdate();
             });
     }
 
@@ -167,7 +167,7 @@ namespace toucan
         changed |= _viewZoom->setIfChanged(zoom);
         if (changed)
         {
-            _setDrawUpdate();
+            setDrawUpdate();
         }
     }
 
@@ -217,14 +217,12 @@ namespace toucan
         if (_frameView->setIfChanged(value))
         {
             _viewModel->setFrameView(value);
-            _setDrawUpdate();
+            setDrawUpdate();
         }
     }
 
     void Viewport::drawEvent(const ftk::Box2I& drawRect, const ftk::DrawEvent& event)
     {
-        IWidget::drawEvent(drawRect, event);
-
         // Draw the background.
         const ftk::Box2I& g = getGeometry();
         switch (_globalOptions.background)
@@ -247,10 +245,10 @@ namespace toucan
         {
             _frameUpdate();
         }
-        ftk::M44F vm;
-        vm = vm * ftk::translate(ftk::V3F(g.min.x, g.min.y, 0.F));
-        vm = vm * ftk::translate(ftk::V3F(_viewPos->get().x, _viewPos->get().y, 0.F));
-        vm = vm * ftk::scale(ftk::V3F(_viewZoom->get(), _viewZoom->get(), 1.F));
+        const ftk::M44F vm =
+            ftk::translate(ftk::V3F(g.min.x, g.min.y, 0.F)) *
+            ftk::translate(ftk::V3F(_viewPos->get().x, _viewPos->get().y, 0.F)) *
+            ftk::scale(ftk::V3F(_viewZoom->get(), _viewZoom->get(), 1.F));
         const auto m = event.render->getTransform();
         event.render->setTransform(m * vm);
 
@@ -320,18 +318,18 @@ namespace toucan
                 mesh.t.push_back(ftk::V2F(_options.flop ? 1.F : 0.F, _options.flip ? 0.F : 1.F));
                 ftk::Triangle2 triangle;
                 triangle.v[0].v = 1;
-                triangle.v[1].v = 2;
-                triangle.v[2].v = 3;
+                triangle.v[1].v = 3;
+                triangle.v[2].v = 2;
                 triangle.v[0].t = 1;
-                triangle.v[1].t = 2;
-                triangle.v[2].t = 3;
+                triangle.v[1].t = 3;
+                triangle.v[2].t = 2;
                 mesh.triangles.push_back(triangle);
                 triangle.v[0].v = 3;
-                triangle.v[1].v = 4;
-                triangle.v[2].v = 1;
+                triangle.v[1].v = 1;
+                triangle.v[2].v = 4;
                 triangle.v[0].t = 3;
-                triangle.v[1].t = 4;
-                triangle.v[2].t = 1;
+                triangle.v[1].t = 1;
+                triangle.v[2].t = 4;
                 mesh.triangles.push_back(triangle);
                 event.render->drawImage(
                     _image,
@@ -357,18 +355,18 @@ namespace toucan
                 mesh.t.push_back(ftk::V2F(_options.flop ? .5F : .5F, _options.flip ? 0.F : 1.F));
                 ftk::Triangle2 triangle;
                 triangle.v[0].v = 1;
-                triangle.v[1].v = 2;
-                triangle.v[2].v = 3;
+                triangle.v[1].v = 3;
+                triangle.v[2].v = 2;
                 triangle.v[0].t = 1;
-                triangle.v[1].t = 2;
-                triangle.v[2].t = 3;
+                triangle.v[1].t = 3;
+                triangle.v[2].t = 2;
                 mesh.triangles.push_back(triangle);
                 triangle.v[0].v = 3;
-                triangle.v[1].v = 4;
-                triangle.v[2].v = 1;
+                triangle.v[1].v = 1;
+                triangle.v[2].v = 4;
                 triangle.v[0].t = 3;
-                triangle.v[1].t = 4;
-                triangle.v[2].t = 1;
+                triangle.v[1].t = 1;
+                triangle.v[2].t = 4;
                 mesh.triangles.push_back(triangle);
                 event.render->drawImage(
                     _bImage,
@@ -477,7 +475,7 @@ namespace toucan
 
     void Viewport::mouseMoveEvent(ftk::MouseMoveEvent& event)
     {
-        IWidget::mouseMoveEvent(event);
+        IMouseWidget::mouseMoveEvent(event);
         if (_isMousePressed())
         {
             event.accept = true;
@@ -485,13 +483,13 @@ namespace toucan
             _viewPos->setIfChanged(ftk::V2I(
                 _viewMousePress.x + (event.pos.x - mousePressPos.x),
                 _viewMousePress.y + (event.pos.y - mousePressPos.y)));
-            _setDrawUpdate();
+            setDrawUpdate();
         }
     }
 
     void Viewport::mousePressEvent(ftk::MouseClickEvent& event)
     {
-        IWidget::mousePressEvent(event);
+        IMouseWidget::mousePressEvent(event);
         if (1 == event.button && 0 == event.modifiers)
         {
             event.accept = true;
@@ -502,13 +500,13 @@ namespace toucan
 
     void Viewport::mouseReleaseEvent(ftk::MouseClickEvent& event)
     {
-        IWidget::mouseReleaseEvent(event);
+        IMouseWidget::mouseReleaseEvent(event);
         event.accept = true;
     }
 
     void Viewport::scrollEvent(ftk::ScrollEvent& event)
     {
-        IWidget::scrollEvent(event);
+        IMouseWidget::scrollEvent(event);
         if (0 == event.modifiers)
         {
             event.accept = true;
@@ -558,18 +556,18 @@ namespace toucan
         mesh.t.push_back(ftk::V2F(_options.flop ? 1.F : 0.F, _options.flip ? 0.F : 1.F));
         ftk::Triangle2 triangle;
         triangle.v[0].v = 1;
-        triangle.v[1].v = 2;
-        triangle.v[2].v = 3;
+        triangle.v[1].v = 3;
+        triangle.v[2].v = 2;
         triangle.v[0].t = 1;
-        triangle.v[1].t = 2;
-        triangle.v[2].t = 3;
+        triangle.v[1].t = 3;
+        triangle.v[2].t = 2;
         mesh.triangles.push_back(triangle);
         triangle.v[0].v = 3;
-        triangle.v[1].v = 4;
-        triangle.v[2].v = 1;
+        triangle.v[1].v = 1;
+        triangle.v[2].v = 4;
         triangle.v[0].t = 3;
-        triangle.v[1].t = 4;
-        triangle.v[2].t = 1;
+        triangle.v[1].t = 1;
+        triangle.v[2].t = 4;
         mesh.triangles.push_back(triangle);
         return mesh;
     }
diff --git a/lib/toucanView/Viewport.h b/lib/toucanView/Viewport.h
index 95173ce..579b87b 100644
--- a/lib/toucanView/Viewport.h
+++ b/lib/toucanView/Viewport.h
@@ -6,9 +6,9 @@
 #include <toucanView/FilesModel.h>
 #include <toucanView/ViewModel.h>
 
-#include <feather-tk/ui/IWidget.h>
+#include <ftk/UI/IMouseWidget.h>
 
-#include <feather-tk/core/Image.h>
+#include <ftk/Core/Image.h>
 
 namespace toucan
 {
@@ -17,7 +17,7 @@ namespace toucan
     class ViewModel;
 
     //! Viewport widget.
-    class Viewport : public ftk::IWidget
+    class Viewport : public ftk::IMouseWidget
     {
     protected:
         void _init(
diff --git a/lib/toucanView/WindowMenu.cpp b/lib/toucanView/WindowMenu.cpp
index 5df1b82..3c5b590 100644
--- a/lib/toucanView/WindowMenu.cpp
+++ b/lib/toucanView/WindowMenu.cpp
@@ -11,10 +11,10 @@
 
 #include <toucanRender/TimelineAlgo.h>
 
-#include <feather-tk/ui/Action.h>
-#include <feather-tk/ui/FileBrowser.h>
-#include <feather-tk/ui/RecentFilesModel.h>
-#include <feather-tk/core/Format.h>
+#include <ftk/UI/Action.h>
+#include <ftk/UI/FileBrowser.h>
+#include <ftk/UI/RecentFilesModel.h>
+#include <ftk/Core/Format.h>
 
 namespace toucan
 {
diff --git a/lib/toucanView/WindowMenu.h b/lib/toucanView/WindowMenu.h
index a66b0f2..c624bbf 100644
--- a/lib/toucanView/WindowMenu.h
+++ b/lib/toucanView/WindowMenu.h
@@ -5,9 +5,9 @@
 
 #include <toucanView/WindowModel.h>
 
-#include <feather-tk/ui/Menu.h>
-#include <feather-tk/core/ObservableList.h>
-#include <feather-tk/core/ObservableMap.h>
+#include <ftk/UI/Menu.h>
+#include <ftk/Core/ObservableList.h>
+#include <ftk/Core/ObservableMap.h>
 
 namespace toucan
 {
diff --git a/lib/toucanView/WindowModel.cpp b/lib/toucanView/WindowModel.cpp
index 9d615a9..1487eb8 100644
--- a/lib/toucanView/WindowModel.cpp
+++ b/lib/toucanView/WindowModel.cpp
@@ -3,9 +3,9 @@
 
 #include "WindowModel.h"
 
-#include <feather-tk/ui/Settings.h>
-#include <feather-tk/core/Error.h>
-#include <feather-tk/core/String.h>
+#include <ftk/UI/Settings.h>
+#include <ftk/Core/Error.h>
+#include <ftk/Core/String.h>
 
 #include <nlohmann/json.hpp>
 
diff --git a/lib/toucanView/WindowModel.h b/lib/toucanView/WindowModel.h
index 4d9fee9..b64cc6b 100644
--- a/lib/toucanView/WindowModel.h
+++ b/lib/toucanView/WindowModel.h
@@ -3,10 +3,10 @@
 
 #pragma once
 
-#include <feather-tk/ui/Settings.h>
-#include <feather-tk/core/Context.h>
-#include <feather-tk/core/ObservableMap.h>
-#include <feather-tk/core/ObservableValue.h>
+#include <ftk/UI/Settings.h>
+#include <ftk/Core/Context.h>
+#include <ftk/Core/ObservableMap.h>
+#include <ftk/Core/ObservableValue.h>
 
 namespace toucan
 {
diff --git a/lib/toucanView/WindowToolBar.h b/lib/toucanView/WindowToolBar.h
index 15fa3c8..4def544 100644
--- a/lib/toucanView/WindowToolBar.h
+++ b/lib/toucanView/WindowToolBar.h
@@ -5,10 +5,10 @@
 
 #include <toucanView/WindowModel.h>
 
-#include <feather-tk/ui/Action.h>
-#include <feather-tk/ui/RowLayout.h>
-#include <feather-tk/ui/ToolButton.h>
-#include <feather-tk/core/ObservableList.h>
+#include <ftk/UI/Action.h>
+#include <ftk/UI/RowLayout.h>
+#include <ftk/UI/ToolButton.h>
+#include <ftk/Core/ObservableList.h>
 
 namespace toucan
 {
diff --git a/tests/toucan-test/main.cpp b/tests/toucan-test/main.cpp
index 7e2d90c..019be19 100644
--- a/tests/toucan-test/main.cpp
+++ b/tests/toucan-test/main.cpp
@@ -17,9 +17,9 @@
 #include <toucanRender/Util.h>
 
 #if defined(toucan_VIEW)
-#include <feather-tk/ui/Init.h>
+#include <ftk/UI/Init.h>
 #endif // toucan_VIEW
-#include <feather-tk/core/Context.h>
+#include <ftk/Core/Context.h>
 
 #include <iostream>
 
diff --git a/tests/toucanViewTest/FilesModelTest.h b/tests/toucanViewTest/FilesModelTest.h
index bc25df7..859ae14 100644
--- a/tests/toucanViewTest/FilesModelTest.h
+++ b/tests/toucanViewTest/FilesModelTest.h
@@ -5,7 +5,7 @@
 
 #include <toucanRender/ImageEffectHost.h>
 
-#include <feather-tk/core/Context.h>
+#include <ftk/Core/Context.h>
 
 namespace toucan
 {
diff --git a/tests/toucanViewTest/PlaybackModelTest.h b/tests/toucanViewTest/PlaybackModelTest.h
index dc821a6..cd88590 100644
--- a/tests/toucanViewTest/PlaybackModelTest.h
+++ b/tests/toucanViewTest/PlaybackModelTest.h
@@ -3,7 +3,7 @@
 
 #pragma once
 
-#include <feather-tk/core/Context.h>
+#include <ftk/Core/Context.h>
 
 namespace toucan
 {
diff --git a/tests/toucanViewTest/SelectionModelTest.h b/tests/toucanViewTest/SelectionModelTest.h
index fccec30..45a501b 100644
--- a/tests/toucanViewTest/SelectionModelTest.h
+++ b/tests/toucanViewTest/SelectionModelTest.h
@@ -3,7 +3,7 @@
 
 #pragma once
 
-#include <feather-tk/core/Context.h>
+#include <ftk/Core/Context.h>
 
 #include <filesystem>
 
diff --git a/tests/toucanViewTest/ViewModelTest.h b/tests/toucanViewTest/ViewModelTest.h
index 020ff77..b2ca35a 100644
--- a/tests/toucanViewTest/ViewModelTest.h
+++ b/tests/toucanViewTest/ViewModelTest.h
@@ -3,7 +3,7 @@
 
 #pragma once
 
-#include <feather-tk/core/Context.h>
+#include <ftk/Core/Context.h>
 
 namespace toucan
 {
diff --git a/tests/toucanViewTest/WindowModelTest.h b/tests/toucanViewTest/WindowModelTest.h
index 9d81daf..e5fcf38 100644
--- a/tests/toucanViewTest/WindowModelTest.h
+++ b/tests/toucanViewTest/WindowModelTest.h
@@ -3,7 +3,7 @@
 
 #pragma once
 
-#include <feather-tk/core/Context.h>
+#include <ftk/Core/Context.h>
 
 namespace toucan
 {