diff --git a/libs/ui/CMakeLists.txt b/libs/ui/CMakeLists.txt
index 8bb1a881a1..8c1f23f7d1 100644
--- a/libs/ui/CMakeLists.txt
+++ b/libs/ui/CMakeLists.txt
@@ -1,609 +1,608 @@
 include_directories(
     ${CMAKE_CURRENT_SOURCE_DIR}/qtlockedfile
 )
 
 include_directories(SYSTEM
     ${EIGEN3_INCLUDE_DIR}
     ${OCIO_INCLUDE_DIR}
 )
 
 add_subdirectory( tests )
 
 if (APPLE)
     find_library(FOUNDATION_LIBRARY Foundation)
     find_library(APPKIT_LIBRARY AppKit)
 endif ()
 
 set(kritaui_LIB_SRCS
     canvas/kis_canvas_widget_base.cpp
     canvas/kis_canvas2.cpp
     canvas/kis_canvas_updates_compressor.cpp
     canvas/kis_canvas_controller.cpp
     canvas/kis_paintop_transformation_connector.cpp
     canvas/kis_display_color_converter.cpp
     canvas/kis_display_filter.cpp
     canvas/kis_exposure_gamma_correction_interface.cpp
     canvas/kis_tool_proxy.cpp
     canvas/kis_canvas_decoration.cc
     canvas/kis_coordinates_converter.cpp
     canvas/kis_grid_manager.cpp
     canvas/kis_grid_decoration.cpp
     canvas/kis_grid_config.cpp
     canvas/kis_prescaled_projection.cpp
     canvas/kis_qpainter_canvas.cpp
     canvas/kis_projection_backend.cpp
     canvas/kis_update_info.cpp
     canvas/kis_image_patch.cpp
     canvas/kis_image_pyramid.cpp
     canvas/kis_infinity_manager.cpp
     canvas/kis_change_guides_command.cpp
     canvas/kis_guides_decoration.cpp
     canvas/kis_guides_manager.cpp
     canvas/kis_guides_config.cpp
     canvas/kis_snap_config.cpp
     canvas/kis_snap_line_strategy.cpp
     canvas/KisSnapPointStrategy.cpp
     canvas/KisSnapPixelStrategy.cpp
 	canvas/KisMirrorAxisConfig.cpp
 	dialogs/kis_about_application.cpp
     dialogs/kis_dlg_adj_layer_props.cc
     dialogs/kis_dlg_adjustment_layer.cc
     dialogs/kis_dlg_filter.cpp
     dialogs/kis_dlg_generator_layer.cpp
     dialogs/kis_dlg_file_layer.cpp
     dialogs/kis_dlg_filter.cpp
     dialogs/kis_dlg_stroke_selection_properties.cpp
     dialogs/kis_dlg_image_properties.cc
     dialogs/kis_dlg_layer_properties.cc
     dialogs/kis_dlg_preferences.cc
     dialogs/slider_and_spin_box_sync.cpp
     dialogs/kis_dlg_blacklist_cleanup.cpp
     dialogs/kis_dlg_layer_style.cpp
     dialogs/kis_dlg_png_import.cpp
     dialogs/kis_dlg_import_image_sequence.cpp
     dialogs/kis_delayed_save_dialog.cpp
     dialogs/KisSessionManagerDialog.cpp
     dialogs/KisNewWindowLayoutDialog.cpp
     flake/kis_node_dummies_graph.cpp
     flake/kis_dummies_facade_base.cpp
     flake/kis_dummies_facade.cpp
     flake/kis_node_shapes_graph.cpp
     flake/kis_node_shape.cpp
     flake/kis_shape_controller.cpp
     flake/kis_shape_layer.cc
     flake/kis_shape_layer_canvas.cpp
     flake/kis_shape_selection.cpp
     flake/kis_shape_selection_canvas.cpp
     flake/kis_shape_selection_model.cpp
     flake/kis_take_all_shapes_command.cpp
     brushhud/kis_uniform_paintop_property_widget.cpp
     brushhud/kis_brush_hud.cpp
     brushhud/kis_round_hud_button.cpp
     brushhud/kis_dlg_brush_hud_config.cpp
     brushhud/kis_brush_hud_properties_list.cpp
     brushhud/kis_brush_hud_properties_config.cpp
 
     kis_aspect_ratio_locker.cpp
     kis_autogradient.cc
     kis_bookmarked_configurations_editor.cc
     kis_bookmarked_configurations_model.cc
     kis_bookmarked_filter_configurations_model.cc
     KisPaintopPropertiesBase.cpp
     kis_canvas_resource_provider.cpp
     kis_derived_resources.cpp
     kis_categories_mapper.cpp
     kis_categorized_list_model.cpp
     kis_categorized_item_delegate.cpp
     kis_clipboard.cc
     kis_config.cc
     KisOcioConfiguration.cpp
     kis_control_frame.cpp
     kis_composite_ops_model.cc
     kis_paint_ops_model.cpp
     kis_cursor.cc
     kis_cursor_cache.cpp
     kis_custom_pattern.cc
     kis_file_layer.cpp
     kis_change_file_layer_command.h
     kis_safe_document_loader.cpp
     kis_splash_screen.cpp
     kis_filter_manager.cc
     kis_filters_model.cc
-    kis_histogram_view.cc
     KisImageBarrierLockerWithFeedback.cpp
     kis_image_manager.cc
     kis_image_view_converter.cpp
     kis_import_catcher.cc
     kis_layer_manager.cc
     kis_mask_manager.cc
     kis_mimedata.cpp
     kis_node_commands_adapter.cpp
     kis_node_manager.cpp
     kis_node_juggler_compressed.cpp
     kis_node_selection_adapter.cpp
     kis_node_insertion_adapter.cpp
     KisNodeDisplayModeAdapter.cpp
     kis_node_model.cpp
     kis_node_filter_proxy_model.cpp
     kis_model_index_converter_base.cpp
     kis_model_index_converter.cpp
     kis_model_index_converter_show_all.cpp
     kis_painting_assistant.cc
     kis_painting_assistants_decoration.cpp
     KisDecorationsManager.cpp
     kis_paintop_box.cc
     kis_paintop_option.cpp
     kis_paintop_options_model.cpp
     kis_paintop_settings_widget.cpp
     kis_popup_palette.cpp
     kis_png_converter.cpp
     kis_preference_set_registry.cpp
     KisResourceServerProvider.cpp
     KisResourceBundleServerProvider.cpp
     KisSelectedShapesProxy.cpp
     kis_selection_decoration.cc
     kis_selection_manager.cc
     KisSelectionActionsAdapter.cpp
     kis_statusbar.cc
     kis_zoom_manager.cc
     kis_favorite_resource_manager.cpp
     kis_workspace_resource.cpp
     kis_action.cpp
     kis_action_manager.cpp
     KisActionPlugin.cpp
     kis_canvas_controls_manager.cpp
     kis_tooltip_manager.cpp
     kis_multinode_property.cpp
     kis_stopgradient_editor.cpp
     KisWelcomePageWidget.cpp
 
     kisexiv2/kis_exif_io.cpp
     kisexiv2/kis_exiv2.cpp
     kisexiv2/kis_iptc_io.cpp
     kisexiv2/kis_xmp_io.cpp
 
     opengl/kis_opengl.cpp
     opengl/kis_opengl_canvas2.cpp
     opengl/kis_opengl_canvas_debugger.cpp
     opengl/kis_opengl_image_textures.cpp
     opengl/kis_texture_tile.cpp
     opengl/kis_opengl_shader_loader.cpp
     opengl/kis_texture_tile_info_pool.cpp
     opengl/KisOpenGLUpdateInfoBuilder.cpp
     opengl/KisOpenGLModeProber.cpp
     opengl/KisScreenInformationAdapter.cpp
     kis_fps_decoration.cpp
 
     tool/KisToolChangesTracker.cpp
     tool/KisToolChangesTrackerData.cpp
     tool/kis_selection_tool_helper.cpp
     tool/kis_selection_tool_config_widget_helper.cpp
     tool/kis_rectangle_constraint_widget.cpp
     tool/kis_shape_tool_helper.cpp
     tool/kis_tool.cc
     tool/kis_delegated_tool_policies.cpp
     tool/kis_tool_freehand.cc
     tool/kis_speed_smoother.cpp
     tool/kis_painting_information_builder.cpp
     tool/kis_stabilized_events_sampler.cpp
     tool/kis_tool_freehand_helper.cpp
     tool/kis_tool_multihand_helper.cpp
     tool/kis_figure_painting_tool_helper.cpp
     tool/kis_tool_paint.cc
     tool/kis_tool_shape.cc
     tool/kis_tool_ellipse_base.cpp
     tool/kis_tool_rectangle_base.cpp
     tool/kis_tool_polyline_base.cpp
     tool/kis_tool_utils.cpp
     tool/kis_resources_snapshot.cpp
     tool/kis_smoothing_options.cpp
     tool/KisStabilizerDelayedPaintHelper.cpp
     tool/KisStrokeSpeedMonitor.cpp
     tool/strokes/freehand_stroke.cpp
     tool/strokes/KisStrokeEfficiencyMeasurer.cpp
     tool/strokes/kis_painter_based_stroke_strategy.cpp
     tool/strokes/kis_filter_stroke_strategy.cpp
     tool/strokes/kis_color_picker_stroke_strategy.cpp
     tool/strokes/KisFreehandStrokeInfo.cpp
     tool/strokes/KisMaskedFreehandStrokePainter.cpp
     tool/strokes/KisMaskingBrushRenderer.cpp
     tool/strokes/KisMaskingBrushCompositeOpFactory.cpp
     tool/strokes/move_stroke_strategy.cpp
     tool/KisSelectionToolFactoryBase.cpp
     tool/KisToolPaintFactoryBase.cpp
 
     widgets/kis_cmb_composite.cc
     widgets/kis_cmb_contour.cpp
     widgets/kis_cmb_gradient.cpp
     widgets/kis_paintop_list_widget.cpp
     widgets/kis_cmb_idlist.cc
     widgets/kis_color_space_selector.cc
     widgets/kis_advanced_color_space_selector.cc
     widgets/kis_cie_tongue_widget.cpp
     widgets/kis_tone_curve_widget.cpp
     widgets/kis_curve_widget.cpp
     widgets/kis_custom_image_widget.cc
     widgets/kis_image_from_clipboard_widget.cpp
     widgets/kis_double_widget.cc
     widgets/kis_filter_selector_widget.cc
     widgets/kis_gradient_chooser.cc
     widgets/kis_iconwidget.cc
     widgets/kis_mask_widgets.cpp
     widgets/kis_meta_data_merge_strategy_chooser_widget.cc
     widgets/kis_multi_bool_filter_widget.cc
     widgets/kis_multi_double_filter_widget.cc
     widgets/kis_multi_integer_filter_widget.cc
     widgets/kis_multipliers_double_slider_spinbox.cpp
     widgets/kis_paintop_presets_popup.cpp
     widgets/kis_tool_options_popup.cpp
     widgets/kis_paintop_presets_chooser_popup.cpp
     widgets/kis_paintop_presets_save.cpp
     widgets/kis_paintop_preset_icon_library.cpp
     widgets/kis_pattern_chooser.cc
 
     widgets/kis_preset_chooser.cpp
     widgets/kis_progress_widget.cpp
     widgets/kis_selection_options.cc
     widgets/kis_scratch_pad.cpp
     widgets/kis_scratch_pad_event_filter.cpp
     widgets/kis_preset_selector_strip.cpp
     widgets/kis_slider_spin_box.cpp
     widgets/KisSelectionPropertySlider.cpp
     widgets/kis_size_group.cpp
     widgets/kis_size_group_p.cpp
     widgets/kis_wdg_generator.cpp
     widgets/kis_workspace_chooser.cpp
     widgets/kis_categorized_list_view.cpp
     widgets/kis_widget_chooser.cpp
     widgets/kis_tool_button.cpp
     widgets/kis_floating_message.cpp
     widgets/kis_lod_availability_widget.cpp
     widgets/kis_color_label_selector_widget.cpp
     widgets/kis_color_filter_combo.cpp
     widgets/kis_elided_label.cpp
     widgets/kis_stopgradient_slider_widget.cpp
     widgets/kis_preset_live_preview_view.cpp
     widgets/KisScreenColorPicker.cpp
     widgets/KoDualColorButton.cpp
     widgets/KoStrokeConfigWidget.cpp
     widgets/KoFillConfigWidget.cpp
     widgets/KisLayerStyleAngleSelector.cpp
     widgets/KisMemoryReportButton.cpp
 
     KisPaletteEditor.cpp
     dialogs/KisDlgPaletteEditor.cpp
 
     widgets/KisNewsWidget.cpp
     widgets/KisGamutMaskToolbar.cpp
 
     utils/kis_document_aware_spin_box_unit_manager.cpp
     utils/KisSpinBoxSplineUnitConverter.cpp
 
     input/kis_input_manager.cpp
     input/kis_input_manager_p.cpp
     input/kis_extended_modifiers_mapper.cpp
     input/kis_abstract_input_action.cpp
     input/kis_tool_invocation_action.cpp
     input/kis_pan_action.cpp
     input/kis_alternate_invocation_action.cpp
     input/kis_rotate_canvas_action.cpp
     input/kis_zoom_action.cpp
     input/kis_change_frame_action.cpp
     input/kis_gamma_exposure_action.cpp
     input/kis_show_palette_action.cpp
     input/kis_change_primary_setting_action.cpp
     input/kis_abstract_shortcut.cpp
     input/kis_native_gesture_shortcut.cpp
     input/kis_single_action_shortcut.cpp
     input/kis_stroke_shortcut.cpp
     input/kis_shortcut_matcher.cpp
     input/kis_select_layer_action.cpp
     input/KisQtWidgetsTweaker.cpp
     input/KisInputActionGroup.cpp
 
     operations/kis_operation.cpp
     operations/kis_operation_configuration.cpp
     operations/kis_operation_registry.cpp
     operations/kis_operation_ui_factory.cpp
     operations/kis_operation_ui_widget.cpp
     operations/kis_filter_selection_operation.cpp
     actions/kis_selection_action_factories.cpp
     actions/KisPasteActionFactory.cpp
     actions/KisTransformToolActivationCommand.cpp
     input/kis_touch_shortcut.cpp
     kis_document_undo_store.cpp
     kis_gui_context_command.cpp
     kis_gui_context_command_p.cpp
     input/kis_tablet_debugger.cpp
     input/kis_input_profile_manager.cpp
     input/kis_input_profile.cpp
     input/kis_shortcut_configuration.cpp
     input/config/kis_input_configuration_page.cpp
     input/config/kis_edit_profiles_dialog.cpp
     input/config/kis_input_profile_model.cpp
     input/config/kis_input_configuration_page_item.cpp
     input/config/kis_action_shortcuts_model.cpp
     input/config/kis_input_type_delegate.cpp
     input/config/kis_input_mode_delegate.cpp
     input/config/kis_input_button.cpp
     input/config/kis_input_editor_delegate.cpp
     input/config/kis_mouse_input_editor.cpp
     input/config/kis_wheel_input_editor.cpp
     input/config/kis_key_input_editor.cpp
     processing/fill_processing_visitor.cpp
     kis_asl_layer_style_serializer.cpp
     kis_psd_layer_style_resource.cpp
     canvas/kis_mirror_axis.cpp
 
     kis_abstract_perspective_grid.cpp
     
     KisApplication.cpp
     KisAutoSaveRecoveryDialog.cpp
     KisDetailsPane.cpp
     KisDocument.cpp
     KisCloneDocumentStroke.cpp
     kis_node_view_color_scheme.cpp
     KisImportExportFilter.cpp
     KisFilterEntry.cpp
     KisImportExportManager.cpp
     KisImportExportUtils.cpp
     kis_async_action_feedback.cpp
     KisMainWindow.cpp
     KisOpenPane.cpp
     KisPart.cpp
     KisPrintJob.cpp
     KisTemplate.cpp
     KisTemplateCreateDia.cpp
     KisTemplateGroup.cpp
     KisTemplates.cpp
     KisTemplatesPane.cpp
     KisTemplateTree.cpp
     KisUndoActionsUpdateManager.cpp
     KisView.cpp
     KisImportExportErrorCode.cpp
 
     thememanager.cpp
 
     kis_mainwindow_observer.cpp
     KisViewManager.cpp
     kis_mirror_manager.cpp
 
     qtlockedfile/qtlockedfile.cpp
 
     qtsingleapplication/qtlocalpeer.cpp
     qtsingleapplication/qtsingleapplication.cpp
 
     KisResourceBundle.cpp
     KisResourceBundleManifest.cpp
 
     kis_md5_generator.cpp
     KisApplicationArguments.cpp
 
     KisNetworkAccessManager.cpp
     KisMultiFeedRSSModel.cpp
     KisRemoteFileFetcher.cpp
 
     KisSaveGroupVisitor.cpp
     KisWindowLayoutResource.cpp
     KisWindowLayoutManager.cpp
     KisSessionResource.cpp
 
     KisReferenceImagesDecoration.cpp
     KisReferenceImage.cpp
     flake/KisReferenceImagesLayer.cpp
     flake/KisReferenceImagesLayer.h
 
 )
 
 if(WIN32)
     # Private headers are needed for:
     #    * KisDlgCustomTabletResolution
     #    * KisScreenInformationAdapter
     include_directories(SYSTEM ${Qt5Gui_PRIVATE_INCLUDE_DIRS})
 
     set(kritaui_LIB_SRCS
         ${kritaui_LIB_SRCS}
         qtlockedfile/qtlockedfile_win.cpp
     )
     if (NOT USE_QT_TABLET_WINDOWS)
         set(kritaui_LIB_SRCS
             ${kritaui_LIB_SRCS}
             input/wintab/kis_tablet_support_win.cpp
             input/wintab/kis_screen_size_choice_dialog.cpp
             input/wintab/kis_tablet_support_win8.cpp
             )
     else()
         set(kritaui_LIB_SRCS
             ${kritaui_LIB_SRCS}
             dialogs/KisDlgCustomTabletResolution.cpp
             )
     endif()
 endif()
 
     set(kritaui_LIB_SRCS
         ${kritaui_LIB_SRCS}
         kis_animation_frame_cache.cpp
         kis_animation_cache_populator.cpp
         KisAsyncAnimationRendererBase.cpp
         KisAsyncAnimationCacheRenderer.cpp
         KisAsyncAnimationFramesSavingRenderer.cpp
         dialogs/KisAsyncAnimationRenderDialogBase.cpp
         dialogs/KisAsyncAnimationCacheRenderDialog.cpp
         dialogs/KisAsyncAnimationFramesSaveDialog.cpp
         canvas/kis_animation_player.cpp
         kis_animation_importer.cpp
         KisSyncedAudioPlayback.cpp
         KisFrameDataSerializer.cpp
         KisFrameCacheStore.cpp
         KisFrameCacheSwapper.cpp
         KisAbstractFrameCacheSwapper.cpp
         KisInMemoryFrameCacheSwapper.cpp
 
         input/wintab/drawpile_tablettester/tablettester.cpp
         input/wintab/drawpile_tablettester/tablettest.cpp
     )
 
 if (UNIX)
     set(kritaui_LIB_SRCS
         ${kritaui_LIB_SRCS}
         qtlockedfile/qtlockedfile_unix.cpp
         )
 endif()
 
 if(APPLE)
     set(kritaui_LIB_SRCS
         ${kritaui_LIB_SRCS}
         osx.mm
     )
 endif()
 
 ki18n_wrap_ui(kritaui_LIB_SRCS
     widgets/KoFillConfigWidget.ui
     widgets/KoStrokeConfigWidget.ui
     forms/wdgdlgpngimport.ui
     forms/wdgfullscreensettings.ui
     forms/wdgautogradient.ui
     forms/wdggeneralsettings.ui
     forms/wdgperformancesettings.ui
     forms/wdggenerators.ui
     forms/wdgbookmarkedconfigurationseditor.ui
     forms/wdgapplyprofile.ui
     forms/wdgcustompattern.ui
     forms/wdglayerproperties.ui
     forms/wdgcolorsettings.ui
     forms/wdgtabletsettings.ui
     forms/wdgcolorspaceselector.ui
     forms/wdgcolorspaceselectoradvanced.ui
     forms/wdgdisplaysettings.ui
     forms/kis_previewwidgetbase.ui
     forms/kis_matrix_widget.ui
     forms/wdgselectionoptions.ui
     forms/wdggeometryoptions.ui
     forms/wdgnewimage.ui
     forms/wdgimageproperties.ui
     forms/wdgmaskfromselection.ui
     forms/wdgmasksource.ui
     forms/wdgfilterdialog.ui
     forms/wdgmetadatamergestrategychooser.ui
     forms/wdgpaintoppresets.ui
     forms/wdgpaintopsettings.ui
     forms/wdgdlggeneratorlayer.ui
     forms/wdgdlgfilelayer.ui
     forms/wdgfilterselector.ui
     forms/wdgfilternodecreation.ui
     forms/wdgmultipliersdoublesliderspinbox.ui
     forms/wdgnodequerypatheditor.ui
     forms/wdgpresetselectorstrip.ui
     forms/wdgsavebrushpreset.ui
     forms/wdgpreseticonlibrary.ui
     forms/wdgdlgblacklistcleanup.ui
     forms/wdgrectangleconstraints.ui
     forms/wdgimportimagesequence.ui
     forms/wdgstrokeselectionproperties.ui
     forms/KisDetailsPaneBase.ui
     forms/KisOpenPaneBase.ui
     forms/wdgstopgradienteditor.ui
     forms/wdgsessionmanager.ui
     forms/wdgnewwindowlayout.ui
     forms/KisWelcomePage.ui
     forms/WdgDlgPaletteEditor.ui
     forms/KisNewsPage.ui
     forms/wdgGamutMaskToolbar.ui
 
     brushhud/kis_dlg_brush_hud_config.ui
     dialogs/kis_delayed_save_dialog.ui
     input/config/kis_input_configuration_page.ui
     input/config/kis_edit_profiles_dialog.ui
     input/config/kis_input_configuration_page_item.ui
     input/config/kis_mouse_input_editor.ui
     input/config/kis_wheel_input_editor.ui
     input/config/kis_key_input_editor.ui
 
     layerstyles/wdgBevelAndEmboss.ui
     layerstyles/wdgblendingoptions.ui
     layerstyles/WdgColorOverlay.ui
     layerstyles/wdgContour.ui
     layerstyles/wdgdropshadow.ui
     layerstyles/WdgGradientOverlay.ui
     layerstyles/wdgInnerGlow.ui
     layerstyles/wdglayerstyles.ui
     layerstyles/WdgPatternOverlay.ui
     layerstyles/WdgSatin.ui
     layerstyles/WdgStroke.ui
     layerstyles/wdgstylesselector.ui
     layerstyles/wdgTexture.ui
     layerstyles/wdgKisLayerStyleAngleSelector.ui
 
     wdgsplash.ui
     input/wintab/kis_screen_size_choice_dialog.ui
     input/wintab/drawpile_tablettester/tablettest.ui
 
 )
 
 if(WIN32)
     if(USE_QT_TABLET_WINDOWS)
         ki18n_wrap_ui(kritaui_LIB_SRCS
             dialogs/KisDlgCustomTabletResolution.ui
         )
     else()
         ki18n_wrap_ui(kritaui_LIB_SRCS
             input/wintab/kis_screen_size_choice_dialog.ui
         )
     endif()
 endif()
 
 
 add_library(kritaui SHARED ${kritaui_HEADERS_MOC} ${kritaui_LIB_SRCS} )
 generate_export_header(kritaui BASE_NAME kritaui)
 
 target_link_libraries(kritaui KF5::CoreAddons KF5::Completion KF5::I18n KF5::ItemViews Qt5::Network
                       kritaimpex kritacolor kritaimage kritalibbrush kritawidgets kritawidgetutils ${PNG_LIBRARIES} LibExiv2::LibExiv2
 )
 
 if (HAVE_QT_MULTIMEDIA)
     target_link_libraries(kritaui Qt5::Multimedia)
 endif()
 
 if (NOT WIN32 AND NOT APPLE)
   target_link_libraries(kritaui ${X11_X11_LIB}
                                 ${X11_Xinput_LIB}
                                 ${XCB_LIBRARIES})
 endif()
 
 if(APPLE)
     target_link_libraries(kritaui ${FOUNDATION_LIBRARY})
     target_link_libraries(kritaui ${APPKIT_LIBRARY})
 endif ()
 
 
 target_link_libraries(kritaui ${OPENEXR_LIBRARIES})
 
 # Add VSync disable workaround
 if(NOT WIN32 AND NOT APPLE)
     target_link_libraries(kritaui ${CMAKE_DL_LIBS} Qt5::X11Extras)
 endif()
 
 if(X11_FOUND)
     target_link_libraries(kritaui Qt5::X11Extras ${X11_LIBRARIES})
 endif()
 
 target_include_directories(kritaui
     PUBLIC
     $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/canvas>
     $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/flake>
     $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/ora>
     $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/tool>
     $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/utils>
     $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/widgets>
     $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/input/wintab>
 )
 
 set_target_properties(kritaui
     PROPERTIES VERSION ${GENERIC_KRITA_LIB_VERSION} SOVERSION ${GENERIC_KRITA_LIB_SOVERSION}
 )
 install(TARGETS kritaui  ${INSTALL_TARGETS_DEFAULT_ARGS})
 
 
 if (APPLE)
     install(FILES osx.stylesheet DESTINATION ${DATA_INSTALL_DIR}/krita)
 endif ()
diff --git a/libs/ui/kis_histogram_view.cc b/libs/ui/kis_histogram_view.cc
deleted file mode 100644
index 8cd3b0c712..0000000000
--- a/libs/ui/kis_histogram_view.cc
+++ /dev/null
@@ -1,239 +0,0 @@
-/*
- *  Copyright (c) 2005 Bart Coppens <kde@bartcoppens.be>
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation; either version 2 of the License, or
- *  (at your option) any later version.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to the Free Software
- *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- */
-
-#include "kis_histogram_view.h"
-
-#include <math.h>
-
-#include <QPainter>
-#include <QPixmap>
-#include <QLabel>
-#include <QComboBox>
-#include <QPushButton>
-#include <QScrollBar>
-#include <QMouseEvent>
-#include <QFrame>
-#include <QBrush>
-#include <QLinearGradient>
-#include <QImage>
-#include <QPaintEvent>
-
-#include <kis_debug.h>
-
-#include "KoChannelInfo.h"
-#include "KoBasicHistogramProducers.h"
-#include "KoColorSpace.h"
-
-#include "kis_global.h"
-#include "kis_layer.h"
-#include <kis_signal_compressor.h>
-#include "kis_paint_device.h"
-
-KisHistogramView::KisHistogramView(QWidget *parent, const char *name, Qt::WindowFlags f)
-        : QLabel(parent, f),
-          m_currentDev(nullptr), m_currentProducer(nullptr),
-          m_smoothHistogram(false),m_histogram_type(LINEAR)
-{
-    setObjectName(name);
-}
-
-KisHistogramView::~KisHistogramView()
-{
-}
-
-
-KoHistogramProducer *KisHistogramView::currentProducer()
-{
-    return m_currentProducer;
-}
-
-void KisHistogramView::startUpdateCanvasProjection()
-{
-    updateHistogramCalculation();
-}
-
-void KisHistogramView::setChannels(QList<KoChannelInfo*> & channels)
-{
-    m_channels = channels;
-    updateHistogramCalculation();
-}
-
-void KisHistogramView::setProducer(KoHistogramProducer* producer)
-{
-    m_currentProducer = producer;
-    m_channels = m_currentProducer->channels();
-    if( !m_histogram.isNull() ){
-        m_histogram->setProducer( m_currentProducer );
-    }
-    updateHistogramCalculation();
-}
-
-void KisHistogramView::setPaintDevice(KisPaintDeviceSP dev, KoHistogramProducer* producer, const QRect &bounds)
-{
-    m_currentProducer = producer;
-    m_channels = m_currentProducer->channels();
-    m_currentDev = dev;
-    m_currentBounds = bounds;
-    m_histogram = new KisHistogram(m_currentDev, m_currentBounds, m_currentProducer, m_histogram_type);
-
-    updateHistogramCalculation();
-}
-
-void KisHistogramView::setView(double from, double size)
-{
-    double m_from = from;
-    double m_width = size;
-    if (m_from + m_width > 1.0)
-        m_from = 1.0 - m_width;
-    m_histogram->producer()->setView(m_from, m_width);
-    updateHistogramCalculation();
-}
-
-bool KisHistogramView::hasColor()
-{
-    return m_color;
-}
-
-void KisHistogramView::setColor(bool set)
-{
-    if (set != m_color) {
-        m_color = set;
-    }
-    update();
-}
-
-void KisHistogramView::setHistogramType(enumHistogramType type)
-{
-    m_histogram_type = type;
-    updateHistogramCalculation();
-}
-
-void KisHistogramView::updateHistogramCalculation()
-{
-    if (!m_currentProducer || m_currentDev.isNull() || m_histogram.isNull() ) { // Something's very wrong: not initialized
-        return;
-    }
-    m_histogram->updateHistogram();
-    update();
-}
-
-void KisHistogramView::mousePressEvent(QMouseEvent * e)
-{
-    if (e->button() == Qt::RightButton)
-        emit rightClicked(e->globalPos());
-    else
-        QLabel::mousePressEvent(e);
-}
-
-void KisHistogramView::setSmoothHistogram(bool smoothHistogram)
-{
-    m_smoothHistogram = smoothHistogram;
-}
-
-
-void KisHistogramView::paintEvent(QPaintEvent *event)
-{
-    QLabel::paintEvent(event);
-
-    if( this->height() > 0 && this->width()>0 && !m_histogram.isNull() ){
-        qint32 height = this->height();
-        int selFrom, selTo; // from - to in bins
-
-        qint32 bins = m_histogram->producer()->numberOfBins();
-
-        QPainter painter(this);
-        painter.setPen(this->palette().light().color());
-
-        const int NGRID = 4;
-        for(int i=0; i<=NGRID; ++i){
-            painter.drawLine(this->width()*i/NGRID,0.,this->width()*i/NGRID,this->height());
-            painter.drawLine(0.,this->height()*i/NGRID,this->width(),this->height()*i/NGRID);
-        }
-
-
-        // Draw the box of the selection, if any
-        if (m_histogram->hasSelection()) {
-            double width = m_histogram->selectionTo() - m_histogram->selectionFrom();
-            double factor = static_cast<double>(bins) / m_histogram->producer()->viewWidth();
-            selFrom = static_cast<int>(m_histogram->selectionFrom() * factor);
-            selTo = selFrom + static_cast<int>(width * factor);
-            painter.drawRect(selFrom, 0, selTo - selFrom, height);
-        } else {
-            // We don't want the drawing to think we're in a selected area
-            selFrom = -1;
-            selTo = 2;
-        }
-
-        float highest = 0;
-
-        if(m_channels.count()==0){
-            m_channels=m_currentProducer->channels();
-        }
-        int nChannels = m_channels.size();
-
-        // First we iterate once, so that we have the overall maximum. This is a bit inefficient,
-        // but not too much since the histogram caches the calculations
-        for (int chan = 0; chan < m_channels.size(); chan++) {
-            if( m_channels.at(chan)->channelType() != KoChannelInfo::ALPHA ){
-                m_histogram->setChannel(chan);
-                if ((float)m_histogram->calculations().getHighest() > highest)
-                    highest = (float)m_histogram->calculations().getHighest();
-            }
-        }
-        highest = (m_histogram_type==LINEAR)? highest: std::log2(highest);
-
-        painter.setWindow(QRect(-1,0,bins+1,highest));
-        painter.setCompositionMode(QPainter::CompositionMode_Plus);
-
-        for (int chan = 0; chan < nChannels; chan++) {
-            if( m_channels.at(chan)->channelType() != KoChannelInfo::ALPHA ){
-                auto color = m_channels.at(chan)->color();
-                auto fill_color = color;
-                fill_color.setAlphaF(.25);
-                painter.setBrush(fill_color);
-                auto pen = QPen(color);
-                pen.setWidth(0);
-                painter.setPen(pen);
-
-                if (m_smoothHistogram){
-                    QPainterPath path;
-
-                    m_histogram->setChannel(chan);
-                    path.moveTo(QPointF(-1,highest));
-                    for (qint32 i = 0; i < bins; ++i) {
-                        float v = (m_histogram_type==LINEAR)? highest-m_histogram->getValue(i): highest-std::log2(m_histogram->getValue(i));
-                        path.lineTo(QPointF(i,v));
-
-                    }
-                    path.lineTo(QPointF(bins+1,highest));
-                    path.closeSubpath();
-                    painter.drawPath(path);
-                }
-                else {
-                    pen.setWidth(1);
-                    painter.setPen(pen);
-                    m_histogram->setChannel(chan);
-                    for (qint32 i = 0; i < bins; ++i) {
-                        float v = (m_histogram_type==LINEAR)? highest-m_histogram->getValue(i): highest-std::log2(m_histogram->getValue(i));
-                        painter.drawLine(QPointF(i,highest),QPointF(i,v));
-                    }
-                }
-            }
-        }
-    }
-}
diff --git a/libs/ui/kis_histogram_view.h b/libs/ui/kis_histogram_view.h
deleted file mode 100644
index 1c57c15c10..0000000000
--- a/libs/ui/kis_histogram_view.h
+++ /dev/null
@@ -1,106 +0,0 @@
-/*
- *  Copyright (c) 2005 Bart Coppens <kde@bartcoppens.be>
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation; either version 2 of the License, or
- *  (at your option) any later version.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to the Free Software
- *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- */
-
-#ifndef _KIS_HISTOGRAM_VIEW_
-#define _KIS_HISTOGRAM_VIEW_
-
-#include <QLabel>
-#include <QPixmap>
-#include <QVector>
-#include <QStringList>
-#include <QMouseEvent>
-#include <QSharedPointer>
-
-#include "kis_types.h"
-#include "kis_histogram.h"
-
-#include <kritaui_export.h>
-
-
-class KoChannelInfo;
-
-/**
- * This class displays a histogram. It has a list of channels it can
- * select. The easy way is to display channelStrings() to the user,
- * and then use a setActiveChannel with the integer the same as the
- * one the selected string in that stringlist has. If the selected one
- * is a producer, the histogram will automatically display all its
- * channels, and color them if that is possible.
- *
- * You can also set the channels manually, just don't forget that the
- * displayed channels all need to belong to the same producer! If you
- * set them manually, don't forget to set the (non)usage of color as
- * well.
- *
- * You can either set this to use a specific layer, or use a specific
- * histogram. With the latter, some functionality will disappear, like
- * listProducers(). Setting a histogram will discard info on the
- * layer, and setting a layer will discard info on the histogram.
- *
- **/
-class KRITAUI_EXPORT KisHistogramView : public QLabel
-{
-    Q_OBJECT
-
-public:
-
-    KisHistogramView(QWidget *parent = 0, const char *name = 0, Qt::WindowFlags f = 0);
-
-    ~KisHistogramView() override;
-
-    void setPaintDevice(KisPaintDeviceSP dev, KoHistogramProducer *producer, const QRect &bounds);
-
-    void setView(double from, double size);
-
-    KoHistogramProducer *currentProducer();
-
-    bool hasColor();
-    void setColor(bool set);
-    void setProducer(KoHistogramProducer* producer);
-    void setChannels(QList<KoChannelInfo*> & channels);
-    void paintEvent(QPaintEvent* event) override;
-    virtual void updateHistogramCalculation();
-    void setSmoothHistogram(bool smoothHistogram);
-
-public Q_SLOTS:
-    virtual void setHistogramType(enumHistogramType type);
-    virtual void startUpdateCanvasProjection();
-
-Q_SIGNALS:
-    void rightClicked(const QPoint& pos);
-
-protected:
-
-    void mousePressEvent(QMouseEvent * e) override;
-
-private:
-
-    void setChannels(void);
-
-    void addProducerChannels(KoHistogramProducer *producer);
-    KisHistogramSP m_histogram;
-    KisPaintDeviceSP m_currentDev;
-    QRect m_currentBounds;
-    KoHistogramProducer *m_currentProducer;
-    QList<KoChannelInfo *> m_channels;
-    bool m_color;
-    bool m_smoothHistogram;
-    enumHistogramType m_histogram_type;
-};
-
-#endif // _KIS_HISTOGRAM_VIEW_
diff --git a/plugins/extensions/CMakeLists.txt b/plugins/extensions/CMakeLists.txt
index 9ace76c315..65798e6f5f 100644
--- a/plugins/extensions/CMakeLists.txt
+++ b/plugins/extensions/CMakeLists.txt
@@ -1,20 +1,19 @@
 add_subdirectory( imagesplit )
 add_subdirectory( clonesarray )
 add_subdirectory( colorrange )
 add_subdirectory( colorspaceconversion )
-add_subdirectory( histogram )
 add_subdirectory( imagesize )
 add_subdirectory( metadataeditor )
 add_subdirectory( modify_selection )
 add_subdirectory( offsetimage )
 add_subdirectory( rotateimage )
 add_subdirectory( separate_channels )
 add_subdirectory( shearimage )
 add_subdirectory( layergroupswitcher )
 add_subdirectory( resourcemanager )
 add_subdirectory( layersplit )
 add_subdirectory( animationrenderer )
 add_subdirectory( waveletdecompose )
 add_subdirectory( pykrita )
 add_subdirectory( qmic )
 add_subdirectory( buginfo )
diff --git a/plugins/extensions/histogram/CMakeLists.txt b/plugins/extensions/histogram/CMakeLists.txt
deleted file mode 100644
index 9666edfd2d..0000000000
--- a/plugins/extensions/histogram/CMakeLists.txt
+++ /dev/null
@@ -1,6 +0,0 @@
-set(kritahistogram_SOURCES histogram.cc dlg_histogram.cc kis_histogram_widget.cc )
-ki18n_wrap_ui(kritahistogram_SOURCES wdghistogram.ui )
-add_library(kritahistogram MODULE ${kritahistogram_SOURCES})
-target_link_libraries(kritahistogram kritaui)
-install(TARGETS kritahistogram  DESTINATION ${KRITA_PLUGIN_INSTALL_DIR})
-install( FILES  histogram.xmlgui  DESTINATION ${DATA_INSTALL_DIR}/kritaplugins)
diff --git a/plugins/extensions/histogram/dlg_histogram.cc b/plugins/extensions/histogram/dlg_histogram.cc
deleted file mode 100644
index b78d5c64d0..0000000000
--- a/plugins/extensions/histogram/dlg_histogram.cc
+++ /dev/null
@@ -1,61 +0,0 @@
-/*
- *  dlg_histogram.cc - part of KimageShop^WKrayon^WKrita
- *
- *  Copyright (c) 2004 Boudewijn Rempt <boud@valdyas.org>
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation; either version 2 of the License, or
- *  (at your option) any later version.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to the Free Software
- *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- */
-
-#include "dlg_histogram.h"
-
-#include <klocalizedstring.h>
-#include <kis_debug.h>
-
-#include "kis_types.h"
-#include "kis_paint_device.h"
-#include "kis_histogram_widget.h"
-
-
-DlgHistogram::DlgHistogram(QWidget *  parent, const char * name)
-        : KoDialog(parent)
-{
-    setCaption(i18n("Histogram"));
-    setButtons(Ok | Cancel);
-    setDefaultButton(Ok);
-    setObjectName(name);
-    m_page = new KisHistogramWidget(this, "histogram");
-
-    Q_CHECK_PTR(m_page);
-
-    setCaption(i18n("Histogram"));
-    setMainWidget(m_page);
-    resize(m_page->sizeHint());
-}
-
-DlgHistogram::~DlgHistogram()
-{
-    delete m_page;
-}
-
-void DlgHistogram::setPaintDevice(KisPaintDeviceSP dev, const QRect &bounds)
-{
-    m_page->setPaintDevice(dev, bounds);
-}
-
-void DlgHistogram::okClicked()
-{
-    accept();
-}
-
diff --git a/plugins/extensions/histogram/dlg_histogram.h b/plugins/extensions/histogram/dlg_histogram.h
deleted file mode 100644
index 9ac59133e7..0000000000
--- a/plugins/extensions/histogram/dlg_histogram.h
+++ /dev/null
@@ -1,55 +0,0 @@
-/*
- *  dlg_histogram.h -- part of KimageShop^WKrayon^WKrita
- *
- *  Copyright (c) 2004 Boudewijn Rempt <boud@valdyas.org>
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation; either version 2 of the License, or
- *  (at your option) any later version.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to the Free Software
- *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- */
-#ifndef DLG_HISTOGRAM
-#define DLG_HISTOGRAM
-
-#include <KoDialog.h>
-
-#include "kis_types.h"
-
-class KisHistogramWidget;
-
-/**
- * This dialog shows the histogram for the (selected) portion
- * of the current layer.
- *
- * XXX: Also for complete image?
- */
-class DlgHistogram: public KoDialog
-{
-    Q_OBJECT
-
-public:
-
-    DlgHistogram(QWidget * parent = 0,
-                 const char* name = 0);
-    ~DlgHistogram() override;
-
-    void setPaintDevice(KisPaintDeviceSP dev, const QRect &bounds);
-
-private Q_SLOTS:
-    void okClicked();
-
-private:
-
-    KisHistogramWidget * m_page;
-};
-
-#endif // DLG_HISTOGRAM
diff --git a/plugins/extensions/histogram/histogram.cc b/plugins/extensions/histogram/histogram.cc
deleted file mode 100644
index 2a6036ae84..0000000000
--- a/plugins/extensions/histogram/histogram.cc
+++ /dev/null
@@ -1,70 +0,0 @@
-/*
- * histogram.h -- Part of Krita
- *
- * Copyright (c) 2004 Boudewijn Rempt (boud@valdyas.org)
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation; either version 2 of the License, or
- *  (at your option) any later version.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to the Free Software
- *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- */
-
-#include "histogram.h"
-
-#include <klocalizedstring.h>
-#include <kis_debug.h>
-#include <kpluginfactory.h>
-
-#include <kis_layer.h>
-#include <kis_paint_device.h>
-#include <kis_image.h>
-#include <KisViewManager.h>
-
-#include "dlg_histogram.h"
-#include "kis_node_manager.h"
-#include <kis_action.h>
-
-K_PLUGIN_FACTORY_WITH_JSON(HistogramFactory, "kritahistogram.json", registerPlugin<Histogram>();)
-
-Histogram::Histogram(QObject *parent, const QVariantList &)
-        : KisActionPlugin(parent)
-{
-    KisAction* action  = createAction("histogram");
-    connect(action,  SIGNAL(triggered()), this, SLOT(slotActivated()));
-}
-
-Histogram::~Histogram()
-{
-}
-
-void Histogram::slotActivated()
-{
-    DlgHistogram * dlgHistogram = new DlgHistogram(viewManager()->mainWindow(), "Histogram");
-
-    Q_CHECK_PTR(dlgHistogram);
-
-    KisLayerSP layer = viewManager()->nodeManager()->activeLayer();
-    if (layer) {
-        KisPaintDeviceSP dev = layer->paintDevice();
-
-        if (dev) {
-            dlgHistogram->setPaintDevice(dev, layer->image()->bounds());
-        }
-        if (dlgHistogram->exec() == QDialog::Accepted) {
-            // Do nothing; this is an informational dialog
-        }
-    }
-    delete dlgHistogram;
-}
-
-#include "histogram.moc"
-
diff --git a/plugins/extensions/histogram/histogram.h b/plugins/extensions/histogram/histogram.h
deleted file mode 100644
index cfe286ffc3..0000000000
--- a/plugins/extensions/histogram/histogram.h
+++ /dev/null
@@ -1,39 +0,0 @@
-/*
- * histogram.h -- Part of Krita
- *
- * Copyright (c) 2004 Boudewijn Rempt (boud@valdyas.org)
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation; either version 2 of the License, or
- *  (at your option) any later version.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to the Free Software
- *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- */
-
-#ifndef HISTOGRAM_H
-#define HISTOGRAM_H
-
-#include <QVariant>
-
-#include <KisActionPlugin.h>
-
-class Histogram : public KisActionPlugin
-{
-    Q_OBJECT
-public:
-    Histogram(QObject *parent, const QVariantList &);
-    ~Histogram() override;
-
-private Q_SLOTS:
-    void slotActivated();
-};
-
-#endif // HISTOGRAM_H
diff --git a/plugins/extensions/histogram/histogram.xmlgui b/plugins/extensions/histogram/histogram.xmlgui
deleted file mode 100644
index 9a009a73a0..0000000000
--- a/plugins/extensions/histogram/histogram.xmlgui
+++ /dev/null
@@ -1,8 +0,0 @@
-<!DOCTYPE kpartgui SYSTEM "kpartgui.dtd">
-<kpartgui library="kritahistogram" version="6" translationDomain="krita">
-<MenuBar>
-    <Menu name="Layer"><text>&amp;Layer</text>
-	<Action name="histogram" group="layer_properties_merge"/>
-    </Menu>
-</MenuBar>
-</kpartgui>
diff --git a/plugins/extensions/histogram/kis_histogram_widget.cc b/plugins/extensions/histogram/kis_histogram_widget.cc
deleted file mode 100644
index 393b5b2b5d..0000000000
--- a/plugins/extensions/histogram/kis_histogram_widget.cc
+++ /dev/null
@@ -1,268 +0,0 @@
-/*
- *  Copyright (c) 2004 Boudewijn Rempt
- *            (c) 2005 Bart Coppens <kde@bartcoppens.be>
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation; either version 2 of the License, or
- *  (at your option) any later version.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to the Free Software
- *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- */
-
-#include "kis_histogram_widget.h"
-
-#include <QPainter>
-#include <QLabel>
-#include <QComboBox>
-#include <QPushButton>
-#include <QScrollBar>
-
-#include <kis_debug.h>
-
-#include "KoChannelInfo.h"
-#include "KoBasicHistogramProducers.h"
-#include "kis_histogram_view.h"
-
-#include "kis_histogram.h"
-#include "kis_global.h"
-#include "kis_types.h"
-#include "kis_layer.h"
-#include "kis_paint_device.h"
-
-
-KisHistogramWidget::KisHistogramWidget(QWidget *parent, const char *name)
-        : WdgHistogram(parent)
-{
-    setObjectName(name);
-    m_from = 0.0;
-    m_width = 0.0;
-}
-
-KisHistogramWidget::~KisHistogramWidget()
-{
-}
-
-QList<QString> KisHistogramWidget::producers()
-{
-    if (m_cs)
-        return KoHistogramProducerFactoryRegistry::instance()->keysCompatibleWith(m_cs,true);
-    return QList<QString>();
-}
-
-
-void KisHistogramWidget::setChannels(void)
-{
-    m_comboInfo.clear();
-    m_channelStrings.clear();
-    m_channels.clear();
-    m_channelToOffset.clear();
-
-    QList<QString> list = KoHistogramProducerFactoryRegistry::instance()->keysCompatibleWith(m_cs,false);
-
-    if (list.count() == 0) {
-        // XXX: No native histogram for this colorspace. Using converted RGB. We should have a warning
-        KoGenericRGBHistogramProducerFactory f;
-        addProducerChannels(f.generate());
-    } else {
-        Q_FOREACH (const QString &id, list) {
-            KoHistogramProducer *producer = KoHistogramProducerFactoryRegistry::instance()->value(id)->generate();
-            if (producer) {
-                addProducerChannels(producer);
-            }
-        }
-    }
-
-    m_currentProducer = m_comboInfo.at(0).producer;
-    m_color = false;
-    // The currently displayed channel and its offset
-    m_channels.append(m_comboInfo.at(1).channel);
-    m_channelToOffset.append(0);
-}
-
-void KisHistogramWidget::setCurrentChannels(const KoID& producerID, QList<KoChannelInfo *> channels)
-{
-    setCurrentChannels(
-        KoHistogramProducerFactoryRegistry::instance()->value(producerID.id())->generate(),
-        channels);
-}
-
-void KisHistogramWidget::setCurrentChannels(KoHistogramProducer *producer, QList<KoChannelInfo *> channels)
-{
-    m_currentProducer = producer;
-    m_currentProducer->setView(m_from, m_width);
-    m_histogramView->setProducer(m_currentProducer);
-    //m_histogram->setChannel(0); // Set a default channel, just being nice
-
-    m_channels.clear();
-    m_channelToOffset.clear();
-
-    if (channels.count() == 0) {
-        return;
-    }
-
-    QList<KoChannelInfo *> producerChannels = m_currentProducer->channels();
-
-    for (int i = 0; i < channels.count(); i++) {
-        // Also makes sure the channel is actually in the producer's list
-        for (int j = 0; j < producerChannels.count(); j++) {
-            if (channels.at(i)->name() == producerChannels.at(j)->name()) {
-                m_channelToOffset.append(m_channels.count()); // The first we append maps to 0
-                m_channels.append(channels.at(i));
-            }
-        }
-    }
-    m_histogramView->setChannels(m_channels);
-}
-
-void KisHistogramWidget::addProducerChannels(KoHistogramProducer *producer)
-{
-    if (!producer) return;
-
-    ComboboxInfo info;
-    info.isProducer = true;
-    info.producer = producer;
-    m_comboInfo.append(info);
-    m_channelStrings.append(producer->id().name());
-}
-
-void KisHistogramWidget::setActiveChannel(int channel)
-{
-    ComboboxInfo info = m_comboInfo.at(channel);
-    if (info.producer != m_currentProducer) {
-        m_currentProducer = info.producer;
-        m_currentProducer->setView(m_from, m_width);
-        m_histogramView->setProducer(m_currentProducer);
-    }
-
-    m_channels.clear();
-    m_channelToOffset.clear();
-
-    if (info.isProducer) {
-        m_color = true;
-        m_channels = m_currentProducer->channels();
-        for (int i = 0; i < m_channels.count(); i++)
-            m_channelToOffset.append(i);
-        //setChannel(0); // Set a default channel, just being nice
-    } else {
-        m_color = false;
-        QList<KoChannelInfo *> channels = m_currentProducer->channels();
-        for (int i = 0; i < channels.count(); i++) {
-            KoChannelInfo* channel = channels.at(i);
-            if (channel->name() == info.channel->name()) {
-                m_channels.append(channel);
-                m_channelToOffset.append(i);
-                break;
-            }
-        }
-    }
-    updateEnabled();
-}
-
-QStringList KisHistogramWidget::channelStrings()
-{
-    return m_channelStrings;
-}
-
-void KisHistogramWidget::setPaintDevice(KisPaintDeviceSP dev, const QRect &bounds)
-{
-    radioLinear->disconnect(this);
-    radioLog->disconnect(this);
-    cmbChannel->disconnect(this);
-
-    m_cs = dev->colorSpace();
-
-    setChannels(); // Sets m_currentProducer to the first in the list
-    m_histogramView->setPaintDevice(dev, m_currentProducer, bounds);
-    setActiveChannel(0); // So we have the colored one if there are colors
-
-    // The channels
-    cmbChannel->clear();
-    cmbChannel->addItems(this->channelStrings());
-    cmbChannel->setCurrentIndex(0);
-
-    // View display
-    currentView->setMinimum(0);
-    currentView->setMaximum(100);
-
-    updateEnabled();
-
-    m_from = m_histogramView->currentProducer()->viewFrom();
-    m_width = m_histogramView->currentProducer()->viewWidth();
-
-    connect(radioLinear,SIGNAL(clicked()), this, SLOT(slotTypeSwitched()));
-    connect(radioLog,SIGNAL(clicked()), this, SLOT(slotTypeSwitched()));
-    connect(cmbChannel, SIGNAL(activated(int)), this, SLOT(setActiveChannel(int)));
-    connect(zoomIn, SIGNAL(clicked()), this, SLOT(slotZoomIn()));
-    connect(zoomOut, SIGNAL(clicked()), this, SLOT(slotZoomOut()));
-    connect(currentView, SIGNAL(valueChanged(int)), this, SLOT(slide(int)));
-}
-
-
-void KisHistogramWidget::slotTypeSwitched(void)
-{
-    m_histogramView->setHistogramType( radioLinear->isChecked()?LINEAR:LOGARITHMIC );
-}
-
-void KisHistogramWidget::setView(double from, double size)
-{
-    m_from = from;
-    m_width = size;
-    if (m_from + m_width > 1.0)
-        m_from = 1.0 - m_width;
-    m_histogramView->setView(m_from, m_width);
-    updateEnabled();
-}
-
-void KisHistogramWidget::slotZoomIn()
-{
-    if ((m_width / 2) >= m_histogramView->currentProducer()->maximalZoom()) {
-        setView(m_from, m_width / 2);
-    }
-}
-
-void KisHistogramWidget::slotZoomOut()
-{
-    if (m_width * 2 <= 1.0) {
-        setView(m_from, m_width * 2);
-    }
-}
-
-void KisHistogramWidget::slide(int val)
-{
-    // Beware: at the END (e.g. 100), we want to still view m_width:
-    setView((static_cast<double>(val) / 100.0) *(1.0 - m_width), m_width);
-}
-
-void KisHistogramWidget::updateEnabled()
-{
-    if (m_histogramView->currentProducer()->maximalZoom() < 1.0) {
-        if ((m_width / 2) >= m_histogramView->currentProducer()->maximalZoom()) {
-            zoomIn->setEnabled(true);
-        } else {
-            zoomIn->setEnabled(false);
-        }
-        if (m_width * 2 <= 1.0) {
-            zoomOut->setEnabled(true);
-        } else {
-            zoomOut->setEnabled(false);
-        }
-        if (m_width < 1.0)
-            currentView->setEnabled(true);
-        else
-            currentView->setEnabled(false);
-    } else {
-        zoomIn->setEnabled(false);
-        zoomOut->setEnabled(false);
-        currentView->setEnabled(false);
-    }
-}
-
-
diff --git a/plugins/extensions/histogram/kis_histogram_widget.h b/plugins/extensions/histogram/kis_histogram_widget.h
deleted file mode 100644
index 6cb9f4faf7..0000000000
--- a/plugins/extensions/histogram/kis_histogram_widget.h
+++ /dev/null
@@ -1,92 +0,0 @@
-/*
- *  Copyright (c) 2004 Boudewijn Rempt <boud@valdyas.org>
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation; either version 2 of the License, or
- *  (at your option) any later version.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to the Free Software
- *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- */
-#ifndef KIS_HISTOGRAM_WIDGET_
-#define KIS_HISTOGRAM_WIDGET_
-
-#include "kis_types.h"
-#include "ui_wdghistogram.h"
-#include "KoHistogramProducer.h"
-
-class WdgHistogram : public QWidget, public Ui::WdgHistogram
-{
-    Q_OBJECT
-
-public:
-    WdgHistogram(QWidget *parent) : QWidget(parent) {
-        setupUi(this);
-    }
-};
-
-/**
- * The histogram widget takes a paint device or an image and
- * draws a histogram for the given KisHistogram.
- */
-class KisHistogramWidget : public WdgHistogram
-{
-
-    Q_OBJECT
-
-public:
-    KisHistogramWidget(QWidget *parent, const char *name);
-    ~KisHistogramWidget() override;
-
-    void setPaintDevice(KisPaintDeviceSP dev, const QRect &bounds);
-
-    /** Sets the currently displayed channels to channels of the producer with producerID as ID*/
-    void setCurrentChannels(const KoID& producerID, QList<KoChannelInfo *> channels);
-
-    /** Be careful, producer will be modified */
-    void setCurrentChannels(KoHistogramProducer *producer, QList<KoChannelInfo *> channels);
-
-private Q_SLOTS:
-    void setActiveChannel(int channel);
-    void slotTypeSwitched(void);
-    void slotZoomIn();
-    void slotZoomOut();
-    void slide(int val);
-
-private:
-    void setChannels(void);
-    void addProducerChannels(KoHistogramProducer *producer);
-
-    typedef struct {
-        bool isProducer;
-        KoHistogramProducer *producer;
-        KoChannelInfo * channel;
-    } ComboboxInfo;
-
-    QVector<ComboboxInfo> m_comboInfo;
-    // Maps the channels in m_channels to a real channel offset in the producer->channels()
-    QVector<qint32> m_channelToOffset;
-    QStringList m_channelStrings;
-    QList<KoChannelInfo *> m_channels;
-    const KoColorSpace* m_cs;
-
-    QStringList channelStrings();
-    /** Lists all producers currently available */
-    QList<QString> producers();
-
-    void setView(double from, double size);
-    void updateEnabled();
-    double m_from, m_width;
-    KoHistogramProducer* m_currentProducer;
-    bool m_color;
-};
-
-
-#endif // KIS_HISTOGRAM_WIDGET_
diff --git a/plugins/extensions/histogram/kritahistogram.json b/plugins/extensions/histogram/kritahistogram.json
deleted file mode 100644
index 45e40e5cd8..0000000000
--- a/plugins/extensions/histogram/kritahistogram.json
+++ /dev/null
@@ -1,9 +0,0 @@
-{
-    "Id": "Histogram Plugin",
-    "Type": "Service",
-    "X-KDE-Library": "kritahistogram",
-    "X-KDE-ServiceTypes": [
-        "Krita/ViewPlugin"
-    ],
-    "X-Krita-Version": "28"
-}
diff --git a/plugins/extensions/histogram/wdghistogram.ui b/plugins/extensions/histogram/wdghistogram.ui
deleted file mode 100644
index 8f42d66375..0000000000
--- a/plugins/extensions/histogram/wdghistogram.ui
+++ /dev/null
@@ -1,179 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<ui version="4.0">
- <class>WdgHistogram</class>
- <widget class="QWidget" name="WdgHistogram">
-  <property name="geometry">
-   <rect>
-    <x>0</x>
-    <y>0</y>
-    <width>450</width>
-    <height>380</height>
-   </rect>
-  </property>
-  <layout class="QVBoxLayout">
-   <item>
-    <widget class="QGroupBox" name="grpType">
-     <property name="title">
-      <string>Histogram Options</string>
-     </property>
-     <layout class="QGridLayout" name="gridLayout_2">
-      <item row="0" column="0">
-       <layout class="QGridLayout" name="gridLayout">
-        <item row="0" column="0">
-         <widget class="QLabel" name="lblChannel">
-          <property name="text">
-           <string>&amp;Channel:</string>
-          </property>
-          <property name="buddy">
-           <cstring>cmbChannel</cstring>
-          </property>
-         </widget>
-        </item>
-        <item row="0" column="1">
-         <widget class="QComboBox" name="cmbChannel">
-          <property name="sizePolicy">
-           <sizepolicy hsizetype="Expanding" vsizetype="Fixed">
-            <horstretch>0</horstretch>
-            <verstretch>0</verstretch>
-           </sizepolicy>
-          </property>
-         </widget>
-        </item>
-        <item row="0" column="2">
-         <widget class="QRadioButton" name="radioLinear">
-          <property name="text">
-           <string>&amp;Linear</string>
-          </property>
-          <property name="checked">
-           <bool>true</bool>
-          </property>
-         </widget>
-        </item>
-        <item row="1" column="0">
-         <spacer name="spacer2">
-          <property name="orientation">
-           <enum>Qt::Vertical</enum>
-          </property>
-          <property name="sizeType">
-           <enum>QSizePolicy::Preferred</enum>
-          </property>
-          <property name="sizeHint" stdset="0">
-           <size>
-            <width>20</width>
-            <height>21</height>
-           </size>
-          </property>
-         </spacer>
-        </item>
-        <item row="1" column="1">
-         <spacer name="spacer1">
-          <property name="orientation">
-           <enum>Qt::Vertical</enum>
-          </property>
-          <property name="sizeType">
-           <enum>QSizePolicy::Preferred</enum>
-          </property>
-          <property name="sizeHint" stdset="0">
-           <size>
-            <width>20</width>
-            <height>20</height>
-           </size>
-          </property>
-         </spacer>
-        </item>
-        <item row="1" column="2">
-         <widget class="QRadioButton" name="radioLog">
-          <property name="text">
-           <string>&amp;Logarithmic</string>
-          </property>
-         </widget>
-        </item>
-       </layout>
-      </item>
-     </layout>
-    </widget>
-   </item>
-   <item>
-    <widget class="KisHistogramView" name="m_histogramView">
-     <property name="sizePolicy">
-      <sizepolicy hsizetype="Expanding" vsizetype="Expanding">
-       <horstretch>0</horstretch>
-       <verstretch>0</verstretch>
-      </sizepolicy>
-     </property>
-     <property name="minimumSize">
-      <size>
-       <width>256</width>
-       <height>150</height>
-      </size>
-     </property>
-    </widget>
-   </item>
-   <item>
-    <layout class="QHBoxLayout">
-     <property name="margin">
-      <number>0</number>
-     </property>
-     <item>
-      <widget class="QLabel" name="textLabel1">
-       <property name="text">
-        <string>View:</string>
-       </property>
-       <property name="alignment">
-        <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
-       </property>
-      </widget>
-     </item>
-     <item>
-      <widget class="QPushButton" name="zoomIn">
-       <property name="sizePolicy">
-        <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
-         <horstretch>0</horstretch>
-         <verstretch>0</verstretch>
-        </sizepolicy>
-       </property>
-       <property name="text">
-        <string>+</string>
-       </property>
-      </widget>
-     </item>
-     <item>
-      <widget class="QPushButton" name="zoomOut">
-       <property name="sizePolicy">
-        <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
-         <horstretch>0</horstretch>
-         <verstretch>0</verstretch>
-        </sizepolicy>
-       </property>
-       <property name="text">
-        <string>-</string>
-       </property>
-      </widget>
-     </item>
-     <item>
-      <widget class="QScrollBar" name="currentView">
-       <property name="sizePolicy">
-        <sizepolicy hsizetype="Expanding" vsizetype="Fixed">
-         <horstretch>0</horstretch>
-         <verstretch>0</verstretch>
-        </sizepolicy>
-       </property>
-       <property name="orientation">
-        <enum>Qt::Horizontal</enum>
-       </property>
-      </widget>
-     </item>
-    </layout>
-   </item>
-  </layout>
- </widget>
- <customwidgets>
-  <customwidget>
-   <class>KisHistogramView</class>
-   <extends></extends>
-   <header>kis_histogram_view.h</header>
-  </customwidget>
- </customwidgets>
- <resources/>
- <connections/>
-</ui>