refactor: cut engine-to-UI include violations ahead of the liboakengine split

- slider DisplayType enums sink to node/sliderdisplaytype.h (canonical
  engine home); FloatSlider/RationalSlider alias them for compatibility
- DropWithoutSequenceBehavior enum sinks to common/dropworkflowbehavior.h
- Config errors now go through a registered ErrorHandler hook instead of
  QMessageBox with a MainWindow parent; the style default no longer
  depends on the UI style manager
- MainWindowLayoutInfo moves to node/project/serializer/ and its panel
  dependency is reduced to a plain std::map alias (PanelLayoutInfo),
  breaking the engine -> PanelWidget -> KDDockWidgets chain
- ProjectImportErrorDialog moves from task/ to dialog/projectimport/
- remove confirmed-redundant UI includes and give project.h/import.h/
  project.cpp the direct includes they were borrowing transitively
- project.h includes folder/sequence headers directly (it used both
  types in its own API all along)

app/audio/audiomanager.cpp

@@ -25,7 +25,6 @@
 #include <pa_jack.h>
 #endif
 
-#include <QApplication>
 
 #include "config/config.h"
 

app/codec/oiio/oiiodecoder.cpp

@@ -24,7 +24,6 @@
 #include <QDebug>
 #include <QDir>
 #include <QFileInfo>
-#include <QMessageBox>
 
 #include "common/oiioutils.h"
 #include "render/renderer.h"

app/common/crashpadinterface.cpp

@@ -27,7 +27,6 @@
 #include <QDateTime>
 #include <QDebug>
 #include <QDir>
-#include <QMessageBox>
 #include <QProcess>
 
 #include "crashpadutils.h"

app/common/dropworkflowbehavior.h

@@ -0,0 +1,43 @@
+/***
+
+  Oak - Non-Linear Video Editor
+  Copyright (C) 2026 Oak Team
+
+  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 3 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, see <http://www.gnu.org/licenses/>.
+
+***/
+
+#ifndef OAK_DROPWORKFLOWBEHAVIOR_H
+#define OAK_DROPWORKFLOWBEHAVIOR_H
+
+namespace olive
+{
+
+/**
+ * @brief Behavior when media is dropped onto a timeline without a sequence
+ *
+ * Shared by the config defaults (engine layer) and the timeline import
+ * tool (UI layer). Enumerator order matches the previous
+ * ImportTool::DropWithoutSequenceBehavior.
+ */
+enum DropWithoutSequenceBehavior {
+	k_dws_ask,
+	k_dws_auto,
+	k_dws_manual,
+	k_dws_disable
+};
+
+}
+
+#endif // OAK_DROPWORKFLOWBEHAVIOR_H

app/config/config.cpp

@@ -24,26 +24,39 @@
 #include <QCoreApplication>
 #include <QDebug>
 #include <QDir>
-#include <QMessageBox>
 #include <QStandardPaths>
 #include <QXmlStreamWriter>
 
 #include "codec/exportformat.h"
 #include "common/autoscroll.h"
+#include "common/dropworkflowbehavior.h"
 #include "common/filefunctions.h"
 #include "common/xmlutils.h"
 #include "core.h"
 #include "timeline/timelinecommon.h"
 #include "ui/colorcoding.h"
-#include "ui/style/style.h"
-#include "widget/timelinewidget/tool/import.h"
-#include "window/mainwindow/mainwindow.h"
 
 namespace olive
 {
 
 Config Config::current_config;
 
+Config::ErrorHandler Config::error_handler_ = nullptr;
+
+void Config::set_error_handler(ErrorHandler handler)
+{
+	error_handler_ = handler;
+}
+
+void Config::report_error(const QString &title, const QString &message)
+{
+	if (error_handler_) {
+		error_handler_(title, message);
+	} else {
+		qWarning() << title << "-" << message;
+	}
+}
+
 Config::Config()
 {
 	set_defaults();
@@ -69,8 +82,10 @@ Config &Config::current()
 void Config::set_defaults()
 {
 	config_map_.clear();
+	// Default style name; the style itself lives in the UI layer
+	// (ui/style), which owns the definitive list
 	set_entry_internal(QStringLiteral("Style"), NodeValue::k_text,
-					 StyleManager::k_default_style);
+					 QStringLiteral("olive-dark"));
 	set_entry_internal(QStringLiteral("TimecodeDisplay"), NodeValue::k_int,
 					 Timecode::k_timecode_drop_frame);
 	set_entry_internal(QStringLiteral("DefaultStillLength"), NodeValue::k_rational,
@@ -124,7 +139,7 @@ void Config::set_defaults()
 	set_entry_internal(QStringLiteral("RectifiedWaveforms"), NodeValue::k_boolean,
 					 true);
 	set_entry_internal(QStringLiteral("DropWithoutSequenceBehavior"),
-					 NodeValue::k_int, ImportTool::k_dws_ask);
+					 NodeValue::k_int, k_dws_ask);
 	set_entry_internal(QStringLiteral("Loop"), NodeValue::k_boolean, false);
 	set_entry_internal(QStringLiteral("SplitClipsCopyNodes"), NodeValue::k_boolean,
 					 true);
@@ -356,20 +371,13 @@ void Config::load()
 	}
 
 	if (reader.hasError()) {
-		// Config::Load() is called before Core (and therefore the main window)
-		// is constructed, so we cannot use Core::instance()->main_window() as
-		// the message box parent. Passing nullptr creates a top-level dialog.
-		QWidget *parent = Core::instance() ? Core::instance()->main_window() :
-											 nullptr;
-		QMessageBox::critical(
-			parent,
+		report_error(
 			QCoreApplication::translate("Config", "Error loading settings"),
 			QCoreApplication::translate(
 				"Config",
 				"Failed to load application settings. This session will "
 				"use defaults.\n\n%1")
-				.arg(reader.errorString()),
-			QMessageBox::Ok);
+				.arg(reader.errorString()));
 		current_config.set_defaults();
 	}
 
@@ -385,14 +393,12 @@ void Config::save()
 	QFile config_file(temp_filename);
 
 	if (!config_file.open(QFile::WriteOnly)) {
-		QMessageBox::critical(
-			Core::instance()->main_window(),
+		report_error(
 			QCoreApplication::translate("Config", "Error saving settings"),
 			QCoreApplication::translate(
 				"Config",
 				"Failed to save application settings. The application "
-				"may lack write permissions for this location."),
-			QMessageBox::Ok);
+				"may lack write permissions for this location."));
 		return;
 	}
 

app/config/config.h

@@ -44,6 +44,18 @@ public:
 
 	static void save();
 
+	/**
+	 * @brief Handler for configuration errors that should be shown to the user
+	 *
+	 * The engine layer cannot show dialogs itself. The UI registers a
+	 * handler (e.g. QMessageBox-based) at startup; without one, errors go
+	 * to the log instead.
+	 */
+	using ErrorHandler = void (*)(const QString &title,
+								  const QString &message);
+
+	static void set_error_handler(ErrorHandler handler);
+
 	QVariant operator[](const QString &) const;
 
 	QVariant &operator[](const QString &);
@@ -65,6 +77,10 @@ private:
 
 	static Config current_config;
 
+	static ErrorHandler error_handler_;
+
+	static void report_error(const QString &title, const QString &message);
+
 	static QString get_config_file_path();
 };
 

app/core.cpp

@@ -71,7 +71,7 @@
 #include "task/project/saveotio/saveotio.h"
 #endif
 #include "task/project/import/import.h"
-#include "task/project/import/importerrordialog.h"
+#include "dialog/projectimport/projectimporterrordialog.h"
 #include "task/project/load/load.h"
 #include "task/project/save/save.h"
 #include "task/taskmanager.h"

app/core.h

@@ -34,7 +34,6 @@
 #include "task/task.h"
 #include "tool/tool.h"
 #include "undo/undostack.h"
-#include "widget/projectexplorer/projectviewmodel.h"
 
 namespace olive
 {

app/dialog/CMakeLists.txt

@@ -30,6 +30,7 @@ if (OpenTimelineIO_FOUND)
 endif ()
 add_subdirectory(preferences)
 add_subdirectory(progress)
+add_subdirectory(projectimport)
 add_subdirectory(proxy)
 add_subdirectory(projectproperties)
 add_subdirectory(rendercancel)

app/dialog/export/codec/imagesection.cpp

@@ -49,7 +49,7 @@ ImageSection::ImageSection(QWidget *parent)
 	frame_slider_ = new RationalSlider();
 	frame_slider_->set_minimum(0);
 	frame_slider_->set_value(0);
-	frame_slider_->set_display_type(RationalSlider::k_time);
+	frame_slider_->set_display_type(slider::k_time);
 	connect(frame_slider_, &RationalSlider::value_changed, this,
 			&ImageSection::time_changed);
 	layout->addWidget(frame_slider_, row, 1);

app/dialog/keyframeproperties/keyframeproperties.cpp

@@ -47,7 +47,7 @@ KeyframePropertiesDialog::KeyframePropertiesDialog(
 	layout->addWidget(new QLabel("Time:"), row, 0);
 
 	time_slider_ = new RationalSlider();
-	time_slider_->set_display_type(RationalSlider::k_time);
+	time_slider_->set_display_type(slider::k_time);
 	time_slider_->set_timebase(timebase_);
 	layout->addWidget(time_slider_, row, 1);
 

app/dialog/markerproperties/markerpropertiesdialog.cpp

@@ -65,10 +65,10 @@ MarkerPropertiesDialog::MarkerPropertiesDialog(
 
 	if (markers.size() == 1) {
 		in_slider_->set_value(markers.front()->time().in());
-		in_slider_->set_display_type(RationalSlider::k_time);
+		in_slider_->set_display_type(slider::k_time);
 		in_slider_->set_timebase(timebase);
 		out_slider_->set_value(markers.front()->time().out());
-		out_slider_->set_display_type(RationalSlider::k_time);
+		out_slider_->set_display_type(slider::k_time);
 		out_slider_->set_timebase(timebase);
 	} else {
 		// Markers cannot be on the same time, so we disable setting time if multiple markers are selected

app/dialog/projectimport/CMakeLists.txt

@@ -0,0 +1,23 @@
+# Olive - Non-Linear Video Editor
+# Copyright (C) 2022 Olive Team
+# Modifications Copyright (C) 2026 Oak Team
+#
+# 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 3 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, see <http://www.gnu.org/licenses/>.
+
+set(OLIVE_SOURCES
+        ${OLIVE_SOURCES}
+        dialog/projectimport/projectimporterrordialog.cpp
+        dialog/projectimport/projectimporterrordialog.h
+        PARENT_SCOPE
+)

app/dialog/projectimport/projectimporterrordialog.cpp

@@ -19,7 +19,7 @@
 
 ***/
 
-#include "importerrordialog.h"
+#include "projectimporterrordialog.h"
 
 #include <QDialogButtonBox>
 #include <QLabel>

app/dialog/speedduration/speeddurationdialog.cpp

@@ -57,7 +57,7 @@ SpeedDurationDialog::SpeedDurationDialog(const QVector<ClipBlock *> &clips,
 		speed_layout->addWidget(new QLabel(tr("Speed:")), row, 0);
 
 		speed_slider_ = new FloatSlider();
-		speed_slider_->set_display_type(FloatSlider::k_percentage);
+		speed_slider_->set_display_type(slider::k_percentage);
 		connect(speed_slider_, &FloatSlider::value_changed, this,
 				&SpeedDurationDialog::speed_changed);
 		speed_layout->addWidget(speed_slider_, row, 1);
@@ -68,7 +68,7 @@ SpeedDurationDialog::SpeedDurationDialog(const QVector<ClipBlock *> &clips,
 
 		dur_slider_ = new RationalSlider();
 		dur_slider_->set_timebase(timebase);
-		dur_slider_->set_display_type(RationalSlider::k_time);
+		dur_slider_->set_display_type(slider::k_time);
 		connect(dur_slider_, &RationalSlider::value_changed, this,
 				&SpeedDurationDialog::duration_changed);
 		speed_layout->addWidget(dur_slider_, row, 1);

app/main.cpp

@@ -341,6 +341,16 @@ int main(int argc, char *argv[])
 		a.reset(new QCoreApplication(argc, argv));
 	}
 
+	// Configuration errors are reported through a UI handler so the engine
+	// layer (config) never has to know about dialogs
+	olive::Config::set_error_handler(
+		[](const QString &title, const QString &message) {
+			QWidget *parent =
+				olive::Core::instance() ? olive::Core::instance()->main_window() :
+										  nullptr;
+			QMessageBox::critical(parent, title, message, QMessageBox::Ok);
+		});
+
 	olive::Config::load();
 	const QString graphics_backend =
 		olive::Config::current()[QStringLiteral("GraphicsBackend")]

app/node/audio/pan/pan.cpp

@@ -21,7 +21,7 @@
 
 #include "pan.h"
 
-#include "widget/slider/floatslider.h"
+#include "node/sliderdisplaytype.h"
 
 namespace olive
 {
@@ -40,7 +40,7 @@ PanNode::PanNode()
 	set_input_property(k_panning_input, QStringLiteral("min"), -1.0);
 	set_input_property(k_panning_input, QStringLiteral("max"), 1.0);
 	set_input_property(k_panning_input, QStringLiteral("view"),
-					 FloatSlider::k_percentage);
+					 slider::k_percentage);
 
 	set_flag(k_audio_effect);
 	set_effect_input(k_samples_input);

app/node/audio/volume/volume.cpp

@@ -21,7 +21,7 @@
 
 #include "volume.h"
 
-#include "widget/slider/floatslider.h"
+#include "node/sliderdisplaytype.h"
 
 namespace olive
 {
@@ -39,7 +39,7 @@ VolumeNode::VolumeNode()
 	add_input(k_volume_input, NodeValue::k_float, 1.0);
 	set_input_property(k_volume_input, QStringLiteral("min"), 0.0);
 	set_input_property(k_volume_input, QStringLiteral("view"),
-					 FloatSlider::k_decibel);
+					 slider::k_decibel);
 
 	set_flag(k_audio_effect);
 	set_effect_input(k_samples_input);

app/node/block/block.cpp

@@ -24,7 +24,7 @@
 #include <QDebug>
 
 #include "node/inputdragger.h"
-#include "widget/slider/rationalslider.h"
+#include "node/sliderdisplaytype.h"
 
 namespace olive
 {
@@ -44,7 +44,7 @@ Block::Block()
 	set_input_property(k_length_input, QStringLiteral("min"),
 					 QVariant::fromValue(Rational(0, 1)));
 	set_input_property(k_length_input, QStringLiteral("view"),
-					 RationalSlider::k_time);
+					 slider::k_time);
 	set_input_property(k_length_input, QStringLiteral("viewlock"), true);
 
 	set_input_flag(k_enabled_input, k_input_flag_not_connectable);

app/node/block/clip/clip.cpp

@@ -26,8 +26,8 @@
 #include "node/output/track/track.h"
 #include "node/output/viewer/viewer.h"
 #include "node/project/sequence/sequence.h"
-#include "widget/slider/floatslider.h"
-#include "widget/slider/rationalslider.h"
+#include "node/sliderdisplaytype.h"
+#include "node/sliderdisplaytype.h"
 
 namespace olive
 {
@@ -51,13 +51,13 @@ ClipBlock::ClipBlock()
 	add_input(k_media_in_input, NodeValue::k_rational,
 			 InputFlags(k_input_flag_not_connectable | k_input_flag_not_keyframable));
 	set_input_property(k_media_in_input, QStringLiteral("view"),
-					 RationalSlider::k_time);
+					 slider::k_time);
 	set_input_property(k_media_in_input, QStringLiteral("viewlock"), true);
 
 	add_input(k_speed_input, NodeValue::k_float, 1.0,
 			 InputFlags(k_input_flag_not_connectable | k_input_flag_not_keyframable));
 	set_input_property(k_speed_input, QStringLiteral("view"),
-					 FloatSlider::k_percentage);
+					 slider::k_percentage);
 	set_input_property(k_speed_input, QStringLiteral("min"), 0.0);
 
 	add_input(k_reverse_input, NodeValue::k_boolean, false,

app/node/block/transition/transition.cpp

@@ -23,7 +23,7 @@
 
 #include "node/block/clip/clip.h"
 #include "node/output/track/track.h"
-#include "widget/slider/rationalslider.h"
+#include "node/sliderdisplaytype.h"
 
 namespace olive
 {
@@ -51,7 +51,7 @@ TransitionBlock::TransitionBlock()
 	add_input(k_center_input, NodeValue::k_rational,
 			 InputFlags(k_input_flag_not_keyframable | k_input_flag_not_connectable));
 	set_input_property(k_center_input, QStringLiteral("view"),
-					 RationalSlider::k_time);
+					 slider::k_time);
 	set_input_property(k_center_input, QStringLiteral("viewlock"), true);
 
 	set_flag(k_dont_show_in_param_view, false);

app/node/color/ociogradingtransformlinear/ociogradingtransformlinear.cpp

@@ -26,7 +26,7 @@
 #include "common/ocioutils.h"
 #include "node/project.h"
 #include "render/colorprocessor.h"
-#include "widget/slider/floatslider.h"
+#include "node/sliderdisplaytype.h"
 
 namespace olive
 {
@@ -71,7 +71,7 @@ OCIOGradingTransformLinearNode::OCIOGradingTransformLinearNode()
 
 	add_input(k_saturation_input, NodeValue::k_float, 1.0);
 	set_input_property(k_saturation_input, QStringLiteral("view"),
-					 FloatSlider::k_percentage);
+					 slider::k_percentage);
 	set_input_property(k_saturation_input, QStringLiteral("min"), 0.0);
 
 	add_input(k_pivot_input, NodeValue::k_float,

app/node/color/ociogradingtransformlog/ociogradingtransformlog.cpp

@@ -26,7 +26,7 @@
 #include "common/ocioutils.h"
 #include "node/project.h"
 #include "render/colorprocessor.h"
-#include "widget/slider/floatslider.h"
+#include "node/sliderdisplaytype.h"
 
 namespace olive
 {
@@ -71,7 +71,7 @@ OCIOGradingTransformLogNode::OCIOGradingTransformLogNode()
 
 	add_input(k_saturation_input, NodeValue::k_float, 1.0);
 	set_input_property(k_saturation_input, QStringLiteral("view"),
-					 FloatSlider::k_percentage);
+					 slider::k_percentage);
 	set_input_property(k_saturation_input, QStringLiteral("min"), 0.0);
 
 	add_input(k_pivot_input, NodeValue::k_float,

app/node/color/ociolut/ociolut.cpp

@@ -20,10 +20,10 @@
 
 #include "ociolut.h"
 
+#include <QApplication>
 #include <QFileInfo>
 #include <QMetaObject>
 
-#include <QApplication>
 
 #include "core.h"
 #include "node/color/colormanager/colormanager.h"

app/node/color/threewaycolor/threewaycolor.cpp

@@ -24,7 +24,7 @@
 #include <QVector3D>
 
 #include "node/project.h"
-#include "widget/slider/floatslider.h"
+#include "node/sliderdisplaytype.h"
 
 namespace olive
 {
@@ -66,9 +66,9 @@ ThreeWayColorNode::ThreeWayColorNode()
 	set_input_property(k_shadows_amount_input, min, 0.0);
 	set_input_property(k_midtones_amount_input, min, 0.0);
 	set_input_property(k_highlights_amount_input, min, 0.0);
-	set_input_property(k_shadows_amount_input, view, FloatSlider::k_percentage);
-	set_input_property(k_midtones_amount_input, view, FloatSlider::k_percentage);
-	set_input_property(k_highlights_amount_input, view, FloatSlider::k_percentage);
+	set_input_property(k_shadows_amount_input, view, slider::k_percentage);
+	set_input_property(k_midtones_amount_input, view, slider::k_percentage);
+	set_input_property(k_highlights_amount_input, view, slider::k_percentage);
 
 	set_effect_input(k_texture_input);
 	set_flag(k_video_effect);

app/node/color/whitebalance/whitebalance.cpp

@@ -25,7 +25,7 @@
 #include "common/filefunctions.h"
 #include "render/job/shaderjob.h"
 #include "render/texture.h"
-#include "widget/slider/floatslider.h"
+#include "node/sliderdisplaytype.h"
 
 namespace olive
 {
@@ -47,7 +47,7 @@ WhiteBalanceNode::WhiteBalanceNode()
 	set_input_property(k_temperature_input, QStringLiteral("min"), 1000.0);
 	set_input_property(k_temperature_input, QStringLiteral("max"), 40000.0);
 	set_input_property(k_temperature_input, QStringLiteral("view"),
-					 FloatSlider::k_normal);
+					 slider::k_normal);
 
 	add_input(k_tint_input, NodeValue::k_float, 0.0);
 	set_input_property(k_tint_input, QStringLiteral("min"), -1.0);

app/node/distort/cornerpin/cornerpindistortnode.cpp

@@ -23,7 +23,6 @@
 
 #include "common/lerp.h"
 #include "core.h"
-#include "widget/slider/floatslider.h"
 
 namespace olive
 {

app/node/distort/crop/cropdistortnode.cpp

@@ -23,7 +23,7 @@
 
 #include "common/util.h"
 #include "core.h"
-#include "widget/slider/floatslider.h"
+#include "node/sliderdisplaytype.h"
 
 namespace olive
 {
@@ -183,7 +183,7 @@ void CropDistortNode::create_crop_side_input(const QString &id)
 	add_input(id, NodeValue::k_float, 0.0);
 	set_input_property(id, QStringLiteral("min"), 0.0);
 	set_input_property(id, QStringLiteral("max"), 1.0);
-	set_input_property(id, QStringLiteral("view"), FloatSlider::k_percentage);
+	set_input_property(id, QStringLiteral("view"), slider::k_percentage);
 }
 
 }

app/node/distort/tile/tiledistortnode.cpp

@@ -21,7 +21,7 @@
 
 #include "tiledistortnode.h"
 
-#include "widget/slider/floatslider.h"
+#include "node/sliderdisplaytype.h"
 
 namespace olive
 {
@@ -43,7 +43,7 @@ TileDistortNode::TileDistortNode()
 	add_input(k_scale_input, NodeValue::k_float, 0.5);
 	set_input_property(k_scale_input, QStringLiteral("min"), 0);
 	set_input_property(k_scale_input, QStringLiteral("view"),
-					 FloatSlider::k_percentage);
+					 slider::k_percentage);
 
 	add_input(k_position_input, NodeValue::k_vec2, QVector2D(0, 0));
 

app/node/effect/opacity/opacityeffect.cpp

@@ -19,7 +19,7 @@
 #include "opacityeffect.h"
 
 #include "node/math/math/math.h"
-#include "widget/slider/floatslider.h"
+#include "node/sliderdisplaytype.h"
 
 namespace olive
 {
@@ -43,7 +43,7 @@ OpacityEffect::OpacityEffect()
 
 	add_input(k_value_input, NodeValue::k_float, 1.0);
 	set_input_property(k_value_input, QStringLiteral("view"),
-					 FloatSlider::k_percentage);
+					 slider::k_percentage);
 	set_input_property(k_value_input, QStringLiteral("min"), 0.0);
 	set_input_property(k_value_input, QStringLiteral("max"), 1.0);
 

app/node/filter/dropshadow/dropshadowfilter.cpp

@@ -21,7 +21,7 @@
 
 #include "dropshadowfilter.h"
 
-#include "widget/slider/floatslider.h"
+#include "node/sliderdisplaytype.h"
 
 namespace olive
 {
@@ -54,7 +54,7 @@ DropShadowFilter::DropShadowFilter()
 	add_input(k_opacity_input, NodeValue::k_float, 1.0);
 	set_input_property(k_opacity_input, QStringLiteral("min"), 0.0);
 	set_input_property(k_opacity_input, QStringLiteral("view"),
-					 FloatSlider::k_percentage);
+					 slider::k_percentage);
 
 	add_input(k_fast_input, NodeValue::k_boolean, false);
 

app/node/filter/stroke/stroke.cpp

@@ -21,7 +21,7 @@
 
 #include "stroke.h"
 
-#include "widget/slider/floatslider.h"
+#include "node/sliderdisplaytype.h"
 
 namespace olive
 {
@@ -47,7 +47,7 @@ StrokeFilterNode::StrokeFilterNode()
 
 	add_input(k_opacity_input, NodeValue::k_float, 1.0f);
 	set_input_property(k_opacity_input, QStringLiteral("view"),
-					 FloatSlider::k_percentage);
+					 slider::k_percentage);
 	set_input_property(k_opacity_input, QStringLiteral("min"), 0.0f);
 	set_input_property(k_opacity_input, QStringLiteral("max"), 1.0f);
 

app/node/generator/matrix/matrix.cpp

@@ -24,7 +24,7 @@
 #include <QMatrix4x4>
 #include <QVector2D>
 
-#include "widget/slider/floatslider.h"
+#include "node/sliderdisplaytype.h"
 
 namespace olive
 {
@@ -47,7 +47,7 @@ MatrixGenerator::MatrixGenerator()
 	add_input(k_scale_input, NodeValue::k_vec2, QVector2D(1.0f, 1.0f));
 	set_input_property(k_scale_input, QStringLiteral("min"), QVector2D(0, 0));
 	set_input_property(k_scale_input, QStringLiteral("view"),
-					 FloatSlider::k_percentage);
+					 slider::k_percentage);
 	set_input_property(k_scale_input, QStringLiteral("disable1"), true);
 
 	add_input(k_uniform_scale_input, NodeValue::k_boolean, true,

app/node/generator/noise/noise.cpp

@@ -21,7 +21,7 @@
 
 #include "noise.h"
 
-#include "widget/slider/floatslider.h"
+#include "node/sliderdisplaytype.h"
 
 namespace olive
 {
@@ -40,7 +40,7 @@ NoiseGeneratorNode::NoiseGeneratorNode()
 
 	add_input(k_strength_input, NodeValue::k_float, 0.2);
 	set_input_property(k_strength_input, QStringLiteral("view"),
-					 FloatSlider::k_percentage);
+					 slider::k_percentage);
 	set_input_property(k_strength_input, QStringLiteral("min"), 0);
 
 	add_input(k_color_input, NodeValue::k_boolean, false);

app/node/output/track/track.cpp

@@ -21,7 +21,6 @@
 
 #include "track.h"
 
-#include <QApplication>
 #include <QDebug>
 #include <QFontMetrics>
 

app/node/project.cpp

@@ -28,14 +28,14 @@
 #include "common/qtutils.h"
 #include "common/xmlutils.h"
 #include "core.h"
-#include "dialog/progress/progress.h"
 #include "node/color/ociobase/ociobase.h"
 #include "node/factory.h"
+#include "node/group/group.h"
+#include "node/project/folder/folder.h"
 #include "node/serializeddata.h"
 #include "pluginSupport/olivehost.h"
 #include "ofxhPluginCache.h"
 #include "render/diskmanager.h"
-#include "window/mainwindow/mainwindow.h"
 
 namespace olive
 {

app/node/project.h

@@ -27,9 +27,10 @@
 #include <QUuid>
 
 #include "node/output/viewer/viewer.h"
+#include "node/project/folder/folder.h"
 #include "node/project/footage/footage.h"
+#include "node/project/sequence/sequence.h"
 #include "node/color/colormanager/colormanager.h"
-#include "window/mainwindow/mainwindowlayoutinfo.h"
 
 namespace olive
 {

app/node/project/sequence/sequence.cpp

@@ -23,7 +23,6 @@
 
 #include <QThread>
 
-#include "panel/timeline/timeline.h"
 #include "ui/icons/icons.h"
 #include "timeline/timelineundogeneral.h"
 

app/node/project/serializer/CMakeLists.txt

@@ -33,6 +33,9 @@ set(OLIVE_SOURCES
         node/project/serializer/serializer230220.h
 
 
+        node/project/serializer/mainwindowlayoutinfo.cpp
+        node/project/serializer/mainwindowlayoutinfo.h
+
         node/project/serializer/typeserializer.cpp
         node/project/serializer/typeserializer.h
 

app/node/project/serializer/mainwindowlayoutinfo.cpp

@@ -63,7 +63,7 @@ void MainWindowLayoutInfo::to_xml(QXmlStreamWriter *writer) const
 
 		writer->writeAttribute(QStringLiteral("id"), it->first);
 
-		const PanelWidget::Info &info = it->second;
+		const PanelLayoutInfo &info = it->second;
 		for (auto jt = info.cbegin(); jt != info.cend(); jt++) {
 			writer->writeStartElement(QStringLiteral("option"));
 
@@ -158,7 +158,7 @@ MainWindowLayoutInfo::from_xml(QXmlStreamReader *reader,
 					}
 
 					if (!id.isEmpty()) {
-						PanelWidget::Info i;
+						PanelLayoutInfo i;
 
 						while (xml_read_next_start_element(reader)) {
 							if (reader->name() == QStringLiteral("option")) {
@@ -211,7 +211,7 @@ void MainWindowLayoutInfo::add_viewer(ViewerOutput *viewer)
 }
 
 void MainWindowLayoutInfo::set_panel_data(const QString &id,
-										  const PanelWidget::Info &data)
+										  const PanelLayoutInfo &data)
 {
 	panel_data_[id] = data;
 }
@@ -219,7 +219,7 @@ void MainWindowLayoutInfo::set_panel_data(const QString &id,
 void MainWindowLayoutInfo::move_panel_data(const QString &old,
 										   const QString &now)
 {
-	PanelWidget::Info tmp = panel_data_.at(old);
+	PanelLayoutInfo tmp = panel_data_.at(old);
 	panel_data_.erase(old);
 	panel_data_[now] = tmp;
 }

app/node/project/serializer/mainwindowlayoutinfo.h

@@ -19,13 +19,22 @@
 #ifndef OAK_MAINWINDOWLAYOUTINFO_H
 #define OAK_MAINWINDOWLAYOUTINFO_H
 
+#include <map>
+
 #include "node/project/folder/folder.h"
 #include "node/project/sequence/sequence.h"
-#include "panel/panel.h"
 
 namespace olive
 {
 
+/**
+ * @brief Per-panel layout data (key/value pairs)
+ *
+ * Identical to PanelWidget::Info in the UI layer; defined here so the
+ * engine-side layout data structure does not depend on widget headers.
+ */
+using PanelLayoutInfo = std::map<QString, QString>;
+
 class MainWindowLayoutInfo {
 public:
 	MainWindowLayoutInfo() = default;
@@ -41,7 +50,7 @@ public:
 
 	void add_viewer(ViewerOutput *viewer);
 
-	void set_panel_data(const QString &id, const PanelWidget::Info &data);
+	void set_panel_data(const QString &id, const PanelLayoutInfo &data);
 
 	void move_panel_data(const QString &old, const QString &now);
 
@@ -62,7 +71,7 @@ public:
 		return open_viewers_;
 	}
 
-	const std::map<QString, PanelWidget::Info> &panel_data() const
+	const std::map<QString, PanelLayoutInfo> &panel_data() const
 	{
 		return panel_data_;
 	}
@@ -81,7 +90,7 @@ private:
 
 	std::vector<ViewerOutput *> open_viewers_;
 
-	std::map<QString, PanelWidget::Info> panel_data_;
+	std::map<QString, PanelLayoutInfo> panel_data_;
 
 	static const unsigned int k_version = 1;
 };

app/node/project/serializer/serializer.h

@@ -26,6 +26,7 @@
 
 #include "common/define.h"
 #include "node/project.h"
+#include "node/project/serializer/mainwindowlayoutinfo.h"
 #include "typeserializer.h"
 
 namespace olive

app/node/sliderdisplaytype.h

@@ -0,0 +1,47 @@
+/***
+
+  Oak - Non-Linear Video Editor
+  Copyright (C) 2026 Oak Team
+
+  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 3 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, see <http://www.gnu.org/licenses/>.
+
+***/
+
+#ifndef OAK_SLIDERDISPLAYTYPE_H
+#define OAK_SLIDERDISPLAYTYPE_H
+
+namespace olive
+{
+
+/**
+ * @brief Slider display type enums shared by nodes and widgets
+ *
+ * Nodes reference these enums in their input properties ("view"); the
+ * slider widgets in app/widget/slider use the same values to render. The
+ * definitions live in the engine layer so nodes do not depend on widget
+ * headers. Enumerator order is ABI/feature compatible with the previous
+ * FloatSlider::DisplayType and RationalSlider::DisplayType.
+ */
+namespace slider
+{
+
+enum FloatDisplayType { k_normal, k_decibel, k_percentage };
+
+enum RationalDisplayType { k_time, k_float, k_rational };
+
+} // namespace slider
+
+} // namespace olive
+
+#endif // OAK_SLIDERDISPLAYTYPE_H

app/node/time/timeoffset/timeoffsetnode.cpp

@@ -21,7 +21,7 @@
 
 #include "timeoffsetnode.h"
 
-#include "widget/slider/rationalslider.h"
+#include "node/sliderdisplaytype.h"
 
 namespace olive
 {
@@ -35,7 +35,7 @@ TimeOffsetNode::TimeOffsetNode()
 {
 	add_input(k_time_input, NodeValue::k_rational, QVariant::fromValue(Rational(0)),
 			 InputFlags(k_input_flag_not_connectable));
-	set_input_property(k_time_input, QStringLiteral("view"), RationalSlider::k_time);
+	set_input_property(k_time_input, QStringLiteral("view"), slider::k_time);
 	set_input_property(k_time_input, QStringLiteral("viewlock"), true);
 
 	add_input(k_input_input, NodeValue::k_none,

app/node/time/timeremap/timeremap.cpp

@@ -21,7 +21,7 @@
 
 #include "timeremap.h"
 
-#include "widget/slider/rationalslider.h"
+#include "node/sliderdisplaytype.h"
 
 namespace olive
 {
@@ -35,7 +35,7 @@ TimeRemapNode::TimeRemapNode()
 {
 	add_input(k_time_input, NodeValue::k_rational, QVariant::fromValue(Rational(0)),
 			 InputFlags(k_input_flag_not_connectable));
-	set_input_property(k_time_input, QStringLiteral("view"), RationalSlider::k_time);
+	set_input_property(k_time_input, QStringLiteral("view"), slider::k_time);
 	set_input_property(k_time_input, QStringLiteral("viewlock"), true);
 
 	add_input(k_input_input, NodeValue::k_none,

app/render/previewautocacher.cpp

@@ -21,7 +21,6 @@
 
 #include "previewautocacher.h"
 
-#include <QApplication>
 #include <QPointer>
 #include <QtConcurrent/QtConcurrent>
 

app/render/rendermanager.cpp

@@ -21,7 +21,6 @@
 
 #include "rendermanager.h"
 
-#include <QApplication>
 #include <QMatrix4x4>
 #include <QThread>
 
@@ -35,7 +34,6 @@
 #include "renderworkerpool.h"
 #include "task/conform/conform.h"
 #include "task/taskmanager.h"
-#include "window/mainwindow/mainwindow.h"
 
 namespace olive
 {

app/render/rendermanager.h

@@ -26,7 +26,6 @@
 
 #include "config/config.h"
 #include "colorprocessorcache.h"
-#include "dialog/rendercancel/rendercancel.h"
 #include "node/output/viewer/viewer.h"
 #include "node/project.h"
 #include "node/traverser.h"

app/task/project/import/CMakeLists.txt

@@ -18,7 +18,5 @@ set(OLIVE_SOURCES
         ${OLIVE_SOURCES}
         task/project/import/import.h
         task/project/import/import.cpp
-        task/project/import/importerrordialog.h
-        task/project/import/importerrordialog.cpp
         PARENT_SCOPE
 )

app/task/project/import/import.h

@@ -26,8 +26,9 @@
 #include <QUndoCommand>
 
 #include "codec/decoder.h"
+#include "node/project/footage/footage.h"
+#include "node/project/folder/folder.h"
 #include "task/task.h"
-#include "widget/projectexplorer/projectviewmodel.h"
 
 namespace olive
 {

app/task/project/load/load.h

@@ -23,7 +23,7 @@
 #define OAK_PROJECTLOADMANAGER_H
 
 #include "loadbasetask.h"
-#include "window/mainwindow/mainwindowlayoutinfo.h"
+#include "node/project/serializer/mainwindowlayoutinfo.h"
 
 namespace olive
 {

app/task/project/load/loadbasetask.h

@@ -23,6 +23,7 @@
 #define OAK_PROJECTLOADBASETASK_H
 
 #include "node/project.h"
+#include "node/project/serializer/mainwindowlayoutinfo.h"
 #include "task/task.h"
 
 namespace olive

app/task/project/save/save.h

@@ -23,6 +23,7 @@
 #define OAK_PROJECTSAVEMANAGER_H
 
 #include "node/project.h"
+#include "node/project/serializer/mainwindowlayoutinfo.h"
 #include "task/task.h"
 
 namespace olive

app/widget/curvewidget/curveview.cpp

@@ -664,7 +664,7 @@ CurveView::get_float_display_type_from_keyframe(NodeKeyframe *key)
 	}
 
 	// Fallback to normal
-	return FloatSlider::k_normal;
+	return slider::k_normal;
 }
 
 double CurveView::get_offset_from_keyframe(NodeKeyframe *key)

app/widget/playbackcontrols/playbackcontrols.cpp

@@ -57,7 +57,7 @@ PlaybackControls::PlaybackControls(QWidget *parent)
 	lower_left_layout->setContentsMargins(0, 0, 0, 0);
 
 	cur_tc_lbl_ = new RationalSlider();
-	cur_tc_lbl_->set_display_type(RationalSlider::k_time);
+	cur_tc_lbl_->set_display_type(slider::k_time);
 	cur_tc_lbl_->set_minimum(0);
 	connect(cur_tc_lbl_, &RationalSlider::value_changed, this,
 			&PlaybackControls::time_changed);

app/widget/slider/floatslider.cpp

@@ -33,7 +33,7 @@ namespace olive
 
 FloatSlider::FloatSlider(QWidget *parent)
 	: super(parent)
-	, display_type_(k_normal)
+	, display_type_(slider::k_normal)
 {
 	set_value(0.0);
 }
@@ -68,13 +68,13 @@ void FloatSlider::set_display_type(const FloatSlider::DisplayType &type)
 	display_type_ = type;
 
 	switch (display_type_) {
-	case k_normal:
+	case slider::k_normal:
 		clear_format();
 		break;
-	case k_decibel:
+	case slider::k_decibel:
 		set_format(tr("%1 dB"));
 		break;
-	case k_percentage:
+	case slider::k_percentage:
 		set_format(tr("%1%"));
 		break;
 	}
@@ -83,12 +83,12 @@ void FloatSlider::set_display_type(const FloatSlider::DisplayType &type)
 double FloatSlider::transform_value_to_display(double val, DisplayType display)
 {
 	switch (display) {
-	case k_normal:
+	case slider::k_normal:
 		break;
-	case k_decibel:
+	case slider::k_decibel:
 		val = Decibel::from_linear(val);
 		break;
-	case k_percentage:
+	case slider::k_percentage:
 		val *= 100.0;
 		break;
 	}
@@ -99,12 +99,12 @@ double FloatSlider::transform_value_to_display(double val, DisplayType display)
 double FloatSlider::transform_display_to_value(double val, DisplayType display)
 {
 	switch (display) {
-	case k_normal:
+	case slider::k_normal:
 		break;
-	case k_decibel:
+	case slider::k_decibel:
 		val = Decibel::to_linear(val);
 		break;
-	case k_percentage:
+	case slider::k_percentage:
 		val *= 0.01;
 		break;
 	}
@@ -117,7 +117,7 @@ QString FloatSlider::value_to_string(double val, FloatSlider::DisplayType displa
 								   bool autotrim_decimal_places)
 {
 	// Return negative infinity for zero volume
-	if (display == k_decibel && qIsNull(val)) {
+	if (display == slider::k_decibel && qIsNull(val)) {
 		return tr("\xE2\x88\x9E");
 	}
 
@@ -154,17 +154,17 @@ QVariant FloatSlider::adjust_drag_distance_internal(const QVariant &start,
 												 const double &drag) const
 {
 	switch (display_type_) {
-	case k_normal:
+	case slider::k_normal:
 		// No change here
 		break;
-	case k_decibel: {
+	case slider::k_decibel: {
 		double current_db = Decibel::from_linear(start.toDouble());
 		current_db += drag;
 		double adjusted_linear = Decibel::to_linear(current_db);
 
 		return adjusted_linear;
 	}
-	case k_percentage:
+	case slider::k_percentage:
 		return super::adjust_drag_distance_internal(start, drag * 0.01);
 	}
 

app/widget/slider/floatslider.h

@@ -23,6 +23,7 @@
 #define OAK_FLOATSLIDER_H
 
 #include "base/decimalsliderbase.h"
+#include "node/sliderdisplaytype.h"
 
 namespace olive
 {
@@ -32,7 +33,10 @@ class FloatSlider : public DecimalSliderBase {
 public:
 	FloatSlider(QWidget *parent = nullptr);
 
-	enum DisplayType { k_normal, k_decibel, k_percentage };
+	// The canonical definition lives in the engine layer
+	// (node/sliderdisplaytype.h); this alias keeps existing call sites
+	// source-compatible. Use slider::k_normal etc. for the enumerators.
+	using DisplayType = slider::FloatDisplayType;
 
 	double get_value() const;
 

app/widget/slider/rationalslider.cpp

@@ -39,7 +39,7 @@ RationalSlider::RationalSlider(QWidget *parent)
 	connect(SliderBase::label(), &SliderLabel::customContextMenuRequested, this,
 			&RationalSlider::show_display_type_menu);
 
-	set_display_type(k_float);
+	set_display_type(slider::k_float);
 
 	set_value(Rational(0, 0));
 }
@@ -109,13 +109,13 @@ QString RationalSlider::value_to_string(const QVariant &v) const
 		double val = r.to_double() + get_offset().value<Rational>().to_double();
 
 		switch (display_type_) {
-		case k_time:
+		case slider::k_time:
 			return QString::fromStdString(Timecode::time_to_timecode(
 				r, timebase_, Core::instance()->get_timecode_display()));
-		case k_float:
+		case slider::k_float:
 			return float_to_string(val, get_decimal_places(),
 								 get_auto_trim_decimal_places());
-		case k_rational:
+		case slider::k_rational:
 			return QString::fromStdString(v.value<Rational>().to_string());
 		}
 
@@ -129,13 +129,13 @@ QVariant RationalSlider::string_to_value(const QString &s, bool *ok) const
 	*ok = false;
 
 	switch (display_type_) {
-	case k_time: {
+	case slider::k_time: {
 		r = Timecode::timecode_to_time(s.toStdString(), timebase_,
 									   Core::instance()->get_timecode_display(),
 									   ok);
 		break;
 	}
-	case k_float: {
+	case slider::k_float: {
 		// First, convert to a double
 		double d = s.toDouble(ok);
 		if (!(*ok)) {
@@ -146,7 +146,7 @@ QVariant RationalSlider::string_to_value(const QString &s, bool *ok) const
 		r = Rational::from_double(d, ok);
 		break;
 	}
-	case k_rational:
+	case slider::k_rational:
 		r = Rational::from_string(s.toStdString(), ok);
 		break;
 	}
@@ -185,29 +185,29 @@ void RationalSlider::show_display_type_menu()
 	Menu m(this);
 
 	if (!get_lock_display_type()) {
-		if (!disabled_.contains(k_float)) {
+		if (!disabled_.contains(slider::k_float)) {
 			QAction *float_action = m.addAction(tr("Float"));
-			float_action->setData(k_float);
+			float_action->setData(slider::k_float);
 			connect(float_action, &QAction::triggered, this,
 					&RationalSlider::set_display_type_from_menu);
 		}
 
-		if (!disabled_.contains(k_rational)) {
+		if (!disabled_.contains(slider::k_rational)) {
 			QAction *rational_action = m.addAction(tr("Rational"));
-			rational_action->setData(k_rational);
+			rational_action->setData(slider::k_rational);
 			connect(rational_action, &QAction::triggered, this,
 					&RationalSlider::set_display_type_from_menu);
 		}
 
-		if (!disabled_.contains(k_time)) {
+		if (!disabled_.contains(slider::k_time)) {
 			QAction *time_action = m.addAction(tr("Time"));
-			time_action->setData(k_time);
+			time_action->setData(slider::k_time);
 			connect(time_action, &QAction::triggered, this,
 					&RationalSlider::set_display_type_from_menu);
 		}
 	}
 
-	if (display_type_ == k_time) {
+	if (display_type_ == slider::k_time) {
 		if (!m.actions().isEmpty()) {
 			m.addSeparator();
 		}

app/widget/slider/rationalslider.h

@@ -26,6 +26,7 @@
 #include <QMouseEvent>
 
 #include "base/decimalsliderbase.h"
+#include "node/sliderdisplaytype.h"
 
 namespace olive
 {
@@ -43,8 +44,12 @@ class RationalSlider : public DecimalSliderBase {
 public:
 	/**
    * @brief enum containing the possibly display types
+   *
+   * The canonical definition lives in the engine layer
+   * (node/sliderdisplaytype.h); this alias keeps existing call sites
+   * source-compatible. Use slider::k_time etc. for the enumerators.
    */
-	enum DisplayType { k_time, k_float, k_rational };
+	using DisplayType = slider::RationalDisplayType;
 
 	RationalSlider(QWidget *parent = nullptr);
 

app/widget/timelinewidget/timelinewidget.cpp

@@ -161,7 +161,7 @@ TimelineWidget::TimelineWidget(QWidget *parent)
 
 	timecode_label_ = new RationalSlider();
 	timecode_label_->set_alignment(Qt::AlignCenter);
-	timecode_label_->set_display_type(RationalSlider::k_time);
+	timecode_label_->set_display_type(slider::k_time);
 	timecode_label_->setVisible(false);
 	timecode_label_->set_minimum(0);
 	ruler_and_time_layout->addWidget(timecode_label_);

app/widget/timelinewidget/tool/import.h

@@ -22,6 +22,7 @@
 #ifndef OAK_IMPORTTIMELINETOOL_H
 #define OAK_IMPORTTIMELINETOOL_H
 
+#include "common/dropworkflowbehavior.h"
 #include "tool.h"
 
 namespace olive
@@ -46,12 +47,12 @@ public:
 				 bool insert, MultiUndoCommand *command, int track_offset = 0,
 				 bool jump_to_end = false);
 
-	enum DropWithoutSequenceBehavior {
-		k_dws_ask,
-		k_dws_auto,
-		k_dws_manual,
-		k_dws_disable
-	};
+	// The canonical definition lives in the engine layer
+	// (common/dropworkflowbehavior.h); this alias keeps existing call
+	// sites source-compatible. Use olive::k_dws_ask etc. for the
+	// enumerators (visible unqualified inside namespace olive).
+	using DropWithoutSequenceBehavior =
+		olive::DropWithoutSequenceBehavior;
 
 private:
 	void footage_to_ghosts(Rational ghost_start,

app/window/mainwindow/CMakeLists.txt

@@ -22,8 +22,6 @@ set(OLIVE_SOURCES
         window/mainwindow/mainstatusbar.cpp
         window/mainwindow/mainwindow.h
         window/mainwindow/mainwindow.cpp
-        window/mainwindow/mainwindowlayoutinfo.h
-        window/mainwindow/mainwindowlayoutinfo.cpp
         window/mainwindow/mainwindowundo.h
         window/mainwindow/mainwindowundo.cpp
         PARENT_SCOPE

app/window/mainwindow/mainwindow.h

@@ -25,7 +25,7 @@
 #include <kddockwidgets/Config.h>
 #include <kddockwidgets/MainWindow.h>
 
-#include "mainwindowlayoutinfo.h"
+#include "node/project/serializer/mainwindowlayoutinfo.h"
 #include "node/project.h"
 #include "panel/multicam/multicampanel.h"
 #include "panel/panelmanager.h"