Layout
ListDetailView
Shows a list and detail side by side, or one pane at a time in a narrow space. The same content widgets stay alive across layout changes.
Example

Usage
One pane or two
Choose Narrow preview, open the meeting note and edit its text. Go back to the notes or switch to Wide preview: the same note keeps your changes.
#include <FluentQt/Layout.h>
using namespace fluent::layout;
auto* panel = new QWidget(this);
auto* body = new QVBoxLayout(panel);
body->setContentsMargins(0, 0, 0, 0);
body->setSpacing(12);
auto* width = new ComboBox(panel);
width->setAccessibleName("Preview width");
width->addItems({"Wide preview", "Narrow preview"});
body->addWidget(width, 0, Qt::AlignLeft);
auto* view = new fluent::layout::ListDetailView(panel);
view->setCompactThreshold(520);
view->setMaximumWidth(640);
view->setFixedHeight(156);
body->addWidget(view, 0, Qt::AlignLeft);
auto* list = new QVBoxLayout(view->listPane());
list->addWidget(new Label("Notes", view->listPane()));
auto* open = new Button("Open meeting note", view->listPane());
list->addWidget(open);
list->addStretch();
auto* detail = new QVBoxLayout(view->detailPane());
auto* back = new Button("Back to notes", view->detailPane());
back->setFluentStyle(Button::Subtle);
back->setVisible(view->isCompact());
detail->addWidget(back, 0, Qt::AlignLeft);
detail->addWidget(new Label("Meeting note", view->detailPane()));
auto* editor = new LineEdit(view->detailPane());
editor->setAccessibleName("Note draft");
editor->setText("Discuss the next release");
detail->addWidget(editor);
detail->addStretch();
connect(open, &Button::clicked, view, &fluent::layout::ListDetailView::showDetail);
connect(back, &Button::clicked, view, &fluent::layout::ListDetailView::showList);
connect(view, &fluent::layout::ListDetailView::compactChanged, back, &QWidget::setVisible);
connect(width, qOverload<int>(&ComboBox::currentIndexChanged), view, [view](int index) {
view->setMaximumWidth(index == 0 ? 640 : 360);
});import fluentqt
from PySide6.QtCore import Qt
from PySide6.QtWidgets import QVBoxLayout, QWidget
panel = QWidget()
body = QVBoxLayout(panel)
body.setContentsMargins(0, 0, 0, 0)
body.setSpacing(12)
width = fluentqt.ComboBox(panel)
width.setObjectName("listDetailPreviewWidth")
width.setAccessibleName("Preview width")
width.addItems(["Wide preview", "Narrow preview"])
body.addWidget(width, 0, Qt.AlignLeft)
view = fluentqt.ListDetailView(panel)
view.setObjectName("basicListDetailView")
view.setCompactThreshold(520)
view.setMaximumWidth(640)
view.setFixedHeight(156)
body.addWidget(view, 0, Qt.AlignLeft)
list_layout = QVBoxLayout(view.listPane())
list_layout.addWidget(fluentqt.Label("Notes", view.listPane()))
open_button = fluentqt.Button("Open meeting note", view.listPane())
list_layout.addWidget(open_button)
list_layout.addStretch()
detail_layout = QVBoxLayout(view.detailPane())
back = fluentqt.Button("Back to notes", view.detailPane())
back.setFluentStyle(fluentqt.Button.Subtle)
back.setVisible(view.isCompact())
detail_layout.addWidget(back, 0, Qt.AlignLeft)
detail_layout.addWidget(fluentqt.Label("Meeting note", view.detailPane()))
editor = fluentqt.LineEdit(view.detailPane())
editor.setAccessibleName("Note draft")
editor.setText("Discuss the next release")
detail_layout.addWidget(editor)
detail_layout.addStretch()
open_button.clicked.connect(view.showDetail)
back.clicked.connect(view.showList)
view.compactChanged.connect(back.setVisible)
width.currentIndexChanged.connect(
lambda index: view.setMaximumWidth(640 if index == 0 else 360)
)API
DeclarationNo matching API members.
fluent::layout::ListDetailView
Inherits QWidget · FluentElement · QMLPlus
Two persistent content panes that collapse to one at a width threshold.
Constructors
Properties
bool compact- Read
isCompact()NotifycompactChanged() int compactThreshold- Read
compactThreshold()WritesetCompactThreshold()NotifycompactThresholdChanged() int listPaneWidth- Read
listPaneWidth()WritesetListPaneWidth()NotifylistPaneWidthChanged() Pane currentPane- Read
currentPane()WritesetCurrentPane()NotifycurrentPaneChanged()
Methods
QWidget* listPane() constReturns the permanent, view-owned list content container.
QWidget* detailPane() constReturns the permanent, view-owned detail content container.
void setCompactThreshold(int width)Sets the width below which only currentPane is shown; minimum 1.
void setListPaneWidth(int width)Sets the wide list width, bounded to half the available width.
Signals
Enumerations
enum PaneActive destination in compact mode; wide mode shows both panes.
ListDetail
Subclass interfaces
Methods
Inherited from fluent::FluentElement
Methods
static void setTheme(Theme theme)Updates the global theme and notifies active FluentElement instances.
static void setThemeDeferred(Theme theme)Schedules a visible-first batched theme refresh without blocking the current interaction.
static Theme currentTheme()Returns the currently active global theme.
static bool themeUsesDarkAppearance(Theme theme)Returns whether a theme uses dark-backed chrome and material tokens.
static void refreshTheme()Re-broadcasts the current theme to repaint after a design-token change.
static int themeGeneration()Monotonic counter bumped on every theme change, for staleness checks.
Theme effectiveTheme() constResolves the theme used by this element, honoring an inherited QWidget override.
bool effectiveThemeUsesDarkAppearance() constReturns whether this element's effective theme uses dark-backed chrome.
bool setThemeOverrides(const QJsonObject& overrides)Component-facing token accessors.
QJsonObject themeOverrides() constReturns this element's authored overrides.
void clearThemeOverrides()Restores all token fields to global theme defaults.
const Colors& themeColorsRef() constNon-copying access to the active color set (for hot paint paths).
Material::AcrylicToken themeAcrylic() constMaterial, elevation, and adaptive layout tokens.
QColor themeBackdrop(bool active) constWindow-chrome backdrop color for the given activation state.
virtual void onThemeUpdated()Called after the global theme changes.
Enumerations
enum ThemeGlobal visual theme used when resolving design tokens.
Light = 0Dark = 1HighContrast = 2
Types and aliases
struct ColorsDesign token snapshots returned to components.
Inherited from fluent::QMLPlus
Methods
AnchorLayout::Anchors* anchors()Returns mutable anchors for the QWidget host.
void setState(const QString& name)Applies a named state, or clears state when name is empty.
void addState(const QMLState& state)Registers or replaces a named state definition.
void evaluateStates()Reevaluates conditions; the first registered true condition wins.
QMLPlusRuntime* runtime()Returns the lazy host-owned state observation object.
void setAnchors(const AnchorLayout::Anchors& anchors)Replaces all host anchors and invalidates the parent layout.
void resetAnchors()Clears all host anchors and invalidates the parent layout.
void bind(const char* targetProp, QObject* source, const char* sourceProp, PropertyBinder::Direction dir = PropertyBinder::OneWay)Binds a source property to a property on the QWidget host.
BindingHandle bindManaged(const char* targetProp, QObject* source, const char* sourceProp, PropertyBinder::Direction direction = PropertyBinder::OneWay, BindingOptions options = {})Installs a managed direct binding on this QWidget host.
BindingHandle bindComputed(const char* targetProp, const QVector<BindingDependency>& dependencies, std::function<QVariant()> evaluate, BindingOptions options = {})Installs an explicit-dependency C++ expression on this QWidget host.
void addTransition(const StateTransition& transition)Registers a state transition in precedence order.
void setBehavior(const char* propertyName, const PropertyAnimation& animation)Sets the default animation for this host's managed property writes.
void clearBehavior(const char* propertyName)Removes the default animation for future managed writes.
bool writeProperty(const char* propertyName, const QVariant& value)Writes a host property through Behavior without removing its binding.
All inherited Qt members:QWidget