Fluent-Qt

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

ListDetailView: One pane or two

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);
});

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()Notify compactChanged()
int compactThreshold
Read compactThreshold()Write setCompactThreshold()Notify compactThresholdChanged()
int listPaneWidth
Read listPaneWidth()Write setListPaneWidth()Notify listPaneWidthChanged()
Pane currentPane
Read currentPane()Write setCurrentPane()Notify currentPaneChanged()

Methods

QWidget* listPane() const

Returns the permanent, view-owned list content container.

QWidget* detailPane() const

Returns 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 Pane

Active destination in compact mode; wide mode shows both panes.

  • List
  • Detail
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() const

Resolves the theme used by this element, honoring an inherited QWidget override.

bool effectiveThemeUsesDarkAppearance() const

Returns whether this element's effective theme uses dark-backed chrome.

QJsonObject themeOverrides() const

Returns this element's authored overrides.

void clearThemeOverrides()

Restores all token fields to global theme defaults.

const Colors& themeColorsRef() const

Non-copying access to the active color set (for hot paint paths).

Material::AcrylicToken themeAcrylic() const

Material, elevation, and adaptive layout tokens.

QColor themeBackdrop(bool active) const

Window-chrome backdrop color for the given activation state.

virtual void onThemeUpdated()

Called after the global theme changes.

Enumerations

enum Theme

Global visual theme used when resolving design tokens.

  • Light = 0
  • Dark = 1
  • HighContrast = 2

Types and aliases

struct Colors

Design 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 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