Scrolling
ScrollBar
A Fluent-styled scrollbar with hover expansion.
Example
Usage
Horizontal and vertical values
Both orientations keep QScrollBar range, page step, and value semantics.
#include <FluentQt/Scrolling.h>
using namespace fluent::scrolling;
auto* horizontalBar = new ScrollBar(Qt::Horizontal, this);
horizontalBar->setRange(0, 1000);
horizontalBar->setPageStep(100);
horizontalBar->setValue(420);
horizontalBar->setOpacity(1.0);
auto* verticalBar = new ScrollBar(Qt::Vertical, this);
verticalBar->setRange(0, 1000);
verticalBar->setPageStep(100);
verticalBar->setValue(420);
verticalBar->setOpacity(1.0);
connect(horizontalBar, &ScrollBar::valueChanged,
verticalBar, [verticalBar, statusLabel](int value) {
verticalBar->setValue(value);
statusLabel->setText(QStringLiteral("Value: %1").arg(value));
});
connect(verticalBar, &ScrollBar::valueChanged,
horizontalBar, [horizontalBar, statusLabel](int value) {
horizontalBar->setValue(value);
statusLabel->setText(QStringLiteral("Value: %1").arg(value));
});import fluentqt
from PySide6.QtCore import Qt
horizontal = fluentqt.ScrollBar(Qt.Orientation.Horizontal)
horizontal.setRange(0, 1000)
horizontal.setPageStep(100)
horizontal.setValue(420)
horizontal.setOpacity(1.0)
status = fluentqt.Label('Value: 420')
vertical = fluentqt.ScrollBar(Qt.Orientation.Vertical)
vertical.setRange(0, 1000)
vertical.setPageStep(100)
vertical.setValue(420)
vertical.setOpacity(1.0)
def sync_vertical(value):
vertical.setValue(value)
status.setText(f'Value: {value}')
def sync_horizontal(value):
horizontal.setValue(value)
status.setText(f'Value: {value}')
horizontal.valueChanged.connect(sync_vertical)
vertical.valueChanged.connect(sync_horizontal)API
DeclarationNo matching API members.
fluent::scrolling::ScrollBar
Inherits QScrollBar · FluentElement · QMLPlus
Fluent scrollbar with custom thickness and opacity animation.
Constructors
Properties
int thicknessScrollbar thickness in pixels.
Readthickness()WritesetThickness()NotifythicknessChanged()qreal opacityCurrent scrollbar opacity used by fade animation.
Readopacity()WritesetOpacity()
Methods
int thickness() constScrollbar thickness in pixels.
void setThickness(int thickness)Scrollbar thickness in pixels.
qreal opacity() constCurrent scrollbar opacity used by fade animation.
void setOpacity(qreal value)Current scrollbar opacity used by fade animation.
Signals
void thicknessChanged()Scrollbar thickness in pixels.
Destructors
Subclass interfaces
Methods
QSize sizeHint() const overrideSize hint: thickness from the property, length from QScrollBar defaults.
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：QScrollBar