Basic input

ColorPicker

A spectrum surface for picking a color, with RGB, hex, and optional alpha editing.

Example

Usage

RGBA color value

The picker synchronizes spectrum, channel inputs, alpha, and the QColor value.

#include <FluentQt/BasicInput.h>
using namespace fluent::basicinput;

auto* picker = new ColorPicker(this);
picker->setColor(QColor(0, 120, 212, 180));
connect(picker, &ColorPicker::colorChanged,
        this, [](const QColor& color) { /* apply color */ });

import fluentqt

from PySide6.QtGui import QColor

picker = fluentqt.ColorPicker()
picker.setColor(QColor(0, 120, 212, 180))
picker.colorChanged.connect(apply_color)

API

Declaration

`fluent::basicinput::ColorPicker`

Inherits QWidget · FluentElement · QMLPlus

Fluent color picker for RGB, HSV, hex, and optional alpha editing.

Constructors

explicit ColorPicker(QWidget* parent = nullptr)

Properties

QColor color: Currently selected color value.
Read color()Write setColor()Notify colorChanged()
bool alphaEnabled: Whether alpha channel editing is available.
Read alphaEnabled()Write setAlphaEnabled()Notify alphaEnabledChanged()

Methods

QColor color() const: Currently selected color value.
void setColor(const QColor& c): Currently selected color value.
bool alphaEnabled() const: Whether alpha channel editing is available.
void setAlphaEnabled(bool enabled): Whether alpha channel editing is available.
qreal hue() const: HSV state exposed to the internal child widgets.
qreal saturation() const: 0.0 - 1.0
qreal value() const: 0.0 - 1.0
void onThemeUpdated() override: 0.0 - 1.0
void setHueFromBar(qreal h): HSV updates from the hue bar / spectrum.
void setSVFromSpectrum(qreal s, qreal v): 0.0 - 1.0
void setValueFromSlider(int percent): 0-100 → m_v
void setAlphaFromSlider(int alpha): 0-255

Signals

void colorChanged(const QColor& color): Currently selected color value.
void alphaEnabledChanged(bool enabled): Whether alpha channel editing is available.

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.
bool setThemeOverrides(const QJsonObject& overrides): Component-facing token accessors.
QJsonObject themeOverrides() const: Returns this element's authored overrides.
void clearThemeOverrides(): Restores all token fields to global theme defaults.
Colors themeColors() const
const Colors& themeColorsRef() const: Non-copying access to the active color set (for hot paint paths).
FontStyle themeFont(Typography::FontRole role = Typography::FontRole::Body) const
Radius themeRadius() const
Spacing themeSpacing() const
Animation themeAnimation() const
Material::AcrylicToken themeAcrylic() const: Material, elevation, and adaptive layout tokens.
Material::MicaToken themeMica() const
Material::SmokeToken themeSmoke() const
Elevation::ShadowParams themeShadow(Elevation::Level level) const
int themeBreakpoint(Breakpoints::Breakpoint breakpoint = Breakpoints::Breakpoint::Medium) const
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.
struct FontStyle
struct Radius
struct Spacing
struct Animation

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.
QString state() const
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