#include <abstractdiagram.h>

Inheritance diagram for PerceptualColor::AbstractDiagram:

[legend]

Public Member Functions
Q_INVOKABLE	AbstractDiagram (QWidget *parent=nullptr)

virtual	~AbstractDiagram () noexcept override

Public Member Functions inherited from QWidget
	QWidget (QWidget *parent, Qt::WindowFlags f)

bool	acceptDrops () const const

QString	accessibleDescription () const const

QString	accessibleName () const const

QList< QAction * >	actions () const const

void	activateWindow ()

QAction *	addAction (const QIcon &icon, const QString &text)

QAction *	addAction (const QIcon &icon, const QString &text, Args &&... args)

QAction *	addAction (const QIcon &icon, const QString &text, const QKeySequence &shortcut)

QAction *	addAction (const QIcon &icon, const QString &text, const QKeySequence &shortcut, Args &&... args)

QAction *	addAction (const QIcon &icon, const QString &text, const QKeySequence &shortcut, const QObject receiver, const char member, Qt::ConnectionType type)

QAction *	addAction (const QIcon &icon, const QString &text, const QObject receiver, const char member, Qt::ConnectionType type)

QAction *	addAction (const QString &text)

QAction *	addAction (const QString &text, Args &&... args)

QAction *	addAction (const QString &text, const QKeySequence &shortcut)

QAction *	addAction (const QString &text, const QKeySequence &shortcut, Args &&... args)

QAction *	addAction (const QString &text, const QKeySequence &shortcut, const QObject receiver, const char member, Qt::ConnectionType type)

QAction *	addAction (const QString &text, const QObject receiver, const char member, Qt::ConnectionType type)

void	addAction (QAction *action)

void	addActions (const QList< QAction * > &actions)

void	adjustSize ()

bool	autoFillBackground () const const

QPalette::ColorRole	backgroundRole () const const

QBackingStore *	backingStore () const const

QSize	baseSize () const const

QWidget *	childAt (const QPoint &p) const const

QWidget *	childAt (int x, int y) const const

QRect	childrenRect () const const

QRegion	childrenRegion () const const

void	clearFocus ()

void	clearMask ()

bool	close ()

QMargins	contentsMargins () const const

QRect	contentsRect () const const

Qt::ContextMenuPolicy	contextMenuPolicy () const const

QCursor	cursor () const const

void	customContextMenuRequested (const QPoint &pos)

WId	effectiveWinId () const const

void	ensurePolished () const const

Qt::FocusPolicy	focusPolicy () const const

QWidget *	focusProxy () const const

QWidget *	focusWidget () const const

const QFont &	font () const const

QFontInfo	fontInfo () const const

QFontMetrics	fontMetrics () const const

QPalette::ColorRole	foregroundRole () const const

QRect	frameGeometry () const const

QSize	frameSize () const const

const QRect &	geometry () const const

QPixmap	grab (const QRect &rectangle)

void	grabGesture (Qt::GestureType gesture, Qt::GestureFlags flags)

void	grabKeyboard ()

void	grabMouse ()

void	grabMouse (const QCursor &cursor)

int	grabShortcut (const QKeySequence &key, Qt::ShortcutContext context)

QGraphicsEffect *	graphicsEffect () const const

QGraphicsProxyWidget *	graphicsProxyWidget () const const

bool	hasEditFocus () const const

bool	hasFocus () const const

virtual bool	hasHeightForWidth () const const

bool	hasMouseTracking () const const

bool	hasTabletTracking () const const

int	height () const const

virtual int	heightForWidth (int w) const const

void	hide ()

Qt::InputMethodHints	inputMethodHints () const const

virtual QVariant	inputMethodQuery (Qt::InputMethodQuery query) const const

void	insertAction (QAction before, QAction action)

void	insertActions (QAction before, const QList< QAction > &actions)

bool	isActiveWindow () const const

bool	isAncestorOf (const QWidget *child) const const

bool	isEnabled () const const

bool	isEnabledTo (const QWidget *ancestor) const const

bool	isFullScreen () const const

bool	isHidden () const const

bool	isMaximized () const const

bool	isMinimized () const const

bool	isModal () const const

bool	isTopLevel () const const

bool	isVisible () const const

bool	isVisibleTo (const QWidget *ancestor) const const

bool	isWindow () const const

bool	isWindowModified () const const

QLayout *	layout () const const

Qt::LayoutDirection	layoutDirection () const const

QLocale	locale () const const

void	lower ()

QPoint	mapFrom (const QWidget *parent, const QPoint &pos) const const

QPointF	mapFrom (const QWidget *parent, const QPointF &pos) const const

QPoint	mapFromGlobal (const QPoint &pos) const const

QPointF	mapFromGlobal (const QPointF &pos) const const

QPoint	mapFromParent (const QPoint &pos) const const

QPointF	mapFromParent (const QPointF &pos) const const

QPoint	mapTo (const QWidget *parent, const QPoint &pos) const const

QPointF	mapTo (const QWidget *parent, const QPointF &pos) const const

QPoint	mapToGlobal (const QPoint &pos) const const

QPointF	mapToGlobal (const QPointF &pos) const const

QPoint	mapToParent (const QPoint &pos) const const

QPointF	mapToParent (const QPointF &pos) const const

QRegion	mask () const const

int	maximumHeight () const const

QSize	maximumSize () const const

int	maximumWidth () const const

int	minimumHeight () const const

QSize	minimumSize () const const

virtual QSize	minimumSizeHint () const const

int	minimumWidth () const const

void	move (const QPoint &)

void	move (int x, int y)

QWidget *	nativeParentWidget () const const

QWidget *	nextInFocusChain () const const

QRect	normalGeometry () const const

void	overrideWindowFlags (Qt::WindowFlags flags)

virtual QPaintEngine *	paintEngine () const const override

const QPalette &	palette () const const

QWidget *	parentWidget () const const

QPoint	pos () const const

QWidget *	previousInFocusChain () const const

	QWIDGETSIZE_MAX QWIDGETSIZE_MAX

void	raise ()

QRect	rect () const const

void	releaseKeyboard ()

void	releaseMouse ()

void	releaseShortcut (int id)

void	removeAction (QAction *action)

void	render (QPaintDevice *target, const QPoint &targetOffset, const QRegion &sourceRegion, RenderFlags renderFlags)

void	render (QPainter *painter, const QPoint &targetOffset, const QRegion &sourceRegion, RenderFlags renderFlags)

void	repaint ()

void	repaint (const QRect &rect)

void	repaint (const QRegion &rgn)

void	repaint (int x, int y, int w, int h)

void	resize (const QSize &)

void	resize (int w, int h)

bool	restoreGeometry (const QByteArray &geometry)

QByteArray	saveGeometry () const const

QScreen *	screen () const const

void	scroll (int dx, int dy)

void	scroll (int dx, int dy, const QRect &r)

void	setAcceptDrops (bool on)

void	setAccessibleDescription (const QString &description)

void	setAccessibleName (const QString &name)

void	setAttribute (Qt::WidgetAttribute attribute, bool on)

void	setAutoFillBackground (bool enabled)

void	setBackgroundRole (QPalette::ColorRole role)

void	setBaseSize (const QSize &)

void	setBaseSize (int basew, int baseh)

void	setContentsMargins (const QMargins &margins)

void	setContentsMargins (int left, int top, int right, int bottom)

void	setContextMenuPolicy (Qt::ContextMenuPolicy policy)

void	setCursor (const QCursor &)

void	setDisabled (bool disable)

void	setEditFocus (bool enable)

void	setEnabled (bool)

void	setFixedHeight (int h)

void	setFixedSize (const QSize &s)

void	setFixedSize (int w, int h)

void	setFixedWidth (int w)

void	setFocus ()

void	setFocus (Qt::FocusReason reason)

void	setFocusPolicy (Qt::FocusPolicy policy)

void	setFocusProxy (QWidget *w)

void	setFont (const QFont &)

void	setForegroundRole (QPalette::ColorRole role)

void	setGeometry (const QRect &)

void	setGeometry (int x, int y, int w, int h)

void	setGraphicsEffect (QGraphicsEffect *effect)

void	setHidden (bool hidden)

void	setInputMethodHints (Qt::InputMethodHints hints)

void	setLayout (QLayout *layout)

void	setLayoutDirection (Qt::LayoutDirection direction)

void	setLocale (const QLocale &locale)

void	setMask (const QBitmap &bitmap)

void	setMask (const QRegion &region)

void	setMaximumHeight (int maxh)

void	setMaximumSize (const QSize &)

void	setMaximumSize (int maxw, int maxh)

void	setMaximumWidth (int maxw)

void	setMinimumHeight (int minh)

void	setMinimumSize (const QSize &)

void	setMinimumSize (int minw, int minh)

void	setMinimumWidth (int minw)

void	setMouseTracking (bool enable)

void	setPalette (const QPalette &)

void	setParent (QWidget *parent)

void	setParent (QWidget *parent, Qt::WindowFlags f)

void	setScreen (QScreen *screen)

void	setShortcutAutoRepeat (int id, bool enable)

void	setShortcutEnabled (int id, bool enable)

void	setSizeIncrement (const QSize &)

void	setSizeIncrement (int w, int h)

void	setSizePolicy (QSizePolicy)

void	setSizePolicy (QSizePolicy::Policy horizontal, QSizePolicy::Policy vertical)

void	setStatusTip (const QString &)

void	setStyle (QStyle *style)

void	setStyleSheet (const QString &styleSheet)

void	setTabletTracking (bool enable)

void	setToolTip (const QString &)

void	setToolTipDuration (int msec)

void	setUpdatesEnabled (bool enable)

void	setupUi (QWidget *widget)

virtual void	setVisible (bool visible)

void	setWhatsThis (const QString &)

void	setWindowFilePath (const QString &filePath)

void	setWindowFlag (Qt::WindowType flag, bool on)

void	setWindowFlags (Qt::WindowFlags type)

void	setWindowIcon (const QIcon &icon)

void	setWindowIconText (const QString &)

void	setWindowModality (Qt::WindowModality windowModality)

void	setWindowModified (bool)

void	setWindowOpacity (qreal level)

void	setWindowRole (const QString &role)

void	setWindowState (Qt::WindowStates windowState)

void	setWindowTitle (const QString &)

void	show ()

void	showFullScreen ()

void	showMaximized ()

void	showMinimized ()

void	showNormal ()

QSize	size () const const

virtual QSize	sizeHint () const const

QSize	sizeIncrement () const const

QSizePolicy	sizePolicy () const const

void	stackUnder (QWidget *w)

QString	statusTip () const const

QStyle *	style () const const

QString	styleSheet () const const

bool	testAttribute (Qt::WidgetAttribute attribute) const const

QString	toolTip () const const

int	toolTipDuration () const const

QWidget *	topLevelWidget () const const

bool	underMouse () const const

void	ungrabGesture (Qt::GestureType gesture)

void	unsetCursor ()

void	unsetLayoutDirection ()

void	unsetLocale ()

void	update ()

void	update (const QRect &rect)

void	update (const QRegion &rgn)

void	update (int x, int y, int w, int h)

void	updateGeometry ()

bool	updatesEnabled () const const

QRegion	visibleRegion () const const

QString	whatsThis () const const

int	width () const const

QWidget *	window () const const

QString	windowFilePath () const const

Qt::WindowFlags	windowFlags () const const

QWindow *	windowHandle () const const

QIcon	windowIcon () const const

void	windowIconChanged (const QIcon &icon)

QString	windowIconText () const const

void	windowIconTextChanged (const QString &iconText)

Qt::WindowModality	windowModality () const const

qreal	windowOpacity () const const

QString	windowRole () const const

Qt::WindowStates	windowState () const const

QString	windowTitle () const const

void	windowTitleChanged (const QString &title)

Qt::WindowType	windowType () const const

WId	winId () const const

int	x () const const

int	y () const const

Public Member Functions inherited from QObject
	QObject (QObject *parent)

QBindable< QString >	bindableObjectName ()

bool	blockSignals (bool block)

const QObjectList &	children () const const

QMetaObject::Connection	connect (const QObject sender, const char signal, const char *method, Qt::ConnectionType type) const const

void	deleteLater ()

void	destroyed (QObject *obj)

bool	disconnect (const char signal, const QObject receiver, const char *method) const const

bool	disconnect (const QObject receiver, const char method) const const

void	dumpObjectInfo () const const

void	dumpObjectTree () const const

QList< QByteArray >	dynamicPropertyNames () const const

virtual bool	eventFilter (QObject watched, QEvent event)

T	findChild (const QString &name, Qt::FindChildOptions options) const const

QList< T >	findChildren (const QRegularExpression &re, Qt::FindChildOptions options) const const

QList< T >	findChildren (const QString &name, Qt::FindChildOptions options) const const

QList< T >	findChildren (Qt::FindChildOptions options) const const

bool	inherits (const char *className) const const

void	installEventFilter (QObject *filterObj)

bool	isQuickItemType () const const

bool	isWidgetType () const const

bool	isWindowType () const const

void	killTimer (int id)

virtual const QMetaObject *	metaObject () const const

void	moveToThread (QThread *targetThread)

QString	objectName () const const

void	objectNameChanged (const QString &objectName)

QObject *	parent () const const

QVariant	property (const char *name) const const

	Q_CLASSINFO (Name, Value)

	Q_EMIT Q_EMIT

	Q_ENUM (...)

	Q_ENUM_NS (...)

	Q_ENUMS (...)

	Q_FLAG (...)

	Q_FLAG_NS (...)

	Q_FLAGS (...)

	Q_GADGET Q_GADGET

	Q_GADGET_EXPORT (EXPORT_MACRO)

	Q_INTERFACES (...)

	Q_INVOKABLE Q_INVOKABLE

	Q_MOC_INCLUDE Q_MOC_INCLUDE

	Q_NAMESPACE Q_NAMESPACE

	Q_NAMESPACE_EXPORT (EXPORT_MACRO)

	Q_OBJECT Q_OBJECT

	Q_PROPERTY (...)

	Q_REVISION Q_REVISION

	Q_SET_OBJECT_NAME (Object)

	Q_SIGNAL Q_SIGNAL

	Q_SIGNALS Q_SIGNALS

	Q_SLOT Q_SLOT

	Q_SLOTS Q_SLOTS

T	qobject_cast (const QObject *object)

T	qobject_cast (QObject *object)

	QT_NO_NARROWING_CONVERSIONS_IN_CONNECT QT_NO_NARROWING_CONVERSIONS_IN_CONNECT

void	removeEventFilter (QObject *obj)

void	setObjectName (const QString &name)

void	setObjectName (QAnyStringView name)

void	setParent (QObject *parent)

bool	setProperty (const char *name, const QVariant &value)

bool	setProperty (const char *name, QVariant &&value)

bool	signalsBlocked () const const

int	startTimer (int interval, Qt::TimerType timerType)

int	startTimer (std::chrono::milliseconds interval, Qt::TimerType timerType)

QThread *	thread () const const

Public Member Functions inherited from QPaintDevice
int	colorCount () const const

int	depth () const const

qreal	devicePixelRatio () const const

qreal	devicePixelRatioF () const const

int	height () const const

int	heightMM () const const

int	logicalDpiX () const const

int	logicalDpiY () const const

bool	paintingActive () const const

int	physicalDpiX () const const

int	physicalDpiY () const const

int	width () const const

int	widthMM () const const

Protected Member Functions
virtual void	actualVisibilityToggledEvent ()

void	callUpdate ()

QColor	focusIndicatorColor () const

int	gradientMinimumLength () const

int	gradientThickness () const

QColor	handleColorFromBackgroundLightness (qreal lightness) const

int	handleOutlineThickness () const

qreal	handleRadius () const

virtual void	hideEvent (QHideEvent *event) override

bool	isActuallyVisible () const

int	maximumPhysicalSquareSize () const

qreal	maximumWidgetSquareSize () const

QSize	physicalPixelSize () const

virtual void	showEvent (QShowEvent *event) override

int	spaceForFocusIndicator () const

QImage	transparencyBackground () const

Protected Member Functions inherited from QWidget
virtual void	actionEvent (QActionEvent *event)

virtual void	changeEvent (QEvent *event)

virtual void	closeEvent (QCloseEvent *event)

virtual void	contextMenuEvent (QContextMenuEvent *event)

void	create (WId window, bool initializeWindow, bool destroyOldWindow)

void	destroy (bool destroyWindow, bool destroySubWindows)

virtual void	dragEnterEvent (QDragEnterEvent *event)

virtual void	dragLeaveEvent (QDragLeaveEvent *event)

virtual void	dragMoveEvent (QDragMoveEvent *event)

virtual void	dropEvent (QDropEvent *event)

virtual void	enterEvent (QEnterEvent *event)

virtual bool	event (QEvent *event) override

virtual void	focusInEvent (QFocusEvent *event)

bool	focusNextChild ()

virtual bool	focusNextPrevChild (bool next)

virtual void	focusOutEvent (QFocusEvent *event)

bool	focusPreviousChild ()

virtual void	initPainter (QPainter *painter) const const override

virtual void	inputMethodEvent (QInputMethodEvent *event)

virtual void	keyPressEvent (QKeyEvent *event)

virtual void	keyReleaseEvent (QKeyEvent *event)

virtual void	leaveEvent (QEvent *event)

virtual int	metric (PaintDeviceMetric m) const const override

virtual void	mouseDoubleClickEvent (QMouseEvent *event)

virtual void	mouseMoveEvent (QMouseEvent *event)

virtual void	mousePressEvent (QMouseEvent *event)

virtual void	mouseReleaseEvent (QMouseEvent *event)

virtual void	moveEvent (QMoveEvent *event)

virtual bool	nativeEvent (const QByteArray &eventType, void message, qintptr result)

virtual void	paintEvent (QPaintEvent *event)

virtual void	resizeEvent (QResizeEvent *event)

virtual void	tabletEvent (QTabletEvent *event)

void	updateMicroFocus (Qt::InputMethodQuery query)

virtual void	wheelEvent (QWheelEvent *event)

Protected Member Functions inherited from QObject
virtual void	childEvent (QChildEvent *event)

virtual void	connectNotify (const QMetaMethod &signal)

virtual void	customEvent (QEvent *event)

virtual void	disconnectNotify (const QMetaMethod &signal)

bool	isSignalConnected (const QMetaMethod &signal) const const

int	receivers (const char *signal) const const

QObject *	sender () const const

int	senderSignalIndex () const const

virtual void	timerEvent (QTimerEvent *event)

Protected Member Functions inherited from QPaintDevice

Additional Inherited Members
Public Types inherited from QWidget
enum	RenderFlag

typedef	RenderFlags

Public Types inherited from QObject
typedef	QObjectList

Public Types inherited from QPaintDevice
enum	PaintDeviceMetric

Properties inherited from QWidget
	acceptDrops

	accessibleDescription

	accessibleName

	autoFillBackground

	baseSize

	childrenRect

	childrenRegion

	contextMenuPolicy

	cursor

	enabled

	focus

	focusPolicy

	font

	frameGeometry

	frameSize

	fullScreen

	geometry

	height

	inputMethodHints

	isActiveWindow

	layoutDirection

	locale

	maximized

	maximumHeight

	maximumSize

	maximumWidth

	minimized

	minimumHeight

	minimumSize

	minimumSizeHint

	minimumWidth

	modal

	mouseTracking

	normalGeometry

	palette

	pos

	rect

	size

	sizeHint

	sizeIncrement

	sizePolicy

	statusTip

	styleSheet

	tabletTracking

	toolTip

	toolTipDuration

	updatesEnabled

	visible

	whatsThis

	width

	windowFilePath

	windowFlags

	windowIcon

	windowIconText

	windowModality

	windowModified

	windowOpacity

	windowTitle

	x

	y

Properties inherited from QObject
	objectName

Static Public Member Functions inherited from QWidget
QWidget *	createWindowContainer (QWindow window, QWidget parent, Qt::WindowFlags flags)

QWidget *	find (WId id)

QWidget *	keyboardGrabber ()

QWidget *	mouseGrabber ()

void	setTabOrder (QWidget first, QWidget second)

void	setTabOrder (std::initializer_list< QWidget * > widgets)

Static Public Member Functions inherited from QObject
QMetaObject::Connection	connect (const QObject sender, const char signal, const QObject receiver, const char method, Qt::ConnectionType type)

QMetaObject::Connection	connect (const QObject sender, const QMetaMethod &signal, const QObject receiver, const QMetaMethod &method, Qt::ConnectionType type)

QMetaObject::Connection	connect (const QObject sender, PointerToMemberFunction signal, const QObject context, Functor functor, Qt::ConnectionType type)

QMetaObject::Connection	connect (const QObject sender, PointerToMemberFunction signal, const QObject receiver, PointerToMemberFunction method, Qt::ConnectionType type)

QMetaObject::Connection	connect (const QObject *sender, PointerToMemberFunction signal, Functor functor)

bool	disconnect (const QMetaObject::Connection &connection)

bool	disconnect (const QObject sender, const char signal, const QObject receiver, const char method)

bool	disconnect (const QObject sender, const QMetaMethod &signal, const QObject receiver, const QMetaMethod &method)

bool	disconnect (const QObject sender, PointerToMemberFunction signal, const QObject receiver, PointerToMemberFunction method)

QString	tr (const char sourceText, const char disambiguation, int n)

Public Attributes inherited from QWidget
	DrawChildren

	DrawWindowBackground

	IgnoreMask

Public Attributes inherited from QPaintDevice
	PdmDepth

	PdmDevicePixelRatio

	PdmDevicePixelRatioScaled

	PdmDpiX

	PdmDpiY

	PdmHeight

	PdmHeightMM

	PdmNumColors

	PdmPhysicalDpiX

	PdmPhysicalDpiY

	PdmWidth

	PdmWidthMM

Detailed Description

Base class for LCH diagrams.

Provides some elements that are common for all LCH diagrams in this library.

Definition at line 58 of file abstractdiagram.h.

Constructor & Destructor Documentation

◆ AbstractDiagram()

PerceptualColor::AbstractDiagram::AbstractDiagram ( QWidget * parent = nullptr )

explicit

The constructor.

Parameters

parent The widget’s parent widget. This parameter will be passed to the base class’s constructor.

Definition at line 28 of file abstractdiagram.cpp.

◆ ~AbstractDiagram()

PerceptualColor::AbstractDiagram::~AbstractDiagram ( )

overridevirtualnoexcept

Default destructor.

Destructor.

Definition at line 35 of file abstractdiagram.cpp.

Member Function Documentation

◆ actualVisibilityToggledEvent()

void PerceptualColor::AbstractDiagram::actualVisibilityToggledEvent ( )

protectedvirtual

Event occurring after isActuallyVisible has been toggled.

This function is called if and only if isActuallyVisible has actually been toggled.

Definition at line 275 of file abstractdiagram.cpp.

◆ callUpdate()

void PerceptualColor::AbstractDiagram::callUpdate ( )

protected

An alternative to QWidget::update().

It’s a workaround that avoids trouble with overload resolution.

Connecting a signal to the slot QWidget::update() is surprisingly difficult, at least if you want to use the functor syntax (which provides compile-time checks) for the connection. A simple connection fails to compile because it fails to do a correct overload resolution, as there is more than one slot called update. Now, qOverload<>() can be used to choose the correct overload, but in this special case, qOverload<>() generates compiler warnings.

Instead of connecting to QWidget::update() directly, simply connect to this slot instead. It calls the actual QWidget::update(), but avoids the annoyance with the overload resolution

Definition at line 335 of file abstractdiagram.cpp.

◆ focusIndicatorColor()

QColor PerceptualColor::AbstractDiagram::focusIndicatorColor ( ) const

nodiscardprotected

The color for painting focus indicators.

Returns: The color for painting focus indicators. This color is based on the current widget style at the moment this function is called. The value might therefore be different on the next function call, if the widget style has been switched by the user in the meantime.

Note: As there is no build-in support in Qt to get this information, we have to do some best guess, which might go wrong on some styles.

Definition at line 46 of file abstractdiagram.cpp.

◆ gradientMinimumLength()

int PerceptualColor::AbstractDiagram::gradientMinimumLength ( ) const

nodiscardprotected

The minimum length of a color gradient.

This is the minimum length of a one-dimensional gradient, for example in a slider or a color wheel. This is also the minimum width and minimum height of two-dimensional gradients.

Returns: The length of a gradient, measured in device-independent pixels.

See also: gradientThickness()

Definition at line 209 of file abstractdiagram.cpp.

◆ gradientThickness()

int PerceptualColor::AbstractDiagram::gradientThickness ( ) const

nodiscardprotected

The thickness of a color gradient.

This is the thickness of a one-dimensional gradient, for example in a slider or a color wheel.

Returns: The thickness of a slider or a color wheel, measured in device-independent pixels.

See also: gradientMinimumLength()

Definition at line 184 of file abstractdiagram.cpp.

◆ handleColorFromBackgroundLightness()

QColor PerceptualColor::AbstractDiagram::handleColorFromBackgroundLightness ( qreal lightness ) const

nodiscardprotected

An appropriate color for a handle, depending on the background lightness.

Parameters

lightness The background lightness. Valid range: [0, 100].

Returns: An appropriate color for a handle. This color will provide contrast to the background.

Definition at line 244 of file abstractdiagram.cpp.

◆ handleOutlineThickness()

int PerceptualColor::AbstractDiagram::handleOutlineThickness ( ) const

nodiscardprotected

The outline thickness of a handle.

Returns: The outline thickness of a (either circular or linear) handle. Measured in device-independent pixels.

Note: The return value is constant. For a given object instance, this function returns the same value every time it is called. This constant value may be different for different instances of the object.

Definition at line 156 of file abstractdiagram.cpp.

◆ handleRadius()

qreal PerceptualColor::AbstractDiagram::handleRadius ( ) const

nodiscardprotected

The radius of a circular handle.

Returns: The radius of a circular handle, measured in device-independent pixels.

Note: The return value is constant. For a given object instance, this function returns the same value every time it is called. This constant value may be different for different instances of the object.

Definition at line 167 of file abstractdiagram.cpp.

◆ hideEvent()

void PerceptualColor::AbstractDiagram::hideEvent ( QHideEvent * event )

overrideprotectedvirtual

React on a hide event.

Reimplemented from base class.

Parameters

event The hide event.

Reimplemented from QWidget.

Definition at line 306 of file abstractdiagram.cpp.

◆ isActuallyVisible()

bool PerceptualColor::AbstractDiagram::isActuallyVisible ( ) const

nodiscardprotected

If this widget is actually visible.

Unlike QWidget::isVisible, minimized windows are not considered visible.

Changes can be observed with AbstractDiagram::actualVisibilityToggledEvent.

Returns: If this widget is actually visible.

Definition at line 266 of file abstractdiagram.cpp.

◆ maximumPhysicalSquareSize()

int PerceptualColor::AbstractDiagram::maximumPhysicalSquareSize ( ) const

nodiscardprotected

The maximum possible size of a square within the widget, measured in physical pixels.

This is the shorter value of width and height of the widget.

Returns: The maximum possible size of a square within the widget, measured in physical pixels. Both, width and height are guaranteed to be ≥ 0.

See also: maximumWidgetSquareSize

Definition at line 103 of file abstractdiagram.cpp.

◆ maximumWidgetSquareSize()

qreal PerceptualColor::AbstractDiagram::maximumWidgetSquareSize ( ) const

nodiscardprotected

The maximum possible size of a square within the widget, measured in device-independent pixels.

This is the conversion of maximumPhysicalSquareSize to the unit device-independent pixels. It might be smaller than the shortest value of QWidget::width() and QWidget::height() because maximumPhysicalSquareSize might have rounded down.

Returns: The maximum possible size of a square within the widget, measured in device-independent pixels.

Definition at line 119 of file abstractdiagram.cpp.

◆ physicalPixelSize()

QSize PerceptualColor::AbstractDiagram::physicalPixelSize ( ) const

nodiscardprotected

The rounded size of the widget measured in physical pixels.

Returns: The rounded size of this widget, measured in physical pixels, based on QPaintDevice::devicePixelRatioF(). This is the recommended image size for calling QPainter::drawImage() during a paint event. Both, width and height are guaranteed to be ≥ 0.

Example: You want to prepare a QImage of the hole widget to be used in QWidget::paintEvent(). To make sure a crisp rendering, you have to

Prepare an image with the size that this function returns.
Set QImage::setDevicePixelRatio() of the image to the same value as QPaintDevice::devicePixelRatioF() of the widget.
Actually paint the image on the widget at position (0, 0) without anti-aliasing.

Note: If QPaintDevice::devicePixelRatioF() is not an integer, the result of this function is rounded down. Qt’s widget geometry code has no documentation about how this is handled. However, Qt seems to round up starting with 0.5, at least on Linux/X11. But there are a few themes (for example the “Kvantum style engine” with the style “MildGradientKvantum”) that seem to round down: This becomes visible, as the corresponding last physical pixels are not automatically redrawn before executing the paintEvent() code. To avoid relying on undocumented behaviour and to avoid known problems with some styles, this function is conservative and always rounds down.

Definition at line 80 of file abstractdiagram.cpp.

◆ showEvent()

void PerceptualColor::AbstractDiagram::showEvent ( QShowEvent * event )

overrideprotectedvirtual

React on a show event.

Reimplemented from base class.

Parameters

event The show event.

Reimplemented from QWidget.

Definition at line 288 of file abstractdiagram.cpp.

◆ spaceForFocusIndicator()

int PerceptualColor::AbstractDiagram::spaceForFocusIndicator ( ) const

nodiscardprotected

The empty space around diagrams reserved for the focus indicator.

Measured in device-independent pixels.

Returns: The empty space around diagrams reserved for the focus indicator.

Definition at line 231 of file abstractdiagram.cpp.

◆ transparencyBackground()

QImage PerceptualColor::AbstractDiagram::transparencyBackground ( ) const

nodiscardprotected

Background for semi-transparent colors.

When showing a semi-transparent color, there has to be a background on which it is shown. This function provides a suitable background for showcasing a color.

Example code (to use within a class that inherits from PerceptualColor::AbstractDiagram):

        // Within a class derived from AbstractDiagram, you can use this code:
 
        QImage myImage(150, 200, QImage::Format_ARGB32_Premultiplied);
 
        QPainter myPainter(&myImage);
 
        // Fill the hole image with tiles made of transparencyBackground()
        myPainter.fillRect(0,
                           0,
                           150,
                           200,
                           // During painting, QBrush will ignore the
                           // device pixel ratio of the underlying
                           // transparencyBackground image!
                           QBrush(transparencyBackground()));
 
        // Paint semi-transparent red color above
        myPainter.fillRect(0, 0, 150, 200, QBrush(QColor(255, 0, 0, 128)));

Returns: An image of a mosaic of neutral gray rectangles of different lightness. You can use this as tiles to paint a background.

Note: The image is considering QWidget::devicePixelRatioF() to deliver crisp (correctly scaled) images also for high-DPI devices. The painting does not use floating point drawing, but rounds to full integers. Therefore, the result is always a sharp image. This function takes care that each square has the same physical pixel size, without scaling errors or anti-aliasing errors.

Definition at line 147 of file abstractdiagram.cpp.

The documentation for this class was generated from the following files:

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About Perceptual Color

PerceptualColor::AbstractDiagram

Public Member Functions

Protected Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ AbstractDiagram()

◆ ~AbstractDiagram()

Member Function Documentation

◆ actualVisibilityToggledEvent()

◆ callUpdate()

◆ focusIndicatorColor()

◆ gradientMinimumLength()

◆ gradientThickness()

◆ handleColorFromBackgroundLightness()

◆ handleOutlineThickness()

◆ handleRadius()

◆ hideEvent()

◆ isActuallyVisible()

◆ maximumPhysicalSquareSize()

◆ maximumWidgetSquareSize()

◆ physicalPixelSize()

◆ showEvent()

◆ spaceForFocusIndicator()

◆ transparencyBackground()