QPainter subclass used internally. More...

#include <qcustomplot.h>

Inheritance diagram for QCPPainter:

Public Types
enum	PainterMode { pmDefault = 0x00 , pmVectorized = 0x01 , pmNoCaching = 0x02 , pmNonCosmetic = 0x04 }
	Defines special modes the painter can operate in. More...

Public Member Functions
	QCPPainter ()
	Creates a new QCPPainter instance and sets default values.

	QCPPainter (QPaintDevice *device)
	Creates a new QCPPainter instance on the specified paint device and sets default values.

	~QCPPainter ()

bool	antialiasing () const

PainterModes	modes () const

void	setAntialiasing (bool enabled)
	Sets whether painting uses antialiasing or not.

void	setMode (PainterMode mode, bool enabled=true)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.Sets the mode of the painter.

void	setModes (PainterModes modes)
	Sets the mode of the painter.

bool	begin (QPaintDevice *device)
	Sets the QPainter::NonCosmeticDefaultPen in Qt versions before Qt5 after beginning painting on device.

void	setPen (const QPen &pen)
	Sets the pen of the painter and applies certain fixes to it, depending on the mode of this QCPPainter.

void	setPen (const QColor &color)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.Sets the pen (by color) of the painter and applies certain fixes to it, depending on the mode of this QCPPainter.

void	setPen (Qt::PenStyle penStyle)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.Sets the pen (by style) of the painter and applies certain fixes to it, depending on the mode of this QCPPainter.

void	drawLine (const QLineF &line)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.Works around a Qt bug introduced with Qt 4.8 which makes drawing QLineF unpredictable when antialiasing is disabled.

void	drawLine (const QPointF &p1, const QPointF &p2)

void	save ()
	Saves the painter (see QPainter::save).

void	restore ()
	Restores the painter (see QPainter::restore).

void	makeNonCosmetic ()
	Changes the pen width to 1 if it currently is 0.

Protected Attributes
PainterModes	mModes

bool	mIsAntialiasing

QStack< bool >	mAntialiasingStack

Detailed Description

QPainter subclass used internally.

This QPainter subclass is used to provide some extended functionality e.g. for tweaking position consistency between antialiased and non-antialiased painting. Further it provides workarounds for QPainter quirks.

Warning: This class intentionally hides non-virtual functions of QPainter, e.g. setPen, save and restore. So while it is possible to pass a QCPPainter instance to a function that expects a QPainter pointer, some of the workarounds and tweaks will be unavailable to the function (because it will call the base class implementations of the functions actually hidden by QCPPainter).

Definition at line 311 of file qcustomplot.h.

Member Enumeration Documentation

◆ PainterMode

enum QCPPainter::PainterMode

Defines special modes the painter can operate in.

They disable or enable certain subsets of features/fixes/workarounds, depending on whether they are wanted on the respective output device.

Enumerator
pmDefault	`0x00` Default mode for painting on screen devices
pmVectorized	`0x01` Mode for vectorized painting (e.g. PDF export). For example, this prevents some antialiasing fixes.
pmNoCaching	`0x02` Mode for all sorts of exports (e.g. PNG, PDF,...). For example, this prevents using cached pixmap labels
pmNonCosmetic	`0x04` Turns pen widths 0 to 1, i.e. disables cosmetic pens. (A cosmetic pen is always drawn with width 1 pixel in the vector image/pdf viewer, independent of zoom.)

Definition at line 319 of file qcustomplot.h.

Constructor & Destructor Documentation

◆ QCPPainter() [1/2]

QCPPainter::QCPPainter ( )

Creates a new QCPPainter instance and sets default values.

Definition at line 51 of file qcustomplot.cpp.

◆ QCPPainter() [2/2]

QCPPainter::QCPPainter ( QPaintDevice * device )

Creates a new QCPPainter instance on the specified paint device and sets default values.

Just like the analogous QPainter constructor, begins painting on device immediately.

Like begin, this method sets QPainter::NonCosmeticDefaultPen in Qt versions before Qt5.

Definition at line 66 of file qcustomplot.cpp.

◆ ~QCPPainter()

QCPPainter::~QCPPainter ( )

Definition at line 77 of file qcustomplot.cpp.

Member Function Documentation

◆ antialiasing()

bool QCPPainter::antialiasing ( ) const

inline

Definition at line 332 of file qcustomplot.h.

◆ begin()

bool QCPPainter::begin ( QPaintDevice * device )

Sets the QPainter::NonCosmeticDefaultPen in Qt versions before Qt5 after beginning painting on device.

This is necessary to get cosmetic pen consistency across Qt versions, because since Qt5, all pens are non-cosmetic by default, and in Qt4 this render hint must be set to get that behaviour.

The Constructor QCPPainter(QPaintDevice *device) which directly starts painting also sets the render hint as appropriate.

Note: this function hides the non-virtual base class implementation.

Definition at line 180 of file qcustomplot.cpp.

◆ drawLine() [1/2]

void QCPPainter::drawLine ( const QLineF & line )

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.Works around a Qt bug introduced with Qt 4.8 which makes drawing QLineF unpredictable when antialiasing is disabled.

Thus when antialiasing is disabled, it rounds the line to integer coordinates and then passes it to the original drawLine.

Note: this function hides the non-virtual base class implementation.

Definition at line 130 of file qcustomplot.cpp.

◆ drawLine() [2/2]

void QCPPainter::drawLine	(	const QPointF &	p1,
		const QPointF &	p2
	)

inline

Definition at line 346 of file qcustomplot.h.

◆ makeNonCosmetic()

void QCPPainter::makeNonCosmetic ( )

Changes the pen width to 1 if it currently is 0.

This function is called in the setPen overrides when the pmNonCosmetic mode is set.

Definition at line 238 of file qcustomplot.cpp.

◆ modes()

PainterModes QCPPainter::modes ( ) const

inline

Definition at line 333 of file qcustomplot.h.

◆ restore()

void QCPPainter::restore ( )

Restores the painter (see QPainter::restore).

Since QCPPainter adds some new internal state to QPainter, the save/restore functions are reimplemented to also save/restore those members.

Note: this function hides the non-virtual base class implementation.

See also: save

Definition at line 225 of file qcustomplot.cpp.

◆ save()

void QCPPainter::save ( )

Saves the painter (see QPainter::save).

Since QCPPainter adds some new internal state to QPainter, the save/restore functions are reimplemented to also save/restore those members.

Note: this function hides the non-virtual base class implementation.

See also: restore

Definition at line 211 of file qcustomplot.cpp.

◆ setAntialiasing()

void QCPPainter::setAntialiasing ( bool enabled )

Sets whether painting uses antialiasing or not.

Use this method instead of using setRenderHint with QPainter::Antialiasing directly, as it allows QCPPainter to regain pixel exactness between antialiased and non-antialiased painting (Since Qt < 5.0 uses slightly different coordinate systems for AA/Non-AA painting).

Definition at line 144 of file qcustomplot.cpp.

◆ setMode()

void QCPPainter::setMode	(	QCPPainter::PainterMode	mode,
		bool	enabled = `true`
	)

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.Sets the mode of the painter.

This controls whether the painter shall adjust its fixes/workarounds optimized for certain output devices.

Definition at line 195 of file qcustomplot.cpp.

◆ setModes()

void QCPPainter::setModes ( PainterModes modes )

Sets the mode of the painter.

This controls whether the painter shall adjust its fixes/workarounds optimized for certain output devices.

Definition at line 164 of file qcustomplot.cpp.

◆ setPen() [1/3]

void QCPPainter::setPen ( const QColor & color )

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.Sets the pen (by color) of the painter and applies certain fixes to it, depending on the mode of this QCPPainter.

Note: this function hides the non-virtual base class implementation.

Definition at line 101 of file qcustomplot.cpp.

◆ setPen() [2/3]

void QCPPainter::setPen ( const QPen & pen )

Sets the pen of the painter and applies certain fixes to it, depending on the mode of this QCPPainter.

Note: this function hides the non-virtual base class implementation.

Definition at line 87 of file qcustomplot.cpp.

◆ setPen() [3/3]

void QCPPainter::setPen ( Qt::PenStyle penStyle )

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.Sets the pen (by style) of the painter and applies certain fixes to it, depending on the mode of this QCPPainter.

Note: this function hides the non-virtual base class implementation.

Definition at line 115 of file qcustomplot.cpp.

Member Data Documentation

◆ mAntialiasingStack

QStack<bool> QCPPainter::mAntialiasingStack

protected

Definition at line 359 of file qcustomplot.h.

◆ mIsAntialiasing

bool QCPPainter::mIsAntialiasing

protected

Definition at line 356 of file qcustomplot.h.

◆ mModes

PainterModes QCPPainter::mModes

protected

Definition at line 355 of file qcustomplot.h.

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

icub-main/src/tools/skinManagerGui/qcustomplot.h
icub-main/src/tools/skinManagerGui/qcustomplot.cpp

Public Types

Public Member Functions

Protected Attributes

Detailed Description

Member Enumeration Documentation

◆ PainterMode

Constructor & Destructor Documentation

◆ QCPPainter() [1/2]

◆ QCPPainter() [2/2]

◆ ~QCPPainter()

Member Function Documentation

◆ antialiasing()

◆ begin()

◆ drawLine() [1/2]

◆ drawLine() [2/2]

◆ makeNonCosmetic()

◆ modes()

◆ restore()

◆ save()

◆ setAntialiasing()

◆ setMode()

◆ setModes()

◆ setPen() [1/3]

◆ setPen() [2/3]

◆ setPen() [3/3]

Member Data Documentation

◆ mAntialiasingStack

◆ mIsAntialiasing

◆ mModes