An alternative canvas for a QwtPlot derived from QOpenGLWidget. More...

#include <qwt_plot_opengl_canvas.h>

Inheritance diagram for QwtPlotOpenGLCanvas:

[legend]

Classes
class	PrivateData

Public Slots
void	replot ()

Public Member Functions
Q_INVOKABLE QPainterPath	borderPath (const QRect &) const

virtual bool	event (QEvent *) QWT_OVERRIDE

virtual Q_INVOKABLE void	invalidateBackingStore () QWT_OVERRIDE
	Invalidate the internal backing store. More...

	QwtPlotOpenGLCanvas (int samples, QwtPlot *=NULL)
	Constructor. More...

	QwtPlotOpenGLCanvas (QwtPlot *=NULL)
	Constructor. More...

virtual	~QwtPlotOpenGLCanvas ()
	Destructor. More...

Public Member Functions inherited from QwtPlotAbstractGLCanvas
QRect	frameRect () const

QFrame::Shadow	frameShadow () const

QFrame::Shape	frameShape () const

int	frameStyle () const

int	frameWidth () const

int	lineWidth () const

int	midLineWidth () const

	QwtPlotAbstractGLCanvas (QWidget *canvasWidget)
	Paint attributes. More...

void	setFrameShadow (QFrame::Shadow)

void	setFrameShape (QFrame::Shape)

void	setFrameStyle (int style)

void	setLineWidth (int)

void	setMidLineWidth (int)

void	setPaintAttribute (PaintAttribute, bool on=true)
	Changing the paint attributes. More...

bool	testPaintAttribute (PaintAttribute) const

virtual	~QwtPlotAbstractGLCanvas ()
	Destructor. More...

Public Member Functions inherited from QwtPlotAbstractCanvas
double	borderRadius () const

FocusIndicator	focusIndicator () const

QwtPlot *	plot ()
	Return parent plot widget. More...

const QwtPlot *	plot () const

	QwtPlotAbstractCanvas (QWidget *canvasWidget)
	Constructor. More...

void	setBorderRadius (double)

void	setFocusIndicator (FocusIndicator)

virtual	~QwtPlotAbstractCanvas ()
	Destructor. More...

Protected Member Functions
virtual void	initializeGL () QWT_OVERRIDE
	No operation - reserved for some potential use in the future. More...

virtual void	paintEvent (QPaintEvent *) QWT_OVERRIDE

virtual void	paintGL () QWT_OVERRIDE
	Paint the plot. More...

virtual void	resizeGL (int width, int height) QWT_OVERRIDE
	No operation - reserved for some potential use in the future. More...

Protected Member Functions inherited from QwtPlotAbstractGLCanvas
void	draw (QPainter *)
	Helper function for the derived plot canvas. More...

void	replot ()

Protected Member Functions inherited from QwtPlotAbstractCanvas
QPainterPath	canvasBorderPath (const QRect &rect) const

QWidget *	canvasWidget ()

const QWidget *	canvasWidget () const

virtual void	drawBackground (QPainter *)
	Helper function for the derived plot canvas. More...

virtual void	drawBorder (QPainter *)

void	drawCanvas (QPainter *)
	Draw the plot to the canvas. More...

virtual void	drawFocusIndicator (QPainter *)

void	drawStyled (QPainter *, bool)
	Helper function for the derived plot canvas. More...

void	drawUnstyled (QPainter *)
	Helper function for the derived plot canvas. More...

void	fillBackground (QPainter *)
	Helper function for the derived plot canvas. More...

void	updateStyleSheetInfo ()
	Update the cached information about the current style sheet. More...

Properties
double	borderRadius

QRect	frameRect

QFrame::Shadow	frameShadow

QFrame::Shape	frameShape

int	frameWidth

int	lineWidth

int	midLineWidth

Private Member Functions
virtual void	clearBackingStore () QWT_OVERRIDE

void	init ()

Private Attributes
PrivateData *	m_data

Additional Inherited Members
Public Types inherited from QwtPlotAbstractGLCanvas
enum	PaintAttribute { BackingStore = 1, ImmediatePaint = 8 }
	Paint attributes. More...

Public Types inherited from QwtPlotAbstractCanvas
enum	FocusIndicator { NoFocusIndicator, CanvasFocusIndicator, ItemFocusIndicator }
	Focus indicator The default setting is NoFocusIndicator. More...

Detailed Description

An alternative canvas for a QwtPlot derived from QOpenGLWidget.

Even if QwtPlotOpenGLCanvas is not derived from QFrame it imitates its API. When using style sheets it supports the box model - beside backgrounds with rounded borders.

See also: QwtPlot::setCanvas(), QwtPlotCanvas, QwtPlotCanvas::OpenGLBuffer

Note: Another way for getting hardware accelerated graphics is using an OpenGL offscreen buffer ( QwtPlotCanvas::OpenGLBuffer ) with QwtPlotCanvas. Performance is worse, than rendering straight to a QOpenGLWidget, but is usually better integrated into a desktop application.

Definition at line 34 of file qwt_plot_opengl_canvas.h.

Constructor & Destructor Documentation

◆ QwtPlotOpenGLCanvas() [1/2]

QwtPlotOpenGLCanvas::QwtPlotOpenGLCanvas ( QwtPlot * plot = NULL )

explicit

Constructor.

Parameters

plot	Parent plot widget

See also: QwtPlot::setCanvas()

Definition at line 49 of file qwt_plot_opengl_canvas.cpp.

◆ QwtPlotOpenGLCanvas() [2/2]

QwtPlotOpenGLCanvas::QwtPlotOpenGLCanvas	(	int	numSamples,
		QwtPlot *	plot = `NULL`
	)

explicit

Constructor.

Parameters

int	Number of samples, see QSurfaceFormat::samples()
plot	Parent plot widget

See also: QwtPlot::setCanvas()

Definition at line 63 of file qwt_plot_opengl_canvas.cpp.

◆ ~QwtPlotOpenGLCanvas()

QwtPlotOpenGLCanvas::~QwtPlotOpenGLCanvas ( )

virtual

Destructor.

Definition at line 94 of file qwt_plot_opengl_canvas.cpp.

Member Function Documentation

◆ borderPath()

QPainterPath QwtPlotOpenGLCanvas::borderPath ( const QRect & rect ) const

Calculate the painter path for a styled or rounded border

When the canvas has no styled background or rounded borders the painter path is empty.

Parameters

rect	Bounding rectangle of the canvas

Returns: Painter path, that can be used for clipping

Definition at line 185 of file qwt_plot_opengl_canvas.cpp.

◆ clearBackingStore()

void QwtPlotOpenGLCanvas::clearBackingStore ( )

privatevirtual

Implements QwtPlotAbstractGLCanvas.

Definition at line 170 of file qwt_plot_opengl_canvas.cpp.

◆ event()

bool QwtPlotOpenGLCanvas::event ( QEvent * event )

virtual

Qt event handler for QEvent::PolishRequest and QEvent::StyleChange

Parameters

event Qt Event

Returns: See QGLWidget::event()

Definition at line 116 of file qwt_plot_opengl_canvas.cpp.

◆ init()

void QwtPlotOpenGLCanvas::init ( )

private

Definition at line 80 of file qwt_plot_opengl_canvas.cpp.

◆ initializeGL()

void QwtPlotOpenGLCanvas::initializeGL ( )

protectedvirtual

No operation - reserved for some potential use in the future.

Definition at line 191 of file qwt_plot_opengl_canvas.cpp.

◆ invalidateBackingStore()

void QwtPlotOpenGLCanvas::invalidateBackingStore ( )

virtual

Invalidate the internal backing store.

Implements QwtPlotAbstractGLCanvas.

Definition at line 165 of file qwt_plot_opengl_canvas.cpp.

◆ paintEvent()

void QwtPlotOpenGLCanvas::paintEvent ( QPaintEvent * event )

protectedvirtual

Paint event

Parameters

event Paint event

See also: QwtPlot::drawCanvas()

Definition at line 105 of file qwt_plot_opengl_canvas.cpp.

◆ paintGL()

void QwtPlotOpenGLCanvas::paintGL ( )

protectedvirtual

Paint the plot.

Definition at line 196 of file qwt_plot_opengl_canvas.cpp.

◆ replot

void QwtPlotOpenGLCanvas::replot ( )

slot

Invalidate the paint cache and repaint the canvas

See also: invalidatePaintCache()

Definition at line 159 of file qwt_plot_opengl_canvas.cpp.

◆ resizeGL()

void QwtPlotOpenGLCanvas::resizeGL	(	int	width,
		int	height
	)

protectedvirtual

No operation - reserved for some potential use in the future.

Definition at line 270 of file qwt_plot_opengl_canvas.cpp.

Member Data Documentation

◆ m_data

PrivateData* QwtPlotOpenGLCanvas::m_data

private

Definition at line 71 of file qwt_plot_opengl_canvas.h.

Property Documentation

◆ borderRadius

double QwtPlotOpenGLCanvas::borderRadius

readwrite

Definition at line 45 of file qwt_plot_opengl_canvas.h.

◆ frameRect

QRect QwtPlotOpenGLCanvas::frameRect

read

Definition at line 43 of file qwt_plot_opengl_canvas.h.

◆ frameShadow

QFrame::Shadow QwtPlotOpenGLCanvas::frameShadow

readwrite

Definition at line 38 of file qwt_plot_opengl_canvas.h.

◆ frameShape

QFrame::Shape QwtPlotOpenGLCanvas::frameShape

readwrite

Definition at line 39 of file qwt_plot_opengl_canvas.h.

◆ frameWidth

int QwtPlotOpenGLCanvas::frameWidth

read

Definition at line 42 of file qwt_plot_opengl_canvas.h.

◆ lineWidth

int QwtPlotOpenGLCanvas::lineWidth

readwrite

Definition at line 40 of file qwt_plot_opengl_canvas.h.

◆ midLineWidth

int QwtPlotOpenGLCanvas::midLineWidth

readwrite

Definition at line 41 of file qwt_plot_opengl_canvas.h.

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

Classes

Public Slots

Public Member Functions

Protected Member Functions

Properties

Private Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ QwtPlotOpenGLCanvas() [1/2]

◆ QwtPlotOpenGLCanvas() [2/2]

◆ ~QwtPlotOpenGLCanvas()

Member Function Documentation

◆ borderPath()

◆ clearBackingStore()

◆ event()

◆ init()

◆ initializeGL()

◆ invalidateBackingStore()

◆ paintEvent()

◆ paintGL()

◆ replot

◆ resizeGL()

Member Data Documentation

◆ m_data

Property Documentation

◆ borderRadius

◆ frameRect

◆ frameShadow

◆ frameShape

◆ frameWidth

◆ lineWidth

◆ midLineWidth