QwtPlotCanvas Class Reference

Canvas of a QwtPlot. More...

#include <qwt_plot_canvas.h>

Inheritance diagram for QwtPlotCanvas:

Classes
class	PrivateData

Public Types
enum	PaintAttribute { BackingStore = 1 , Opaque = 2 , HackStyledBackground = 4 , ImmediatePaint = 8 }
	Paint attributes. More...
Public Types inherited from QwtPlotAbstractCanvas
enum	FocusIndicator { NoFocusIndicator , CanvasFocusIndicator , ItemFocusIndicator }
	Focus indicator. More...

Public Slots
void	replot ()
	Invalidate the paint cache and repaint the canvas.

Public Member Functions
	QwtPlotCanvas (QwtPlot *=nullptr)
	Constructor.
virtual	~QwtPlotCanvas ()
	Destructor .
void	setPaintAttribute (PaintAttribute, bool on=true)
	Change the paint attributes.
bool	testPaintAttribute (PaintAttribute) const
	Test whether a paint attribute is enabled.
const QPixmap *	backingStore () const
	Get the backing store.
Q_INVOKABLE void	invalidateBackingStore ()
	Invalidate the internal backing store .
virtual bool	event (QEvent *) override
	Qt event handler for QEvent::PolishRequest and QEvent::StyleChange.
Q_INVOKABLE QPainterPath	borderPath (const QRect &) const
	Calculate the painter path for a styled or rounded border.
Public Member Functions inherited from QwtPlotAbstractCanvas
	QwtPlotAbstractCanvas (QWidget *canvasWidget)
	Constructor.
virtual	~QwtPlotAbstractCanvas ()
	Destructor .
QwtPlot *	plot ()
	Return parent plot widget.
const QwtPlot *	plot () const
	Return parent plot widget.
void	setFocusIndicator (FocusIndicator)
	Set the focus indicator.
FocusIndicator	focusIndicator () const
	Get the focus indicator.
void	setBorderRadius (double)
	Set the radius for the corners of the border frame.
double	borderRadius () const
	Get the radius for the corners of the border frame.

Protected Member Functions
virtual void	paintEvent (QPaintEvent *) override
	Paint event handler.
virtual void	resizeEvent (QResizeEvent *) override
	Resize event handler.
virtual void	drawBorder (QPainter *) override
	Draw border.
Protected Member Functions inherited from QwtPlotAbstractCanvas
QWidget *	canvasWidget ()
const QWidget *	canvasWidget () const
virtual void	drawFocusIndicator (QPainter *)
	Draw the focus indication.
virtual void	drawBackground (QPainter *)
	Helper function for the derived plot canvas.
void	fillBackground (QPainter *)
	Helper function for the derived plot canvas.
void	drawCanvas (QPainter *)
	Draw the plot to the canvas.
void	drawStyled (QPainter *, bool)
	Helper function for the derived plot canvas.
void	drawUnstyled (QPainter *)
	Helper function for the derived plot canvas.
QPainterPath	canvasBorderPath (const QRect &rect) const
void	updateStyleSheetInfo ()
	Update the cached information about the current style sheet.

Properties
double	borderRadius

Detailed Description

Canvas of a QwtPlot.

Member Enumeration Documentation

PaintAttribute

enum QwtPlotCanvas::PaintAttribute

Paint attributes.

Enumerator
BackingStore	BackingStore.
Opaque	Opaque.
HackStyledBackground	HackStyledBackground.
ImmediatePaint	ImmediatePaint.

Constructor & Destructor Documentation

QwtPlotCanvas()

QwtPlotCanvas::QwtPlotCanvas ( QwtPlot *  plot = nullptr )

explicit

Constructor.

~QwtPlotCanvas()

QwtPlotCanvas::~QwtPlotCanvas ( )

virtual

Destructor .

Member Function Documentation

backingStore()

const QPixmap * QwtPlotCanvas::backingStore

(

)

const

Get the backing store.

borderPath()

QPainterPath QwtPlotCanvas::borderPath

(

const QRect &

rect

)

const

Calculate the painter path for a styled or rounded border.

drawBorder()

void QwtPlotCanvas::drawBorder ( QPainter *  painter )

overrideprotectedvirtual

Draw border.

Draw the border of the plot canvas.

Parameters

painter

Painter

See also

setBorderRadius()

Reimplemented from QwtPlotAbstractCanvas.

event()

bool QwtPlotCanvas::event ( QEvent *  event )

overridevirtual

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

invalidateBackingStore()

void QwtPlotCanvas::invalidateBackingStore

(

)

Invalidate the internal backing store .

paintEvent()

void QwtPlotCanvas::paintEvent ( QPaintEvent *  event )

overrideprotectedvirtual

Paint event handler.

Paint event.

Parameters

event

Paint event

replot

void QwtPlotCanvas::replot ( )

slot

Invalidate the paint cache and repaint the canvas.

resizeEvent()

void QwtPlotCanvas::resizeEvent ( QResizeEvent *  event )

overrideprotectedvirtual

Resize event handler.

Resize event.

Parameters

event

Resize event

setPaintAttribute()

void QwtPlotCanvas::setPaintAttribute	(	PaintAttribute	attribute,
		bool	on = true
	)

Change the paint attributes.

testPaintAttribute()

bool QwtPlotCanvas::testPaintAttribute

(

PaintAttribute

attribute

)

const

Test whether a paint attribute is enabled.

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

• /home/runner/work/QWT/QWT/src/plot/qwt_plot_canvas.h
• /home/runner/work/QWT/QWT/src/plot/qwt_plot_canvas.cpp