Base class of QwtPlotOpenGLCanvas and QwtPlotGLCanvas. More...

#include <qwt_plot_abstract_canvas.h>

Inheritance diagram for QwtPlotAbstractGLCanvas:

Classes
class	PrivateData

Public Types
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...

Public Member Functions
	QwtPlotAbstractGLCanvas (QWidget *canvasWidget)
	Paint attributes.

virtual	~QwtPlotAbstractGLCanvas ()
	Destructor.

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

bool	testPaintAttribute (PaintAttribute) const
	Test whether a paint attribute is enabled.

void	setFrameStyle (int style)
	Set the frame style.

int	frameStyle () const

void	setFrameShadow (QFrame::Shadow)
	Set the frame shadow.

QFrame::Shadow	frameShadow () const

void	setFrameShape (QFrame::Shape)
	Set the frame shape.

QFrame::Shape	frameShape () const

void	setLineWidth (int)
	Set the frame line width.

int	lineWidth () const

void	setMidLineWidth (int)
	Set the frame mid line width.

int	midLineWidth () const

int	frameWidth () const

QRect	frameRect () const

virtual void	invalidateBackingStore ()=0
	Invalidate the internal backing store.

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

void	setBorderRadius (double)
	Set the radius for the corners of the border frame.

double	borderRadius () const

Protected Member Functions
void	replot ()
	Invalidate the paint cache and repaint the canvas.

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

Protected Member Functions inherited from QwtPlotAbstractCanvas
QWidget *	canvasWidget ()

const QWidget *	canvasWidget () const

virtual void	drawFocusIndicator (QPainter *)
	Draw the focus indication.

virtual void	drawBorder (QPainter *)
	Draw the border of the canvas.

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.

Detailed Description

Base class of QwtPlotOpenGLCanvas and QwtPlotGLCanvas.

Member Enumeration Documentation

◆ PaintAttribute

enum QwtPlotAbstractGLCanvas::PaintAttribute

Paint attributes.

The default setting enables BackingStore and Opaque.

See also: setPaintAttribute(), testPaintAttribute()

Enumerator

BackingStore

Paint double buffered reusing the content of the pixmap buffer when possible.

Using a backing store might improve the performance significantly, when working with widget overlays ( like rubber bands ). Disabling the cache might improve the performance for incremental paints (using QwtPlotDirectPainter ).

See also: backingStore(), invalidateBackingStore()

ImmediatePaint

When ImmediatePaint is set replot() calls repaint() instead of update().

See also: replot(), QWidget::repaint(), QWidget::update()

Constructor & Destructor Documentation

◆ QwtPlotAbstractGLCanvas()

QwtPlotAbstractGLCanvas::QwtPlotAbstractGLCanvas ( QWidget * canvasWidget )

explicit

Paint attributes.

Constructor.

Parameters

canvasWidget plot canvas widget

Member Function Documentation

◆ frameRect()

QRect QwtPlotAbstractGLCanvas::frameRect ( ) const

Returns: The rectangle where the frame is drawn in.

◆ frameShadow()

QFrame::Shadow QwtPlotAbstractGLCanvas::frameShadow ( ) const

Returns: Frame shadow

See also: setFrameShadow(), QFrame::setFrameShadow()

◆ frameShape()

QFrame::Shape QwtPlotAbstractGLCanvas::frameShape ( ) const

Returns: Frame shape

See also: setFrameShape(), QFrame::frameShape()

◆ frameStyle()

int QwtPlotAbstractGLCanvas::frameStyle ( ) const

Returns: The bitwise OR between a frameShape() and a frameShadow()

See also: setFrameStyle(), QFrame::frameStyle()

◆ frameWidth()

int QwtPlotAbstractGLCanvas::frameWidth ( ) const

Returns: Frame width depending on the style, line width and midline width.

◆ invalidateBackingStore()

virtual void QwtPlotAbstractGLCanvas::invalidateBackingStore ( )

pure virtual

Invalidate the internal backing store.

Implemented in QwtPlotGLCanvas, and QwtPlotOpenGLCanvas.

◆ lineWidth()

int QwtPlotAbstractGLCanvas::lineWidth ( ) const

Returns: Line width of the frame

See also: setLineWidth(), midLineWidth()

◆ midLineWidth()

int QwtPlotAbstractGLCanvas::midLineWidth ( ) const

Returns: Midline width of the frame

See also: setMidLineWidth(), lineWidth()

◆ replot()

void QwtPlotAbstractGLCanvas::replot ( )

protected

Invalidate the paint cache and repaint the canvas.

See also: invalidatePaintCache()

◆ setFrameShadow()

void QwtPlotAbstractGLCanvas::setFrameShadow ( QFrame::Shadow shadow )

Set the frame shadow.

Parameters

shadow Frame shadow

See also: frameShadow(), setFrameShape(), QFrame::setFrameShadow()

◆ setFrameShape()

void QwtPlotAbstractGLCanvas::setFrameShape ( QFrame::Shape shape )

Set the frame shape.

Parameters

shape Frame shape

See also: frameShape(), setFrameShadow(), QFrame::frameShape()

◆ setFrameStyle()

void QwtPlotAbstractGLCanvas::setFrameStyle ( int style )

Set the frame style.

Parameters

style The bitwise OR between a shape and a shadow.

See also: frameStyle(), QFrame::setFrameStyle(), setFrameShadow(), setFrameShape()

◆ setLineWidth()

void QwtPlotAbstractGLCanvas::setLineWidth ( int width )

Set the frame line width.

The default line width is 2 pixels.

Parameters

width Line width of the frame

See also: lineWidth(), setMidLineWidth()

◆ setMidLineWidth()

void QwtPlotAbstractGLCanvas::setMidLineWidth ( int width )

Set the frame mid line width.

The default midline width is 0 pixels.

Parameters

width Midline width of the frame

See also: midLineWidth(), setLineWidth()

◆ setPaintAttribute()

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

Changing the paint attributes.

Parameters

attribute	Paint attribute
on	On/Off

See also: testPaintAttribute()

◆ testPaintAttribute()

bool QwtPlotAbstractGLCanvas::testPaintAttribute ( PaintAttribute attribute ) const

Test whether a paint attribute is enabled.

Parameters

attribute Paint attribute

Returns: true, when attribute is enabled

See also: setPaintAttribute()

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

/home/runner/work/QWT/QWT/src/qwt_plot_abstract_canvas.h
/home/runner/work/QWT/QWT/src/qwt_plot_abstract_canvas.cpp

Classes

Public Types

Public Member Functions

Protected Member Functions

Detailed Description

Member Enumeration Documentation

◆ PaintAttribute

Constructor & Destructor Documentation

◆ QwtPlotAbstractGLCanvas()

Member Function Documentation

◆ frameRect()

◆ frameShadow()

◆ frameShape()

◆ frameStyle()

◆ frameWidth()

◆ invalidateBackingStore()

◆ lineWidth()

◆ midLineWidth()

◆ replot()

◆ setFrameShadow()

◆ setFrameShape()

◆ setFrameStyle()

◆ setLineWidth()

◆ setMidLineWidth()

◆ setPaintAttribute()

◆ testPaintAttribute()