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. More...

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

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
	Get the frame style.

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

QFrame::Shadow	frameShadow () const
	Get the frame shadow.

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

QFrame::Shape	frameShape () const
	Get the frame shape.

void	setLineWidth (int)
	Set the frame line width.

int	lineWidth () const
	Get the line width of the frame.

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

int	midLineWidth () const
	Get the midline width of the frame.

int	frameWidth () const
	Get the frame width depending on the style, line width and midline width.

QRect	frameRect () const
	Get the rectangle where the frame is drawn in.

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

Public Member Functions inherited from QwtPlotAbstractCanvas
	QwtPlotAbstractCanvas (QWidget *canvasWidget)
	Constructor.

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
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

[in] canvasWidget plot canvas widget

Destructor

Member Function Documentation

◆ frameRect()

QRect QwtPlotAbstractGLCanvas::frameRect ( ) const

Get the rectangle where the frame is drawn in.

Returns: The rectangle where the frame is drawn in

◆ frameShadow()

QFrame::Shadow QwtPlotAbstractGLCanvas::frameShadow ( ) const

Get the frame shadow.

Returns: Frame shadow

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

◆ frameShape()

QFrame::Shape QwtPlotAbstractGLCanvas::frameShape ( ) const

Get the frame shape.

Returns: Frame shape

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

◆ frameStyle()

int QwtPlotAbstractGLCanvas::frameStyle ( ) const

Get the frame style.

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

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

◆ frameWidth()

int QwtPlotAbstractGLCanvas::frameWidth ( ) const

Get the frame width depending on the style, line width and midline width.

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

Get the line width of the frame.

Returns: Line width of the frame

See also: setLineWidth(), midLineWidth()

◆ midLineWidth()

int QwtPlotAbstractGLCanvas::midLineWidth ( ) const

Get the midline width of the frame.

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

[in] shadow Frame shadow

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

◆ setFrameShape()

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

Set the frame shape.

Parameters

[in] shape Frame shape

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

◆ setFrameStyle()

void QwtPlotAbstractGLCanvas::setFrameStyle ( int style )

Set the frame style.

Parameters

[in] 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

[in] 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

[in] width Midline width of the frame

See also: midLineWidth(), setLineWidth()

◆ setPaintAttribute()

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

Changing the paint attributes.

Parameters

[in]	attribute	Paint attribute
[in]	on	On/Off

See also: testPaintAttribute()

◆ testPaintAttribute()

bool QwtPlotAbstractGLCanvas::testPaintAttribute ( PaintAttribute attribute ) const

Test whether a paint attribute is enabled.

Parameters

[in] 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/plot/qwt_plot_abstract_canvas.h
/home/runner/work/QWT/QWT/src/plot/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()