QwtPlotCanvas类 参考

QwtPlot 的画布 更多...

#include <qwt_plot_canvas.h>

类 QwtPlotCanvas 继承关系图:

类
class	PrivateData

Public 类型
enum	PaintAttribute { BackingStore = 1 , Opaque = 2 , HackStyledBackground = 4 , ImmediatePaint = 8 }
	绘制属性 更多...
Public 类型 继承自 QwtPlotAbstractCanvas
enum	FocusIndicator { NoFocusIndicator , CanvasFocusIndicator , ItemFocusIndicator }
	焦点指示器 更多...

Public 槽
void	replot ()
	使绘制缓存失效并重绘画布

Public 成员函数
	QwtPlotCanvas (QwtPlot *=nullptr)
	构造函数
virtual	~QwtPlotCanvas ()
	析构函数
void	setPaintAttribute (PaintAttribute, bool on=true)
	更改绘制属性
bool	testPaintAttribute (PaintAttribute) const
	测试绘制属性是否启用
const QPixmap *	backingStore () const
	获取后备存储
Q_INVOKABLE void	invalidateBackingStore ()
	使内部后备存储失效
virtual bool	event (QEvent *) override
	Qt 事件处理器，处理 QEvent::PolishRequest 和 QEvent::StyleChange
Q_INVOKABLE QPainterPath	borderPath (const QRect &) const
	计算样式边框或圆角边框的绘制路径
Public 成员函数 继承自 QwtPlotAbstractCanvas
	QwtPlotAbstractCanvas (QWidget *canvasWidget)
	构造函数
virtual	~QwtPlotAbstractCanvas ()
	析构函数
QwtPlot *	plot ()
	返回父绘图部件
const QwtPlot *	plot () const
	返回父绘图部件
void	setFocusIndicator (FocusIndicator)
	设置焦点指示器
FocusIndicator	focusIndicator () const
	获取焦点指示器
void	setBorderRadius (double)
	设置边框框架角落的半径
double	borderRadius () const
	获取边框框架角落的半径

Protected 成员函数
virtual void	paintEvent (QPaintEvent *) override
	Paint event handler
virtual void	resizeEvent (QResizeEvent *) override
	Resize event handler
virtual void	drawBorder (QPainter *) override
	Draw border
Protected 成员函数 继承自 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

属性
double	borderRadius

详细描述

QwtPlot 的画布

成员枚举类型说明

PaintAttribute

enum QwtPlotCanvas::PaintAttribute

绘制属性

枚举值
BackingStore	后备存储
Opaque	不透明
HackStyledBackground	样式背景黑客
ImmediatePaint	立即绘制

构造及析构函数说明

QwtPlotCanvas()

QwtPlotCanvas::QwtPlotCanvas ( QwtPlot *  plot = nullptr )

explicit

构造函数

~QwtPlotCanvas()

QwtPlotCanvas::~QwtPlotCanvas ( )

virtual

析构函数

成员函数说明

backingStore()

const QPixmap * QwtPlotCanvas::backingStore

(

)

const

获取后备存储

borderPath()

QPainterPath QwtPlotCanvas::borderPath

(

const QRect &

rect

)

const

计算样式边框或圆角边框的绘制路径

drawBorder()

void QwtPlotCanvas::drawBorder ( QPainter *  painter )

overrideprotectedvirtual

Draw border

Draw the border of the plot canvas

参数

painter

Painter

参见

setBorderRadius()

重载 QwtPlotAbstractCanvas .

event()

bool QwtPlotCanvas::event ( QEvent *  event )

overridevirtual

Qt 事件处理器，处理 QEvent::PolishRequest 和 QEvent::StyleChange

invalidateBackingStore()

void QwtPlotCanvas::invalidateBackingStore

(

)

使内部后备存储失效

paintEvent()

void QwtPlotCanvas::paintEvent ( QPaintEvent *  event )

overrideprotectedvirtual

Paint event handler

Paint event

参数

event

Paint event

replot

void QwtPlotCanvas::replot ( )

slot

使绘制缓存失效并重绘画布

resizeEvent()

void QwtPlotCanvas::resizeEvent ( QResizeEvent *  event )

overrideprotectedvirtual

Resize event handler

Resize event

参数

event

Resize event

setPaintAttribute()

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

更改绘制属性

testPaintAttribute()

bool QwtPlotCanvas::testPaintAttribute

(

PaintAttribute

attribute

)

const

测试绘制属性是否启用

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该类的文档由以下文件生成:

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