#include <qwt_polar_canvas.h>

类 QwtPolarCanvas 继承关系图:

类
class	PrivateData

Public 类型
enum	PaintAttribute { BackingStore = 0x01 }
	绘制属性更多...

Public 成员函数
	QwtPolarCanvas (QwtPolarPlot *)
	Constructor

virtual	~QwtPolarCanvas ()
	Destructor

QwtPolarPlot *	plot ()
	Get the plot

const QwtPolarPlot *	plot () const
	Get the plot (const version)

void	setPaintAttribute (PaintAttribute, bool on=true)
	Set a paint attribute

bool	testPaintAttribute (PaintAttribute) const
	Test a paint attribute

const QPixmap *	backingStore () const
	Get the backing store

void	invalidateBackingStore ()
	Invalidate the backing store

QwtPointPolar	invTransform (const QPoint &) const
	Inverse transform from widget coordinates to polar coordinates

QPoint	transform (const QwtPointPolar &) const
	Transform from polar coordinates to widget coordinates

Protected 成员函数
virtual void	paintEvent (QPaintEvent *) override
	Handle paint events

virtual void	resizeEvent (QResizeEvent *) override
	Handle resize events

详细描述

QwtPolarPlot 的画布

成员枚举类型说明

◆ PaintAttribute

enum QwtPolarCanvas::PaintAttribute

绘制属性

枚举值
BackingStore	双缓冲绘制并重用像素图缓冲区的内容，用于绘图被取消隐藏、取消图标化或更改焦点时发生的一些自发重绘。

构造及析构函数说明

◆ QwtPolarCanvas()

QwtPolarCanvas::QwtPolarCanvas ( QwtPolarPlot * plot )

explicit

Constructor

构造函数

◆ ~QwtPolarCanvas()

QwtPolarCanvas::~QwtPolarCanvas ( )

virtual

Destructor

析构函数

成员函数说明

◆ backingStore()

const QPixmap * QwtPolarCanvas::backingStore ( ) const

Get the backing store

获取后台存储像素图

◆ invalidateBackingStore()

void QwtPolarCanvas::invalidateBackingStore ( )

Invalidate the backing store

使内部后台存储失效

◆ invTransform()

QwtPointPolar QwtPolarCanvas::invTransform ( const QPoint & pos ) const

Inverse transform from widget coordinates to polar coordinates

将点从控件坐标转换为极坐标

◆ paintEvent()

void QwtPolarCanvas::paintEvent ( QPaintEvent * event )

overrideprotectedvirtual

Handle paint events

Paint event

参数

event Paint event

◆ plot() [1/2]

QwtPolarPlot * QwtPolarCanvas::plot ( )

Get the plot

获取父绘图控件

◆ plot() [2/2]

const QwtPolarPlot * QwtPolarCanvas::plot ( ) const

Get the plot (const version)

获取父绘图控件（常量版本）

◆ resizeEvent()

void QwtPolarCanvas::resizeEvent ( QResizeEvent * event )

overrideprotectedvirtual

Handle resize events

Resize event

参数

event Resize event

◆ setPaintAttribute()

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

Set a paint attribute

更改绘制属性

◆ testPaintAttribute()

bool QwtPolarCanvas::testPaintAttribute ( PaintAttribute attribute ) const

Test a paint attribute

测试绘制属性是否启用

◆ transform()

QPoint QwtPolarCanvas::transform ( const QwtPointPolar & polarPos ) const

Transform from polar coordinates to widget coordinates

将点从极坐标转换为控件坐标

该类的文档由以下文件生成:

/home/runner/work/QWT/QWT/src/plot/qwt_polar_canvas.h
/home/runner/work/QWT/QWT/src/plot/qwt_polar_canvas.cpp

类

Public 类型

Public 成员函数

Protected 成员函数