QwtDynGridLayout类 参考

动态网格布局，根据当前大小调整列数和行数 更多...

#include <qwt_dyngrid_layout.h>

类 QwtDynGridLayout 继承关系图:

类
class	PrivateData

Public 成员函数
	QwtDynGridLayout (QWidget *, int margin=0, int spacing=-1)
	构造函数，带父控件、边距和间距
	QwtDynGridLayout (int spacing=-1)
	构造函数，仅带间距
virtual	~QwtDynGridLayout ()
	析构函数
virtual void	invalidate () override
	使所有内部缓存失效
void	setMaxColumns (uint maxColumns)
	设置列数的上限
uint	maxColumns () const
	获取列数的上限
uint	numRows () const
	获取当前布局的行数
uint	numColumns () const
	获取当前布局的列数
virtual void	addItem (QLayoutItem *) override
	将项目添加到下一个空闲位置
virtual QLayoutItem *	itemAt (int index) const override
	获取指定索引处的项目
virtual QLayoutItem *	takeAt (int index) override
	移除并返回指定索引处的项目
virtual int	count () const override
	获取布局中的项目数量
void	setExpandingDirections (Qt::Orientations)
	设置布局的扩展方向
virtual Qt::Orientations	expandingDirections () const override
	获取布局的扩展方向
QList< QRect >	layoutItems (const QRect &, uint numColumns) const
	计算布局项目的几何区域
virtual int	maxItemWidth () const
	获取所有布局项目的最大宽度
virtual void	setGeometry (const QRect &) override
	设置布局的几何区域
virtual bool	hasHeightForWidth () const override
	检查布局是否有高度随宽度变化的特性
virtual int	heightForWidth (int) const override
	获取给定宽度的首选高度
virtual QSize	sizeHint () const override
	获取布局的大小提示
virtual bool	isEmpty () const override
	检查布局是否为空
uint	itemCount () const
	获取布局项目的数量
virtual uint	columnsForWidth (int width) const
	计算给定宽度的列数

Protected 成员函数
void	layoutGrid (uint numColumns, QVector< int > &rowHeight, QVector< int > &colWidth) const
	Calculate the dimensions for the columns and rows for a grid of numColumns columns.
void	stretchGrid (const QRect &rect, uint numColumns, QVector< int > &rowHeight, QVector< int > &colWidth) const
	Stretch columns in case of expanding() & QSizePolicy::Horizontal and rows in case of expanding() & QSizePolicy::Vertical to fill the entire rect.

详细描述

动态网格布局，根据当前大小调整列数和行数

构造及析构函数说明

QwtDynGridLayout() [1/2]

QwtDynGridLayout::QwtDynGridLayout ( QWidget *  parent, int  margin = 0, int  spacing = -1  )

explicit

构造函数，带父控件、边距和间距

QwtDynGridLayout() [2/2]

QwtDynGridLayout::QwtDynGridLayout ( int  spacing = -1 )

explicit

构造函数，仅带间距

~QwtDynGridLayout()

QwtDynGridLayout::~QwtDynGridLayout ( )

virtual

析构函数

成员函数说明

addItem()

void QwtDynGridLayout::addItem ( QLayoutItem *  item )

overridevirtual

将项目添加到下一个空闲位置

columnsForWidth()

uint QwtDynGridLayout::columnsForWidth ( int  width ) const

virtual

计算给定宽度的列数

count()

int QwtDynGridLayout::count ( ) const

overridevirtual

获取布局中的项目数量

expandingDirections()

Qt::Orientations QwtDynGridLayout::expandingDirections ( ) const

overridevirtual

获取布局的扩展方向

hasHeightForWidth()

bool QwtDynGridLayout::hasHeightForWidth ( ) const

overridevirtual

检查布局是否有高度随宽度变化的特性

heightForWidth()

int QwtDynGridLayout::heightForWidth ( int  width ) const

overridevirtual

获取给定宽度的首选高度

invalidate()

void QwtDynGridLayout::invalidate ( )

overridevirtual

使所有内部缓存失效

isEmpty()

bool QwtDynGridLayout::isEmpty ( ) const

overridevirtual

检查布局是否为空

itemAt()

QLayoutItem * QwtDynGridLayout::itemAt ( int  index ) const

overridevirtual

获取指定索引处的项目

itemCount()

uint QwtDynGridLayout::itemCount

(

)

const

获取布局项目的数量

layoutGrid()

void QwtDynGridLayout::layoutGrid ( uint  numColumns, QVector< int > &  rowHeight, QVector< int > &  colWidth  ) const

protected

Calculate the dimensions for the columns and rows for a grid of numColumns columns.

参数

numColumns	Number of columns.
rowHeight	Array where to fill in the calculated row heights.
colWidth	Array where to fill in the calculated column widths.

layoutItems()

QList< QRect > QwtDynGridLayout::layoutItems	(	const QRect &	rect,
		uint	numColumns
	)		const

计算布局项目的几何区域

maxColumns()

uint QwtDynGridLayout::maxColumns

(

)

const

获取列数的上限

maxItemWidth()

int QwtDynGridLayout::maxItemWidth ( ) const

virtual

获取所有布局项目的最大宽度

numColumns()

uint QwtDynGridLayout::numColumns

(

)

const

获取当前布局的列数

numRows()

uint QwtDynGridLayout::numRows

(

)

const

获取当前布局的行数

setExpandingDirections()

void QwtDynGridLayout::setExpandingDirections

(

Qt::Orientations

expanding

)

设置布局的扩展方向

setGeometry()

void QwtDynGridLayout::setGeometry ( const QRect &  rect )

overridevirtual

设置布局的几何区域

setMaxColumns()

void QwtDynGridLayout::setMaxColumns

(

uint

maxColumns

)

设置列数的上限

sizeHint()

QSize QwtDynGridLayout::sizeHint ( ) const

overridevirtual

获取布局的大小提示

stretchGrid()

void QwtDynGridLayout::stretchGrid ( const QRect &  rect, uint  numColumns, QVector< int > &  rowHeight, QVector< int > &  colWidth  ) const

protected

Stretch columns in case of expanding() & QSizePolicy::Horizontal and rows in case of expanding() & QSizePolicy::Vertical to fill the entire rect.

Rows and columns are stretched with the same factor.

参数

rect	Bounding rectangle
numColumns	Number of columns
rowHeight	Array to be filled with the calculated row heights
colWidth	Array to be filled with the calculated column widths

参见

setExpanding(), expanding()

takeAt()

QLayoutItem * QwtDynGridLayout::takeAt ( int  index )

overridevirtual

移除并返回指定索引处的项目

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该类的文档由以下文件生成:

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