QwtFigureLayout类 参考

Custom layout manager for QwtFigureWidget that handles both normalized coordinates and grid layouts 更多...

#include <qwt_figure_layout.h>

类 QwtFigureLayout 继承关系图:

类
class	PrivateData

Public 成员函数
	QwtFigureLayout (QWidget *parent)
virtual void	addItem (QLayoutItem *item) override
virtual QLayoutItem *	itemAt (int index) const override
virtual QLayoutItem *	takeAt (int index) override
virtual int	count () const override
virtual QSize	sizeHint () const override
virtual QSize	minimumSize () const override
virtual void	setGeometry (const QRect &rect) override
void	addAxes (QWidget *widget, const QRectF &rect)
	Add a widget with normalized coordinates
void	addAxes (QWidget *widget, qreal left, qreal top, qreal width, qreal height)
	Add a widget with normalized coordinates using separate parameters
void	addGridAxes (QWidget *widget, int rowCnt, int colCnt, int row, int col, int rowSpan=1, int colSpan=1, qreal wspace=0.0, qreal hspace=0.0)
void	setAxesNormPos (QWidget *widget, const QRectF &rect)
QRectF	widgetNormRect (QWidget *widget) const
QRect	calcActualRect (const QRect &parentRect, const QRectF &normRect)

静态 Public 成员函数
static QRectF	calcNormRect (const QRect &parentRect, const QRect &rect)

Protected 成员函数
QRectF	calcGridRect (int rowCnt, int colCnt, int row, int col, int rowSpan=1, int colSpan=1, qreal wspace=0.0, qreal hspace=0.0) const
	Calculate the normalized rectangle for a grid cell

详细描述

Custom layout manager for QwtFigureWidget that handles both normalized coordinates and grid layouts

成员函数说明

addAxes() [1/2]

void QwtFigureLayout::addAxes	(	QWidget *	widget,
		const QRectF &	rect
	)

Add a widget with normalized coordinates

This method adds a widget to the layout using normalized coordinates in the range [0,1]. The coordinates are specified as [left, top, width, height], where:

• left: distance from the left edge of the figure
• top: distance from the top edge of the figure
• width: width of the widget
• height: height of the widget

参数

widget	Widget to add
rect	Normalized coordinates [left, top, width, height] in range [0,1]

注解

All coordinates must be in the [0,1] range. left+width should not exceed 1, and top+height should not exceed 1.

// Add a widget that occupies the top-left quarter of the figure
QWidget* widget = new QWidget;
layout->addAxes(widget, QRectF(0.0, 0.0, 0.5, 0.5));

// Add a widget that occupies the bottom-right quarter of the figure
QWidget* widget = new QWidget;
layout->addAxes(widget, QRectF(0.5, 0.5, 0.5, 0.5));

addAxes() [2/2]

void QwtFigureLayout::addAxes	(	QWidget *	widget,
		qreal	left,
		qreal	top,
		qreal	width,
		qreal	height
	)

Add a widget with normalized coordinates using separate parameters

This is a convenience overload that adds a widget to the layout using normalized coordinates in the range [0,1] with separate left, top, width, and height parameters. The coordinates use Qt's standard top-left coordinate system.

参数

widget	Widget to add
left	Normalized distance from the left edge [0,1]
top	Normalized distance from the top edge [0,1]
width	Normalized width of the widget [0,1]
height	Normalized height of the widget [0,1]

注解

All parameters must be in the range [0,1]. The sum of left + width should not exceed 1, and the sum of top + height should not exceed 1.

// Add a widget that occupies the top-left quarter of the figure
QWidget* widget = new QWidget;
layout->addAxes(widget, 0.0, 0.0, 0.5, 0.5);

// Add a widget that occupies the center of the figure
QWidget* widget = new QWidget;
layout->addAxes(widget, 0.25, 0.25, 0.5, 0.5);

calcGridRect()

QRectF QwtFigureLayout::calcGridRect ( int  rowCnt, int  colCnt, int  row, int  col, int  rowSpan = 1, int  colSpan = 1, qreal  wspace = 0.0, qreal  hspace = 0.0  ) const

protected

Calculate the normalized rectangle for a grid cell

This method calculates the normalized coordinates for a specific grid cell based on the current layout parameters and grid configuration.

参数

rowCnt	Total number of rows in the grid
colCnt	Total number of columns in the grid
row	Grid row position (0-based)
col	Grid column position (0-based)
rowSpan	Number of rows to span (default: 1)
colSpan	Number of columns to span (default: 1)

返回

Normalized coordinates [left, top, width, height] in range [0,1]

// Get the normalized rectangle for the top-left cell in a 2x2 grid
QRectF rect = layout->calcGridRect(2, 2, 0, 0);

// Get the normalized rectangle for a cell spanning two columns
QRectF rect = layout->calcGridRect(3, 3, 1, 0, 1, 2);

---

该类的文档由以下文件生成:

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