Layout engine for QwtPlot components. More...

#include <qwt_plot_layout_engine.h>

Classes
struct	Dimensions
	Structure holding dimension values for layout calculation. More...

class	LayoutData
	Data structure for layout calculation. More...

Public Member Functions
	QwtPlotLayoutEngine ()
	Default constructor for QwtPlotLayoutEngine.

QRectF	layoutLegend (int plotLayoutOptions, const LayoutData::LegendData &legendData, const QRectF &rect, const QSize &legendHint) const
	Calculate legend rectangle within available space.

QRectF	alignLegend (const QSize &legendHint, const QRectF &canvasRect, const QRectF &legendRect) const
	Align legend rectangle relative to canvas.

void	alignScales (int plotLayoutOptions, const LayoutData &layoutData, QRectF &canvasRect, QRectF scaleRect[QwtAxis::AxisPositions]) const
	Align scale rectangles with canvas.

void	alignScalesToCanvas (int plotLayoutOptions, const LayoutData &layoutData, const QRectF &canvasRect, QRectF scaleRect[QwtAxis::AxisPositions]) const
	Align scale rectangles to canvas boundaries.

Dimensions	layoutDimensions (int plotLayoutOptions, const LayoutData &layoutData, const QRectF &rect) const
	Iteratively calculate the layout dimensions for a QwtPlot.

void	setSpacing (unsigned int spacing)
	Set spacing value.

unsigned int	spacing () const
	Get spacing value.

void	setAlignCanvas (int axisPos, bool on)
	Set canvas alignment to scale for a specific axis position.

bool	alignCanvas (int axisPos) const
	Check if canvas is aligned to scale for a specific axis position.

void	setCanvasMargin (int axisPos, int margin)
	Set canvas margin for a specific axis position.

int	canvasMargin (int axisPos) const
	Get canvas margin for a specific axis position.

void	setLegendPos (QwtPlot::LegendPosition pos)
	Set the legend position.

QwtPlot::LegendPosition	legendPos () const
	Get the legend position.

void	setLegendRatio (double ratio)
	Set the legend ratio.

double	legendRatio () const
	Get the legend ratio.

Detailed Description

Layout engine for QwtPlot components.

Constructor & Destructor Documentation

◆ QwtPlotLayoutEngine()

QwtPlotLayoutEngine::QwtPlotLayoutEngine ( )

Default constructor for QwtPlotLayoutEngine.

Member Function Documentation

◆ alignCanvas()

bool QwtPlotLayoutEngine::alignCanvas ( int axisPos ) const

Check if canvas is aligned to scale for a specific axis position.

◆ alignLegend()

QRectF QwtPlotLayoutEngine::alignLegend	(	const QSize &	legendHint,
		const QRectF &	canvasRect,
		const QRectF &	legendRect
	)		const

Align legend rectangle relative to canvas.

◆ alignScales()

void QwtPlotLayoutEngine::alignScales	(	int	plotLayoutOptions,
		const LayoutData &	layoutData,
		QRectF &	canvasRect,
		QRectF	scaleRect[QwtAxis::AxisPositions]
	)		const

Align scale rectangles with canvas.

初始化骨干偏移量 (Backbone Offset) 首先计算每个轴的骨干偏移量，这个偏移量由以下几部分组成：
- 如果不对齐画布到刻度，则加上画布边距
- 如果不忽略框架，则加上画布内容边距

处理X轴和Y轴的相互影响函数遍历所有轴位置，处理X轴和Y轴之间的相互空间影响：

对于X轴（水平轴）：检查左侧Y轴和右侧Y轴的影响计算左右偏移量，考虑轴起始/结束距离和骨干偏移调整X轴矩形位置，必要时调整画布矩形

对于Y轴（垂直轴）：检查底部X轴和顶部X轴的影响计算上下偏移量，考虑轴起始/结束距离和骨干偏移调整Y轴矩形位置，必要时调整画布矩形

当轴需要比可用空间更多的空间时，函数会调整画布矩形

在所有轴相互调整后，函数进行最终的对齐调整，确保轴与画布边缘正确对齐

◆ alignScalesToCanvas()

void QwtPlotLayoutEngine::alignScalesToCanvas	(	int	plotLayoutOptions,
		const LayoutData &	layoutData,
		const QRectF &	canvasRect,
		QRectF	scaleRect[QwtAxis::AxisPositions]
	)		const

Align scale rectangles to canvas boundaries.

初始化骨干偏移量 (Backbone Offset) 首先计算每个轴的骨干偏移量，这个偏移量由以下几部分组成：
- 如果不对齐画布到刻度，则加上画布边距
- 如果不忽略框架，则加上画布内容边距

处理X轴和Y轴的相互影响函数遍历所有轴位置，处理X轴和Y轴之间的相互空间影响：

对于X轴（水平轴）：检查左侧Y轴和右侧Y轴的影响计算左右偏移量，考虑轴起始/结束距离和骨干偏移调整X轴矩形位置，必要时调整画布矩形

对于Y轴（垂直轴）：检查底部X轴和顶部X轴的影响计算上下偏移量，考虑轴起始/结束距离和骨干偏移调整Y轴矩形位置，必要时调整画布矩形

在所有轴相互调整后，函数进行最终的对齐调整，确保轴与画布边缘正确对齐

◆ canvasMargin()

int QwtPlotLayoutEngine::canvasMargin ( int axisPos ) const

Get canvas margin for a specific axis position.

◆ layoutDimensions()

QwtPlotLayoutEngine::Dimensions QwtPlotLayoutEngine::layoutDimensions	(	int	plotLayoutOptions,
		const LayoutData &	layoutData,
		const QRectF &	rect
	)		const

Iteratively calculate the layout dimensions for a QwtPlot.

◆ layoutLegend()

QRectF QwtPlotLayoutEngine::layoutLegend	(	int	plotLayoutOptions,
		const LayoutData::LegendData &	legendData,
		const QRectF &	rect,
		const QSize &	legendHint
	)		const

Calculate legend rectangle within available space.

◆ legendPos()

QwtPlot::LegendPosition QwtPlotLayoutEngine::legendPos ( ) const

Get the legend position.

◆ legendRatio()

double QwtPlotLayoutEngine::legendRatio ( ) const

Get the legend ratio.

◆ setAlignCanvas()

void QwtPlotLayoutEngine::setAlignCanvas	(	int	axisPos,
		bool	on
	)

Set canvas alignment to scale for a specific axis position.

◆ setCanvasMargin()

void QwtPlotLayoutEngine::setCanvasMargin	(	int	axisPos,
		int	margin
	)

Set canvas margin for a specific axis position.

◆ setLegendPos()

void QwtPlotLayoutEngine::setLegendPos ( QwtPlot::LegendPosition pos )

Set the legend position.

◆ setLegendRatio()

void QwtPlotLayoutEngine::setLegendRatio ( double ratio )

Set the legend ratio.

◆ setSpacing()

void QwtPlotLayoutEngine::setSpacing ( unsigned int spacing )

Set spacing value.

◆ spacing()

unsigned int QwtPlotLayoutEngine::spacing ( ) const

Get spacing value.

The documentation for this class was generated from the following files:

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

Classes

Public Member Functions