mirror of
https://github.com/qgis/QGIS.git
synced 2025-10-04 00:04:03 -04:00
33fc476d89
* require qwt >=6.2 (and fallback to internal 6.3 if system's qwt doesn't suffice) * debian doesn't have qwt for Qt6 and won't have it for trixie
145 lines
3.8 KiB
C++
145 lines
3.8 KiB
C++
/******************************************************************************
|
|
* Qwt Widget Library
|
|
* Copyright (C) 1997 Josef Wilgen
|
|
* Copyright (C) 2002 Uwe Rathmann
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the Qwt License, Version 1.0
|
|
*****************************************************************************/
|
|
|
|
#ifndef QWT_PLOT_RESCALER_H
|
|
#define QWT_PLOT_RESCALER_H
|
|
|
|
#include "qwt_global.h"
|
|
#include "qwt_plot.h"
|
|
|
|
#include <qobject.h>
|
|
|
|
class QwtPlot;
|
|
class QwtInterval;
|
|
class QResizeEvent;
|
|
|
|
/*!
|
|
\brief QwtPlotRescaler takes care of fixed aspect ratios for plot scales
|
|
|
|
QwtPlotRescaler auto adjusts the axes of a QwtPlot according
|
|
to fixed aspect ratios.
|
|
*/
|
|
|
|
class QWT_EXPORT QwtPlotRescaler : public QObject
|
|
{
|
|
Q_OBJECT
|
|
|
|
public:
|
|
/*!
|
|
The rescale policy defines how to rescale the reference axis and
|
|
their depending axes.
|
|
|
|
\sa ExpandingDirection, setIntervalHint()
|
|
*/
|
|
enum RescalePolicy
|
|
{
|
|
/*!
|
|
The interval of the reference axis remains unchanged, when the
|
|
geometry of the canvas changes. All other axes
|
|
will be adjusted according to their aspect ratio.
|
|
*/
|
|
Fixed,
|
|
|
|
/*!
|
|
The interval of the reference axis will be shrunk/expanded,
|
|
when the geometry of the canvas changes. All other axes
|
|
will be adjusted according to their aspect ratio.
|
|
|
|
The interval, that is represented by one pixel is fixed.
|
|
|
|
*/
|
|
Expanding,
|
|
|
|
/*!
|
|
The intervals of the axes are calculated, so that all axes include
|
|
their interval hint.
|
|
*/
|
|
Fitting
|
|
};
|
|
|
|
/*!
|
|
When rescalePolicy() is set to Expanding its direction depends
|
|
on ExpandingDirection
|
|
*/
|
|
enum ExpandingDirection
|
|
{
|
|
//! The upper limit of the scale is adjusted
|
|
ExpandUp,
|
|
|
|
//! The lower limit of the scale is adjusted
|
|
ExpandDown,
|
|
|
|
//! Both limits of the scale are adjusted
|
|
ExpandBoth
|
|
};
|
|
|
|
explicit QwtPlotRescaler( QWidget* canvas,
|
|
QwtAxisId referenceAxis = QwtAxis::XBottom,
|
|
RescalePolicy = Expanding );
|
|
|
|
virtual ~QwtPlotRescaler();
|
|
|
|
void setEnabled( bool );
|
|
bool isEnabled() const;
|
|
|
|
void setRescalePolicy( RescalePolicy );
|
|
RescalePolicy rescalePolicy() const;
|
|
|
|
void setExpandingDirection( ExpandingDirection );
|
|
void setExpandingDirection( QwtAxisId, ExpandingDirection );
|
|
ExpandingDirection expandingDirection( QwtAxisId ) const;
|
|
|
|
void setReferenceAxis( QwtAxisId );
|
|
QwtAxisId referenceAxis() const;
|
|
|
|
void setAspectRatio( double ratio );
|
|
void setAspectRatio( QwtAxisId, double ratio );
|
|
double aspectRatio( QwtAxisId ) const;
|
|
|
|
void setIntervalHint( QwtAxisId, const QwtInterval& );
|
|
QwtInterval intervalHint( QwtAxisId ) const;
|
|
|
|
QWidget* canvas();
|
|
const QWidget* canvas() const;
|
|
|
|
QwtPlot* plot();
|
|
const QwtPlot* plot() const;
|
|
|
|
virtual bool eventFilter( QObject*, QEvent* ) QWT_OVERRIDE;
|
|
|
|
void rescale() const;
|
|
|
|
protected:
|
|
virtual void canvasResizeEvent( QResizeEvent* );
|
|
|
|
virtual void rescale( const QSize& oldSize, const QSize& newSize ) const;
|
|
virtual QwtInterval expandScale(
|
|
QwtAxisId, const QSize& oldSize, const QSize& newSize ) const;
|
|
|
|
virtual QwtInterval syncScale(
|
|
QwtAxisId, const QwtInterval& reference, const QSize& size ) const;
|
|
|
|
virtual void updateScales(
|
|
QwtInterval intervals[QwtAxis::AxisPositions] ) const;
|
|
|
|
Qt::Orientation orientation( QwtAxisId ) const;
|
|
QwtInterval interval( QwtAxisId ) const;
|
|
QwtInterval expandInterval( const QwtInterval&,
|
|
double width, ExpandingDirection ) const;
|
|
|
|
private:
|
|
double pixelDist( QwtAxisId, const QSize& ) const;
|
|
|
|
class AxisData;
|
|
class PrivateData;
|
|
PrivateData* m_data;
|
|
};
|
|
|
|
#endif
|