You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
133 lines
3.8 KiB
133 lines
3.8 KiB
/* -*- mode: C++ ; c-file-style: "stroustrup" -*- ***************************** |
|
* 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 |
|
*****************************************************************************/ |
|
|
|
// vim: expandtab |
|
|
|
#ifndef QWT_PLOT_ZOOMER_H |
|
#define QWT_PLOT_ZOOMER_H |
|
|
|
#include <qglobal.h> |
|
#if QT_VERSION < 0x040000 |
|
#include <qvaluestack.h> |
|
#else |
|
#include <qstack.h> |
|
#endif |
|
|
|
#include "qwt_double_rect.h" |
|
#include "qwt_plot_picker.h" |
|
|
|
/*! |
|
\brief QwtPlotZoomer provides stacked zooming for a plot widget |
|
|
|
QwtPlotZoomer offers rubberband selections on the plot canvas, |
|
translating the selected rectangles into plot coordinates and |
|
adjusting the axes to them. Zooming can repeated as often as |
|
possible, limited only by maxStackDepth() or minZoomSize(). |
|
Each rectangle is pushed on a stack. |
|
|
|
Zoom rectangles can be selected depending on selectionFlags() using the |
|
mouse or keyboard (QwtEventPattern, QwtPickerMachine). |
|
QwtEventPattern::MouseSelect3/QwtEventPattern::KeyUndo, |
|
or QwtEventPattern::MouseSelect6/QwtEventPattern::KeyRedo |
|
walk up and down the zoom stack. |
|
QwtEventPattern::MouseSelect2 or QwtEventPattern::KeyHome unzoom to |
|
the initial size. |
|
|
|
QwtPlotZoomer is tailored for plots with one x and y axis, but it is |
|
allowed to attach a second QwtPlotZoomer for the other axes. |
|
|
|
\note The realtime example includes an derived zoomer class that adds |
|
scrollbars to the plot canvas. |
|
*/ |
|
|
|
class QWT_EXPORT QwtPlotZoomer: public QwtPlotPicker |
|
{ |
|
Q_OBJECT |
|
public: |
|
explicit QwtPlotZoomer(QwtPlotCanvas *, bool doReplot = true); |
|
explicit QwtPlotZoomer(int xAxis, int yAxis, |
|
QwtPlotCanvas *, bool doReplot = true); |
|
explicit QwtPlotZoomer(int xAxis, int yAxis, int selectionFlags, |
|
DisplayMode trackerMode, QwtPlotCanvas *, |
|
bool doReplot = true); |
|
|
|
virtual ~QwtPlotZoomer(); |
|
|
|
virtual void setZoomBase(bool doReplot = true); |
|
virtual void setZoomBase(const QwtDoubleRect &); |
|
|
|
QwtDoubleRect zoomBase() const; |
|
QwtDoubleRect zoomRect() const; |
|
|
|
virtual void setAxis(int xAxis, int yAxis); |
|
|
|
void setMaxStackDepth(int); |
|
int maxStackDepth() const; |
|
|
|
#if QT_VERSION < 0x040000 |
|
const QValueStack<QwtDoubleRect> &zoomStack() const; |
|
void setZoomStack(const QValueStack<QwtDoubleRect> &, |
|
int zoomRectIndex = -1); |
|
#else |
|
const QStack<QwtDoubleRect> &zoomStack() const; |
|
void setZoomStack(const QStack<QwtDoubleRect> &, |
|
int zoomRectIndex = -1); |
|
#endif |
|
uint zoomRectIndex() const; |
|
|
|
virtual void setSelectionFlags(int); |
|
|
|
public slots: |
|
void moveBy(double x, double y); |
|
|
|
// These pragmas are local modifications to this third party library to silence warnings |
|
#ifndef Q_OS_WIN |
|
#pragma GCC diagnostic push |
|
#pragma GCC diagnostic ignored "-Woverloaded-virtual" |
|
#endif |
|
|
|
virtual void move(double x, double y); |
|
|
|
#ifndef Q_OS_WIN |
|
#pragma GCC diagnostic pop |
|
#endif |
|
|
|
virtual void zoom(const QwtDoubleRect &); |
|
virtual void zoom(int up); |
|
|
|
signals: |
|
/*! |
|
A signal emitting the zoomRect(), when the plot has been |
|
zoomed in or out. |
|
|
|
\param rect Current zoom rectangle. |
|
*/ |
|
|
|
void zoomed(const QwtDoubleRect &rect); |
|
|
|
protected: |
|
virtual void rescale(); |
|
|
|
virtual QwtDoubleSize minZoomSize() const; |
|
|
|
virtual void widgetMouseReleaseEvent(QMouseEvent *); |
|
virtual void widgetKeyPressEvent(QKeyEvent *); |
|
|
|
virtual void begin(); |
|
virtual bool end(bool ok = true); |
|
virtual bool accept(QwtPolygon &) const; |
|
|
|
private: |
|
void init(int selectionFlags, DisplayMode trackerMode, bool doReplot); |
|
|
|
class PrivateData; |
|
PrivateData *d_data; |
|
}; |
|
|
|
#endif
|
|
|