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152 lines
3.9 KiB
152 lines
3.9 KiB
/* -*- mode: C++ ; c-file-style: "stroustrup" -*- ***************************** |
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* Qwt Widget Library |
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* Copyright (C) 1997 Josef Wilgen |
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* Copyright (C) 2002 Uwe Rathmann |
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* |
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* This library is free software; you can redistribute it and/or |
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* modify it under the terms of the Qwt License, Version 1.0 |
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*****************************************************************************/ |
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#ifndef QWT_PICKER_MACHINE |
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#define QWT_PICKER_MACHINE 1 |
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#include "qwt_global.h" |
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#if QT_VERSION < 0x040000 |
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#include <qvaluelist.h> |
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#else |
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#include <qlist.h> |
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#endif |
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class QEvent; |
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class QwtEventPattern; |
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/*! |
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\brief A state machine for QwtPicker selections |
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QwtPickerMachine accepts key and mouse events and translates them |
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into selection commands. |
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\sa QwtEventPattern::MousePatternCode, QwtEventPattern::KeyPatternCode |
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*/ |
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class QWT_EXPORT QwtPickerMachine |
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{ |
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public: |
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//! Commands - the output of the state machine |
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enum Command { |
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Begin, |
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Append, |
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Move, |
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End |
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}; |
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#if QT_VERSION < 0x040000 |
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typedef QValueList<Command> CommandList; |
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#else |
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typedef QList<Command> CommandList; |
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#endif |
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virtual ~QwtPickerMachine(); |
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//! Transition |
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virtual CommandList transition( |
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const QwtEventPattern &, const QEvent *) = 0; |
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void reset(); |
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int state() const; |
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void setState(int); |
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protected: |
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QwtPickerMachine(); |
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private: |
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int d_state; |
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}; |
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/*! |
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\brief A state machine for point selections |
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Pressing QwtEventPattern::MouseSelect1 or |
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QwtEventPattern::KeySelect1 selects a point. |
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\sa QwtEventPattern::MousePatternCode, QwtEventPattern::KeyPatternCode |
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*/ |
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class QWT_EXPORT QwtPickerClickPointMachine: public QwtPickerMachine |
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{ |
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public: |
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virtual CommandList transition( |
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const QwtEventPattern &, const QEvent *); |
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}; |
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/*! |
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\brief A state machine for point selections |
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Pressing QwtEventPattern::MouseSelect1 or QwtEventPattern::KeySelect1 |
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starts the selection, releasing QwtEventPattern::MouseSelect1 or |
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a second press of QwtEventPattern::KeySelect1 terminates it. |
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*/ |
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class QWT_EXPORT QwtPickerDragPointMachine: public QwtPickerMachine |
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{ |
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public: |
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virtual CommandList transition( |
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const QwtEventPattern &, const QEvent *); |
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}; |
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/*! |
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\brief A state machine for rectangle selections |
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Pressing QwtEventPattern::MouseSelect1 starts |
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the selection, releasing it selects the first point. Pressing it |
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again selects the second point and terminates the selection. |
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Pressing QwtEventPattern::KeySelect1 also starts the |
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selection, a second press selects the first point. A third one selects |
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the second point and terminates the selection. |
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\sa QwtEventPattern::MousePatternCode, QwtEventPattern::KeyPatternCode |
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*/ |
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class QWT_EXPORT QwtPickerClickRectMachine: public QwtPickerMachine |
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{ |
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public: |
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virtual CommandList transition( |
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const QwtEventPattern &, const QEvent *); |
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}; |
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/*! |
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\brief A state machine for rectangle selections |
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Pressing QwtEventPattern::MouseSelect1 selects |
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the first point, releasing it the second point. |
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Pressing QwtEventPattern::KeySelect1 also selects the |
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first point, a second press selects the second point and terminates |
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the selection. |
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\sa QwtEventPattern::MousePatternCode, QwtEventPattern::KeyPatternCode |
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*/ |
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class QWT_EXPORT QwtPickerDragRectMachine: public QwtPickerMachine |
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{ |
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public: |
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virtual CommandList transition( |
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const QwtEventPattern &, const QEvent *); |
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}; |
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/*! |
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\brief A state machine for polygon selections |
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Pressing QwtEventPattern::MouseSelect1 or QwtEventPattern::KeySelect1 |
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starts the selection and selects the first point, or appends a point. |
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Pressing QwtEventPattern::MouseSelect2 or QwtEventPattern::KeySelect2 |
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appends the last point and terminates the selection. |
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\sa QwtEventPattern::MousePatternCode, QwtEventPattern::KeyPatternCode |
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*/ |
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class QWT_EXPORT QwtPickerPolygonMachine: public QwtPickerMachine |
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{ |
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public: |
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virtual CommandList transition( |
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const QwtEventPattern &, const QEvent *); |
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}; |
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#endif
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