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qwt_picker_machine.h

00001 /* -*- mode: C++ ; c-file-style: "stroustrup" -*- ***************************** 00002 * Qwt Widget Library 00003 * Copyright (C) 1997 Josef Wilgen 00004 * Copyright (C) 2002 Uwe Rathmann 00005 * 00006 * This library is free software; you can redistribute it and/or 00007 * modify it under the terms of the Qwt License, Version 1.0 00008 *****************************************************************************/ 00009 00010 #ifndef QWT_PICKER_MACHINE 00011 #define QWT_PICKER_MACHINE 1 00012 00013 #include <qvaluelist.h> 00014 #include "qwt_array.h" 00015 00016 class QEvent; 00017 class QwtEventPattern; 00018 00028 class QWT_EXPORT QwtPickerMachine 00029 { 00030 public: 00031 enum Command 00032 { 00033 Begin, 00034 Append, 00035 Move, 00036 End 00037 }; 00038 00039 virtual ~QwtPickerMachine(); 00040 00042 virtual QValueList<Command> transition( 00043 const QwtEventPattern &, const QEvent *) = 0; 00044 void reset(); 00045 00046 protected: 00047 QwtPickerMachine(); 00048 00049 int state() const; 00050 void setState(int); 00051 00052 private: 00053 int d_state; 00054 }; 00055 00064 class QWT_EXPORT QwtPickerClickPointMachine: public QwtPickerMachine 00065 { 00066 public: 00067 virtual QValueList<Command> transition( 00068 const QwtEventPattern &, const QEvent *); 00069 }; 00070 00078 class QWT_EXPORT QwtPickerDragPointMachine: public QwtPickerMachine 00079 { 00080 public: 00081 virtual QValueList<Command> transition( 00082 const QwtEventPattern &, const QEvent *); 00083 }; 00084 00098 class QWT_EXPORT QwtPickerClickRectMachine: public QwtPickerMachine 00099 { 00100 public: 00101 virtual QValueList<Command> transition( 00102 const QwtEventPattern &, const QEvent *); 00103 }; 00104 00117 class QWT_EXPORT QwtPickerDragRectMachine: public QwtPickerMachine 00118 { 00119 public: 00120 virtual QValueList<Command> transition( 00121 const QwtEventPattern &, const QEvent *); 00122 }; 00123 00135 class QWT_EXPORT QwtPickerPolygonMachine: public QwtPickerMachine 00136 { 00137 public: 00138 virtual QValueList<Command> transition( 00139 const QwtEventPattern &, const QEvent *); 00140 }; 00141 00142 #endif

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