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00010 #ifndef QWT_PICKER_MACHINE
00011 #define QWT_PICKER_MACHINE 1
00012
00013 #include "qwt_global.h"
00014 #if QT_VERSION < 0x040000
00015 #include <qvaluelist.h>
00016 #else
00017 #include <qlist.h>
00018 #endif
00019
00020 class QEvent;
00021 class QwtEventPattern;
00022
00032 class QWT_EXPORT QwtPickerMachine
00033 {
00034 public:
00035 enum Command
00036 {
00037 Begin,
00038 Append,
00039 Move,
00040 End
00041 };
00042
00043 #if QT_VERSION < 0x040000
00044 typedef QValueList<Command> CommandList;
00045 #else
00046 typedef QList<Command> CommandList;
00047 #endif
00048
00049 virtual ~QwtPickerMachine();
00050
00052 virtual CommandList transition(
00053 const QwtEventPattern &, const QEvent *) = 0;
00054 void reset();
00055
00056 protected:
00057 QwtPickerMachine();
00058
00059 int state() const;
00060 void setState(int);
00061
00062 private:
00063 int d_state;
00064 };
00065
00074 class QWT_EXPORT QwtPickerClickPointMachine: public QwtPickerMachine
00075 {
00076 public:
00077 virtual CommandList transition(
00078 const QwtEventPattern &, const QEvent *);
00079 };
00080
00088 class QWT_EXPORT QwtPickerDragPointMachine: public QwtPickerMachine
00089 {
00090 public:
00091 virtual CommandList transition(
00092 const QwtEventPattern &, const QEvent *);
00093 };
00094
00108 class QWT_EXPORT QwtPickerClickRectMachine: public QwtPickerMachine
00109 {
00110 public:
00111 virtual CommandList transition(
00112 const QwtEventPattern &, const QEvent *);
00113 };
00114
00127 class QWT_EXPORT QwtPickerDragRectMachine: public QwtPickerMachine
00128 {
00129 public:
00130 virtual CommandList transition(
00131 const QwtEventPattern &, const QEvent *);
00132 };
00133
00145 class QWT_EXPORT QwtPickerPolygonMachine: public QwtPickerMachine
00146 {
00147 public:
00148 virtual CommandList transition(
00149 const QwtEventPattern &, const QEvent *);
00150 };
00151
00152 #endif