Qwt User's Guide  6.1.0
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QwtPickerClickRectMachine Class Reference

A state machine for rectangle selections. More...

#include <qwt_picker_machine.h>

Inheritance diagram for QwtPickerClickRectMachine:
Inheritance graph
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Public Member Functions

 QwtPickerClickRectMachine ()
 Constructor.
 
virtual QList< Commandtransition (const QwtEventPattern &, const QEvent *)
 Transition.
 
- Public Member Functions inherited from QwtPickerMachine
 QwtPickerMachine (SelectionType)
 Constructor.
 
virtual ~QwtPickerMachine ()
 Destructor.
 
void reset ()
 Set the current state to 0.
 
int state () const
 Return the current state.
 
void setState (int)
 Change the current state.
 
SelectionType selectionType () const
 Return the selection type.
 

Additional Inherited Members

- Public Types inherited from QwtPickerMachine
enum  SelectionType { NoSelection = -1, PointSelection, RectSelection, PolygonSelection }
 
enum  Command {
  Begin, Append, Move, Remove,
  End
}
 Commands - the output of a state machine.
 

Detailed Description

A state machine for rectangle selections.

Pressing QwtEventPattern::MouseSelect1 starts the selection, releasing it selects the first point. Pressing it again selects the second point and terminates the selection. Pressing QwtEventPattern::KeySelect1 also starts the selection, a second press selects the first point. A third one selects the second point and terminates the selection.

See Also
QwtEventPattern::MousePatternCode, QwtEventPattern::KeyPatternCode