Program Listing for File pvControl.h

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/* pvControl.h */
/*
 * Copyright information and license terms for this software can be
 * found in the file LICENSE that is included with the distribution
 */
#ifndef PVCONTROL_H
#define PVCONTROL_H

#include <pv/pvData.h>
#include <pv/control.h>

#include <shareLib.h>

namespace epics { namespace pvData {

class epicsShareClass PVControl {
public:
    PVControl(){}
    //default constructors and destructor are OK
    //returns (false,true) if pvField(is not, is) a valid control structure
    //An automatic detach is issued if already attached.
    /*
     * Attach to a field of a PVData object.
     * @param pvField The pvField.
     * @return (false,true) if the pvField (is not, is) an control structure.
     */
    bool attach(PVFieldPtr const & pvField);
    void detach();
    bool isAttached();
    // each of the following throws logic_error if not attached to PVField
    // set returns false if field is immutable
    void get(Control & control) const;
    bool set(Control const & control);
private:
    PVDoublePtr pvLow;
    PVDoublePtr pvHigh;
    PVDoublePtr pvMinStep;
    static std::string noControlFound;
    static std::string notAttached;
};

}}
#endif  /* PVCONTROL_H */