EnumCameraParameter.cpp

/*----------------------------------------------------------------------------*/
/* Copyright (c) FIRST 2008. All Rights Reserved.                                                         */
/* Open Source Software - may be modified and shared by FRC teams. The code   */
/* must be accompanied by the FIRST BSD license file in $(WIND_BASE)/WPILib.  */
/*----------------------------------------------------------------------------*/

#include "EnumCameraParameter.h"
#include <stdio.h>
#include <string.h>

EnumCameraParameter::EnumCameraParameter(const char *setString, const char *getString, bool requiresRestart,
                                                                                                        const char *const*choices, int numChoices)
        : IntCameraParameter(setString, getString, requiresRestart)
{
        m_enumValues = choices;
        m_numChoices = numChoices;
}

/*
 * Check if an enumeration camera parameter has changed.
 * Check if the parameter has changed and update the camera if it has. This is called
 * from a loop in the parameter checker task.
 * @returns true if the camera needs to restart
 */
bool EnumCameraParameter::CheckChanged(bool &changed, char *param)
{
        changed = m_changed;
        if (m_changed)
        {
                m_changed = false;
                sprintf(param, m_setString, m_enumValues[m_value]);
                return m_requiresRestart;
        }
        return false;
}

void EnumCameraParameter::GetParamFromString(const char *string, int stringLength)
{
        char resultString[50];
        if (SearchForParam(m_getString, string, stringLength, resultString) < 0) return;
        for (int i = 0; i < m_numChoices; i++)
        {
                if (strcmp(resultString, m_enumValues[i]) == 0)
                {
                        if (!m_changed)   // don't change parameter that's been set in code
                        {
                                m_value = i;
                        }
                }
        }
}