AAX_CPercentDisplayDelegateDecorator.h

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/*================================================================================================*/
/*
 *
 *  Copyright 2014-2017, 2019, 2023 Avid Technology, Inc.
 *  All rights reserved.
 *  
 *  CONFIDENTIAL: this document contains confidential information of Avid. Do
 *  not disclose to any third party. Use of the information contained in this
 *  document is subject to an Avid SDK license.
 *
 */
 
/*================================================================================================*/
 
 
#pragma once
 
#ifndef AAX_CPERCENTDISPLAYDELEGATEDECORATOR_H
#define AAX_CPERCENTDISPLAYDELEGATEDECORATOR_H
 
#include "AAX_IDisplayDelegateDecorator.h"
 
#include <cmath>
 
 
template <typename T>
class AAX_CPercentDisplayDelegateDecorator : public AAX_IDisplayDelegateDecorator<T>
{
public:
    AAX_CPercentDisplayDelegateDecorator(const AAX_IDisplayDelegate<T>& displayDelegate);
    
    //Virtual Overrides
    AAX_CPercentDisplayDelegateDecorator<T>*    Clone() const AAX_OVERRIDE;
    bool        ValueToString(T value, AAX_CString* valueString) const AAX_OVERRIDE;
    bool        ValueToString(T value, int32_t maxNumChars, AAX_CString* valueString) const AAX_OVERRIDE;
    bool        StringToValue(const AAX_CString& valueString, T* value) const AAX_OVERRIDE;
};
 
template <typename T>
AAX_CPercentDisplayDelegateDecorator<T>::AAX_CPercentDisplayDelegateDecorator(const AAX_IDisplayDelegate<T>& displayDelegate)  :
    AAX_IDisplayDelegateDecorator<T>(displayDelegate)
{
}
 
template <typename T>
AAX_CPercentDisplayDelegateDecorator<T>*    AAX_CPercentDisplayDelegateDecorator<T>::Clone() const
{
    return new AAX_CPercentDisplayDelegateDecorator(*this);
}
 
template <typename T>
bool AAX_CPercentDisplayDelegateDecorator<T>::ValueToString(T value, AAX_CString* valueString) const 
{
    value *= 100;
    bool succeeded = AAX_IDisplayDelegateDecorator<T>::ValueToString(value, valueString);
    *valueString += AAX_CString("%");
    return succeeded;
}
 
template <typename T>
bool AAX_CPercentDisplayDelegateDecorator<T>::ValueToString(T value, int32_t maxNumChars, AAX_CString* valueString) const 
{
    value *= 100;
    bool succeeded = AAX_IDisplayDelegateDecorator<T>::ValueToString(value, maxNumChars-1, valueString);        //<DMT>  Make room for percentage symbol.
    *valueString += AAX_CString("%");
    return succeeded;
}
 
 
template <typename T>
bool AAX_CPercentDisplayDelegateDecorator<T>::StringToValue(const AAX_CString& valueString, T* value) const
{
    //Just call through if there is obviously no unit string.
    if (valueString.Length() <= 2)
    {
        bool success = AAX_IDisplayDelegateDecorator<T>::StringToValue(valueString, value);
        *value /= 100.0f;
        return success;
    }
 
    //Just call through if the end of this string does not match the unit string.   
    AAX_CString unitSubString;
    valueString.SubString(valueString.Length() - 1, 1, &unitSubString);
    if (unitSubString != AAX_CString("%"))
    {
        bool success = AAX_IDisplayDelegateDecorator<T>::StringToValue(valueString, value);
        *value /= 100.0f;
        return success;
    }
 
    //Call through with the stripped down value string.  
    AAX_CString valueSubString;
    valueString.SubString(0, valueString.Length() - 1, &valueSubString);
    bool success = AAX_IDisplayDelegateDecorator<T>::StringToValue(valueSubString, value);
    *value /= 100.0f;
    return success;
}
 
 
#endif