AAX SDK  2.4.1
Avid Audio Extensions Development Kit
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AAX_CPercentDisplayDelegateDecorator< T > Class Template Reference

#include <AAX_CPercentDisplayDelegateDecorator.h>

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Description

template<typename T>
class AAX_CPercentDisplayDelegateDecorator< T >

A percent decorator conforming to AAX_IDisplayDelegateDecorator.

This class is an AAX_IDisplayDelegateDecorator, meaning that it acts as a wrapper for other display delegates or concrete display types. For more information about display delegate decorators in AAX, see Display delegate decorators

The behavior of this class it to provide string conversion to and from percentage (%) values. When converting a parameter value to a string, it takes the real value and performs a % conversion before passing the value on to a concrete implementation to get a value string. It then adds on the "%" string at the end to signify that the value was converted. This allows something like a gain value to remain internally linear at all times even though its display is converted to a percentage.

The inverse operation is also supported; this class can convert a percentage-formatted string into its associated real value. The string will first be converted to a number, then that number will have the inverse % calculation applied to it to retrieve the parameter's actual value.

Public Member Functions

 AAX_CPercentDisplayDelegateDecorator (const AAX_IDisplayDelegate< T > &displayDelegate)
 
AAX_CPercentDisplayDelegateDecorator< T > * Clone () const AAX_OVERRIDE
 Constructs and returns a copy of the display delegate. More...
 
bool ValueToString (T value, AAX_CString *valueString) const AAX_OVERRIDE
 Converts a real parameter value to a string representation. More...
 
bool ValueToString (T value, int32_t maxNumChars, AAX_CString *valueString) const AAX_OVERRIDE
 Converts a real parameter value to a string representation using a size hint, useful for control surfaces and other character limited displays. More...
 
bool StringToValue (const AAX_CString &valueString, T *value) const AAX_OVERRIDE
 Converts a string to a real parameter value. More...
 
- Public Member Functions inherited from AAX_IDisplayDelegateDecorator< T >
 AAX_IDisplayDelegateDecorator (const AAX_IDisplayDelegate< T > &displayDelegate)
 Constructor. More...
 
 AAX_IDisplayDelegateDecorator (const AAX_IDisplayDelegateDecorator &other)
 Copy constructor. More...
 
 ~AAX_IDisplayDelegateDecorator () AAX_OVERRIDE
 Virtual destructor. More...
 
AAX_IDisplayDelegateDecorator< T > * Clone () const AAX_OVERRIDE
 Constructs and returns a copy of the display delegate decorator. More...
 
bool ValueToString (T value, AAX_CString *valueString) const AAX_OVERRIDE
 Converts a string to a real parameter value. More...
 
bool ValueToString (T value, int32_t maxNumChars, AAX_CString *valueString) const AAX_OVERRIDE
 Converts a string to a real parameter value with a size constraint. More...
 
bool StringToValue (const AAX_CString &valueString, T *value) const AAX_OVERRIDE
 Converts a string to a real parameter value. More...
 
- Public Member Functions inherited from AAX_IDisplayDelegateBase
virtual ~AAX_IDisplayDelegateBase ()
 Virtual destructor. More...
 

Constructor & Destructor Documentation

◆ AAX_CPercentDisplayDelegateDecorator()

template<typename T >
AAX_CPercentDisplayDelegateDecorator< T >::AAX_CPercentDisplayDelegateDecorator ( const AAX_IDisplayDelegate< T > &  displayDelegate)

Member Function Documentation

◆ Clone()

template<typename T >
AAX_CPercentDisplayDelegateDecorator< T > * AAX_CPercentDisplayDelegateDecorator< T >::Clone ( ) const
virtual

Constructs and returns a copy of the display delegate.

In general, this method's implementation can use a simple copy constructor:

template <typename T>
AAX_CSubclassDisplayDelegate<T>* AAX_CSubclassDisplayDelegate<T>::Clone() const
{
return new AAX_CSubclassDisplayDelegate(*this);
}

Implements AAX_IDisplayDelegate< T >.

◆ ValueToString() [1/2]

template<typename T >
bool AAX_CPercentDisplayDelegateDecorator< T >::ValueToString ( value,
AAX_CString valueString 
) const
virtual

Converts a real parameter value to a string representation.

Parameters
[in]valueThe real parameter value that will be converted
[out]valueStringA string corresponding to value
Return values
trueThe string conversion was successful
falseThe string conversion was unsuccessful

Implements AAX_IDisplayDelegate< T >.

References AAX_IDisplayDelegateDecorator< T >::ValueToString().

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◆ ValueToString() [2/2]

template<typename T >
bool AAX_CPercentDisplayDelegateDecorator< T >::ValueToString ( value,
int32_t  maxNumChars,
AAX_CString valueString 
) const
virtual

Converts a real parameter value to a string representation using a size hint, useful for control surfaces and other character limited displays.

Parameters
[in]valueThe real parameter value that will be converted
[in]maxNumCharsSize hint for the desired maximum number of characters in the string (not including null termination)
[out]valueStringA string corresponding to value
Return values
trueThe string conversion was successful
falseThe string conversion was unsuccessful

Implements AAX_IDisplayDelegate< T >.

References AAX_IDisplayDelegateDecorator< T >::ValueToString().

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◆ StringToValue()

template<typename T >
bool AAX_CPercentDisplayDelegateDecorator< T >::StringToValue ( const AAX_CString valueString,
T *  value 
) const
virtual

Converts a string to a real parameter value.

Parameters
[in]valueStringThe string that will be converted
[out]valueThe real parameter value corresponding to valueString
Return values
trueThe string conversion was successful
falseThe string conversion was unsuccessful

Implements AAX_IDisplayDelegate< T >.

References AAX_CString::Length(), AAX_IDisplayDelegateDecorator< T >::StringToValue(), and AAX_CString::SubString().

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The documentation for this class was generated from the following file: