remove DynamicThemeMetric

This commit is contained in:
Glenn Maynard
2007-04-10 17:55:38 +00:00
parent eac521e34a
commit bebfffc4b1
-127
View File
@@ -266,133 +266,6 @@ public:
}
};
/*
* Like ThemeMetric, but allows evaluating Lua expressions each time. This is
* fast, since we only compile the expression once. To evaluate every time,
* return a function instead of a value.
*
* This is just as fast as ThemeMetric when the value is not a function.
*/
template <class T>
class DynamicThemeMetric : public IThemeMetric
{
protected:
RString m_sGroup;
RString m_sName;
mutable T m_currentValue;
bool m_bIsLoaded;
LuaReference m_Value;
public:
/* Initializing with no group and name is allowed; if you do this, you must
* call Load() to set them. This is done to allow initializing cached metrics
* in one place for classes that don't receive their m_sName in the constructor
* (everything except screens). */
DynamicThemeMetric( const RString& sGroup = "", const RString& sName = "" ):
m_sGroup( sGroup ),
m_sName( sName ),
m_bIsLoaded( false )
{
m_currentValue = T();
ThemeManager::Subscribe( this );
}
DynamicThemeMetric( const ThemeMetric<T> &cpy ):
IThemeMetric( cpy ),
m_sGroup( cpy.m_sGroup ),
m_sName( cpy.m_sName ),
m_currentValue( cpy.m_currentValue ),
m_bIsLoaded( cpy.m_bIsLoaded ),
m_Value( cpy.m_Value )
{
ThemeManager::Subscribe( this );
}
~DynamicThemeMetric()
{
ThemeManager::Unsubscribe( this );
}
void Load( const RString &sGroup, const RString& sName )
{
m_sGroup = sGroup;
m_sName = sName;
Read();
}
void ChangeGroup( const RString &sGroup )
{
m_sGroup = sGroup;
Read();
}
void Read()
{
if( m_sName != "" && THEME && THEME->IsThemeLoaded() )
{
Lua *L = LUA->Get();
THEME->GetMetric( m_sGroup, m_sName, m_Value );
m_Value.PushSelf( L );
if( lua_type(L, -1) == LUA_TFUNCTION )
{
lua_pop( L, 1 );
}
else
{
m_Value.Unset();
LuaHelpers::Pop( L, m_currentValue );
}
LUA->Release(L);
m_bIsLoaded = true;
}
}
void Clear()
{
m_Value.Unset();
m_bIsLoaded = false;
}
const T& GetValue() const
{
ASSERT( m_sName != "" );
ASSERT( m_bIsLoaded );
/* If the value is a function, evaluate it every time. */
if( m_Value.IsSet() )
{
Lua *L = LUA->Get();
// call function with 0 arguments and 1 result
m_Value.PushSelf( L );
lua_call(L, 0, 1);
ASSERT( !lua_isnil(L, -1) );
LuaHelpers::Pop( L, m_currentValue );
LUA->Release(L);
}
return m_currentValue;
}
operator const T& () const
{
return GetValue();
}
bool IsLoaded() const { return m_bIsLoaded; }
//Hacks for VC6 for all boolean operators.
bool operator ! () const { return !GetValue(); }
bool operator && ( const T& input ) const { return GetValue() && input; }
bool operator || ( const T& input ) const { return GetValue() || input; }
bool operator == ( const T& input ) const { return GetValue() == input; }
};
#endif
/*