public void MusicSource(MainWindow win)
{
if (win.IsLoaded)
{
win.GridSelectionsFilters.Visibility = System.Windows.Visibility.Hidden;
win.GridMusicFilters.Visibility = System.Windows.Visibility.Visible;
win.SecondBox.Visibility = System.Windows.Visibility.Visible;
win.WrapBox.Visibility = System.Windows.Visibility.Hidden;
win.MainBox.Visibility = System.Windows.Visibility.Visible;
win.SecondBox.ItemsSource = null;
win.clickStyle_ = ClickStyle.MUSIC;
win.WrapBox.ItemsSource = null;
win.MainBox.Visibility = System.Windows.Visibility.Visible;
win.SecondBox.ItemTemplate = win.FindResource("SecondMusicTemplate") as DataTemplate;
DelegateTemplate[] tab = new DelegateTemplate[3];
tab[0] = new DelegateTemplate(this.AlbumTemplate);
tab[1] = new DelegateTemplate(this.ArtistTemplate);
tab[2] = new DelegateTemplate(this.GenreTemplate);
tab[(int)win.musicStyle_](win);
}
}
public Delegate MakeDelegate(Type targetDelegateType)
{
//check if we already has cache delegate for handle the targetDelegateType
//if not found then create a new one
DelegateTemplate foundTemplate;
if (this._context.GetCacheDelegateForType(targetDelegateType, out foundTemplate))
{
//found sample
//the create new holder from sample template
return foundTemplate.CreateNewDelegate(targetDelegateType, this);
}
//----------------------------------------------------------------------------------
if (targetDelegateType.BaseType != typeof(MulticastDelegate))
{
throw new ApplicationException("Not a delegate.");
}
MethodInfo invoke = targetDelegateType.GetMethod("Invoke");
if (invoke == null)
{
throw new ApplicationException("Not a delegate.");
}
ParameterInfo[] invokeParams = invoke.GetParameters();
int argCount = invokeParams.Length;
Type returnType = invoke.ReturnType;
bool returnVoid = returnType == typeof(void);
Type[] typelist = null;
if (returnVoid)
{
typelist = new Type[argCount];
for (int i = 0; i < argCount; ++i)
{
typelist[i] = invokeParams[i].ParameterType;
}
}
else
{
typelist = new Type[argCount + 1]; //+1 for return type
for (int i = 0; i < argCount; ++i)
{
typelist[i] = invokeParams[i].ParameterType;
}
typelist[argCount] = returnType;
}
//----------------------------------
//create delegate holder
//you can add more than 1
Type delHolderType = null;
switch (argCount)
{
case 0:
{
//0 input
delHolderType = returnVoid ?
typeof(ActionDelegateHolder) :
typeof(FuncDelegateHolder<>).MakeGenericType(typelist);
} break;
case 1:
{
//1 input
delHolderType = returnVoid ?
typeof(ActionDelegateHolder<>).MakeGenericType(typelist) :
typeof(FuncDelegateHolder<,>).MakeGenericType(typelist);
} break;
case 2:
{
delHolderType = returnVoid ?
typeof(ActionDelegateHolder<,>).MakeGenericType(typelist) :
typeof(FuncDelegateHolder<,,>).MakeGenericType(typelist);
} break;
case 3:
{
delHolderType = returnVoid ?
typeof(ActionDelegateHolder<,,>).MakeGenericType(typelist) :
typeof(FuncDelegateHolder<,,,>).MakeGenericType(typelist);
} break;
case 4:
{
delHolderType = returnVoid ?
typeof(ActionDelegateHolder<,,,>).MakeGenericType(typelist) :
typeof(FuncDelegateHolder<,,,,>).MakeGenericType(typelist);
} break;
default:
{
//create more if you want
throw new NotSupportedException();
}
}
//----------------------------------
//create sample
DelegateTemplate newTemplate = new DelegateTemplate(
delHolderType,
Activator.CreateInstance(delHolderType) as DelegateHolder);
//cache
this._context.CacheDelegateForType(targetDelegateType, newTemplate);
//new delegate created from sample
return newTemplate.CreateNewDelegate(targetDelegateType, this);
}