@ -31,370 +31,370 @@ using Xceed.Wpf.DataGrid.Converters;
namespace Xceed.Wpf.DataGrid
{
internal sealed class GenericContentTemplateSelector : DataTemplateSelector
{
#region Static Fields
internal sealed class GenericContentTemplateSelector : DataTemplateSelector
{
#region Static Fields
internal static readonly DataTemplate ForeignKeyCellContentTemplate ;
internal static readonly DataTemplate ForeignKeyGroupValueTemplate ;
internal static readonly DataTemplate ForeignKeyScrollTipContentTemplate ;
internal static readonly DataTemplate ForeignKeyCellContentTemplate ;
internal static readonly DataTemplate ForeignKeyGroupValueTemplate ;
internal static readonly DataTemplate ForeignKeyScrollTipContentTemplate ;
private static readonly DataTemplate BoolTemplate ;
private static readonly DataTemplate CommonTemplate ;
private static readonly DataTemplate ImageTemplate ;
private static readonly DataTemplate BoolTemplate ;
private static readonly DataTemplate CommonTemplate ;
private static readonly DataTemplate ImageTemplate ;
private static readonly List < KeyValuePair < Type , WeakReference > > DefaultTemplates = new List < KeyValuePair < Type , WeakReference > > ( 0 ) ;
private static readonly List < KeyValuePair < Type , WeakReference > > DefaultTemplates = new List < KeyValuePair < Type , WeakReference > > ( 0 ) ;
private static readonly GenericContentTemplateSelectorResources GenericContentTemplateResources = new GenericContentTemplateSelectorResources ( ) ;
private static readonly GenericContentTemplateSelectorResources GenericContentTemplateResources = new GenericContentTemplateSelectorResources ( ) ;
private static Func < DependencyObject , object , Type , object > FindTemplateResource ; //null
private static Func < DependencyObject , object , Type , object > FindTemplateResource ; //null
#endregion
#endregion
#region Constructors
#region Constructors
static GenericContentTemplateSelector ( )
{
// We need to initalize the ResourceDictionary before accessing since we access
// it in a static constructor and will be called before the Layout was performed
GenericContentTemplateSelector . GenericContentTemplateResources . InitializeComponent ( ) ;
static GenericContentTemplateSelector ( )
{
// We need to initalize the ResourceDictionary before accessing since we access
// it in a static constructor and will be called before the Layout was performed
GenericContentTemplateSelector . GenericContentTemplateResources . InitializeComponent ( ) ;
GenericContentTemplateSelector . BoolTemplate = GenericContentTemplateSelector . GenericContentTemplateResources [ "booleanDefaultContentTemplate" ] as DataTemplate ;
Debug . Assert ( GenericContentTemplateSelector . BoolTemplate ! = null ) ;
GenericContentTemplateSelector . BoolTemplate . Seal ( ) ;
GenericContentTemplateSelector . BoolTemplate = GenericContentTemplateSelector . GenericContentTemplateResources [ "booleanDefaultContentTemplate" ] as DataTemplate ;
Debug . Assert ( GenericContentTemplateSelector . BoolTemplate ! = null ) ;
GenericContentTemplateSelector . BoolTemplate . Seal ( ) ;
GenericContentTemplateSelector . CommonTemplate = GenericContentTemplateSelector . GenericContentTemplateResources [ "commonDefaultContentTemplate" ] as DataTemplate ;
Debug . Assert ( GenericContentTemplateSelector . CommonTemplate ! = null ) ;
GenericContentTemplateSelector . CommonTemplate . Seal ( ) ;
GenericContentTemplateSelector . CommonTemplate = GenericContentTemplateSelector . GenericContentTemplateResources [ "commonDefaultContentTemplate" ] as DataTemplate ;
Debug . Assert ( GenericContentTemplateSelector . CommonTemplate ! = null ) ;
GenericContentTemplateSelector . CommonTemplate . Seal ( ) ;
GenericContentTemplateSelector . ImageTemplate = GenericContentTemplateSelector . GenericContentTemplateResources [ "imageDefaultContentTemplate" ] as DataTemplate ;
Debug . Assert ( GenericContentTemplateSelector . ImageTemplate ! = null ) ;
GenericContentTemplateSelector . ImageTemplate . Seal ( ) ;
GenericContentTemplateSelector . ImageTemplate = GenericContentTemplateSelector . GenericContentTemplateResources [ "imageDefaultContentTemplate" ] as DataTemplate ;
Debug . Assert ( GenericContentTemplateSelector . ImageTemplate ! = null ) ;
GenericContentTemplateSelector . ImageTemplate . Seal ( ) ;
GenericContentTemplateSelector . ForeignKeyCellContentTemplate = GenericContentTemplateSelector . GenericContentTemplateResources [ "foreignKeyDefaultContentTemplate" ] as DataTemplate ;
Debug . Assert ( GenericContentTemplateSelector . ForeignKeyCellContentTemplate ! = null ) ;
GenericContentTemplateSelector . ForeignKeyCellContentTemplate . Seal ( ) ;
GenericContentTemplateSelector . ForeignKeyCellContentTemplate = GenericContentTemplateSelector . GenericContentTemplateResources [ "foreignKeyDefaultContentTemplate" ] as DataTemplate ;
Debug . Assert ( GenericContentTemplateSelector . ForeignKeyCellContentTemplate ! = null ) ;
GenericContentTemplateSelector . ForeignKeyCellContentTemplate . Seal ( ) ;
GenericContentTemplateSelector . ForeignKeyGroupValueTemplate = GenericContentTemplateSelector . GenericContentTemplateResources [ "foreignKeyGroupValueDefaultContentTemplate" ] as DataTemplate ;
Debug . Assert ( GenericContentTemplateSelector . ForeignKeyGroupValueTemplate ! = null ) ;
GenericContentTemplateSelector . ForeignKeyGroupValueTemplate . Seal ( ) ;
GenericContentTemplateSelector . ForeignKeyGroupValueTemplate = GenericContentTemplateSelector . GenericContentTemplateResources [ "foreignKeyGroupValueDefaultContentTemplate" ] as DataTemplate ;
Debug . Assert ( GenericContentTemplateSelector . ForeignKeyGroupValueTemplate ! = null ) ;
GenericContentTemplateSelector . ForeignKeyGroupValueTemplate . Seal ( ) ;
GenericContentTemplateSelector . ForeignKeyScrollTipContentTemplate = GenericContentTemplateSelector . GenericContentTemplateResources [ "foreignKeyScrollTipDefaultContentTemplate" ] as DataTemplate ;
Debug . Assert ( GenericContentTemplateSelector . ForeignKeyScrollTipContentTemplate ! = null ) ;
GenericContentTemplateSelector . ForeignKeyScrollTipContentTemplate . Seal ( ) ;
}
GenericContentTemplateSelector . ForeignKeyScrollTipContentTemplate = GenericContentTemplateSelector . GenericContentTemplateResources [ "foreignKeyScrollTipDefaultContentTemplate" ] as DataTemplate ;
Debug . Assert ( GenericContentTemplateSelector . ForeignKeyScrollTipContentTemplate ! = null ) ;
GenericContentTemplateSelector . ForeignKeyScrollTipContentTemplate . Seal ( ) ;
}
private GenericContentTemplateSelector ( )
{
}
private GenericContentTemplateSelector ( )
{
}
#endregion
#endregion
#region Instance Static Property
#region Instance Static Property
public static GenericContentTemplateSelector Instance
{
get
{
return m_instance ;
}
}
public static GenericContentTemplateSelector Instance
{
get
{
return m_instance ;
}
}
private static GenericContentTemplateSelector m_instance = new GenericContentTemplateSelector ( ) ;
private static GenericContentTemplateSelector m_instance = new GenericContentTemplateSelector ( ) ;
#endregion
#endregion
public override DataTemplate SelectTemplate ( object item , DependencyObject container )
{
if ( item = = null )
return base . SelectTemplate ( item , container ) ;
public override DataTemplate SelectTemplate ( object item , DependencyObject container )
{
if ( item = = null )
return base . SelectTemplate ( item , container ) ;
DataTemplate template = null ;
DataTemplate template = null ;
if ( ( item is byte [ ] ) | | ( item is System . Drawing . Image ) )
{
bool useImageTemplate = false ;
if ( ( item is byte [ ] ) /*|| (item is System.Drawing.Image)*/ )
{
bool useImageTemplate = false ;
try
{
var converter = new ImageConverter ( ) ;
useImageTemplate = ( converter . Convert ( item , typeof ( ImageSource ) , null , CultureInfo . CurrentCulture ) ! = null ) ;
}
catch ( NotSupportedException )
{
//suppress the exception, the byte[] is not an image. convertedValue will remain null
}
if ( useImageTemplate )
{
template = GenericContentTemplateSelector . GetImageTemplate ( container ) ;
}
}
else if ( item is ImageSource )
{
template = GenericContentTemplateSelector . GetImageTemplate ( container ) ;
}
else if ( item is bool )
{
template = GenericContentTemplateSelector . BoolTemplate ;
}
try
{
var converter = new ImageConverter ( ) ;
useImageTemplate = ( converter . Convert ( item , typeof ( ImageSource ) , null , CultureInfo . CurrentCulture ) ! = null ) ;
if ( template = = null )
{
template = GenericContentTemplateSelector . GetCommonTemplate ( item , container ) ;
}
if ( template ! = null )
return template ;
return base . SelectTemplate ( item , container ) ;
}
catch ( NotSupportedException )
private static DataTemplate GetImageTemplate ( DependencyObject container )
{
//suppress the exception, the byte[] is not an image. convertedValue will remain null
return GenericContentTemplateSelector . ImageTemplate ;
}
if ( useImageTemplate )
private static DataTemplate GetCommonTemplate ( object item , DependencyObject container )
{
template = GenericContentTemplateSelector . GetImageTemplate ( container ) ;
}
}
else if ( item is ImageSource )
{
template = GenericContentTemplateSelector . GetImageTemplate ( container ) ;
}
else if ( item is bool )
{
template = GenericContentTemplateSelector . BoolTemplate ;
}
if ( template = = null )
{
template = GenericContentTemplateSelector . GetCommonTemplate ( item , container ) ;
}
if ( template ! = null )
return template ;
return base . SelectTemplate ( item , container ) ;
}
Debug . Assert ( item ! = null ) ;
private static DataTemplate GetImageTemplate ( DependencyObject container )
{
return GenericContentTemplateSelector . ImageTemplate ;
}
var itemType = item . GetType ( ) ;
private static DataTemplate GetCommonTemplate ( object item , DependencyObject container )
{
Debug . Assert ( item ! = null ) ;
// Do not provide a template for data types that are already optimized by the framework or
// for data types that have a default template.
if ( GenericContentTemplateSelector . IsTypeOptimized ( itemType )
| | GenericContentTemplateSelector . HasImplicitTemplate ( item , itemType , container ) )
return null ;
var itemType = item . GetType ( ) ;
return GenericContentTemplateSelector . GetDefaultTemplate ( itemType ) ;
}
// Do not provide a template for data types that are already optimized by the framework or
// for data types that have a default template.
if ( GenericContentTemplateSelector . IsTypeOptimized ( itemType )
| | GenericContentTemplateSelector . HasImplicitTemplate ( item , itemType , container ) )
return null ;
private static DataTemplate GetDefaultTemplate ( Type type )
{
Debug . Assert ( type ! = null ) ;
return GenericContentTemplateSelector . GetDefaultTemplate ( itemType ) ;
}
var converter = TypeDescriptor . GetConverter ( type ) ;
if ( ( converter = = null ) | | ( ! converter . CanConvertTo ( typeof ( string ) ) ) )
return GenericContentTemplateSelector . CommonTemplate ;
private static DataTemplate GetDefaultTemplate ( Type type )
{
Debug . Assert ( type ! = null ) ;
var templates = GenericContentTemplateSelector . DefaultTemplates ;
lock ( ( ( ICollection ) templates ) . SyncRoot )
{
for ( int i = templates . Count - 1 ; i > = 0 ; i - - )
{
var target = templates [ i ] ;
var targetTemplate = target . Value . Target as DataTemplate ;
var converter = TypeDescriptor . GetConverter ( type ) ;
if ( ( converter = = null ) | | ( ! converter . CanConvertTo ( typeof ( string ) ) ) )
return GenericContentTemplateSelector . CommonTemplate ;
// We have found the desired template.
if ( target . Key = = type )
{
if ( targetTemplate ! = null )
return targetTemplate ;
var templates = GenericContentTemplateSelector . DefaultTemplates ;
lock ( ( ( ICollection ) templates ) . SyncRoot )
{
for ( int i = templates . Count - 1 ; i > = 0 ; i - - )
{
var target = templates [ i ] ;
var targetTemplate = target . Value . Target as DataTemplate ;
// We have found the desired template.
if ( target . Key = = type )
{
if ( targetTemplate ! = null )
return targetTemplate ;
// Unfortunately, the template has been garbage collected.
templates . RemoveAt ( i ) ;
break ;
}
}
// Unfortunately, the template has been garbage collected.
templates . RemoveAt ( i ) ;
break ;
}
}
templates . TrimExcess ( ) ;
templates . TrimExcess ( ) ;
var template = GenericContentTemplateSelector . CreateDefaultTemplate ( type , converter ) ;
var template = GenericContentTemplateSelector . CreateDefaultTemplate ( type , converter ) ;
templates . Add ( new KeyValuePair < Type , WeakReference > ( type , new WeakReference ( template ) ) ) ;
templates . Add ( new KeyValuePair < Type , WeakReference > ( type , new WeakReference ( template ) ) ) ;
return template ;
}
}
return template ;
}
}
private static DataTemplate CreateDefaultTemplate ( Type type , TypeConverter converter )
{
Debug . Assert ( type ! = null ) ;
Debug . Assert ( converter ! = null ) ;
private static DataTemplate CreateDefaultTemplate ( Type type , TypeConverter converter )
{
Debug . Assert ( type ! = null ) ;
Debug . Assert ( converter ! = null ) ;
var template = new DataTemplate ( ) ;
var factory = new FrameworkElementFactory ( typeof ( TextBlock ) ) ;
var template = new DataTemplate ( ) ;
var factory = new FrameworkElementFactory ( typeof ( TextBlock ) ) ;
var binding = new Binding ( ) ;
binding . Mode = BindingMode . OneWay ;
binding . Converter = new DefaultConverter ( converter ) ;
binding . ConverterCulture = CultureInfo . CurrentCulture ;
var binding = new Binding ( ) ;
binding . Mode = BindingMode . OneWay ;
binding . Converter = new DefaultConverter ( converter ) ;
binding . ConverterCulture = CultureInfo . CurrentCulture ;
factory . SetBinding ( TextBlock . TextProperty , binding ) ;
factory . SetBinding ( TextBlock . TextProperty , binding ) ;
template . VisualTree = factory ;
template . Seal ( ) ;
template . VisualTree = factory ;
template . Seal ( ) ;
return template ;
}
return template ;
}
private static bool IsTypeOptimized ( Type type )
{
Debug . Assert ( type ! = null ) ;
private static bool IsTypeOptimized ( Type type )
{
Debug . Assert ( type ! = null ) ;
if ( typeof ( string ) . IsAssignableFrom ( type )
| | typeof ( UIElement ) . IsAssignableFrom ( type )
| | typeof ( XmlNode ) . IsAssignableFrom ( type ) )
return true ;
if ( typeof ( string ) . IsAssignableFrom ( type )
| | typeof ( UIElement ) . IsAssignableFrom ( type )
| | typeof ( XmlNode ) . IsAssignableFrom ( type ) )
return true ;
if ( ! typeof ( Inline ) . IsAssignableFrom ( type ) )
{
var converter = TypeDescriptor . GetConverter ( type ) ;
if ( ( converter ! = null ) & & ( converter . CanConvertTo ( typeof ( UIElement ) ) ) )
return true ;
}
if ( ! typeof ( Inline ) . IsAssignableFrom ( type ) )
{
var converter = TypeDescriptor . GetConverter ( type ) ;
if ( ( converter ! = null ) & & ( converter . CanConvertTo ( typeof ( UIElement ) ) ) )
return true ;
}
return false ;
}
return false ;
}
private static bool HasImplicitTemplate ( object item , Type type , DependencyObject container )
{
Debug . Assert ( type ! = null ) ;
private static bool HasImplicitTemplate ( object item , Type type , DependencyObject container )
{
Debug . Assert ( type ! = null ) ;
var finder = GenericContentTemplateSelector . FindTemplateResource ;
var finder = GenericContentTemplateSelector . FindTemplateResource ;
if ( finder = = null )
{
finder = GenericContentTemplateSelector . GetFindTemplateResourceInternal ( ) ;
if ( finder = = null )
{
finder = GenericContentTemplateSelector . GetFindTemplateResourceInternal ( ) ;
if ( finder = = null )
{
finder = GenericContentTemplateSelector . FindTemplateResourceFallback ;
}
if ( finder = = null )
{
finder = GenericContentTemplateSelector . FindTemplateResourceFallback ;
}
GenericContentTemplateSelector . FindTemplateResource = finder ;
}
GenericContentTemplateSelector . FindTemplateResource = finder ;
}
Debug . Assert ( finder ! = null ) ;
Debug . Assert ( finder ! = null ) ;
return ( finder . Invoke ( container , item , type ) ! = null ) ;
}
return ( finder . Invoke ( container , item , type ) ! = null ) ;
}
private static Func < DependencyObject , object , Type , object > GetFindTemplateResourceInternal ( )
{
try
{
var methodInfo = typeof ( FrameworkElement ) . GetMethod (
"FindTemplateResourceInternal" ,
BindingFlags . Public | BindingFlags . NonPublic | BindingFlags . Static ,
null ,
CallingConventions . Any ,
new Type [ ] { typeof ( DependencyObject ) , typeof ( object ) , typeof ( Type ) } ,
null ) ;
if ( methodInfo ! = null )
private static Func < DependencyObject , object , Type , object > GetFindTemplateResourceInternal ( )
{
var finder = ( Func < DependencyObject , object , Type , object > ) Delegate . CreateDelegate ( typeof ( Func < DependencyObject , object , Type , object > ) , methodInfo ) ;
try
{
var methodInfo = typeof ( FrameworkElement ) . GetMethod (
"FindTemplateResourceInternal" ,
BindingFlags . Public | BindingFlags . NonPublic | BindingFlags . Static ,
null ,
CallingConventions . Any ,
new Type [ ] { typeof ( DependencyObject ) , typeof ( object ) , typeof ( Type ) } ,
null ) ;
if ( methodInfo ! = null )
{
var finder = ( Func < DependencyObject , object , Type , object > ) Delegate . CreateDelegate ( typeof ( Func < DependencyObject , object , Type , object > ) , methodInfo ) ;
return ( container , item , type ) = > finder . Invoke ( container , item , typeof ( DataTemplate ) ) ;
}
}
catch ( AmbiguousMatchException )
{
// We swallow the exception and use a fallback method instead.
}
catch ( MethodAccessException )
{
// We swallow the exception and use a fallback method instead.
}
return ( container , item , type ) = > finder . Invoke ( container , item , typeof ( DataTemplate ) ) ;
return null ;
}
}
catch ( AmbiguousMatchException )
{
// We swallow the exception and use a fallback method instead.
}
catch ( MethodAccessException )
{
// We swallow the exception and use a fallback method instead.
}
return null ;
}
private static object FindTemplateResourceFallback ( DependencyObject container , object item , Type type )
{
var fe = container as FrameworkElement ;
if ( fe = = null )
return null ;
private static object FindTemplateResourceFallback ( DependencyObject container , object item , Type type )
{
var fe = container as FrameworkElement ;
if ( fe = = null )
return null ;
return fe . TryFindResource ( new DataTemplateKey ( type ) ) ;
}
return fe . TryFindResource ( new DataTemplateKey ( type ) ) ;
}
#region DefaultConverter Private Class
#region DefaultConverter Private Class
private sealed class DefaultConverter : IValueConverter
{
internal DefaultConverter ( TypeConverter converter )
{
if ( converter = = null )
throw new ArgumentNullException ( "converter" ) ;
private sealed class DefaultConverter : IValueConverter
{
internal DefaultConverter ( TypeConverter converter )
{
if ( converter = = null )
throw new ArgumentNullException ( "converter" ) ;
m_converter = converter ;
}
m_converter = converter ;
}
public object Convert ( object value , Type targetType , object parameter , CultureInfo culture )
{
object result ;
public object Convert ( object value , Type targetType , object parameter , CultureInfo culture )
{
object result ;
if ( DefaultConverter . TryConvertTo ( value , targetType , culture , m_converter , out result ) )
return result ;
if ( DefaultConverter . TryConvertTo ( value , targetType , culture , m_converter , out result ) )
return result ;
if ( value ! = null )
{
var valueType = value . GetType ( ) ;
if ( value ! = null )
{
var valueType = value . GetType ( ) ;
if ( DefaultConverter . TryConvertTo ( value , targetType , culture , TypeDescriptor . GetConverter ( valueType ) , out result ) )
return result ;
if ( DefaultConverter . TryConvertTo ( value , targetType , culture , TypeDescriptor . GetConverter ( valueType ) , out result ) )
return result ;
if ( targetType . IsAssignableFrom ( valueType ) )
return value ;
}
else if ( DefaultConverter . IsNullableType ( targetType ) )
{
return value ;
}
if ( targetType . IsAssignableFrom ( valueType ) )
return value ;
}
else if ( DefaultConverter . IsNullableType ( targetType ) )
{
return value ;
}
throw new ArgumentException ( "Cannot convert to type " + targetType . FullName + "." , "value" ) ;
}
public object ConvertBack ( object value , Type targetType , object parameter , CultureInfo culture )
{
throw new NotSupportedException ( ) ;
}
throw new ArgumentException ( "Cannot convert to type " + targetType . FullName + "." , "value" ) ;
}
private static bool TryConvertTo ( object value , Type targetType , CultureInfo culture , TypeConverter converter , out object result )
{
if ( converter ! = null )
{
try
{
result = converter . ConvertTo ( null , culture , value , targetType ) ;
return true ;
}
catch
{
// We'll try to convert the value another way.
}
if ( ( value ! = null ) & & ( converter . CanConvertFrom ( value . GetType ( ) ) ) )
{
try
public object ConvertBack ( object value , Type targetType , object parameter , CultureInfo culture )
{
var newValue = converter . ConvertFrom ( null , culture , value ) ;
result = converter . ConvertTo ( null , culture , newValue , targetType ) ;
return true ;
throw new NotSupportedException ( ) ;
}
catch
private static bool TryConvertTo ( object value , Type targetType , CultureInfo culture , TypeConverter converter , out object result )
{
if ( converter ! = null )
{
try
{
result = converter . ConvertTo ( null , culture , value , targetType ) ;
return true ;
}
catch
{
// We'll try to convert the value another way.
}
if ( ( value ! = null ) & & ( converter . CanConvertFrom ( value . GetType ( ) ) ) )
{
try
{
var newValue = converter . ConvertFrom ( null , culture , value ) ;
result = converter . ConvertTo ( null , culture , newValue , targetType ) ;
return true ;
}
catch
{
}
}
}
result = null ;
return false ;
}
}
}
result = null ;
return false ;
}
private static bool IsNullableType ( Type type )
{
return ( ! type . IsValueType )
| | ( type . IsGenericType & & ( type . GetGenericTypeDefinition ( ) = = typeof ( Nullable < > ) ) ) ;
}
private static bool IsNullableType ( Type type )
{
return ( ! type . IsValueType )
| | ( type . IsGenericType & & ( type . GetGenericTypeDefinition ( ) = = typeof ( Nullable < > ) ) ) ;
}
private readonly TypeConverter m_converter ;
}
private readonly TypeConverter m_converter ;
#endregion
}
#endregion
}
}
Pat Limosnero
2 years ago