public virtual PropertyGridProperty CreateProperty()
{
return(ActivatorService.CreateInstance <PropertyGridProperty>(this));
}
public virtual DynamicObject CreateDynamicObject()
{
return(ActivatorService.CreateInstance <DynamicObject>());
}
public virtual IEnumerable BuildItems(PropertyGridProperty property, Type targetType, object parameter, CultureInfo culture)
{
if (property == null)
{
throw new ArgumentNullException("property");
}
Type enumType;
bool nullable;
bool isEnumOrNullableEnum = PropertyGridProperty.IsEnumOrNullableEnum(property.PropertyType, out enumType, out nullable);
PropertyGridItem zero = null;
var att = PropertyGridOptionsAttribute.FromProperty(property);
var items = new ObservableCollection <PropertyGridItem>();
if (isEnumOrNullableEnum)
{
if (nullable)
{
PropertyGridItem item = CreateItem();
item.Property = property;
item.Name = null; // "<unset>";
item.Value = null;
item.IsUnset = true;
items.Add(item);
}
string[] names = Enum.GetNames(enumType);
Array values = Enum.GetValues(enumType);
if (Extensions.IsFlagsEnum(enumType))
{
ulong uvalue = EnumToUInt64(property, property.Value);
for (int i = 0; i < names.Length; i++)
{
string name = names[i];
ulong nameValue = EnumToUInt64(property, values.GetValue(i));
string displayName;
if (!ShowEnumField(property, enumType, names[i], out displayName))
{
continue;
}
PropertyGridItem item = CreateItem();
item.Property = property;
item.Name = displayName;
item.Value = nameValue;
item.IsZero = nameValue == 0;
bool isChecked = true;
if (nameValue == 0)
{
zero = item;
}
// determine if this name is in fact a combination of other names
ulong bitsCount = (ulong)Extensions.GetEnumMaxPower(enumType) - 1; // skip first
ulong b = 1;
for (ulong bit = 1; bit < bitsCount; bit++) // signed, skip highest bit
{
string bitName = Enum.GetName(enumType, b);
if (bitName != null && name != bitName && (nameValue & b) != 0)
{
if ((uvalue & b) == 0)
{
isChecked = false;
}
}
b *= 2;
}
isChecked = (uvalue & nameValue) != 0;
item.IsChecked = isChecked;
items.Add(item);
}
// determine if the lisbox is empty, which we don't want anyway
if (items.Count == 0)
{
PropertyGridItem item = CreateItem();
item.Property = property;
item.Name = DefaultZeroName;
item.Value = 0;
item.IsZero = true;
items.Add(item);
}
if (uvalue == 0 && zero != null)
{
zero.IsChecked = true;
}
}
else
{
for (int i = 0; i < names.Length; i++)
{
string displayName;
if (!ShowEnumField(property, enumType, names[i], out displayName))
{
continue;
}
PropertyGridItem item = CreateItem();
item.Property = property;
item.Name = displayName;
item.Value = values.GetValue(i);
item.IsZero = i == 0; // first one is default
items.Add(item);
}
}
}
else
{
if (att != null && att.IsEnum)
{
bool manualFlags = false;
// either EnumList or EnumValues can be null but not both
// if not null, length must be the same
if (att.EnumNames == null || att.EnumNames.Length == 0)
{
if (att.EnumValues == null || att.EnumValues.Length == 0)
{
return(items);
}
att.EnumNames = new string[att.EnumValues.Length];
for (int i = 0; i < att.EnumValues.Length; i++)
{
att.EnumNames[i] = string.Format("{0}", att.EnumValues[i]);
}
}
else
{
if (att.EnumValues == null || att.EnumValues.Length != att.EnumNames.Length)
{
att.EnumValues = new object[att.EnumNames.Length];
if (att.IsFlagsEnum)
{
ulong current = 1; // don't use zero when nothing is specified in flags mode
manualFlags = true;
for (int i = 0; i < att.EnumNames.Length; i++)
{
att.EnumValues[i] = current;
current *= 2;
}
}
else
{
for (int i = 0; i < att.EnumNames.Length; i++)
{
att.EnumValues[i] = string.Format("{0}", att.EnumNames[i]);
}
}
}
}
// items value must of a compatible type with property.Value
Func <object, object> valueConverter = (v) =>
{
Type propType = property.Value != null?property.Value.GetType() : property.PropertyType;
if (v == null)
{
if (!propType.IsValueType)
{
return(null);
}
return(Activator.CreateInstance(propType));
}
Type vType = v.GetType();
if (propType.IsAssignableFrom(vType))
{
return(v);
}
return(ConversionService.ChangeType(v, propType));
};
if (att.IsFlagsEnum)
{
ulong uvalue = EnumToUInt64(property, property.Value);
for (int i = 0; i < att.EnumNames.Length; i++)
{
ulong nameValue = EnumToUInt64(property, att.EnumValues[i]);
PropertyGridItem item = CreateItem();
item.Property = property;
item.Name = att.EnumNames[i];
item.Value = valueConverter(att.EnumValues[i]);
if (manualFlags)
{
item.IsZero = i == 0;
}
else
{
item.IsZero = nameValue == 0;
}
bool isChecked = true;
if (nameValue == 0)
{
zero = item;
}
// note: in this case, we don't support names as a combination of other names
ulong bitsCount = (ulong)GetEnumMaxPower(att) - 1; // skip first
ulong b = 1;
for (ulong bit = 1; bit < bitsCount; bit++) // signed, skip highest bit
{
if ((uvalue & b) == 0)
{
isChecked = false;
}
b *= 2;
}
isChecked = (uvalue & nameValue) != 0;
item.IsChecked = isChecked;
items.Add(item);
}
// determine if the list is empty, which we don't want anyway
if (items.Count == 0)
{
PropertyGridItem item = CreateItem();
item.Property = property;
item.Name = DefaultZeroName;
item.Value = valueConverter(0);
item.IsZero = true;
items.Add(item);
}
if (uvalue == 0 && zero != null)
{
zero.IsChecked = true;
}
}
else
{
for (int i = 0; i < att.EnumNames.Length; i++)
{
PropertyGridItem item = CreateItem();
item.Property = property;
item.Name = att.EnumNames[i];
item.Value = valueConverter(att.EnumValues[i]);
item.IsZero = i == 0; // first one is default
items.Add(item);
}
}
}
}
var ctx = new Dictionary <string, object>();
ctx["items"] = items;
property.OnEvent(this, ActivatorService.CreateInstance <PropertyGridEventArgs>(property, ctx));
return(items);
}
public virtual PropertyGridItem CreateItem()
{
return(ActivatorService.CreateInstance <PropertyGridItem>());
}
public virtual PropertyGridEventArgs CreateEventArgs(PropertyGridProperty property)
{
return(ActivatorService.CreateInstance <PropertyGridEventArgs>(property));
}
public virtual PropertyGridDataProvider CreateDataProvider(object value)
{
return(ActivatorService.CreateInstance <PropertyGridDataProvider>(this, value));
}