protected override object CreateInstance(Type itemType)
{
ListViewGroupEx group = (ListViewGroupEx)base.CreateInstance(itemType);
group.Name = this.CreateListViewGroupName((ListViewGroupCollectionEx)this.editValue);
return(group);
}
internal void UpdateGroupNative(ListViewGroupEx group, bool invalidate = true)
{
using (NativeMethods.LVGROUP nGroup = new NativeMethods.LVGROUP(group))
{
nGroup.SetState(NativeMethods.ListViewGroupState.Collapsible, collapsible);
SendMessage(NativeMethods.ListViewMessage.SetGroupInfo, group.ID, nGroup);
}
if (invalidate)
{
base.Invalidate();
}
}
public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)
{
if (destinationType == null)
{
throw new ArgumentNullException("destinationType");
}
if ((destinationType == typeof(InstanceDescriptor)) && (value is ListViewGroupEx))
{
ListViewGroupEx group = (ListViewGroupEx)value;
ConstructorInfo constructor = typeof(ListViewGroupEx).GetConstructor(System.Type.EmptyTypes);
if (constructor != null)
{
return(new InstanceDescriptor(constructor, null, false));
}
}
if ((destinationType == typeof(string)) && (value == null))
{
return("None");
}
return(base.ConvertTo(context, culture, value, destinationType));
}
internal void SetGroupState(ListViewGroupEx group, NativeMethods.ListViewGroupState item, bool value)
{
NativeMethods.LVGROUP mgroup = new NativeMethods.LVGROUP(NativeMethods.ListViewGroupMask.State);
mgroup.SetState(item, value);
SendMessage(NativeMethods.ListViewMessage.SetGroupInfo, GetGroupId(group), mgroup);
}
