protected void RegisterColumn(Guid formatId, int propertyId, string title, uint defaultWidthInCharacters,
ListViewAlignment format = ListViewAlignment.Left, ShellColumnState state = ShellColumnState.TypeString)
{
var columnId = new ShellColumnId {
FormatId = formatId, PropertyId = propertyId
};
// Note: description field is not used by the shell.
var columnInfo = new ShellColumnInfo
{
ColumnId = columnId,
Title = title,
DefaultWidthInCharacters = defaultWidthInCharacters,
Format = format,
State = state | ShellColumnState.Extended | ShellColumnState.SecondaryUI,
variantType = 0
};
// Note: VT_LPSTR/VT_BSTR works ok. Other types seems to have issues with sorting.
// TODO = VT_BSTR
columnInfos.Add(columnInfo);
}
int IColumnProvider.GetItemData(ref ShellColumnId columnId, ref ShellColumnData columnData, object data)
{
Debug.WriteLine("[{0}] ColumnProviderBase.IColumnProvider.GetItemData, columnId.FormatId={1}, columnId.PropertyId={2}",
Id, columnId.FormatId, columnId.PropertyId);
if (!initialized)
{
throw new COMException("Initialize was not called");
}
if (!IsSupportedItem(ref columnData))
{
////VariantInit(pvarData); // must initialise out args as we return a success code.
return(HResults.False);
}
bool flushCache = columnData.Flags.HasFlag(ShellColumnDataOptions.UpdateItem);
var fileName = Path.GetFileName(columnData.File);
object info = null;
if (!flushCache)
{
// User of this interface (explorer.exe) are expected to ask
// all active item data per file.
info = FindInLastUsedCache(fileName);
}
if (info == null)
{
info = GetAndCacheFileInfo(fileName, columnData.File, flushCache);
}
////pvarData->bstrVal = (*pCachedInfo)[GetIndex(*pscid)].AllocSysString();
////pvarData->vt = VT_BSTR;
return(HResults.Ok);
}
protected void RegisterColumn(Guid formatId, int propertyId, string title, uint defaultWidthInCharacters,
ListViewAlignment format = ListViewAlignment.Left, ShellColumnState state = ShellColumnState.TypeString)
{
Contract.Requires(title != null);
Contract.Requires(title.Length < ShellColumnInfo.MaxTitleLength);
var columnId = new ShellColumnId {
FormatId = formatId, PropertyId = propertyId
};
// Note: description field is not used by the shell.
var columnInfo = new ShellColumnInfo();
columnInfo.ColumnId = columnId;
columnInfo.Title = title;
columnInfo.DefaultWidthInCharacters = defaultWidthInCharacters;
columnInfo.Format = format;
columnInfo.State = state | ShellColumnState.Extended | ShellColumnState.SecondaryUI;
// Note: VT_LPSTR/VT_BSTR works ok. Other types seems to have issues with sorting.
columnInfo.variantType = 0; // TODO = VT_BSTR
columnInfos.Add(columnInfo);
}
