public TestDroppableViewModel()
{
IProfile exProfile = new FileSystemInfoExProfile(null, null);
DropHelper = new LambdaShellDropHelper <IEntryModel>(
new LambdaValueConverter <IEntryViewModel, IEntryModel>(
(evm) => evm.EntryModel,
(em) => EntryViewModel.FromEntryModel(em)),
new LambdaValueConverter <IEnumerable <IEntryModel>, IDataObject>(
(ems) => exProfile.DragDrop.GetDataObject(ems),
(da) => exProfile.DragDrop.GetEntryModels(da)),
(ems, eff) =>
{
return(QueryDropEffects.CreateNew(DragDropEffectsEx.Copy));
},
(ems, da, eff) =>
{
if (ems.Count() > 1)
{
Label = ems.Count() + " items.";
}
else
{
Label = ems.First().FullPath;
}
return(DragDropEffectsEx.Copy);
})
{
DisplayName = "TestLabel"
};
}
public FileListViewModel(string label)
{
Items = new ObservableCollection <FileViewModel>();
#region Initialize DynamicCommandDictionary
Commands = new DynamicRelayCommandDictionary()
{
ParameterDicConverter = ParameterDicConverters.FromParameterDic(
new ParameterDic()
{
{ "FileListVM", this }
})
};
Commands.UnselectAll = _unselectCommand;
#endregion
#region Initialize DragHelper and DropHelper
DragHelper = new LambdaShellDragHelper <FileModel>(
_fileModelConverter, //Convert IDraggable (FileViewModel) to M (FileModel), ConvertBack is used.
_dataObjectConverter, //Convert IEnumerable<M> (IEnumerable<FileModel>) to IDataObject, Convert is used.
() => Items.Where(fvm => fvm.IsSelected).Select(fvm => fvm.Model),
(fmList) => DragDropEffectsEx.Link | DragDropEffectsEx.Copy | DragDropEffectsEx.Move, //QueryDrag
(fmList, da, effect) => //OnDragCompleted
{
if (effect == DragDropEffectsEx.Move)
{
foreach (var f in fmList)
{
var foundItem = Items.FirstOrDefault(fvm => fvm.Model.Equals(f));
if (foundItem != null)
{
Items.Remove(foundItem);
}
}
}
});
DropHelper = new LambdaShellDropHelper <FileModel>(
_fileModelConverter, //Convert IDraggable (FileViewModel) to M (FileModel), Convert is used.
_dataObjectConverter, //Convert IEnumerable<M> (IEnumerable<FileModel>) to IDataObject, ConvertBack is used.
(fms, eff) => //QueryDrop(IEnumerable<FileModel>, DragDropEffectsEx) : QueryDropEffects
{
IEnumerable <FileModel> itemsModel = Items.Select(fvm => fvm.Model);
if (fms.Any(f => itemsModel.Contains(f)))
{
return(QueryDropEffects.None);
}
return(QueryDropEffects.CreateNew(eff & (DragDropEffectsEx.Link | DragDropEffectsEx.Move), eff & DragDropEffectsEx.Move));
},
(fms, da, eff) => //Drop(IEnumerable<FileModel>, IDataObject, DragDropEffectsEx) : DragDropEffectsEx
{
foreach (var existingFvm in Items)
{
existingFvm.IsSelected = false;
}
foreach (var fm in fms)
{
Items.Add(new FileViewModel(fm));
}
if (eff.HasFlag(DragDropEffectsEx.Move))
{
return(DragDropEffectsEx.Move);
}
if (eff.HasFlag(DragDropEffectsEx.Copy))
{
return(DragDropEffectsEx.Copy);
}
return(DragDropEffectsEx.Link);
})
{
DisplayName = label
};
#endregion
}
