public CanvasViewModel()
{
Commands = new DynamicRelayCommandDictionary()
{
ParameterDicConverter = ParameterDicConverters.FromParameterDic(
new ParameterDic()
{
{ "CanvasVM", this }
})
};
Commands.UnselectAll = new SimpleScriptCommand("UnselectAll",
pd =>
{
pd.GetValue <CanvasViewModel>("{CanvasVM}").UnselectAll();
return(ResultCommand.NoError);
});
for (int i = 1; i < 20; i++)
{
Items.Add(new ItemViewModel("Test" + i));
}
Items[0].IsSelected = true;
}
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
}
