public void Drop(IResource targetResource, IDataObject data, DragDropEffects allowedEffect, int keyState)
{
if (data.GetDataPresent(typeof(IResourceList)))
{
// The resources we're dragging
IResourceList dragResources = (IResourceList)data.GetData(typeof(IResourceList));
// Currently, only the Deleted Resources view has a drop handler
if (FilterRegistry.IsDeletedResourcesView(targetResource))
{
// Delete the resources dropped onto the deleted items view
foreach (IResource res in dragResources)
{
IResourceDeleter deleter = Core.PluginLoader.GetResourceDeleter(res.Type);
if (deleter != null)
{
try
{
Core.ResourceAP.RunJob(new ResourceDelegate(deleter.DeleteResource), res);
// deleter.DeleteResource( res );
}
catch (NotImplementedException)
{
}
}
}
}
else
{
return;
}
}
}
public DragDropEffects DragOver(IResource targetResource, IDataObject data, DragDropEffects allowedEffect, int keyState)
{
if (data.GetDataPresent(typeof(IResourceList)))
{
// The resources we're dragging
IResourceList dragResources = (IResourceList)data.GetData(typeof(IResourceList));
// Currently, only the Deleted Resources view has a drop handler
if (!FilterRegistry.IsDeletedResourcesView(targetResource))
{
return(DragDropEffects.None);
}
// Collect all the direct and indirect parents of the droptarget; then we'll check to avoid dropping parent on its children
IntArrayList parentList = IntArrayListPool.Alloc();
try
{
IResource parent = targetResource;
while (parent != null)
{
parentList.Add(parent.Id);
parent = parent.GetLinkProp(Core.Props.Parent);
}
// Check
foreach (IResource res in dragResources)
{
// Dropping parent over its child?
if (parentList.IndexOf(res.Id) >= 0)
{
return(DragDropEffects.None);
}
// Cannot delete resource containers this way
if ((Core.ResourceStore.ResourceTypes[res.Type].Flags & ResourceTypeFlags.ResourceContainer) != 0)
{
return(DragDropEffects.None); // Cannot delete containers
}
}
return(DragDropEffects.Move);
}
finally
{
IntArrayListPool.Dispose(parentList);
}
}
else
{
return(DragDropEffects.None);
}
}