private void ExpandTreeViewItem(TreeViewItem parent, FolderDefs folderDefs = null)
{
// Sanity.
if (null == parent)
{
return;
}
folderDefs = folderDefs ?? new FolderDefs();
// Remove anything including the "loading" item.
parent.Items.Clear();
this.Dispatcher.BeginInvoke(new Action(() =>
{
// Get everything in the passed location.
foreach (var item in vault.ViewOperations.GetFolderContents(folderDefs).Cast <FolderContentItem>())
{
// Get the folder defs to use for this node.
var tag = folderDefs.Clone();
var folderDef = new FolderDef();
// Create the tree view item depending on the type of item we've got.
var treeViewItem = new TreeViewItem();
switch (item.FolderContentItemType)
{
// Render views.
case MFFolderContentItemType.MFFolderContentItemTypeViewFolder:
{
// Set up the folder def to go "into" this view.
folderDef.SetView(item.View.ID);
// Set the header to the view name.
treeViewItem.Header = item.View.Name;
}
break;
// Render property groups.
case MFFolderContentItemType.MFFolderContentItemTypePropertyFolder:
{
// Set up the folder def to go "into" this grouping.
folderDef.SetPropertyFolder(item.PropertyFolder);
// Set the header to the grouping name.
treeViewItem.Header = item.PropertyFolder.DisplayValue;
}
break;
default:
// We should also handle other types of content, but this will do for now.
continue;
}
if (null == treeViewItem.Header)
{
continue;
}
// Set up the tag.
tag.Add(tag.Count + 1, folderDef);
treeViewItem.Tag = tag;
// Add the item to the list.
treeViewItem.Items.Add(new TreeViewItem()
{
Header = "Loading...", IsEnabled = false
});
treeViewItem.Expanded += TreeViewItem_Expanded;
parent.Items.Add(treeViewItem);
}
}));
}
// Helper method to get FolderContentItems from the vault and convert them to FolderElements
private List <FolderElement> GetElements(FolderDefs folderDefs, FolderElement elm = null)
{
currentFolderContent = new List <FolderElement>();
// get the collection of FolderContentItems
var content = vault.ViewOperations.GetFolderContents(folderDefs);
if (content.Count == 0)
{
// the selscted FolderElement is an empty folder. Can be prevented by setting filter on View to only show documents.
FolderElement e = new FolderElement()
{
ElementId = 0, ElementName = "Nothing to see here!", ElementType = ElementType.PropertyFolderVL
};
currentFolderContent.Add(e);
ListCurrentFolderElements(currentFolderContent); // for testing!!
return(currentFolderContent);
//Optionally we throw an exception
throw new EmptyFolderException(folderDefs.Count, elm.ElementName);
}
foreach (var item in content)
{
FolderElement e = new FolderElement();
if ((item as FolderContentItem).FolderContentItemType == MFFolderContentItemType.MFFolderContentItemTypePropertyFolder)
{
//convert to FolderElement with appropriate data and add to list of folderelement
TypedValue tv = (item as FolderContentItem).PropertyFolder;
e.ElementName = tv.DisplayValue;
if (tv.DataType == MFDataType.MFDatatypeLookup)
{
e.ElementId = tv.GetLookupID();
e.ElementType = ElementType.PropertyFolderVL;
}
else
{
e.ElementId = 0;
}
if (tv.DataType == MFDataType.MFDatatypeText)
{
e.ElementType = ElementType.PropertyFolderText;
}
if (tv.DataType == MFDataType.MFDatatypeInteger)
{
e.ElementType = ElementType.PropertyFolderInt;
}
if (tv.DataType == MFDataType.MFDatatypeFloating)
{
e.ElementType = ElementType.PropertyFolderDbl;
}
currentFolderContent.Add(e);
continue;
}
if ((item as FolderContentItem).FolderContentItemType == MFFolderContentItemType.MFFolderContentItemTypeViewFolder)
{
//convert to FolderElement with appropriate data and add to list of folderelement
View v = (item as FolderContentItem).View;
e.ElementName = v.Name;
e.ElementId = v.ID;
e.ElementType = ElementType.ViewFolder;
currentFolderContent.Add(e);
continue;
}
if ((item as FolderContentItem).FolderContentItemType == MFFolderContentItemType.MFFolderContentItemTypeObjectVersion)
{
//convert to FolderElement with appropriate data and add to list of folderelement
ObjectVersion obj = (item as FolderContentItem).ObjectVersion;
// we will not display objects that are not documents. Depending on customers use, we may need implement functionality that works for document collections
if (obj.ObjVer.Type != (int)MFBuiltInObjectType.MFBuiltInObjectTypeDocument || obj.FilesCount == 0)
{
continue;
}
e.ElementName = obj.Title;
e.ElementId = obj.ObjVer.ID;
if (obj.FilesCount != 1 && obj.FilesCount > 0)
{
e.ElementType = ElementType.MultiFile;
}
else
{
e.ElementType = ElementType.Document;
}
currentFolderContent.Add(e);
continue;
}
else
{
throw new NotImplementedException(String.Format("Unable to process FolderContentItem of type: {0}", (item as FolderContentItem).FolderContentItemType.ToString()));
}
//convert to FolderElement with appropriate data and add to list of folderelement
}
if (!(currentFolderContent.Count > 0))
{
//the selected folder contains only empty multi-file documents
FolderElement e = new FolderElement()
{
ElementId = 0, ElementName = "Nothing to see here!", ElementType = ElementType.PropertyFolderVL
};
currentFolderContent.Add(e);
ListCurrentFolderElements(currentFolderContent); // for testing!!
return(currentFolderContent);
//Optionally we throw an exception
throw new EmptyFolderException(folderDefs.Count, elm.ElementName);
}
ListCurrentFolderElements(currentFolderContent); // for testing!!
// Set the global boolean canNavigateBackwards to true
canNavigateBackwards = true;
//return list of FolderElements
return(currentFolderContent);
}