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);
}
}));
}
/// <summary>
/// Open desired FolderElement and retrieves its content.
/// Functionality for the M-Files FolderContentItem types: traditonal folder and external folder has not been implemented.
/// </summary>
/// <param name="elm">The FolderElement clicked in the user interface and passed to this function. If the FolderElement passed does not contain a valid lookup id,
/// the ElementName property is used for resolving the next level.</param>
/// <returns>List of FolderElements that represent the contents of the clicked FolderElement.</returns>
/// <throws>Exception if a FolderContentItem is of either traditional or external type</throws>
public List <FolderElement> GetNextFolder(FolderElement elm)
{
// Sanity!!
if (null == elm)
{
throw new ArgumentNullException();
}
FolderDef fDef = new FolderDef();
TypedValue tv = new TypedValue();
if (elm.ElementType == ElementType.ViewFolder)
{
if (0 != elm.ElementId)
{
fDef.SetView(elm.ElementId);
}
else
{
throw new Exception(String.Format("A folderelement of type {0} was passed, containing an invalid elementId for the ViewFolder.", elm.ElementType.ToString()));
}
}
if (elm.ElementType == ElementType.PropertyFolderVL)
{
if (0 != elm.ElementId)
{
tv.SetValue(MFDataType.MFDatatypeLookup, elm.ElementId);
fDef.SetPropertyFolder(tv);
}
else
{
throw new Exception(String.Format("A folderelement of type {0} was passed, containing an invalid elementId for the PropertyFolder.", elm.ElementType.ToString()));
}
}
if (elm.ElementType == ElementType.PropertyFolderText)
{
if (elm.ElementName != "")
{
tv.SetValue(MFDataType.MFDatatypeText, elm.ElementName);
fDef.SetPropertyFolder(tv);
}
else
{
throw new Exception(String.Format("A folderelement of type {0} was passed, containing an empty ElementName property.", elm.ElementType.ToString()));
}
}
if (elm.ElementType == ElementType.PropertyFolderInt)
{
if (elm.ElementName != "" && int.TryParse(elm.ElementName, out int res))
{
tv.SetValue(MFDataType.MFDatatypeInteger, res);
fDef.SetPropertyFolder(tv);
}
else
{
throw new Exception(String.Format("A folderelement of type {0} was passed. Unable to parse the ElementName property: {1}, it is either not a number or an empty string.", elm.ElementType.ToString(), elm.ElementName));
}
}
if (elm.ElementType == ElementType.PropertyFolderDbl)
{
if (elm.ElementName != "" && decimal.TryParse(elm.ElementName, out decimal res))
{
tv.SetValue(MFDataType.MFDatatypeFloating, res);
fDef.SetPropertyFolder(tv);
}
else
{
throw new Exception(String.Format("A folderelement of type {0} was passed. Unable to parse the ElementName property: {1}, it is either not a decimal or an empty string.", elm.ElementType.ToString(), elm.ElementName));
}
}
currentFolderDefs.Add(-1, fDef);
return(GetElements(currentFolderDefs, elm));
}