public async Task EnsureExpanded(ILibraryItem libraryItem, ContainerTreeNode treeNode)
{
if (!treeNode.ContainerAcquired)
{
await GetExpansionItems(libraryItem, treeNode).ConfigureAwait(false);
}
}
private TreeNode CreateTreeNode(ILibraryItem containerItem, ILibraryContainer parentContainer)
{
var treeNode = new ContainerTreeNode(theme, parentContainer)
{
Text = containerItem.Name,
Tag = containerItem,
AlwaysExpandable = true
};
ApplicationController.Instance.Library.LoadItemThumbnail(
(icon) =>
{
treeNode.Image = icon.SetPreMultiply();
},
null,
containerItem,
null,
20,
20,
theme).ConfigureAwait(false);
treeNode.ExpandedChanged += (s, e) =>
{
this.EnsureExpanded(containerItem, treeNode).ConfigureAwait(false);
};
return(treeNode);
}
private async Task GetExpansionItems(ILibraryItem containerItem, ContainerTreeNode treeNode)
{
if (containerItem is ILibraryContainerLink containerLink)
{
// Prevent invalid assignment of container.Parent due to overlapping load attempts that
// would otherwise result in containers with self referencing parent properties
//if (loadingContainerLink != containerLink)
//{
// loadingContainerLink = containerLink;
try
{
// Container items
var container = await containerLink.GetContainer(null);
if (container != null)
{
await Task.Run(() =>
{
container.Load();
});
if (treeNode.NodeParent is ContainerTreeNode parentNode)
{
container.Parent = parentNode.Container;
}
foreach (var childContainer in container.ChildContainers)
{
treeNode.Nodes.Add(CreateTreeNode(childContainer));
}
treeNode.Container = container;
treeNode.AlwaysExpandable = treeNode.Nodes.Count > 0;
treeNode.Expandable = treeNode.Nodes.Count > 0;
treeNode.Expanded = treeNode.Nodes.Count > 0;
treeNode.Invalidate();
// container.Parent = ActiveContainer;
// SetActiveContainer(container);
}
}
catch { }
finally
{
// Clear the loading guard and any completed load attempt
// loadingContainerLink = null;
}
}
}
private async Task GetExpansionItems(ILibraryItem containerItem, ContainerTreeNode treeNode)
{
if (containerItem is ILibraryContainerLink containerLink)
{
try
{
// Container items
var container = await containerLink.GetContainer(null);
if (container != null)
{
await Task.Run(() =>
{
container.Load();
});
if (treeNode is ContainerTreeNode containerNode)
{
container.Parent = containerNode.ParentContainer;
}
foreach (var childContainer in container.ChildContainers)
{
treeNode.Nodes.Add(CreateTreeNode(childContainer, container));
}
treeNode.Container = container;
treeNode.AlwaysExpandable = treeNode.Nodes.Count > 0;
treeNode.Expandable = treeNode.Nodes.Count > 0;
treeNode.Expanded = treeNode.Nodes.Count > 0;
treeNode.Invalidate();
}
}
catch { }
}
}
