/// <summary>
/// Called when the user selects a taxon in the tree
/// The tree model in Session is updated with which nodes is expanded
/// and which node is selected.
/// Then the user is redirected to the requested page
/// </summary>
/// <param name="navigateId"></param>
/// <param name="expandedNodes"></param>
/// <returns></returns>
public ActionResult TaxonTreeNavigate(int navigateId, string expandedNodes)
{
// navigateId is a unique sequential number and is not the TaxonId.
// you get the TaxonId by model.GetTreeViewItem(navigateTaxonId).TaxonId.
var model = Session["TaxonTree"] as TaxonTreeViewModel;
int taxonId = 0;
if (model != null && !string.IsNullOrEmpty(expandedNodes))
{
TaxonTreeViewItem treeItem = model.GetTreeViewItemById(navigateId);
if (treeItem == null) // happens when the user navigates backwards and the tree is different from the one in session
{
RedrawTree(taxonId);
}
else
{
taxonId = treeItem.TaxonId;
var javascriptSerializer = new JavaScriptSerializer();
int[] expandedNodesList = javascriptSerializer.Deserialize <int[]>(expandedNodes);
model.ActiveId = navigateId;
model.ExpandedTaxa = expandedNodesList.ToList();
model.BuildParentTaxaList(treeItem);
}
}
return(RedirectToAction(this.NavigateData.Action, this.NavigateData.Controller, new { @taxonId = taxonId }));
}
/// <summary>
/// Trigger a refresh of the tree next time it is rendered.
/// Tries to remember which taxa is expanded and which taxon is selected
/// </summary>
/// <param name="newRootTaxonId">root taxon in tree</param>
/// <param name="selectedTaxonId">selected taxon</param>
protected void RedrawTree(int newRootTaxonId, int selectedTaxonId)
{
var model = Session["TaxonTree"] as TaxonTreeViewModel;
Session.Remove("TaxonTree");
if (model != null && this.RootTaxonId.GetValueOrDefault() == newRootTaxonId)
{
TempData.Add("expandedTaxaInTree", model.ExpandedTaxa);
}
this.RootTaxonId = newRootTaxonId;
if (model != null)
{
TaxonTreeViewItem treeViewItem = model.GetTreeViewItemByTaxonId(selectedTaxonId);
if (treeViewItem != null)
{
TempData.Add("selectedIdInTree", treeViewItem.Id);
}
else
{
// this is the case when we have created a new taxon
TempData.Add("selectedTaxonIdInTree", selectedTaxonId);
}
//TempData.Add("selectedIdInTree", selectedTaxonId);
}
}
/// <summary>
/// Called from Dynatree as an ajax call.
/// Returns the closest children to the taxonId as Json
/// </summary>
/// <param name="taxonId"></param>
/// <returns></returns>
public JsonNetResult GetTreeData(int taxonId)
{
var model = Session["TaxonTree"] as TaxonTreeViewModel;
TaxonTreeViewItem item = model.GetTreeViewItemById(taxonId);
if (item == null) // happens when the user navigates backwards and the tree is different from the one in session
{
ITaxon taxon = CoreData.TaxonManager.GetTaxon(GetCurrentUser(), taxonId);
item = new TaxonTreeViewItem(taxon, null, 1, model.GetUniqueNumber(), true);
//var str2 = Url.Content(@"~/Images/Icons/minus-small.png");
//var url = new UrlHelper(this.Request.RequestContext);
//var str = url.Content(@"~/Images/Icons/minus-small.png");
}
item.Children = model.LoadChildren(item, false);
return(new JsonNetResult(item.Children));
}
