/// <summary>
/// This method iterates recursively through the tree to return only the trials
/// contained in the tree.
/// </summary>
/// <param name="trials">Ref. The output <see cref="TrialCollection"/> of trials.</param>
/// <param name="node">The <see cref="TreeNode"/> to parse.</param>
private void ParseNodeForTrials(ref TrialCollection trials, TreeNode node)
{
Trial trial = null;
// Add trial if this node is marked to be a trial
if (node.Tag != null && node.Tag.ToString() == "Trial")
{
trial = new Trial(node.Text, GetIdOfNode(node));
trials.Add(trial);
}
foreach (TreeNode subNode in node.Nodes)
{
SlideshowTreeNode subSlideNode = subNode as SlideshowTreeNode;
Slide slide = subSlideNode.Slide;
if (slide != null)
{
// By default use a new trial for each slide
trial = new Trial(subNode.Text, GetIdOfNode(subNode));
// If parent is already marked as trial use this
// instead.
if (subNode.Parent != null && subNode.Parent.Tag != null && subNode.Parent.Tag.ToString() == "Trial")
{
trial = trials[trials.Count - 1];
}
// Add slide to correct trial
trial.Add(slide);
}
// Iterate through the tree.
this.ParseNodeForTrials(ref trials, subNode);
// If a trial was found, add it to the list.
if (trial != null && !trials.Contains(trial))
{
trials.Add(trial);
}
}
}
/// <summary>
/// Inserts the pre slide trials.
/// </summary>
/// <param name="trials">The trials.</param>
private void InsertPreSlideTrials(ref TrialCollection trials)
{
var trialsWithPreSlideTrials = new TrialCollection();
foreach (var trial in trials)
{
foreach (var slideobject in trial)
{
// if we have a preslide fixation trial add this trial before
var preSlideTrialID = slideobject.IdOfPreSlideFixationTrial;
if (preSlideTrialID != -1)
{
var preSlideNode = this.GetNodeByID(preSlideTrialID);
var preTrial = new Trial(preSlideNode.Text, preSlideTrialID);
preTrial.AddRange(this.GetPreSlideTrialSlides(preSlideNode));
trialsWithPreSlideTrials.Add(preTrial);
}
}
trialsWithPreSlideTrials.Add(trial);
}
trials = trialsWithPreSlideTrials;
}
/// <summary>
/// This method iterates the given shuffled object collection recursively
/// to return the one dimensional <see cref="TrialCollection"/> that is used
/// during presentation.
/// </summary>
/// <param name="collection">A <see cref="List{Object}"/> with the shuffled trials separated in
/// shuffle groups.</param>
/// <param name="trials">Ref. The output <see cref="TrialCollection"/>.</param>
private void GetTrialsFromObjectCollection(List <object> collection, ref TrialCollection trials)
{
foreach (object item in collection)
{
if (item is Trial)
{
Trial trial = item as Trial;
trials.Add(trial);
}
else if (item is List <object> )
{
this.GetTrialsFromObjectCollection((List <object>)item, ref trials);
}
}
}
