/// <summary>
/// Update the marquee bounds based on the given event data.
/// </summary>
/// <param name="e">A PInputEventArgs that contains the event data.</param>
protected virtual void UpdateMarquee(PInputEventArgs e)
{
RectangleF r = RectangleF.Empty;
if (marqueeParent is PCamera)
{
r = PUtil.AddPointToRect(r, canvasPressPt);
r = PUtil.AddPointToRect(r, e.CanvasPosition);
}
else
{
r = PUtil.AddPointToRect(r, presspt);
r = PUtil.AddPointToRect(r, e.Position);
}
r = marquee.GlobalToLocal(r);
marquee.Reset();
SetSafeMarqueePen(r.Width, r.Height);
marquee.AddRectangle(r.X, r.Y, r.Width, r.Height);
r = RectangleF.Empty;
r = PUtil.AddPointToRect(r, presspt);
r = PUtil.AddPointToRect(r, e.Position);
allItems.Clear();
PNodeFilter filter = CreateNodeFilter(r);
foreach (PNode parent in selectableParents)
{
PNodeList items;
if (parent is PCamera)
{
items = new PNodeList();
PCamera cameraParent = (PCamera)parent;
for (int i = 0; i < cameraParent.LayerCount; i++)
{
cameraParent.GetLayer(i).GetAllNodes(filter, items);
}
}
else
{
items = parent.GetAllNodes(filter, null);
}
foreach (PNode node in items)
{
allItems.Add(node, true);
}
}
}
/// <summary>
/// Gets a list containing the subset of this node and all of its descendent nodes
/// that are accepted by the given node filter.
/// </summary>
/// <param name="filter">The filter used to determine the subset.</param>
/// <param name="results">The list used to collect the subset; can be null.</param>
/// <returns>
/// A list containing the subset of this node and all its descendents accepted by
/// the filter.
/// </returns>
/// <remarks>
/// If the filter is null then all nodes will be accepted. If the results parameter is not
/// null then it will be used to store this subset instead of creating a new list.
/// </remarks>
public virtual PNodeList GetAllNodes(PNodeFilter filter, PNodeList results) {
if (results == null) {
results = new PNodeList();
}
if (filter == null || filter.Accept(this)) {
results.Add(this);
}
if (filter == null || filter.AcceptChildrenOf(this)) {
int count = ChildrenCount;
for (int i = 0; i < count; i++) {
children[i].GetAllNodes(filter, results);
}
}
return results;
}
