protected void AddLegItems(TreeNode pTN, LegendItem li)
{
if (li.LegendItemVisible == false) return;
TreeNode tn = new TreeNode(li.LegendText);
//tn.SelectAction = TreeNodeSelectAction.None;
tn.PopulateOnDemand = false;
//tn.Value = li.LegendText;
//tn.NavigateUrl = "javascript:ManualSelect('" + "ciccio" + "')";
//tn.Text = "<span onclick='return false;'>" + li.LegendText + "</span>";
tn.Text = li.LegendText;
if (li.LegendSymbolMode == SymbolMode.Checkbox)
{
tn.ShowCheckBox = true;
tn.Checked = li.Checked;
}
if (li.LegendSymbolMode == SymbolMode.Symbol)
{
tn.ImageUrl = "ImageHandler.ashx?ID="+LegItemOnCache(ref li);
}
if (pTN == null)
{
Nodes.Add(tn);
}
else
{
pTN.ChildNodes.Add(tn);
}
if (li.LegendItems != null)
{
//foreach (LegendItem l in li.LegendItems)
for(int i = li.LegendItems.Count()-1;i>=0;i--)
{
LegendItem l = (LegendItem)li.LegendItems.ElementAt(i);
AddLegItems(tn, l);
}
}
}
/// <summary>
/// Handles updating event handlers during a copy process
/// </summary>
/// <param name="copy"></param>
protected override void OnCopy(Descriptor copy)
{
LegendItem myCopy = copy as LegendItem;
if (myCopy != null && myCopy.ItemChanged != null)
{
foreach (Delegate handler in myCopy.ItemChanged.GetInvocationList())
{
myCopy.ItemChanged -= (EventHandler)handler;
}
}
if (myCopy != null && myCopy.RemoveItem != null)
{
foreach (Delegate handler in myCopy.RemoveItem.GetInvocationList())
{
myCopy.RemoveItem -= (EventHandler)handler;
}
}
base.OnCopy(copy);
}
LegendItem GetLegendItem(string[] keys, LegendItem lip)
{
if (keys.Count() == 0) return null;
if (keys.Count() == 1 && lip.LegendText == keys[0]) return lip;
foreach (LegendItem li in lip.LegendItems)
{
if (li.LegendText == keys[0])
{
if (keys.Count() == 1)
return li;
else
{
string[] k = keysPop(keys);
return GetLegendItem(k, li);
}
}
}
return null;
}
private string LegItemOnCache(ref LegendItem li)
{
Size sz = li.GetLegendSymbolSize();
Bitmap b = new Bitmap(sz.Width+1, sz.Height+1);
Graphics g = Graphics.FromImage(b);
li.LegendSymbol_Painted(g,new Rectangle(0,0,sz.Width,sz.Height));
string name = Guid.NewGuid().ToString();
MemoryStream MS = new MemoryStream();
b.Save(MS, System.Drawing.Imaging.ImageFormat.Png);
byte[] buffer = MS.ToArray();
HttpContext.Current.Cache.Insert(name, buffer, null, Cache.NoAbsoluteExpiration, TimeSpan.FromMinutes(15));
g.Dispose();
b.Dispose();
return name;
}
