protected override void CreateChildControls()
{
this.Controls.Clear();
// Build the header.
if (this._header != null)
{
// We're just going to render it directly into the panel, since we
// don't want to "mess up" and formating the user might try and
// do here.
this._header.InstantiateIn(this);
}
// Build the items.
for (int i = 0; i < this.ItemCount; i++)
{
if (i > 0 && this._separator != null)
{
this._separator.InstantiateIn(this);
}
PlusOneControlItem item = new PlusOneControlItem(this, this.AutoRemoveControl, null, this._items.Count);
if (this._template != null)
{
this._template.InstantiateIn(item);
}
item.AutoRemoveButtonClicked += new CommandEventHandler(this.item_OnAutoRemoveButtonClicked);
this._items.Add(item);
this.Controls.Add(item);
this.OnItemCreated(new PlusOneItemEventArgs(item));
}
// Create an "extra" hidden control item.
PlusOneControlItem itemHdn = new PlusOneControlItem(this, this.AutoRemoveControl, null, this._items.Count);
itemHdn.Visible = false;
if (this._template != null)
{
this._template.InstantiateIn(itemHdn);
}
this.Controls.Add(itemHdn);
// Build the footer.
if (this._footer != null)
{
// Same as the header, just render it exactly as specified.
this._footer.InstantiateIn(this);
}
base.CreateChildControls();
}
public void RemoveItem(PlusOneControlItem item)
{
int idx = this.Controls.IndexOf(item);
if (idx == -1)
{
throw new ArgumentOutOfRangeException("item", "Specified item was not found in the control.");
}
else
{
this.RemoveItemAt(idx);
}
}
public void RemoveItemAt(int idx)
{
if (idx < 0 || idx > this._items.Count)
{
throw new ArgumentOutOfRangeException("idx");
}
PlusOneControlItem item = this._items[idx];
this.Controls.Remove(item);
this._items.RemoveAt(idx);
this.ItemCount--;
this.OnItemRemoved(new PlusOneItemEventArgs(item));
}
//***************************************************************************
// Public Methods
//
public void CreateNew()
{
this.ItemCount++;
for (int i = 0; i < this.Controls.Count; i++)
{
PlusOneControlItem ctrl = (this.Controls[i] as PlusOneControlItem);
if (ctrl == null)
{
continue;
}
// This works off the premise that we'll never have more than one
// PlusOneControlItem set to Visible=false.
if (ctrl.Visible == false)
{
ctrl.Visible = true;
if (this._separator != null)
{
// We don't want to create the seperator until we're actually
// ready to show the "exta" item. This *does* mean that
// controls within the separator template cannot participate
// in the view state.
Panel panSep = new Panel();
this._separator.InstantiateIn(panSep);
for (int t = 0; t < panSep.Controls.Count; t++)
{
this.Controls.AddAt(i + t, panSep.Controls[t]);
}
}
this._items.Add(ctrl);
this.OnItemAdded(new PlusOneItemEventArgs(ctrl));
break;
}
}
}
//***************************************************************************
// Class Constructors
//
public PlusOneItemEventArgs(PlusOneControlItem item)
{
this.Item = item;
}