/// <summary>
/// Activates the targetted PageView within a MultiPage control.
/// </summary>
private void SetTargetSelectedIndex()
{
int arrayIndex = Items.ToArrayIndex(SelectedIndex);
if (arrayIndex >= 0)
{
Tab tab = (Tab)Items[arrayIndex];
MultiPage multiPage = Target;
if (multiPage != null)
{
PageView page = (tab == null) ? null : tab.Target;
if ((page != null) && !page.Selected)
{
if (_OldMultiPageIndex < 0)
{
_OldMultiPageIndex = multiPage.SelectedIndex;
}
// Activate the PageView
page.Activate();
}
}
}
}
/// <summary>
/// Sets this page to be the selected page.
/// </summary>
public virtual void Activate()
{
MultiPage multiPage = ParentMultiPage;
if (multiPage != null)
{
multiPage.SelectedIndex = Index;
}
}
/// <summary>
/// Clears the collection.
/// </summary>
public override void Clear()
{
if (Count > 0)
{
// This is to prepare for new items later.
// When a new item is added later, we want the SelectedIndex to reset to 0.
MultiPage mpParent = (MultiPage)Owner;
mpParent.SelectedIndex = 0;
}
base.Clear();
}
/// <summary>
/// After removing an index, adjust the selected index.
/// </summary>
/// <param name="index">The index of the element that was removed.</param>
private void RemovedIndex(int index)
{
MultiPage mpParent = (MultiPage)Owner;
int curIndex = mpParent.SelectedIndex;
if ((index >= 0) && (index < curIndex))
{
mpParent.SelectedIndex = curIndex - 1;
}
else if ((index == curIndex) && (curIndex > 0) && (Count <= curIndex))
{
mpParent.SelectedIndex = Count - 1;
}
}
/// <summary>
/// Adds a control to the collection at a specific index.
/// </summary>
/// <param name="index">The index where the control should be added.</param>
/// <param name="child">The child control.</param>
public override void AddAt(int index, Control child)
{
VerifyChild(child);
base.AddAt(index, child);
MultiPage mpParent = (MultiPage)Owner;
int curIndex = mpParent.SelectedIndex;
if (index <= curIndex)
{
curIndex++;
if (curIndex < Count)
{
mpParent.SelectedIndex = curIndex;
}
}
}
/// <summary>
/// Signals the server control object to notify the ASP.NET application that the state of the control has changed.
/// </summary>
protected override void RaisePostDataChangedEvent()
{
OnSelectedIndexChange(new EventArgs());
MultiPage target = Target;
if (target != null)
{
if (_OldMultiPageIndex < 0)
{
SetTargetSelectedIndex();
}
if ((_OldMultiPageIndex >= 0) && (target.SelectedIndex != _OldMultiPageIndex))
{
target.FireSelectedIndexChangeEvent();
}
}
}
/// <summary>
/// Initializes a new instance of a PageViewCollection.
/// </summary>
/// <param name="owner">The parent MultiPage control.</param>
public PageViewCollection(MultiPage owner) : base(owner)
{
}
