/// <summary>
/// Searches for a previous block "deep"
/// (includes children of previous blocks recursively)
/// </summary>
/// <returns>Focusable block if found; otherwise null</returns>
public Block FindPrevFocusableBlockInChain()
{
Block current = this.Prev;
while (current != null)
{
Block foundFocusableBlock = current.FindLastFocusableBlock();
if (foundFocusableBlock != null && foundFocusableBlock.CanGetFocus)
{
return(foundFocusableBlock);
}
current = current.Prev;
}
if (this.Parent != null)
{
if (this.Parent.CanGetFocus)
{
return(this.Parent);
}
else
{
return(this.Parent.FindPrevFocusableBlockInChain());
}
}
return(null);
}
/// <summary>
/// Searches a "brother" block upwards of startFrom,
/// that is above startFrom and is focusable.
/// If no such block is found, returns null.
/// </summary>
/// <param name="startFrom">Block, above which to search (upwards)</param>
/// <returns>Focusable sibling block, if found; otherwise null.</returns>
//public Block FindPrevFocusableSibling()
//{
// Block current = this.Prev;
// while (current != null && !current.CanGetFocus)
// {
// current = current.Prev;
// }
// return current;
//}
/// <summary>
/// Searches a "brother" block downwards of startFrom,
/// that is below startFrom and is focusable.
/// If no such block is found, returns null.
/// </summary>
/// <param name="startFrom">Block, down from which to search (downwards)</param>
/// <returns>Focusable sibling block, if found; otherwise null.</returns>
//public Block FindNextFocusableSibling()
//{
// Block current = this.Next;
// while (current != null && !current.CanGetFocus)
// {
// current = current.Next;
// }
// return current;
//}
/// <summary>
/// Searches for a previous block "deep"
/// (includes children of previous blocks recursively)
/// </summary>
/// <returns>Focusable block if found; otherwise null</returns>
public Block FindPrevFocusableBlock()
{
Block current = this.Prev;
while (current != null)
{
Block foundFocusableBlock = current.FindLastFocusableBlock();
if (foundFocusableBlock != null)
{
return(foundFocusableBlock);
}
current = current.Prev;
}
return(null);
}