public static bool SetFocusToPrevious <T>(Block current)
where T : Block
{
while (current != null)
{
current = current.FindPrevFocusableBlock();
if (current != null && current is T)
{
current.SetFocus(true);
return(true);
}
}
return(false);
}
//public static void SetFocusToTheBeginningOfToken(Block token)
//{
// if (token == null)
// {
// return;
// }
// token.SetCursorToTheBeginning();
// token.SetFocus(true);
//}
//public static void SetFocusToTheEndOfToken(Block token)
//{
// if (token == null)
// {
// return;
// }
// token.SetCursorToTheEnd();
// token.SetFocus(true);
//}
public static void SetCursorToTheEndOfPreviousToken(Block block)
{
Block prev = block.FindPrevFocusableBlock();
if (prev != null)
{
prev.SetCursorToTheEnd(true);
}
//else
//{
// ContainerBlock parent = block.Parent;
// if (parent != null)
// {
// Block prevParent = parent.Prev;
// if (prevParent != null)
// {
// prevParent.SetCursorToTheEnd();
// Block toFocus = prevParent.FindLastFocusableBlock();
// }
// }
//}
}
/// <summary>
/// One of the children of this LinearContainerBlock has received a key click.
/// </summary>
/// <param name="Block">Which child has been clicked?</param>
/// <param name="e">Key event info</param>
protected virtual void Children_KeyDown(Block block, System.Windows.Forms.KeyEventArgs e)
{
Block nextFocusable = null;
bool isLeft = e.KeyCode == System.Windows.Forms.Keys.Left;
bool isUp = e.KeyCode == System.Windows.Forms.Keys.Up;
bool isDown = e.KeyCode == System.Windows.Forms.Keys.Down;
bool isRight = e.KeyCode == System.Windows.Forms.Keys.Right;
bool isPrev = e.KeyCode == PrevKey;
bool isNext = e.KeyCode == NextKey;
bool prevIsUp = PrevKey == System.Windows.Forms.Keys.Up;
bool nextIsDown = NextKey == System.Windows.Forms.Keys.Down;
if (isPrev || (isLeft && prevIsUp))
{
nextFocusable = block.FindPrevFocusableBlock();
if (nextFocusable != null)
{
if (isLeft)
{
nextFocusable.SetCursorToTheEnd();
}
else
{
nextFocusable.SetFocus();
}
e.Handled = true;
}
else
{
if (this.CanGetFocus)
{
this.SetFocus();
e.Handled = true;
}
}
}
else if (isNext || (isRight && nextIsDown))
{
nextFocusable = block.FindNextFocusableBlock();
if (nextFocusable != null)
{
if (isRight)
{
nextFocusable.SetCursorToTheBeginning();
}
else
{
nextFocusable.SetFocus();
}
e.Handled = true;
}
}
else if (e.KeyCode == System.Windows.Forms.Keys.Home)
{
if (this.CanGetFocus)
{
this.SetFocus();
e.Handled = true;
}
}
if (!e.Handled)
{
this.RaiseKeyDown(e);
}
}