public RibbonTabHeaderItemsControlAutomationPeer(RibbonTabHeaderItemsControl owner)
: base(owner)
{
}
protected virtual void OnActivatingKeyTip(ActivatingKeyTipEventArgs e)
{
if (e.OriginalSource == this)
{
e.KeyTipHorizontalPlacement = KeyTipHorizontalPlacement.KeyTipCenterAtTargetCenter;
e.KeyTipVerticalPlacement = KeyTipVerticalPlacement.KeyTipCenterAtTargetCenter;
e.KeyTipHorizontalOffset = e.KeyTipVerticalOffset = 0;
Ribbon ribbon = Ribbon;
if (ribbon != null)
{
RibbonTabHeaderItemsControl tabHeaderItemsControl = ribbon.RibbonTabHeaderItemsControl;
if (tabHeaderItemsControl != null &&
tabHeaderItemsControl.IsVisible)
{
GeneralTransform headerToItemsControl = TransformToAncestor(tabHeaderItemsControl);
if (headerToItemsControl != null)
{
Point tabHeaderOrigin = headerToItemsControl.Transform(new Point());
double tabHeaderCenterX = tabHeaderOrigin.X + (ActualWidth / 2);
if (DoubleUtil.LessThan(tabHeaderCenterX, 0) ||
DoubleUtil.GreaterThan(tabHeaderCenterX, tabHeaderItemsControl.ActualWidth))
{
e.KeyTipVisibility = Visibility.Hidden;
}
else
{
GeneralTransform itemsControlToRibbon = tabHeaderItemsControl.TransformToAncestor(ribbon);
if (itemsControlToRibbon != null)
{
Point tabHeaderItemsControlOrigin = itemsControlToRibbon.Transform(new Point());
double horizontalOffset = tabHeaderCenterX + tabHeaderItemsControlOrigin.X;
if (DoubleUtil.LessThan(horizontalOffset, 0) ||
DoubleUtil.GreaterThan(horizontalOffset, ribbon.ActualWidth))
{
e.KeyTipVisibility = Visibility.Hidden;
}
else
{
// Determine the position of keytip with respect to Ribbon,
// so that it does not get clipped.
e.KeyTipHorizontalOffset = horizontalOffset;
e.KeyTipVerticalOffset = tabHeaderItemsControlOrigin.Y + tabHeaderOrigin.Y + ActualHeight + KeyTipVerticalOffset;
e.KeyTipHorizontalPlacement = KeyTipHorizontalPlacement.KeyTipCenterAtTargetLeft;
e.KeyTipVerticalPlacement = KeyTipVerticalPlacement.KeyTipCenterAtTargetTop;
e.PlacementTarget = ribbon;
}
}
else
{
e.KeyTipVisibility = Visibility.Hidden;
}
}
}
else
{
e.KeyTipVisibility = Visibility.Hidden;
}
}
}
}
}