/// <summary>
/// Provides handling for the
/// <see cref="E:System.Windows.UIElement.KeyDown" /> event.
/// </summary>
/// <param name="e">Key event args.</param>
protected override void OnKeyDown(KeyEventArgs e)
{
base.OnKeyDown(e);
if (e.Handled || !IsEnabled)
{
return;
}
// Some keys (e.g. Left/Right) need to be translated in RightToLeft mode
Key invariantKey = InteractionHelper.GetLogicalKey(FlowDirection, e.Key);
bool isExpanded = IsExpanded;
switch (ExpandDirection)
{
case ExpandDirection.Down:
if ((isExpanded && invariantKey == Key.Up) || (!isExpanded && invariantKey == Key.Down))
{
IsExpanded = !isExpanded;
}
break;
case ExpandDirection.Up:
if ((isExpanded && invariantKey == Key.Down) || (!isExpanded && invariantKey == Key.Up))
{
IsExpanded = !isExpanded;
}
break;
case ExpandDirection.Left:
if ((isExpanded && invariantKey == Key.Right) || (!isExpanded && invariantKey == Key.Left))
{
IsExpanded = !isExpanded;
}
break;
case ExpandDirection.Right:
if ((isExpanded && invariantKey == Key.Left) || (!isExpanded && invariantKey == Key.Right))
{
IsExpanded = !isExpanded;
}
break;
}
}
/// <summary>
/// This is the method that responds to the KeyDown event.
/// </summary>
/// <param name="e">
/// A <see cref="T:System.Windows.Input.KeyEventArgs" /> that contains
/// the event data.
/// </param>
protected override void OnKeyDown(KeyEventArgs e)
{
base.OnKeyDown(e);
if (e.Handled)
{
return;
}
// Some keys (e.g. Left/Right) need to be translated in RightToLeft mode
Key invariantKey = InteractionHelper.GetLogicalKey(FlowDirection, e.Key);
TabItem nextTabItem = null;
int direction = 0;
int startIndex = TabControlParent.Items.IndexOf(this);
switch (invariantKey)
{
case Key.Right:
case Key.Down:
direction = 1;
break;
case Key.Left:
case Key.Up:
direction = -1;
break;
default:
return;
}
nextTabItem = TabControlParent.FindNextTabItem(startIndex, direction);
if (nextTabItem != null && nextTabItem != TabControlParent.SelectedItem)
{
e.Handled = true;
TabControlParent.SelectedItem = nextTabItem;
nextTabItem.Focus();
}
}
/// <summary>
/// Handle keys related to scrolling.
/// </summary>
/// <param name="key">The key to handle.</param>
/// <returns>A value indicating whether the key was handled.</returns>
private bool HandleScrollKeys(Key key)
{
ScrollViewer scrollHost = ItemsControlHelper.ScrollHost;
if (scrollHost != null)
{
// Some keys (e.g. Left/Right) need to be translated in RightToLeft mode
Key invariantKey = InteractionHelper.GetLogicalKey(FlowDirection, key);
switch (invariantKey)
{
case Key.PageUp:
// Move horizontally if we've run out of room vertically
if (!NumericExtensions.IsGreaterThan(scrollHost.ExtentHeight, scrollHost.ViewportHeight))
{
scrollHost.PageLeft();
}
else
{
scrollHost.PageUp();
}
return(true);
case Key.PageDown:
// Move horizontally if we've run out of room vertically
if (!NumericExtensions.IsGreaterThan(scrollHost.ExtentHeight, scrollHost.ViewportHeight))
{
scrollHost.PageRight();
}
else
{
scrollHost.PageDown();
}
return(true);
case Key.Home:
scrollHost.ScrollToTop();
return(true);
case Key.End:
scrollHost.ScrollToBottom();
return(true);
case Key.Left:
scrollHost.LineLeft();
return(true);
case Key.Right:
scrollHost.LineRight();
return(true);
case Key.Up:
scrollHost.LineUp();
return(true);
case Key.Down:
scrollHost.LineDown();
return(true);
}
}
return(false);
}
protected override void OnKeyDown(KeyEventArgs e)
{
if (!Interaction.AllowKeyDown(e))
{
return;
}
base.OnKeyDown(e);
if (e.Handled)
{
return;
}
// Some keys (e.g. Left/Right) need to be translated in RightToLeft mode
Key invariantKey = InteractionHelper.GetLogicalKey(FlowDirection, e.Key);
switch (invariantKey)
{
case Key.Left:
{
#if SILVERLIGHT
RatingItem ratingItem = FocusManager.GetFocusedElement() as RatingItem;
#else
RatingItem ratingItem = FocusManager.GetFocusedElement(Application.Current.MainWindow) as RatingItem;
#endif
if (ratingItem != null)
{
ratingItem = GetRatingItemAtOffsetFrom(ratingItem, -1);
}
else
{
ratingItem = GetRatingItems().FirstOrDefault();
}
if (ratingItem != null)
{
if (ratingItem.Focus())
{
e.Handled = true;
}
}
}
break;
case Key.Right:
{
#if SILVERLIGHT
RatingItem ratingItem = FocusManager.GetFocusedElement() as RatingItem;
#else
RatingItem ratingItem = FocusManager.GetFocusedElement(Application.Current.MainWindow) as RatingItem;
#endif
if (ratingItem != null)
{
ratingItem = GetRatingItemAtOffsetFrom(ratingItem, 1);
}
else
{
ratingItem = GetRatingItems().FirstOrDefault();
}
if (ratingItem != null)
{
if (ratingItem.Focus())
{
e.Handled = true;
}
}
}
break;
case Key.Add:
{
if (!this.IsReadOnly)
{
RatingItem ratingItem = GetSelectedRatingItem();
if (ratingItem != null)
{
ratingItem = GetRatingItemAtOffsetFrom(ratingItem, 1);
}
else
{
ratingItem = GetRatingItems().FirstOrDefault();
}
if (ratingItem != null)
{
ratingItem.SelectValue();
e.Handled = true;
}
}
}
break;
case Key.Subtract:
{
if (!this.IsReadOnly)
{
RatingItem ratingItem = GetSelectedRatingItem();
if (ratingItem != null)
{
ratingItem = GetRatingItemAtOffsetFrom(ratingItem, -1);
}
if (ratingItem != null)
{
ratingItem.SelectValue();
e.Handled = true;
}
}
}
break;
}
}
