/// <summary>
/// Initializes a new instance of the
/// <see cref="T:WinRTXamlToolkit.Controls.TreeView" /> class.
/// </summary>
public TreeView()
{
var pcc = new PropertyChangeEventSource <Style>(this, "ItemContainerStyle");
pcc.ValueChanged += OnItemContainerStylePropertyChanged;
DefaultStyleKey = typeof(TreeView);
ItemsControlHelper = new ItemsControlHelper(this);
Interaction = new InteractionHelper(this);
}
/// <summary>
/// Initializes a new instance of the
/// <see cref="T:WinRTXamlToolkit.Controls.TreeView" /> class.
/// </summary>
public TreeView()
{
var pcc = new PropertyChangeEventSource<Style>(this, "ItemContainerStyle");
pcc.ValueChanged += OnItemContainerStylePropertyChanged;
DefaultStyleKey = typeof(TreeView);
ItemsControlHelper = new ItemsControlHelper(this);
Interaction = new InteractionHelper(this);
}
/// <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(VirtualKey key)
{
ScrollViewer scrollHost = ItemsControlHelper.ScrollHost;
if (scrollHost != null)
{
// Some keys (e.g. Left/Right) need to be translated in RightToLeft mode
VirtualKey invariantKey = InteractionHelper.GetLogicalKey(FlowDirection, key);
switch (invariantKey)
{
case VirtualKey.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 VirtualKey.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 VirtualKey.Home:
scrollHost.ScrollToTop();
return(true);
case VirtualKey.End:
scrollHost.ScrollToBottom();
return(true);
case VirtualKey.Left:
scrollHost.LineLeft();
return(true);
case VirtualKey.Right:
scrollHost.LineRight();
return(true);
case VirtualKey.Up:
scrollHost.LineUp();
return(true);
case VirtualKey.Down:
scrollHost.LineDown();
return(true);
}
}
return(false);
}
/// <summary>
/// Initializes a new instance of the
/// <see cref="T:WinRTXamlToolkit.Controls.TreeViewItem" /> class.
/// </summary>
public TreeViewItem()
{
DefaultStyleKey = typeof(TreeViewItem);
Interaction = new InteractionHelper(this);
}
