public virtual void TreeViewPeerSupportsScrolling()
{
// Note: This test fails if ItemsSource isn't set because it
// requires a container to find the ItemsHost and ScrollHost.
TreeView view = new TreeView {
ItemsSource = new int[] { 1, 2, 3 }
};
TreeViewAutomationPeer peer = null;
IScrollProvider provider = null;
TestAsync(
view,
() => peer = FrameworkElementAutomationPeer.CreatePeerForElement(view) as TreeViewAutomationPeer,
() => provider = peer.GetPattern(PatternInterface.Scroll) as IScrollProvider,
() => Assert.IsNotNull(provider, "IScrollProvider peer should not be null!"),
() =>
{
FrameworkElementAutomationPeer scroll = provider as FrameworkElementAutomationPeer;
Assert.IsNotNull(scroll, "IScrollProvider should be an automation peer!");
Assert.IsInstanceOfType(scroll.Owner, typeof(ScrollViewer), "IScrollProvider should wrap a ScrollViewer!");
for (UIElement current = scroll.Owner; current != null; current = VisualTreeHelper.GetParent(current) as UIElement)
{
if (current == view)
{
return;
}
}
Assert.Fail("IScrollProvider should be an automation peer for a child of the TreeView!");
});
}
public static ScrollViewer GetScrollViewer(this TreeView treeView1)
{
TreeViewAutomationPeer vap = new TreeViewAutomationPeer(treeView1);
var svap = vap.GetPattern(PatternInterface.Scroll) as ScrollViewerAutomationPeer;
var scroller = svap.Owner as ScrollViewer;
return(scroller);
}
public virtual void TreeViewPeerGetNoItems()
{
TreeView view = new TreeView();
TreeViewAutomationPeer peer = null;
TestAsync(
view,
() => peer = FrameworkElementAutomationPeer.CreatePeerForElement(view) as TreeViewAutomationPeer,
() => Assert.IsNull(peer.GetChildren(), "There should be no children when the TreeView does not have items!"));
}
/// <summary>
/// Notify the tree update when search is complete.
/// </summary>
private void FireAsyncContentLoadedEvent()
{
if (AutomationPeer.ListenerExists(AutomationEvents.AsyncContentLoaded))
{
TreeViewAutomationPeer peer = UIElementAutomationPeer.FromElement(this.treeviewHierarchy) as TreeViewAutomationPeer;
if (peer != null)
{
peer.RaiseAsyncContentLoadedEvent(new AsyncContentLoadedEventArgs(AsyncContentLoadedState.Completed, 100));
}
}
}
public static ScrollViewer GetTreeViewScrollViewer(TreeView treeView)
{
//对于TreeView而言:
TreeViewAutomationPeer lvap = new TreeViewAutomationPeer(treeView);
var svap = lvap.GetPattern(PatternInterface.Scroll) as ScrollViewerAutomationPeer;
var scroll = svap?.Owner as ScrollViewer;
return(scroll);
//////////////////////////此处添加你想要对TreeView自身滚动条的操作///////////////////////////
// scroll.ScrollToVerticalOffset(scroll.VerticalOffset+1); //向下调节垂直滚动条的位置;
}
public virtual void TreeViewAutomationPeerTypeAndClass()
{
TreeView view = new TreeView();
TreeViewAutomationPeer peer = null;
TestAsync(
view,
() => peer = FrameworkElementAutomationPeer.CreatePeerForElement(view) as TreeViewAutomationPeer,
() => Assert.AreEqual(AutomationControlType.Tree, peer.GetAutomationControlType(), "Unexpected AutomationControlType!"),
() => Assert.AreEqual("TreeView", peer.GetClassName(), "Unexpected ClassType!"));
}
public virtual void TreeViewCreatesAutomationPeer()
{
TreeView view = new TreeView();
TreeViewAutomationPeer peer = null;
TestAsync(
view,
() => peer = FrameworkElementAutomationPeer.CreatePeerForElement(view) as TreeViewAutomationPeer,
() => Assert.IsNotNull(peer, "TreeView peer should not be null!"),
() => Assert.AreEqual(view, peer.Owner, "TreeView should be owner of the peer!"));
}
public virtual void TreeViewPeerSupportsSelection()
{
TreeView view = new TreeView();
TreeViewAutomationPeer peer = null;
ISelectionProvider provider = null;
TestAsync(
view,
() => peer = FrameworkElementAutomationPeer.CreatePeerForElement(view) as TreeViewAutomationPeer,
() => provider = peer.GetPattern(PatternInterface.Selection) as ISelectionProvider,
() => Assert.IsNotNull(provider, "ISelectionProvider peer should not be null!"));
}
public virtual void TreeViewPeerGetWithItems()
{
TreeView view = new TreeView {
ItemsSource = new int[] { 1, 2, 3 }
};
TreeViewAutomationPeer peer = null;
List <AutomationPeer> items = null;
TestAsync(
view,
() => peer = FrameworkElementAutomationPeer.CreatePeerForElement(view) as TreeViewAutomationPeer,
() => items = peer.GetChildren(),
() => Assert.AreEqual(3, items.Count, "Unexpected number of child peers!"),
() => Assert.IsInstanceOfType(items[0], typeof(TreeViewItemAutomationPeer), "Child peer is not a TreeViewItemAutomationPeer!"));
}
public virtual void TreeViewPeerOnlySupportsScrollingAndSelection()
{
TreeView view = new TreeView();
TreeViewAutomationPeer peer = null;
TestAsync(
view,
() => peer = FrameworkElementAutomationPeer.CreatePeerForElement(view) as TreeViewAutomationPeer,
() => Assert.IsNull(peer.GetPattern(PatternInterface.Dock), "TreeViewAutomationPeer should not support the Dock pattern!"),
() => Assert.IsNull(peer.GetPattern(PatternInterface.ExpandCollapse), "TreeViewAutomationPeer should not support the ExpandCollapse pattern!"),
() => Assert.IsNull(peer.GetPattern(PatternInterface.Grid), "TreeViewAutomationPeer should not support the Grid pattern!"),
() => Assert.IsNull(peer.GetPattern(PatternInterface.GridItem), "TreeViewAutomationPeer should not support the GridItem pattern!"),
() => Assert.IsNull(peer.GetPattern(PatternInterface.Invoke), "TreeViewAutomationPeer should not support the Dock pattern!"),
() => Assert.IsNull(peer.GetPattern(PatternInterface.MultipleView), "TreeViewAutomationPeer should not support the MultipleView pattern!"),
() => Assert.IsNull(peer.GetPattern(PatternInterface.RangeValue), "TreeViewAutomationPeer should not support the RangeValue pattern!"),
() => Assert.IsNull(peer.GetPattern(PatternInterface.ScrollItem), "TreeViewAutomationPeer should not support the ScrollItem pattern!"),
() => Assert.IsNull(peer.GetPattern(PatternInterface.SelectionItem), "TreeViewAutomationPeer should not support the SelectionItem pattern!"),
() => Assert.IsNull(peer.GetPattern(PatternInterface.Table), "TreeViewAutomationPeer should not support the Table pattern!"),
() => Assert.IsNull(peer.GetPattern(PatternInterface.TableItem), "TreeViewAutomationPeer should not support the TableItem pattern!"),
() => Assert.IsNull(peer.GetPattern(PatternInterface.Toggle), "TreeViewAutomationPeer should not support the Toggle pattern!"),
() => Assert.IsNull(peer.GetPattern(PatternInterface.Transform), "TreeViewAutomationPeer should not support the Transform pattern!"),
() => Assert.IsNull(peer.GetPattern(PatternInterface.Value), "TreeViewAutomationPeer should not support the Value pattern!"),
() => Assert.IsNull(peer.GetPattern(PatternInterface.Window), "TreeViewAutomationPeer should not support the Window pattern!"));
}
