public virtual void ExpanderButtonClickTogglesIsExpanded()
{
TreeView view = new TreeView();
TreeViewItem item = new TreeViewItem { Header = "Item", IsExpanded = true };
TreeViewItem child = new TreeViewItem { Header = "Child" };
view.Items.Add(item);
item.Items.Add(child);
ToggleButton ExpanderButton = null;
AutomationPeer peer = null;
IToggleProvider provider = null;
TestAsync(
5,
view,
() => ExpanderButton = item.GetVisualChild("ExpanderButton") as ToggleButton,
() => Assert.IsNotNull(ExpanderButton, "Failed to find template part ExpanderButton!"),
() => peer = FrameworkElementAutomationPeer.CreatePeerForElement(ExpanderButton),
() => provider = peer.GetPattern(PatternInterface.Toggle) as IToggleProvider,
() => Assert.IsNotNull(provider, "IToggleProvider should not be null!"),
() => provider.Toggle(),
() => Assert.IsFalse(item.IsExpanded, "Item should be collapsed when clicking ExpanderButton!"),
() => provider.Toggle(),
() => Assert.IsTrue(item.IsExpanded, "Item should be expanded when clicking ExpanderButton again!"));
}
public virtual void ExpanderButtonFocusActivatesSelection()
{
StackPanel root = new StackPanel();
TreeView view = new TreeView();
TreeViewItem item = new TreeViewItem { Header = "Item" };
Button button = new Button { Content = "Button" };
view.Items.Add(item);
root.Children.Add(view);
root.Children.Add(button);
ToggleButton ExpanderButton = null;
TestAsync(
5,
root,
() => item.Focus(),
() => Assert.IsTrue(item.IsSelected, "Item should be selected!"),
() => Assert.IsTrue(item.IsSelectionActive, "Selection should be active after focusing!"),
() => button.Focus(),
() => Assert.IsFalse(item.IsSelectionActive, "Selection should be inactive after focusing on something else!"),
() => ExpanderButton = item.GetVisualChild("ExpanderButton") as ToggleButton,
() => Assert.IsNotNull(ExpanderButton, "Failed to find template part ExpanderButton!"),
() => ExpanderButton.Focus(),
() => Assert.IsTrue(item.IsSelectionActive, "Selection should be active after focusing ExpanderButton!"));
}
