private void SetupExpandingNodeEvent_Click(object sender, RoutedEventArgs e)
{
if (IsInContentMode())
{
TreeViewItemSource item = new TreeViewItemSource()
{
Content = "Virtualized", HasUnrealizedChildren = true
};
TestTreeViewItemsSource[0].Children.Add(item);
ContentModeTestTreeView.Expanding += ContentModeTestTreeView_Expanding;
}
else
{
_virtualizedNode = new TreeViewNode()
{
Content = "Virtualized"
};
_virtualizedNode.HasUnrealizedChildren = true;
_visualRoot.Children.Add(_virtualizedNode);
TestTreeView.Expanding += TestTreeView_Expanding;
}
}
private ObservableCollection <TreeViewItemSource> PrepareItemsSource()
{
var root0 = new TreeViewItemSource()
{
Content = "Root.0"
};
var root1 = new TreeViewItemSource()
{
Content = "Root.1"
};
var root2 = new TreeViewItemSource()
{
Content = "Root.2"
};
var root = new TreeViewItemSource()
{
Content = "Root", Children = { root0, root1, root2 }
};
return(new ObservableCollection <TreeViewItemSource> {
root
});
}
private ObservableCollection <TreeViewItemSource> PrepareItemsSource(bool expandRootNode = false)
{
var root0 = new TreeViewItemSource()
{
Content = "Root.0"
};
var root1 = new TreeViewItemSource()
{
Content = "Root.1"
};
var root2 = new TreeViewItemSource()
{
Content = "Root.2"
};
var root = new TreeViewItemSource()
{
Content = "Root", Children = { root0, root1, root2 }, IsExpanded = expandRootNode
};
return(new ObservableCollection <TreeViewItemSource> {
root
});
}
public void TreeViewItemsSourceUpdateTest()
{
var treeView = new TreeView();
var items = CreateTreeViewItemsSource();
treeView.ItemsSource = items;
// Insert
var newItem = new TreeViewItemSource()
{
Content = "newItem"
};
items.Add(newItem);
Verify.AreEqual(treeView.RootNodes.Count, 3);
var itemFromNode = treeView.RootNodes[2].Content as TreeViewItemSource;
Verify.AreEqual(newItem.Content, itemFromNode.Content);
// Remove
items.Remove(newItem);
Verify.AreEqual(treeView.RootNodes.Count, 2);
// Replace
var item3 = new TreeViewItemSource()
{
Content = "3"
};
items[1] = item3;
itemFromNode = treeView.RootNodes[1].Content as TreeViewItemSource;
Verify.AreEqual(item3.Content, itemFromNode.Content);
// Clear
items.Clear();
Verify.AreEqual(treeView.RootNodes.Count, 0);
}
