// Test is not working on Windows 8 due to changes in Explorer
public void VirtualizedPatternTest()
{
AutomationElement itemsView = ExplorerTargetTests.explorerHost.Element.FindFirst(TreeScope.TreeScope_Subtree,
new PropertyCondition(AutomationElement.ClassNameProperty, "UIItemsView"));
Assert.IsNotNull(itemsView);
// Get the container
Assert.IsTrue((bool)itemsView.GetCurrentPropertyValue(AutomationElement.IsItemContainerPatternAvailableProperty));
ItemContainerPattern container = (ItemContainerPattern)itemsView.GetCurrentPattern(ItemContainerPattern.Pattern);
// Look for something we know is there and is probably below the fold
AutomationElement item1 = container.FindItemByProperty(null, AutomationElement.NameProperty, "winver");
Assert.IsNotNull(item1);
// Let's get another one
AutomationElement item2 = container.FindItemByProperty(item1, AutomationElement.NameProperty, "xcopy");
Assert.IsNotNull(item2);
// Check the bounding rect -- should be empty
Rectangle rect1 = item2.Current.BoundingRectangle;
Assert.AreEqual(0, rect1.Width);
Assert.AreEqual(0, rect1.Height);
// Get the virtualized pattern
Assert.IsTrue((bool)item2.GetCurrentPropertyValue(AutomationElement.IsVirtualizedItemPatternAvailableProperty));
VirtualizedItemPattern virtItem2 = (VirtualizedItemPattern)item2.GetCurrentPattern(VirtualizedItemPattern.Pattern);
Assert.IsNotNull(item2);
// Realize the item and give the window a moment to scroll
virtItem2.Realize();
System.Threading.Thread.Sleep(100 /* ms */);
// Check the bounding rect now - should not be empty
Rectangle rect2 = item2.Current.BoundingRectangle;
Assert.AreNotEqual(0, rect2.Width);
Assert.AreNotEqual(0, rect2.Height);
}
public static bool TryGetVirtualizedItemPattern(this AutomationElement element, out VirtualizedItemPattern result)
{
if (element.TryGetCurrentPattern(System.Windows.Automation.VirtualizedItemPattern.Pattern, out var pattern))
{
result = (VirtualizedItemPattern)pattern;
return(true);
}
result = null;
return(false);
}
