public static ToolBarButton CreateGroupContainer(EntityOperationGroup group)
{
ToolBarButton groupButton = new ToolBarButton
{
Content = group.Text(),
ContextMenu = new ContextMenu(),
Background = group.Background,
};
Common.SetOrder(groupButton, group.Order);
AutomationProperties.SetItemStatus(groupButton, "Group");
if (group.AutomationName.HasText())
{
AutomationProperties.SetName(groupButton, group.AutomationName);
}
groupButton.ContextMenu = new ContextMenu
{
PlacementTarget = groupButton,
Placement = PlacementMode.Bottom,
};
ContextMenuService.SetIsEnabled(groupButton, false);
groupButton.Click += (object sender, RoutedEventArgs e) =>
{
ToolBarButton tbb = (ToolBarButton)sender;
tbb.ContextMenu.IsEnabled = true;
tbb.ContextMenu.IsOpen = true;
};
return(groupButton);
}
protected virtual void OnEntityChanged(object oldValue, object newValue)
{
EntityChanged?.Invoke(this, isUserInteraction, oldValue, newValue);
AutomationProperties.SetItemStatus(this, Common.GetEntityStringAndHashCode(newValue));
UpdateVisibility();
}
private void ProcessButton_Click(object sender, RoutedEventArgs e)
{
StatusButton.Text = "Hello Narrator ";
// ACCESSIBILITY BUG FIX:
// Note: WPF does not support LiveRegions and so Narrator will not announce
// the above change made to the static label. One option here would be to
// pop up a message conveying the current status. Instead, for this demo,
// set the UIA ItemStatus property of the button to be the current status.
AutomationProperties.SetItemStatus(ProcessButton, StatusButton.Text);
}
private void OnSorted(object sender, ValueEventArgs <DataGridColumn> valueEventArgs)
{
var sortedColumn = valueEventArgs.Value;
// Get all the column headers in this DataGrid.
List <DataGridColumnHeader> columnHeaders = GetVisualChildCollection <DataGridColumnHeader>(sender as DataGrid);
foreach (DataGridColumnHeader columnHeader in columnHeaders)
{
// If this is not the sorted column, clear any item status that may already exist
// due to the DataGrid havng been previoulsy sorted by this column. If this sample
// app, the ItemStatus is not use for any purpose other than conveying the current
// sort order.
if (columnHeader.Column != sortedColumn)
{
AutomationProperties.SetItemStatus(columnHeader, "");
}
else
{
// Important: At the time of writing this, when SetItemStatus() is
// called below, a UIA PropertyChanged event is automatically raised,
// meaning that screen readers such as Narrator are made aware of the
// change and can make a related accouncement if it wants to. If the
// event were not raise automatically, then an event could be raised
// here by uncommenting all the commented-out the code below.
// Get the current UIA ItemStatus from the header element.
//string oldStatus = AutomationProperties.GetItemStatus(columnHeader);
// Set the new status based on the current sort order.
string newStatus = columnHeader.SortDirection.ToString();
// Now set the new UIA ItemStatus on the header element.
AutomationProperties.SetItemStatus(columnHeader, newStatus);
// If an event were not automatically raised in response to the call
// to SetItemStatus(), then raise a UIA property changed event here.
// Note that the peer may be null here unless a UIA client app such as
// Narrator or the Accessibility Insights for Windows tool are running.
//var peer = FrameAutomationPeer.FromElement(columnHeader);
//if (peer != null)
//{
// peer.RaisePropertyChangedEvent(
// AutomationElementIdentifiers.ItemStatusProperty,
// oldStatus,
// newStatus);
//}
}
}
}
private void OnValidationError(object sender, ValidationErrorEventArgs e)
{
// Get the current UIA ItemStatus from the element element.
var oldStatus = AutomationProperties.GetItemStatus((DependencyObject)sender);
// Set some sample new ItemStatus here...
var newStatus = e.Action == ValidationErrorEventAction.Added ? e.Error.ErrorContent.ToString() : String.Empty;
AutomationProperties.SetItemStatus((DependencyObject)sender, newStatus);
// Having just set the new ItemStatus, raise a UIA property changed event. Note that the peer may
// be null here unless a UIA client app such as Narrator or the AccEvent SDK tool are running.
var automationPeer = UIElementAutomationPeer.FromElement((UIElement)sender);
automationPeer?.RaisePropertyChangedEvent(AutomationElementIdentifiers.ItemStatusProperty, oldStatus, newStatus);
}
static void RegisterUpdater(DependencyObject sender, DependencyPropertyChangedEventArgs args)
{
var fe = (FrameworkElement)sender;
if ((bool)args.NewValue)
{
fe.DataContextChanged += Common_DataContextChanged;
AutomationProperties.SetItemStatus(fe, GetEntityStringAndHashCode(fe.DataContext));
}
else
{
fe.DataContextChanged -= Common_DataContextChanged;
AutomationProperties.SetItemStatus(fe, "");
}
}
private void OnConverterChanged(object converter)
{
AutomationProperties.SetItemStatus(this, ((TimeSpanConverter)converter)?.Format);
}
private void ConverterChanged(object converter)
{
AutomationProperties.SetItemStatus(this, ((NullableNumericConverter)converter)?.Format);
}
static void Common_DataContextChanged(object sender, DependencyPropertyChangedEventArgs e)
{
AutomationProperties.SetItemStatus((DependencyObject)sender, GetEntityStringAndHashCode(e.NewValue));
}
