// Selected TabItem content is located under the TabControl style visual tree
///
protected override List<AutomationPeer> GetChildrenCore()
{
// Call the base in case we have children in the header
List<AutomationPeer> headerChildren = base.GetChildrenCore();
// Only if the TabItem is selected we need to add its visual children
TabItem tabItem = GetWrapper() as TabItem;
if (tabItem != null && tabItem.IsSelected)
{
TabControl parentTabControl = ItemsControlAutomationPeer.Owner as TabControl;
if (parentTabControl != null)
{
ContentPresenter contentHost = parentTabControl.SelectedContentPresenter;
if (contentHost != null)
{
AutomationPeer contentHostPeer = new FrameworkElementAutomationPeer(contentHost);
List<AutomationPeer> contentChildren = contentHostPeer.GetChildren();
if (contentChildren != null)
{
if (headerChildren == null)
headerChildren = contentChildren;
else
headerChildren.AddRange(contentChildren);
}
}
}
}
return headerChildren;
}
protected override List<AutomationPeer> GetChildrenCore()
{
List<AutomationPeer> childrenCore = base.GetChildrenCore();
TabItem wrapper = Item as TabItem;
if ((wrapper != null) && wrapper.IsSelected)
{
TabControl control = TabOwner;
if (control == null)
{
return childrenCore;
}
ContentPresenter selectedContentPresenter = control.GetContentHost(control.TabStripPlacement);
if (selectedContentPresenter == null)
{
return childrenCore;
}
List<AutomationPeer> children = new FrameworkElementAutomationPeer(selectedContentPresenter).GetChildren();
if (children == null)
{
return childrenCore;
}
if (childrenCore == null)
{
return children;
}
childrenCore.AddRange(children);
}
return childrenCore;
}
internal static AutomationPeer CreatePeer(UIElement element)
{
AutomationPeer peer = UIElementAutomationPeer.CreatePeerForElement(element);
if (peer == null)
{
FrameworkElement elementFE = element as FrameworkElement;
if (elementFE != null)
peer = new FrameworkElementAutomationPeer(elementFE);
else
peer = new UIElementAutomationPeer(element);
}
return peer;
}
protected override List <AutomationPeer> GetChildrenCore()
{
if (OwningCalendar.MonthControl == null)
{
return(null);
}
List <AutomationPeer> peers = new List <AutomationPeer>();
Dictionary <DateTimeCalendarModePair, DateTimeAutomationPeer> newChildren = new Dictionary <DateTimeCalendarModePair, DateTimeAutomationPeer>();
// Step 1: Add previous, header and next buttons
AutomationPeer buttonPeer;
buttonPeer = FrameworkElementAutomationPeer.CreatePeerForElement(OwningCalendar.MonthControl.PreviousButton);
if (buttonPeer != null)
{
peers.Add(buttonPeer);
}
buttonPeer = FrameworkElementAutomationPeer.CreatePeerForElement(OwningCalendar.MonthControl.HeaderButton);
if (buttonPeer != null)
{
peers.Add(buttonPeer);
}
buttonPeer = FrameworkElementAutomationPeer.CreatePeerForElement(OwningCalendar.MonthControl.NextButton);
if (buttonPeer != null)
{
peers.Add(buttonPeer);
}
// Step 2: Add Calendar Buttons depending on the Calendar.DisplayMode
DateTime date;
DateTimeAutomationPeer peer;
foreach (UIElement child in this.OwningGrid.Children)
{
int childRow = (int)child.GetValue(Grid.RowProperty);
// first row is day titles
if (OwningCalendar.DisplayMode == CalendarMode.Month && childRow == 0)
{
AutomationPeer dayTitlePeer = UIElementAutomationPeer.CreatePeerForElement(child);
if (dayTitlePeer != null)
{
peers.Add(dayTitlePeer);
}
}
else
{
Button owningButton = child as Button;
if (owningButton != null && owningButton.DataContext is DateTime)
{
date = (DateTime)owningButton.DataContext;
peer = GetOrCreateDateTimeAutomationPeer(date, OwningCalendar.DisplayMode, /*addParentInfo*/ false);
peers.Add(peer);
DateTimeCalendarModePair key = new DateTimeCalendarModePair(date, OwningCalendar.DisplayMode);
newChildren.Add(key, peer);
}
}
}
DateTimePeers = newChildren;
return(peers);
}
virtual internal AutomationPeer GetWrapperPeer()
{
AutomationPeer wrapperPeer = null;
UIElement wrapper = GetWrapper();
if(wrapper != null)
{
wrapperPeer = UIElementAutomationPeer.CreatePeerForElement(wrapper);
if(wrapperPeer == null) //fall back to default peer if there is no specific one
{
if(wrapper is FrameworkElement)
wrapperPeer = new FrameworkElementAutomationPeer((FrameworkElement)wrapper);
else
wrapperPeer = new UIElementAutomationPeer(wrapper);
}
}
return wrapperPeer;
}
protected override System.Collections.Generic.List<AutomationPeer> GetChildrenCore()
{
// If Ribbon is Collapsed, dont show anything in the UIA tree
if (OwningRibbon.IsCollapsed)
{
return null;
}
List<AutomationPeer> children = new List<AutomationPeer>();
// Step1: Add QAT + Title + ContextualTabGroupHeaderItemsControl
if (OwningRibbon.QuickAccessToolBar != null)
{
AutomationPeer peer = CreatePeerForElement(OwningRibbon.QuickAccessToolBar);
if (peer != null)
{
children.Add(peer);
}
}
if (OwningRibbon.TitleHost != null)
{
AutomationPeer peer = CreatePeerForElement(OwningRibbon.TitleHost);
if (peer == null)
{
FrameworkElement titleHost = OwningRibbon.TitleHost as FrameworkElement;
if (titleHost != null)
peer = new RibbonTitleAutomationPeer(titleHost);
else
peer = new UIElementAutomationPeer(OwningRibbon.TitleHost);
}
children.Add(peer);
}
if (OwningRibbon.ContextualTabGroupItemsControl != null)
{
AutomationPeer peer = CreatePeerForElement(OwningRibbon.ContextualTabGroupItemsControl);
if (peer != null)
{
children.Add(peer);
}
}
// Step2: Add ApplicationMenu
if (OwningRibbon.ApplicationMenu != null)
{
AutomationPeer peer = CreatePeerForElement(OwningRibbon.ApplicationMenu);
if (peer != null)
{
children.Add(peer);
}
}
// Step3: Refresh RibbonTabHeaders
// RibbonTabHeaderItemsControl doesnt appear in the UIA Tree, but its children RibbonTabHeader appear as children of RibbonTab
// We need to ensure that RibbonTabHeader peers are created and refreshed manually here
if (OwningRibbon.RibbonTabHeaderItemsControl != null)
{
// We are unable to use this commented piece of code because ForceEnsureChildren
// is an internal method in .Net 4.0. The public alternative is to use
// AutomationPeer.ResetChildrenCache. However this methods isn't appropriate to be
// called during a GetChildrenCore call because it causes a recursive call to the
// GetChildren call for the current AutomationPeer which is prohibited. For
// illustration here's a callstack.
// Exception:System.InvalidOperationException: Recursive call to Automation Peer API is not valid. at
// System.Windows.Automation.Peers.AutomationPeer.GetChildren() at
// System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(AutomationPeer parent) at
// System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(AutomationPeer parent) at
// System.Windows.Automation.Peers.AutomationPeer.ValidateConnected(AutomationPeer connectedPeer) at
// MS.Internal.Automation.ElementProxy.StaticWrap(AutomationPeer peer, AutomationPeer referencePeer) at
// System.Windows.Automation.Peers.AutomationPeer.UpdateChildrenInternal(Int32 invalidateLimit) at
// System.Windows.Automation.Peers.ItemsControlAutomationPeer.UpdateChildren() at
// Microsoft.Windows.Automation.Peers.RibbonAutomationPeer.GetChildrenCore() at
// Also note that this code path is hit only when the UIA client is listening for
// structure changed events. UI Spy for instance doesn't do this by default and
// hence you will not automatically see the above crash it in that case. You need
// to configure the events to include structure changed.
// -----------------------------------------------------------------------------------------
// AutomationPeer peer = CreateItemAutomationPeer(OwningRibbon.RibbonTabHeaderItemsControl);
// if (peer != null)
// {
// peer.ForceEnsureChildren();
// }
// -----------------------------------------------------------------------------------------
// The strategy to create a new instance of the AutomationPeer is a workaround to
// the above limitation. It is important to create a new instance each time so
// that we guarantee that the children are in fact updated. A GetChildren call on
// a previously existing AutomationPeer will short circuit due to the _childrenValid
// flag. Hence the creation of a new AutomationPeer object each time around. Note
// that it is only this one AutomationPeer instanced that is created anew each time.
// The Peers for the descendents are not recreated.
AutomationPeer peer = new RibbonTabHeaderItemsControlAutomationPeer(OwningRibbon.RibbonTabHeaderItemsControl);
peer.GetChildren();
}
// Step4: Add RibbonTabs
List<AutomationPeer> ribbonTabs = base.GetChildrenCore();
if (ribbonTabs != null && ribbonTabs.Count > 0)
{
children.AddRange(ribbonTabs);
}
// Step5: Add HelpPane that appears next to TabPanel
UIElement helpPaneHost = OwningRibbon.HelpPaneHost;
if (helpPaneHost != null)
{
AutomationPeer peer = CreatePeerForElement(helpPaneHost);
if (peer == null)
{
FrameworkElement helpPaneHostFE = helpPaneHost as FrameworkElement;
if (helpPaneHostFE != null)
peer = new FrameworkElementAutomationPeer(helpPaneHostFE);
else
peer = new UIElementAutomationPeer(helpPaneHost);
}
children.Add(peer);
}
return children;
}
public FrameworkElementAutomationPeer(FrameworkElement owner)
{
if (owner == null)
{
throw new ArgumentNullException("owner");
}
this.owner = owner;
isKeyboardFocusable = null;
// Default Automation events
owner.SizeChanged += (o, s) => {
Point location = GetLocation(owner);
RaisePropertyChangedEvent(AutomationElementIdentifiers.BoundingRectangleProperty,
new Rect(0, 0, s.PreviousSize.Width, s.PreviousSize.Height),
new Rect(location.X, location.Y, s.NewSize.Width, s.NewSize.Height));
};
owner.UIAVisibilityChanged += (o, e) => {
IAutomationCacheProperty cachedProperty
= GetCachedProperty(AutomationElementIdentifiers.BoundingRectangleProperty);
Rect newValue = GetBoundingRectangle();
RaisePropertyChangedEvent(AutomationElementIdentifiers.BoundingRectangleProperty,
cachedProperty.OldValue,
newValue);
RaiseIsKeyboardFocusableEvent();
bool isOffscreen = IsOffscreen();
RaisePropertyChangedEvent(AutomationElementIdentifiers.IsOffscreenProperty,
!isOffscreen,
isOffscreen);
};
Control control = owner as Control;
if (control != null)
{
control.IsEnabledChanged += (o, e) => {
RaisePropertyChangedEvent(AutomationElementIdentifiers.IsEnabledProperty,
e.OldValue,
e.NewValue);
RaiseIsKeyboardFocusableEvent();
};
control.UIAIsTabStopChanged += (o, e) => {
RaiseIsKeyboardFocusableEvent();
};
// StructureChanged
ContentControl contentControl = control as ContentControl;
if (contentControl != null)
{
contentControl.UIAContentChanged += OnContentChanged;
AddItemsChangedToPanel(contentControl.Content);
}
}
// SWA.AutomationProperties events
owner.AcceleratorKeyChanged += (o, e) => {
RaisePropertyChangedEvent(AutomationElementIdentifiers.AcceleratorKeyProperty,
e.OldValue,
e.NewValue);
};
owner.AccessKeyChanged += (o, e) => {
RaisePropertyChangedEvent(AutomationElementIdentifiers.AccessKeyProperty,
e.OldValue,
e.NewValue);
};
owner.AutomationIdChanged += (o, e) => {
RaisePropertyChangedEvent(AutomationElementIdentifiers.AutomationIdProperty,
e.OldValue,
e.NewValue);
};
owner.HelpTextChanged += (o, e) => {
RaisePropertyChangedEvent(AutomationElementIdentifiers.HelpTextProperty,
e.OldValue,
e.NewValue);
};
owner.IsRequiredForFormChanged += (o, e) => {
RaisePropertyChangedEvent(AutomationElementIdentifiers.IsRequiredForFormProperty,
e.OldValue,
e.NewValue);
};
owner.ItemStatusChanged += (o, e) => {
RaisePropertyChangedEvent(AutomationElementIdentifiers.ItemStatusProperty,
e.OldValue,
e.NewValue);
};
owner.ItemTypeChanged += (o, e) => {
RaisePropertyChangedEvent(AutomationElementIdentifiers.ItemTypeProperty,
e.OldValue,
e.NewValue);
};
// LabeledBy and Name properties are "special" because they somehow depend on each other.
owner.LabeledByChanged += (o, e) => {
RaisePropertyChangedEvent(AutomationElementIdentifiers.LabeledByProperty,
e.OldValue,
e.NewValue);
// Name property
UIElement labeledByOld = e.OldValue as UIElement;
if (labeledByOld != null)
{
FrameworkElementAutomationPeer peer
= FrameworkElementAutomationPeer.CreatePeerForElement(labeledByOld) as FrameworkElementAutomationPeer;
if (peer != null)
{
peer.NameChanged -= LabeledBy_NameChanged;
}
}
UIElement labeledByNew = e.NewValue as UIElement;
if (labeledByNew != null)
{
FrameworkElementAutomationPeer peer
= FrameworkElementAutomationPeer.CreatePeerForElement(labeledByNew) as FrameworkElementAutomationPeer;
if (peer != null)
{
peer.NameChanged += LabeledBy_NameChanged;
}
}
RaiseNameChanged();
};
owner.NameChanged += (o, e) => RaiseNameChanged();
}
