private void RaiseVisibilityEvents(bool isOffscreen)
{
IAutomationCacheProperty cachedProperty
= GetCachedProperty(AutomationElementIdentifiers.BoundingRectangleProperty);
Rect newValue = GetBoundingRectangle();
RaisePropertyChangedEvent(AutomationElementIdentifiers.BoundingRectangleProperty,
cachedProperty.OldValue,
newValue);
RaisePropertyChangedEvent(AutomationElementIdentifiers.IsOffscreenProperty,
!isOffscreen,
isOffscreen);
}
// Raises UIA Event (NameProperty) and internal event (NameChanged)
// NOTE: This method MUST BE called by AutomationPeers overriding GetNameCore().
internal override void RaiseNameChanged()
{
IAutomationCacheProperty cachedProperty
= GetCachedProperty(AutomationElementIdentifiers.NameProperty);
string newValue = GetName();
if (!object.Equals(newValue, cachedProperty.OldValue))
{
RaisePropertyChangedEvent(AutomationElementIdentifiers.NameProperty,
cachedProperty.OldValue,
newValue);
if (NameChanged != null)
{
NameChanged(this, EventArgs.Empty);
}
}
}
public void RaisePropertyChangedEvent(AutomationPeer peer,
AutomationProperty property,
object oldValue,
object newValue)
{
if (!AccessibilityEnabled || peer == null)
{
return;
}
if (object.Equals(newValue, oldValue))
{
return;
}
// We are going to raise changes only when the value ACTUALLY CHANGES
IAutomationCacheProperty cachedProperty = peer.GetCachedProperty(property);
if (cachedProperty != null)
{
if (object.Equals(newValue, cachedProperty.OldValue))
{
return;
}
cachedProperty.OldValue = newValue;
}
if (AutomationPropertyChanged != null)
{
AutomationPropertyChanged(this,
new AutomationPropertyChangedEventArgs(peer,
property,
oldValue,
newValue));
}
}
// Method used to cache main properties to RaisePropertyChanged when calling
// InvalidatePeer. This method is also called by FrameworkElementAutomationPeer.CreatePeerForElement
internal void CacheMainProperties ()
{
// We are keeping a list of cached properties to raise events depending on the
// accessibility status, because the bridge is loaded by request, ie,
// when an AT requests a11y information is loaded
if (cacheProperties == null) {
// Main properties defined in AutomationElementIdentifiers static fields
cacheProperties = new IAutomationCacheProperty[] {
new AutomationCacheProperty<string> () { Property = AutomationElementIdentifiers.AcceleratorKeyProperty,
OldValue = GetAcceleratorKey (),
Delegate = GetAcceleratorKey },
new AutomationCacheProperty<string> () { Property = AutomationElementIdentifiers.AccessKeyProperty,
OldValue = GetAccessKey (),
Delegate = GetAccessKey },
new AutomationCacheProperty<string> () { Property = AutomationElementIdentifiers.AutomationIdProperty,
OldValue = GetAutomationId (),
Delegate = GetAutomationId },
new AutomationCacheProperty<string> () { Property = AutomationElementIdentifiers.ClassNameProperty,
OldValue = GetClassName (),
Delegate = GetClassName },
new AutomationCacheProperty<string> () { Property = AutomationElementIdentifiers.HelpTextProperty,
OldValue = GetHelpText (),
Delegate = GetHelpText },
new AutomationCacheProperty<string> () { Property = AutomationElementIdentifiers.ItemStatusProperty,
OldValue = GetItemStatus (),
Delegate = GetItemStatus },
new AutomationCacheProperty<string> () { Property = AutomationElementIdentifiers.ItemTypeProperty,
OldValue = GetItemType (),
Delegate = GetItemType },
new AutomationCacheProperty<string> () { Property = AutomationElementIdentifiers.NameProperty,
OldValue = GetName (),
Delegate = GetName },
new AutomationCacheProperty<string> () { Property = AutomationElementIdentifiers.LocalizedControlTypeProperty,
OldValue = GetLocalizedControlType (),
Delegate = GetLocalizedControlType },
new AutomationCacheProperty<bool> () { Property = AutomationElementIdentifiers.HasKeyboardFocusProperty,
OldValue = HasKeyboardFocus (),
Delegate = HasKeyboardFocus },
new AutomationCacheProperty<bool> () { Property = AutomationElementIdentifiers.IsOffscreenProperty,
OldValue = IsOffscreen (),
Delegate = IsOffscreen },
new AutomationCacheProperty<bool> () { Property = AutomationElementIdentifiers.IsContentElementProperty,
OldValue = IsContentElement (),
Delegate = IsContentElement },
new AutomationCacheProperty<bool> () { Property = AutomationElementIdentifiers.IsControlElementProperty,
OldValue = IsControlElement (),
Delegate = IsControlElement },
new AutomationCacheProperty<bool> () { Property = AutomationElementIdentifiers.IsEnabledProperty,
OldValue = IsEnabled (),
Delegate = IsEnabled },
new AutomationCacheProperty<bool> () { Property = AutomationElementIdentifiers.IsPasswordProperty,
OldValue = IsPassword (),
Delegate = IsPassword },
new AutomationCacheProperty<bool> () { Property = AutomationElementIdentifiers.IsRequiredForFormProperty,
OldValue = IsRequiredForForm (),
Delegate = IsRequiredForForm },
new AutomationCacheProperty<bool> () { Property = AutomationElementIdentifiers.IsKeyboardFocusableProperty,
OldValue = IsKeyboardFocusable (),
Delegate = IsKeyboardFocusable },
new AutomationCacheProperty<Rect> () { Property = AutomationElementIdentifiers.BoundingRectangleProperty,
OldValue = GetBoundingRectangle (),
Delegate = GetBoundingRectangle },
new AutomationCacheProperty<Point> () { Property = AutomationElementIdentifiers.ClickablePointProperty,
OldValue = GetClickablePoint (),
Delegate = GetClickablePoint },
new AutomationCachePeerProperty () { Property = AutomationElementIdentifiers.LabeledByProperty,
OldValue = GetLabeledBy (),
Delegate = GetLabeledBy },
new AutomationCacheProperty<AutomationOrientation> () { Property = AutomationElementIdentifiers.OrientationProperty,
OldValue = GetOrientation (),
Delegate = GetOrientation },
new AutomationCacheProperty<AutomationControlType> () { Property = AutomationElementIdentifiers.ControlTypeProperty,
OldValue = GetAutomationControlType (),
Delegate = GetAutomationControlType }
};
}
}
// Method used to cache main properties to RaisePropertyChanged when calling
// InvalidatePeer. This method is also called by FrameworkElementAutomationPeer.CreatePeerForElement
internal void CacheMainProperties()
{
// We are keeping a list of cached properties to raise events depending on the
// accessibility status, because the bridge is loaded by request, ie,
// when an AT requests a11y information is loaded
if (cacheProperties == null)
{
// Main properties defined in AutomationElementIdentifiers static fields
cacheProperties = new IAutomationCacheProperty[] {
new AutomationCacheProperty <string> ()
{
Property = AutomationElementIdentifiers.AcceleratorKeyProperty,
OldValue = GetAcceleratorKey(),
Delegate = GetAcceleratorKey
},
new AutomationCacheProperty <string> ()
{
Property = AutomationElementIdentifiers.AccessKeyProperty,
OldValue = GetAccessKey(),
Delegate = GetAccessKey
},
new AutomationCacheProperty <string> ()
{
Property = AutomationElementIdentifiers.AutomationIdProperty,
OldValue = GetAutomationId(),
Delegate = GetAutomationId
},
new AutomationCacheProperty <string> ()
{
Property = AutomationElementIdentifiers.ClassNameProperty,
OldValue = GetClassName(),
Delegate = GetClassName
},
new AutomationCacheProperty <string> ()
{
Property = AutomationElementIdentifiers.HelpTextProperty,
OldValue = GetHelpText(),
Delegate = GetHelpText
},
new AutomationCacheProperty <string> ()
{
Property = AutomationElementIdentifiers.ItemStatusProperty,
OldValue = GetItemStatus(),
Delegate = GetItemStatus
},
new AutomationCacheProperty <string> ()
{
Property = AutomationElementIdentifiers.ItemTypeProperty,
OldValue = GetItemType(),
Delegate = GetItemType
},
new AutomationCacheProperty <string> ()
{
Property = AutomationElementIdentifiers.NameProperty,
OldValue = GetName(),
Delegate = GetName
},
new AutomationCacheProperty <string> ()
{
Property = AutomationElementIdentifiers.LocalizedControlTypeProperty,
OldValue = GetLocalizedControlType(),
Delegate = GetLocalizedControlType
},
new AutomationCacheProperty <bool> ()
{
Property = AutomationElementIdentifiers.HasKeyboardFocusProperty,
OldValue = HasKeyboardFocus(),
Delegate = HasKeyboardFocus
},
new AutomationCacheProperty <bool> ()
{
Property = AutomationElementIdentifiers.IsOffscreenProperty,
OldValue = IsOffscreen(),
Delegate = IsOffscreen
},
new AutomationCacheProperty <bool> ()
{
Property = AutomationElementIdentifiers.IsContentElementProperty,
OldValue = IsContentElement(),
Delegate = IsContentElement
},
new AutomationCacheProperty <bool> ()
{
Property = AutomationElementIdentifiers.IsControlElementProperty,
OldValue = IsControlElement(),
Delegate = IsControlElement
},
new AutomationCacheProperty <bool> ()
{
Property = AutomationElementIdentifiers.IsEnabledProperty,
OldValue = IsEnabled(),
Delegate = IsEnabled
},
new AutomationCacheProperty <bool> ()
{
Property = AutomationElementIdentifiers.IsPasswordProperty,
OldValue = IsPassword(),
Delegate = IsPassword
},
new AutomationCacheProperty <bool> ()
{
Property = AutomationElementIdentifiers.IsRequiredForFormProperty,
OldValue = IsRequiredForForm(),
Delegate = IsRequiredForForm
},
new AutomationCacheProperty <bool> ()
{
Property = AutomationElementIdentifiers.IsKeyboardFocusableProperty,
OldValue = IsKeyboardFocusable(),
Delegate = IsKeyboardFocusable
},
new AutomationCacheProperty <Rect> ()
{
Property = AutomationElementIdentifiers.BoundingRectangleProperty,
OldValue = GetBoundingRectangle(),
Delegate = GetBoundingRectangle
},
new AutomationCacheProperty <Point> ()
{
Property = AutomationElementIdentifiers.ClickablePointProperty,
OldValue = GetClickablePoint(),
Delegate = GetClickablePoint
},
new AutomationCachePeerProperty()
{
Property = AutomationElementIdentifiers.LabeledByProperty,
OldValue = GetLabeledBy(),
Delegate = GetLabeledBy
},
new AutomationCacheProperty <AutomationOrientation> ()
{
Property = AutomationElementIdentifiers.OrientationProperty,
OldValue = GetOrientation(),
Delegate = GetOrientation
},
new AutomationCacheProperty <AutomationControlType> ()
{
Property = AutomationElementIdentifiers.ControlTypeProperty,
OldValue = GetAutomationControlType(),
Delegate = GetAutomationControlType
}
};
}
}
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();
}