internal void RaiseSelectionEvents(SelectionChangedEventArgs e)
{
if (base.ItemPeers.Count == 0)
{
base.RaiseAutomationEvent(AutomationEvents.SelectionPatternOnInvalidated);
return;
}
Selector selector = (Selector)base.Owner;
int count = selector._selectedItems.Count;
int count2 = e.AddedItems.Count;
int count3 = e.RemovedItems.Count;
if (count == 1 && count2 == 1)
{
SelectorItemAutomationPeer selectorItemAutomationPeer = this.FindOrCreateItemAutomationPeer(selector._selectedItems[0].Item) as SelectorItemAutomationPeer;
if (selectorItemAutomationPeer != null)
{
selectorItemAutomationPeer.RaiseAutomationEvent(AutomationEvents.SelectionItemPatternOnElementSelected);
return;
}
}
else
{
if (count2 + count3 > 20)
{
base.RaiseAutomationEvent(AutomationEvents.SelectionPatternOnInvalidated);
return;
}
for (int i = 0; i < count2; i++)
{
SelectorItemAutomationPeer selectorItemAutomationPeer2 = this.FindOrCreateItemAutomationPeer(e.AddedItems[i]) as SelectorItemAutomationPeer;
if (selectorItemAutomationPeer2 != null)
{
selectorItemAutomationPeer2.RaiseAutomationEvent(AutomationEvents.SelectionItemPatternOnElementAddedToSelection);
}
}
for (int i = 0; i < count3; i++)
{
SelectorItemAutomationPeer selectorItemAutomationPeer3 = this.FindOrCreateItemAutomationPeer(e.RemovedItems[i]) as SelectorItemAutomationPeer;
if (selectorItemAutomationPeer3 != null)
{
selectorItemAutomationPeer3.RaiseAutomationEvent(AutomationEvents.SelectionItemPatternOnElementRemovedFromSelection);
}
}
}
}
internal void RaiseSelectionEvents(SelectionChangedEventArgs e)
{
if (ItemPeers.Count == 0)
{
// ItemPeers.Count == 0 if children were never fetched.
// in the case, when client probably is not interested in the details
// of selection changes. but we still want to notify client about it.
this.RaiseAutomationEvent(AutomationEvents.SelectionPatternOnInvalidated);
return;
}
Selector owner = (Selector)Owner;
// These counters are bound to selection only numAdded = number of items just added and included in the current selection,
// numRemoved = number of items just removed from the selection, numSelected = total number of items currently selected after addition and removal.
int numSelected = owner._selectedItems.Count;
int numAdded = e.AddedItems.Count;
int numRemoved = e.RemovedItems.Count;
if (numSelected == 1 && numAdded == 1)
{
SelectorItemAutomationPeer peer = FindOrCreateItemAutomationPeer(owner._selectedItems[0].Item) as SelectorItemAutomationPeer;
if (peer != null)
{
peer.RaiseAutomationEvent(AutomationEvents.SelectionItemPatternOnElementSelected);
}
}
else
{
// If more than InvalidateLimit element change their state then we invalidate the selection container
// Otherwise we fire Add/Remove from selection events
if (numAdded + numRemoved > AutomationInteropProvider.InvalidateLimit)
{
this.RaiseAutomationEvent(AutomationEvents.SelectionPatternOnInvalidated);
}
else
{
int i;
for (i = 0; i < numAdded; i++)
{
SelectorItemAutomationPeer peer = FindOrCreateItemAutomationPeer(e.AddedItems[i]) as SelectorItemAutomationPeer;
if (peer != null)
{
peer.RaiseAutomationEvent(AutomationEvents.SelectionItemPatternOnElementAddedToSelection);
}
}
for (i = 0; i < numRemoved; i++)
{
SelectorItemAutomationPeer peer = FindOrCreateItemAutomationPeer(e.RemovedItems[i]) as SelectorItemAutomationPeer;
if (peer != null)
{
peer.RaiseAutomationEvent(AutomationEvents.SelectionItemPatternOnElementRemovedFromSelection);
}
}
}
}
}
