private void OnselectionModelChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e)
{
if (e.PropertyName == "SelectedIndices")
{
bool?oldValue = IsSelected;
var indexPath = GetIndexPath();
bool?newValue = IsRealized(indexPath) ? SelectionModel.IsSelectedAt(indexPath) : false;
if (oldValue != newValue)
{
IsSelected = newValue;
bool oldValueAsBool = oldValue.HasValue && oldValue.Value;
bool newValueAsBool = newValue.HasValue && newValue.Value;
if (oldValueAsBool != newValueAsBool)
{
// AutomationEvents.PropertyChanged is used as a value that means dont raise anything
AutomationEvents eventToRaise =
oldValueAsBool ?
(SelectionModel.SingleSelect ? AutomationEvents.PropertyChanged : AutomationEvents.SelectionItemPatternOnElementRemovedFromSelection) :
(SelectionModel.SingleSelect ? AutomationEvents.SelectionItemPatternOnElementSelected : AutomationEvents.SelectionItemPatternOnElementAddedToSelection);
if (eventToRaise != AutomationEvents.PropertyChanged && AutomationPeer.ListenerExists(eventToRaise))
{
var peer = FrameworkElementAutomationPeer.CreatePeerForElement(this);
peer.RaiseAutomationEvent(eventToRaise);
}
}
}
}
}
protected override void OnKeyUp(KeyEventArgs e)
{
var indexPath = GetIndexPath();
Debug.WriteLine("OnKeyUp:" + indexPath.ToString());
if (SelectionModel != null)
{
if (e.Key == Key.Escape)
{
SelectionModel.ClearSelection();
}
else if (e.Key == Key.Space)
{
SelectionModel.SelectAt(indexPath);
}
else if (!SelectionModel.SingleSelect)
{
var isShiftPressed = Keyboard.Modifiers.HasFlag(ModifierKeys.Shift);
var isCtrlPressed = Keyboard.Modifiers.HasFlag(ModifierKeys.Control);
if (e.Key == Key.A && isCtrlPressed)
{
SelectionModel.SelectAll();
}
else if (isCtrlPressed && e.Key == Key.Space)
{
if (SelectionModel.IsSelectedAt(indexPath).Value)
{
SelectionModel.DeselectAt(indexPath);
}
else
{
SelectionModel.SelectAt(indexPath);
}
}
else if (isShiftPressed)
{
SelectionModel.SelectRangeFromAnchorTo(GetIndexPath());
}
}
}
base.OnKeyUp(e);
}
protected override void OnMouseLeftButtonDown(MouseButtonEventArgs e)
{
if (!e.Handled)
{
var indexPath = GetIndexPath();
Debug.WriteLine("OnPointerPressed:" + indexPath.ToString());
if (SelectionModel != null)
{
if (Keyboard.Modifiers.HasFlag(ModifierKeys.Shift) && !SelectionModel.SingleSelect)
{
if (Keyboard.Modifiers.HasFlag(ModifierKeys.Control))
{
SelectionModel.DeselectRangeFromAnchorTo(GetIndexPath());
}
else
{
SelectionModel.SelectRangeFromAnchorTo(GetIndexPath());
}
}
else if (Keyboard.Modifiers.HasFlag(ModifierKeys.Control))
{
var path = GetIndexPath();
if (SelectionModel.IsSelectedAt(path).Value)
{
SelectionModel.SelectAt(path);
}
else
{
SelectionModel.SelectAt(path);
}
}
else
{
SelectionModel.SelectAt(GetIndexPath());
this.Focus();
}
}
e.Handled = true;
base.OnMouseLeftButtonDown(e);
}
}