partial void OnIsDropDownOpenChangedPartial(bool oldIsDropDownOpen, bool newIsDropDownOpen)
{
// This method will load the itempresenter children
#if __ANDROID__
SetItemsPresenter((_popup.Child as ViewGroup).FindFirstChild <ItemsPresenter>());
#elif __IOS__ || __MACOS__
SetItemsPresenter(_popup.Child.FindFirstChild <ItemsPresenter>());
#endif
if (_popup != null)
{
_popup.IsOpen = newIsDropDownOpen;
}
if (newIsDropDownOpen)
{
DropDownOpened?.Invoke(this, newIsDropDownOpen);
RestoreSelectedItem();
if (SelectedItem != null)
{
ScrollIntoView(SelectedItem);
}
}
else
{
DropDownClosed?.Invoke(this, newIsDropDownOpen);
UpdateContentPresenter();
}
UpdateDropDownState();
}
partial void OnIsDropDownOpenChangedPartial(bool oldIsDropDownOpen, bool newIsDropDownOpen)
{
var(_, popupChild) = LayoutPopup();
if (_popup != null)
{
_popup.IsOpen = newIsDropDownOpen;
}
if (newIsDropDownOpen)
{
DropDownOpened?.Invoke(this, newIsDropDownOpen);
if (popupChild != null)
{
popupChild.SizeChanged += PopupChildChanged;
}
}
else
{
if (popupChild != null)
{
popupChild.SizeChanged -= PopupChildChanged;
}
DropDownClosed?.Invoke(this, newIsDropDownOpen);
}
UpdateDropDownState();
void PopupChildChanged(object snd, SizeChangedEventArgs evt)
{
LayoutPopup();
}
}
partial void OnIsDropDownOpenChangedPartial(bool oldIsDropDownOpen, bool newIsDropDownOpen)
{
if (_popup != null)
{
_popup.IsOpen = newIsDropDownOpen;
}
if (newIsDropDownOpen)
{
DropDownOpened?.Invoke(this, newIsDropDownOpen);
RestoreSelectedItem();
if (SelectedItem != null)
{
ScrollIntoView(SelectedItem);
}
}
else
{
DropDownClosed?.Invoke(this, newIsDropDownOpen);
UpdateContentPresenter();
}
UpdateDropDownState();
}
/// <summary>
/// Hides the drop down.
/// </summary>
public void HideDropDown()
{
if (dropDown != null)
{
dropDown.Hide();
DropDownClosed?.Invoke(this, EventArgs.Empty);
}
}
partial void OnIsDropDownOpenChangedPartial(bool oldIsDropDownOpen, bool newIsDropDownOpen)
{
if (_popup != null)
{
_popup.IsOpen = newIsDropDownOpen;
}
if (newIsDropDownOpen)
{
DropDownOpened?.Invoke(this, newIsDropDownOpen);
}
else
{
DropDownClosed?.Invoke(this, newIsDropDownOpen);
}
UpdateDropDownState();
}
protected virtual void OnDropDownClosed(object e)
{
DropDownClosed?.Invoke(this, null !);
}
/// <summary> /// Raises the <see cref="DropDownClosed"/> event. /// </summary> protected virtual void OnDropDownClosed() => DropDownClosed?.Invoke(this);
private void Popup_Closed(object sender, EventArgs e)
{
DropDownClosed?.Invoke(sender, new EventArgs());
}
protected virtual void OnDropDownClosed(RoutedPropertyChangedEventArgs <bool> e)
{
DropDownClosed?.Invoke(this, e);
}
/// <summary>
/// Invoked when the DropDownClosed event is raised.
/// </summary>
/// <param name="e">Event data for the event.</param>
#if MIGRATION
protected virtual void OnDropDownClosed(EventArgs e)
{
DropDownClosed?.Invoke(this, new RoutedPropertyChangedEventArgs <bool>(true, false));
}
/// <summary>
/// Raises the <see cref="DropDownClosed"/> event.
/// </summary>
/// <param name="eventArgs">
/// <see cref="EventArgs"/> object that provides the arguments for the event.
/// </param>
/// <remarks>
/// <strong>Notes to Inheritors:</strong><br/>
/// When overriding <see cref="OnDropDownClosed"/> in a derived class, be sure to call the base class's
/// <see cref="OnDropDownClosed"/> method so that registered delegates receive the event.
/// </remarks>
protected virtual void OnDropDownClosed(EventArgs eventArgs)
{
DropDownClosed?.Invoke(this, eventArgs);
}