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();
}
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__
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);
}
else
{
DropDownClosed?.Invoke(this, newIsDropDownOpen);
}
UpdateDropDownState();
}
protected virtual void OnDropDownOpened(object e)
{
DropDownOpened?.Invoke(this, null !);
}
/// <summary> /// Raises the <see cref="DropDownOpened"/> event. /// </summary> protected virtual void OnDropDownOpened() => DropDownOpened?.Invoke(this);
private void Popup_Opened(object sender, EventArgs e)
{
SearchText = string.Empty;
scrollFlag = false;
DropDownOpened?.Invoke(sender, new EventArgs());
}
/// <summary>
/// Raises the <see cref="DropDownOpened"/> 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="OnDropDownOpened"/> in a derived class, be sure to call the base class's
/// <see cref="OnDropDownOpened"/> method so that registered delegates receive the event.
/// </remarks>
protected virtual void OnDropDownOpened(EventArgs eventArgs)
{
DropDownOpened?.Invoke(this, eventArgs);
}
private void RaiseDropDownOpened()
{
DropDownOpened?.Invoke(this, EventArgs.Empty);
}