protected override void OnElementChanged(ElementChangedEventArgs <Controls.Button> e)
{
base.OnElementChanged(e);
if (e.OldElement == null)
{
AButton button = Control;
if (button == null)
{
button = CreateNativeControl();
button.SetOnClickListener(ButtonClickListener.Instance.Value);
button.SetOnTouchListener(ButtonTouchListener.Instance.Value);
button.Tag = this;
SetNativeControl(button);
button.Focusable = false;
button.FocusableInTouchMode = false;
_textColorSwitcher = new TextColorSwitcher(button.TextColors);
button.AddOnAttachStateChangeListener(this);
}
}
else
{
if (_drawableEnabled)
{
_drawableEnabled = false;
_backgroundDrawable.Reset();
_backgroundDrawable = null;
}
}
UpdateAll();
}
protected override void Dispose(bool disposing)
{
if (_isDisposed)
{
return;
}
_isDisposed = true;
if (disposing)
{
if (_backgroundDrawable != null)
{
_backgroundDrawable.Dispose();
_backgroundDrawable = null;
}
}
base.Dispose(disposing);
}
void UpdateDrawable()
{
if (Element.BackgroundColor == Xamarin.Forms.Color.Default)
{
if (!_drawableEnabled)
{
return;
}
if (_defaultDrawable != null)
{
Control.SetBackground(_defaultDrawable);
}
_drawableEnabled = false;
}
else
{
if (_backgroundDrawable == null)
{
_backgroundDrawable = new ButtonDrawable(Context.ToPixels);
}
_backgroundDrawable.Button = Element;
if (_drawableEnabled)
{
return;
}
if (_defaultDrawable == null)
{
_defaultDrawable = Control.Background;
}
Control.SetBackground(_backgroundDrawable);
_drawableEnabled = true;
}
Control.Invalidate();
}
