protected override void OnVisibleChanged(EventArgs e)
{
base.OnVisibleChanged(e);
if ((Visible && PopupAnimation == PopupAnimations.None) || (!Visible && CloseAnimation == PopupAnimations.None))
{
return;
}
AnimationFlags flags = Visible ? AnimationFlags.Roll : AnimationFlags.Hide;
PopupAnimations _flags = Visible ? PopupAnimation : CloseAnimation;
if (_flags == PopupAnimations.SystemDefault)
{
if (SystemInformation.IsMenuAnimationEnabled)
{
if (SystemInformation.IsMenuFadeEnabled)
{
_flags = PopupAnimations.Blend;
}
else
{
_flags = PopupAnimations.Slide | (Visible ? PopupAnimations.TopToBottom : PopupAnimations.BottomToTop);
}
}
else
{
_flags = PopupAnimations.None;
}
}
if ((_flags & (PopupAnimations.Blend | PopupAnimations.Center | PopupAnimations.Roll | PopupAnimations.Slide)) == PopupAnimations.None)
{
return;
}
if (_resizableTop) // popup is “inverted”, so the animation must be
{
if ((_flags & PopupAnimations.BottomToTop) != PopupAnimations.None)
{
_flags = (_flags & ~PopupAnimations.BottomToTop) | PopupAnimations.TopToBottom;
}
else if ((_flags & PopupAnimations.TopToBottom) != PopupAnimations.None)
{
_flags = (_flags & ~PopupAnimations.TopToBottom) | PopupAnimations.BottomToTop;
}
}
if (_resizableLeft) // popup is “inverted”, so the animation must be
{
if ((_flags & PopupAnimations.RightToLeft) != PopupAnimations.None)
{
_flags = (_flags & ~PopupAnimations.RightToLeft) | PopupAnimations.LeftToRight;
}
else if ((_flags & PopupAnimations.LeftToRight) != PopupAnimations.None)
{
_flags = (_flags & ~PopupAnimations.LeftToRight) | PopupAnimations.RightToLeft;
}
}
flags |= (AnimationFlags.Mask & (AnimationFlags)(int)_flags);
NativeUtility.AnimateWindow(this, AnimationDuration, flags);
}