/// <summary>
/// Open the <see cref="MenuItems"/> menu items.
/// </summary>
public void Show()
{
if (menuBar != null)
{
Hide();
}
container = Application.Current;
container.Closing += Container_Closing;
container.Resized += Container_Resized;
var frame = container.Frame;
var position = Position;
if (Host != null)
{
Host.ViewToScreen(container.Frame.X, container.Frame.Y, out int x, out int y);
var pos = new Point(x, y);
pos.Y += Host.Frame.Height - 1;
if (position != pos)
{
Position = position = pos;
}
}
var rect = Menu.MakeFrame(position.X, position.Y, MenuItems.Children);
if (rect.Right >= frame.Right)
{
if (frame.Right - rect.Width >= 0 || !ForceMinimumPosToZero)
{
position.X = frame.Right - rect.Width;
}
else if (ForceMinimumPosToZero)
{
position.X = 0;
}
}
else if (ForceMinimumPosToZero && position.X < 0)
{
position.X = 0;
}
if (rect.Bottom >= frame.Bottom)
{
if (frame.Bottom - rect.Height - 1 >= 0 || !ForceMinimumPosToZero)
{
if (Host == null)
{
position.Y = frame.Bottom - rect.Height - 1;
}
else
{
Host.ViewToScreen(container.Frame.X, container.Frame.Y, out int x, out int y);
var pos = new Point(x, y);
position.Y = pos.Y - rect.Height - 1;
}
}
else if (ForceMinimumPosToZero)
{
position.Y = 0;
}
}
else if (ForceMinimumPosToZero && position.Y < 0)
{
position.Y = 0;
}
menuBar = new MenuBar(new [] { MenuItems })
{
X = position.X,
Y = position.Y,
Width = 0,
Height = 0,
UseSubMenusSingleFrame = UseSubMenusSingleFrame
};
menuBar.isContextMenuLoading = true;
menuBar.MenuAllClosed += MenuBar_MenuAllClosed;
IsShow = true;
menuBar.OpenMenu();
}