public HostFlyoutPanelToolForm(Control owner, FlyoutPanel flyoutPanel, FlyoutPanelOptions options, Control hostControl, FlyoutControl flyoutControl)
     : base(owner, flyoutPanel, options)
 {
     handler.HostControl   = hostControl;    //CreateHandler方法在基类的构造函数中进行了调用,因此,这个地方的handler已经创建
     handler.FlyoutControl = flyoutControl;
 }
 public HostPopupToolWindowUpDownSlideAnimationProvider(IPopupToolWindowAnimationSupports info, Control hostControl, FlyoutControl flyoutControl)
     : base(info)
 {
     this.hostControl   = hostControl;
     this.flyoutControl = flyoutControl;
 }