public PageHeader()
{
this.InitializeComponent();
PrimaryCommands = HeaderCommandBar.PrimaryCommands;
SecondaryCommands = HeaderCommandBar.SecondaryCommands;
this.Background = HeaderCommandBar.Background;
HeaderCommandBar.SetBinding(CommandBar.BackgroundProperty, new Binding
{
Path = new PropertyPath(nameof(Background)),
Source = this
});
Action updateEllipse = () =>
{
var controls = XamlUtil.AllChildren <Control>(HeaderCommandBar);
var buttons = controls.OfType <Button>();
var button = buttons.FirstOrDefault(x => x.Name.Equals("MoreButton"));
if (button != null)
{
var count = HeaderCommandBar.PrimaryCommands.OfType <Control>().Count(x => x.Visibility.Equals(Visibility.Visible));
count += HeaderCommandBar.SecondaryCommands.OfType <Control>().Count(x => x.Visibility.Equals(Visibility.Visible));
button.Visibility = (count > 0) ? Visibility.Visible : Visibility.Collapsed;
}
};
PrimaryCommands.VectorChanged += (s, e) => updateEllipse();
HeaderCommandBar.Loaded += (s, e) => updateEllipse();
}
private void Update()
{
var controls = XamlUtil.AllChildren <Control>(commandBar);
var button = controls.OfType <Button>().FirstOrDefault(x => x.Name.Equals("MoreButton"));
if (button == null)
{
return;
}
switch (Visibility)
{
case Visibilities.Visible:
button.Visibility = global::Windows.UI.Xaml.Visibility.Visible;
break;
case Visibilities.Collapsed:
button.Visibility = global::Windows.UI.Xaml.Visibility.Collapsed;
break;
case Visibilities.Auto:
var count = commandBar.PrimaryCommands.OfType <Control>().Count(x => x.Visibility.Equals(global::Windows.UI.Xaml.Visibility.Visible));
count += commandBar.SecondaryCommands.OfType <Control>().Count(x => x.Visibility.Equals(global::Windows.UI.Xaml.Visibility.Visible));
button.Visibility = (count > 0) ? global::Windows.UI.Xaml.Visibility.Visible : global::Windows.UI.Xaml.Visibility.Collapsed;
break;
}
}
private void OnLoaded(object sender, RoutedEventArgs routedEventArgs)
{
var headers = XamlUtil.AllChildren<PivotHeaderItem>(this);
foreach (var headerItem in headers)
{
headerItem.Height = double.NaN;
}
}
private void UpdateEllipse()
{
if (_commandBar == null)
{
return;
}
var controls = XamlUtil.AllChildren <Control>(_commandBar);
var buttons = controls.OfType <Button>();
var button = buttons.FirstOrDefault(x => x.Name.Equals("MoreButton"));
if (button != null)
{
var count =
_commandBar.PrimaryCommands.OfType <Control>().Count(x => x.Visibility.Equals(Visibility.Visible));
count += _commandBar.SecondaryCommands.OfType <Control>().Count(x => x.Visibility.Equals(Visibility.Visible));
button.Visibility = (count > 0) ? Visibility.Visible : Visibility.Collapsed;
}
}
