/// <summary>
/// Creates a button that when clicked displays a flyout with the specified <paramref name="links"/>.
/// Clicking on a link opens a web browser on that page.
/// </summary>
/// <param name="links"></param>
/// <returns></returns>
internal static Windows.UI.Xaml.Controls.Button CreateLinksAppBarButton(Dictionary <string, Uri> links)
{
var popup = new Windows.UI.Popups.PopupMenu();
Windows.UI.Popups.UICommandInvokedHandler popupHandler = async(Windows.UI.Popups.IUICommand command) =>
{
await Windows.System.Launcher.LaunchUriAsync(links[command.Label]);
};
foreach (var item in links)
{
popup.Commands.Add(new Windows.UI.Popups.UICommand(item.Key, popupHandler));
}
var button = new Windows.UI.Xaml.Controls.Button
{
Style = App.Current.Resources["LinksAppBarButtonStyle"] as Windows.UI.Xaml.Style
};
button.Click += async(object sender, Windows.UI.Xaml.RoutedEventArgs e) =>
{
var btnSender = sender as Windows.UI.Xaml.Controls.Button;
var transform = btnSender.TransformToVisual(Windows.UI.Xaml.Window.Current.Content) as Windows.UI.Xaml.Media.MatrixTransform;
var point = transform.TransformPoint(new Windows.Foundation.Point());
await popup.ShowAsync(point);
};
return(button);
}
/// <summary>
/// Shows the context menu at the specified client coordinates.
/// </summary>
/// <param name="invocationPoint">The coordinates (in DIPs), relative to the window, of the user's finger or mouse pointer when the oncontextmenu event fired.
/// The menu is placed above and centered on this point.</param>
/// <returns>An object that represents the asynchronous operation.
/// For more on the async pattern, see Asynchronous programming in the Windows Runtime.</returns>
public Task <IUICommand> ShowAsync(Point invocationPoint)
{
#if WINDOWS_UWP
return(Task.Run <IUICommand>(async() =>
{
foreach (IUICommand command in Commands)
{
_menu.Commands.Add(new Windows.UI.Popups.UICommand(command.Label, new Windows.UI.Popups.UICommandInvokedHandler((c2) => { command.Invoked?.Invoke(command); }), command.Id));
}
Windows.Foundation.Point p = new Windows.Foundation.Point(invocationPoint.X, invocationPoint.Y);
var c = await _menu.ShowAsync(p);
return c == null ? null : new UICommand(c.Label, new UICommandInvokedHandler((c2) => { c2.Invoked?.Invoke(c2); }), c.Id);
}));
#else
return(ShowForSelectionAsync(new Rect(invocationPoint.X, invocationPoint.Y, 0, 0), Placement.Default));
#endif
}
public async Task <int> LaunchMenu(List <string> menuItems, Xamarin.Forms.View parent)
{
if (menuItems == null || menuItems.Count == 0)
{
return(-1);
}
var menu = new Windows.UI.Popups.PopupMenu();
Windows.Foundation.Point point = new Windows.Foundation.Point(0, 0);
if (parent != null)
{
// have to turn it into the UWP visual control and extract the screen coordinates
var visualElement = parent.GetOrCreateRenderer()?.ContainerElement;
if (visualElement != null)
{
GeneralTransform transform = visualElement.TransformToVisual(null);
point = transform.TransformPoint(new Windows.Foundation.Point());
}
}
for (var i = 0; i < menuItems.Count; i++)
{
var item = menuItems[i];
menu.Commands.Add(new Windows.UI.Popups.UICommand(item));
}
var response = await menu.ShowAsync(point);
if (response == null || string.IsNullOrEmpty(response.Label))
{
return(-1);
}
return(menuItems.IndexOf(response.Label));
}
private void chartOptions(object sender, RoutedEventArgs e)
{
var popup = new Windows.UI.Popups.PopupMenu();
popup.ShowAsync(new Point(0, 0));
}
