/// <summary>
/// Shows the context menu in the preferred placement relative to the specified selection.
/// </summary>
/// <param name="selection">The coordinates (in DIPs) of the selected rectangle, relative to the window.</param>
/// <param name="preferredPlacement">The preferred placement of the context menu relative to the selection rectangle.</param>
/// <returns></returns>
public Task<IUICommand> ShowForSelectionAsync(Rect selection, Placement preferredPlacement)
{
if (Commands.Count > MaxCommands)
{
throw new InvalidOperationException();
}
#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.Rect r = new Windows.Foundation.Rect(selection.X, selection.Y, selection.Width, selection.Height);
var c = await _menu.ShowForSelectionAsync(r, (Windows.UI.Popups.Placement)((int)preferredPlacement));
return c == null ? null : new UICommand(c.Label, new UICommandInvokedHandler((c2) => { c2.Invoked?.Invoke(c2); }), c.Id);
});
#elif __ANDROID__
Android.App.AlertDialog.Builder builder = new Android.App.AlertDialog.Builder(Plugin.CurrentActivity.CrossCurrentActivity.Current.Activity);
Android.App.AlertDialog dialog = builder.Create();
dialog.SetTitle(Title);
dialog.SetMessage(Content);
if (Commands.Count == 0)
{
dialog.SetButton(-1, Resources.System.GetString(Android.Resource.String.Cancel), new EventHandler<Android.Content.DialogClickEventArgs>(Clicked));
}
else
{
for (int i = 0; i < Commands.Count; i++)
{
dialog.SetButton(-1 - i, Commands[i].Label, new EventHandler<Android.Content.DialogClickEventArgs>(Clicked));
}
}
dialog.Show();
return Task.Run<IUICommand>(() =>
{
handle.WaitOne();
return _selectedCommand;
});
#elif __IOS__
uac = UIAlertController.Create("", "", UIAlertControllerStyle.ActionSheet);
if (Commands.Count == 0)
{
uac.AddAction(UIAlertAction.Create("Cancel", UIAlertActionStyle.Cancel | UIAlertActionStyle.Default, ActionClicked));
}
else
{
for (int i = 0; i < Commands.Count; i++)
{
UIAlertAction action = UIAlertAction.Create(Commands[i].Label, UIAlertActionStyle.Default, ActionClicked);
uac.AddAction(action);
}
}
UIViewController currentController = UIApplication.SharedApplication.KeyWindow.RootViewController;
while (currentController.PresentedViewController != null)
currentController = currentController.PresentedViewController;
// set layout requirements for iPad
var popoverController = uac.PopoverPresentationController;
if(popoverController != null)
{
popoverController.SourceView = currentController.View;
popoverController.SourceRect = new CoreGraphics.CGRect(selection.X, selection.Y, selection.Width, selection.Height);
popoverController.PermittedArrowDirections = PlacementHelper.ToArrowDirection(preferredPlacement);
}
currentController.PresentViewController(uac, true, null);
return Task.Run<IUICommand>(() =>
{
handle.WaitOne();
return _selectedCommand;
});
#else
throw new PlatformNotSupportedException();
#endif
}
/// <summary>
/// Shows the context menu by the specified selection.
/// </summary>
/// <param name="selection">The coordinates (in DIPs) of the selected rectangle, relative to the window.</param>
/// <returns></returns>
public Task<IUICommand> ShowForSelectionAsync(Rect selection)
{
#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.Rect r = new Windows.Foundation.Rect(selection.X, selection.Y, selection.Width, selection.Height);
var c = await _menu.ShowForSelectionAsync(r);
return c == null ? null : new UICommand(c.Label, new UICommandInvokedHandler((c2) => { c2.Invoked?.Invoke(c2); }), c.Id);
});
#else
return ShowForSelectionAsync(selection, Placement.Default);
#endif
}