public static UIView ConvertFormsToNative(this Xamarin.Forms.View view)
{
var renderer = view.GetOrCreateRenderer();
var size = new CGRect(view.X, view.Y, view.Width, view.Height);
renderer.NativeView.Frame = size;
renderer.NativeView.AutoresizingMask = UIViewAutoresizing.All;
renderer.NativeView.ContentMode = UIViewContentMode.ScaleToFill;
renderer.Element.Layout(size.ToRectangle());
var nativeView = renderer.NativeView;
nativeView.SetNeedsLayout();
return(nativeView);
}
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));
}
public void ShowContentPopup(Xamarin.Forms.View content, int width, int height, Xamarin.Forms.View parent)
{
CancelPopup();
_popup = new Popup();
_popup.IsLightDismissEnabled = true;
if (parent != null)
{
// have to turn it into the UWP visual control and extract the screen coordinates
var parentElement = parent.GetOrCreateRenderer()?.ContainerElement;
if (parentElement != null)
{
GeneralTransform transform = parentElement.TransformToVisual(null);
Windows.Foundation.Point point = transform.TransformPoint(new Windows.Foundation.Point());
_popup.HorizontalOffset = point.X;
_popup.VerticalOffset = point.Y;
}
}
var border = new Border
{
HorizontalAlignment = HorizontalAlignment.Stretch,
VerticalAlignment = VerticalAlignment.Stretch,
BorderBrush = new SolidColorBrush(Colors.Black),
BorderThickness = new Windows.UI.Xaml.Thickness(1)
};
Grid.SetColumnSpan(border, 3);
Grid.SetRowSpan(border, 3);
var visualElement = content.GetOrCreateRenderer().ContainerElement;
Grid.SetColumn(visualElement, 1);
Grid.SetRow(visualElement, 1);
float spacing = 8f;
var grid = new Windows.UI.Xaml.Controls.Grid
{
HorizontalAlignment = HorizontalAlignment.Stretch,
VerticalAlignment = VerticalAlignment.Stretch,
Background = new SolidColorBrush(Colors.White),
RowSpacing = 4,
RowDefinitions =
{
new Windows.UI.Xaml.Controls.RowDefinition {
Height = new Windows.UI.Xaml.GridLength(spacing)
},
new Windows.UI.Xaml.Controls.RowDefinition {
Height = new Windows.UI.Xaml.GridLength(height)
},
new Windows.UI.Xaml.Controls.RowDefinition {
Height = new Windows.UI.Xaml.GridLength(spacing)
},
},
ColumnDefinitions =
{
new Windows.UI.Xaml.Controls.ColumnDefinition {
Width = new Windows.UI.Xaml.GridLength(spacing)
},
new Windows.UI.Xaml.Controls.ColumnDefinition {
Width = new Windows.UI.Xaml.GridLength(width)
},
new Windows.UI.Xaml.Controls.ColumnDefinition {
Width = new Windows.UI.Xaml.GridLength(spacing)
},
},
Children =
{
border,
visualElement
}
};
grid.SizeChanged += delegate
{
// this is done in case the popup window show's outside the bounds of the main window
var window = ApplicationView.GetForCurrentView();
if (_popup.HorizontalOffset + grid.ActualWidth > window.VisibleBounds.Width)
{
_popup.HorizontalOffset = window.VisibleBounds.Width - grid.ActualWidth - 10;
}
};
_popup.Child = grid;
_popup.IsOpen = true;
}
