private void InitDirection(StackLayout radio, Label radioText, SelectionFrame radioCircle)
{
if (Direction == Directions.RTL)
{
radioText.HorizontalOptions = LayoutOptions.EndAndExpand;
radioCircle.HorizontalOptions = LayoutOptions.StartAndExpand;
radio.Children.Add(radioCircle);
radio.Children.Add(radioText);
}
else
{
radioCircle.HorizontalOptions = LayoutOptions.EndAndExpand;
radio.Children.Add(radioText);
radio.Children.Add(radioCircle);
}
parentStack.Children.Add(radio);
}
private void RebuildOnItemsSource()
{
if (parentStack.Children.Count > 0)
{
return;
}
parentStack.Orientation = Orientation;
parentStack.HorizontalOptions = Orientation == StackOrientation.Vertical ? LayoutOptions.Center : HorizontalOptions;
parentStack.VerticalOptions = VerticalOptions;
var items = ItemsSource;
if (Orientation == StackOrientation.Horizontal && Direction == Directions.RTL)
{
items = items.Reverse();
}
foreach (var item in items)
{
StackLayout radio = new StackLayout
{
Orientation = StackOrientation.Horizontal,
BindingContext = item,
HorizontalOptions = Orientation == StackOrientation.Horizontal ? LayoutOptions.CenterAndExpand : LayoutOptions.Fill,
};
TapGestureRecognizer tap = new TapGestureRecognizer();
tap.Tapped += RadioChecked;
radio.GestureRecognizers.Add(tap);
var displayText = DisplayMemberPath == null?item.ToString() : item.GetType().GetProperty(DisplayMemberPath).GetValue(item, null).ToString();
Label radioText = new Label
{
Text = displayText,
VerticalOptions = LayoutOptions.Center,
TextColor = FrontColor,
FontAttributes = FontAttributes,
FontSize = FontSize,
FontFamily = FontFamily
};
SelectionFrame circle = new SelectionFrame {
ClassId = "r", BorderColor = FrontColor, VerticalOptions = LayoutOptions.Center
};
InitDirection(radio, radioText, circle);
}
lbRadios = parentStack.Children.Where(x => x is StackLayout).SelectMany(x => ((StackLayout)x).Children.Where(l => l.ClassId == "r").Cast <SelectionFrame>()).ToList();
if (Orientation == StackOrientation.Horizontal && Direction == Directions.RTL)
{
lbRadios.Reverse();
}
if (SelectedIndex >= 0)
{
try
{
lbRadios[SelectedIndex].IsSelected = true;
}
catch (ArgumentOutOfRangeException)
{
SetValue(SelectedIndexProperty, 0);
lbRadios[SelectedIndex].IsSelected = true;
}
}
}