private void RenderElements(Grid grid)
{
//First clear all existing rendered elements.
if (renderedElements.Count > 0)
{
foreach (var renderedElement in renderedElements)
{
grid.Children.Remove(renderedElement);
}
}
foreach (var valModel in UiPropertyMapping)
{
if (valModel.ValidationResult?.Count == 0)
{
continue;
}
var view = valModel.UiElement;
Entry uiElement;
try
{
uiElement = (Entry)view;
}
catch (InvalidCastException)
{
throw new Exception("Only Entry is supported for input validation.");
}
uiElement.Focused += delegate
{
MessagingCenter.Send <View>(grid, "Clear_FloatingText");
if (valModel.ValidationResult?.Count == 0)
{
return;
}
var bubble = new FloatingText(grid)
{
TranslationX = uiElement.X + uiElement.Width,
TranslationY = uiElement.Y + uiElement.Height - 4
};
bubble.FindByName <Label>("InfoText").Text = valModel.ValidationResult[0];
grid.Children.Add(bubble, 0, 0);
};
var label = new Label()
{
Text = "❗",
TextColor = Color.Red,
VerticalOptions = LayoutOptions.Start,
HorizontalOptions = LayoutOptions.Start,
TranslationX = (uiElement.X + uiElement.Width) - 20,
TranslationY = uiElement.Y + 10
};
grid.Children.Add(label, 0, 0);
renderedElements.Add(label);
}
}