| public static SetRow ( [ element, [ value ) : void | ||
| element | [ | |
| value | [ | |
| return | void | |
private const string BadgeValueOverflow = "*"; // text to display if the number is greater than 99
/// <summary>
/// Adds badge with text on app bar button
/// </summary>
/// <param name="appBarButton">App bar button to add badge</param>
/// <param name="item">Toolbar item</param>
/// <param name="value">Value to display</param>
/// <param name="backgroundColor">bBackground of badge</param>
/// <param name="textColor">Foreground text color of value</param>
public static void AddBadge(this AppBarButton appBarButton, ToolbarItem item, string value, Color backgroundColor, Color textColor)
{
if (item.IconImageSource == null)
{
return; // if icon is not specified in toolbar item return
}
var img = new Xamarin.Forms.Image {
Source = item.IconImageSource
}; // create new image with image source specified in toolbar item
var imagePlatform = Platform.CreateRenderer(img) as ImageRenderer; // get platform renderer for image
var grid = new Grid(); // create new UWP grid
var image = new Image {
Source = imagePlatform?.Control.Source, Stretch = Stretch.Fill, HorizontalAlignment = HorizontalAlignment.Stretch, VerticalAlignment = VerticalAlignment.Stretch
}; // create new UWP Image, and set the source to toolbar item's image source
Grid.SetColumn(image, 0); // get row for image control in grid
Grid.SetRow(image, 0); // get column for image control in grid
grid.Children.Add(image); // add image to grid
if (!string.IsNullOrWhiteSpace(value) && value != "0") // check if value is set and value not equal to 0
{
var border = new Border // create new UWP border
{
Margin = new Windows.UI.Xaml.Thickness(10, 0, 0, 10), // add margins
Background = new SolidColorBrush(backgroundColor.ToWindowsColor()), // set background color
CornerRadius = new Windows.UI.Xaml.CornerRadius(13), // make border as circle
Child = new TextBlock // create a UWP TextBlock
{
Text = value.Length > 2 ? BadgeValueOverflow : value, // set text, if value length is greater than 2, replace value with *
HorizontalAlignment = HorizontalAlignment.Center, // align control center horizontally
VerticalAlignment = VerticalAlignment.Center, // align control center Vertically
HorizontalTextAlignment = Windows.UI.Xaml.TextAlignment.Center, // text alignment to center
Foreground = new SolidColorBrush(textColor.ToWindowsColor()) // set fore color
}
};
Grid.SetColumn(border, 0); // get row for border control in grid
Grid.SetRow(border, 0); // get column for border control in grid
grid.Children.Add(border); // add image to grid
}
appBarButton.Content = grid; // replace UWP toolbar item content with newly created grid
}
