public static void UpdateFromFormsControl (this UILabel uiLabel, string text, TextAlignment textAlignment, Color textColor, Font font)
{
uiLabel.Text = text;
uiLabel.TextAlignment = textAlignment.ToUITextAlignment ();
uiLabel.TextColor = textColor.ToUIColor ();
uiLabel.Font = font.ToUIFont ();
}
public static UIColor ToUIColor(this Color color, UIColor defaultColor)
{
if (color.IsDefault)
return defaultColor;
return color.ToUIColor();
}
/// <summary>
/// Converts the UIColor to a Xamarin Color object.
/// </summary>
/// <param name="color">The color.</param>
/// <param name="defaultColor">The default color.</param>
/// <returns>UIColor.</returns>
public static UIColor ToUIColorOrDefault(this Xamarin.Forms.Color color, UIColor defaultColor)
{
if (color == Xamarin.Forms.Color.Default)
{
return(defaultColor);
}
return(color.ToUIColor());
}
protected override void SetBackgroundColor(Xamarin.Forms.Color color)
{
if (color == Xamarin.Forms.Color.Default)
{
BackgroundColor = UIColor.Clear;
}
else
{
BackgroundColor = color.ToUIColor();
}
}
/// <summary>
/// Adds the text.
/// </summary>
/// <param name="source">The source.</param>
/// <param name="text">The text.</param>
/// <param name="point">The point.</param>
/// <param name="font">The font.</param>
/// <param name="color">The color.</param>
/// <returns>Task<ImageSource>.</returns>
public static async Task<ImageSource> AddText(
this StreamImageSource source,
string text,
CGPoint point,
Font font,
Color color)
{
var token = new CancellationTokenSource();
var stream = await source.Stream(token.Token);
var image = UIImage.LoadFromData(NSData.FromStream(stream));
var bytes = image.AddText(text, point, font.ToUIFont(), color.ToUIColor()).AsPNG().ToArray();
return ImageSource.FromStream(() => new MemoryStream(bytes));
}
void SetOverlay(Color color)
{
var formsImage = (Xamarin.Forms.Image)Element;
if (formsImage?.Source == null || formsImage?.IsLoading == true)
{
return;
}
if (Control is UIImageView imageView && imageView.Image != null)
{
originalRenderingMode = imageView.Image.RenderingMode;
originalTintColor = imageView.TintColor;
imageView.Image = imageView.Image.ImageWithRenderingMode(UIImageRenderingMode.AlwaysTemplate);
imageView.TintColor = color.ToUIColor();
}
}
protected override void SetBackgroundColor(Xamarin.Forms.Color color)
{
if (Element == null)
{
return;
}
var elementColor = Element.BackgroundColor;
if (!elementColor.IsDefault)
{
_colorToRender = elementColor.ToUIColor();
}
else
{
_colorToRender = color.ToUIColor();
}
SetNeedsDisplay();
}
public static void UpdateFromFormsControl (this UILabel uiLabel, string text, Xamarin.Forms.TextAlignment textAlignment, Color textColor, Font font)
{
uiLabel.Text = text;
switch (textAlignment) {
case TextAlignment.Start:
uiLabel.TextAlignment = UITextAlignment.Left;
break;
case TextAlignment.Center:
uiLabel.TextAlignment = UITextAlignment.Center;
break;
case TextAlignment.End:
uiLabel.TextAlignment = UITextAlignment.Right;
break;
}
uiLabel.TextColor = textColor.ToUIColor ();
uiLabel.Font = font.ToUIFont ();
}
void SetOverlay(Xamarin.Forms.Color color)
{
var formsImage = (Xamarin.Forms.Image)Element;
if (formsImage?.Source == null)
{
return;
}
try
{
UIImage image = ((UIImageView)Control).Image;
UIImage coloredImage = null;
UIGraphics.BeginImageContextWithOptions(image.Size, false, 0.0f);
using (CGContext context = UIGraphics.GetCurrentContext())
{
context.TranslateCTM(0, image.Size.Height);
context.ScaleCTM(1.0f, -1.0f);
//var rect = new RectangleF(0, 0, (float)(image.Size.Width * image.CurrentScale), (float)(image.Size.Height * image.CurrentScale));
var rect = new RectangleF(0, 0, (float)(image.Size.Width), (float)(image.Size.Height));
// draw image, (to get transparancy mask)
context.SetBlendMode(CGBlendMode.Normal);
context.DrawImage(rect, image.CGImage);
// draw the color using the sourcein blend mode so its only draw on the non-transparent pixels
context.SetBlendMode(CGBlendMode.SourceIn);
context.SetFillColor(color.ToUIColor().CGColor);
context.FillRect(rect);
coloredImage = UIGraphics.GetImageFromCurrentImageContext();
UIGraphics.EndImageContext();
}
((UIImageView)Control).Image = coloredImage;
}
catch (ObjectDisposedException)
{
return;
}
}
protected override void OnAttached()
{
/*
* Text Color change when I select a value
*/
_color = (Color)Element.GetValue(RoutingEffects.PickerChangeColor.ColorProperty);
(Control as UITextField).AttributedPlaceholder = new Foundation.NSAttributedString((Control as UITextField).AttributedPlaceholder.Value, foregroundColor: _color.ToUIColor());
}
public static CGColor ToCGColor(this Color color)
{
return color.ToUIColor().CGColor;
}
protected override void OnAttached()
{
(Control as UISwitch).OnTintColor = xfMainColor.ToUIColor();
}
