protected override void OnElementChanged(ElementChangedEventArgs<Image> e)
{
base.OnElementChanged(e);
if (_formsControl != null)
{
var svgStream = _formsControl.SvgAssembly.GetManifestResourceStream(_formsControl.SvgPath);
if (svgStream == null)
{
throw new Exception(string.Format("Error retrieving {0} make sure Build Action is Embedded Resource",
_formsControl.SvgPath));
}
var r = new SvgReader(new StreamReader(svgStream), new StylesParser(new ValuesParser()), new ValuesParser());
var graphics = r.Graphic;
var width = _formsControl.WidthRequest <= 0 ? 100 : _formsControl.WidthRequest;
var height = _formsControl.HeightRequest <= 0 ? 100 : _formsControl.HeightRequest;
var scale = 1.0;
if (height >= width)
{
scale = height/graphics.Size.Height;
}
else
{
scale = width/graphics.Size.Width;
}
var scaleFactor = UIScreen.MainScreen.Scale;
var canvas = new ApplePlatform().CreateImageCanvas(graphics.Size, scale*scaleFactor);
graphics.Draw(canvas);
var image = canvas.GetImage();
var uiImage = image.GetUIImage();
Control.Image = uiImage;
}
}
public TextMetrics MeasureText(string text, Font font)
{
return(ApplePlatform.GlobalMeasureText(text, font));
}
private async void GenerateImage(object sender, EventArgs e)
{
_avatar.AvatarInitial = "C";
_avatar.FillColor = Color.Blue;
/*
*
01 - #71cfbf
02 - #e3a685
03 - #7eaae5
04 - #ca7c7a
05 - #bc789b
06 - #dd8785
*/
var colours = new List<string>()
{
"#71cfbf","#e3a685", "#7eaae5", "#ca7c7a", "#bc789b", "#dd8785"
};
// (NGraphics.IImageCanvas)
double canvasSize = 96;
double textSize = canvasSize / 2;
var canvasx = new ApplePlatform().CreateImageCanvas(new Size(canvasSize), 2);
//canvasx.FillEllipse(rect, new RadialGradientBrush(new NGraphics.Color("#0000ff"), new NGraphics.Color("#ff0000")));
//canvasx.DrawRectangle(rect, new Pen("#9966CC", 5D), new SolidBrush(NGraphics.Color.FromRGB(0)));
var rect = new Rect(new Size(canvasSize));
var initials = new string[]
{
"A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R",
"S", "T", "U", "V", "W", "X", "Y", "Z"
};
foreach(var colourString in colours)
{
var backColour = new NGraphics.Color(colourString);
canvasx.DrawRectangle(rect, new Pen(backColour), new SolidBrush(backColour));
double penWidth = 1D;
var innerBox = new Rect(new Point(rect.Center.X - textSize / 2, rect.Center.Y - textSize / 2), new Size(textSize));
// DEBUG only to see where the text appears within the parent container for centering purposes
//canvasx.DrawRectangle(innerBox, new Pen(Colors.LightGray));
// bug in NGraphics on ios draws text ABOVE the rectangle you specify
var textRec = new Rect(new Point(innerBox.Left + penWidth, innerBox.Top + innerBox.Height - penWidth - (textSize * 0.1)), new Size(textSize));
var font = new Font("Metric-Regular", textSize);
canvasx.DrawText("W", textRec, font, TextAlignment.Center, Pens.White, Brushes.White);
//canvasx.DrawText("W", rect.Center, new Font(), new NGraphics.Color("#9966cc") );
string fileName = System.IO.Path.Combine(_dataPath, string.Format("{0:dd-MM-yyyy-HH-mm-ss}.png", DateTime.Now));
canvasx.GetImage().SaveAsPng(fileName);
LogHost.Default.Debug(string.Format("image saved to {0}", fileName));
_drawnImage.Source = ImageSource.FromFile(fileName);
// var s = colourString;
// await MainPage.DisplayAlert("Done", string.Format("Done with {0}", s), "OK");
}
Device.BeginInvokeOnMainThread(async () => await this.DisplayAlert("All Done", "All Done", "OK"));
}
