public BoxGradient()
{
BackgroundColor = myBackgroundColor.ToFormsColor();
Color1 = Color.Blue;
Color2 = Color.Blue;
CircleStrokeWidth = 40;
}
public ChartControl()
{
BackgroundColor = myBackgroundColor.ToFormsColor();
myColorAxis = SKColors.DarkGray;
myColorText = SKColors.Black;
myColorLine = SKColors.Red;
myColorTitle = SKColors.IndianRed;
}
async void OnSelected(object sender, EventArgs e)
{
if (_colorChanged)
{
ColorChanged?.Invoke(this, new ColorChangedEventArgs(_selectedColor.ToFormsColor()));
_colorChanged = false;
}
if (this.Parent.FindByName("WheelPickerButton") is Button btn)
{
btn.IsEnabled = true;
}
await Navigation.PopPopupAsync();
}
public static async Task <Xamarin.Forms.Color> CalculateBackgroundColorAsync(Speaker speaker)
{
try
{
var localFolder = Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData);
var cachedFilePath = Path.Combine(localFolder, $"{speaker.Id}.png");
// Cache the file now so that any future requests for the same speaker doesn't need to redownload it
if (!File.Exists(cachedFilePath))
{
using (Stream stream = await new HttpClient().GetStreamAsync(speaker.ImageUrl))
using (var fileStream = File.OpenWrite(cachedFilePath))
{
await stream.CopyToAsync(fileStream);
}
}
//
using (var fileStream = File.OpenRead(cachedFilePath))
using (MemoryStream memStream = new MemoryStream())
{
// load stream into SKBitmap
await fileStream.CopyToAsync(memStream);
memStream.Seek(0, SeekOrigin.Begin);
var bitmap = SKBitmap.Decode(memStream);
// create a dictionary to keep track of the color that is used the most
var colors = new Dictionary <SKColor, int>();
for (int x = 0; x < bitmap.Width; x++)
{
for (int y = 0; y < bitmap.Height; y++)
{
// get the pixel
SKColor color = bitmap.GetPixel(x, y);
if (colors.ContainsKey(color))
{
// Found the same color again, bump it
colors[color]++;
}
else
{
// new color found, give it its own entry
colors.Add(color, 1);
}
}
}
// Use LINQ to find the most prevenlent color
SKColor mostCommonColor = colors.Aggregate((left, right) => left.Value > right.Value ? left : right).Key;
// Convert it for use in Xamarin.Forms
return(mostCommonColor.ToFormsColor());
};
}
catch (Exception ex)
{
Crashes.TrackError(ex, new Dictionary <string, string>
{
{ "Location", "Helpers" },
{ "Method", "CalculateBackgroundColorAsync" },
{ "Speaker", speaker.Name }
});
return(Xamarin.Forms.Color.FromHex("#AA000000"));
}
}
private void InitialiseBrushSetup()
{
brushThickness = (int)((int)BrushThickness.Small * brushRatio);
ResetBrushButtons();
brushSmall.BorderColor = brushColourToBeUsed.ToFormsColor();
}
