private void DrawIndicators(SKCanvas canvas, float radius)
{
var threashHold = radius.Scale(0.05f);
var previousDirection = Direction;
canvas.Save();
var baseRadius = radius.Scale(0.80f);
var size = radius.Scale(0.08f);
_indicatorPath = SKPath.ParseSvgPathData($"M-{size} 0L0 {size}L{size} 0L-{size} 0Z");
_indicatorPaint.ImageFilter = SKImageFilter.CreateDropShadow(0, 1, baseRadius.Scale(0.005f), baseRadius.Scale(0.005f), SKColors.Gray);
// Top
canvas.Save();
var isForward = _position.Y > threashHold;
_indicatorPaint.Color = isForward ? IndicatorsColor.ToSKColor() : BackgroundColor.ToEngravedGradientColor(IsEnabled);
Direction = isForward ? Direction & (~JoystickDirection.None) | JoystickDirection.Forward : Direction & (~JoystickDirection.Forward);
canvas.Translate(0, baseRadius);
canvas.RotateDegrees(0);
canvas.DrawPath(_indicatorPath, _indicatorPaint);
canvas.Restore();
// Rigth
canvas.Save();
var isRigth = _position.X > threashHold;
_indicatorPaint.Color = isRigth ? IndicatorsColor.ToSKColor() : BackgroundColor.ToEngravedGradientColor(IsEnabled);
Direction = isRigth ? Direction & (~JoystickDirection.None) | JoystickDirection.Right : Direction & (~JoystickDirection.Right);
canvas.Translate(baseRadius, 0);
canvas.RotateDegrees(-90);
canvas.DrawPath(_indicatorPath, _indicatorPaint);
canvas.Restore();
// Backward
canvas.Save();
var isBackward = _position.Y < -threashHold;
_indicatorPaint.Color = isBackward ? IndicatorsColor.ToSKColor() : BackgroundColor.ToEngravedGradientColor(IsEnabled);
Direction = isBackward ? Direction & (~JoystickDirection.None) | JoystickDirection.Backward : Direction & (~JoystickDirection.Backward);
canvas.Translate(0, -baseRadius);
canvas.RotateDegrees(180);
canvas.DrawPath(_indicatorPath, _indicatorPaint);
canvas.Restore();
// Left
canvas.Save();
var isLeft = _position.X < -threashHold;
_indicatorPaint.Color = isLeft ? IndicatorsColor.ToSKColor() : BackgroundColor.ToEngravedGradientColor(IsEnabled);
Direction = isLeft ? Direction & (~JoystickDirection.None) | JoystickDirection.Left : Direction & (~JoystickDirection.Left);
canvas.Translate(-baseRadius, 0);
canvas.RotateDegrees(90);
canvas.DrawPath(_indicatorPath, _indicatorPaint);
canvas.Restore();
if (!isForward && !isBackward && !isRigth && !isLeft)
{
Direction = JoystickDirection.None;
}
if (Direction != previousDirection)
{
DigitalMoved?.Invoke(this, new EventArgs());
Execute(Command);
}
canvas.Restore();
}