private void DrawSKCanvasView_PaintSurface(object sender, SKPaintSurfaceEventArgs e)
{
SkiaSharpHelper.Draw(drawType, pageVM.IsClear, e);
}
private void OnTouch
(object sender, TouchTracking.TouchActionEventArgs args)
{
// Convert touch point to pixel point
_touch.Current = SkiaSharpHelper.ToPixel(args.Location.X, args.Location.Y, ref thumbsCanvas);
// Check bounds
if (_touch.Current.X < _thumbsCanvasInfo.ImageInfo.Rect.Left ||
_touch.Current.X > _thumbsCanvasInfo.ImageInfo.Rect.Right)
{
return;
}
// Check touch type
switch (args.Type)
{
case TouchActionType.Pressed:
_touch.Matrix = SKMatrix.MakeIdentity();
// Adjust thumbs bounds
_leftThumbDraw.Bounds = new SKRect
(_leftThumbDraw.Point.X - _leftThumbDraw.Radius, _leftThumbDraw.Point.Y - _leftThumbDraw.Radius
, _leftThumbDraw.Point.X + _leftThumbDraw.Radius, _leftThumbDraw.Point.Y + _leftThumbDraw.Radius);
_rightThumbDraw.Bounds = new SKRect
(_rightThumbDraw.Point.X - _rightThumbDraw.Radius, _rightThumbDraw.Point.Y - _rightThumbDraw.Radius
, _rightThumbDraw.Point.X + _rightThumbDraw.Radius, _rightThumbDraw.Point.Y + _rightThumbDraw.Radius);
// Check if the inner circle was touched
if (_leftThumbDraw.Bounds.Contains(_touch.Current) &&
_rightThumbDraw.Bounds.Contains(_touch.Current))
{
_touch.Id = args.Id;
_touch.Previous = _touch.Current;
_activeThumb = _lastActiveThumb;
}
else if (_leftThumbDraw.Bounds.Contains(_touch.Current))
{
_touch.Id = args.Id;
_touch.Previous = _touch.Current;
_activeThumb = ActiveThumb.Left;
}
else if (_rightThumbDraw.Bounds.Contains(_touch.Current))
{
_touch.Id = args.Id;
_touch.Previous = _touch.Current;
_activeThumb = ActiveThumb.Right;
}
break;
case TouchActionType.Moved:
if (_touch.Id == args.Id)
{
// Adjust the matrix for the new position
_touch.Matrix.TransX += _touch.Current.X - _touch.Previous.X;
_touch.Matrix.TransY += _touch.Current.Y - _touch.Previous.Y;
_touch.Previous = _touch.Current;
var value = GetThumbValue(_touch.Current);
// Check active thumb
if (_activeThumb == ActiveThumb.Left)
{
Thumbs.Left.Value = value;
Start = value;
}
else if (_activeThumb == ActiveThumb.Right)
{
Thumbs.Right.Value = value;
End = value;
}
// Update value
thumbsCanvas.InvalidateSurface();
}
break;
case TouchActionType.Released:
case TouchActionType.Cancelled:
{
_touch.Id = -1;
_lastActiveThumb = _activeThumb;
}
break;
}
}
private void DrawSKCanvasView_PaintSurface(object sender, SKPaintSurfaceEventArgs e)
{
SkiaSharpHelper.Draw(DrawType.CircleAnimation, false, e, scale);
}
private void InitializePaints()
{
// Left thumb
_leftThumbDraw.Paint = new SKPaint
{
Color = SKColors.White,
IsAntialias = true
};
_leftThumbDraw.ValueTextDraw.Paint = new SKPaint
{
Color = SKColors.Black,
IsAntialias = true,
};
_leftThumbDraw.IconTextDraw.Paint = new SKPaint
{
Color = SKColors.White,
IsAntialias = true,
Typeface = SkiaSharpHelper.LoadTtfFont(Fonts.Icons)
};
// Right thumb
_rightThumbDraw.Paint = new SKPaint
{
Color = SKColors.White,
IsAntialias = true
};
_rightThumbDraw.ValueTextDraw.Paint = new SKPaint
{
Color = SKColors.Black,
IsAntialias = true
};
_rightThumbDraw.IconTextDraw.Paint = new SKPaint
{
Color = SKColors.White,
IsAntialias = true,
Typeface = SkiaSharpHelper.LoadTtfFont(Fonts.Icons)
};
// Thumbs shadow
_leftThumbDraw.Paint.ImageFilter = _rightThumbDraw.Paint.ImageFilter = SKImageFilter.CreateDropShadow(
0,
0,
5,
5,
SKColor.Parse("#EFEFEF"),
SKDropShadowImageFilterShadowMode.DrawShadowAndForeground
);
// Value segment
_valueSegmentPaint = new SKPaint
{
Color = SKColors.Black,
IsAntialias = true,
};
// Remaining value segment
_remainingValueSegmentPaint = new SKPaint
{
Color = SKColors.Gray,
IsAntialias = true,
};
}
