private void OnTouch(object sender, SKTouchEventArgs e)
{
SKPoint absoluteTouchLocation = new SKPoint((int)Math.Floor(e.Location.X), (int)Math.Floor(e.Location.Y));
SKPoint aspectTouchLocation = anArtBoard.MatrixToAspectCoordinates().MapPoint(absoluteTouchLocation);
switch (e.ActionType)
{
case SKTouchAction.Pressed:
// the user added a finger
aBezierHandle = new BezierHandle(aspectTouchLocation);
bezierHandlePreviewCanvasView.InvalidateSurface();
break;
case SKTouchAction.Moved:
// the user moved a finger
if (e.InContact)
{
aBezierHandle.MouseControlPoint = aspectTouchLocation;
if (aBezierHandle.Magnitude <= bezierHandleThresholdSlider.Value)
{
aBezierHandle.MouseControlPoint = aBezierHandle.AnchorPoint;
}
}
bezierHandlePreviewCanvasView.InvalidateSurface();
break;
case SKTouchAction.Released:
// the user removed a finger
aBezierHandle.MouseControlPoint = aspectTouchLocation;
if (aBezierHandle.Magnitude <= bezierHandleThresholdSlider.Value)
{
aBezierHandle.MouseControlPoint = aBezierHandle.AnchorPoint;
}
bezierHandlePreviewCanvasView.InvalidateSurface();
break;
case SKTouchAction.Cancelled:
// the user removed a finger
aBezierHandle = null;
bezierHandlePreviewCanvasView.InvalidateSurface();
break;
}
// the location (in pixels) of the finger on the screen
//var pos = e.Location;
// set Handled to true if we handled the event
// if we don't, then parent views may also respond
e.Handled = true;
}
private void OnPaintCanvas(object sender, SKPaintSurfaceEventArgs e)
{
SKImageInfo info = e.Info;
SKSurface surface = e.Surface;
SKCanvas canvas = surface.Canvas;
int surfaceWidth = info.Width;
int surfaceHeight = info.Height;
SKPoint surfaceSize = new SKPoint(surfaceWidth, surfaceHeight);
//絵画開始
//背景色を塗る
canvas.Clear(PaintColors.OutOfRangeBackground.ToSKColor());
//アートボードの絵画
anArtBoard.SizeRecalculation(surfaceSize);
using (SKPaint paint = new SKPaint())
{
paint.Style = SKPaintStyle.Fill;
paint.Color = PaintColors.ArtBoardBackground.ToSKColor();
canvas.DrawRect(anArtBoard.AbsoluteRect, paint);
}
radius = Math.Min(anArtBoard.Size.X, anArtBoard.Size.Y) / 2.0f * 0.7f;
anArtBoard.InProgressPath.StrokeColor = PaintColors.Black;
anArtBoard.InProgressPath.StrokeSize = 5;
anArtBoard.InProgressPath.StrokeJoin = SKStrokeJoin.Round;
anArtBoard.InProgressPath.StrokeCap = SKStrokeCap.Round;
anArtBoard.InProgressPath.Screentone = PaintPatterns.CheckeredPattern(PaintColors.Blue.ToSKColor());
anArtBoard.BezierHandleList.Clear();
anArtBoard.BezierHandleList.Add(
new BezierHandle(
anArtBoard.AbsolutePosition + new SKPoint(anArtBoard.Size.X / 2, anArtBoard.Size.Y / 2 - radius),
anArtBoard.AbsolutePosition + new SKPoint(anArtBoard.Size.X / 2 + radius * controlPointCoefficient, anArtBoard.Size.Y / 2 - radius)));
anArtBoard.BezierHandleList.Add(
new BezierHandle(
anArtBoard.AbsolutePosition + new SKPoint(anArtBoard.Size.X / 2 + radius, anArtBoard.Size.Y / 2),
anArtBoard.AbsolutePosition + new SKPoint(anArtBoard.Size.X / 2 + radius, anArtBoard.Size.Y / 2 + radius * controlPointCoefficient)));
anArtBoard.BezierHandleList.Add(
new BezierHandle(
anArtBoard.AbsolutePosition + new SKPoint(anArtBoard.Size.X / 2, anArtBoard.Size.Y / 2 + radius),
anArtBoard.AbsolutePosition + new SKPoint(anArtBoard.Size.X / 2 - radius * controlPointCoefficient, anArtBoard.Size.Y / 2 + radius)));
anArtBoard.BezierHandleList.Add(
new BezierHandle(
anArtBoard.AbsolutePosition + new SKPoint(anArtBoard.Size.X / 2 - radius, anArtBoard.Size.Y / 2),
anArtBoard.AbsolutePosition + new SKPoint(anArtBoard.Size.X / 2 - radius, anArtBoard.Size.Y / 2 - radius * controlPointCoefficient)));
//絶対座標からアスペクト座標に変換
foreach (var bezierHandle in anArtBoard.BezierHandleList)
{
bezierHandle.AnchorPoint = anArtBoard.MatrixToAspectCoordinates().MapPoint(bezierHandle.AnchorPoint);
bezierHandle.MouseControlPoint = anArtBoard.MatrixToAspectCoordinates().MapPoint(bezierHandle.MouseControlPoint);
}
//暫定Path絵画
if (anArtBoard.BezierHandleList.Count >= 2)
{
anArtBoard.InProgressPath.Reset();
//bezierHandleList -> inProgressPath
anArtBoard.GenerateBezierPath(pathPreview);
anArtBoard.InProgressPath.Transform(this.anArtBoard.InverseMatrixToAbsoluteCoordinates());
canvas.DrawPath(anArtBoard.InProgressPath, anArtBoard.InProgressPath.GetFillPaint());
canvas.DrawPath(anArtBoard.InProgressPath, anArtBoard.InProgressPath.GetStrokePaint());
}
//コントロールポイントを絵画
SKPaint aBezierHandlePaint = new SKPaint()
{
IsAntialias = true,
Style = SKPaintStyle.Stroke,
Color = PaintColors.Lasso.ToSKColor(),
StrokeWidth = 2,
StrokeJoin = SKStrokeJoin.Round,
StrokeCap = SKStrokeCap.Round
};
SKPaint aBezierHandleAnchorPaint = new SKPaint()
{
IsAntialias = true,
Style = SKPaintStyle.Fill,
Color = PaintColors.Lasso.ToSKColor()
};
using (SKPath path = new SKPath())
{
foreach (var aBezierHandle in anArtBoard.BezierHandleList)
{
SKPoint anchorPoint = anArtBoard.InverseMatrixToAbsoluteCoordinates().MapPoint(aBezierHandle.AnchorPoint);
SKPoint mouseControlPoint = anArtBoard.InverseMatrixToAbsoluteCoordinates().MapPoint(aBezierHandle.MouseControlPoint);
SKPoint theOtherControlPoint = anArtBoard.InverseMatrixToAbsoluteCoordinates().MapPoint(aBezierHandle.TheOtherControlPoint);
path.MoveTo(anchorPoint);
path.LineTo(mouseControlPoint);
canvas.DrawCircle(anchorPoint, 4, aBezierHandleAnchorPaint);
path.MoveTo(anchorPoint);
path.LineTo(theOtherControlPoint);
}
canvas.DrawPath(path, aBezierHandlePaint);
}
}
//https://github.com/mono/SkiaSharp/releases/tag/v1.58.1
private void OnTouch(object sender, SKTouchEventArgs e)
{
//絶対座標
SKPoint absoluteTouchLocation = new SKPoint((int)Math.Floor(e.Location.X), (int)Math.Floor(e.Location.Y));
//アスペクト座標に変換
SKPoint aspectTouchLocation = anArtBoard.MatrixToAspectCoordinates().MapPoint(absoluteTouchLocation);
// the ID of the finger that toucged the screen
var pointerId = e.Id;
switch (e.ActionType)
{
case SKTouchAction.Pressed:
// the user added a finger
inProgressPathUndoButton.IsEnabled = false;
openPathButton.IsEnabled = false;
closePathButton.IsEnabled = false;
anArtBoard.BezierHandleList.Add(new BezierHandle(aspectTouchLocation));
canvasView.InvalidateSurface();
break;
case SKTouchAction.Moved:
// the user moved a finger
if (e.InContact)
{
if (anArtBoard.BezierHandleList.Count == 0)
{
break;
}
inProgressPathUndoButton.IsEnabled = false;
openPathButton.IsEnabled = false;
closePathButton.IsEnabled = false;
anArtBoard.BezierHandleList.Last().MouseControlPoint = aspectTouchLocation;
if (anArtBoard.BezierHandleList.Last().Magnitude <= SaveProperties.BezierHandleThreshold)
{
anArtBoard.BezierHandleList.Last().MouseControlPoint = anArtBoard.BezierHandleList.Last().AnchorPoint;
}
}
canvasView.InvalidateSurface();
break;
case SKTouchAction.Released:
// the user removed a finger
if (anArtBoard.BezierHandleList.Count == 0)
{
break;
}
inProgressPathUndoButton.IsEnabled = true;
openPathButton.IsEnabled = true;
closePathButton.IsEnabled = true;
anArtBoard.BezierHandleList.Last().MouseControlPoint = aspectTouchLocation;
if (anArtBoard.BezierHandleList.Last().Magnitude <= SaveProperties.BezierHandleThreshold)
{
anArtBoard.BezierHandleList.Last().MouseControlPoint = anArtBoard.BezierHandleList.Last().AnchorPoint;
}
canvasView.InvalidateSurface();
break;
case SKTouchAction.Cancelled:
// the user removed a finger
inProgressPathUndoButton.IsEnabled = true;
openPathButton.IsEnabled = true;
closePathButton.IsEnabled = true;
anArtBoard.BezierHandleList.RemoveAt(anArtBoard.BezierHandleList.Count - 1);
canvasView.InvalidateSurface();
break;
}
// the location (in pixels) of the finger on the screen
//var pos = e.Location;
// set Handled to true if we handled the event
// if we don't, then parent views may also respond
e.Handled = true;
}