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.DefaultBackground);
SKBitmap bitmap = PaintPatterns.CheckeredPattern(PaintColors.Black);
//pathList絵画
foreach (var aPath in pathList)
{
if (!aPath.IsVisibility)
{
continue;
}
if (aPath.Points.Count >= 2)
{
canvas.DrawPath(aPath.ToSKPath(), aPath.FillPaint);
canvas.DrawPath(aPath.ToSKPath(), aPath.StrokePaint);
}
else if (aPath.Points.Count == 1)
{
canvas.DrawPoint(aPath.GetFirst(), aPath.StrokePaint);
}
}
//最前面
//Lasso色で暫定Pathを絵画
if (!inProgressPath.IsEmpty())
{
if (inProgressPath.Points.Count >= 2)
{
canvas.DrawPath(inProgressPath.ToSKPath(), inProgressPath.FillPaint);
canvas.DrawPath(inProgressPath.ToSKPath(), inProgressPath.StrokePaint);
}
else if (inProgressPath.Points.Count == 1)
{
canvas.DrawPoint(inProgressPath.GetFirst(), inProgressPath.StrokePaint);
}
}
}
public void PaintSurface(SkiaManager skiaManager, SKCanvas canvas)
{
foreach (var skiaObject in SketchEngine.SketchObjectList)
{
if (skiaObject is IRectTransformable)
{
var rect = skiaManager.SketchSpaceToCanvasSpaceMatrix.MapRect((skiaObject as IRectTransformable).RectTransform.Rect.ToSKRect());
canvas.DrawRect(rect, FramePaint);
canvas.DrawPoint(skiaManager.SketchSpaceToCanvasSpaceMatrix.MapPoint((skiaObject as IRectTransformable).RectTransform.Rect.Min.ToSKPoint()), MinPointPaint);
canvas.DrawPoint(skiaManager.SketchSpaceToCanvasSpaceMatrix.MapPoint((skiaObject as IRectTransformable).RectTransform.Rect.Max.ToSKPoint()), MaxPointPaint);
}
}
}
//
// Takes a list of points and draws lines between them
//
private void drawRoute(List <MapPoint> points, SKCanvas canvas)
{
for (int i = 0; i < points.Count - 1; i++) // count produces higher value than max index
{
if (i == 0)
{
canvas.DrawPoint(points[i].getPointLocation(), greenStroke);
}
else if (i < points.Count - 1)
{
canvas.DrawPoint(points[i].getPointLocation(), blackStroke); // not super necessary, illustrating where points were found
}
canvas.DrawLine(points[i].getPointLocation(), points[i + 1].getPointLocation(), routeColour);
}
}
/// handles / calls all the drawing
/// if you need to refresh / reset, call invalidate in
/// NavigationPageDetail()
private void canvas_PaintSurface(object sender, SKPaintSurfaceEventArgs e)
{
SKSurface surface = e.Surface; // screen
SKCanvas canvas = surface.Canvas; // drawable screen
int width = e.Info.Width; // screen dimensions
int height = e.Info.Height;
canvas.Scale(1, 1);
setFloorPlan(width, height);
canvas.DrawBitmap(image, new SKRect(0, 0, width, height));
canvas.Save(); // unnecessary at this moment, but leave in
// Calls routing
if (currentLocation != null)
{
LoadPoints pointLoader = new LoadPoints();
List <MapPoint> points = pointLoader.loadPoints(width, height);
points = calculateRoute(points);
drawRoute(points, canvas);
canvas.DrawPoint(points[points.Count - 1].pointLocation, redStroke);
}
}
public void Render(SKCanvas canvas, IGeometryVisual geometry, double scale)
{
var moist = geometry as IMoist;
if (moist == null || !moist.IsValid)
{
return;
}
using (var paint = new SKPaint())
{
// Setup common paint parameters
paint.Color = moist.ToolSettings.SelectedColor.ToSkiaColor();
paint.IsAntialias = true;
paint.IsStroke = false;
var text = moist.ToolSettings.SelectedText;
if (string.IsNullOrEmpty(text))
{
paint.StrokeWidth = (float)(moist.Size * scale);
paint.StrokeCap = SKStrokeCap.Round;
canvas.DrawPoint((float)(moist.Point.X * scale), (float)(moist.Point.Y * scale), paint);
}
else
{
paint.TextSize = (float)(moist.Size * scale);
// Get the path of the text to calibrate the touch point to the middle of the text area
var originalTextPath = paint.GetTextPath(text, (float)(moist.Point.X * scale), (float)(moist.Point.Y * scale));
// Set the mid of the text area to the touch point
var calibratedX = originalTextPath.Bounds.Left - originalTextPath.Bounds.Width / 2;
var calibratedY = originalTextPath.Bounds.Bottom + originalTextPath.Bounds.Height / 2;
// Set the right text color
var textColor = Converter.ContrastColor(moist.ToolSettings.SelectedColor);
// Get the path of the calibrated text area and add some padding to the rect
var calibratedTextPath = paint.GetTextPath(text, calibratedX, calibratedY);
// Rect parameters
float left;
float top;
float right;
float bottom;
float cornerRadius;
var textSizeDependentPadding = paint.TextSize / 4;
left = calibratedTextPath.Bounds.Left - textSizeDependentPadding;
top = calibratedTextPath.Bounds.Top - textSizeDependentPadding;
right = calibratedTextPath.Bounds.Right + textSizeDependentPadding;
bottom = calibratedTextPath.Bounds.Bottom + textSizeDependentPadding;
cornerRadius = paint.TextSize / 2;
var rect = new SKRect(left, top, right, bottom);
// Draw background rect
canvas.DrawRoundRect(rect, cornerRadius, cornerRadius, paint);
// Draw text
paint.Color = textColor.ToSkiaColor();
canvas.DrawText(text, calibratedX, calibratedY, paint);
// Draw the background border in same color as text
paint.IsStroke = true;
canvas.DrawRoundRect(rect, cornerRadius, cornerRadius, paint);
}
}
}
/// <summary>Draws the test layout area</summary>
/// <param name="info"></param>
/// <param name="canvas"></param>
private void DrawLayout(SKImageInfo info, SKCanvas canvas)
{
SKPaint debugPaint = new SKPaint()
{
Color = _test, StrokeWidth = 1, Style = SKPaintStyle.Stroke
};
// draw origin and control area frame
canvas.DrawPoint(this.Origin, new SKPaint()
{
Color = _test, StrokeWidth = 20, Style = SKPaintStyle.Stroke, StrokeCap = SKStrokeCap.Round
});
canvas.DrawRect(this.OuterRect, debugPaint);
canvas.DrawRect(this.InscribedRect, debugPaint);
// frame the entire canvas
canvas.DrawRect(0, 0, info.Width - 1, info.Height - 1, new SKPaint()
{
Color = _test, StrokeWidth = 1, Style = SKPaintStyle.Stroke
});
// draw cross hairs
canvas.DrawLine(this.Origin.X, 0, this.Origin.X, info.Height, debugPaint);
canvas.DrawLine(0, this.Origin.Y, info.Width, this.Origin.Y, debugPaint);
}
/// <inheritdoc />
protected override void DrawBar(ChartSerie serie, SKCanvas canvas, float headerHeight, float itemX, SKSize itemSize, SKSize barSize, float origin, float barX, float barY, SKColor color)
{
if (PointMode != PointMode.None)
{
var point = new SKPoint(barX - (itemSize.Width / 2) + (barSize.Width / 2), barY);
canvas.DrawPoint(point, color, PointSize, PointMode);
}
}
public override void Draw(SKCanvas canvas)
{
foreach (var point in Points)
{
canvas.DrawPoint(point, Paint);
}
//canvas.DrawPath(Path, Paint);
}
public void DrawPoint(float x, float y, SKPaint paint)
{
canvas.DrawPoint(x, y, paint);
if (calculateBounds)
{
displayObject.addBoundingPoint(x, y);
}
}
//public static void DrawPoint(SKCanvas canvas, SKPaint paint, SKPoint point, float raidus) {
// canvas.DrawCircle( point, raidus, paint );
//}
public static void DrawPoints(SKCanvas canvas, SKPaint paint, List <SKPoint> points)
{
if (points == null || points.Count == 0)// < 4
{
return;
}
for (int i = 0; i < points.Count; i++)
{
canvas.DrawPoint(points[i], paint);
}
}
protected void DrawPoints(SKCanvas canvas, SKPoint[] points)
{
if (points.Length > 0 && PointMode != PointMode.None)
{
for (int i = 0; i < points.Length; i++)
{
var entry = this.Entries.ElementAt(i);
var point = points[i];
canvas.DrawPoint(point, entry.Color, this.PointSize, this.PointMode);
}
}
}
/// <summary></summary>
/// <param name="info"></param>
/// <param name="canvas"></param>
private void DrawGraph(SKImageInfo info, SKCanvas canvas)
{
if (this.Series == null)
{
return;
}
float xf = (this.GraphFrame.Width / (this.XMax - this.XMin));
float yf = (this.GraphFrame.Height / (this.YMax - this.YMin));
// iterate each line series
foreach (LineSeries ls in this.Series)
{
using (SKPaint axisPaint = new SKPaint()
{
Color = ls.LineColor, StrokeWidth = ls.StrokeWidth, Style = SKPaintStyle.Stroke, IsAntialias = true
})
{
// normalize the points to the graph frame
SKPoint[] tps = new SKPoint[ls.Values.Length];
// calculate all the points
for (int i = 0; i < ls.Values.Length; ++i)
{
tps[i] = new SKPoint(this.GraphFrame.Left + ((ls.Values[i].X - this.XMin) * xf), this.TitleHeight + this.GraphFrame.Height - ((ls.Values[i].Y - this.YMin) * yf));
}
if (tps.Length < 2)
{
continue;
}
// draw the lines
for (int i = 0; i < tps.Length - 1; ++i)
{
canvas.DrawLine(tps[i], tps[i + 1], axisPaint);
}
// draw the dots
using (SKPaint ptPaint = new SKPaint()
{
Color = ls.LineColor, StrokeWidth = ls.StrokeWidth * 5.0F, StrokeCap = SKStrokeCap.Round, IsAntialias = true
})
{
for (int i = 0; i < tps.Length; ++i)
{
canvas.DrawPoint(tps[i], ptPaint);
}
}
}
}
}
private void DrawPoints(SKCanvas canvas)
{
if (PointMode != PointMode.None)
{
foreach (var pps in pointsPerSerie)
{
var entries = pps.Key.Entries.ToArray();
for (int i = 0; i < pps.Value.Count; i++)
{
var entry = entries[i];
var point = pps.Value.ElementAt(i);
canvas.DrawPoint(point, pps.Key.Color ?? entry.Color, PointSize, PointMode);
}
}
}
}
/// <summary>
/// Onload loads map of roskilde and
/// draws path that was calculated by Wificonnection
/// </summary>
private void OnCanvasViewPaintSurface(object sender, SKPaintSurfaceEventArgs args)
{
SKImageInfo info = args.Info;
SKSurface surface = args.Surface;
SKCanvas canvas = surface.Canvas;
canvas.Clear();
topOffset = info.Height / 5;
canvas.DrawBitmap(resourceBitmap, new SKRect(0, info.Height / 5f, info.Width, 2 * info.Height / 2.5f));
for (int i = 0; i < WifiConnection.xValues.Length; i++)
{
canvas.DrawPoint(WifiConnection.xValues[i] + 3, WifiConnection.yValues[i] + topOffset + 20, SKColor.Parse("#ff0000"));
}
}
/// <summary>
/// Draws path on canvas when event is triggers
/// not currently in use
/// </summary>
private void DrawingOnCanvas(object senderr, EventArgs ee)
{
CanvasView.InvalidateSurface();
CanvasView.PaintSurface += (sender, e) => {
SKSurface surface = e.Surface;
int surfaceWidth = e.Info.Width;
int surfaceHeight = e.Info.Height;
SKCanvas canvas = surface.Canvas;
for (int i = 0; i < WifiConnection.xValues.Length; i++)
{
canvas.DrawPoint(WifiConnection.xValues[i] + 3, WifiConnection.yValues[i] + topOffset + 20, SKColor.Parse("#ff0000"));
}
canvas.Flush();
};
}
protected void DrawPoints(IEnumerable <Entry> serie, SKCanvas canvas, SKPoint[] points, SKPoint selectedPoint)
{
if (points.Length > 0 && PointMode != PointMode.None)
{
var entries = serie as Entry[] ?? serie.ToArray();
for (int i = 0; i < points.Length; i++)
{
var entry = entries.ElementAt(i);
var point = points[i];
var size = PointSize;
if (point == selectedPoint)
{
size = SelectedPointSize;
}
canvas.DrawPoint(point, entry.Color, size, PointMode);
}
}
}
private static SKBitmap DrawArrayImage(BlockColors basis, PT[][] ArraySrc)
{
SKBitmap drawimage = new SKBitmap(blockinfo, SKBitmapAllocFlags.ZeroPixels);
SKCanvas skc = new SKCanvas(drawimage);
for (int y = 0; y < 8; y++)
{
for (int x = 0; x < 8; x++)
{
var PixelType = ArraySrc[y][x];
BCColor ChosenColor = SelectColor(PixelType, basis);
SKColor useChosen = ChosenColor;
skc.DrawPoint(new SKPoint(x, y), ChosenColor);
//drawimage.SetPixel(x, y, ChosenColor);
}
}
skc.Flush();
return(drawimage);
}
public void Render(SKCanvas canvas, IGeometryVisual gemoetry, double scale)
{
var mark = gemoetry as IMark;
if (mark == null || !mark.IsValid)
{
return;
}
using (var paint = new SKPaint())
{
paint.Color = mark.ToolSettings.SelectedColor.ToSkiaColor();
paint.IsAntialias = true;
paint.IsStroke = false;
paint.StrokeWidth = (float)(mark.Size * scale);
paint.StrokeCap = SKStrokeCap.Round;
canvas.DrawPoint((float)(mark.Point.X * scale), (float)(mark.Point.Y * scale), paint);
//TODO: Maybe fix real fill
}
}
/// <summary>
/// Рисует ФЧХ для параметра.
/// </summary>
/// <param name="plot"></param>
/// <param name="parameters"></param>
/// <param name="canvas"></param>
private void PaintSParameter(ParameterType type, SKPaint paint, Plot plot, Parameters parameters, SKCanvas canvas)
{
// цикл для расчета коэффициента масштабирования координат X
RestrictiveFrame frame = plot.Frame;
float scalingFactor = base.GetXScalingFactor(parameters, frame);
double i = plot.Frame.GetFirstPointX();
float j = (float)parameters.Fmin;
while (j * scalingFactor <= parameters.Fmax * scalingFactor)
{
float x = j;
float y = plot.GetCenterPointOfYAxis();
// Встречаем отрицательную бесконечность на 1 шаге.
if (parameters.GetMagnitude(ParameterType.S12, x) == Double.NegativeInfinity)
{
i += 0.04f;
j += 0.04f;
continue;
}
// Инвертирование значений.
float currentPhase = (float)parameters.GetPhase(type, x);
y += -(currentPhase);
if (plot.FirstPointY + y >= plot.SecondPointY)
{
i += 0.04f;
j += 0.04f;
continue;
}
canvas.DrawPoint(plot.FirstPointX + x * scalingFactor, y, paint);
i += 0.04f;
j += 0.04f;
}
}
private static SKImage DrawPath(IEnumerable <int[][]> points, float strokeWidth)
{
var info = new SKImageInfo(255, 255);
using (var surface = SKSurface.Create(info))
{
SKCanvas canvas = surface.Canvas;
canvas.Clear(SKColors.Transparent);
var paint = new SKPaint
{
StrokeWidth = strokeWidth,
Style = SKPaintStyle.Stroke,
Color = new SKColor(0x00, 0x00, 0x00),
StrokeCap = SKStrokeCap.Round,
};
foreach (var pathData in points)
{
if (pathData[0].Length == 1)
{
canvas.DrawPoint(new SKPoint(pathData[0][0], pathData[1][0]), paint);
}
else if (pathData[0].Length > 1)
{
var path = new SKPath();
path.MoveTo(new SKPoint(pathData[0][0], pathData[1][0]));
for (int i = 1; i < pathData[0].Length; i++)
{
path.LineTo(new SKPoint(pathData[0][i], pathData[1][i]));
}
canvas.DrawPath(path, paint);
}
}
return(surface.Snapshot());
}
}
public override void DrawContent(SKCanvas canvas, int width, int height)
{
var total = Series.Count();
if (total > 0)
{
var captionHeight = Series.First().Max(x =>
{
var result = 0.0f;
var hasLabel = !string.IsNullOrEmpty(x.Label);
var hasValueLabel = !string.IsNullOrEmpty(x.ValueLabel);
if (hasLabel || hasValueLabel)
{
var hasOffset = hasLabel && hasValueLabel;
var captionMargin = LabelTextSize * 0.60f;
var space = hasOffset ? captionMargin : 0;
if (hasLabel)
{
result += LabelTextSize;
}
if (hasValueLabel)
{
result += LabelTextSize;
}
}
return(result);
});
var center = new SKPoint(width / 2, height / 2);
var radius = ((Math.Min(width, height) - (2 * Margin)) / 2) - captionHeight;
var rangeAngle = (float)((Math.PI * 2) / total);
var startAngle = (float)Math.PI;
var nextEntry = Series.First().First();
var nextAngle = startAngle;
var nextPoint = GetPoint(nextEntry.Value, center, nextAngle, radius);
DrawBorder(canvas, center, radius);
for (int i = 0; i < total; i++)
{
var angle = nextAngle;
var entry = nextEntry;
var point = nextPoint;
var nextIndex = (i + 1) % total;
nextAngle = startAngle + (rangeAngle * nextIndex);
nextEntry = Series.First().ElementAt(nextIndex);
nextPoint = GetPoint(nextEntry.Value, center, nextAngle, radius);
// Border center bars
using (var paint = new SKPaint()
{
Style = SKPaintStyle.Stroke,
StrokeWidth = BorderLineSize,
Color = BorderLineColor,
IsAntialias = true,
})
{
var borderPoint = GetPoint(MaxValue, center, angle, radius);
canvas.DrawLine(point.X, point.Y, borderPoint.X, borderPoint.Y, paint);
}
// Values points and lines
using (var paint = new SKPaint()
{
Style = SKPaintStyle.Stroke,
StrokeWidth = BorderLineSize,
Color = entry.Color.WithAlpha((byte)(entry.Color.Alpha * 0.75f)),
PathEffect = SKPathEffect.CreateDash(new[] { BorderLineSize, BorderLineSize * 2 }, 0),
IsAntialias = true,
})
{
var amount = Math.Abs(entry.Value - AbsoluteMinimum) / ValueRange;
canvas.DrawCircle(center.X, center.Y, radius * amount, paint);
}
canvas.DrawGradientLine(center, entry.Color.WithAlpha(0), point,
entry.Color.WithAlpha((byte)(entry.Color.Alpha * 0.75f)), LineSize);
canvas.DrawGradientLine(point, entry.Color, nextPoint, nextEntry.Color, LineSize);
canvas.DrawPoint(point, entry.Color, PointSize, PointMode);
// Labels
var labelPoint = GetPoint(MaxValue, center, angle, radius + LabelTextSize + (PointSize / 2));
var alignment = SKTextAlign.Left;
if ((Math.Abs(angle - (startAngle + Math.PI)) < Epsilon) || (Math.Abs(angle - Math.PI) < Epsilon))
{
alignment = SKTextAlign.Center;
}
else if (angle > (float)(startAngle + Math.PI))
{
alignment = SKTextAlign.Right;
}
canvas.DrawCaptionLabels(entry.Label, entry.TextColor, entry.ValueLabel, entry.Color, LabelTextSize,
labelPoint, alignment);
}
}
}
/// <summary>Draw a progress meter</summary>
/// <remarks>
/// Value 1 is the part and Value 2 is the total possible
/// Value 1 can exceed value 2 for mutiple revolutions
/// </remarks>
private void PaintProgress(SKImageInfo info, SKCanvas canvas)
{
// set up the gradient colors
SKColor[] colors = new SKColor[2] {
this.ArcColor1.ToSKColor(), this.ArcColor2.ToSKColor()
};
// sweep is in DEG -> normalize the sweep angle between 0 and 360
//float sweep = QuickCalc.Revolution( ( this.Value1 / this.Value2 ) * 360.0F );
//sweep = ( sweep > 360.0 ) ? 360.0F : sweep;
float sweep = (this.Value1 % this.Value2 / this.Value2) * 360.0F;
// we have to roate the drawing canvas 90 degrees CCW
canvas.RotateDegrees(-90, info.Width / 2, info.Height / 2);
// no value
if (this.Value1 <= 0.0)
{
// draw background ring
using (SKPath path = new SKPath())
{
using (SKPaint bkgPaint = new SKPaint()
{
Color = _disabled, StrokeWidth = this.ArcLineWidth, Style = SKPaintStyle.Stroke, IsAntialias = true
})
{
path.AddArc(this.OuterRect, 0, 360.0F);
canvas.DrawPath(path, bkgPaint);
}
}
}
// less than 1 revolution
else if (this.Value1 < this.Value2)
{
// draw background ring
using (SKPath path = new SKPath())
{
using (SKPaint bkgPaint = new SKPaint()
{
Color = _disabled, StrokeWidth = this.ArcLineWidth, Style = SKPaintStyle.Stroke, IsAntialias = true
})
{
path.AddArc(this.OuterRect, 0, 360.0F);
canvas.DrawPath(path, bkgPaint);
}
}
// draw the partial arc
using (SKPath path = new SKPath())
{
using (SKPaint arcPaint = new SKPaint {
Style = SKPaintStyle.Stroke, Color = this.ArcColor1.ToSKColor()
})
{
arcPaint.StrokeWidth = this.ArcLineWidth;
arcPaint.StrokeCap = SKStrokeCap.Butt;
arcPaint.IsAntialias = true;
arcPaint.Shader = SKShader.CreateSweepGradient(this.Origin, colors, new Single[] { 0, 1 }, SKShaderTileMode.Clamp, 0, sweep);
// create an arc to sweep along
path.AddArc(this.OuterRect, 0, sweep);
canvas.DrawPath(path, arcPaint);
}
}
}
else // 1 or more revolution
{
// draw background ring
using (SKPath path = new SKPath())
{
using (SKPaint bkgPaint = new SKPaint()
{
Color = this.ArcColor1.ToSKColor(), StrokeWidth = this.ArcLineWidth
})
{
bkgPaint.Style = SKPaintStyle.Stroke;
bkgPaint.IsAntialias = true;
path.AddArc(this.OuterRect, 0, 360.0F);
canvas.DrawPath(path, bkgPaint);
}
}
// rotate the canvas by the sweep angle so we always start at 0
canvas.RotateDegrees(sweep - 180, info.Width / 2, info.Height / 2);
// draw the partial gradiant arc
using (SKPath path = new SKPath())
{
using (SKPaint arcPaint = new SKPaint {
Style = SKPaintStyle.Stroke
})
{
arcPaint.Color = this.ArcColor2.ToSKColor();
arcPaint.StrokeWidth = this.ArcLineWidth;
arcPaint.StrokeCap = SKStrokeCap.Butt;
arcPaint.IsAntialias = true;
// sweep gradient uses start angle to end angle
arcPaint.Shader = SKShader.CreateSweepGradient(this.Origin, colors, new Single[] { 0, 1 }, SKShaderTileMode.Clamp, 0, 180);
// create an arc to sweep along - uses start angle and then how many degrees to rotate from start
path.AddArc(this.OuterRect, 0, 180);
canvas.DrawPath(path, arcPaint);
}
}
canvas.RotateDegrees(-(sweep - 180), info.Width / 2, info.Height / 2);
}
// calc pts for the trailing handle
Tuple <float, float> pt1 = QuickCalc.Transform(QuickCalc.Deg2Rad(sweep + (this.ArcLineWidth * 0.075F)), this.OuterRect.Width / 2.0F);
Tuple <float, float> pt2 = QuickCalc.Transform(QuickCalc.Deg2Rad(sweep), this.OuterRect.Width / 2.0F);
// draw the trailing point with shadow
using (SKPaint handlePaint = new SKPaint()
{
Color = this.BackgroundColor.ToSKColor()
})
{
handlePaint.StrokeCap = SKStrokeCap.Round;
handlePaint.StrokeWidth = this.ArcLineWidth * 2;
handlePaint.IsAntialias = true;
// shadow
canvas.DrawPoint(pt1.Item1 + info.Rect.MidX, info.Rect.MidY + pt1.Item2, handlePaint);
// change color
handlePaint.Color = this.ArcColor2.ToSKColor();
// handle
canvas.DrawPoint(pt2.Item1 + info.Rect.MidX, info.Rect.MidY + pt2.Item2, handlePaint);
}
// rotate it all back
canvas.RotateDegrees(90, info.Width / 2, info.Height / 2);
}
/// <summary></summary>
/// <param name="info"></param>
/// <param name="canvas"></param>
private void DrawGraph(SKImageInfo info, SKCanvas canvas)
{
// max height of any bar
float height = this.BarFrame.Bottom - this.BarFrame.Top;
// find the max value
float maxValue = this.Frames.Max(e => e.Entry.Value);
float maxThreshold = this.Frames.Max(e => e.Entry.Threshold);
float max = new float[] { maxValue, maxThreshold }.Max();
// draw the horizontal scale
if (this.HorizontalScale)
{
// draw horizontal line every
float yline = this.BarFrame.Bottom;
float n = 10F;
using (SKPaint pen = new SKPaint()
{
Color = this.AxisColor.ToSKColor(), StrokeWidth = 1.0F, Style = SKPaintStyle.Stroke
})
{
while (yline > 0)
{
canvas.DrawLine(this.BarFrame.Left, yline, this.BarFrame.Right, yline, pen);
yline -= height / n;
}
}
}
// draw each bar
foreach (ColumnEntry entry in this.Frames)
{
// the bar drawing frame
SKRect rect = entry.Frame;
// calc margin from thickness - use denominator from [3,15]
float denom = 3.0F + ((15.0F - 3.0F) * (this.BarThickness / 100.0F));
float margin = rect.Width / denom;
// calculate threshold & value percentage of height
float pt = (entry.Entry.Threshold / max) * height;
float pv = (entry.Entry.Value / max) * height;
// calculate threshold rect and value rect
SKRect bart = new SKRect(rect.Left + margin, rect.Bottom - pt, rect.Right - margin, rect.Bottom);
SKRect barv = new SKRect(rect.Left + margin, rect.Bottom - pv, rect.Right - margin, rect.Bottom);
// draw threshold bar
//canvas.DrawRect(bart, new SKPaint() { Color = entry.Entry.BackgroundColor, StrokeWidth = 0, Style = SKPaintStyle.StrokeAndFill });
// epmty entries are ignored
if (entry.Entry == null)
{
continue;
}
// no data
if (entry.Entry.IsEmpty)
{
float rad = 10.0F;
using (SKPaint ptPaint = new SKPaint()
{
Color = this.AxisColor.ToSKColor(), StrokeWidth = rad, StrokeCap = SKStrokeCap.Round
})
{
canvas.DrawPoint(rect.MidX, rect.Bottom - rad, ptPaint);
}
}
// reached goal then paint threshold on top of value
else if (entry.Entry.Value >= entry.Entry.Threshold)
{
using (SKPaint barPaint = new SKPaint()
{
Color = entry.Entry.ValueColor, StrokeWidth = 0, Style = SKPaintStyle.StrokeAndFill
})
{
canvas.DrawRect(barv, barPaint);
barPaint.Color = entry.Entry.ThresholdColor;
canvas.DrawRect(bart, barPaint);
}
//// draw threshold line
//if (entry.Entry.Value > entry.Entry.Threshold)
// canvas.DrawLine(bart.Left, bart.Top, bart.Right, bart.Top,
// new SKPaint() { Color = entry.Entry.BackgroundColor, StrokeWidth = 3.0F, Style = SKPaintStyle.Stroke,
// PathEffect = SKPathEffect.CreateDash(new float[] { 10, 10 }, 20)
// });
}
else
{
using (SKPaint barPaint = new SKPaint()
{
Color = entry.Entry.ThresholdColor, StrokeWidth = 0, Style = SKPaintStyle.StrokeAndFill
})
{
canvas.DrawRect(bart, barPaint);
barPaint.Color = entry.Entry.ValueColor;
canvas.DrawRect(barv, barPaint);
}
}
}
}
public override void DrawContent(SKCanvas canvas, int width, int height)
{
var total = this.Entries?.Count() ?? 0;
if (total > 0)
{
var captionHeight = this.Entries.Max(x =>
{
var result = 0.0f;
var hasLabel = !string.IsNullOrEmpty(x.Label);
var hasValueLabel = !string.IsNullOrEmpty(x.ValueLabel);
if (hasLabel || hasValueLabel)
{
var hasOffset = hasLabel && hasValueLabel;
var captionMargin = this.LabelTextSize * 0.60f;
var space = hasOffset ? captionMargin : 0;
if (hasLabel)
{
result += this.LabelTextSize;
}
if (hasValueLabel)
{
result += this.LabelTextSize;
}
}
return(result);
});
var center = new SKPoint(width / 2, height / 2);
var radius = ((Math.Min(width, height) - (2 * Margin)) / 2) - captionHeight;
var rangeAngle = (float)((Math.PI * 2) / total);
var startAngle = (float)Math.PI;
var nextEntry = this.Entries.First();
var nextAngle = startAngle;
var nextPoint = this.GetPoint(nextEntry.Value * this.AnimationProgress, center, nextAngle, radius);
this.DrawBorder(canvas, center, radius);
using (var clip = new SKPath())
{
clip.AddCircle(center.X, center.Y, radius);
for (int i = 0; i < total; i++)
{
var angle = nextAngle;
var entry = nextEntry;
var point = nextPoint;
var nextIndex = (i + 1) % total;
nextAngle = startAngle + (rangeAngle * nextIndex);
nextEntry = this.Entries.ElementAt(nextIndex);
nextPoint = this.GetPoint(nextEntry.Value * this.AnimationProgress, center, nextAngle, radius);
canvas.Save();
canvas.ClipPath(clip);
// Border center bars
using (var paint = new SKPaint()
{
Style = SKPaintStyle.Stroke,
StrokeWidth = this.BorderLineSize,
Color = this.BorderLineColor,
IsAntialias = true,
})
{
var borderPoint = this.GetPoint(this.MaxValue, center, angle, radius);
canvas.DrawLine(point.X, point.Y, borderPoint.X, borderPoint.Y, paint);
}
// Values points and lines
using (var paint = new SKPaint()
{
Style = SKPaintStyle.Stroke,
StrokeWidth = this.BorderLineSize,
Color = entry.Color.WithAlpha((byte)(entry.Color.Alpha * 0.75f * this.AnimationProgress)),
PathEffect = SKPathEffect.CreateDash(new[] { this.BorderLineSize, this.BorderLineSize * 2 }, 0),
IsAntialias = true,
})
{
var amount = Math.Abs(entry.Value - this.AbsoluteMinimum) / this.ValueRange;
canvas.DrawCircle(center.X, center.Y, radius * amount, paint);
}
canvas.DrawGradientLine(center, entry.Color.WithAlpha(0), point, entry.Color.WithAlpha((byte)(entry.Color.Alpha * 0.75f)), this.LineSize);
canvas.DrawGradientLine(point, entry.Color, nextPoint, nextEntry.Color, this.LineSize);
canvas.DrawPoint(point, entry.Color, this.PointSize, this.PointMode);
canvas.Restore();
// Labels
var labelPoint = new SKPoint(0, radius + this.LabelTextSize + (this.PointSize / 2));
var rotation = SKMatrix.MakeRotation(angle);
labelPoint = center + rotation.MapPoint(labelPoint);
var alignment = SKTextAlign.Left;
if ((Math.Abs(angle - (startAngle + Math.PI)) < Epsilon) || (Math.Abs(angle - Math.PI) < Epsilon))
{
alignment = SKTextAlign.Center;
}
else if (angle > (float)(startAngle + Math.PI))
{
alignment = SKTextAlign.Right;
}
canvas.DrawCaptionLabels(entry.Label, entry.TextColor, entry.ValueLabel, entry.Color.WithAlpha((byte)(255 * this.AnimationProgress)), this.LabelTextSize, labelPoint, alignment, base.Typeface, out var _);
}
}
}
}
/// <summary>Draw a pie meter</summary>
private void PaintPie(SKImageInfo info, SKCanvas canvas, bool handles = false)
{
float arcWidth = (info.Width / 15.0F) * 1.0F;
// always draw a background ring
using (SKPath path = new SKPath())
{
path.AddArc(this.OuterRect, 0, 360);
canvas.DrawPath(path, new SKPaint()
{
Color = _disabled, StrokeWidth = this.ArcLineWidth, Style = SKPaintStyle.Stroke, IsAntialias = true
});
}
// calc the sum
float total = this.Value1 + this.Value2;
// bail if both are 0
if (total <= 0.0)
{
return;
}
// calc the sweep angle
float sweep = (this.Value1 / total) * 360.0F;
// calc the angles, 0 is to the right, start from overhead
float rewardSweep = (sweep > 360.0) ? 360.0F : sweep;
float bonusStartAngle = QuickCalc.Revolution(270.0F + rewardSweep);
// draw arc 1
using (SKPath path = new SKPath())
{
using (SKPaint arcPaint = new SKPaint {
Style = SKPaintStyle.Stroke, Color = this.ArcColor1.ToSKColor(), StrokeWidth = this.ArcLineWidth, IsAntialias = true
})
{
path.AddArc(this.OuterRect, 270, rewardSweep);
canvas.DrawPath(path, arcPaint);
}
}
// draw arc 2
using (SKPath path = new SKPath())
{
using (SKPaint arcPaint = new SKPaint {
Style = SKPaintStyle.Stroke, Color = this.ArcColor2.ToSKColor(), StrokeWidth = this.ArcLineWidth, IsAntialias = true
})
{
path.AddArc(this.OuterRect, bonusStartAngle, 360 - rewardSweep);
canvas.DrawPath(path, arcPaint);
}
}
if (!handles)
{
return;
}
// draw handles
using (SKPaint handlePaint = new SKPaint()
{
Color = this.ArcColor1.ToSKColor(), StrokeCap = SKStrokeCap.Round, StrokeWidth = this.ArcLineWidth * 2, IsAntialias = true
})
{
canvas.DrawPoint(this.VerticalCenter, this.OuterRect.Top, handlePaint);
// where's the other handle?
float rad = QuickCalc.Deg2Rad(QuickCalc.Revolution(360 - rewardSweep + 90));
Tuple <float, float> pt = QuickCalc.Transform(rad, this.OuterRect.Width / 2.0F);
handlePaint.Color = this.ArcColor2.ToSKColor();
canvas.DrawPoint(pt.Item1 + info.Rect.MidX, info.Rect.MidY - pt.Item2, handlePaint);
}
}
public override void Draw(SKCanvas canvas)
{
canvas.DrawPoint(DrawingPoint, Paint);
}
private void Canvas_PaintSurface(object sender, SkiaSharp.Views.Forms.SKPaintSurfaceEventArgs e)
{
if (BindingContext is MarsRoverModel model)
{
if (model.CurrentPlateau != null &&
model.CurrentRover != null)
{
SKImageInfo info = e.Info;
SKSurface surface = e.Surface;
SKCanvas canvas = surface.Canvas;
canvas.Clear();
SKPaint gridLinePaint = new SKPaint
{
Style = SKPaintStyle.Stroke,
Color = SKColors.LightGray,
StrokeWidth = 2
};
SKPaint startPointPaint = new SKPaint
{
Style = SKPaintStyle.Stroke,
Color = SKColors.Green,
StrokeWidth = 8
};
SKPaint endPointPaint = new SKPaint
{
Style = SKPaintStyle.Stroke,
Color = SKColors.Red,
StrokeWidth = 8
};
SKPaint pathLinePaint = new SKPaint
{
Style = SKPaintStyle.Stroke,
Color = SKColors.Black,
StrokeWidth = 2
};
float xBreak = (float)info.Width / model.CurrentPlateau.UpperX;
for (int i = 0; i <= model.CurrentPlateau.UpperX; i++)
{
canvas.DrawLine(xBreak * i, 0, xBreak * i, info.Width, gridLinePaint);
}
float yBreak = (float)info.Height / model.CurrentPlateau.UpperY;
for (int i = 0; i <= model.CurrentPlateau.UpperY; i++)
{
canvas.DrawLine(0, yBreak * i, info.Height, yBreak * i, gridLinePaint);
}
if (model.Path != null)
{
Tuple <float, float> lastPos = null;
foreach (var pos in model.Path)
{
float posX = pos.Item1 * xBreak;
float posY = pos.Item2 * yBreak;
if (lastPos == null)
{
canvas.DrawPoint(posX, posY, startPointPaint);
}
else
{
canvas.DrawLine(lastPos.Item1, lastPos.Item2, posX, posY, pathLinePaint);
}
lastPos = new Tuple <float, float>(posX, posY);
}
canvas.DrawPoint(lastPos.Item1, lastPos.Item2, endPointPaint);
using (var snapshot = surface.Snapshot())
using (var data = snapshot.Encode(SKEncodedImageFormat.Png, 80))
using (var ms = new MemoryStream())
{
data.SaveTo(ms);
byte[] imageBytes = ms.ToArray();
string base64String = Convert.ToBase64String(imageBytes);
model.SendImage(base64String);
}
}
}
}
}
void OnCanvasViewPaintSurface(object sender, SKPaintSurfaceEventArgs args)
{
SKImageInfo info = args.Info;
SKSurface surface = args.Surface;
SKCanvas canvas = surface.Canvas;
canvas.Clear();
// Make image into bitmap
SKBitmap bitmap = SKBitmap.Decode(ViewModel.Image.GetStreamWithImageRotatedForExternalStorage());
// Find rectangle to fit bitmap
float scale = Math.Min((float)info.Width / bitmap.Width,
(float)info.Height / bitmap.Height);
SKRect rect = SKRect.Create(scale * bitmap.Width,
scale * bitmap.Height);
float x = (info.Width - rect.Width) / 2;
float y = (info.Height - rect.Height) / 2;
rect.Offset(x, y);
// Draw the image
canvas.DrawBitmap(bitmap, rect);
// Prep rectangle paint
var rectPaint = new SKPaint
{
Color = new SKColor(255, 0, 0),
IsStroke = true,
StrokeWidth = 2
};
// Prep text paint
var textPaint = new SKPaint
{
Color = new SKColor(255, 0, 0),
TextSize = 48
};
// Draw the face boxes
ViewModel.Faces.ToList().ForEach(face =>
{
var faceRect = SKRect.Create(scale * face.FaceRectangle.Left + x,
scale * face.FaceRectangle.Top + y,
scale * face.FaceRectangle.Width,
scale * face.FaceRectangle.Height);
canvas.DrawRect(faceRect, rectPaint);
canvas.DrawText(ViewModel.Faces.IndexOf(face).ToString(),
(scale * face.FaceRectangle.Left + x) + (scale * face.FaceRectangle.Width / 2),
(scale * face.FaceRectangle.Top + y),
textPaint);
// If landmarks are present, draw them too!
if (face.FaceLandmarks != null)
{
var landmarkPaint = new SKPaint
{
Color = new SKColor(255, 0, 0),
StrokeWidth = 6
};
face.FaceLandmarks.GetType().GetProperties().ToList().ForEach(landmark =>
{
if (landmark.PropertyType == typeof(Coordinate))
{
var coord = (Coordinate)landmark.GetValue(face.FaceLandmarks);
canvas.DrawPoint((float)(scale * coord.X + x), (float)(scale * coord.Y + y), landmarkPaint);
}
});
}
});
}
protected void DrawPoints(SKCanvas canvas, SKPoint[] points, float origin = 0)
{
if (points.Length > 0 && PointMode != PointMode.None)
{
for (int i = 0; i < points.Length; i++)
{
var entry = this.Entries.ElementAt(i);
var point = points[i];
var size = entry.Selected ? 20 : this.PointSize;
if (entry.Selected)
{
// Line from Point to bottom
canvas.DrawLine(point.X, point.Y, point.X, origin, new SKPaint()
{
Color = new SKColor(255, 255, 255)
});
// Draw Annotation
var path = new SKPath();
if (i == 0) // Inverse
{
canvas.DrawRoundRect(new SKRect(point.X + 90, point.Y - 70, point.X, point.Y - 20), 5, 5, new SKPaint()
{
Color = new SKColor(255, 255, 255)
});
path.MoveTo(point.X, point.Y - 15);
path.RLineTo(0, -10);
path.RLineTo(20, 0);
path.LineTo(point.X, point.Y - 15);
canvas.DrawText(entry.AnnotationLabel ?? "$790", point.X + 45, point.Y - 30, new SKPaint()
{
IsAntialias = true, Color = new SKColor(0, 0, 0), TextAlign = SKTextAlign.Center, TextSize = 20
});
canvas.DrawText(entry.AnnotationHeadingLabel ?? "3/14 - 7/14", point.X + 45, point.Y - 55, new SKPaint()
{
IsAntialias = true, Color = new SKColor(61, 61, 61), TextAlign = SKTextAlign.Center, TextSize = 11
});
// TODO: SkTypeface.FromFile("path/to/typeface.ttf");
}
else
{
canvas.DrawRoundRect(new SKRect(point.X - 90, point.Y - 70, point.X, point.Y - 20), 5, 5, new SKPaint()
{
Color = new SKColor(255, 255, 255)
});
path.MoveTo(point.X, point.Y - 15);
path.RLineTo(0, -10);
path.RLineTo(-20, 0);
path.LineTo(point.X, point.Y - 15);
canvas.DrawText(entry.AnnotationLabel ?? "$790", point.X - 45, point.Y - 30, new SKPaint()
{
IsAntialias = true, Color = new SKColor(0, 0, 0), TextAlign = SKTextAlign.Center, TextSize = 20
});
canvas.DrawText(entry.AnnotationHeadingLabel ?? "3/14 - 7/14", point.X - 45, point.Y - 55, new SKPaint()
{
IsAntialias = true, Color = new SKColor(61, 61, 61), TextAlign = SKTextAlign.Center, TextSize = 11
});
// TODO: SkTypeface.FromFile("path/to/typeface.ttf");
}
canvas.DrawPath(path, new SKPaint()
{
IsAntialias = true, Color = new SKColor(255, 255, 255), StrokeWidth = 1, Style = SKPaintStyle.StrokeAndFill
});
canvas.DrawPoint(point, entry.Color, size, this.PointMode);
canvas.DrawPoint(point, new SKColor(0, 0, 0), size - 12, this.PointMode);
}
else
{
// Line from Point to bottom
canvas.DrawLine(point.X, point.Y, point.X, origin, new SKPaint()
{
Color = new SKColor(255, 255, 255, 127), PathEffect = SKPathEffect.CreateDash(new float[] { 10, 2 }, 20)
});
canvas.DrawPoint(point, entry.Color, size, this.PointMode);
}
AddTouchHandler(new Rectangle(new Point(point.X - 20, point.Y - 20), new Size(40, 40)), () =>
{
foreach (var item in Entries)
{
if (item == entry)
{
entry.Selected = !entry.Selected;
}
else
{
item.Selected = false;
}
}
});
}
}
}
protected override void OnPaintSurface(SKPaintSurfaceEventArgs e)
{
base.OnPaintSurface(e);
SKImageInfo info = e.Info;
SKSurface surface = e.Surface;
SKCanvas canvas = surface.Canvas;
canvas.Clear();
using (var primaryPaint = new SKPaint
{
IsAntialias = true,
Style = SKPaintStyle.Stroke,
StrokeCap = SKStrokeCap.Butt,
StrokeWidth = (float)Thickness,
})
using (var path = new SKPath())
using (var backgroundPath = new SKPath())
{
var margin = (float)Thickness / 2.0f;
if (RadialBackgroundColor != Color.Default && RadialBackgroundColor != Color.Transparent)
{
primaryPaint.Color = RadialBackgroundColor.ToSKColor();
backgroundPath.AddArc(new SKRect(margin, margin, info.Width - margin, info.Height - margin), -90 + (float)StartAngle, (float)SweepAngle);
canvas.DrawPath(backgroundPath, primaryPaint);
if (backgroundPath.PointCount > 0)
{
if (StartStrokeCap == RadialProgressStrokeCap.Round)
{
primaryPaint.StrokeCap = SKStrokeCap.Round;
canvas.DrawPoint(backgroundPath.Points[0], primaryPaint);
}
if (EndStrokeCap == RadialProgressStrokeCap.Round)
{
primaryPaint.StrokeCap = SKStrokeCap.Round;
canvas.DrawPoint(backgroundPath.Points[backgroundPath.PointCount - 1], primaryPaint);
}
}
}
SKColor[] colors = new SKColor[]
{
RadialStartColor.ToSKColor(),
RadialStartColor.ToSKColor(),
RadialMiddleColor.ToSKColor(),
RadialMiddleColor.ToSKColor(),
RadialEndColor.ToSKColor(),
RadialEndColor.ToSKColor(),
RadialStartColor.ToSKColor(),
};
float[] colorPos = new float[]
{
0, // start
(1 / 6.0f) * 1, // start
(1 / 6.0f) * 2, // mid
(1 / 6.0f) * 3, // mid
(1 / 6.0f) * 4, // end
(1 / 6.0f) * 5.7f, // end
0.95f // start
};
primaryPaint.StrokeCap = SKStrokeCap.Butt;
primaryPaint.Shader = SKShader.CreateSweepGradient(new SKPoint(info.Rect.MidX, info.Rect.MidY), colors, colorPos, SKShaderTileMode.Repeat, -90 + (float)StartAngle, -90 + (float)StartAngle + (float)SweepAngle);
path.AddArc(new SKRect(margin, margin, info.Width - margin, info.Height - margin), -90 + (float)StartAngle, (float)SweepAngle * (float)Progress);
canvas.DrawPath(path, primaryPaint);
if (path.PointCount > 2)
{
if (StartStrokeCap == RadialProgressStrokeCap.Round)
{
primaryPaint.StrokeCap = SKStrokeCap.Round;
canvas.DrawPoint(path.Points[0], primaryPaint);
}
if (EndStrokeCap == RadialProgressStrokeCap.Round)
{
primaryPaint.StrokeCap = SKStrokeCap.Round;
canvas.DrawPoint(path.Points[path.PointCount - 1], primaryPaint);
}
}
if (HasLabel)
{
using (var fontPaint = new SKPaint
{
IsAntialias = true,
Color = TextColor.ToSKColor(),
TextSize = (float)FontSize,
})
using (var fontPath = new SKPath())
{
fontPath.AddPathReverse(path);
canvas.DrawTextOnPath(string.Format(TextFormat, Progress), fontPath, 0, (float)FontSize / 3.0f, fontPaint);
}
}
}
}
