protected internal override void Redraw()
{
if (!INTERNAL_VisualTreeManager.IsElementInVisualTree(this))
{
return;
}
if (Points?.Count < 2)
{
return;
}
double minX, minY, maxX, maxY;
GetMinMaxXY(out minX, out maxX, out minY, out maxY);
Size shapeActualSize;
INTERNAL_ShapesDrawHelpers.PrepareStretch(this, _canvasDomElement, 0, maxX, 0, maxY, Stretch, out shapeActualSize);
double horizontalMultiplicator;
double verticalMultiplicator;
double xOffsetToApplyBeforeMultiplication;
double yOffsetToApplyBeforeMultiplication;
double xOffsetToApplyAfterMultiplication;
double yOffsetToApplyAfterMultiplication;
INTERNAL_ShapesDrawHelpers.GetMultiplicatorsAndOffsetForStretch(this, StrokeThickness, 0, maxX, 0, maxY,
Stretch, shapeActualSize, out horizontalMultiplicator, out verticalMultiplicator, out xOffsetToApplyBeforeMultiplication,
out yOffsetToApplyBeforeMultiplication, out xOffsetToApplyAfterMultiplication, out yOffsetToApplyAfterMultiplication, out _marginOffsets);
ApplyMarginToFixNegativeCoordinates(new Point());
if (Stretch == Stretch.None)
{
ApplyMarginToFixNegativeCoordinates(_marginOffsets);
}
INTERNAL_ShapesDrawHelpers.PrepareLines(_canvasDomElement, Points, StrokeThickness, false);
//todo: make sure the parameters below are correct.
Shape.DrawFillAndStroke(this, FillRule == FillRule.Nonzero ? "nonzero" : "evenodd", xOffsetToApplyAfterMultiplication,
yOffsetToApplyAfterMultiplication, xOffsetToApplyAfterMultiplication + maxX, yOffsetToApplyAfterMultiplication + maxY,
horizontalMultiplicator, verticalMultiplicator, xOffsetToApplyBeforeMultiplication, yOffsetToApplyBeforeMultiplication, shapeActualSize);
}
override internal protected void Redraw()
{
if (Points.Count < 2)
{
// It is fine to have 0 or 1 points but nothing to draw in that case.
return;
}
double minX = Points[0].X;
double minY = Points[0].Y;
double maxX = Points[0].X;
double maxY = Points[0].Y;
foreach (var p in Points)
{
if (p.X < minX)
{
minX = p.X;
}
if (p.Y < minY)
{
minY = p.Y;
}
if (p.X > maxX)
{
maxX = p.X;
}
if (p.Y > maxY)
{
maxY = p.Y;
}
}
Size shapeActualSize;
INTERNAL_ShapesDrawHelpers.PrepareStretch(this, _canvasDomElement, minX, maxX, minY, maxY, Stretch, out shapeActualSize);
double horizontalMultiplicator;
double verticalMultiplicator;
double xOffsetToApplyBeforeMultiplication;
double yOffsetToApplyBeforeMultiplication;
double xOffsetToApplyAfterMultiplication;
double yOffsetToApplyAfterMultiplication;
INTERNAL_ShapesDrawHelpers.GetMultiplicatorsAndOffsetForStretch(this, StrokeThickness, minX, maxX, minY, maxY, Stretch, shapeActualSize, out horizontalMultiplicator, out verticalMultiplicator, out xOffsetToApplyBeforeMultiplication, out yOffsetToApplyBeforeMultiplication, out xOffsetToApplyAfterMultiplication, out yOffsetToApplyAfterMultiplication, out _marginOffsets);
ApplyMarginToFixNegativeCoordinates(new Point());
if (Stretch == Stretch.None)
{
ApplyMarginToFixNegativeCoordinates(_marginOffsets);
}
object context = CSHTML5.Interop.ExecuteJavaScriptAsync(@"$0.getContext('2d')", _canvasDomElement);
//we remove the previous drawing:
CSHTML5.Interop.ExecuteJavaScriptAsync("$0.clearRect(0,0, $1, $2)", context, shapeActualSize.Width, shapeActualSize.Height);
double opacity = Stroke == null ? 1 : Stroke.Opacity;
object strokeValue = GetHtmlBrush(this, context, Stroke, opacity, minX, minY, maxX, maxY, horizontalMultiplicator, verticalMultiplicator, xOffsetToApplyBeforeMultiplication, yOffsetToApplyBeforeMultiplication, shapeActualSize);
object fillValue = GetHtmlBrush(this, context, Fill, opacity, minX, minY, maxX, maxY, horizontalMultiplicator, verticalMultiplicator, xOffsetToApplyBeforeMultiplication, yOffsetToApplyBeforeMultiplication, shapeActualSize);
if (fillValue != null)
{
CSHTML5.Interop.ExecuteJavaScriptAsync(@"$0.fillStyle = $1", context, fillValue);
}
else
{
// If fillValue is not set it will be black.
CSHTML5.Interop.ExecuteJavaScriptAsync(@"$0.fillStyle = 'transparent'", context);
}
INTERNAL_ShapesDrawHelpers.PrepareLines(_canvasDomElement, Points, StrokeThickness, true);
if (strokeValue != null)
{
CSHTML5.Interop.ExecuteJavaScriptAsync(@"$0.strokeStyle = $1", context, strokeValue);
}
CSHTML5.Interop.ExecuteJavaScriptAsync("$0.lineWidth = $1", context, StrokeThickness.ToString());
if (Stroke != null && StrokeThickness > 0)
{
CSHTML5.Interop.ExecuteJavaScriptAsync("$0.stroke()", context);
}
}
