public override void paint(PaintingContext context, Offset offset)
{
base.paint(context, offset);
Offset bottomRight = size.bottomRight(offset);
Rect outer = Rect.fromLTRB(offset.dx, offset.dy, bottomRight.dx, bottomRight.dy);
Rect center = outer.deflate(horizontalBorderSide.width / 2.0f);
const float sweepAngle = Mathf.PI / 2.0f;
RRect rrect = RRect.fromRectAndCorners(
center,
topLeft: borderRadius.topLeft,
topRight: borderRadius.topRight,
bottomLeft: borderRadius.bottomLeft,
bottomRight: borderRadius.bottomRight
).scaleRadii();
Rect tlCorner = Rect.fromLTWH(
rrect.left,
rrect.top,
rrect.tlRadiusX * 2.0f,
rrect.tlRadiusY * 2.0f
);
Rect blCorner = Rect.fromLTWH(
rrect.left,
rrect.bottom - (rrect.blRadiusY * 2.0f),
rrect.blRadiusX * 2.0f,
rrect.blRadiusY * 2.0f
);
Rect trCorner = Rect.fromLTWH(
rrect.right - (rrect.trRadiusX * 2.0f),
rrect.top,
rrect.trRadiusX * 2.0f,
rrect.trRadiusY * 2.0f
);
Rect brCorner = Rect.fromLTWH(
rrect.right - (rrect.brRadiusX * 2.0f),
rrect.bottom - (rrect.brRadiusY * 2.0f),
rrect.brRadiusX * 2.0f,
rrect.brRadiusY * 2.0f
);
Paint leadingPaint = leadingBorderSide.toPaint();
switch (textDirection)
{
case TextDirection.ltr: {
if (isLastButton)
{
Path leftPath = new Path();
leftPath.moveTo(rrect.left, rrect.bottom + leadingBorderSide.width / 2);
leftPath.lineTo(rrect.left, rrect.top - leadingBorderSide.width / 2);
context.canvas.drawPath(leftPath, leadingPaint);
Paint endingPaint = trailingBorderSide.toPaint();
Path endingPath = new Path();
endingPath.moveTo(rrect.left + horizontalBorderSide.width / 2.0f, rrect.top);
endingPath.lineTo(rrect.right - rrect.trRadiusX, rrect.top);
endingPath.addArc(trCorner, Mathf.PI * 3.0f / 2.0f, sweepAngle);
endingPath.lineTo(rrect.right, rrect.bottom - rrect.brRadiusY);
endingPath.addArc(brCorner, 0, sweepAngle);
endingPath.lineTo(rrect.left + horizontalBorderSide.width / 2.0f, rrect.bottom);
context.canvas.drawPath(endingPath, endingPaint);
}
else if (isFirstButton)
{
Path leadingPath = new Path();
leadingPath.moveTo(outer.right, rrect.bottom);
leadingPath.lineTo(rrect.left + rrect.blRadiusX, rrect.bottom);
leadingPath.addArc(blCorner, Mathf.PI / 2.0f, sweepAngle);
leadingPath.lineTo(rrect.left, rrect.top + rrect.tlRadiusY);
leadingPath.addArc(tlCorner, Mathf.PI, sweepAngle);
leadingPath.lineTo(outer.right, rrect.top);
context.canvas.drawPath(leadingPath, leadingPaint);
}
else
{
Path leadingPath = new Path();
leadingPath.moveTo(rrect.left, rrect.bottom + leadingBorderSide.width / 2);
leadingPath.lineTo(rrect.left, rrect.top - leadingBorderSide.width / 2);
context.canvas.drawPath(leadingPath, leadingPaint);
Paint horizontalPaint = horizontalBorderSide.toPaint();
Path horizontalPaths = new Path();
horizontalPaths.moveTo(rrect.left + horizontalBorderSide.width / 2.0f, rrect.top);
horizontalPaths.lineTo(outer.right - rrect.trRadiusX, rrect.top);
horizontalPaths.moveTo(rrect.left + horizontalBorderSide.width / 2.0f + rrect.tlRadiusX,
rrect.bottom);
horizontalPaths.lineTo(outer.right - rrect.trRadiusX, rrect.bottom);
context.canvas.drawPath(horizontalPaths, horizontalPaint);
}
break;
}
case TextDirection.rtl: {
if (isLastButton)
{
Path leadingPath = new Path();
leadingPath.moveTo(rrect.right, rrect.bottom + leadingBorderSide.width / 2);
leadingPath.lineTo(rrect.right, rrect.top - leadingBorderSide.width / 2);
context.canvas.drawPath(leadingPath, leadingPaint);
Paint endingPaint = trailingBorderSide.toPaint();
Path endingPath = new Path();
endingPath.moveTo(rrect.right - horizontalBorderSide.width / 2.0f, rrect.top);
endingPath.lineTo(rrect.left + rrect.tlRadiusX, rrect.top);
endingPath.addArc(tlCorner, Mathf.PI * 3.0f / 2.0f, -sweepAngle);
endingPath.lineTo(rrect.left, rrect.bottom - rrect.blRadiusY);
endingPath.addArc(blCorner, Mathf.PI, -sweepAngle);
endingPath.lineTo(rrect.right - horizontalBorderSide.width / 2.0f, rrect.bottom);
context.canvas.drawPath(endingPath, endingPaint);
}
else if (isFirstButton)
{
Path leadingPath = new Path();
leadingPath.moveTo(outer.left, rrect.bottom);
leadingPath.lineTo(rrect.right - rrect.brRadiusX, rrect.bottom);
leadingPath.addArc(brCorner, Mathf.PI / 2.0f, -sweepAngle);
leadingPath.lineTo(rrect.right, rrect.top + rrect.trRadiusY);
leadingPath.addArc(trCorner, 0, -sweepAngle);
leadingPath.lineTo(outer.left, rrect.top);
context.canvas.drawPath(leadingPath, leadingPaint);
}
else
{
Path leadingPath = new Path();
leadingPath.moveTo(rrect.right, rrect.bottom + leadingBorderSide.width / 2);
leadingPath.lineTo(rrect.right, rrect.top - leadingBorderSide.width / 2);
context.canvas.drawPath(leadingPath, leadingPaint);
Paint horizontalPaint = horizontalBorderSide.toPaint();
Path horizontalPaths = new Path();
horizontalPaths.moveTo(rrect.right - horizontalBorderSide.width / 2.0f, rrect.top);
horizontalPaths.lineTo(outer.left - rrect.tlRadiusX, rrect.top);
horizontalPaths.moveTo(rrect.right - horizontalBorderSide.width / 2.0f + rrect.trRadiusX,
rrect.bottom);
horizontalPaths.lineTo(outer.left - rrect.tlRadiusX, rrect.bottom);
context.canvas.drawPath(horizontalPaths, horizontalPaint);
}
break;
}
}
}
public override void paint(PaintingContext context, Offset offset)
{
Canvas canvas = context.canvas;
float currentValue = this._position.value;
float currentReactionValue = this._reaction.value;
float visualPosition = 0f;
switch (this.textDirection)
{
case TextDirection.rtl:
visualPosition = 1.0f - currentValue;
break;
case TextDirection.ltr:
visualPosition = currentValue;
break;
}
Color trackColor = this._value ? this.activeColor : CupertinoSwitchUtils._kTrackColor;
float borderThickness =
1.5f + (CupertinoSwitchUtils._kTrackRadius - 1.5f) * Mathf.Max(currentReactionValue, currentValue);
Paint paint = new Paint();
paint.color = trackColor;
Rect trackRect = Rect.fromLTWH(
offset.dx + (this.size.width - CupertinoSwitchUtils._kTrackWidth) / 2.0f,
offset.dy + (this.size.height - CupertinoSwitchUtils._kTrackHeight) / 2.0f,
CupertinoSwitchUtils._kTrackWidth,
CupertinoSwitchUtils._kTrackHeight
);
RRect outerRRect = RRect.fromRectAndRadius(trackRect, Radius.circular(CupertinoSwitchUtils
._kTrackRadius));
RRect innerRRect = RRect.fromRectAndRadius(trackRect.deflate(borderThickness), Radius.circular
(CupertinoSwitchUtils._kTrackRadius));
canvas.drawDRRect(outerRRect, innerRRect, paint);
float currentThumbExtension = CupertinoThumbPainter.extension * currentReactionValue;
float thumbLeft = MathUtils.lerpFloat(
trackRect.left + CupertinoSwitchUtils._kTrackInnerStart - CupertinoThumbPainter.radius,
trackRect.left + CupertinoSwitchUtils._kTrackInnerEnd - CupertinoThumbPainter.radius -
currentThumbExtension,
visualPosition
);
float thumbRight = MathUtils.lerpFloat(
trackRect.left + CupertinoSwitchUtils._kTrackInnerStart + CupertinoThumbPainter.radius +
currentThumbExtension,
trackRect.left + CupertinoSwitchUtils._kTrackInnerEnd + CupertinoThumbPainter.radius,
visualPosition
);
float thumbCenterY = offset.dy + this.size.height / 2.0f;
this._thumbPainter.paint(canvas, Rect.fromLTRB(
thumbLeft,
thumbCenterY - CupertinoThumbPainter.radius,
thumbRight,
thumbCenterY + CupertinoThumbPainter.radius
));
}