protected override void debugPaintSize(PaintingContext context, Offset offset)
{
D.assert(() => {
if (child == null)
{
return(true);
}
//_debugPaint ??= new Paint()
if (_debugPaint == null)
{
_debugPaint = new Paint();
}
_debugPaint.shader = ui.Gradient.linear(
new Offset(0.0f, 0.0f),
new Offset(10.0f, 10.0f),
new List <Color> {
new Color(0x00000000), new Color(0xFFFF00FF), new Color(0xFFFF00FF),
new Color(0x00000000)
},
new List <float> {
0.25f, 0.25f, 0.75f, 0.75f
},
TileMode.repeated
);
_debugPaint.strokeWidth = 2.0f;
_debugPaint.style = PaintingStyle.stroke;
_ToolbarParentData childParentData = child.parentData as _ToolbarParentData;
context.canvas.drawPath(_clipPath().shift(offset + childParentData.offset), _debugPaint);
return(true);
});
}
Path _clipPath()
{
_ToolbarParentData childParentData = child.parentData as _ToolbarParentData;
Path rrect = new Path();
rrect.addRRect(
RRect.fromRectAndRadius(
new Offset(0, _isArrowPointingDown ? 0 : CupertinoTextSelectionUtils._kToolbarArrowSize.height)
& new Size(child.size.width, child.size.height - CupertinoTextSelectionUtils._kToolbarArrowSize.height),
CupertinoTextSelectionUtils._kToolbarBorderRadius
));
float arrowTipX = child.size.width / 2 + childParentData.arrowXOffsetFromCenter;
float arrowBottomY = _isArrowPointingDown
? child.size.height - CupertinoTextSelectionUtils._kToolbarArrowSize.height
: CupertinoTextSelectionUtils._kToolbarArrowSize.height;
float arrowTipY = _isArrowPointingDown ? child.size.height : 0;
Path arrow = new Path();
arrow.moveTo(arrowTipX, arrowTipY);
arrow.lineTo(arrowTipX - CupertinoTextSelectionUtils._kToolbarArrowSize.width / 2, arrowBottomY);
arrow.lineTo(arrowTipX + CupertinoTextSelectionUtils._kToolbarArrowSize.width / 2, arrowBottomY);
arrow.close();
return(Path.combine(PathOperation.union, rrect, arrow));
}
protected override void performLayout()
{
BoxConstraints constraints = this.constraints;
size = constraints.biggest;
if (child == null)
{
return;
}
BoxConstraints enforcedConstraint = constraints
.deflate(EdgeInsets.symmetric(horizontal: CupertinoTextSelectionUtils._kToolbarScreenPadding))
.loosen();
child.layout(heightConstraint.enforce(enforcedConstraint), parentUsesSize: true);
_ToolbarParentData childParentData = child.parentData as _ToolbarParentData;
float lowerBound = child.size.width / 2 + CupertinoTextSelectionUtils._kToolbarScreenPadding;
float upperBound = size.width - child.size.width / 2 - CupertinoTextSelectionUtils._kToolbarScreenPadding;
float adjustedCenterX = _arrowTipX.clamp(lowerBound, upperBound);
childParentData.offset = new Offset(adjustedCenterX - child.size.width / 2, _barTopY);
childParentData.arrowXOffsetFromCenter = _arrowTipX - adjustedCenterX;
}
public override void paint(PaintingContext context, Offset offset)
{
if (child == null)
{
return;
}
_ToolbarParentData childParentData = child.parentData as _ToolbarParentData;
context.pushClipPath(
needsCompositing,
offset + childParentData.offset,
Offset.zero & child.size,
_clipPath(),
(PaintingContext innerContext, Offset innerOffset) => innerContext.paintChild(child, innerOffset)
);
}
