void _paintThumb(
double before,
double inside,
double after,
double viewport,
Canvas canvas,
Size size,
painterDelegate painter
)
{
double thumbExtent = Math.Min(viewport, this.minOverscrollLength);
if (before + inside + after > 0.0)
{
double fractionVisible = inside / (before + inside + after);
thumbExtent = Math.Max(
thumbExtent,
viewport * fractionVisible - 2 * this.mainAxisMargin
);
if (before != 0.0 && after != 0.0)
{
thumbExtent = Math.Max(
this.minLength,
thumbExtent
);
}
else
{
thumbExtent = Math.Max(
thumbExtent,
this.minLength * (((inside / viewport) - 0.8) / 0.2)
);
}
}
double fractionPast = before / (before + after);
double thumbOffset = (before + after > 0.0)
? fractionPast * (viewport - thumbExtent - 2 * this.mainAxisMargin) + this.mainAxisMargin
: this.mainAxisMargin;
painter(canvas, size, thumbOffset, thumbExtent);
}
void _paintThumb(
float before,
float inside,
float after,
float viewport,
Canvas canvas,
Size size,
painterDelegate painter
)
{
float thumbExtent = Mathf.Min(viewport, this.minOverscrollLength);
if (before + inside + after > 0.0)
{
float fractionVisible = inside / (before + inside + after);
thumbExtent = Mathf.Max(
thumbExtent,
viewport * fractionVisible - 2 * this.mainAxisMargin
);
if (before != 0.0 && after != 0.0)
{
thumbExtent = Mathf.Max(
this.minLength,
thumbExtent
);
}
else
{
thumbExtent = Mathf.Max(
thumbExtent,
this.minLength * (((inside / viewport) - 0.8f) / 0.2f)
);
}
float fractionPast = before / (before + after);
float thumbOffset = (before + after > 0.0)
? fractionPast * (viewport - thumbExtent - 2 * this.mainAxisMargin) + this.mainAxisMargin
: this.mainAxisMargin;
painter(canvas, size, thumbOffset, thumbExtent);
}
}
