maxActiveSlideAbsDelta property

double get maxActiveSlideAbsDelta

Maximum |currentDelta| across every active slide entry, or 0.0 when no slides are active.

The render object uses this as a "slide overreach" to widen its build and iteration ranges during a FLIP slide: a row whose structural y is outside the viewport can still be painted inside the viewport if its slide delta translates it there, and conversely a row whose structural y is inside the viewport can translate out. Both ranges (build window in performLayout, iteration window in paint/hit-test) need to extend by this amount on each side to cover the displaced rows — otherwise a swap of two large subtrees paints a visible gap where a sliding row should appear.

Shrinks toward 0.0 as the slide progresses (since entries' currentDelta lerps to 0), so the transient overbuild contracts with the animation.

Implementation

double get maxActiveSlideAbsDelta => _slide.maxAbsDelta;