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SheetController.jumpTo moves the sheet to the given offset immediately, without animating, and keeps it idle with that offset as its target, so the position is re-resolved whenever the viewport or the content changes. animateTo cannot do this: it requires a positive duration, even a tiny one shows the old offset for at least one frame, and on completion the sheet settles to the nearest snap offset rather than keeping a target between snaps. jumpTo mirrors ScrollController.jumpTo.
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Hi @fryette, I looks like this is a duplicate of #552. Can you take a look at this comment? |
fujidaiti
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Thanks, and sorry I missed #552. I've answered your question in #551 (comment). My use case is programmatic placement of sheets that are still draggable, not finger following. |
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SheetController gains jumpTo(SheetOffset), which moves the sheet to the given offset immediately, without animating, mirroring ScrollController.jumpTo. The sheet stays idle with that offset as its target, so the position is re-resolved whenever the viewport or the content changes (for example a viewport that is resized after the jump), until another movement such as a drag or animateTo begins. A running animation that jumpTo interrupts completes its future, as it does for any other interruption.
animateTo cannot be used for this: AnimatedSheetActivity asserts that the duration is positive, even a tiny duration shows the old offset for at least one frame, and on completion the sheet calls goBallistic(0), so a target that lies between snap offsets is not kept.
Related to #551; the use case is described in #551 (comment).