Fix CarouselView.weighted crashes when initlal viewportDimension is 0.0 #167628
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NICE fix! LGTM. Thank you!
| // (with weight 7), we leave some space before item 0 assuming there is another | ||
| // item -1 as the first visible item. | ||
| int get _firstVisibleItemIndex { | ||
| if (constraints.viewportMainAxisExtent == 0.0) { |
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Can we add a code comment to simply explain why we want to add this check here and below? Something like, If constraints.viewportMainAxisExtent is 0, firstChildExtent will be 0 and cause division error.
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….0 (flutter#167628) ## Description This PR fixes `CarouselView.weigthed` crashes due to given constraints being zero (which happen, for instance, when viewportDimension is 0.0). At startup, a warm-up frame can be produced before the Flutter engine has reported the initial view metrics. As a result, the first frame can be produced with a size of zero. In the context of CarouselView this leads to some problems mainly related to division by zero. Similar to flutter#167271 which addressed the same problem for `CarouselView`. ## Related Issue Fixes flutter#167621 ## Tests Adds 3 tests.
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Description
This PR fixes
CarouselView.weigthedcrashes due to given constraints being zero (which happen, for instance, when viewportDimension is 0.0).At startup, a warm-up frame can be produced before the Flutter engine has reported the
initial view metrics. As a result, the first frame can be produced with a size of zero. In the context of CarouselView this leads to some problems mainly related to division by zero.
Similar to #167271 which addressed the same problem for
CarouselView.Related Issue
Fixes #167621
Tests
Adds 3 tests.