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The percentage observer won't work well #2

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letsar opened this issue Jun 23, 2018 · 0 comments
Closed

The percentage observer won't work well #2

letsar opened this issue Jun 23, 2018 · 0 comments
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letsar commented Jun 23, 2018

As stated by Hixie (flutter/flutter#466 (comment)):

the percentage observer won't work well because it'll always lag by one frame.

To resolve this:

You could create a kind of RenderObject that takes the percentage as one of the constraints. Maybe its constraints could be a class with a double (the percentage) and a BoxConstraints object, and its child would be a RenderBox to which you pass the BoxConstraints. If you model this render object after the LayoutBuilder widget and its render object, you can have the same API you have today but without the lag.
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