Set an initial value for width&height #4
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If we don't set an initial value for width&height AnimationController throw Exception. Because, in the initState() we use checkBorders() and we check [width-50 and height-50]. If we don't use initial value chechBorders() try null-50.
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If we don't set an initial value for width&height AnimationController throw Exception. Because, in the initState() we use checkBorders() and we check [width-50 and height-50].
If we don't use initial value chechBorders() try null-50.