add_cart_parabola

Description:

add cart parabola

flutter_mall_cart #
指定起点、终点(左右均可)和widget A，将A以抛物线的形式从起点运动到终点（在同一水平线上的话，效果啥样我也不清楚了）。
the function is you can give a start and end point(on left or right its compatible,but not in a horzontal line),and provide a widget.ParabolaAnimateWidget will animate the widget that you provide, from start to end point follow a parabola path.

DEMO #
demo is here:
https://github.com/bladeofgod/throw_cart_demo
USAGE #
看名字差不多就能知道意思，俺就不多写了，具体可以下载demo，里面更为清楚具体。
this a simple tool :), you can realize through this param's name; and clone this demo see more detail.
// rootkey传根部局的可以， 主要用于定位。
// rootkey is your rootWidget's key,it's help for location.
// callback这个是动画的回调，会带会当前动画的status
// callback is animation's status callback,
ParabolaAnimateWidget(rootKey,startOffset,endOffset,Icon(Icons.cancel,color: Colors.greenAccent,),callback,);
MORE #
如果觉得有啥功能需要加上，可以告诉我，有时间我会加上去（具有通用性的） ，你也可以自己直接修改。
if you have some good thoughts about function, can tell me in there, i will add it soon(it's should be a common functional).
UPDATE #
-0.06
bug fixed
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-0.05
add control ratio . default value is 2
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-0.04
change animation's duration time unit to millisecond
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-0.0.3
fix bug
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-0.0.2
resolve bug
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-0.0.1
CORNER #