how to add a specific property to Widget without wrapping it as a child using extension in flutter答案

【问题标题】：how to add a specific property to Widget without wrapping it as a child using extension in flutterhow to add a specific property to Widget without wrapping it as a child using extension in flutter
【发布时间】：2022-12-02 02:10:07
【问题描述】：

I am using extension to give padding to the widget

Extension:

extension Hello on Widget {
    paddingAll(int x) {
       return Container(
         padding: const EdgeInsets.all(x.toDouble()),
         child: this,
       );
 }

Use Case :

Container( child: Text("Hello")).paddingAll(40);

But this evaluates to :

 return Container(
   padding: const EdgeInsets.all(20),
   child: Container(
       child: Text("Hello"),
   ));

What I want is :

return Container(
    padding: const EdgeInsets.all(20),
    child: Text("Hello"),
    );

How to achieve this via extension function? If any further more simplified method ,please suggest the same .

【问题讨论】：

what problem facing now?
I want to write an extension which evaluates to what i want is code. What i have now is the above one
you can simply check over it inside the extension method, if(this == Container)...

标签： flutter widget extension-methods

【解决方案1】：

try this

extension Hello on Widget {
  paddingAll(int x) {
  return Padding(
  padding: EdgeInsets.all(x.toDouble()),
    child: this
);
}
}

【讨论】：