How to remove padding from some children in a Column?-CodePudding

Padding(
  padding: const EdgeInsets.all(20.0),
  child: Column(
    children: [
      // ... some widgets
      Padding(
        padding: const EdgeInsets.all(-20.0), // Error: How to do something like this?
        child: FooWidget()
      ), 
      // ... more widgets
      BarWidget(), // Remove padding from here also
      // ... and some more widgets
    ],
  ),
)

I'm providing a padding of 20 to my Column, but I want to remove this padding from some of its children, like FooWidget, BarWidget, etc. How can I do that?

Note: I'm not looking for workarounds like provide the padding to other widgets instead of the root Column or wrap those widgets in another Column and provide that column a padding, etc.

CodePudding user response：

you can apply transformation to the widgets that you want to remove the padding for, for example:

Container(
              transform: Matrix4.translationValues(-20.0, 0, 0.0), //here
              child: FooWidget()),

CodePudding user response：

Padding in inside the limit box of area of the child, but you need to margins by negative values. Use Positioned() widget as this:

Padding(
  padding: const EdgeInsets.all(20.0),
  child: Column(
    children: [
      // ... some widgets
      // Padding(.  comment this 
       //  padding: const EdgeInsets.all(-20.0), and comment this

      Positioned(  // wrap with this widget by any 
                    // double values of top, bottom, 
                    // left or right as you want.
          top: 10.0,
          left: -15.0,
          right: -15.0,
          child: FooWidget()
      ), 
      /// TODO: the same idea to any widget
      // ... more widgets
      BarWidget(), // Remove padding from here also 
      // ... and some more widgets
    ],
  ),
)