How to set the width of a RaisedButton in Flutter?

Question

I have seen that I can\'t set the width of a RaisedButton in Flutter. If I have well understood, I should put the RaisedButton into a SizedBox

Answer 1

That's because flutter is not about size. It's about constraints.

Usually we have 2 use cases :

• The child of a widget defines a constraint. The parent size itself is based on that information. ex: Padding, which takes the child constraint and increases it.
• The parent enforce a constraint to its child. ex: SizedBox, but also Column in strech mode, ...

RaisedButton is the first case. Which means it's the button which defines its own height/width. And, according to material rules, the raised button size is fixed.

You don't want that behavior, therefore you can use a widget of the second type to override the button constraints.

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Anyway, if you need this a lot, consider either creating a new widget which does the job for you. Or use MaterialButton, which possesses a height property.