如何根据内容调整小部件的大小

Question

I am using a draggable scrollable sheet and I want it to show the content based on how much content is currently to show in sheet for ex if I am using a visibility widget and it is visibility is false it should not show the space for it, but if it is true it should automatically resizes itself and show it on screen, I have total 4 widgets in my sheet 2 of them are in visibilty widget

Answer 1

when the visibility of widget changes you can change the minChildSize and maxChildSize of draggableScrollableSheet and set it to a specific value.

Answer 2

If you want to hide and unhide a widget but don't want that the hidden widget to take space on screen then instead of Visibility you should use if without any curly braces something like this.

Column(
  Children:[
   Text(Hello), 
   if(_isVisible) 
   SizedBox(height:200, width:500)
  ]
  ) 

If you want to add multiple column widget to be hide and show then use spread operator

Column(
  Children:[
   Text(Hello), 
   if(_isVisible) ...[
   SizedBox(height:200, width:500), 
   Container(height:400, width:500, 
       Color:Colors.red) 
    ]
  ])