Dropdown button display text cut off Flutter

Question

Hi I have a dropdown button whose hint and selected value text is cut off when too long:

It should be displaying "Department Code / Department Number"

Code:

DropdownButton<String> dropdownList(BuildContext context) {
  return new DropdownButton<String>(
    hint: new Text(
      "Department Code / Department Number", 
    ),
    value: selectedDept,
    isDense: true,
    onChanged: (String newValue) {
      //...
    },
    items: _item.map((Dept map) {
      return new DropdownMenuItem<String>(
        value: map.code,
        child:
            new Text(map.code, style: new TextStyle(color: Colors.black)),
      );
    }).toList(),
    isExpanded: true,
  );
}


 Widget build(BuildContext context) {
    return Scaffold(
        child: Column(
            children: <Widget>[
                Container(
                  padding: EdgeInsets.fromLTRB(
                      20, 20, 10, 20),
                  decoration: ShapeDecoration(
                    shape: RoundedRectangleBorder(
                      side: BorderSide(
                          width: 1.0,
                          style: BorderStyle.solid,
                          color: Colors.grey[400]),
                      borderRadius:
                          BorderRadius.all(
                              Radius.circular(
                                  15.0)),
                    ),
                  ),
                  child:
                      DropdownButtonHideUnderline(
                          child: dropdownList(
                              context)),
                )
            ]
        )

    )
}

Any idea how to fix the display?

The only way I was able to replicate your issue was by giving a custom bounds to the Container which holds the dropdown. But the code you provided doesn't have any bounds. Try to give width and height to the Container and adjust them per your need to see the hint text render properly. — Darshan
– Darshan, Commented May 27, 2020 at 7:24
@Darshan hmm ya I didnt provide the entire scaffold layout as its too long. Okay i'll give it a try, thanks — Huiting
– Huiting, Commented May 27, 2020 at 7:36
Try with wrapping the text widget in horizontal listview with maxLine property of the text as 1. — proversion
– proversion, Commented May 27, 2020 at 20:55

chetan vallish · Accepted Answer · 2021-08-09 07:16:32Z

2

If you dont want to increase the size of the dropdown, Change the content padding to something that suits you.

DropdownButtonFormField(
        itemHeight: 50,
        decoration: InputDecoration(
            contentPadding:
                EdgeInsets.symmetric(vertical: 5, horizontal: 10),
           .
           .
           .

Theres usually a default value for contentPadding which is cutting up your text. To access input decoration you'll need to use DropdownButtonFromField

answered Aug 9, 2021 at 7:16

chetan vallish

214 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Gene · Accepted Answer · 2020-05-29 01:52:50Z

0

In the Container(), add in BoxConstraints and specify minHeight and maxHeight

constraints: new BoxConstraints(
  minHeight: 50.0,
  maxHeight: 70.0,
)

answered May 29, 2020 at 1:52

Gene

2,2384 gold badges31 silver badges52 bronze badges

Comments

hiashutoshsingh · Accepted Answer · 2020-05-27 17:08:40Z

0

Just add padding to make space between your inner content.

 return DropdownMenuItem<String>(
                        value: value,
                        child: Padding(
                          padding: EdgeInsets.all(4),
                          child: Text(map.code, style: new TextStyle(color: Colors.black)),
                        ),
                      );

answered May 27, 2020 at 17:08

hiashutoshsingh

1,0203 gold badges16 silver badges41 bronze badges

Collectives™ on Stack Overflow

Dropdown button display text cut off Flutter

3 Answers 3

Comments

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

Comments

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related