TextFormField input text overflow with DropdownButtonFormField, Flutter

Question

I have layout issues because the text from the dropdown menu that you choose can't fit inside the TextFormField and I can't seem to fix this issue. I have tried adding the overflow: TextOverflow.ellipsis property but that only changes for the dropdown labels, still when I choose one, they can't fit inside the TextFormField.

When you press the dropdown button, it shows like this:

and with the TextOverflow.elipsis property:

which is fine, but I still have the layout issue because of the chosen text that is now displayed inside the textformfield:

How can I add the same property to the TextFormField, or any sort of solution to this issue? The code:

Row(
                                    children: [
                                      Expanded(
                                        child: DropdownButtonFormField<String>(
                                          decoration:
                                              kTextFieldDecoration.copyWith(
                                            hintText: 'Legal status',
                                            labelText: 'Legal status',
                                          ),
                                          value: _legalStatus,
                                          items: [
                                            'Sole proprietorship',
                                            'Partnerships',
                                            'Limited Liability Company (LLC)',
                                            'Corporation',
                                            'Small Business Corporation (S-Corporation)'
                                          ]
                                              .map((label) => DropdownMenuItem(
                                                    child: Text(
                                                      label.toString(),
                                                    ),
                                                    value: label,
                                                  ))
                                              .toList(),
                                          onChanged: (value) {
                                            setState(() {
                                              _legalStatus = value;
                                              print(value);
                                            });
                                          },
                                          validator: (thisValue) {
                                            if (thisValue == null) {
                                              return 'Please choose your legal status';
                                            }
                                            return null;
                                          },
                                        ),
                                      ),
                                      SizedBox(
                                        width: 16.0,
                                      ),
                                      Container(
                                        width: 120.0,
                                        child: DropdownButtonFormField<String>(
                                          decoration:
                                              kTextFieldDecoration.copyWith(
                                            hintText: 'Year established',
                                            labelText: 'Year established',
                                          ),
                                          value: _yearEstablished,
                                          items: items // a list of numbers that are Strings
                                              .map((label) => DropdownMenuItem(
                                                    child:
                                                        Text(label.toString()),
                                                    value: label,
                                                  ))
                                              .toList(),
                                          onChanged: (value) {
                                            setState(() {
                                              _yearEstablished = value;
                                              print(value);
                                            });
                                          },
                                          validator: (thisValue) {
                                            if (thisValue == null) {
                                              return 'Please choose your company year of establishment';
                                            }
                                            return null;
                                          },
                                        ),
                                      ),
                                    ],
                                  ),

Thanks in advance for your help!

Diwyansh · Accepted Answer · 2021-12-20 14:05:19Z

You need to use isExpanded property of DropDownFormField to solve this error.

Row(
                                    children: [
                                      Expanded(
                                        child: DropdownButtonFormField<String>(
                                          isExpanded: true,
                                          decoration:
                                              kTextFieldDecoration.copyWith(
                                            hintText: 'Legal status',
                                            labelText: 'Legal status',
                                          ),
                                          value: _legalStatus,
                                          items: [
                                            'Sole proprietorship',
                                            'Partnerships',
                                            'Limited Liability Company (LLC)',
                                            'Corporation',
                                            'Small Business Corporation (S-Corporation)'
                                          ]
                                              .map((label) => DropdownMenuItem(
                                                    child: Text(
                                                      label.toString(),
                                                    ),
                                                    value: label,
                                                  ))
                                              .toList(),
                                          onChanged: (value) {
                                            setState(() {
                                              _legalStatus = value;
                                              print(value);
                                            });
                                          },
                                          validator: (thisValue) {
                                            if (thisValue == null) {
                                              return 'Please choose your legal status';
                                            }
                                            return null;
                                          },
                                        ),
                                      ),
                                      SizedBox(
                                        width: 16.0,
                                      ),
                                      Container(
                                        width: 120.0,
                                        child: DropdownButtonFormField<String>(
                                          decoration:
                                              kTextFieldDecoration.copyWith(
                                            hintText: 'Year established',
                                            labelText: 'Year established',
                                          ),
                                          value: _yearEstablished,
                                          items: items // a list of numbers that are Strings
                                              .map((label) => DropdownMenuItem(
                                                    child:
                                                        Text(label.toString()),
                                                    value: label,
                                                  ))
                                              .toList(),
                                          onChanged: (value) {
                                            setState(() {
                                              _yearEstablished = value;
                                              print(value);
                                            });
                                          },
                                          validator: (thisValue) {
                                            if (thisValue == null) {
                                              return 'Please choose your company year of establishment';
                                            }
                                            return null;
                                          },
                                        ),
                                      ),
                                    ],
                                  ),

Yes, this fixed the layout issue. Is there a possibility to to implement a TextOverflow.ellipsis like solution? I just think it is better looking to have a Limited Liability ... instead of the Expanded view of the text. Thanks for the help!
I will, of course. Do you maybe have the solution to what I asked in the comment above?
TextOverflow.ellipsis will not work here because the problem is when you open dropdown it increases size the DropDown field that's why we see the error.

Ahmed Elsayed · Accepted Answer · 2021-12-20 17:30:19Z

0

You need to use selectedItemBuilder parameter which will control how the selected item will be displayed on the button. Then, TextOverflow.ellipsis will work with you as expected. Here's how to use it:

selectedItemBuilder: (BuildContext context) {
      return items.map<Widget>((String item) {
        return Text(item, overflow: TextOverflow.ellipsis,);
      }).toList();
    },

answered Dec 20, 2021 at 17:30

Ahmed Elsayed

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