# How to Create a Custom Dialog for Your FlutterFlow App

- Tool: FlutterFlow
- Difficulty: Beginner
- Time required: 20-25 min
- Compatibility: FlutterFlow Free+
- Last updated: March 2026

## TL;DR

FlutterFlow dialogs are small centered Components triggered by Show Dialog action. This tutorial builds three patterns: a confirmation dialog with Cancel/Confirm buttons returning a boolean, an input dialog with a validated TextField returning a string, and a picker dialog with a selectable list returning the chosen item. All use Action Parameter callbacks to pass results back to the parent page. Dialogs differ from modals in being smaller, purpose-specific, and blocking all background interaction.

## Three Essential Dialog Patterns for FlutterFlow Apps

Dialogs are purpose-specific popups that require user input before proceeding. Unlike bottom sheets, dialogs block all background interaction with a modal barrier. This tutorial covers three patterns every app needs: confirmations for destructive actions, input dialogs for collecting text, and picker dialogs for selecting from a list.

## Before you start

- A FlutterFlow project open in the builder
- Understanding of Components and Component Parameters
- Understanding of Action Flow and Show Dialog action

## Step-by-step guide

### 1. Build a confirmation dialog Component with destructive action styling

Create a Component called ConfirmDeleteDialog. Layout: Container (borderRadius 16, white bg, padding 24, maxWidth 320). Column children: Icon widget (warning icon, amber, size 40, centered), SizedBox(16), Text title bound to title param (Headline Small, center), SizedBox(8), Text message bound to message param (Body Medium, grey, center), SizedBox(24), Row with spaceBetween: Button 'Cancel' (outlined style, On Tap: Navigator Pop) and Button 'Delete' (red background, white text, On Tap: Execute Callback onConfirm then Navigator Pop). The red Delete button signals this is a destructive action.

**Expected result:** A dialog Component with a warning icon, message, and red destructive action button.

### 2. Build an input dialog Component that returns a string value

Create a Component called TextInputDialog. Parameters: title (String), hint (String), onSubmit (Action with String parameter). Layout: Container (same styling as confirmation). Column: Text title, SizedBox(16), TextField with hint text bound to hint param, maxLength 100, and a validator for non-empty. SizedBox(24), Row with Cancel button (Navigator Pop) and Submit button. Submit button: check TextField is not empty via Conditional enabled, then Execute Callback onSubmit passing the TextField value, then Navigator Pop. Bind TextField value to Component State inputValue.

**Expected result:** A dialog with a text field that validates input and returns the entered string to the parent.

### 3. Build a picker dialog Component with a selectable list

Create a Component called PickerDialog. Parameters: title (String), options (String List), onSelect (Action with String parameter). Layout: Container with Column: Text title, SizedBox(12), a constrained-height ListView (maxHeight 300) with Generate Dynamic Children from the options list parameter. Each child is a ListTile-style Row (Text option + trailing checkmark if selected). On tap: set Component State selectedItem to the tapped option and update the visual selection. Below the list: Button 'Select' that Execute Callback onSelect with selectedItem, then Navigator Pop.

**Expected result:** A dialog with a scrollable list of options, selection highlight, and a Select button returning the chosen item.

### 4. Trigger each dialog from the parent page with Show Dialog

On your parent page, add three buttons for testing. Button 1 On Tap: Show Dialog → ConfirmDeleteDialog, pass title 'Delete Item?' and message 'This cannot be undone.', bind onConfirm to the delete action. Button 2 On Tap: Show Dialog → TextInputDialog, pass title 'Rename Item' and hint 'Enter new name', bind onSubmit to the rename action with the returned string. Button 3 On Tap: Show Dialog → PickerDialog, pass title 'Select Category' and options list, bind onSelect to the filter action with the returned selection.

**Expected result:** Each button opens the correct dialog type, and the parent page receives the returned data after dialog closes.

### 5. Handle dialog results in the parent page action flow

After each Show Dialog action in the parent's action flow, add the follow-up logic. For confirmation: if callback was executed, proceed with Delete Document action. For input: use the returned string to Update Document name field. For picker: update a Page State filter variable and re-trigger the Backend Query. The action flow after Show Dialog executes after the dialog is dismissed, giving you access to any values returned via callbacks.

**Expected result:** The parent page performs the correct action based on the dialog result: delete, rename, or filter.

## Complete code example

File: `FlutterFlow Dialog Patterns`

```text
PATTERN 1: CONFIRMATION DIALOG
  Component: ConfirmDeleteDialog
  Parameters: title (String), message (String), onConfirm (Action)
  Layout:
    Container (borderRadius: 16, padding: 24, maxWidth: 320)
      Column (crossAxisAlignment: center)
        Icon (warning, amber, 40)
        Text (title, Headline Small)
        Text (message, Body Medium, grey)
        Row (spaceBetween)
          Button "Cancel" → Navigator Pop
          Button "Delete" (red bg) → Execute Callback onConfirm → Navigator Pop

PATTERN 2: INPUT DIALOG
  Component: TextInputDialog
  Parameters: title (String), hint (String), onSubmit (Action<String>)
  Component State: inputValue (String)
  Layout:
    Container (borderRadius: 16, padding: 24, maxWidth: 320)
      Column
        Text (title)
        TextField (hint, maxLength: 100, bound to inputValue)
        Row
          Button "Cancel" → Navigator Pop
          Button "Submit" (enabled: inputValue.isNotEmpty)
            → Execute Callback onSubmit(inputValue) → Navigator Pop

PATTERN 3: PICKER DIALOG
  Component: PickerDialog
  Parameters: title (String), options (List<String>), onSelect (Action<String>)
  Component State: selectedItem (String)
  Layout:
    Container (borderRadius: 16, padding: 24, maxWidth: 320)
      Column
        Text (title)
        ListView (maxHeight: 300, children: options)
          Row per option: Text + checkmark if selected
          On Tap: set selectedItem
        Button "Select" (enabled: selectedItem != null)
          → Execute Callback onSelect(selectedItem) → Navigator Pop
```

## Common mistakes

- **Confusing Dialog with Bottom Sheet for the wrong purpose** — Dialogs block all interaction with a modal barrier — appropriate for confirmations requiring a decision. Bottom sheets allow partial background interaction — appropriate for supplementary content. Mixing them up creates confusing UX. Fix: Use Dialog for confirmations, inputs, and critical decisions. Use Bottom Sheet for filters, settings, and browsable content.
- **Making the dialog too large or adding too much content** — Dialogs should be small and focused. A dialog with a long form or scrolling content should be a Bottom Sheet or a full page instead. Fix: Keep dialogs to one action: confirm/cancel, enter one value, or pick one item. For complex forms, use a Bottom Sheet or navigate to a page.
- **Not adding maxWidth constraint on the dialog Container** — Without maxWidth, the dialog stretches to full screen width on tablets and desktops, looking awkward. It should stay compact and centered. Fix: Set maxWidth to 320-400 pixels on the outer Container so the dialog maintains a compact card shape on all screen sizes.

## Best practices

- Use red/destructive color on confirm buttons for delete operations to clearly signal the action
- Always provide a Cancel button or backdrop dismiss so users can exit without acting
- Set maxWidth on the dialog Container (320-400px) for consistent sizing on all devices
- Validate input fields before enabling the Submit button in input dialogs
- Keep dialog content focused on one task — if it needs scrolling, use a Bottom Sheet instead
- Use Action Parameter callbacks to return typed data from dialogs to the parent page
- Show a warning icon for destructive confirmation dialogs to increase visual urgency

## Frequently asked questions

### What is the difference between a dialog and a modal?

A dialog is a type of modal — specifically a small, centered, purpose-specific popup. 'Modal' is a broader term that includes dialogs, bottom sheets, and full-screen overlays. In FlutterFlow, the Show Dialog action creates a centered modal with a blocking barrier.

### Can I style the backdrop overlay color?

FlutterFlow's built-in Show Dialog uses a default semi-transparent black backdrop. To customize the color or opacity, you need a Custom Widget using showDialog() directly in Dart.

### How do I close a dialog programmatically from a Custom Action?

Call Navigator.of(context).pop() in your Custom Action code. In FlutterFlow visual builder, use the Navigator Pop action in the action flow.

### Can a dialog contain a form with multiple fields?

Technically yes, but dialogs are designed for brief interactions. If your form has more than 2-3 fields, use a Bottom Sheet or navigate to a full page instead.

### Can I animate the dialog entrance?

FlutterFlow's Show Dialog uses the default Material fade-in animation. For custom animations (slide, scale, bounce), create a Custom Widget using showGeneralDialog() with a custom transitionBuilder.

### Can RapidDev help create advanced dialog workflows?

Yes. RapidDev can build multi-step dialogs, animated entrances, complex validation patterns, and custom dialog systems for specialized use cases.

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Source: https://www.rapidevelopers.com/flutterflow-tutorials/how-to-create-a-custom-dialog-for-your-flutterflow-app
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