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.
Prerequisites
- 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
Build a confirmation dialog Component with destructive action styling
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.
Build an input dialog Component that returns a string value
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.
Build a picker dialog Component with a selectable list
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.
Trigger each dialog from the parent page with Show Dialog
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.
Handle dialog results in the parent page action flow
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 working example
1PATTERN 1: CONFIRMATION DIALOG2 Component: ConfirmDeleteDialog3 Parameters: title (String), message (String), onConfirm (Action)4 Layout:5 Container (borderRadius: 16, padding: 24, maxWidth: 320)6 Column (crossAxisAlignment: center)7 Icon (warning, amber, 40)8 Text (title, Headline Small)9 Text (message, Body Medium, grey)10 Row (spaceBetween)11 Button "Cancel" → Navigator Pop12 Button "Delete" (red bg) → Execute Callback onConfirm → Navigator Pop1314PATTERN 2: INPUT DIALOG15 Component: TextInputDialog16 Parameters: title (String), hint (String), onSubmit (Action<String>)17 Component State: inputValue (String)18 Layout:19 Container (borderRadius: 16, padding: 24, maxWidth: 320)20 Column21 Text (title)22 TextField (hint, maxLength: 100, bound to inputValue)23 Row24 Button "Cancel" → Navigator Pop25 Button "Submit" (enabled: inputValue.isNotEmpty)26 → Execute Callback onSubmit(inputValue) → Navigator Pop2728PATTERN 3: PICKER DIALOG29 Component: PickerDialog30 Parameters: title (String), options (List<String>), onSelect (Action<String>)31 Component State: selectedItem (String)32 Layout:33 Container (borderRadius: 16, padding: 24, maxWidth: 320)34 Column35 Text (title)36 ListView (maxHeight: 300, children: options)37 Row per option: Text + checkmark if selected38 On Tap: set selectedItem39 Button "Select" (enabled: selectedItem != null)40 → Execute Callback onSelect(selectedItem) → Navigator PopCommon mistakes when creating a Custom Dialog for Your FlutterFlow App
Why it's a problem: Confusing Dialog with Bottom Sheet for the wrong purpose
How to avoid: Use Dialog for confirmations, inputs, and critical decisions. Use Bottom Sheet for filters, settings, and browsable content.
Why it's a problem: Making the dialog too large or adding too much content
How to avoid: 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.
Why it's a problem: Not adding maxWidth constraint on the dialog Container
How to avoid: 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
Still stuck?
Copy one of these prompts to get a personalized, step-by-step explanation.
I need to build three dialog patterns in FlutterFlow: a delete confirmation dialog with warning icon and red delete button, a text input dialog with validation, and a list picker dialog. All should return data to the parent via Action Parameter callbacks. Describe the widget tree and action flow for each.
Create a Component with a white rounded Container, a warning icon centered at top, a title text, a message text, and two side-by-side buttons: Cancel (outlined) and Delete (red background).
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.
Talk to an Expert
Our team has built 600+ apps. Get personalized help with your project.
Book a free consultation