v1: Add Dropdown.text property, add on_select event
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Deleted the before_update method in the Dropdown class, which previously set expand_loose based on expand. This change may address redundant or obsolete logic related to display issues.
Introduces a new example demonstrating a reactive dropdown control in Flet. The example uses a dataclass to manage state and updates the selected color dynamically.
Renamed Dropdown event handlers from on_change to on_select and on_text_change to on_change for clarity and consistency. Updated related property names from 'value' to 'text' where appropriate, and improved documentation for several Dropdown properties. Added a new example demonstrating both select and change events.
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Pull Request Overview
This PR enhances the Dropdown control by adding a text property for editable input fields and separating selection events from text change events. The PR introduces the on_select event specifically for dropdown selection changes while repurposing on_change for text input changes.
- Add
textproperty to track editable text input separately from selected value - Separate
on_selectevent for dropdown selections fromon_changefor text changes - Update documentation for previously undocumented properties
Reviewed Changes
Copilot reviewed 7 out of 7 changed files in this pull request and generated 2 comments.
Show a summary per file
| File | Description |
|---|---|
| dropdown.py | Add text property, rename events, update documentation, remove unused method |
| select_and_change_events.py | New example demonstrating both selection and text change events |
| reactive.py | New example showing reactive dropdown usage with state management |
| color_selection_with_filtering.py | Update to use new on_select event instead of on_change |
| pyproject.toml | Bump Python requirement to 3.10+ |
| properties_table.py | Refactor to use proper None comparisons and capture event properties |
| dropdown.dart | Update Dart implementation to support new text property and events |
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sdk/python/packages/flet/src/flet/controls/material/dropdown.py
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Co-authored-by: Copilot <[email protected]>
This reverts commit 536e8b3.
Expanded the docstring for the border_radius property to specify accepted value types and default behavior when set to None.
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ndonkoHenri
approved these changes
Aug 24, 2025
Introduces three new example scripts demonstrating CPU-bound task handling in Flet apps: cpu_bound_callback.py (thread-safe UI updates via callback), cpu_bound_queue.py (progress updates via asyncio.Queue), and cpu_bound_png_stream.py (streaming PNG frames from a producer thread to an async consumer). These examples illustrate best practices for integrating blocking operations with asyncio and Flet UI.
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Summary by Sourcery
Add a
textproperty andon_selectevent to the Dropdown control, update the underlying implementations, refactor the properties table logic, and refresh examples to demonstrate both selection and text-change interactions.New Features:
textproperty to Python Dropdown for editable inputon_selectevent callback in Python Dropdown for selection changestextproperty andselectevent in Dart dropdown implementationEnhancements:
on_changewithon_selectwhere appropriateBuild: