fix(client): fire GestureDetector.on_tap_move events

[inchang-ing]

Summary

Fixes #6961: GestureDetector.on_tap_move now reaches its Python handler.

Flutter's GestureDetector does not forward onTapMove to its TapGestureRecognizer. When tap moves are subscribed, Flet routes all primary, secondary, and tertiary tap callbacks through one recognizer registered by RawGestureDetector. This preserves a single functioning accessibility tap action when secondary or tertiary handlers are also subscribed.

The recognizer's supportedDevices is refreshed on every rebuild so changes to allowed_devices take effect. Media query gesture settings and exclude_from_semantics are preserved. The raw wrapper stays mounted when tap-move subscriptions change, preserving content state and focus. When tap moves are not subscribed, callbacks continue to use Flutter's GestureDetector.

Includes a changelog entry under 1.1.0. Targets flet-1.1.0.

Validation

On Flutter 3.47.7, as pinned by the target release:

• 23 gesture-detector widget tests pass: tap moves, move-only subscriptions, cancellation, device-filter updates, primary tap semantics with secondary/tertiary handlers, double taps, long presses, secondary/tertiary mouse taps and cancellation, and focused content surviving subscription changes in both directions.
• Existing list_tile_test.dart and control_test.dart suites pass (41 tests total across the three suites).
• Static analysis of the changed implementation and tests reports no issues.

Summary by Sourcery

Fix tap-move event delivery in gesture detectors without disrupting existing tap, accessibility, or child-state behavior.

Bug Fixes:

• Fix GestureDetector.on_tap_move events so they reach Python handlers while preserving primary, secondary, and tertiary tap behavior and accessibility semantics.
• Ensure gesture device filters update correctly when allowed_devices changes.

Enhancements:

• Preserve gesture settings and child widget state when switching tap-move handling.

Tests:

• Add comprehensive gesture detector coverage for tap moves, cancellation, device filters, accessibility actions, competing gestures, mouse buttons, and state preservation.

[CLAassistant]

All committers have signed the CLA.

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[FeodorFitsner]

Pushed fixes for the two review findings in 8d2cb43:

• Refresh supportedDevices on rebuild so changes to allowed_devices take effect.
• Route primary, secondary, and tertiary tap callbacks through the same recognizer when tap moves are subscribed, preserving one functioning accessibility tap target.

Added regression tests and moved the changelog entry to 1.1.0. All 39 tests across gesture_detector_test.dart, list_tile_test.dart, and control_test.dart pass on Flutter 3.47.7; static analysis of the changed implementation and tests is clean.

The PR now targets flet-1.1.0; its diff contains only the gesture detector, its tests, and the root changelog (3 files).

[Copilot]

🟡 Changes recommended

Toggling the tap-move subscription recreates the content subtree, losing local widget state.

1 open issue

• Toggling on_tap_move recreates content and loses widget state · New

What changed in this PR

Fixes #6961 by routing tap-move events through a raw tap recognizer so they reach Python handlers.

Changes:

• Routes tap callbacks through one recognizer when tap moves are subscribed.
• Adds regression tests for gestures, accessibility, and device filtering.
• Documents the fix in the 1.1.0 changelog.

File	Description
packages/​flet/​test/​widgets/​gesture_detector_test.dart	Adds gesture and accessibility regression tests.
packages/​flet/​lib/​src/​controls/​gesture_detector.dart	Implements conditional raw tap recognition.
CHANGELOG.md	Records the tap-move fix.

_{Review effort: Balanced}