windows-reactor list drag-and-drop

[kennykerr]

Add can_drag_items, can_reorder_items, and allow_drop builder methods to list_view and grid_view for drag-and-drop reordering support. Adds the required bindings filter entries, wires the properties through the reconciler and WinUI backend, includes a selftest fixture that verifies the native control properties, updates the list_view and grid_view examples to demonstrate reordering, and fixes a pre-existing padding vs margin warning in the list_view example.

Examples:

 cargo run -p reactor_minimal --example list_view
 cargo run -p reactor_minimal --example grid_view

Fixes: #4506

[Copilot]

Pull request overview

Adds WinUI drag-and-drop/reordering support to windows-reactor’s templated lists by exposing builder flags and plumbing them through reconciliation into the WinUI backend, with updated bindings and examples. This addresses #4506 by enabling ListView/GridView reordering scenarios similar to the C# gallery.

Changes:

• Add can_drag_items, can_reorder_items, and allow_drop to the templated list builder and propagate them through the reconciler/backend.
• Extend reactor binding generation inputs and generated bindings to include the required WinUI APIs.
• Add a selftest fixture for the new behavior and update minimal examples to demonstrate reordering.

Reviewed changes

Copilot reviewed 12 out of 12 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
crates/tools/reactor/src/test.txt	Adds getter APIs to the bindings filter for selftest validation.
crates/tools/reactor/src/base.txt	Adds setter APIs to the bindings filter for runtime support.
crates/tests/libs/reactor_selftest/src/registry.rs	Registers a new fixture covering reorderable list view.
crates/tests/libs/reactor_selftest/src/fixtures/controls.rs	Adds a reorderable ListView fixture and validates native properties.
crates/tests/libs/reactor_selftest/src/bindings.rs	Updates generated selftest bindings to include the new vtable methods.
crates/samples/reactor/minimal/examples/list_view.rs	Demonstrates list_view drag-to-reorder and fixes the padding/margin warning.
crates/samples/reactor/minimal/examples/grid_view.rs	Demonstrates grid_view drag-to-reorder.
crates/libs/reactor/src/winui/backend/mod.rs	Wires the new flags through to WinUI put_* calls.
crates/libs/reactor/src/core/templated_list.rs	Adds builder fields/methods and stores the new flags on the element.
crates/libs/reactor/src/core/reconciler/templated.rs	Applies the new flags on mount and updates them on diff.
crates/libs/reactor/src/core/backend.rs	Adds backend hooks + recording ops for the new templated list flags.
crates/libs/reactor/src/bindings.rs	Updates generated runtime bindings with the required WinUI setters.

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[Copilot]

Pull request overview

Copilot reviewed 12 out of 12 changed files in this pull request and generated 3 comments.