uzor 1.2.0

Core UI engine — geometry, interaction, input state
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//! InputCoordinator registration helpers for drag handle widgets.

use crate::app_context::ContextManager;
use crate::docking::panels::DockPanel;
use crate::input::core::coordinator::LayerId;
use crate::input::{InputCoordinator, Sense, WidgetKind};
use crate::layout::{LayoutManager, LayoutNodeId, WidgetNode};
use crate::render::RenderContext;
use crate::types::{Rect, WidgetId};

use super::render::draw_drag_handle;
use super::settings::DragHandleSettings;
use super::state::DragHandleState;
use super::types::{DragHandleRenderKind, DragHandleView};

/// Register a drag handle widget with the coordinator for this frame.
///
/// Uses `Sense::DRAG` so the coordinator tracks drag gestures but not clicks.
pub fn register_drag_handle(
    coord: &mut InputCoordinator,
    id: impl Into<WidgetId>,
    rect: Rect,
    layer: &LayerId,
) {
    coord.register_atomic(id, WidgetKind::DragHandle, rect, Sense::DRAG, layer);
}

/// Level 1 — register a drag handle with an explicit `InputCoordinator`.
pub fn register_input_coordinator_drag_handle(
    coord: &mut InputCoordinator,
    id: impl Into<WidgetId>,
    rect: Rect,
    layer: &LayerId,
    _state: &mut DragHandleState,
) {
    coord.register_atomic(id, WidgetKind::DragHandle, rect, Sense::DRAG, layer);
}

/// Level 2 — register a drag handle via `ContextManager`, pulling state from the registry,
/// and draw it using the provided render context.
///
/// `view` supplies the bounding rect. `settings` supplies visual style.
/// `kind` selects the render variant (invisible hit zone, grip dots, or custom).
pub fn register_context_manager_drag_handle(
    ctx: &mut ContextManager,
    render: &mut dyn RenderContext,
    id: impl Into<WidgetId>,
    rect: Rect,
    layer: &LayerId,
    view: &DragHandleView,
    settings: &DragHandleSettings,
    kind: &DragHandleRenderKind,
) {
    let id: WidgetId = id.into();
    let state = ctx.registry.get_or_insert_with(id.clone(), DragHandleState::default);
    register_input_coordinator_drag_handle(&mut ctx.input, id, rect, layer, state);
    draw_drag_handle(render, rect, view, settings, kind);
}

/// Level 3 — register a drag handle via `LayoutManager`, forwarding to L2.
pub fn register_layout_manager_drag_handle<P: DockPanel>(
    layout: &mut LayoutManager<P>,
    render: &mut dyn RenderContext,
    parent: LayoutNodeId,
    id: impl Into<WidgetId>,
    rect: Rect,
    view: &DragHandleView,
    settings: &DragHandleSettings,
    kind: &DragHandleRenderKind,
) {
    let id: WidgetId = id.into();
    let layer = layout.compute_layer_for(parent);
    layout.tree_mut().add_widget(parent, WidgetNode { id: id.clone(), kind: WidgetKind::DragHandle, rect, sense: Sense::DRAG });
    register_context_manager_drag_handle(
        layout.ctx_mut(), render, id, rect, &layer, view, settings, kind,
    );
}